SST: Implement PSA Protected Storage 1.0

Refactors SST to implement PSA Protected Storage version 1.0.

Change-Id: I967375e98799a465069525f203881f5331d6d84a
Signed-off-by: Galanakis, Minos <minos.galanakis@arm.com>
diff --git a/interface/include/psa/protected_storage.h b/interface/include/psa/protected_storage.h
index f27c53f..ffac7a4 100644
--- a/interface/include/psa/protected_storage.h
+++ b/interface/include/psa/protected_storage.h
@@ -20,14 +20,46 @@
 extern "C" {
 #endif
 
+/**
+ * \brief PSA_PS_API_VERSION version
+ *
+ * Major and minor PSA_PS_API_VERSION numbers
+ */
 #define PSA_PS_API_VERSION_MAJOR  1
 #define PSA_PS_API_VERSION_MINOR  0
 
-// This version of the header file is associated with 1.0 final release.
-
 /**
- * Create a new or modify an existing key/value pair
+ * \brief Create a new, or modify an existing, uid/value pair
  *
+ * Stores data in the internal storage.
+ *
+ * \param[in] uid           The identifier for the data
+ * \param[in] data_length   The size in bytes of the data in `p_data`
+ * \param[in] p_data        A buffer containing the data
+ * \param[in] create_flags  The flags that the data will be stored with
+ *
+ * \return A status indicating the success/failure of the operation
+ *
+ * \retval PSA_SUCCESS                     The operation completed successfully
+ * \retval PSA_ERROR_NOT_PERMITTED         The operation failed because the
+ *                                         provided `uid` value was already
+ *                                         created with
+ *                                         PSA_STORAGE_FLAG_WRITE_ONCE
+ * \retval PSA_ERROR_NOT_SUPPORTED         The operation failed because one or
+ *                                         more of the flags provided in
+ *                                         `create_flags` is not supported or is
+ *                                         not valid
+ * \retval PSA_ERROR_INSUFFICIENT_STORAGE  The operation failed because there
+ *                                         was insufficient space on the
+ *                                         storage medium
+ * \retval PSA_ERROR_STORAGE_FAILURE       The operation failed because the
+ *                                         physical storage has failed (Fatal
+ *                                         error)
+ * \retval PSA_ERROR_INVALID_ARGUMENT      The operation failed because one
+ *                                         of the provided pointers(`p_data`)
+ *                                         is invalid, for example is `NULL` or
+ *                                         references memory the caller cannot
+ *                                         access
  */
 psa_status_t psa_ps_set(psa_storage_uid_t uid,
                         size_t data_length,
@@ -35,7 +67,40 @@
                         psa_storage_create_flags_t create_flags);
 
 /**
- * Retrieve data associated with a provided UID
+ * \brief Retrieve data associated with a provided uid
+ *
+ * Retrieves up to `data_size` bytes of the data associated with `uid`, starting
+ * at `data_offset` bytes from the beginning of the data. Upon successful
+ * completion, the data will be placed in the `p_data` buffer, which must be at
+ * least `data_size` bytes in size. The length of the data returned will be in
+ * `p_data_length`. If `data_size` is 0, the contents of `p_data_length` will
+ * be set to zero.
+ *
+ * \param[in]  uid            The uid value
+ * \param[in]  data_offset    The starting offset of the data requested
+ * \param[in]  data_size      The amount of data requested
+ * \param[out] p_data         On success, the buffer where the data will
+ *                            be placed
+ * \param[out] p_data_length  On success, this will contain size of the data
+ *                            placed in `p_data`
+ *
+ * \return A status indicating the success/failure of the operation
+ *
+ * \retval PSA_SUCCESS                 The operation completed successfully
+ * \retval PSA_ERROR_DOES_NOT_EXIST    The operation failed because the
+ *                                     provided `uid` value was not found in
+ *                                     the storage
+ * \retval PSA_ERROR_STORAGE_FAILURE   The operation failed because the
+ *                                     physical storage has failed (Fatal
+ *                                     error)
+ * \retval PSA_ERROR_INVALID_ARGUMENT  The operation failed because one of the
+ *                                     provided arguments (`p_data`,
+ *                                     `p_data_length`) is invalid, for example
+ *                                     is `NULL` or references memory the
+ *                                     caller cannot access. In addition, this
+ *                                     can also happen if `data_offset` is
+ *                                     larger than the size of the data
+ *                                     associated with `uid`
  */
 psa_status_t psa_ps_get(psa_storage_uid_t uid,
                         size_t data_offset,
@@ -44,26 +109,133 @@
                         size_t *p_data_length);
 
 /**
- * Retrieve the metadata about the provided uid
+ * \brief Retrieve the metadata about the provided uid
+ *
+ * Retrieves the metadata stored for a given `uid`
+ *
+ * \param[in]  uid     The `uid` value
+ * \param[out] p_info  A pointer to the `psa_storage_info_t` struct that will
+ *                     be populated with the metadata
+ *
+ * \return A status indicating the success/failure of the operation
+ *
+ * \retval PSA_SUCCESS                 The operation completed successfully
+ * \retval PSA_ERROR_DOES_NOT_EXIST    The operation failed because the provided
+ *                                     uid value was not found in the storage
+ * \retval PSA_ERROR_STORAGE_FAILURE   The operation failed because the physical
+ *                                     storage has failed (Fatal error)
+ * \retval PSA_ERROR_INVALID_ARGUMENT  The operation failed because one of the
+ *                                     provided pointers(`p_info`)
+ *                                     is invalid, for example is `NULL` or
+ *                                     references memory the caller cannot
+ *                                     access
  */
 psa_status_t psa_ps_get_info(psa_storage_uid_t uid,
                              struct psa_storage_info_t *p_info);
 
 /**
- * Remove the provided uid and its associated data from the storage
+ * \brief Remove the provided uid and its associated data from the storage
+ *
+ * Deletes the data from internal storage.
+ *
+ * \param[in] uid  The `uid` value
+ *
+ * \return A status indicating the success/failure of the operation
+ *
+ * \retval PSA_SUCCESS                 The operation completed successfully
+ * \retval PSA_ERROR_INVALID_ARGUMENT  The operation failed because one or more
+ *                                     of the given arguments were invalid (null
+ *                                     pointer, wrong flags and so on)
+ * \retval PSA_ERROR_DOES_NOT_EXIST    The operation failed because the provided
+ *                                     uid value was not found in the storage
+ * \retval PSA_ERROR_NOT_PERMITTED     The operation failed because the provided
+ *                                     uid value was created with
+ *                                     PSA_STORAGE_FLAG_WRITE_ONCE
+ * \retval PSA_ERROR_STORAGE_FAILURE   The operation failed because the physical
+ *                                     storage has failed (Fatal error)
  */
 psa_status_t psa_ps_remove(psa_storage_uid_t uid);
 
 /**
- * Reserves storage for the specified UID.
+ * \brief Reserves storage for the specified uid
+ *
+ * Upon success, the capacity of the storage will be capacity, and the size
+ * will be 0. It is only necessary to call this function for assets that will
+ * be written with the psa_ps_set_extended function. If only the psa_ps_set
+ * function is needed, calls to this function are redundant.
+ *
+ * \param[in] uid           The `uid` value
+ * \param[in] capacity      The capacity to be allocated in bytes
+ * \param[in] create_flags  Flags indicating properties of storage
+ *
+ * \return A status indicating the success/failure of the operation
+ *
+ * \retval PSA_SUCCESS                     The operation completed successfully
+ * \retval PSA_ERROR_STORAGE_FAILURE       The operation failed because the
+ *                                         physical storage has failed
+ *                                         (Fatal error)
+ * \retval PSA_ERROR_INSUFFICIENT_STORAGE  The operation failed because capacity
+ *                                         is bigger than the current available
+ *                                         space
+ * \retval PSA_ERROR_NOT_SUPPORTED         The operation failed function is
+ *                                         not implemented or one or more
+ *                                         create_flags are not supported.
+ * \retval PSA_ERROR_INVALID_ARGUMENT      The operation failed uid was 0 or
+ *                                         create_flags specified flags that are
+ *                                         not defined in the API.
+ *                                         pointer, wrong flags and so on)
  */
 psa_status_t psa_ps_create(psa_storage_uid_t uid,
                            size_t capacity,
                            psa_storage_create_flags_t create_flags);
 
 /**
- * Sets partial data into an asset based on the given identifier, data_offset,
- * data length and p_data.
+ * \brief Sets partial data into an asset
+ *
+ * Before calling this function, the storage must have been reserved with a call
+ * to psa_ps_create. It can also be used to overwrite data in an asset that was
+ * created with a call to psa_ps_set. Calling this function with data_length = 0
+ * is permitted, which will make no change to the stored data.This function can
+ * overwrite existing data and/or extend it up to the capacity for the uid
+ * specified in psa_ps_create, but cannot create gaps.
+ *
+ * That is, it has preconditions:
+ * - data_offset <= size
+ * - data_offset + data_length <= capacity
+ * and postconditions:
+ * - size = max(size, data_offset + data_length)
+ * - capacity unchanged.
+ *
+ * \param[in] uid          The `uid` value
+ * \param[in] data_offset  Offset within the asset to start the write
+ * \param[in] data_length  The size in bytes of the data in p_data to write
+ * \param[in] p_data       Pointer to a buffer which contains the data to write
+ *
+ * \return A status indicating the success/failure of the operation
+ *
+ * \retval PSA_SUCCESS                  The asset exists, the input parameters
+ *                                      are correct and the data is correctly
+ *                                      written in the physical storage.
+ * \retval PSA_ERROR_STORAGE_FAILURE    The data was not written correctly in
+ *                                      the physical storage
+ * \retval PSA_ERROR_INVALID_ARGUMENT   The operation failed because one or more
+ *                                      of the preconditions listed above
+ *                                      regarding data_offset, size, or
+ *                                      data_length was violated.
+ * \retval PSA_ERROR_DOES_NOT_EXIST     The specified uid was not found
+ * \retval PSA_ERROR_NOT_SUPPORTED      The implementation of the API does not
+ *                                      support this function
+ * \retval PSA_ERROR_GENERIC_ERROR      The operation failed due to an
+ *                                      unspecified error
+ * \retval PSA_ERROR_DATA_CORRUPT       The operation failed because the
+ *                                      existing data has been corrupted.
+ * \retval PSA_ERROR_INVALID_SIGNATURE  The operation failed because the
+ *                                      existing data failed authentication
+ *                                      (MAC check failed).
+ * \retval PSA_ERROR_NOT_PERMITTED      The operation failed because it was
+ *                                      attempted on an asset which was written
+ *                                      with the flag
+ *                                      PSA_STORAGE_FLAG_WRITE_ONCE
  */
 psa_status_t psa_ps_set_extended(psa_storage_uid_t uid,
                                  size_t data_offset,
@@ -71,9 +243,13 @@
                                  const void *p_data);
 
 /**
- * Returns a bitmask with flags set for all of the optional features supported
- * by the implementation.
+ * \brief Lists optional features.
  *
+ * \retval uint32_t                     A bitmask with flags set for all of
+ *                                      the optional features supported by the
+ *                                      implementation.Currently defined flags
+ *                                      are limited to
+ *                                      PSA_STORAGE_SUPPORT_SET_EXTENDED
  */
 uint32_t psa_ps_get_support(void);
 
diff --git a/interface/src/tfm_sst_func_api.c b/interface/src/tfm_sst_func_api.c
index 6d94d67..74262fb 100644
--- a/interface/src/tfm_sst_func_api.c
+++ b/interface/src/tfm_sst_func_api.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -12,73 +12,72 @@
 
 #define IOVEC_LEN(x) (uint32_t)(sizeof(x)/sizeof(x[0]))
 
-psa_ps_status_t psa_ps_set(psa_ps_uid_t uid,
-                           uint32_t data_length,
-                           const void *p_data,
-                           psa_ps_create_flags_t create_flags)
+psa_status_t psa_ps_set(psa_storage_uid_t uid,
+                        size_t data_length,
+                        const void *p_data,
+                        psa_storage_create_flags_t create_flags)
 {
     psa_status_t status;
-    psa_ps_status_t err;
     psa_invec in_vec[] = {
         { .base = &uid,   .len = sizeof(uid) },
         { .base = p_data, .len = data_length },
         { .base = &create_flags, .len = sizeof(create_flags) }
     };
 
-    psa_outvec out_vec[] = {
-        { .base = &err , .len = sizeof(err) }
-    };
-
     status = tfm_ns_interface_dispatch(
                                   (veneer_fn)tfm_tfm_sst_set_req_veneer,
                                   (uint32_t)in_vec,  IOVEC_LEN(in_vec),
-                                  (uint32_t)out_vec, IOVEC_LEN(out_vec));
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
+                                  (uint32_t)NULL, 0);
 
-    return err;
+    /* A parameter with a buffer pointer pointer that has data length longer
+     * than maximum permitted is treated as a secure violation.
+     * TF-M framework rejects the request with TFM_ERROR_INVALID_PARAMETER.
+     */
+    if (status == (psa_status_t)TFM_ERROR_INVALID_PARAMETER) {
+        return PSA_ERROR_INVALID_ARGUMENT;
+    }
+    return status;
 }
 
-psa_ps_status_t psa_ps_get(psa_ps_uid_t uid,
-                           uint32_t data_offset,
-                           uint32_t data_length,
-                           void *p_data)
+psa_status_t psa_ps_get(psa_storage_uid_t uid,
+                        size_t data_offset,
+                        size_t data_size,
+                        void *p_data,
+                        size_t *p_data_length)
 {
     psa_status_t status;
-    psa_ps_status_t err;
     psa_invec in_vec[] = {
         { .base = &uid, .len = sizeof(uid) },
         { .base = &data_offset, .len = sizeof(data_offset) }
     };
 
     psa_outvec out_vec[] = {
-        { .base = &err,   .len = sizeof(err) },
-        { .base = p_data, .len = data_length }
+        { .base = p_data, .len = data_size }
     };
 
+    if (p_data_length == NULL) {
+        return PSA_ERROR_GENERIC_ERROR;
+    }
+
     status = tfm_ns_interface_dispatch(
                                   (veneer_fn)tfm_tfm_sst_get_req_veneer,
                                   (uint32_t)in_vec,  IOVEC_LEN(in_vec),
                                   (uint32_t)out_vec, IOVEC_LEN(out_vec));
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
+    *p_data_length = out_vec[0].len;
 
-    return err;
+    return status;
 }
 
-psa_ps_status_t psa_ps_get_info(psa_ps_uid_t uid, struct psa_ps_info_t *p_info)
+psa_status_t psa_ps_get_info(psa_storage_uid_t uid,
+                             struct psa_storage_info_t *p_info)
 {
     psa_status_t status;
-    psa_ps_status_t err;
     psa_invec in_vec[] = {
         { .base = &uid, .len = sizeof(uid) }
     };
 
     psa_outvec out_vec[] = {
-        { .base = &err,   .len = sizeof(err) },
         { .base = p_info, .len = sizeof(*p_info) }
     };
 
@@ -87,56 +86,44 @@
                                   (uint32_t)in_vec,  IOVEC_LEN(in_vec),
                                   (uint32_t)out_vec, IOVEC_LEN(out_vec));
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
-
-    return err;
+    return status;
 }
 
-psa_ps_status_t psa_ps_remove(psa_ps_uid_t uid)
+psa_status_t psa_ps_remove(psa_storage_uid_t uid)
 {
     psa_status_t status;
-    psa_ps_status_t err;
     psa_invec in_vec[] = {
         { .base = &uid, .len = sizeof(uid) }
     };
 
-    psa_outvec out_vec[] = {
-        { .base = &err, .len = sizeof(err) }
-    };
-
     status = tfm_ns_interface_dispatch(
                                   (veneer_fn)tfm_tfm_sst_remove_req_veneer,
                                   (uint32_t)in_vec,  IOVEC_LEN(in_vec),
-                                  (uint32_t)out_vec, IOVEC_LEN(out_vec));
+                                  (uint32_t)NULL, 0);
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
-
-    return err;
+    return status;
 }
 
-psa_ps_status_t psa_ps_create(psa_ps_uid_t uid, uint32_t size,
-                              psa_ps_create_flags_t create_flags)
+psa_status_t psa_ps_create(psa_storage_uid_t uid,
+                           size_t capacity,
+                           psa_storage_create_flags_t create_flags)
 {
     (void)uid;
-    (void)size;
+    (void)capacity;
     (void)create_flags;
 
-    return PSA_PS_ERROR_NOT_SUPPORTED;
+    return PSA_ERROR_NOT_SUPPORTED;
 }
 
-psa_ps_status_t psa_ps_set_extended(psa_ps_uid_t uid, uint32_t data_offset,
-                                    uint32_t data_length, const void *p_data)
+psa_status_t psa_ps_set_extended(psa_storage_uid_t uid, size_t data_offset,
+                                 size_t data_length, const void *p_data)
 {
     (void)uid;
     (void)data_offset;
     (void)data_length;
     (void)p_data;
 
-    return PSA_PS_ERROR_NOT_SUPPORTED;
+    return PSA_ERROR_NOT_SUPPORTED;
 }
 
 uint32_t psa_ps_get_support(void)
diff --git a/interface/src/tfm_sst_ipc_api.c b/interface/src/tfm_sst_ipc_api.c
index 9ef95ff..4608c90 100644
--- a/interface/src/tfm_sst_ipc_api.c
+++ b/interface/src/tfm_sst_ipc_api.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -13,13 +13,12 @@
 
 #define IOVEC_LEN(x) (uint32_t)(sizeof(x)/sizeof(x[0]))
 
-psa_ps_status_t psa_ps_set(psa_ps_uid_t uid,
-                           uint32_t data_length,
-                           const void *p_data,
-                           psa_ps_create_flags_t create_flags)
+psa_status_t psa_ps_set(psa_storage_uid_t uid,
+                        size_t data_length,
+                        const void *p_data,
+                        psa_storage_create_flags_t create_flags)
 {
     psa_status_t status;
-    psa_ps_status_t err;
     psa_handle_t handle;
 
     psa_invec in_vec[] = {
@@ -28,34 +27,34 @@
         { .base = &create_flags, .len = sizeof(create_flags) }
     };
 
-    psa_outvec out_vec[] = {
-        { .base = &err , .len = sizeof(err) }
-    };
-
     handle = psa_connect(TFM_SST_SET_SID, TFM_SST_SET_VERSION);
     if (!PSA_HANDLE_IS_VALID(handle)) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec), out_vec,
-                      IOVEC_LEN(out_vec));
+    status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec),
+                      NULL, 0);
 
     psa_close(handle);
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    /* A parameter with a buffer pointer pointer that has data length longer
+     * than maximum permitted is treated as a secure violation.
+     * TF-M framework rejects the request with TFM_ERROR_INVALID_PARAMETER.
+     */
+    if (status == (psa_status_t)TFM_ERROR_INVALID_PARAMETER) {
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
-    return err;
+    return status;
 }
 
-psa_ps_status_t psa_ps_get(psa_ps_uid_t uid,
-                           uint32_t data_offset,
-                           uint32_t data_length,
-                           void *p_data)
+psa_status_t psa_ps_get(psa_storage_uid_t uid,
+                        size_t data_offset,
+                        size_t data_size,
+                        void *p_data,
+                        size_t *p_data_length)
 {
     psa_status_t status;
-    psa_ps_status_t err;
     psa_handle_t handle;
 
     psa_invec in_vec[] = {
@@ -64,13 +63,16 @@
     };
 
     psa_outvec out_vec[] = {
-        { .base = &err,   .len = sizeof(err) },
-        { .base = p_data, .len = data_length }
+        { .base = p_data, .len = data_size }
     };
 
+    if (p_data_length == NULL) {
+        return PSA_ERROR_GENERIC_ERROR;
+    }
+
     handle = psa_connect(TFM_SST_GET_SID, TFM_SST_GET_VERSION);
     if (!PSA_HANDLE_IS_VALID(handle)) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec), out_vec,
@@ -78,17 +80,15 @@
 
     psa_close(handle);
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
+    *p_data_length = out_vec[0].len;
 
-    return err;
+    return status;
 }
 
-psa_ps_status_t psa_ps_get_info(psa_ps_uid_t uid, struct psa_ps_info_t *p_info)
+psa_status_t psa_ps_get_info(psa_storage_uid_t uid,
+                             struct psa_storage_info_t *p_info)
 {
     psa_status_t status;
-    psa_ps_status_t err;
     psa_handle_t handle;
 
     psa_invec in_vec[] = {
@@ -96,13 +96,12 @@
     };
 
     psa_outvec out_vec[] = {
-        { .base = &err,   .len = sizeof(err) },
         { .base = p_info, .len = sizeof(*p_info) }
     };
 
     handle = psa_connect(TFM_SST_GET_INFO_SID, TFM_SST_GET_INFO_VERSION);
     if (!PSA_HANDLE_IS_VALID(handle)) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec), out_vec,
@@ -110,63 +109,51 @@
 
     psa_close(handle);
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
-
-    return err;
+    return status;
 }
 
-psa_ps_status_t psa_ps_remove(psa_ps_uid_t uid)
+psa_status_t psa_ps_remove(psa_storage_uid_t uid)
 {
     psa_status_t status;
-    psa_ps_status_t err;
     psa_handle_t handle;
 
     psa_invec in_vec[] = {
         { .base = &uid, .len = sizeof(uid) }
     };
 
-    psa_outvec out_vec[] = {
-        { .base = &err, .len = sizeof(err) }
-    };
 
     handle = psa_connect(TFM_SST_REMOVE_SID, TFM_SST_REMOVE_VERSION);
     if (!PSA_HANDLE_IS_VALID(handle)) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec), out_vec,
-                      IOVEC_LEN(out_vec));
+    status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec),
+                      NULL, 0);
 
     psa_close(handle);
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
-
-    return err;
+    return status;
 }
 
-psa_ps_status_t psa_ps_create(psa_ps_uid_t uid, uint32_t size,
-                              psa_ps_create_flags_t create_flags)
+psa_status_t psa_ps_create(psa_storage_uid_t uid, size_t size,
+                           psa_storage_create_flags_t create_flags)
 {
     (void)uid;
     (void)size;
     (void)create_flags;
 
-    return PSA_PS_ERROR_NOT_SUPPORTED;
+    return PSA_ERROR_NOT_SUPPORTED;
 }
 
-psa_ps_status_t psa_ps_set_extended(psa_ps_uid_t uid, uint32_t data_offset,
-                                    uint32_t data_length, const void *p_data)
+psa_status_t psa_ps_set_extended(psa_storage_uid_t uid, size_t data_offset,
+                                 size_t data_length, const void *p_data)
 {
     (void)uid;
     (void)data_offset;
     (void)data_length;
     (void)p_data;
 
-    return PSA_PS_ERROR_NOT_SUPPORTED;
+    return PSA_ERROR_NOT_SUPPORTED;
 }
 
 uint32_t psa_ps_get_support(void)
diff --git a/secure_fw/services/secure_storage/crypto/sst_crypto_interface.c b/secure_fw/services/secure_storage/crypto/sst_crypto_interface.c
index c2d8325..d3480c3 100644
--- a/secure_fw/services/secure_storage/crypto/sst_crypto_interface.c
+++ b/secure_fw/services/secure_storage/crypto/sst_crypto_interface.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -25,15 +25,15 @@
 static psa_key_handle_t sst_key_handle;
 static uint8_t sst_crypto_iv_buf[SST_IV_LEN_BYTES];
 
-psa_ps_status_t sst_crypto_init(void)
+psa_status_t sst_crypto_init(void)
 {
     /* Currently, no initialisation is required. This may change if key
      * handling is changed.
      */
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_crypto_setkey(void)
+psa_status_t sst_crypto_setkey(void)
 {
     psa_status_t status;
     psa_key_handle_t huk_key_handle;
@@ -43,7 +43,7 @@
     /* Allocate a transient key handle for the storage key */
     status = psa_allocate_key(&sst_key_handle);
     if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Set the key policy for the storage key */
@@ -92,7 +92,7 @@
         goto release_sst_key;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 
 release_generator:
     (void)psa_generator_abort(&sst_key_generator);
@@ -103,20 +103,20 @@
 release_sst_key:
     (void)psa_destroy_key(sst_key_handle);
 
-    return PSA_PS_ERROR_OPERATION_FAILED;
+    return PSA_ERROR_GENERIC_ERROR;
 }
 
-psa_ps_status_t sst_crypto_destroykey(void)
+psa_status_t sst_crypto_destroykey(void)
 {
     psa_status_t status;
 
     /* Destroy the transient key */
     status = psa_destroy_key(sst_key_handle);
     if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
 void sst_crypto_set_iv(const union sst_crypto_t *crypto)
@@ -166,14 +166,14 @@
     (void)tfm_memcpy(crypto->ref.iv, sst_crypto_iv_buf, SST_IV_LEN_BYTES);
 }
 
-psa_ps_status_t sst_crypto_encrypt_and_tag(union sst_crypto_t *crypto,
-                                           const uint8_t *add,
-                                           size_t add_len,
-                                           const uint8_t *in,
-                                           size_t in_len,
-                                           uint8_t *out,
-                                           size_t out_size,
-                                           size_t *out_len)
+psa_status_t sst_crypto_encrypt_and_tag(union sst_crypto_t *crypto,
+                                        const uint8_t *add,
+                                        size_t add_len,
+                                        const uint8_t *in,
+                                        size_t in_len,
+                                        uint8_t *out,
+                                        size_t out_size,
+                                        size_t *out_len)
 {
     psa_status_t status;
 
@@ -183,24 +183,24 @@
                               in, in_len,
                               out, out_size, out_len);
     if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Copy the tag out of the output buffer */
     *out_len -= SST_TAG_LEN_BYTES;
     (void)tfm_memcpy(crypto->ref.tag, (out + *out_len), SST_TAG_LEN_BYTES);
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_crypto_auth_and_decrypt(const union sst_crypto_t *crypto,
-                                            const uint8_t *add,
-                                            size_t add_len,
-                                            uint8_t *in,
-                                            size_t in_len,
-                                            uint8_t *out,
-                                            size_t out_size,
-                                            size_t *out_len)
+psa_status_t sst_crypto_auth_and_decrypt(const union sst_crypto_t *crypto,
+                                         const uint8_t *add,
+                                         size_t add_len,
+                                         uint8_t *in,
+                                         size_t in_len,
+                                         uint8_t *out,
+                                         size_t out_size,
+                                         size_t *out_len)
 {
     psa_status_t status;
 
@@ -214,15 +214,15 @@
                               in, in_len,
                               out, out_size, out_len);
     if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_AUTH_FAILED;
+        return PSA_ERROR_INVALID_SIGNATURE;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_crypto_generate_auth_tag(union sst_crypto_t *crypto,
-                                             const uint8_t *add,
-                                             uint32_t add_len)
+psa_status_t sst_crypto_generate_auth_tag(union sst_crypto_t *crypto,
+                                          const uint8_t *add,
+                                          uint32_t add_len)
 {
     psa_status_t status;
     size_t out_len;
@@ -233,15 +233,15 @@
                               0, 0,
                               crypto->ref.tag, SST_TAG_LEN_BYTES, &out_len);
     if (status != PSA_SUCCESS || out_len != SST_TAG_LEN_BYTES) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_crypto_authenticate(const union sst_crypto_t *crypto,
-                                        const uint8_t *add,
-                                        uint32_t add_len)
+psa_status_t sst_crypto_authenticate(const union sst_crypto_t *crypto,
+                                     const uint8_t *add,
+                                     uint32_t add_len)
 {
     psa_status_t status;
     size_t out_len;
@@ -252,8 +252,8 @@
                               crypto->ref.tag, SST_TAG_LEN_BYTES,
                               0, 0, &out_len);
     if (status != PSA_SUCCESS || out_len != 0) {
-        return PSA_PS_ERROR_AUTH_FAILED;
+        return PSA_ERROR_INVALID_SIGNATURE;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
diff --git a/secure_fw/services/secure_storage/crypto/sst_crypto_interface.h b/secure_fw/services/secure_storage/crypto/sst_crypto_interface.h
index 2d8f89e..7b10b55 100644
--- a/secure_fw/services/secure_storage/crypto/sst_crypto_interface.h
+++ b/secure_fw/services/secure_storage/crypto/sst_crypto_interface.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -35,23 +35,23 @@
 /**
  * \brief Initializes the crypto engine.
  *
- * \return Returns values as described in \ref psa_ps_status_t
+ * \return Returns values as described in \ref psa_status_t
  */
-psa_ps_status_t sst_crypto_init(void);
+psa_status_t sst_crypto_init(void);
 
 /**
  * \brief Sets the key to use for crypto operations for the current client.
  *
- * \return Returns values as described in \ref psa_ps_status_t
+ * \return Returns values as described in \ref psa_status_t
  */
-psa_ps_status_t sst_crypto_setkey(void);
+psa_status_t sst_crypto_setkey(void);
 
 /**
  * \brief Destroys the transient key used for crypto operations.
  *
- * \return Returns values as described in \ref psa_ps_status_t
+ * \return Returns values as described in \ref psa_status_t
  */
-psa_ps_status_t sst_crypto_destroykey(void);
+psa_status_t sst_crypto_destroykey(void);
 
 /**
  * \brief Encrypts and tags the given plaintext data.
@@ -65,16 +65,16 @@
  * \param[in]     out_size  Size of the output buffer
  * \param[out]    out_len   On success, the length of the output data
  *
- * \return Returns values as described in \ref psa_ps_status_t
+ * \return Returns values as described in \ref psa_status_t
  */
-psa_ps_status_t sst_crypto_encrypt_and_tag(union sst_crypto_t *crypto,
-                                           const uint8_t *add,
-                                           size_t add_len,
-                                           const uint8_t *in,
-                                           size_t in_len,
-                                           uint8_t *out,
-                                           size_t out_size,
-                                           size_t *out_len);
+psa_status_t sst_crypto_encrypt_and_tag(union sst_crypto_t *crypto,
+                                        const uint8_t *add,
+                                        size_t add_len,
+                                        const uint8_t *in,
+                                        size_t in_len,
+                                        uint8_t *out,
+                                        size_t out_size,
+                                        size_t *out_len);
 
 /**
  * \brief Decrypts and authenticates the given encrypted data.
@@ -88,16 +88,16 @@
  * \param[in]  out_size  Size of the output buffer
  * \param[out] out_len   On success, the length of the output data
  *
- * \return Returns values as described in \ref psa_ps_status_t
+ * \return Returns values as described in \ref psa_status_t
  */
-psa_ps_status_t sst_crypto_auth_and_decrypt(const union sst_crypto_t *crypto,
-                                            const uint8_t *add,
-                                            size_t add_len,
-                                            uint8_t *in,
-                                            size_t in_len,
-                                            uint8_t *out,
-                                            size_t out_size,
-                                            size_t *out_len);
+psa_status_t sst_crypto_auth_and_decrypt(const union sst_crypto_t *crypto,
+                                         const uint8_t *add,
+                                         size_t add_len,
+                                         uint8_t *in,
+                                         size_t in_len,
+                                         uint8_t *out,
+                                         size_t out_size,
+                                         size_t *out_len);
 
 /**
  * \brief Generates authentication tag for given data.
@@ -106,11 +106,11 @@
  * \param[in]     add      Pointer to the data to authenticate
  * \param[in]     add_len  Length of the data to authenticate
  *
- * \return Returns values as described in \ref psa_ps_status_t
+ * \return Returns values as described in \ref psa_status_t
  */
-psa_ps_status_t sst_crypto_generate_auth_tag(union sst_crypto_t *crypto,
-                                             const uint8_t *add,
-                                             uint32_t add_len);
+psa_status_t sst_crypto_generate_auth_tag(union sst_crypto_t *crypto,
+                                          const uint8_t *add,
+                                          uint32_t add_len);
 
 /**
  * \brief Authenticate given data against the tag.
@@ -119,11 +119,11 @@
  * \param[in] add      Pointer to the data to authenticate
  * \param[in] add_len  Length of the data to authenticate
  *
- * \return Returns values as described in \ref psa_ps_status_t
+ * \return Returns values as described in \ref psa_status_t
  */
-psa_ps_status_t sst_crypto_authenticate(const union sst_crypto_t *crypto,
-                                        const uint8_t *add,
-                                        uint32_t add_len);
+psa_status_t sst_crypto_authenticate(const union sst_crypto_t *crypto,
+                                     const uint8_t *add,
+                                     uint32_t add_len);
 
 /**
  * \brief Provides current IV value to crypto layer.
diff --git a/secure_fw/services/secure_storage/flash/sst_flash.c b/secure_fw/services/secure_storage/flash/sst_flash.c
index ce8c1f0..e2b5600 100644
--- a/secure_fw/services/secure_storage/flash/sst_flash.c
+++ b/secure_fw/services/secure_storage/flash/sst_flash.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -48,100 +48,100 @@
 }
 
 #ifdef SST_RAM_FS
-static psa_ps_status_t flash_init(void)
+static psa_status_t flash_init(void)
 {
     /* Nothing needs to be done in case of Flash emulated in RAM */
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-static psa_ps_status_t flash_read(uint32_t flash_addr, uint32_t size,
-                                  uint8_t *buff)
+static psa_status_t flash_read(uint32_t flash_addr, uint32_t size,
+                               uint8_t *buff)
 {
     uint32_t idx = flash_addr - SST_FLASH_AREA_ADDR;
 
     (void)tfm_memcpy(buff, &block_data[idx], size);
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-static psa_ps_status_t flash_write(uint32_t flash_addr, uint32_t size,
-                                   const uint8_t *buff)
+static psa_status_t flash_write(uint32_t flash_addr, uint32_t size,
+                                const uint8_t *buff)
 {
     uint32_t idx = flash_addr - SST_FLASH_AREA_ADDR;
 
     (void)tfm_memcpy(&block_data[idx], buff, size);
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-static psa_ps_status_t flash_erase(uint32_t flash_addr)
+static psa_status_t flash_erase(uint32_t flash_addr)
 {
     uint32_t idx = flash_addr - SST_FLASH_AREA_ADDR;
 
     (void)tfm_memset(&block_data[idx], SST_FLASH_DEFAULT_VAL, SST_SECTOR_SIZE);
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 #else
-static psa_ps_status_t flash_init(void)
+static psa_status_t flash_init(void)
 {
     int32_t err;
 
     err = SST_FLASH_DEV_NAME.Initialize(NULL);
     if (err != ARM_DRIVER_OK) {
-        return PSA_PS_ERROR_STORAGE_FAILURE;
+        return PSA_ERROR_STORAGE_FAILURE;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-static psa_ps_status_t flash_read(uint32_t flash_addr, uint32_t size,
-                                  uint8_t *buff)
+static psa_status_t flash_read(uint32_t flash_addr, uint32_t size,
+                               uint8_t *buff)
 {
     int32_t err;
 
     err = SST_FLASH_DEV_NAME.ReadData(flash_addr, buff, size);
     if (err != ARM_DRIVER_OK) {
-        return PSA_PS_ERROR_STORAGE_FAILURE;
+        return PSA_ERROR_STORAGE_FAILURE;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-static psa_ps_status_t flash_write(uint32_t flash_addr, uint32_t size,
-                                   const uint8_t *buff)
+static psa_status_t flash_write(uint32_t flash_addr, uint32_t size,
+                                const uint8_t *buff)
 {
     int32_t err;
 
     err = SST_FLASH_DEV_NAME.ProgramData(flash_addr, buff, size);
     if (err != ARM_DRIVER_OK) {
-        return PSA_PS_ERROR_STORAGE_FAILURE;
+        return PSA_ERROR_STORAGE_FAILURE;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-static psa_ps_status_t flash_erase(uint32_t flash_addr)
+static psa_status_t flash_erase(uint32_t flash_addr)
 {
     int32_t err;
 
     err = SST_FLASH_DEV_NAME.EraseSector(flash_addr);
     if (err != ARM_DRIVER_OK) {
-        return PSA_PS_ERROR_STORAGE_FAILURE;
+        return PSA_ERROR_STORAGE_FAILURE;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 #endif /* SST_RAM_FS */
 
-psa_ps_status_t sst_flash_init(void)
+psa_status_t sst_flash_init(void)
 {
     return flash_init();
 }
 
-psa_ps_status_t sst_flash_read(uint32_t block_id, uint8_t *buff,
-                               uint32_t offset, uint32_t size)
+psa_status_t sst_flash_read(uint32_t block_id, uint8_t *buff,
+                            uint32_t offset, uint32_t size)
 {
     uint32_t flash_addr;
 
@@ -153,8 +153,8 @@
     return flash_read(flash_addr, size, buff);
 }
 
-psa_ps_status_t sst_flash_write(uint32_t block_id, const uint8_t *buff,
-                                uint32_t offset, uint32_t size)
+psa_status_t sst_flash_write(uint32_t block_id, const uint8_t *buff,
+                             uint32_t offset, uint32_t size)
 {
     uint32_t flash_addr;
 
@@ -166,13 +166,13 @@
     return flash_write(flash_addr, size, buff);
 }
 
-psa_ps_status_t sst_flash_block_to_block_move(uint32_t dst_block,
-                                              uint32_t dst_offset,
-                                              uint32_t src_block,
-                                              uint32_t src_offset,
-                                              uint32_t size)
+psa_status_t sst_flash_block_to_block_move(uint32_t dst_block,
+                                           uint32_t dst_offset,
+                                           uint32_t src_block,
+                                           uint32_t src_offset,
+                                           uint32_t size)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint8_t dst_block_data_copy[MAX_BLOCK_DATA_COPY];
     uint32_t dst_flash_addr;
     uint32_t src_flash_addr;
@@ -194,13 +194,13 @@
          * destination content.
          */
         err = flash_read(src_flash_addr, bytes_to_move, dst_block_data_copy);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return err;
         }
 
         /* Writes in flash the in-memory block content after modification */
         err = flash_write(dst_flash_addr, bytes_to_move, dst_block_data_copy);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return err;
         }
 
@@ -212,15 +212,15 @@
         dst_flash_addr += bytes_to_move;
     };
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_flash_erase_block(uint32_t block_id)
+psa_status_t sst_flash_erase_block(uint32_t block_id)
 {
     uint32_t flash_addr;
     uint32_t offset = BLOCK_START_OFFSET;
     uint32_t sectors_to_erase = SST_SECTORS_PER_BLOCK;
-    psa_ps_status_t status;
+    psa_status_t status;
 
     while (sectors_to_erase > 0) {
         /* Get the flash address defined by block ID and BLOCK_START_OFFSET
@@ -229,7 +229,7 @@
         flash_addr = get_phys_address(block_id, offset);
 
         status = flash_erase(flash_addr);
-        if (status != PSA_PS_SUCCESS) {
+        if (status != PSA_SUCCESS) {
             break;
         }
 
diff --git a/secure_fw/services/secure_storage/flash/sst_flash.h b/secure_fw/services/secure_storage/flash/sst_flash.h
index bdd3c36..a8e12ef 100644
--- a/secure_fw/services/secure_storage/flash/sst_flash.h
+++ b/secure_fw/services/secure_storage/flash/sst_flash.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -50,10 +50,10 @@
 /**
  * \brief  Initialize the Flash Interface.
  *
- * \return Returns PSA_PS_SUCCESS if the function is executed correctly.
- *         Otherwise, it returns PSA_PS_ERROR_STORAGE_FAILURE.
+ * \return Returns PSA_SUCCESS if the function is executed correctly.
+ *         Otherwise, it returns PSA_ERROR_STORAGE_FAILURE.
  */
-psa_ps_status_t sst_flash_init(void);
+psa_status_t sst_flash_init(void);
 
 /**
  * \brief Reads block data from the position specified by block ID and offset.
@@ -67,11 +67,11 @@
  *       the range of address, based on blockid + offset + size, are always
  *       valid in the memory.
  *
- * \return Returns PSA_PS_SUCCESS if the function is executed correctly.
- *         Otherwise, it returns PSA_PS_ERROR_STORAGE_FAILURE.
+ * \return Returns PSA_SUCCESS if the function is executed correctly.
+ *         Otherwise, it returns PSA_ERROR_STORAGE_FAILURE.
  */
-psa_ps_status_t sst_flash_read(uint32_t block_id, uint8_t *buff,
-                               uint32_t offset, uint32_t size);
+psa_status_t sst_flash_read(uint32_t block_id, uint8_t *buff,
+                            uint32_t offset, uint32_t size);
 
 /**
  * \brief Writes block data to the position specified by block ID and offset.
@@ -85,11 +85,11 @@
  *       the range of address, based on blockid + offset + size, are always
  *       valid in the memory.
  *
- * \return Returns PSA_PS_SUCCESS if the function is executed correctly.
- *         Otherwise, it returns PSA_PS_ERROR_STORAGE_FAILURE.
+ * \return Returns PSA_SUCCESS if the function is executed correctly.
+ *         Otherwise, it returns PSA_ERROR_STORAGE_FAILURE.
  */
-psa_ps_status_t sst_flash_write(uint32_t block_id, const uint8_t *buff,
-                                uint32_t offset, uint32_t size);
+psa_status_t sst_flash_write(uint32_t block_id, const uint8_t *buff,
+                             uint32_t offset, uint32_t size);
 
 /**
  * \brief Moves data from src block ID to destination block ID.
@@ -108,14 +108,14 @@
  *       It also considers that the destination block is already erased and
  *       ready to be written.
  *
- * \return Returns PSA_PS_SUCCESS if the function is executed correctly.
- *         Otherwise, it returns PSA_PS_ERROR_STORAGE_FAILURE.
+ * \return Returns PSA_SUCCESS if the function is executed correctly.
+ *         Otherwise, it returns PSA_ERROR_STORAGE_FAILURE.
  */
-psa_ps_status_t sst_flash_block_to_block_move(uint32_t dst_block,
-                                              uint32_t dst_offset,
-                                              uint32_t src_block,
-                                              uint32_t src_offset,
-                                              uint32_t size);
+psa_status_t sst_flash_block_to_block_move(uint32_t dst_block,
+                                           uint32_t dst_offset,
+                                           uint32_t src_block,
+                                           uint32_t src_offset,
+                                           uint32_t size);
 
 /**
  * \brief Erases block ID data.
@@ -124,10 +124,10 @@
  *
  * \note This function considers all input values valids.
  *
- * \return Returns PSA_PS_SUCCESS if the function is executed correctly.
- *         Otherwise, it returns PSA_PS_ERROR_STORAGE_FAILURE.
+ * \return Returns PSA_SUCCESS if the function is executed correctly.
+ *         Otherwise, it returns PSA_ERROR_STORAGE_FAILURE.
  */
-psa_ps_status_t sst_flash_erase_block(uint32_t block_id);
+psa_status_t sst_flash_erase_block(uint32_t block_id);
 
 #ifdef __cplusplus
 }
diff --git a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs.c b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs.c
index ce5d337..7ce0afe 100644
--- a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs.c
+++ b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -17,24 +17,24 @@
 
 #define SST_FLASH_FS_INIT_FILE 0
 
-static psa_ps_status_t sst_flash_fs_file_write_aligned_data(
+static psa_status_t sst_flash_fs_file_write_aligned_data(
                                         const struct sst_file_meta_t *file_meta,
                                         uint32_t offset,
                                         uint32_t size,
                                         const uint8_t *data)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t f_offset;
 
 #if (SST_FLASH_PROGRAM_UNIT != 1)
     /* Check if offset is aligned with SST_FLASH_PROGRAM_UNIT */
     if (GET_ALIGNED_FLASH_BYTES(offset) != offset) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     /* Check if size is aligned with SST_FLASH_PROGRAM_UNIT */
     if (GET_ALIGNED_FLASH_BYTES(size) != size) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 #endif /* (SST_FLASH_PROGRAM_UNIT != 1) */
 
@@ -46,65 +46,65 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_prepare(void)
+psa_status_t sst_flash_fs_prepare(void)
 {
     /* Initialize metadata block with the valid/active metablock */
     return sst_flash_fs_mblock_init();
 }
 
-psa_ps_status_t sst_flash_fs_wipe_all(void)
+psa_status_t sst_flash_fs_wipe_all(void)
 {
     /* Clean and initialize the metadata block */
     return sst_flash_fs_mblock_reset_metablock();
 }
 
-psa_ps_status_t sst_flash_fs_file_exist(uint32_t fid)
+psa_status_t sst_flash_fs_file_exist(uint32_t fid)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t idx;
 
     err = sst_flash_fs_mblock_get_file_idx(fid, &idx);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_flash_fs_file_create(uint32_t fid,
-                                         uint32_t max_size,
-                                         uint32_t data_size,
-                                         const uint8_t *data)
+psa_status_t sst_flash_fs_file_create(uint32_t fid,
+                                      uint32_t max_size,
+                                      uint32_t data_size,
+                                      const uint8_t *data)
 {
     struct sst_block_meta_t block_meta;
     uint32_t cur_phys_block;
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t idx;
     struct sst_file_meta_t file_meta;
 
     /* Check if file already exists */
     err = sst_flash_fs_mblock_get_file_idx(fid, &idx);
-    if (err == PSA_PS_SUCCESS) {
+    if (err == PSA_SUCCESS) {
         /* If it exits return an error as needs to be removed first */
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     /* Check if max_size is aligned with SST_FLASH_PROGRAM_UNIT */
     if (GET_ALIGNED_FLASH_BYTES(max_size) != max_size) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     /* Try to reserve an file based on the input parameters */
     err = sst_flash_fs_mblock_reserve_file(fid, max_size, &idx,
                                            &file_meta, &block_meta);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     /* Check if data needs to be stored in the new file */
     if (data_size != 0) {
         if ((data_size > max_size) || (data == NULL)) {
-            return PSA_PS_ERROR_INVALID_ARGUMENT;
+            return PSA_ERROR_INVALID_ARGUMENT;
         }
 
         /* Write the content into scratch data block */
@@ -112,16 +112,16 @@
                                                    SST_FLASH_FS_INIT_FILE,
                                                    data_size,
                                                    data);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
 
         /* Add current size the file metadata */
         file_meta.cur_size = data_size;
 
         err = sst_flash_fs_dblock_cp_remaining_data(&block_meta, &file_meta);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
 
         cur_phys_block = block_meta.phy_id;
@@ -138,20 +138,20 @@
     /* Update metadata block information */
     err = sst_flash_fs_mblock_update_scratch_block_meta(file_meta.lblock,
                                                         &block_meta);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Add file metadata in the metadata block */
     err = sst_flash_fs_mblock_update_scratch_file_meta(idx, &file_meta);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Copy rest of the file metadata entries */
     err = sst_flash_fs_mblock_cp_remaining_file_meta(idx);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* The file data in the logical block 0 is stored in same physical block
@@ -164,8 +164,8 @@
      */
     if ((file_meta.lblock != SST_LOGICAL_DBLOCK0) || (data_size == 0)) {
         err = sst_flash_fs_mblock_migrate_lb0_data_to_scratch();
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
     }
 
@@ -175,68 +175,68 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_file_get_info(uint32_t fid,
-                                           struct sst_file_info_t *info)
+psa_status_t sst_flash_fs_file_get_info(uint32_t fid,
+                                        struct sst_file_info_t *info)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t idx;
     struct sst_file_meta_t tmp_metadata;
 
     /* Get the meta data index */
     err = sst_flash_fs_mblock_get_file_idx(fid, &idx);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
     /* Read file metadata */
     err = sst_flash_fs_mblock_read_file_meta(idx, &tmp_metadata);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     /* Check if index is still referring to same file */
     if (fid != tmp_metadata.id) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
     info->size_max = tmp_metadata.max_size;
     info->size_current = tmp_metadata.cur_size;
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_flash_fs_file_write(uint32_t fid, uint32_t size,
-                                        uint32_t offset, const uint8_t *data)
+psa_status_t sst_flash_fs_file_write(uint32_t fid, uint32_t size,
+                                     uint32_t offset, const uint8_t *data)
 {
     struct sst_block_meta_t block_meta;
     uint32_t cur_phys_block;
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t idx;
     struct sst_file_meta_t file_meta;
 
     /* Get the file index */
     err = sst_flash_fs_mblock_get_file_idx(fid, &idx);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
     /* Read file metadata */
     err = sst_flash_fs_mblock_read_file_meta(idx, &file_meta);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
     /* Read block metadata */
     err = sst_flash_fs_mblock_read_block_metadata(file_meta.lblock,
                                                   &block_meta);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Write the content into scratch data block */
     err = sst_flash_fs_file_write_aligned_data(&file_meta, offset, size, data);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     if (size > file_meta.cur_size) {
@@ -245,8 +245,8 @@
     }
 
     err = sst_flash_fs_dblock_cp_remaining_data(&block_meta, &file_meta);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     cur_phys_block = block_meta.phy_id;
@@ -261,20 +261,20 @@
     /* Update block metadata in scratch metadata block */
     err = sst_flash_fs_mblock_update_scratch_block_meta(file_meta.lblock,
                                                         &block_meta);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Update file metadata to reflect new attributes */
     err = sst_flash_fs_mblock_update_scratch_file_meta(idx, &file_meta);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Copy rest of the file metadata entries */
     err = sst_flash_fs_mblock_cp_remaining_file_meta(idx);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* The file data in the logical block 0 is stored in same physical block
@@ -287,8 +287,8 @@
      */
     if (file_meta.lblock != SST_LOGICAL_DBLOCK0) {
         err = sst_flash_fs_mblock_migrate_lb0_data_to_scratch();
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
     }
 
@@ -300,13 +300,13 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_file_delete(uint32_t fid)
+psa_status_t sst_flash_fs_file_delete(uint32_t fid)
 {
     uint32_t del_file_data_idx;
     uint32_t del_file_lblock;
     uint32_t del_file_idx;
     uint32_t del_file_max_size;
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t src_offset = SST_BLOCK_SIZE;
     uint32_t nbr_bytes_to_move = 0;
     uint32_t idx;
@@ -314,17 +314,17 @@
 
     /* Get the file index */
     err = sst_flash_fs_mblock_get_file_idx(fid, &del_file_idx);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
     err = sst_flash_fs_mblock_read_file_meta(del_file_idx, &file_meta);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
-    if (sst_utils_validate_fid(file_meta.id) != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+    if (sst_utils_validate_fid(file_meta.id) != PSA_SUCCESS) {
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
     /* Save logical block, data_index and max_size to be used later on */
@@ -341,7 +341,7 @@
     /* Update file metadata in to the scratch block */
     err = sst_flash_fs_mblock_update_scratch_file_meta(del_file_idx,
                                                        &file_meta);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -354,7 +354,7 @@
 
         /* Read file meta for the given file index */
         err = sst_flash_fs_mblock_read_file_meta(idx, &file_meta);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return err;
         }
 
@@ -385,7 +385,7 @@
         }
         /* Update file metadata in to the scratch block */
         err = sst_flash_fs_mblock_update_scratch_file_meta(idx, &file_meta);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return err;
         }
     }
@@ -394,7 +394,7 @@
     err = sst_flash_fs_dblock_compact_block(del_file_lblock, del_file_max_size,
                                             src_offset, del_file_data_idx,
                                             nbr_bytes_to_move);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -408,8 +408,8 @@
      */
     if (del_file_lblock != SST_LOGICAL_DBLOCK0) {
         err = sst_flash_fs_mblock_migrate_lb0_data_to_scratch();
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
     }
 
@@ -421,41 +421,41 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_file_read(uint32_t fid, uint32_t size,
-                                       uint32_t offset, uint8_t *data)
+psa_status_t sst_flash_fs_file_read(uint32_t fid, uint32_t size,
+                                    uint32_t offset, uint8_t *data)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t idx;
     struct sst_file_meta_t tmp_metadata;
 
     /* Get the file index */
     err = sst_flash_fs_mblock_get_file_idx(fid, &idx);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
     /* Read file metadata */
     err = sst_flash_fs_mblock_read_file_meta(idx, &tmp_metadata);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Check if index is still referring to same file */
     if (fid != tmp_metadata.id) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
     /* Boundary check the incoming request */
     err = sst_utils_check_contained_in(tmp_metadata.cur_size, offset, size);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     /* Read the file from flash */
     err = sst_flash_fs_dblock_read_file(&tmp_metadata, offset, size, data);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
diff --git a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs.h b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs.h
index 4af3f99..b997b05 100644
--- a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs.h
+++ b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -38,27 +38,27 @@
 /**
  * \brief Prepares the filesystem to accept operations on the files.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_prepare(void);
+psa_status_t sst_flash_fs_prepare(void);
 
 /**
  * \brief Wipes all files from the filesystem.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_wipe_all(void);
+psa_status_t sst_flash_fs_wipe_all(void);
 
 /**
  * \brief Checks if a file exists in the filesystem.
  *
  * \param[in] fid  File ID
  *
- * \return Returns PSA_PS_SUCCESS if the file exists. If file does not
- *         exist, it returns PSA_PS_ERROR_UID_NOT_FOUND. Otherwise, it returns
- *         error code as specified in \ref psa_ps_status_t.
+ * \return Returns PSA_SUCCESS if the file exists. If file does not
+ *         exist, it returns PSA_ERROR_DOES_NOT_EXIST. Otherwise, it returns
+ *         error code as specified in \ref psa_status_t.
  */
-psa_ps_status_t sst_flash_fs_file_exist(uint32_t fid);
+psa_status_t sst_flash_fs_file_exist(uint32_t fid);
 
 /**
  * \brief Creates a file in the filesystem.
@@ -71,15 +71,15 @@
  *                       This parameter is set to NULL when the file is empty
  *                       after the creation.
  *
- * \return Returns PSA_PS_SUCCESS if the file has been created correctly.
+ * \return Returns PSA_SUCCESS if the file has been created correctly.
  *         If fid is in used, it returns PSA_PS_ERROR_INVALID_ARGUMENT.
  *         Otherwise, it returns error code as specified in
- *         \ref psa_ps_status_t.
+ *         \ref psa_status_t.
  */
-psa_ps_status_t sst_flash_fs_file_create(uint32_t fid,
-                                         uint32_t max_size,
-                                         uint32_t data_size,
-                                         const uint8_t *data);
+psa_status_t sst_flash_fs_file_create(uint32_t fid,
+                                      uint32_t max_size,
+                                      uint32_t data_size,
+                                      const uint8_t *data);
 
 /**
  * \brief Gets the file information referenced by the file ID.
@@ -88,10 +88,10 @@
  * \param[out] info  Pointer to the information structure to store the
  *                   file information values \ref sst_file_info_t
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_file_get_info(uint32_t fid,
-                                           struct sst_file_info_t *info);
+psa_status_t sst_flash_fs_file_get_info(uint32_t fid,
+                                        struct sst_file_info_t *info);
 
 /**
  * \brief Writes data to an existing file.
@@ -101,12 +101,12 @@
  * \param[in] offset  Offset in the file
  * \param[in] data    Pointer to buffer containing data to be written
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_file_write(uint32_t fid,
-                                        uint32_t size,
-                                        uint32_t offset,
-                                        const uint8_t *data);
+psa_status_t sst_flash_fs_file_write(uint32_t fid,
+                                     uint32_t size,
+                                     uint32_t offset,
+                                     const uint8_t *data);
 
 /**
  * \brief Reads data from an existing file.
@@ -116,21 +116,21 @@
  * \param[in]  offset  Offset in the file
  * \param[out] data    Pointer to buffer to store the data
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_file_read(uint32_t fid,
-                                       uint32_t size,
-                                       uint32_t offset,
-                                       uint8_t *data);
+psa_status_t sst_flash_fs_file_read(uint32_t fid,
+                                    uint32_t size,
+                                    uint32_t offset,
+                                    uint8_t *data);
 
 /**
  * \brief Deletes file referenced by the file ID.
  *
  * \param[in] fid  File ID
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_file_delete(uint32_t fid);
+psa_status_t sst_flash_fs_file_delete(uint32_t fid);
 
 #ifdef __cplusplus
 }
diff --git a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_dblock.c b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_dblock.c
index fa2e409..2cc2217 100644
--- a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_dblock.c
+++ b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_dblock.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -20,29 +20,29 @@
 static uint32_t sst_dblock_lo_to_phy(uint32_t lblock)
 {
     struct sst_block_meta_t block_meta;
-    psa_ps_status_t err;
+    psa_status_t err;
 
     err = sst_flash_fs_mblock_read_block_metadata(lblock, &block_meta);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return SST_BLOCK_INVALID_ID;
     }
 
     return block_meta.phy_id;
 }
 
-psa_ps_status_t sst_flash_fs_dblock_compact_block(uint32_t lblock,
-                                                  uint32_t free_size,
-                                                  uint32_t src_offset,
-                                                  uint32_t dst_offset,
-                                                  uint32_t size)
+psa_status_t sst_flash_fs_dblock_compact_block(uint32_t lblock,
+                                               uint32_t free_size,
+                                               uint32_t src_offset,
+                                               uint32_t dst_offset,
+                                               uint32_t size)
 {
     struct sst_block_meta_t block_meta;
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t scratch_id = 0;
 
     /* Read current block meta */
     err = sst_flash_fs_mblock_read_block_metadata(lblock, &block_meta);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -60,8 +60,8 @@
         err = sst_flash_block_to_block_move(scratch_id, dst_offset,
                                             block_meta.phy_id, src_offset,
                                             size);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
     }
 
@@ -74,8 +74,8 @@
                                             block_meta.phy_id,
                                             block_meta.data_start,
                                             (dst_offset-block_meta.data_start));
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
     }
 
@@ -90,7 +90,7 @@
 
     /* Update block metadata in scratch metadata block */
     err = sst_flash_fs_mblock_update_scratch_block_meta(lblock, &block_meta);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         /* Swap back the data block as there was an issue in the process */
         sst_flash_fs_mblock_set_data_scratch(scratch_id, lblock);
         return err;
@@ -99,9 +99,9 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_dblock_cp_data_to_scratch(uint32_t lblock,
-                                                       uint32_t offset,
-                                                       uint32_t size)
+psa_status_t sst_flash_fs_dblock_cp_data_to_scratch(uint32_t lblock,
+                                                    uint32_t offset,
+                                                    uint32_t size)
 {
     uint32_t phys_block;
     uint32_t scratch_id;
@@ -109,7 +109,7 @@
     /* Get physical block ID from where to read the data */
     phys_block = sst_dblock_lo_to_phy(lblock);
     if (phys_block == SST_BLOCK_INVALID_ID) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Get the scratch data block ID to write the data */
@@ -121,17 +121,17 @@
                                          size);
 }
 
-psa_ps_status_t sst_flash_fs_dblock_read_file(struct sst_file_meta_t *file_meta,
-                                              uint32_t offset,
-                                              uint32_t size,
-                                              uint8_t *buf)
+psa_status_t sst_flash_fs_dblock_read_file(struct sst_file_meta_t *file_meta,
+                                           uint32_t offset,
+                                           uint32_t size,
+                                           uint8_t *buf)
 {
     uint32_t phys_block;
     uint32_t pos;
 
     phys_block = sst_dblock_lo_to_phy(file_meta->lblock);
     if (phys_block == SST_BLOCK_INVALID_ID) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     pos = (file_meta->data_idx + offset);
@@ -139,10 +139,10 @@
     return sst_flash_read(phys_block, buf, pos, size);
 }
 
-psa_ps_status_t sst_flash_fs_dblock_write_file(uint32_t lblock,
-                                               uint32_t offset,
-                                               uint32_t size,
-                                               const uint8_t *data)
+psa_status_t sst_flash_fs_dblock_write_file(uint32_t lblock,
+                                            uint32_t offset,
+                                            uint32_t size,
+                                            const uint8_t *data)
 {
     uint32_t scratch_id;
 
@@ -151,12 +151,12 @@
     return sst_flash_write(scratch_id, data, offset, size);
 }
 
-psa_ps_status_t sst_flash_fs_dblock_cp_remaining_data(
+psa_status_t sst_flash_fs_dblock_cp_remaining_data(
                                       const struct sst_block_meta_t *block_meta,
                                       const struct sst_file_meta_t *file_meta)
 {
     uint32_t after_file_offset;
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t scratch_id;
     uint32_t wrt_bytes;
 
@@ -171,7 +171,7 @@
                                             block_meta->phy_id,
                                             block_meta->data_start,
                                             wrt_bytes);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return err;
         }
 
diff --git a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_dblock.h b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_dblock.h
index 4ba4ea5..a231cae 100644
--- a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_dblock.h
+++ b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_dblock.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -27,13 +27,13 @@
  *                        data position to store the data to be reallocated
  * \param[in] size        Number of bytes to be reallocated
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_dblock_compact_block(uint32_t lblock,
-                                                  uint32_t free_size,
-                                                  uint32_t src_offset,
-                                                  uint32_t dst_offset,
-                                                  uint32_t size);
+psa_status_t sst_flash_fs_dblock_compact_block(uint32_t lblock,
+                                               uint32_t free_size,
+                                               uint32_t src_offset,
+                                               uint32_t dst_offset,
+                                               uint32_t size);
 
 /**
  * \brief Copies data from logical block to scratch data block.
@@ -44,11 +44,11 @@
  * \param[in] size        Number of bytes to be copied from logical block to
  *                        scratch data block
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_dblock_cp_data_to_scratch(uint32_t lblock,
-                                                       uint32_t offset,
-                                                       uint32_t size);
+psa_status_t sst_flash_fs_dblock_cp_data_to_scratch(uint32_t lblock,
+                                                    uint32_t offset,
+                                                    uint32_t size);
 
 /**
  * \brief Reads the file content.
@@ -58,12 +58,12 @@
  * \param[in]  size      Size to be read
  * \param[out] buf       Buffer pointer to store the data
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_dblock_read_file(struct sst_file_meta_t *file_meta,
-                                              uint32_t offset,
-                                              uint32_t size,
-                                              uint8_t *buf);
+psa_status_t sst_flash_fs_dblock_read_file(struct sst_file_meta_t *file_meta,
+                                           uint32_t offset,
+                                           uint32_t size,
+                                           uint8_t *buf);
 
 /**
  * \brief Writes scratch data block content with requested data
@@ -76,12 +76,12 @@
  * \param[in] data        Pointer to data buffer to copy in the scratch data
  *                        block
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_dblock_write_file(uint32_t lblock,
-                                               uint32_t offset,
-                                               uint32_t size,
-                                               const uint8_t *data);
+psa_status_t sst_flash_fs_dblock_write_file(uint32_t lblock,
+                                            uint32_t offset,
+                                            uint32_t size,
+                                            const uint8_t *data);
 
 /**
  * \brief Writes logical block data, which is not related with the file
@@ -90,9 +90,9 @@
  * \param[in] block_meta  Pointer to block meta to process
  * \param[in] file_meta   Pointer to file's metadata manipulated
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_dblock_cp_remaining_data(
+psa_status_t sst_flash_fs_dblock_cp_remaining_data(
                                      const struct sst_block_meta_t *block_meta,
                                      const struct sst_file_meta_t *file_meta);
 #ifdef __cplusplus
diff --git a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_mblock.c b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_mblock.c
index 8365b2d..851bd2e 100644
--- a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_mblock.c
+++ b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_mblock.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -275,42 +275,42 @@
  *
  * \param[in] file_meta  Pointer to file meta structure
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
 __attribute__((always_inline))
-__STATIC_INLINE psa_ps_status_t sst_mblock_validate_file_meta(
+__STATIC_INLINE psa_status_t sst_mblock_validate_file_meta(
                                         const struct sst_file_meta_t *file_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Logical block ID can not be bigger or equal than number of
      * active blocks.
      */
     if (file_meta->lblock >= SST_NUM_ACTIVE_DBLOCKS) {
-        return PSA_PS_ERROR_DATA_CORRUPT;
+        return PSA_ERROR_DATA_CORRUPT;
     }
 
     /* meta->id can be 0 if the file is not in use. If it is in
      * use, check the metadata.
      */
-    if (sst_utils_validate_fid(file_meta->id) == PSA_PS_SUCCESS) {
+    if (sst_utils_validate_fid(file_meta->id) == PSA_SUCCESS) {
         /* validate files values if file is in use */
         if (file_meta->max_size > SST_MAX_OBJECT_SIZE) {
-            return PSA_PS_ERROR_DATA_CORRUPT;
+            return PSA_ERROR_DATA_CORRUPT;
         }
 
         /* The current file data size must be smaller or equal than
          * file data max size.
          */
         if (file_meta->cur_size > file_meta->max_size) {
-            return PSA_PS_ERROR_DATA_CORRUPT;
+            return PSA_ERROR_DATA_CORRUPT;
         }
 
         if (file_meta->lblock == SST_LOGICAL_DBLOCK0) {
             /* In block 0, data index must be located after the metadata */
             if (file_meta->data_idx <
                 sst_mblock_file_meta_offset(SST_MAX_NUM_OBJECTS)) {
-                return PSA_PS_ERROR_DATA_CORRUPT;
+                return PSA_ERROR_DATA_CORRUPT;
             }
         }
 
@@ -318,12 +318,12 @@
         err = sst_utils_check_contained_in(SST_BLOCK_SIZE,
                                            file_meta->data_idx,
                                            file_meta->max_size);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_DATA_CORRUPT;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_DATA_CORRUPT;
         }
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
 /**
@@ -333,18 +333,18 @@
  *
  * \param[in] block_meta  Pointer to block meta structure
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
 __attribute__((always_inline))
-__STATIC_INLINE psa_ps_status_t sst_mblock_validate_block_meta(
+__STATIC_INLINE psa_status_t sst_mblock_validate_block_meta(
                                       const struct sst_block_meta_t *block_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     /* Data block's data start at position 0 */
     uint32_t valid_data_start_value = 0;
 
     if (block_meta->phy_id >= SST_TOTAL_NUM_OF_BLOCKS) {
-        return PSA_PS_ERROR_DATA_CORRUPT;
+        return PSA_ERROR_DATA_CORRUPT;
     }
 
     /* Boundary check: block data start + free size can not be bigger
@@ -353,8 +353,8 @@
     err = sst_utils_check_contained_in(SST_BLOCK_SIZE,
                                        block_meta->data_start,
                                        block_meta->free_size);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_DATA_CORRUPT;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_DATA_CORRUPT;
     }
 
     if (block_meta->phy_id == SST_METADATA_BLOCK0 ||
@@ -368,10 +368,10 @@
     }
 
     if (block_meta->data_start != valid_data_start_value) {
-        return PSA_PS_ERROR_DATA_CORRUPT;
+        return PSA_ERROR_DATA_CORRUPT;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 #endif
 
@@ -382,20 +382,20 @@
  */
 static uint32_t sst_get_free_file_index(void)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t i;
     struct sst_file_meta_t tmp_metadata;
 
     for (i = 0; i < SST_MAX_NUM_OBJECTS; i++) {
         err = sst_flash_fs_mblock_read_file_meta(i, &tmp_metadata);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return SST_METADATA_INVALID_INDEX;
         }
 
         /* Check if this entry is free by checking if ID values is an
          * invalid ID.
          */
-        if (sst_utils_validate_fid(tmp_metadata.id) != PSA_PS_SUCCESS) {
+        if (sst_utils_validate_fid(tmp_metadata.id) != PSA_SUCCESS) {
             /* Found */
             return i;
         }
@@ -410,12 +410,12 @@
  * \param[in] idx        File metadata entry index in the metadata table
  * \param[in] file_meta  Metadata pointer
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_mblock_update_scratch_file_meta(uint32_t idx,
+static psa_status_t sst_mblock_update_scratch_file_meta(uint32_t idx,
                                              struct sst_file_meta_t *file_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t pos;
     uint32_t scratch_block;
 
@@ -431,9 +431,9 @@
 /**
  * \brief Erases data and meta scratch blocks.
  */
-static psa_ps_status_t sst_mblock_erase_scratch_blocks(void)
+static psa_status_t sst_mblock_erase_scratch_blocks(void)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t scratch_datablock;
     uint32_t scratch_metablock;
 
@@ -444,7 +444,7 @@
      * metadata scratch block is erased before data block.
      */
     err = sst_flash_erase_block(scratch_metablock);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -469,12 +469,12 @@
  * \param[in] block_meta  Pointer to the block metadata data to write in the
  *                        scratch block
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_mblock_update_scratch_block_meta(uint32_t lblock,
+static psa_status_t sst_mblock_update_scratch_block_meta(uint32_t lblock,
                                             struct sst_block_meta_t *block_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t meta_block;
     uint32_t pos;
 
@@ -491,12 +491,12 @@
  *
  * \param[in] lblock  Logical block number to skip
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_mblock_copy_remaining_block_meta(uint32_t lblock)
+static psa_status_t sst_mblock_copy_remaining_block_meta(uint32_t lblock)
 {
     struct sst_block_meta_t block_meta;
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t meta_block;
     uint32_t pos;
     uint32_t scratch_block;
@@ -516,8 +516,8 @@
          */
         err = sst_flash_fs_mblock_read_block_metadata(SST_LOGICAL_DBLOCK0,
                                                       &block_meta);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
 
         /* Update physical ID for logical block 0 to match with the
@@ -526,8 +526,8 @@
         block_meta.phy_id = scratch_block;
         err = sst_mblock_update_scratch_block_meta(SST_LOGICAL_DBLOCK0,
                                                    &block_meta);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
 
         /* Copy the rest of metadata blocks between logical block 0 and
@@ -542,7 +542,7 @@
             /* Data before updated content */
             err = sst_flash_block_to_block_move(scratch_block, pos, meta_block,
                                                 pos, size);
-            if (err != PSA_PS_SUCCESS) {
+            if (err != PSA_SUCCESS) {
                 return err;
             }
         }
@@ -564,13 +564,12 @@
  *
  * \param[in] swap_count  Swap count to validate
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
 __attribute__((always_inline))
-__STATIC_INLINE psa_ps_status_t sst_mblock_validate_swap_count(
-                                                             uint8_t swap_count)
+__STATIC_INLINE psa_status_t sst_mblock_validate_swap_count(uint8_t swap_count)
 {
-    psa_ps_status_t err = PSA_PS_SUCCESS;
+    psa_status_t err = PSA_SUCCESS;
 
     /* When a flash block is erased, the default value
      * is usually 0xFF (i.e. all 1s). Since the swap count
@@ -585,7 +584,7 @@
      * back to previous metablock instead.
      */
     if (swap_count == SST_FLASH_DEFAULT_VAL) {
-        err = PSA_PS_ERROR_OPERATION_FAILED;
+        err = PSA_ERROR_GENERIC_ERROR;
     }
 
     return err;
@@ -596,19 +595,18 @@
  *
  * \param[in] fs_version  File system version.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
 __attribute__((always_inline))
-__STATIC_INLINE psa_ps_status_t sst_mblock_validate_fs_version(
-                                                             uint8_t fs_version)
+__STATIC_INLINE psa_status_t sst_mblock_validate_fs_version(uint8_t fs_version)
 {
-    psa_ps_status_t err = PSA_PS_SUCCESS;
+    psa_status_t err = PSA_SUCCESS;
 
     /* Looks for exact version number.
      * FIXME: backward compatibility could be considered in future revisions.
      */
     if (fs_version != SST_SUPPORTED_VERSION) {
-        err = PSA_PS_ERROR_OPERATION_FAILED;
+        err = PSA_ERROR_GENERIC_ERROR;
     }
 
     return err;
@@ -621,15 +619,15 @@
  *
  * \param[in] h_meta  Pointer to metadata block header
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_mblock_validate_header_meta(
+static psa_status_t sst_mblock_validate_header_meta(
                                      struct sst_metadata_block_header_t *h_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     err = sst_mblock_validate_fs_version(h_meta->fs_version);
-    if (err == PSA_PS_SUCCESS) {
+    if (err == PSA_SUCCESS) {
         err = sst_mblock_validate_swap_count(h_meta->active_swap_count);
     }
 
@@ -639,11 +637,11 @@
 /**
  * \brief Writes the scratch metadata's header.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_mblock_write_scratch_meta_header(void)
+static psa_status_t sst_mblock_write_scratch_meta_header(void)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t scratch_metablock;
 
     scratch_metablock = sst_cur_meta_scratch_id();
@@ -653,7 +651,7 @@
 
     err = sst_mblock_validate_swap_count(
                         sst_flash_fs_ctx.meta_block_header.active_swap_count);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         /* Reset the swap count to 0 */
         sst_flash_fs_ctx.meta_block_header.active_swap_count = 0;
     }
@@ -669,16 +667,16 @@
 /**
  * \brief Reads the active metadata block header into sst_system_ctx.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_mblock_read_meta_header(void)
+static psa_status_t sst_mblock_read_meta_header(void)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     err = sst_flash_read(sst_flash_fs_ctx.active_metablock,
                          (uint8_t *)&sst_flash_fs_ctx.meta_block_header, 0,
                          SST_BLOCK_META_HEADER_SIZE);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -695,19 +693,19 @@
  * \param[out] file_meta    File metadata entry
  * \param[out] block_meta   Block metadata entry
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_mblock_reserve_file(uint32_t fid, uint32_t size,
+static psa_status_t sst_mblock_reserve_file(uint32_t fid, uint32_t size,
                                           struct sst_file_meta_t *file_meta,
                                           struct sst_block_meta_t *block_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t i;
 
     for (i = 0; i < SST_NUM_ACTIVE_DBLOCKS; i++) {
         err = sst_flash_fs_mblock_read_block_metadata(i, block_meta);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
 
         if (block_meta->free_size >= size) {
@@ -720,23 +718,23 @@
 
             /* Update block metadata */
             block_meta->free_size -= size;
-            return PSA_PS_SUCCESS;
+            return PSA_SUCCESS;
         }
     }
 
     /* No block has large enough space to fit the requested file */
-    return PSA_PS_ERROR_INSUFFICIENT_SPACE;
+    return PSA_ERROR_INSUFFICIENT_STORAGE;
 }
 
 /**
  * \brief Validates and find the valid-active metablock
  *
- * \return Returns value as specified in \ref psa_ps_status_t
+ * \return Returns value as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_init_get_active_metablock(void)
+static psa_status_t sst_init_get_active_metablock(void)
 {
     uint32_t cur_meta_block = SST_BLOCK_INVALID_ID;
-    psa_ps_status_t err;
+    psa_status_t err;
     struct sst_metadata_block_header_t h_meta0;
     struct sst_metadata_block_header_t h_meta1;
     uint8_t num_valid_meta_blocks = 0;
@@ -746,13 +744,13 @@
     /* Read the header of both the metdata blocks */
     err = sst_flash_read(SST_METADATA_BLOCK0, (uint8_t *)&h_meta0,
                          0, SST_BLOCK_META_HEADER_SIZE);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     err = sst_flash_read(SST_METADATA_BLOCK1, (uint8_t *)&h_meta1,
                          0, SST_BLOCK_META_HEADER_SIZE);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -761,12 +759,12 @@
      * update operation to complete. Need to find out the valid
      * metadata block now.
      */
-    if (sst_mblock_validate_header_meta(&h_meta0) == PSA_PS_SUCCESS) {
+    if (sst_mblock_validate_header_meta(&h_meta0) == PSA_SUCCESS) {
         num_valid_meta_blocks++;
         cur_meta_block = SST_METADATA_BLOCK0;
     }
 
-    if (sst_mblock_validate_header_meta(&h_meta1) == PSA_PS_SUCCESS) {
+    if (sst_mblock_validate_header_meta(&h_meta1) == PSA_SUCCESS) {
         num_valid_meta_blocks++;
         cur_meta_block = SST_METADATA_BLOCK1;
     }
@@ -778,18 +776,18 @@
     if (num_valid_meta_blocks > 1) {
         cur_meta_block = sst_mblock_latest_meta_block(&h_meta0, &h_meta1);
     } else if (num_valid_meta_blocks == 0) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     sst_flash_fs_ctx.active_metablock = cur_meta_block;
     sst_flash_fs_ctx.scratch_metablock = SST_OTHER_META_BLOCK(cur_meta_block);
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_cp_remaining_file_meta(uint32_t idx)
+psa_status_t sst_flash_fs_mblock_cp_remaining_file_meta(uint32_t idx)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t end;
     uint32_t meta_block;
     uint32_t pos;
@@ -803,7 +801,7 @@
     /* Data before updated content */
     err = sst_flash_block_to_block_move(scratch_block, pos, meta_block, pos,
                                         (idx * SST_FILE_METADATA_SIZE));
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -832,47 +830,47 @@
     return sst_flash_fs_ctx.meta_block_header.scratch_dblock;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_get_file_idx(uint32_t fid, uint32_t *idx)
+psa_status_t sst_flash_fs_mblock_get_file_idx(uint32_t fid, uint32_t *idx)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t i;
     struct sst_file_meta_t tmp_metadata;
 
     for (i = 0; i < SST_MAX_NUM_OBJECTS; i++) {
         err = sst_flash_fs_mblock_read_file_meta(i, &tmp_metadata);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
 
         /* ID with value 0x00 means end of file meta section */
         if (tmp_metadata.id == fid) {
             /* Found */
             *idx = i;
-            return PSA_PS_SUCCESS;
+            return PSA_SUCCESS;
         }
     }
 
-    return PSA_PS_ERROR_UID_NOT_FOUND;
+    return PSA_ERROR_DOES_NOT_EXIST;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_init(void)
+psa_status_t sst_flash_fs_mblock_init(void)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Initialize Flash Interface */
     err = sst_flash_init();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     err = sst_init_get_active_metablock();
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     err = sst_mblock_read_meta_header();
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Erase the other scratch metadata block */
@@ -881,13 +879,13 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_meta_update_finalize(void)
+psa_status_t sst_flash_fs_mblock_meta_update_finalize(void)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Write the metadata block header to flash */
     err = sst_mblock_write_scratch_meta_header();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -900,12 +898,12 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_migrate_lb0_data_to_scratch(void)
+psa_status_t sst_flash_fs_mblock_migrate_lb0_data_to_scratch(void)
 {
     struct sst_block_meta_t block_meta;
     uint32_t current_metablock;
     uint32_t data_size;
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t scratch_metablock;
 
     scratch_metablock = sst_cur_meta_scratch_id();
@@ -913,7 +911,7 @@
 
     err = sst_flash_fs_mblock_read_block_metadata(SST_LOGICAL_DBLOCK0,
                                                   &block_meta);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -929,10 +927,10 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_read_file_meta(uint32_t idx,
+psa_status_t sst_flash_fs_mblock_read_file_meta(uint32_t idx,
                                              struct sst_file_meta_t *file_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t offset;
 
     offset = sst_mblock_file_meta_offset(idx);
@@ -941,7 +939,7 @@
                          SST_FILE_METADATA_SIZE);
 
 #ifdef SST_VALIDATE_METADATA_FROM_FLASH
-    if (err == PSA_PS_SUCCESS) {
+    if (err == PSA_SUCCESS) {
         err = sst_mblock_validate_file_meta(file_meta);
     }
 #endif
@@ -949,10 +947,10 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_read_block_metadata(uint32_t lblock,
+psa_status_t sst_flash_fs_mblock_read_block_metadata(uint32_t lblock,
                                             struct sst_block_meta_t *block_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t metablock;
     uint32_t pos;
 
@@ -962,7 +960,7 @@
                          pos, SST_BLOCK_METADATA_SIZE);
 
 #ifdef SST_VALIDATE_METADATA_FROM_FLASH
-    if (err == PSA_PS_SUCCESS) {
+    if (err == PSA_SUCCESS) {
         err = sst_mblock_validate_block_meta(block_meta);
     }
 #endif
@@ -970,28 +968,28 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_reserve_file(uint32_t fid, uint32_t size,
+psa_status_t sst_flash_fs_mblock_reserve_file(uint32_t fid, uint32_t size,
                                             uint32_t *idx,
                                             struct sst_file_meta_t *file_meta,
                                             struct sst_block_meta_t *block_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     err = sst_mblock_reserve_file(fid, size, file_meta, block_meta);
 
     *idx = sst_get_free_file_index();
-    if ((err != PSA_PS_SUCCESS) ||
+    if ((err != PSA_SUCCESS) ||
         (*idx == SST_METADATA_INVALID_INDEX)) {
-        return PSA_PS_ERROR_INSUFFICIENT_SPACE;
+        return PSA_ERROR_INSUFFICIENT_STORAGE;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_reset_metablock(void)
+psa_status_t sst_flash_fs_mblock_reset_metablock(void)
 {
     struct sst_block_meta_t block_meta;
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t i;
     uint32_t metablock_to_erase_first = SST_METADATA_BLOCK0;
     struct sst_file_meta_t file_metadata;
@@ -1000,17 +998,17 @@
      * ensure that the active metadata block is erased last to prevent rollback
      * in the case of a power failure between the two erases.
      */
-    if (sst_init_get_active_metablock() == PSA_PS_SUCCESS) {
+    if (sst_init_get_active_metablock() == PSA_SUCCESS) {
         metablock_to_erase_first = sst_flash_fs_ctx.scratch_metablock;
     }
 
     err = sst_flash_erase_block(metablock_to_erase_first);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     err = sst_flash_erase_block(SST_OTHER_META_BLOCK(metablock_to_erase_first));
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -1029,7 +1027,7 @@
     block_meta.phy_id = SST_METADATA_BLOCK0;
     err = sst_mblock_update_scratch_block_meta(SST_LOGICAL_DBLOCK0,
                                                &block_meta);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -1050,15 +1048,15 @@
     /* If an error is detected while erasing the flash, then return a
      * system error to abort core wipe process.
      */
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_STORAGE_FAILURE;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_STORAGE_FAILURE;
     }
 
     for (i = 0; i < SST_NUM_DEDICATED_DBLOCKS; i++) {
         block_meta.phy_id = i + SST_INIT_DBLOCK_START;
         err = sst_mblock_update_scratch_block_meta(i + 1, &block_meta);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
     }
 
@@ -1069,20 +1067,20 @@
         /* In the beginning phys id is same as logical id */
         /* Update file metadata to reflect new attributes */
         err = sst_mblock_update_scratch_file_meta(i, &file_metadata);
-        if (err != PSA_PS_SUCCESS) {
-            return PSA_PS_ERROR_OPERATION_FAILED;
+        if (err != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
     }
 
     err = sst_mblock_write_scratch_meta_header();
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Swap active and scratch metablocks */
     sst_mblock_swap_metablocks();
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
 void sst_flash_fs_mblock_set_data_scratch(uint32_t phy_id, uint32_t lblock)
@@ -1092,11 +1090,11 @@
     }
 }
 
-psa_ps_status_t sst_flash_fs_mblock_update_scratch_block_meta(
+psa_status_t sst_flash_fs_mblock_update_scratch_block_meta(
                                             uint32_t lblock,
                                             struct sst_block_meta_t *block_meta)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* If the file is the logical block 0, then update the physical ID to the
      * current scratch metadata block so that it is correct after the metadata
@@ -1107,8 +1105,8 @@
     }
 
     err = sst_mblock_update_scratch_block_meta(lblock, block_meta);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     err = sst_mblock_copy_remaining_block_meta(lblock);
@@ -1116,7 +1114,7 @@
     return err;
 }
 
-psa_ps_status_t sst_flash_fs_mblock_update_scratch_file_meta(uint32_t idx,
+psa_status_t sst_flash_fs_mblock_update_scratch_file_meta(uint32_t idx,
                                               struct sst_file_meta_t *file_meta)
 {
     return sst_mblock_update_scratch_file_meta(idx, file_meta);
diff --git a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_mblock.h b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_mblock.h
index bee15f9..c634081 100644
--- a/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_mblock.h
+++ b/secure_fw/services/secure_storage/flash_fs/sst_flash_fs_mblock.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -75,9 +75,9 @@
 /**
  * \brief Initializes metadata block with the valid/active metablock.
  *
- * \return Returns value as specified in \ref psa_ps_status_t
+ * \return Returns value as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_init(void);
+psa_status_t sst_flash_fs_mblock_init(void);
 
 /**
  * \brief Copies rest of the file metadata, except for the one pointed by
@@ -85,9 +85,9 @@
  *
  * \param[in] idx  File metadata entry index to skip
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_cp_remaining_file_meta(uint32_t idx);
+psa_status_t sst_flash_fs_mblock_cp_remaining_file_meta(uint32_t idx);
 
 /**
  * \brief Gets current scratch datablock physical ID.
@@ -104,9 +104,9 @@
  * \param[in]  fid  ID of the file
  * \param[out] idx  Index of the file metadata in the file system
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_get_file_idx(uint32_t fid, uint32_t *idx);
+psa_status_t sst_flash_fs_mblock_get_file_idx(uint32_t fid, uint32_t *idx);
 
 /**
  * \brief Finalizes an update operation.
@@ -114,7 +114,7 @@
  *
  * \return Returns offset value in metadata block
  */
-psa_ps_status_t sst_flash_fs_mblock_meta_update_finalize(void);
+psa_status_t sst_flash_fs_mblock_meta_update_finalize(void);
 
 /**
  * \brief Writes the files data area of logical block 0 into the scratch
@@ -126,9 +126,9 @@
  *       medadata block needs to be copied in the scratch block, unless
  *       the data of the file processed is located in the logical block 0.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_migrate_lb0_data_to_scratch(void);
+psa_status_t sst_flash_fs_mblock_migrate_lb0_data_to_scratch(void);
 
 /**
  * \brief Reads specified file metadata.
@@ -136,9 +136,9 @@
  * \param[in]  idx        File metadata entry index
  * \param[out] file_meta  Pointer to file meta structure
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_read_file_meta(uint32_t idx,
+psa_status_t sst_flash_fs_mblock_read_file_meta(uint32_t idx,
                                              struct sst_file_meta_t *file_meta);
 
 /**
@@ -147,9 +147,9 @@
  * \param[in]  lblock      Logical block number
  * \param[out] block_meta  Pointer to block meta structure
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_read_block_metadata(uint32_t lblock,
+psa_status_t sst_flash_fs_mblock_read_block_metadata(uint32_t lblock,
                                            struct sst_block_meta_t *block_meta);
 
 /**
@@ -161,9 +161,9 @@
  * \param[out] file_meta     File metadata entry
  * \param[out] block_meta    Block metadata entry
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_reserve_file(uint32_t file_id,
+psa_status_t sst_flash_fs_mblock_reserve_file(uint32_t file_id,
                                            uint32_t size,
                                            uint32_t *file_meta_idx,
                                            struct sst_file_meta_t *file_meta,
@@ -172,9 +172,9 @@
 /**
  * \brief Resets metablock by cleaning and initializing the metadatablock.
  *
- * \return Returns value as specified in \ref psa_ps_status_t
+ * \return Returns value as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_reset_metablock(void);
+psa_status_t sst_flash_fs_mblock_reset_metablock(void);
 
 /**
  * \brief Sets current data scratch block
@@ -190,9 +190,9 @@
  * \param[in] lblock      Logical block number
  * \param[in] block_meta  Pointer to block's metadata
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_update_scratch_block_meta(
+psa_status_t sst_flash_fs_mblock_update_scratch_block_meta(
                                            uint32_t lblock,
                                            struct sst_block_meta_t *block_meta);
 
@@ -202,9 +202,9 @@
  * \param[in] idx        File's index in the metadata table
  * \param[in] file_meta  Metadata pointer
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_flash_fs_mblock_update_scratch_file_meta(uint32_t idx,
+psa_status_t sst_flash_fs_mblock_update_scratch_file_meta(uint32_t idx,
                                             struct sst_file_meta_t *file_meta);
 
 #ifdef __cplusplus
diff --git a/secure_fw/services/secure_storage/nv_counters/sst_nv_counters.c b/secure_fw/services/secure_storage/nv_counters/sst_nv_counters.c
index df97c03..6d49efa 100644
--- a/secure_fw/services/secure_storage/nv_counters/sst_nv_counters.c
+++ b/secure_fw/services/secure_storage/nv_counters/sst_nv_counters.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -7,33 +7,33 @@
 
 #include "sst_nv_counters.h"
 
-psa_ps_status_t sst_init_nv_counter(void)
+psa_status_t sst_init_nv_counter(void)
 {
     enum tfm_plat_err_t err;
 
     err = tfm_plat_init_nv_counter();
     if (err != TFM_PLAT_ERR_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
-                                       uint32_t *val)
+psa_status_t sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
+                                 uint32_t *val)
 {
     enum tfm_plat_err_t err;
 
     err = tfm_plat_read_nv_counter(counter_id, SST_NV_COUNTER_SIZE,
                                    (uint8_t *)val);
     if (err != TFM_PLAT_ERR_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_increment_nv_counter(enum tfm_nv_counter_t counter_id)
+psa_status_t sst_increment_nv_counter(enum tfm_nv_counter_t counter_id)
 {
     enum tfm_plat_err_t err;
 
@@ -45,8 +45,8 @@
      */
     err = tfm_plat_increment_nv_counter(counter_id);
     if (err != TFM_PLAT_ERR_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
diff --git a/secure_fw/services/secure_storage/nv_counters/sst_nv_counters.h b/secure_fw/services/secure_storage/nv_counters/sst_nv_counters.h
index 2c3bfc1..3448413 100644
--- a/secure_fw/services/secure_storage/nv_counters/sst_nv_counters.h
+++ b/secure_fw/services/secure_storage/nv_counters/sst_nv_counters.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -33,10 +33,10 @@
 /**
  * \brief Initializes all non-volatile (NV) counters.
  *
- * \return  PSA_PS_SUCCESS if the initialization succeeds, otherwise
- *          PSA_PS_ERROR_OPERATION_FAILED
+ * \return  PSA_SUCCESS if the initialization succeeds, otherwise
+ *          PSA_ERROR_GENERIC_ERROR
  */
-psa_ps_status_t sst_init_nv_counter(void);
+psa_status_t sst_init_nv_counter(void);
 
 /**
  * \brief Reads the given non-volatile (NV) counter.
@@ -44,11 +44,11 @@
  * \param[in]  counter_id  NV counter ID.
  * \param[out] val         Pointer to store the current NV counter value.
  *
- * \return  PSA_PS_SUCCESS if the value is read correctly, otherwise
- *          PSA_PS_ERROR_OPERATION_FAILED
+ * \return  PSA_SUCCESS if the value is read correctly, otherwise
+ *          PSA_ERROR_GENERIC_ERROR
  */
-psa_ps_status_t sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
-                                    uint32_t *val);
+psa_status_t sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
+                                 uint32_t *val);
 
 /**
  * \brief Increments the given non-volatile (NV) counter.
@@ -56,9 +56,9 @@
  * \param[in] counter_id  NV counter ID.
  *
  * \return  If the counter is incremented correctly, it returns
- *          PSA_PS_SUCCESS. Otherwise, PSA_PS_ERROR_OPERATION_FAILED.
+ *          PSA_SUCCESS. Otherwise, PSA_ERROR_GENERIC_ERROR.
  */
-psa_ps_status_t sst_increment_nv_counter(enum tfm_nv_counter_t counter_id);
+psa_status_t sst_increment_nv_counter(enum tfm_nv_counter_t counter_id);
 
 #ifdef __cplusplus
 }
diff --git a/secure_fw/services/secure_storage/sst_encrypted_object.c b/secure_fw/services/secure_storage/sst_encrypted_object.c
index 0383ba4..f147ddf 100644
--- a/secure_fw/services/secure_storage/sst_encrypted_object.c
+++ b/secure_fw/services/secure_storage/sst_encrypted_object.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -46,18 +46,18 @@
  *                       is the one stored in the object table for the given
  *                       File ID.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_object_auth_decrypt(uint32_t fid,
-                                               uint32_t cur_size,
-                                               struct sst_object_t *obj)
+static psa_status_t sst_object_auth_decrypt(uint32_t fid,
+                                            uint32_t cur_size,
+                                            struct sst_object_t *obj)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint8_t *p_obj_data = (uint8_t *)&obj->header.info;
     size_t out_len;
 
     err = sst_crypto_setkey();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -76,9 +76,9 @@
                                       p_obj_data,
                                       sizeof(*obj) - sizeof(obj->header.crypto),
                                       &out_len);
-    if (err != PSA_PS_SUCCESS || out_len != cur_size) {
+    if (err != PSA_SUCCESS || out_len != cur_size) {
         (void)sst_crypto_destroykey();
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     return sst_crypto_destroykey();
@@ -93,18 +93,18 @@
  * \param[out] obj       Pointer to the object structure to authenticate and
  *                       fill in with the encrypted data.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_object_auth_encrypt(uint32_t fid,
-                                               uint32_t cur_size,
-                                               struct sst_object_t *obj)
+static psa_status_t sst_object_auth_encrypt(uint32_t fid,
+                                            uint32_t cur_size,
+                                            struct sst_object_t *obj)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint8_t *p_obj_data = (uint8_t *)&obj->header.info;
     size_t out_len;
 
     err = sst_crypto_setkey();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -125,9 +125,9 @@
                                      sst_crypto_buf,
                                      sizeof(sst_crypto_buf),
                                      &out_len);
-    if (err != PSA_PS_SUCCESS || out_len != cur_size) {
+    if (err != PSA_SUCCESS || out_len != cur_size) {
         (void)sst_crypto_destroykey();
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     (void)tfm_memcpy(p_obj_data, sst_crypto_buf, cur_size);
@@ -135,16 +135,15 @@
     return sst_crypto_destroykey();
 }
 
-psa_ps_status_t sst_encrypted_object_read(uint32_t fid,
-                                          struct sst_object_t *obj)
+psa_status_t sst_encrypted_object_read(uint32_t fid, struct sst_object_t *obj)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     struct sst_file_info_t file_info;
     uint32_t decrypt_size;
 
     /* Get the current size of the encrypted object */
     err = sst_flash_fs_file_get_info(fid, &file_info);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -152,7 +151,7 @@
     err = sst_flash_fs_file_read(fid, file_info.size_current,
                                  SST_OBJECT_START_POSITION,
                                  obj->header.crypto.ref.iv);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -162,17 +161,16 @@
 
     /* Decrypt the object data */
     err = sst_object_auth_decrypt(fid, decrypt_size, obj);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_encrypted_object_write(uint32_t fid,
-                                           struct sst_object_t *obj)
+psa_status_t sst_encrypted_object_write(uint32_t fid, struct sst_object_t *obj)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t wrt_size;
 
     wrt_size = SST_ENCRYPT_SIZE(obj->header.info.max_size) +
@@ -190,7 +188,7 @@
 
     /* Create an object in the object system */
     err = sst_flash_fs_file_create(fid, wrt_size, SST_EMPTY_OBJECT_SIZE, NULL);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -199,7 +197,7 @@
 
     /* Authenticate and encrypt the object */
     err = sst_object_auth_encrypt(fid, wrt_size, obj);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
diff --git a/secure_fw/services/secure_storage/sst_encrypted_object.h b/secure_fw/services/secure_storage/sst_encrypted_object.h
index ce72f16..eed82af 100644
--- a/secure_fw/services/secure_storage/sst_encrypted_object.h
+++ b/secure_fw/services/secure_storage/sst_encrypted_object.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -22,10 +22,10 @@
  * \param[in]  fid      File ID
  * \param[out] obj      Pointer to the object structure to fill in
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_encrypted_object_read(uint32_t fid,
-                                          struct sst_object_t *obj);
+psa_status_t sst_encrypted_object_read(uint32_t fid,
+                                       struct sst_object_t *obj);
 
 /**
  * \brief Creates and writes a new encrypted object based on the given
@@ -39,10 +39,10 @@
  *       internal copies. So, this object will contain the encrypted object
  *       stored in the flash.
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_encrypted_object_write(uint32_t fid,
-                                           struct sst_object_t *obj);
+psa_status_t sst_encrypted_object_write(uint32_t fid,
+                                        struct sst_object_t *obj);
 
 #ifdef __cplusplus
 }
diff --git a/secure_fw/services/secure_storage/sst_object_defs.h b/secure_fw/services/secure_storage/sst_object_defs.h
index 56aedf2..0a65bc2 100644
--- a/secure_fw/services/secure_storage/sst_object_defs.h
+++ b/secure_fw/services/secure_storage/sst_object_defs.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -26,7 +26,7 @@
 struct sst_object_info_t {
     uint32_t current_size; /*!< Current size of the object content in bytes */
     uint32_t max_size;     /*!< Maximum size of the object content in bytes */
-    psa_ps_create_flags_t create_flags; /*!< Object creation flags */
+    psa_storage_create_flags_t create_flags; /*!< Object creation flags */
 };
 
 /*!
diff --git a/secure_fw/services/secure_storage/sst_object_system.c b/secure_fw/services/secure_storage/sst_object_system.c
index 833fee3..c4bc527 100644
--- a/secure_fw/services/secure_storage/sst_object_system.c
+++ b/secure_fw/services/secure_storage/sst_object_system.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -39,9 +39,10 @@
  *
  */
 __attribute__ ((always_inline))
-__STATIC_INLINE void sst_init_empty_object(psa_ps_create_flags_t create_flags,
-                                           uint32_t size,
-                                           struct sst_object_t *obj)
+__STATIC_INLINE void sst_init_empty_object(
+                                        psa_storage_create_flags_t create_flags,
+                                        uint32_t size,
+                                        struct sst_object_t *obj)
 {
     /* Set all object data to 0 */
     (void)tfm_memset(obj, SST_DEFAULT_EMPTY_BUFF_VAL, SST_MAX_OBJECT_SIZE);
@@ -61,15 +62,15 @@
  *
  * \param[in] old_fid  Old file ID to remove.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_remove_old_data(uint32_t old_fid)
+static psa_status_t sst_remove_old_data(uint32_t old_fid)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Delete old object table from the persistent area */
     err = sst_object_table_delete_old_table();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -91,17 +92,17 @@
  *
  * \param[in] type  Read type as specified in \ref read_type_t
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_read_object(enum read_type_t type)
+static psa_status_t sst_read_object(enum read_type_t type)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Read object header */
     err = sst_flash_fs_file_read(g_obj_tbl_info.fid, SST_OBJECT_HEADER_SIZE,
                                  SST_OBJECT_START_POSITION,
                                  (uint8_t *)&g_sst_object.header);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -110,7 +111,7 @@
      */
     if (g_sst_object.header.fid != g_obj_tbl_info.fid ||
         g_sst_object.header.version != g_obj_tbl_info.version) {
-        err = PSA_PS_ERROR_DATA_CORRUPT;
+        err = PSA_ERROR_DATA_CORRUPT;
     }
 
     if (type == READ_ALL_OBJECT) {
@@ -120,7 +121,7 @@
                                          g_sst_object.header.info.current_size,
                                          SST_OBJECT_HEADER_SIZE,
                                          g_sst_object.data);
-            if (err != PSA_PS_SUCCESS) {
+            if (err != PSA_SUCCESS) {
                 return err;
             }
         }
@@ -135,11 +136,11 @@
  *
  * \param[in] wrt_size  Number of bytes to write
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_write_object(uint32_t wrt_size)
+static psa_status_t sst_write_object(uint32_t wrt_size)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t max_size = SST_OBJECT_SIZE(g_sst_object.header.info.max_size);
 
     /* Add object identification and increase object version */
@@ -158,12 +159,12 @@
 
 #endif /* !SST_ENCRYPTION */
 
-psa_ps_status_t sst_system_prepare(void)
+psa_status_t sst_system_prepare(void)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     err = sst_flash_fs_prepare();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -181,16 +182,17 @@
     return err;
 }
 
-psa_ps_status_t sst_object_read(psa_ps_uid_t uid, int32_t client_id,
-                                uint32_t offset, uint32_t size)
+psa_status_t sst_object_read(psa_storage_uid_t uid, int32_t client_id,
+                             uint32_t offset, uint32_t size,
+                             size_t* p_data_length)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Retrieve the object information from the object table if the object
      * exists.
      */
     err = sst_object_table_get_obj_tbl_info(uid, client_id, &g_obj_tbl_info);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -201,20 +203,24 @@
     /* Read object header */
     err = sst_read_object(READ_ALL_OBJECT);
 #endif
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
     /* Boundary check the incoming request */
-    err = sst_utils_check_contained_in(g_sst_object.header.info.current_size,
-                                       offset, size);
-    if (err != PSA_PS_SUCCESS) {
-        goto clear_data_and_return;
+    if (offset > g_sst_object.header.info.current_size) {
+       err = PSA_ERROR_INVALID_ARGUMENT;
+       goto clear_data_and_return;
     }
 
+    size = SST_UTILS_MIN(size,
+                         g_sst_object.header.info.current_size - offset);
+
     /* Copy the decrypted object data to the output buffer */
     sst_req_mngr_write_asset_data(g_sst_object.data + offset, size);
 
+    *p_data_length = size;
+
 clear_data_and_return:
     /* Remove data stored in the object before leaving the function */
     (void)tfm_memset(&g_sst_object, SST_DEFAULT_EMPTY_BUFF_VAL,
@@ -223,11 +229,11 @@
     return err;
 }
 
-psa_ps_status_t sst_object_create(psa_ps_uid_t uid, int32_t client_id,
-                                  psa_ps_create_flags_t create_flags,
-                                  uint32_t size)
+psa_status_t sst_object_create(psa_storage_uid_t uid, int32_t client_id,
+                               psa_storage_create_flags_t create_flags,
+                               uint32_t size)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t old_fid = SST_INVALID_FID;
     uint32_t fid_am_reserved = 1;
 
@@ -237,14 +243,14 @@
 
     /* Boundary check the incoming request */
     if (size > SST_MAX_ASSET_SIZE) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     /* Retrieve the object information from the object table if the object
      * exists.
      */
     err = sst_object_table_get_obj_tbl_info(uid, client_id, &g_obj_tbl_info);
-    if (err == PSA_PS_SUCCESS) {
+    if (err == PSA_SUCCESS) {
 #ifdef SST_ENCRYPTION
         /* Read the object */
         err = sst_encrypted_object_read(g_obj_tbl_info.fid, &g_sst_object);
@@ -252,7 +258,7 @@
         /* Read the object header */
         err = sst_read_object(READ_HEADER_ONLY);
 #endif
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             goto clear_data_and_return;
         }
 
@@ -260,8 +266,8 @@
          * be modified.
          */
         if (g_sst_object.header.info.create_flags
-            & PSA_PS_FLAG_WRITE_ONCE) {
-            err = PSA_PS_ERROR_WRITE_ONCE;
+            & PSA_STORAGE_FLAG_WRITE_ONCE) {
+            err = PSA_ERROR_NOT_PERMITTED;
             goto clear_data_and_return;
         }
 
@@ -271,7 +277,7 @@
 
         /* Save old file ID */
         old_fid = g_obj_tbl_info.fid;
-    } else if (err == PSA_PS_ERROR_UID_NOT_FOUND) {
+    } else if (err == PSA_ERROR_DOES_NOT_EXIST) {
         /* If the object does not exist, then initialize it based on the input
          * arguments and empty content. Requests 2 FIDs to prevent exhaustion.
          */
@@ -283,7 +289,7 @@
 
     /* Update the object data */
     err = sst_req_mngr_read_asset_data(g_sst_object.data, size);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
@@ -293,7 +299,7 @@
     /* Get new file ID */
     err = sst_object_table_get_free_fid(fid_am_reserved,
                                         &g_obj_tbl_info.fid);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
@@ -305,7 +311,7 @@
     /* Write g_sst_object */
     err = sst_write_object(wrt_size);
 #endif
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
@@ -313,7 +319,7 @@
      * store it in the persistent area.
      */
     err = sst_object_table_set_obj_tbl_info(uid, client_id, &g_obj_tbl_info);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         /* Remove new object as object table is not persistent and propagate
          * object table manipulation error.
          */
@@ -338,10 +344,10 @@
     return err;
 }
 
-psa_ps_status_t sst_object_write(psa_ps_uid_t uid, int32_t client_id,
-                                 uint32_t offset, uint32_t size)
+psa_status_t sst_object_write(psa_storage_uid_t uid, int32_t client_id,
+                              uint32_t offset, uint32_t size)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t old_fid;
 
 #ifndef SST_ENCRYPTION
@@ -352,7 +358,7 @@
      * exists.
      */
     err = sst_object_table_get_obj_tbl_info(uid, client_id, &g_obj_tbl_info);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -362,13 +368,13 @@
 #else
     err = sst_read_object(READ_ALL_OBJECT);
 #endif
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
     /* If the object has the write once flag set, then it cannot be modified. */
-    if (g_sst_object.header.info.create_flags & PSA_PS_FLAG_WRITE_ONCE) {
-        err = PSA_PS_ERROR_WRITE_ONCE;
+    if (g_sst_object.header.info.create_flags & PSA_STORAGE_FLAG_WRITE_ONCE) {
+        err = PSA_ERROR_NOT_PERMITTED;
         goto clear_data_and_return;
     }
 
@@ -376,20 +382,20 @@
      * being created in the object data.
      */
     if (offset > g_sst_object.header.info.current_size) {
-        err = PSA_PS_ERROR_OFFSET_INVALID;
+        err = PSA_ERROR_INVALID_ARGUMENT;
         goto clear_data_and_return;
     }
 
     /* Boundary check the incoming request */
     err = sst_utils_check_contained_in(g_sst_object.header.info.max_size,
                                        offset, size);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
     /* Update the object data */
     err = sst_req_mngr_read_asset_data(g_sst_object.data + offset, size);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
@@ -403,7 +409,7 @@
 
     /* Get new file ID */
     err = sst_object_table_get_free_fid(1, &g_obj_tbl_info.fid);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
@@ -415,7 +421,7 @@
     /* Write g_sst_object */
     err = sst_write_object(wrt_size);
 #endif
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
@@ -423,7 +429,7 @@
      * store it in the persistent area.
      */
     err = sst_object_table_set_obj_tbl_info(uid, client_id, &g_obj_tbl_info);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         /* Remove new object as object table is not persistent and propagate
          * object table manipulation error.
          */
@@ -443,16 +449,16 @@
     return err;
 }
 
-psa_ps_status_t sst_object_get_info(psa_ps_uid_t uid, int32_t client_id,
-                                    struct psa_ps_info_t *info)
+psa_status_t sst_object_get_info(psa_storage_uid_t uid, int32_t client_id,
+                                 struct psa_storage_info_t *info)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Retrieve the object information from the object table if the object
      * exists.
      */
     err = sst_object_table_get_obj_tbl_info(uid, client_id, &g_obj_tbl_info);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -461,7 +467,7 @@
 #else
     err = sst_read_object(READ_HEADER_ONLY);
 #endif
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
@@ -477,15 +483,15 @@
     return err;
 }
 
-psa_ps_status_t sst_object_delete(psa_ps_uid_t uid, int32_t client_id)
+psa_status_t sst_object_delete(psa_storage_uid_t uid, int32_t client_id)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Retrieve the object information from the object table if the object
      * exists.
      */
     err = sst_object_table_get_obj_tbl_info(uid, client_id, &g_obj_tbl_info);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -494,13 +500,13 @@
 #else
     err = sst_read_object(READ_HEADER_ONLY);
 #endif
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
     /* Check that the write once flag is not set */
-    if (g_sst_object.header.info.create_flags & PSA_PS_FLAG_WRITE_ONCE) {
-        err = PSA_PS_ERROR_WRITE_ONCE;
+    if (g_sst_object.header.info.create_flags & PSA_STORAGE_FLAG_WRITE_ONCE) {
+        err = PSA_ERROR_NOT_PERMITTED;
         goto clear_data_and_return;
     }
 
@@ -508,7 +514,7 @@
      * area.
      */
     err = sst_object_table_delete_object(uid, client_id);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         goto clear_data_and_return;
     }
 
@@ -523,9 +529,9 @@
     return err;
 }
 
-psa_ps_status_t sst_system_wipe_all(void)
+psa_status_t sst_system_wipe_all(void)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* This function may get called as a corrective action
      * if a system level security violation is detected.
@@ -535,12 +541,12 @@
      * moves to erasing the flash instead.
      */
     err = sst_flash_fs_wipe_all();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     err = sst_flash_fs_prepare();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
diff --git a/secure_fw/services/secure_storage/sst_object_system.h b/secure_fw/services/secure_storage/sst_object_system.h
index b6e677c..80ac10d 100644
--- a/secure_fw/services/secure_storage/sst_object_system.h
+++ b/secure_fw/services/secure_storage/sst_object_system.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -21,9 +21,9 @@
  *        structures.
  *        It identifies and validates the system metadata.
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_system_prepare(void);
+psa_status_t sst_system_prepare(void);
 
 /**
  * \brief Creates a new object with the provided UID and client ID.
@@ -33,11 +33,11 @@
  * \param[in] create_flags  Flags indicating the properties of the data
  * \param[in] size          Size of the contents of `data` in bytes
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_create(psa_ps_uid_t uid, int32_t client_id,
-                                  psa_ps_create_flags_t create_flags,
-                                  uint32_t size);
+psa_status_t sst_object_create(psa_storage_uid_t uid, int32_t client_id,
+                               psa_storage_create_flags_t create_flags,
+                               uint32_t size);
 
 /**
  * \brief Gets the data of the object with the provided UID and client ID.
@@ -47,10 +47,11 @@
  * \param[in]  offset     Offset in the object at which to begin the read
  * \param[in]  size       Size of the contents of `data` in bytes
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_read(psa_ps_uid_t uid, int32_t client_id,
-                                uint32_t offset, uint32_t size);
+psa_status_t sst_object_read(psa_storage_uid_t uid, int32_t client_id,
+                             uint32_t offset, uint32_t size,
+                             size_t* p_data_length);
 
 /**
  * \brief Writes data into the object with the provided UID and client ID.
@@ -60,10 +61,10 @@
  * \param[in] offset     Offset in the object at which to begin the write
  * \param[in] size       Size of the contents of `data` in bytes
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_write(psa_ps_uid_t uid, int32_t client_id,
-                                 uint32_t offset, uint32_t size);
+psa_status_t sst_object_write(psa_storage_uid_t uid, int32_t client_id,
+                              uint32_t offset, uint32_t size);
 
 /**
  * \brief Deletes the object with the provided UID and client ID.
@@ -71,9 +72,9 @@
  * \param[in] uid        Unique identifier for the data
  * \param[in] client_id  Identifier of the asset's owner (client)
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_delete(psa_ps_uid_t uid, int32_t client_id);
+psa_status_t sst_object_delete(psa_storage_uid_t uid, int32_t client_id);
 
 /**
  * \brief Gets the asset information for the object with the provided UID and
@@ -81,20 +82,20 @@
  *
  * \param[in]  uid        Unique identifier for the data
  * \param[in]  client_id  Identifier of the asset's owner (client)
- * \param[out] info       Pointer to the `psa_ps_info_t` struct that will be
- *                        populated with the metadata
+ * \param[out] info       Pointer to the `psa_storage_info_t` struct that will
+ *                        be populated with the metadata
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_get_info(psa_ps_uid_t uid, int32_t client_id,
-                                    struct psa_ps_info_t *info);
+psa_status_t sst_object_get_info(psa_storage_uid_t uid, int32_t client_id,
+                                 struct psa_storage_info_t *info);
 
 /**
  * \brief Wipes the secure storage system and all object data.
  *
- * \return Returns error code specified in \ref psa_ps_status_t
+ * \return Returns error code specified in \ref psa_status_t
  */
-psa_ps_status_t sst_system_wipe_all(void);
+psa_status_t sst_system_wipe_all(void);
 
 #ifdef __cplusplus
 }
diff --git a/secure_fw/services/secure_storage/sst_object_table.c b/secure_fw/services/secure_storage/sst_object_table.c
index 3c13b44..fe24b3d 100644
--- a/secure_fw/services/secure_storage/sst_object_table.c
+++ b/secure_fw/services/secure_storage/sst_object_table.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -36,7 +36,7 @@
 #else
     uint32_t version;               /*!< File version */
 #endif
-    psa_ps_uid_t uid;               /*!< Object UID */
+    psa_storage_uid_t uid;          /*!< Object UID */
     int32_t client_id;              /*!< Client ID */
 };
 
@@ -215,7 +215,7 @@
 __STATIC_INLINE void sst_object_table_fs_read_table(
                                       struct sst_obj_table_init_ctx_t *init_ctx)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     /* FIXME: Read table from a persistent memory (flash location or FS) */
 
     /* Read file with the table 0 data */
@@ -223,7 +223,7 @@
                              SST_OBJ_TABLE_SIZE,
                              SST_OBJECT_TABLE_OBJECT_OFFSET,
                              (uint8_t *)init_ctx->p_table[SST_OBJ_TABLE_IDX_0]);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         init_ctx->table_state[SST_OBJ_TABLE_IDX_0] = SST_OBJ_TABLE_INVALID;
     }
 
@@ -232,7 +232,7 @@
                              SST_OBJ_TABLE_SIZE,
                              SST_OBJECT_TABLE_OBJECT_OFFSET,
                              (uint8_t *)init_ctx->p_table[SST_OBJ_TABLE_IDX_1]);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         init_ctx->table_state[SST_OBJ_TABLE_IDX_1] = SST_OBJ_TABLE_INVALID;
     }
 }
@@ -243,13 +243,13 @@
  * \param[in,out] obj_table  Pointer to the object table to generate
  *                           authentication
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
 __attribute__ ((always_inline))
-__STATIC_INLINE psa_ps_status_t sst_object_table_fs_write_table(
+__STATIC_INLINE psa_status_t sst_object_table_fs_write_table(
                                               struct sst_obj_table_t *obj_table)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t obj_table_id = SST_TABLE_FS_ID(sst_obj_table_ctx.scratch_table);
     uint8_t swap_table_idxs = sst_obj_table_ctx.scratch_table;
 
@@ -259,7 +259,7 @@
                                    SST_OBJ_TABLE_SIZE,
                                    SST_OBJ_TABLE_SIZE,
                                    (const uint8_t *)obj_table);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -267,7 +267,7 @@
     sst_obj_table_ctx.scratch_table = sst_obj_table_ctx.active_table;
     sst_obj_table_ctx.active_table = swap_table_idxs;
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
 #ifdef SST_ENCRYPTION
@@ -277,40 +277,40 @@
  *
  * \param[in] nvc_1  Value of SST non-volatile counter 1
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_object_table_align_nv_counters(uint32_t nvc_1)
+static psa_status_t sst_object_table_align_nv_counters(uint32_t nvc_1)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t nvc_x_val = 0;
 
     /* Align SST NVC 2 with NVC 1 */
     err = sst_read_nv_counter(TFM_SST_NV_COUNTER_2, &nvc_x_val);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     for (; nvc_x_val < nvc_1; nvc_x_val++) {
         err = sst_increment_nv_counter(TFM_SST_NV_COUNTER_2);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return err;
         }
     }
 
     /* Align SST NVC 3 with NVC 1 */
     err = sst_read_nv_counter(TFM_SST_NV_COUNTER_3, &nvc_x_val);
-    if (err != PSA_PS_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err != PSA_SUCCESS) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     for (; nvc_x_val < nvc_1; nvc_x_val++) {
         err = sst_increment_nv_counter(TFM_SST_NV_COUNTER_3);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return err;
         }
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
 /**
@@ -320,10 +320,10 @@
  * \param[in,out] obj_table  Pointer to the object table to generate
  *                           authentication
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
 __attribute__ ((always_inline))
-__STATIC_INLINE psa_ps_status_t sst_object_table_nvc_generate_auth_tag(
+__STATIC_INLINE psa_status_t sst_object_table_nvc_generate_auth_tag(
                                               uint32_t nvc_1,
                                               struct sst_obj_table_t *obj_table)
 {
@@ -354,7 +354,7 @@
 {
     struct sst_crypto_assoc_data_t assoc_data;
     union sst_crypto_t *crypto = &init_ctx->p_table[table_idx]->crypto;
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Init associated data with NVC 1 */
     assoc_data.nv_counter = init_ctx->nvc_1;
@@ -364,7 +364,7 @@
 
     err = sst_crypto_authenticate(crypto, (const uint8_t *)&assoc_data,
                                   SST_CRYPTO_ASSOCIATED_DATA_LEN);
-    if (err == PSA_PS_SUCCESS) {
+    if (err == PSA_SUCCESS) {
         init_ctx->table_state[table_idx] = SST_OBJ_TABLE_NVC_1_VALID;
         return;
     }
@@ -379,7 +379,7 @@
 
     err = sst_crypto_authenticate(crypto, (const uint8_t *)&assoc_data,
                                   SST_CRYPTO_ASSOCIATED_DATA_LEN);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         init_ctx->table_state[table_idx] = SST_OBJ_TABLE_INVALID;
     } else {
         init_ctx->table_state[table_idx] = SST_OBJ_TABLE_NVC_3_VALID;
@@ -391,27 +391,27 @@
  *
  * \param[in,out] init_ctx  Pointer to the object table to authenticate
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
 __attribute__ ((always_inline))
-__STATIC_INLINE psa_ps_status_t sst_object_table_nvc_authenticate(
+__STATIC_INLINE psa_status_t sst_object_table_nvc_authenticate(
                                       struct sst_obj_table_init_ctx_t *init_ctx)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t nvc_2;
 
     err = sst_read_nv_counter(TFM_SST_NV_COUNTER_1, &init_ctx->nvc_1);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     err = sst_read_nv_counter(TFM_SST_NV_COUNTER_2, &nvc_2);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     err = sst_read_nv_counter(TFM_SST_NV_COUNTER_3, &init_ctx->nvc_3);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -436,7 +436,7 @@
         sst_object_table_authenticate(SST_OBJ_TABLE_IDX_1, init_ctx);
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 #else /* SST_ROLLBACK_PROTECTION */
 
@@ -446,10 +446,10 @@
  * \param[in,out] obj_table  Pointer to the object table to generate
  *                           authentication
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
 __attribute__ ((always_inline))
-__STATIC_INLINE psa_ps_status_t sst_object_table_generate_auth_tag(
+__STATIC_INLINE psa_status_t sst_object_table_generate_auth_tag(
                                               struct sst_obj_table_t *obj_table)
 {
     union sst_crypto_t *crypto = &obj_table->crypto;
@@ -472,7 +472,7 @@
 __STATIC_INLINE void sst_object_table_authenticate_ctx_tables(
                                       struct sst_obj_table_init_ctx_t *init_ctx)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     union sst_crypto_t *crypto =
                                 &init_ctx->p_table[SST_OBJ_TABLE_IDX_0]->crypto;
 
@@ -481,7 +481,7 @@
         err = sst_crypto_authenticate(crypto,
                                       SST_CRYPTO_ASSOCIATED_DATA(crypto),
                                       SST_CRYPTO_ASSOCIATED_DATA_LEN);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             init_ctx->table_state[SST_OBJ_TABLE_IDX_0] = SST_OBJ_TABLE_INVALID;
         }
     }
@@ -493,7 +493,7 @@
         err = sst_crypto_authenticate(crypto,
                                       SST_CRYPTO_ASSOCIATED_DATA(crypto),
                                       SST_CRYPTO_ASSOCIATED_DATA_LEN);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             init_ctx->table_state[SST_OBJ_TABLE_IDX_1] = SST_OBJ_TABLE_INVALID;
         }
     }
@@ -506,23 +506,23 @@
  *
  * \param[in,out] obj_table  Pointer to the object table to save
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_object_table_save_table(
+static psa_status_t sst_object_table_save_table(
                                               struct sst_obj_table_t *obj_table)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
 #ifdef SST_ROLLBACK_PROTECTION
     uint32_t nvc_1 = 0;
 
     err = sst_increment_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     err = sst_read_nv_counter(TFM_SST_NV_COUNTER_1, &nvc_1);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 #else
@@ -542,7 +542,7 @@
 #ifdef SST_ENCRYPTION
     /* Set object table key */
     err = sst_crypto_setkey();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -556,13 +556,13 @@
     err = sst_object_table_generate_auth_tag(obj_table);
 #endif /* SST_ROLLBACK_PROTECTION */
 
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         (void)sst_crypto_destroykey();
         return err;
     }
 
     err = sst_crypto_destroykey();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 #endif /* SST_ENCRYPTION */
@@ -570,7 +570,7 @@
     err = sst_object_table_fs_write_table(obj_table);
 
 #ifdef SST_ROLLBACK_PROTECTION
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -611,9 +611,9 @@
  *
  * \param[in] init_ctx  Pointer to the init object table context
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-static psa_ps_status_t sst_set_active_object_table(
+static psa_status_t sst_set_active_object_table(
                                 const struct sst_obj_table_init_ctx_t *init_ctx)
 {
 #ifndef SST_ROLLBACK_PROTECTION
@@ -628,7 +628,7 @@
          && (init_ctx->table_state[SST_OBJ_TABLE_IDX_1] ==
                                                        SST_OBJ_TABLE_INVALID)) {
         /* Both tables are invalid */
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     } else if (init_ctx->table_state[SST_OBJ_TABLE_IDX_0] ==
                                                         SST_OBJ_TABLE_INVALID) {
           /* Table 0 is invalid, the active one is table 1 */
@@ -642,7 +642,7 @@
                            init_ctx->p_table[SST_OBJ_TABLE_IDX_1],
                            SST_OBJ_TABLE_SIZE);
 
-          return PSA_PS_SUCCESS;
+          return PSA_SUCCESS;
     } else if (init_ctx->table_state[SST_OBJ_TABLE_IDX_1] ==
                                                         SST_OBJ_TABLE_INVALID) {
         /* Table 1 is invalid, the active one is table 0 */
@@ -653,7 +653,7 @@
          * needed to copy the table in the context.
          */
 
-        return PSA_PS_SUCCESS;
+        return PSA_SUCCESS;
     }
 
 #ifdef SST_ROLLBACK_PROTECTION
@@ -715,7 +715,7 @@
                          SST_OBJ_TABLE_SIZE);
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
 /**
@@ -725,12 +725,12 @@
  * \param[in]  client_id  Client UID
  * \param[out] idx        Pointer to store the entry's index
  *
- * \return Returns PSA_PS_SUCCESS and index of the table, if object exists
- *         in the table. Otherwise, it returns PSA_PS_ERROR_UID_NOT_FOUND.
+ * \return Returns PSA_SUCCESS and index of the table, if object exists
+ *         in the table. Otherwise, it returns PSA_ERROR_DOES_NOT_EXIST.
  */
-static psa_ps_status_t sst_get_object_entry_idx(psa_ps_uid_t uid,
-                                                int32_t client_id,
-                                                uint32_t *idx)
+static psa_status_t sst_get_object_entry_idx(psa_storage_uid_t uid,
+                                             int32_t client_id,
+                                             uint32_t *idx)
 {
     uint32_t i;
     struct sst_obj_table_t *p_table = &sst_obj_table_ctx.obj_table;
@@ -739,11 +739,11 @@
         if (p_table->obj_db[i].uid == uid
             && p_table->obj_db[i].client_id == client_id) {
             *idx = i;
-            return PSA_PS_SUCCESS;
+            return PSA_SUCCESS;
         }
     }
 
-    return PSA_PS_ERROR_UID_NOT_FOUND;
+    return PSA_ERROR_DOES_NOT_EXIST;
 }
 
 /**
@@ -757,19 +757,19 @@
  *
  * \note The table is dimensioned to fit SST_NUM_ASSETS + 1
  *
- * \return Returns PSA_PS_SUCCESS and a table index if idx_num free indices are
- *         available. Otherwise, it returns PSA_PS_ERROR_INSUFFICIENT_SPACE.
+ * \return Returns PSA_SUCCESS and a table index if idx_num free indices are
+ *         available. Otherwise, it returns PSA_ERROR_INSUFFICIENT_STORAGE.
  */
 __attribute__ ((always_inline))
-__STATIC_INLINE psa_ps_status_t sst_table_free_idx(uint32_t idx_num,
-                                                   uint32_t *idx)
+__STATIC_INLINE psa_status_t sst_table_free_idx(uint32_t idx_num,
+                                                uint32_t *idx)
 {
     uint32_t i;
     uint32_t last_free = 0;
     struct sst_obj_table_t *p_table = &sst_obj_table_ctx.obj_table;
 
     if (idx_num == 0) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     for (i = 0; i < SST_OBJ_TABLE_ENTRIES && idx_num > 0; i++) {
@@ -780,10 +780,10 @@
     }
 
     if (idx_num != 0) {
-        return PSA_PS_ERROR_INSUFFICIENT_SPACE;
+        return PSA_ERROR_INSUFFICIENT_STORAGE;
     } else {
         *idx = last_free;
-        return PSA_PS_SUCCESS;
+        return PSA_SUCCESS;
     }
 }
 
@@ -808,16 +808,16 @@
 #endif
 }
 
-psa_ps_status_t sst_object_table_create(void)
+psa_status_t sst_object_table_create(void)
 {
     struct sst_obj_table_t *p_table = &sst_obj_table_ctx.obj_table;
 
 #ifdef SST_ROLLBACK_PROTECTION
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Initialize SST NV counters */
     err = sst_init_nv_counter();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 #endif
@@ -838,9 +838,9 @@
     return sst_object_table_save_table(p_table);
 }
 
-psa_ps_status_t sst_object_table_init(uint8_t *obj_data)
+psa_status_t sst_object_table_init(uint8_t *obj_data)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     struct sst_obj_table_init_ctx_t init_ctx = {
         .p_table = {&sst_obj_table_ctx.obj_table, NULL},
         .table_state = {SST_OBJ_TABLE_VALID, SST_OBJ_TABLE_VALID},
@@ -858,21 +858,21 @@
 #ifdef SST_ENCRYPTION
     /* Set object table key */
     err = sst_crypto_setkey();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
 #ifdef SST_ROLLBACK_PROTECTION
     /* Initialize SST NV counters */
     err = sst_init_nv_counter();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         (void)sst_crypto_destroykey();
         return err;
     }
 
     /* Authenticate table */
     err = sst_object_table_nvc_authenticate(&init_ctx);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         (void)sst_crypto_destroykey();
         return err;
     }
@@ -881,7 +881,7 @@
 #endif /* SST_ROLLBACK_PROTECTION */
 
     err = sst_crypto_destroykey();
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 #endif /* SST_ENCRYPTION */
@@ -891,21 +891,21 @@
 
     /* Set active tables */
     err = sst_set_active_object_table(&init_ctx);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
     /* Remove the old object table file */
     err = sst_flash_fs_file_delete(SST_TABLE_FS_ID(
                                               sst_obj_table_ctx.scratch_table));
-    if (err != PSA_PS_SUCCESS && err != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (err != PSA_SUCCESS && err != PSA_ERROR_DOES_NOT_EXIST) {
         return err;
     }
 
 #ifdef SST_ROLLBACK_PROTECTION
     /* Align SST NV counters */
     err = sst_object_table_align_nv_counters(init_ctx.nvc_1);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 #endif /* SST_ROLLBACK_PROTECTION */
@@ -914,25 +914,26 @@
     sst_crypto_set_iv(&sst_obj_table_ctx.obj_table.crypto);
 #endif
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_object_table_obj_exist(psa_ps_uid_t uid, int32_t client_id)
+psa_status_t sst_object_table_obj_exist(psa_storage_uid_t uid,
+                                        int32_t client_id)
 {
     uint32_t idx = 0;
 
     return sst_get_object_entry_idx(uid, client_id, &idx);
 }
 
-psa_ps_status_t sst_object_table_get_free_fid(uint32_t fid_num,
-                                              uint32_t *p_fid)
+psa_status_t sst_object_table_get_free_fid(uint32_t fid_num,
+                                           uint32_t *p_fid)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t fid;
     uint32_t idx;
 
     err = sst_table_free_idx(fid_num, &idx);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -945,26 +946,26 @@
      * can happened when the system is rebooted (e.g. power cut, ...) in the
      * middle of a create, write or delete operation.
      */
-    if (sst_flash_fs_file_exist(fid) == PSA_PS_SUCCESS) {
+    if (sst_flash_fs_file_exist(fid) == PSA_SUCCESS) {
         /* Remove old file from the persistent area, to keep it consistent
          * with the table content.
          */
         err = sst_flash_fs_file_delete(fid);
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return err;
         }
     }
 
     *p_fid = fid;
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_object_table_set_obj_tbl_info(psa_ps_uid_t uid,
-                                                  int32_t client_id,
+psa_status_t sst_object_table_set_obj_tbl_info(psa_storage_uid_t uid,
+                                               int32_t client_id,
                                 const struct sst_obj_table_info_t *obj_tbl_info)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t idx = 0;
     uint32_t backup_idx = 0;
     struct sst_obj_table_entry_t backup_entry = {
@@ -979,7 +980,7 @@
     struct sst_obj_table_t *p_table = &sst_obj_table_ctx.obj_table;
 
     err = sst_get_object_entry_idx(uid, client_id, &backup_idx);
-    if (err == PSA_PS_SUCCESS) {
+    if (err == PSA_SUCCESS) {
         /* If an entry exists for this UID, it creates a backup copy in case
          * an error happens while updating the new table in the filesystem.
          */
@@ -1003,7 +1004,7 @@
 #endif
 
     err = sst_object_table_save_table(p_table);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         if (backup_entry.uid != TFM_SST_INVALID_UID) {
             /* Rollback the change in the table */
             (void)tfm_memcpy(&p_table->obj_db[backup_idx], &backup_entry,
@@ -1016,16 +1017,16 @@
     return err;
 }
 
-psa_ps_status_t sst_object_table_get_obj_tbl_info(psa_ps_uid_t uid,
-                                                  int32_t client_id,
+psa_status_t sst_object_table_get_obj_tbl_info(psa_storage_uid_t uid,
+                                               int32_t client_id,
                                       struct sst_obj_table_info_t *obj_tbl_info)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
     uint32_t idx;
     struct sst_obj_table_t *p_table = &sst_obj_table_ctx.obj_table;
 
     err = sst_get_object_entry_idx(uid, client_id, &idx);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         return err;
     }
 
@@ -1038,22 +1039,22 @@
     obj_tbl_info->version = p_table->obj_db[idx].version;
 #endif
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_object_table_delete_object(psa_ps_uid_t uid,
-                                               int32_t client_id)
+psa_status_t sst_object_table_delete_object(psa_storage_uid_t uid,
+                                            int32_t client_id)
 {
     uint32_t backup_idx = 0;
     struct sst_obj_table_entry_t backup_entry;
-    psa_ps_status_t err;
+    psa_status_t err;
     struct sst_obj_table_t *p_table = &sst_obj_table_ctx.obj_table;
 
     /* Create a backup copy in case an error happens while updating the new
      * table in the filesystem.
      */
     err = sst_get_object_entry_idx(uid, client_id, &backup_idx);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         /* If the object is not present in the table, it returns an error
          * to not generate a new file where the table content is the same.
          * Otherwise, that could be used by an attacker to get the encryption
@@ -1068,7 +1069,7 @@
     sst_table_delete_entry(backup_idx);
 
     err = sst_object_table_save_table(p_table);
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
        /* Rollback the change in the table */
        (void)tfm_memcpy(&p_table->obj_db[backup_idx], &backup_entry,
                         SST_OBJECTS_TABLE_ENTRY_SIZE);
@@ -1077,7 +1078,7 @@
     return err;
 }
 
-psa_ps_status_t sst_object_table_delete_old_table(void)
+psa_status_t sst_object_table_delete_old_table(void)
 {
     uint32_t table_id = SST_TABLE_FS_ID(sst_obj_table_ctx.scratch_table);
 
diff --git a/secure_fw/services/secure_storage/sst_object_table.h b/secure_fw/services/secure_storage/sst_object_table.h
index 5167c42..7d5a8cf 100644
--- a/secure_fw/services/secure_storage/sst_object_table.h
+++ b/secure_fw/services/secure_storage/sst_object_table.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -33,9 +33,9 @@
 /**
  * \brief Creates object table.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_table_create(void);
+psa_status_t sst_object_table_create(void);
 
 /**
  * \brief Initializes object table.
@@ -44,9 +44,9 @@
  *                          in other to reuse that memory to allocated a
  *                          temporary object table.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_table_init(uint8_t *obj_data);
+psa_status_t sst_object_table_init(uint8_t *obj_data);
 
 /**
  * \brief Checks if there is an entry in the table for the provided UID and
@@ -55,13 +55,13 @@
  * \param[in] uid        Identifier for the data
  * \param[in] client_id  Identifier of the asset’s owner (client)
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  *
- * \retval PSA_PS_SUCCESS              If there is a table entry for the object
- * \retval PSA_PS_ERROR_UID_NOT_FOUND  If no table entry exists for the object
+ * \retval PSA_SUCCESS                 If there is a table entry for the object
+ * \retval PSA_ERROR_DOES_NOT_EXIST    If no table entry exists for the object
  */
-psa_ps_status_t sst_object_table_obj_exist(psa_ps_uid_t uid,
-                                           int32_t client_id);
+psa_status_t sst_object_table_obj_exist(psa_storage_uid_t uid,
+                                        int32_t client_id);
 
 /**
  * \brief Gets a not in use file ID.
@@ -72,12 +72,12 @@
  *                    return 1 file ID.
  * \param[out] p_fid  Pointer to the location to store the file ID
  *
- * \return Returns PSA_PS_SUCCESS if the fid is valid and fid_num - 1 entries
+ * \return Returns PSA_SUCCESS if the fid is valid and fid_num - 1 entries
  *         are still free in the table. Otherwise, it returns an error code as
- *         specified in \ref psa_ps_status_t
+ *         specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_table_get_free_fid(uint32_t fid_num,
-                                              uint32_t *p_fid);
+psa_status_t sst_object_table_get_free_fid(uint32_t fid_num,
+                                           uint32_t *p_fid);
 
 /**
  * \brief Sets object table information in the object table and stores it
@@ -91,10 +91,10 @@
  * \note  A call to this function results in writing the table to the
  *        file system.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_table_set_obj_tbl_info(psa_ps_uid_t uid,
-                                                  int32_t client_id,
+psa_status_t sst_object_table_set_obj_tbl_info(psa_storage_uid_t uid,
+                                               int32_t client_id,
                                const struct sst_obj_table_info_t *obj_tbl_info);
 
 /**
@@ -106,11 +106,11 @@
  * \param[out] obj_tbl_info  Pointer to the location to store object table
  *                           information
  *
- * \return Returns PSA_PS_SUCCESS if the object exists. Otherwise, it
- *         returns PSA_PS_ERROR_UID_NOT_FOUND.
+ * \return Returns PSA_SUCCESS if the object exists. Otherwise, it
+ *         returns PSA_ERROR_DOES_NOT_EXIST.
  */
-psa_ps_status_t sst_object_table_get_obj_tbl_info(psa_ps_uid_t uid,
-                                                  int32_t client_id,
+psa_status_t sst_object_table_get_obj_tbl_info(psa_storage_uid_t uid,
+                                               int32_t client_id,
                                      struct sst_obj_table_info_t *obj_tbl_info);
 
 /**
@@ -119,17 +119,17 @@
  * \param[in]  uid        Identifier for the data.
  * \param[in]  client_id  Identifier of the asset’s owner (client)
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_table_delete_object(psa_ps_uid_t uid,
-                                               int32_t client_id);
+psa_status_t sst_object_table_delete_object(psa_storage_uid_t uid,
+                                            int32_t client_id);
 
 /**
  * \brief Deletes old object table from the persistent area.
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_object_table_delete_old_table(void);
+psa_status_t sst_object_table_delete_old_table(void);
 
 #ifdef __cplusplus
 }
diff --git a/secure_fw/services/secure_storage/sst_utils.c b/secure_fw/services/secure_storage/sst_utils.c
index a16ce47..dd8f7a4 100644
--- a/secure_fw/services/secure_storage/sst_utils.c
+++ b/secure_fw/services/secure_storage/sst_utils.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -7,13 +7,13 @@
 
 #include "sst_utils.h"
 
-psa_ps_status_t sst_utils_check_contained_in(uint32_t superset_size,
-                                             uint32_t subset_offset,
-                                             uint32_t subset_size)
+psa_status_t sst_utils_check_contained_in(uint32_t superset_size,
+                                          uint32_t subset_offset,
+                                          uint32_t subset_size)
 {
     /* Check that subset_offset is valid */
     if (subset_offset > superset_size) {
-        return PSA_PS_ERROR_OFFSET_INVALID;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     /* Check that subset_offset + subset_size fits in superset_size.
@@ -21,17 +21,17 @@
      * and so the right hand side of the inequality cannot underflow.
      */
     if (subset_size > (superset_size - subset_offset)) {
-        return PSA_PS_ERROR_INCORRECT_SIZE;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_utils_validate_fid(uint32_t fid)
+psa_status_t sst_utils_validate_fid(uint32_t fid)
 {
     if (fid == SST_INVALID_FID) {
-        return PSA_PS_ERROR_UID_NOT_FOUND;
+        return PSA_ERROR_DOES_NOT_EXIST;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
diff --git a/secure_fw/services/secure_storage/sst_utils.h b/secure_fw/services/secure_storage/sst_utils.h
index 3133c19..f05f356 100644
--- a/secure_fw/services/secure_storage/sst_utils.h
+++ b/secure_fw/services/secure_storage/sst_utils.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -42,6 +42,11 @@
 typedef char err_msg[(data_size <= data_buf_size)*2 - 1]
 
 /**
+ * \brief Evaluates to the minimum of the two parameters.
+ */
+#define SST_UTILS_MIN(x, y) (((x) < (y)) ? (x) : (y))
+
+/**
  * \brief Macro to get the number of bytes aligned with the
  *        SST_FLASH_PROGRAM_UNIT.
  *
@@ -60,28 +65,28 @@
  *                           superset region
  * \param[in] subset_size    Size of subset region
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  *
- * \retval PSA_PS_SUCCESS               The subset is contained within the
+ * \retval PSA_SUCCESS                  The subset is contained within the
  *                                      superset
- * \retval PSA_PS_ERROR_OFFSET_INVALID  The subset offset is greater than the
- *                                      size of the superset
- * \retval PSA_PS_ERROR_INCORRECT_SIZE  The subset offset is valid, but the
+ * \retval PSA_ERROR_INVALID_ARGUMENT   The subset offset is greater than the
+ *                                      size of the superset or when
+ *                                      the subset offset is valid, but the
  *                                      subset offset + size is greater than the
  *                                      size of the superset
  */
-psa_ps_status_t sst_utils_check_contained_in(uint32_t superset_size,
-                                             uint32_t subset_offset,
-                                             uint32_t subset_size);
+psa_status_t sst_utils_check_contained_in(uint32_t superset_size,
+                                          uint32_t subset_offset,
+                                          uint32_t subset_size);
 
 /**
  * \brief Validates file ID
  *
  * \param[in] fid  File ID
  *
- * \return Returns error code as specified in \ref psa_ps_status_t
+ * \return Returns error code as specified in \ref psa_status_t
  */
-psa_ps_status_t sst_utils_validate_fid(uint32_t fid);
+psa_status_t sst_utils_validate_fid(uint32_t fid);
 
 #ifdef __cplusplus
 }
diff --git a/secure_fw/services/secure_storage/tfm_protected_storage.c b/secure_fw/services/secure_storage/tfm_protected_storage.c
index 0655505..674d81a 100644
--- a/secure_fw/services/secure_storage/tfm_protected_storage.c
+++ b/secure_fw/services/secure_storage/tfm_protected_storage.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -9,9 +9,9 @@
 #include "sst_object_system.h"
 #include "tfm_sst_defs.h"
 
-psa_ps_status_t tfm_sst_init(void)
+psa_status_t tfm_sst_init(void)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     err = sst_system_prepare();
 #ifdef SST_CREATE_FLASH_LAYOUT
@@ -26,12 +26,12 @@
      * when it is the first time in the device life that the SST service is
      * executed.
      */
-    if (err != PSA_PS_SUCCESS) {
+    if (err != PSA_SUCCESS) {
         /* Remove all data in the SST memory area and create a valid SST flash
          * layout in that area.
          */
         err = sst_system_wipe_all();
-        if (err != PSA_PS_SUCCESS) {
+        if (err != PSA_SUCCESS) {
             return err;
         }
 
@@ -43,69 +43,73 @@
     return err;
 }
 
-psa_ps_status_t tfm_sst_set(int32_t client_id,
-                            psa_ps_uid_t uid,
-                            uint32_t data_length,
-                            psa_ps_create_flags_t create_flags)
+psa_status_t tfm_sst_set(int32_t client_id,
+                         psa_storage_uid_t uid,
+                         uint32_t data_length,
+                         psa_storage_create_flags_t create_flags)
 {
     /* Check that the UID is valid */
     if (uid == TFM_SST_INVALID_UID) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     /* Check that the create_flags does not contain any unsupported flags */
-    if (create_flags & ~PSA_PS_FLAG_WRITE_ONCE) {
-        return PSA_PS_ERROR_FLAGS_NOT_SUPPORTED;
+    if (create_flags & ~(PSA_STORAGE_FLAG_WRITE_ONCE |
+                         PSA_STORAGE_FLAG_NO_CONFIDENTIALITY |
+                         PSA_STORAGE_FLAG_NO_REPLAY_PROTECTION)) {
+        return PSA_ERROR_NOT_SUPPORTED;
     }
 
     /* Create the object in the object system */
     return sst_object_create(uid, client_id, create_flags, data_length);
 }
 
-psa_ps_status_t tfm_sst_get(int32_t client_id,
-                            psa_ps_uid_t uid,
-                            uint32_t data_offset,
-                            uint32_t data_length)
+psa_status_t tfm_sst_get(int32_t client_id,
+                         psa_storage_uid_t uid,
+                         uint32_t data_offset,
+                         uint32_t data_size,
+                         size_t *p_data_length)
 {
     /* Check that the UID is valid */
     if (uid == TFM_SST_INVALID_UID) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     /* Read the object data from the object system */
-    return sst_object_read(uid, client_id, data_offset, data_length);
+    return sst_object_read(uid, client_id, data_offset, data_size,
+                           p_data_length);
 }
 
-psa_ps_status_t tfm_sst_get_info(int32_t client_id, psa_ps_uid_t uid,
-                                 struct psa_ps_info_t *p_info)
+psa_status_t tfm_sst_get_info(int32_t client_id, psa_storage_uid_t uid,
+                              struct psa_storage_info_t *p_info)
 {
     /* Check that the UID is valid */
     if (uid == TFM_SST_INVALID_UID) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     /* Get the info struct data from the object system */
     return sst_object_get_info(uid, client_id, p_info);
 }
 
-psa_ps_status_t tfm_sst_remove(int32_t client_id, psa_ps_uid_t uid)
+psa_status_t tfm_sst_remove(int32_t client_id, psa_storage_uid_t uid)
 {
-    psa_ps_status_t err;
+    psa_status_t err;
 
     /* Check that the UID is valid */
     if (uid == TFM_SST_INVALID_UID) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_INVALID_ARGUMENT;
     }
 
     /* Delete the object from the object system */
     err = sst_object_delete(uid, client_id);
 
-    /* PSA_PS_ERROR_AUTH_FAILED is not supported by psa_ps_remove
+    /* PSA_ERROR_INVALID_SIGNATURE is not supported by psa_ps_remove
      * specification. So, this function returns TFM_SST_ERR_OPERATION_FAILED
      * instead.
      */
-    if (err == PSA_PS_ERROR_AUTH_FAILED) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+    if (err == PSA_ERROR_INVALID_SIGNATURE) {
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     return err;
diff --git a/secure_fw/services/secure_storage/tfm_protected_storage.h b/secure_fw/services/secure_storage/tfm_protected_storage.h
index 93f08d3..4cd44a5 100644
--- a/secure_fw/services/secure_storage/tfm_protected_storage.h
+++ b/secure_fw/services/secure_storage/tfm_protected_storage.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -20,16 +20,16 @@
  * \brief Initializes the secure storage system.
  *
  * \return A status indicating the success/failure of the operation as specified
- *         in \ref psa_ps_status_t
+ *         in \ref psa_status_t
  *
- * \retval PSA_PS_SUCCESS                  The operation completed successfully
- * \retval PSA_PS_ERROR_STORAGE_FAILURE    The operation failed because the
+ * \retval PSA_SUCCESS                     The operation completed successfully
+ * \retval PSA_ERROR_STORAGE_FAILURE       The operation failed because the
  *                                         storage system initialization has
  *                                         failed (fatal error)
- * \retval PSA_PS_ERROR_OPERATION_FAILED   The operation failed because of an
+ * \retval PSA_ERROR_GENERIC_ERROR         The operation failed because of an
  *                                         unspecified internal failure
  */
-psa_ps_status_t tfm_sst_init(void);
+psa_status_t tfm_sst_init(void);
 
 /**
  * \brief Creates a new or modifies an existing asset.
@@ -40,32 +40,33 @@
  * \param[in] create_flags  The flags indicating the properties of the data
  *
  * \return A status indicating the success/failure of the operation as specified
- *         in \ref psa_ps_status_t
+ *         in \ref psa_status_t
  *
- * \retval PSA_PS_SUCCESS                   The operation completed successfully
- * \retval PSA_PS_ERROR_WRITE_ONCE          The operation failed because the
+ * \retval PSA_SUCCESS                      The operation completed successfully
+ * \retval PSA_ERROR_NOT_PERMITTED          The operation failed because the
  *                                          provided uid value was already
- *                                          created with PSA_PS_FLAG_WRITE_ONCE
- * \retval PSA_PS_ERROR_INVALID_ARGUMENT    The operation failed because one or
+ *                                          created with
+ *                                          PSA_STORAGE_FLAG_WRITE_ONCE
+ * \retval PSA_ERROR_INVALID_ARGUMENT       The operation failed because one or
  *                                          more of the given arguments were
  *                                          invalid (null pointer, etc.)
- * \retval PSA_PS_ERROR_FLAGS_NOT_SUPPORTED The operation failed because one or
+ * \retval PSA_ERROR_NOT_SUPPORTED          The operation failed because one or
  *                                          more of the flags provided in
  *                                          `create_flags` is not supported or
  *                                          is not valid
- * \retval PSA_PS_ERROR_INSUFFICIENT_SPACE  The operation failed because there
+ * \retval PSA_ERROR_INSUFFICIENT_STORAGE   The operation failed because there
  *                                          was insufficient space on the
  *                                          storage medium
- * \retval PSA_PS_ERROR_STORAGE_FAILURE     The operation failed because the
+ * \retval PSA_ERROR_STORAGE_FAILURE        The operation failed because the
  *                                          physical storage has failed (fatal
  *                                          error)
- * \retval PSA_PS_ERROR_OPERATION_FAILED    The operation failed because of an
+ * \retval PSA_ERROR_GENERIC_ERROR          The operation failed because of an
  *                                          unspecified internal failure.
  */
-psa_ps_status_t tfm_sst_set(int32_t client_id,
-                            psa_ps_uid_t uid,
-                            uint32_t data_length,
-                            psa_ps_create_flags_t create_flags);
+psa_status_t tfm_sst_set(int32_t client_id,
+                         psa_storage_uid_t uid,
+                         uint32_t data_length,
+                         psa_storage_create_flags_t create_flags);
 /**
  * \brief Gets the asset data for the provided uid.
  *
@@ -77,65 +78,62 @@
  *                          allocated size of the `p_data` buffer)
  *
  * \return A status indicating the success/failure of the operation as specified
- *         in \ref psa_ps_status_t
+ *         in \ref psa_status_t
  *
- * \retval PSA_PS_SUCCESS                 The operation completed successfully
- * \retval PSA_PS_ERROR_INVALID_ARGUMENT  The operation failed because one or
+ * \retval PSA_SUCCESS                    The operation completed successfully
+ * \retval PSA_ERROR_INVALID_ARGUMENT     The operation failed because one or
  *                                        more of the given arguments were
  *                                        invalid (null pointer, etc.)
- * \retval PSA_PS_ERROR_UID_NOT_FOUND     The operation failed because the
+ * \retval PSA_ERROR_DOES_NOT_EXIST       The operation failed because the
  *                                        provided uid value was not found in
  *                                        the storage
- * \retval PSA_PS_ERROR_INCORRECT_SIZE    The operation failed because the data
- *                                        associated with provided uid is not
- *                                        the same size as `data_size`
- * \retval PSA_PS_ERROR_STORAGE_FAILURE   The operation failed because the
+ * \retval PSA_ERROR_STORAGE_FAILURE      The operation failed because the
  *                                        physical storage has failed (fatal
  *                                        error)
- * \retval PSA_PS_ERROR_OPERATION_FAILED  The operation failed because of an
+ * \retval PSA_ERROR_GENERIC_ERROR        The operation failed because of an
  *                                        unspecified internal failure
- * \retval PSA_PS_ERROR_DATA_CORRUPT      The operation failed because the data
+ * \retval PSA_ERROR_DATA_CORRUPT         The operation failed because the data
  *                                        associated with the UID was corrupt
- * \retval PSA_PS_ERROR_AUTH_FAILED       The operation failed because the data
+ * \retval PSA_ERROR_INVALID_SIGNATURE    The operation failed because the data
  *                                        associated with the UID failed
  *                                        authentication
  */
-psa_ps_status_t tfm_sst_get(int32_t client_id,
-                            psa_ps_uid_t uid,
-                            uint32_t data_offset,
-                            uint32_t data_length);
-
+psa_status_t tfm_sst_get(int32_t client_id,
+                         psa_storage_uid_t uid,
+                         uint32_t data_offset,
+                         uint32_t data_size,
+                         size_t *p_data_length);
 /**
  * \brief Gets the metadata for the provided uid.
  *
  * \param[in]  client_id  Identifier of the asset's owner (client)
  * \param[in]  uid        Unique identifier for the data
- * \param[out] p_info     A pointer to the `psa_ps_info_t` struct that will be
- *                        populated with the metadata
+ * \param[out] p_info     A pointer to the `psa_storage_info_t` struct that will
+ *                        be populated with the metadata
  *
  * \return A status indicating the success/failure of the operation as specified
- *         in \ref psa_ps_status_t
+ *         in \ref psa_status_t
  *
- * \retval PSA_PS_SUCCESS                 The operation completed successfully
- * \retval PSA_PS_ERROR_INVALID_ARGUMENT  The operation failed because one or
+ * \retval PSA_SUCCESS                    The operation completed successfully
+ * \retval PSA_ERROR_INVALID_ARGUMENT     The operation failed because one or
  *                                        more of the given arguments were
  *                                        invalid (null pointer, etc.)
- * \retval PSA_PS_ERROR_UID_NOT_FOUND     The operation failed because the
+ * \retval PSA_ERROR_DOES_NOT_EXIST       The operation failed because the
  *                                        provided uid value was not found in
  *                                        the storage
- * \retval PSA_PS_ERROR_STORAGE_FAILURE   The operation failed because the
+ * \retval PSA_ERROR_STORAGE_FAILURE      The operation failed because the
  *                                        physical storage has failed (fatal
  *                                        error)
- * \retval PSA_PS_ERROR_OPERATION_FAILED  The operation failed because of an
+ * \retval PSA_ERROR_GENERIC_ERROR        The operation failed because of an
  *                                        unspecified internal failure
- * \retval PSA_PS_ERROR_DATA_CORRUPT      The operation failed because the data
+ * \retval PSA_ERROR_DATA_CORRUPT         The operation failed because the data
  *                                        associated with the UID was corrupt
- * \retval PSA_PS_ERROR_AUTH_FAILED       The operation failed because the data
+ * \retval PSA_ERROR_INVALID_SIGNATURE    The operation failed because the data
  *                                        associated with the UID failed
  *                                        authentication
  */
-psa_ps_status_t tfm_sst_get_info(int32_t client_id, psa_ps_uid_t uid,
-                                 struct psa_ps_info_t *p_info);
+psa_status_t tfm_sst_get_info(int32_t client_id, psa_storage_uid_t uid,
+                              struct psa_storage_info_t *p_info);
 
 /**
  * \brief Removes the provided uid and its associated data from storage.
@@ -144,25 +142,25 @@
  * \param[in] uid        Unique identifier for the data to be removed
  *
  * \return A status indicating the success/failure of the operation as specified
- *         in \ref psa_ps_status_t
+ *         in \ref psa_status_t
  *
- * \retval PSA_PS_SUCCESS                 The operation completed successfully
- * \retval PSA_PS_ERROR_INVALID_ARGUMENT  The operation failed because one or
+ * \retval PSA_SUCCESS                    The operation completed successfully
+ * \retval PSA_ERROR_INVALID_ARGUMENT     The operation failed because one or
  *                                        more of the given arguments were
  *                                        invalid (null pointer, etc.)
- * \retval PSA_PS_ERROR_UID_NOT_FOUND     The operation failed because the
+ * \retval PSA_ERROR_DOES_NOT_EXIST       The operation failed because the
  *                                        provided uid value was not found in
  *                                        the storage
- * \retval PSA_PS_ERROR_WRITE_ONCE        The operation failed because the
+ * \retval PSA_ERROR_NOT_PERMITTED        The operation failed because the
  *                                        provided uid value was created with
- *                                        PSA_PS_WRITE_ONCE_FLAG
- * \retval PSA_PS_ERROR_STORAGE_FAILURE   The operation failed because the
+ *                                        PSA_STORAGE_FLAG_WRITE_ONCE
+ * \retval PSA_ERROR_STORAGE_FAILURE      The operation failed because the
  *                                        physical storage has failed (fatal
  *                                        error)
- * \retval PSA_PS_ERROR_OPERATION_FAILED  The operation failed because of an
+ * \retval PSA_ERROR_GENERIC_ERROR        The operation failed because of an
  *                                        unspecified internal failure
  */
-psa_ps_status_t tfm_sst_remove(int32_t client_id, psa_ps_uid_t uid);
+psa_status_t tfm_sst_remove(int32_t client_id, psa_storage_uid_t uid);
 
 /**
  * \brief Gets a bitmask with flags set for all of the optional features
diff --git a/secure_fw/services/secure_storage/tfm_sst_req_mngr.c b/secure_fw/services/secure_storage/tfm_sst_req_mngr.c
index 15141d8..a005bdb 100644
--- a/secure_fw/services/secure_storage/tfm_sst_req_mngr.c
+++ b/secure_fw/services/secure_storage/tfm_sst_req_mngr.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -37,14 +37,14 @@
  *       function call, as calls to the Crypto service are required for
  *       initialisation.
  *
- * \return PSA_SUCCESS if SST is initialised, PSA_ERROR_CONNECTION_REFUSED
+ * \return PSA_SUCCESS if SST is initialised, PSA_ERROR_GENERIC_ERROR
  *         otherwise.
  */
 static psa_status_t sst_check_init(void)
 {
     if (!sst_is_init) {
-        if (tfm_sst_init() != PSA_PS_SUCCESS) {
-            return PSA_ERROR_CONNECTION_REFUSED;
+        if (tfm_sst_init() != PSA_SUCCESS) {
+            return PSA_ERROR_GENERIC_ERROR;
         }
         sst_is_init = true;
     }
@@ -55,109 +55,91 @@
 psa_status_t tfm_sst_set_req(psa_invec *in_vec, size_t in_len,
                              psa_outvec *out_vec, size_t out_len)
 {
-    psa_ps_uid_t uid;
+    psa_storage_uid_t uid;
     uint32_t data_length;
     int32_t client_id;
     int32_t status;
-    psa_ps_create_flags_t create_flags;
-    psa_ps_status_t *err;
+    psa_storage_create_flags_t create_flags;
 
     if (sst_check_init() != PSA_SUCCESS) {
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    if ((in_len != 3) || (out_len != 1)) {
+    if ((in_len != 3) || (out_len != 0)) {
         /* The number of arguments are incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    if (in_vec[0].len != sizeof(psa_ps_uid_t)) {
+    if (in_vec[0].len != sizeof(psa_storage_uid_t)) {
         /* The input argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    uid = *((psa_ps_uid_t *)in_vec[0].base);
+    uid = *((psa_storage_uid_t *)in_vec[0].base);
 
     p_data = (void *)in_vec[1].base;
     data_length = in_vec[1].len;
 
-    if (in_vec[2].len != sizeof(psa_ps_create_flags_t)) {
+    if (in_vec[2].len != sizeof(psa_storage_create_flags_t)) {
         /* The input argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    create_flags = *(psa_ps_create_flags_t *)in_vec[2].base;
-
-    if (out_vec[0].len != sizeof(psa_ps_status_t)) {
-        /* The output argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
-    }
-
-    err = (psa_ps_status_t *)out_vec[0].base;
+    create_flags = *(psa_storage_create_flags_t *)in_vec[2].base;
 
     /* Get the caller's client ID */
     status = tfm_core_get_caller_client_id(&client_id);
     if (status != (int32_t)TFM_SUCCESS) {
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    *err = tfm_sst_set(client_id, uid, data_length, create_flags);
-
-    return PSA_SUCCESS;
+    return tfm_sst_set(client_id, uid, data_length, create_flags);
 }
 
 psa_status_t tfm_sst_get_req(psa_invec *in_vec, size_t in_len,
                              psa_outvec *out_vec, size_t out_len)
 {
     uint32_t data_offset;
-    uint32_t data_length;
+    uint32_t data_size;
     int32_t client_id;
-    psa_ps_uid_t uid;
+    psa_storage_uid_t uid;
     int32_t status;
-    psa_ps_status_t *err;
+    size_t *p_data_length;
 
     if (sst_check_init() != PSA_SUCCESS) {
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    if ((in_len != 2) || (out_len != 2)) {
+    if ((in_len != 2) || (out_len != 1)) {
         /* The number of arguments are incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    if (in_vec[0].len != sizeof(psa_ps_uid_t)) {
+    if (in_vec[0].len != sizeof(psa_storage_uid_t)) {
         /* The input argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    uid = *((psa_ps_uid_t *)in_vec[0].base);
+    uid = *((psa_storage_uid_t *)in_vec[0].base);
 
     if (in_vec[1].len != sizeof(data_offset)) {
         /* The input argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
     data_offset = *(uint32_t *)in_vec[1].base;
 
-    if (out_vec[0].len != sizeof(psa_ps_status_t)) {
-        /* The output argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
-    }
-
-    err = (psa_ps_status_t *)out_vec[0].base;
-
-    p_data = (void *)out_vec[1].base;
-    data_length = out_vec[1].len;
+    p_data = (void *)out_vec[0].base;
+    data_size = out_vec[0].len;
+    p_data_length = &out_vec[0].len;
 
     /* Get the caller's client ID */
     status = tfm_core_get_caller_client_id(&client_id);
     if (status != (int32_t)TFM_SUCCESS) {
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    *err = tfm_sst_get(client_id, uid, data_offset, data_length);
-
-    return PSA_SUCCESS;
+    return tfm_sst_get(client_id, uid, data_offset, data_size, p_data_length);
 
 }
 
@@ -165,92 +147,69 @@
                                   psa_outvec *out_vec, size_t out_len)
 {
     int32_t client_id;
-    psa_ps_uid_t uid;
-    struct psa_ps_info_t *p_info;
-    int32_t status;
-    psa_ps_status_t *err;
+    psa_storage_uid_t uid;
+    struct psa_storage_info_t *p_info;
+    int32_t tfm_status;
 
     if (sst_check_init() != PSA_SUCCESS) {
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    if ((in_len != 1) || (out_len != 2)) {
+    if ((in_len != 1) || (out_len != 1)) {
         /* The number of arguments are incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    if (in_vec[0].len != sizeof(psa_ps_uid_t)) {
+    if (in_vec[0].len != sizeof(psa_storage_uid_t)) {
         /* The input argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    uid = *((psa_ps_uid_t *)in_vec[0].base);
+    uid = *((psa_storage_uid_t *)in_vec[0].base);
 
-    if (out_vec[0].len != sizeof(psa_ps_status_t)) {
+    if (out_vec[0].len != sizeof(struct psa_storage_info_t)) {
         /* The output argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    err = (psa_ps_status_t *)out_vec[0].base;
-
-    if (out_vec[1].len != sizeof(struct psa_ps_info_t)) {
-        /* The output argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
-    }
-
-    p_info = (struct psa_ps_info_t *)out_vec[1].base;
+    p_info = (struct psa_storage_info_t *)out_vec[0].base;
 
     /* Get the caller's client ID */
-    status = tfm_core_get_caller_client_id(&client_id);
-    if (status != (int32_t)TFM_SUCCESS) {
-        return PSA_ERROR_CONNECTION_REFUSED;
+    tfm_status = tfm_core_get_caller_client_id(&client_id);
+    if (tfm_status != (int32_t)TFM_SUCCESS) {
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    *err = tfm_sst_get_info(client_id, uid, p_info);
-
-    return PSA_SUCCESS;
+    return tfm_sst_get_info(client_id, uid, p_info);
 }
 
 psa_status_t tfm_sst_remove_req(psa_invec *in_vec, size_t in_len,
                                 psa_outvec *out_vec, size_t out_len)
 {
     int32_t client_id;
-    psa_ps_uid_t uid;
-    int32_t status;
-    psa_ps_status_t *err;
+    psa_storage_uid_t uid;
+    int32_t tfm_status;
 
     if (sst_check_init() != PSA_SUCCESS) {
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    if ((in_len != 1) || (out_len != 1)) {
-        /* The number of arguments are incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+    if ((in_len != 1) ||
+        (in_vec[0].len != sizeof(psa_storage_uid_t)) ||
+        (out_len != 0)) {
+        /* The number of arguments/output argument size are incorrect */
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    if (in_vec[0].len != sizeof(psa_ps_uid_t)) {
-        /* The input argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
-    }
-
-    uid = *((psa_ps_uid_t *)in_vec[0].base);
-
-    if (out_vec[0].len != sizeof(psa_ps_status_t)) {
-        /* The output argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
-    }
-
-    err = (psa_ps_status_t *)out_vec[0].base;
+    uid = *((psa_storage_uid_t *)in_vec[0].base);
 
     /* Get the caller's client ID */
-    status = tfm_core_get_caller_client_id(&client_id);
-    if (status != (int32_t)TFM_SUCCESS) {
-        return PSA_ERROR_CONNECTION_REFUSED;
+    tfm_status = tfm_core_get_caller_client_id(&client_id);
+    if (tfm_status != (int32_t)TFM_SUCCESS) {
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    *err = tfm_sst_remove(client_id, uid);
-
-    return PSA_SUCCESS;
+    return tfm_sst_remove(client_id, uid);;
 }
 
 psa_status_t tfm_sst_get_support_req(psa_invec *in_vec, size_t in_len,
@@ -261,17 +220,17 @@
     (void)in_vec;
 
     if (sst_check_init() != PSA_SUCCESS) {
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     if ((in_len != 0) || (out_len != 1)) {
         /* The number of arguments are incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
     if (out_vec[0].len != sizeof(*support_flags)) {
         /* The output argument size is incorrect */
-        return PSA_ERROR_CONNECTION_REFUSED;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
     support_flags = (uint32_t *)out_vec[0].base;
@@ -287,130 +246,102 @@
 
 static psa_status_t tfm_sst_set_ipc(void)
 {
-    psa_ps_uid_t uid;
+    psa_storage_uid_t uid;
     int32_t client_id;
-    psa_ps_create_flags_t create_flags;
-    size_t in_size[3], out_size, num = 0;
-    psa_ps_status_t err;
+    psa_storage_create_flags_t create_flags;
+    size_t num = 0;
 
     client_id = msg.client_id;
-    in_size[0] = msg.in_size[0];
-    in_size[1] = msg.in_size[1];
-    in_size[2] = msg.in_size[2];
-    out_size = msg.out_size[0];
-    if (in_size[0] != sizeof(psa_ps_uid_t) ||
-        in_size[2] != sizeof(psa_ps_create_flags_t) ||
-        out_size != sizeof(psa_ps_status_t)) {
+
+    if (msg.in_size[0] != sizeof(psa_storage_uid_t) ||
+        msg.in_size[2] != sizeof(psa_storage_create_flags_t)) {
         /* The size of one of the arguments is incorrect */
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    num = psa_read(msg.handle, 0, &uid, in_size[0]);
-    if (num != in_size[0]) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+    num = psa_read(msg.handle, 0, &uid, msg.in_size[0]);
+    if (num != msg.in_size[0]) {
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    num = psa_read(msg.handle, 2, &create_flags, in_size[2]);
-    if (num != in_size[2]) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+    num = psa_read(msg.handle, 2, &create_flags, msg.in_size[2]);
+    if (num != msg.in_size[2]) {
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    err = tfm_sst_set(client_id, uid, in_size[1], create_flags);
-    psa_write(msg.handle, 0, &err, out_size);
-    return PSA_SUCCESS;
+    return tfm_sst_set(client_id, uid, msg.in_size[1], create_flags);
 }
 
 static psa_status_t tfm_sst_get_ipc(void)
 {
-    psa_ps_uid_t uid;
-    int32_t client_id;
+    psa_storage_uid_t uid;
     uint32_t data_offset;
-    size_t in_size[2], out_size[2], num = 0;
-    psa_ps_status_t err;
+    size_t num = 0;
+    size_t p_data_length;
 
-    client_id = msg.client_id;
-    in_size[0] = msg.in_size[0];
-    in_size[1] = msg.in_size[1];
-    out_size[0] = msg.out_size[0];
-    out_size[1] = msg.out_size[1];
-    if (in_size[0] != sizeof(psa_ps_uid_t) ||
-        in_size[1] != sizeof(uint32_t) ||
-        out_size[0] != sizeof(psa_ps_status_t)) {
+    if (msg.in_size[0] != sizeof(psa_storage_uid_t) ||
+        msg.in_size[1] != sizeof(uint32_t)) {
         /* The size of one of the arguments is incorrect */
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    num = psa_read(msg.handle, 0, &uid, in_size[0]);
-    if (num != in_size[0]) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+    num = psa_read(msg.handle, 0, &uid,  msg.in_size[0]);
+    if (num != msg.in_size[0]) {
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    num = psa_read(msg.handle, 1, &data_offset, in_size[1]);
-    if (num != in_size[1]) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+    num = psa_read(msg.handle, 1, &data_offset, msg.in_size[1]);
+    if (num !=  msg.in_size[1]) {
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    err = tfm_sst_get(client_id, uid, data_offset, out_size[1]);
-    psa_write(msg.handle, 0, &err, out_size[0]);
-    return PSA_SUCCESS;
+    return tfm_sst_get(msg.client_id, uid, data_offset,  msg.out_size[0],
+                       &p_data_length);
 }
 
 static psa_status_t tfm_sst_get_info_ipc(void)
 {
-    psa_ps_uid_t uid;
-    int32_t client_id;
-    struct psa_ps_info_t info;
-    size_t in_size, out_size[2], num = 0;
-    psa_ps_status_t err;
+    psa_storage_uid_t uid;
 
-    client_id = msg.client_id;
-    in_size = msg.in_size[0];
-    out_size[0] = msg.out_size[0];
-    out_size[1] = msg.out_size[1];
-    if (in_size != sizeof(psa_ps_uid_t) ||
-        out_size[0] != sizeof(psa_ps_status_t) ||
-        out_size[1] != sizeof(struct psa_ps_info_t)) {
+    struct psa_storage_info_t info;
+    size_t num = 0;
+    psa_status_t status;
+
+    if (msg.in_size[0] != sizeof(psa_storage_uid_t) ||
+        msg.out_size[0] != sizeof(struct psa_storage_info_t)) {
         /* The size of one of the arguments is incorrect */
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    num = psa_read(msg.handle, 0, &uid, in_size);
-    if (num != in_size) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+    num = psa_read(msg.handle, 0, &uid, msg.in_size[0]);
+    if (num != msg.in_size[0]) {
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    err = tfm_sst_get_info(client_id, uid, &info);
-    psa_write(msg.handle, 0, &err, out_size[0]);
-    if (err == PSA_PS_SUCCESS) {
-        psa_write(msg.handle, 1, &info, out_size[1]);
+    status = tfm_sst_get_info(msg.client_id, uid, &info);
+
+    if (status == PSA_SUCCESS) {
+        psa_write(msg.handle, 0, &info, msg.out_size[0]);
     }
-    return PSA_SUCCESS;
+    return status;
 }
 
 static psa_status_t tfm_sst_remove_ipc(void)
 {
-    psa_ps_uid_t uid;
-    int32_t client_id;
-    size_t in_size, out_size, num = 0;
-    psa_ps_status_t err;
+    psa_storage_uid_t uid;
+    size_t num = 0;
 
-    client_id = msg.client_id;
-    in_size = msg.in_size[0];
-    out_size = msg.out_size[0];
-    if (in_size != sizeof(psa_ps_uid_t) ||
-        out_size != sizeof(psa_ps_status_t)) {
+    if (msg.in_size[0] != sizeof(psa_storage_uid_t)) {
         /* The size of one of the arguments is incorrect */
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    num = psa_read(msg.handle, 0, &uid, in_size);
-    if (num != in_size) {
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+    num = psa_read(msg.handle, 0, &uid, msg.in_size[0]);
+    if (num != msg.in_size[0]) {
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
-    err = tfm_sst_remove(client_id, uid);
-    psa_write(msg.handle, 0, &err, out_size);
-    return PSA_SUCCESS;
+    return tfm_sst_remove(msg.client_id, uid);;
 }
 
 static psa_status_t tfm_sst_get_support_ipc(void)
@@ -421,7 +352,7 @@
     out_size = msg.out_size[0];
     if (out_size != sizeof(support_flags)) {
         /* The output argument size is incorrect */
-        return PSA_PS_ERROR_INVALID_ARGUMENT;
+        return PSA_ERROR_PROGRAMMER_ERROR;
     }
 
     support_flags = tfm_sst_get_support();
@@ -461,12 +392,12 @@
 }
 #endif /* !defined(TFM_PSA_API) */
 
-psa_ps_status_t tfm_sst_req_mngr_init(void)
+psa_status_t tfm_sst_req_mngr_init(void)
 {
 #ifdef TFM_PSA_API
     psa_signal_t signals = 0;
 
-    if (tfm_sst_init() != PSA_PS_SUCCESS) {
+    if (tfm_sst_init() != PSA_SUCCESS) {
         tfm_abort();
     }
 
@@ -492,28 +423,28 @@
      * function call, as calls to the Crypto service are required for
      * initialisation.
      */
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_req_mngr_read_asset_data(uint8_t *out_data, uint32_t size)
+psa_status_t sst_req_mngr_read_asset_data(uint8_t *out_data, uint32_t size)
 {
 #ifdef TFM_PSA_API
   size_t num = 0;
   num = psa_read(msg.handle, 1, out_data, size);
   if (num != size) {
-      return PSA_PS_ERROR_INVALID_ARGUMENT;
+      return PSA_ERROR_PROGRAMMER_ERROR;
   }
 #else /* TFM_PSA_API */
   (void)tfm_memcpy(out_data, p_data, size);
 #endif
-  return PSA_PS_SUCCESS;
+  return PSA_SUCCESS;
 }
 
 void sst_req_mngr_write_asset_data(const uint8_t *in_data,
                                    uint32_t size)
 {
 #ifdef TFM_PSA_API
-  psa_write(msg.handle, 1, in_data, size);
+  psa_write(msg.handle, 0, in_data, size);
 #else /* TFM_PSA_API */
   (void)tfm_memcpy(p_data, in_data, size);
 #endif
diff --git a/secure_fw/services/secure_storage/tfm_sst_req_mngr.h b/secure_fw/services/secure_storage/tfm_sst_req_mngr.h
index c3b76fa..e1ce2e0 100644
--- a/secure_fw/services/secure_storage/tfm_sst_req_mngr.h
+++ b/secure_fw/services/secure_storage/tfm_sst_req_mngr.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -120,7 +120,7 @@
  *         in \ref psa_status_t
  *
  */
-psa_ps_status_t sst_req_mngr_read_asset_data(uint8_t *out_data, uint32_t size);
+psa_status_t sst_req_mngr_read_asset_data(uint8_t *out_data, uint32_t size);
 
 #ifdef __cplusplus
 }
diff --git a/secure_fw/services/secure_storage/tfm_sst_secure_api.c b/secure_fw/services/secure_storage/tfm_sst_secure_api.c
index 781e84b..4d35c47 100644
--- a/secure_fw/services/secure_storage/tfm_sst_secure_api.c
+++ b/secure_fw/services/secure_storage/tfm_sst_secure_api.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -14,13 +14,12 @@
 #define IOVEC_LEN(x) (sizeof(x)/sizeof(x[0]))
 
 __attribute__((section("SFN")))
-psa_ps_status_t psa_ps_set(psa_ps_uid_t uid,
-                           uint32_t data_length,
-                           const void *p_data,
-                           psa_ps_create_flags_t create_flags)
+psa_status_t psa_ps_set(psa_storage_uid_t uid,
+                        size_t data_length,
+                        const void *p_data,
+                        psa_storage_create_flags_t create_flags)
 {
     psa_status_t status;
-    psa_ps_status_t err;
 #ifdef TFM_PSA_API
     psa_handle_t handle;
 #endif
@@ -31,43 +30,41 @@
         { .base = &create_flags, .len = sizeof(create_flags) }
     };
 
-    psa_outvec out_vec[] = {
-        { .base = &err , .len = sizeof(err) }
-    };
-
 #ifdef TFM_PSA_API
     handle = psa_connect(TFM_SST_SET_SID, TFM_SST_SET_VERSION);
     if (!PSA_HANDLE_IS_VALID(handle)) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec), out_vec,
-                      IOVEC_LEN(out_vec));
+    status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec),
+                      NULL, 0);
 
     psa_close(handle);
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
 #else
     status = tfm_tfm_sst_set_req_veneer(in_vec, IOVEC_LEN(in_vec),
-                                        out_vec, IOVEC_LEN(out_vec));
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
+                                        NULL, 0);
 #endif
 
-    return err;
+   /* A parameter with a buffer pointer pointer that has data length longer
+    * than maximum permitted is treated as a secure violation.
+    * TF-M framework rejects the request with TFM_ERROR_INVALID_PARAMETER.
+    */
+    if (status == (psa_status_t)TFM_ERROR_INVALID_PARAMETER) {
+        return PSA_ERROR_INVALID_ARGUMENT;
+    }
+
+    return status;
 }
 
 __attribute__((section("SFN")))
-psa_ps_status_t psa_ps_get(psa_ps_uid_t uid,
-                           uint32_t data_offset,
-                           uint32_t data_length,
-                           void *p_data)
+psa_status_t psa_ps_get(psa_storage_uid_t uid,
+                        size_t data_offset,
+                        size_t data_size,
+                        void *p_data,
+                        size_t *p_data_length)
 {
     psa_status_t status;
-    psa_ps_status_t err;
 #ifdef TFM_PSA_API
     psa_handle_t handle;
 #endif
@@ -78,14 +75,13 @@
     };
 
     psa_outvec out_vec[] = {
-        { .base = &err,   .len = sizeof(err) },
-        { .base = p_data, .len = data_length }
+        { .base = p_data, .len = data_size }
     };
 
 #ifdef TFM_PSA_API
     handle = psa_connect(TFM_SST_GET_SID, TFM_SST_GET_VERSION);
     if (!PSA_HANDLE_IS_VALID(handle)) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec), out_vec,
@@ -94,24 +90,36 @@
     psa_close(handle);
 
     if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return status;
     }
 #else
     status = tfm_tfm_sst_get_req_veneer(in_vec, IOVEC_LEN(in_vec),
                                         out_vec, IOVEC_LEN(out_vec));
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
+
 #endif
 
-    return err;
+   /* A parameter with a buffer pointer pointer that has data length longer
+    * than maximum permitted is treated as a secure violation.
+    * TF-M framework rejects the request with TFM_ERROR_INVALID_PARAMETER.
+    */
+    if (status == (psa_status_t)TFM_ERROR_INVALID_PARAMETER) {
+        return PSA_ERROR_INVALID_ARGUMENT;
+    }
+
+    if (status != PSA_SUCCESS) {
+        return status;
+    }
+
+    *p_data_length = out_vec[0].len;
+
+    return status;
 }
 
 __attribute__((section("SFN")))
-psa_ps_status_t psa_ps_get_info(psa_ps_uid_t uid, struct psa_ps_info_t *p_info)
+psa_status_t psa_ps_get_info(psa_storage_uid_t uid,
+                             struct psa_storage_info_t *p_info)
 {
     psa_status_t status;
-    psa_ps_status_t err;
 #ifdef TFM_PSA_API
     psa_handle_t handle;
 #endif
@@ -121,14 +129,13 @@
     };
 
     psa_outvec out_vec[] = {
-        { .base = &err,   .len = sizeof(err) },
         { .base = p_info, .len = sizeof(*p_info) }
     };
 
 #ifdef TFM_PSA_API
     handle = psa_connect(TFM_SST_GET_INFO_SID, TFM_SST_GET_INFO_VERSION);
     if (!PSA_HANDLE_IS_VALID(handle)) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec), out_vec,
@@ -136,26 +143,21 @@
 
     psa_close(handle);
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
 #else
     status = tfm_tfm_sst_get_info_req_veneer(in_vec, IOVEC_LEN(in_vec),
                                              out_vec, IOVEC_LEN(out_vec));
-
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
 #endif
 
-    return err;
+    if (status == (psa_status_t)TFM_ERROR_INVALID_PARAMETER) {
+        return PSA_ERROR_INVALID_ARGUMENT;
+    }
+    return status;
 }
 
 __attribute__((section("SFN")))
-psa_ps_status_t psa_ps_remove(psa_ps_uid_t uid)
+psa_status_t psa_ps_remove(psa_storage_uid_t uid)
 {
     psa_status_t status;
-    psa_ps_status_t err;
 #ifdef TFM_PSA_API
     psa_handle_t handle;
 #endif
@@ -164,57 +166,50 @@
         { .base = &uid, .len = sizeof(uid) }
     };
 
-    psa_outvec out_vec[] = {
-        { .base = &err, .len = sizeof(err) }
-    };
-
 #ifdef TFM_PSA_API
     handle = psa_connect(TFM_SST_REMOVE_SID, TFM_SST_REMOVE_VERSION);
     if (!PSA_HANDLE_IS_VALID(handle)) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
-    status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec), out_vec,
-                      IOVEC_LEN(out_vec));
+    status = psa_call(handle, PSA_IPC_CALL, in_vec, IOVEC_LEN(in_vec),
+                      NULL, 0);
 
     psa_close(handle);
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
 #else
     status = tfm_tfm_sst_remove_req_veneer(in_vec, IOVEC_LEN(in_vec),
-                                           out_vec, IOVEC_LEN(out_vec));
+                                           NULL, 0);
 
-    if (status != PSA_SUCCESS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
-    }
 #endif
 
-    return err;
+    if (status == (psa_status_t)TFM_ERROR_INVALID_PARAMETER) {
+        return PSA_ERROR_INVALID_ARGUMENT;
+    }
+    return status;
 }
 
 __attribute__((section("SFN")))
-psa_ps_status_t psa_ps_create(psa_ps_uid_t uid, uint32_t size,
-                              psa_ps_create_flags_t create_flags)
+psa_status_t psa_ps_create(psa_storage_uid_t uid, size_t size,
+                           psa_storage_create_flags_t create_flags)
 {
     (void)uid;
     (void)size;
     (void)create_flags;
 
-    return PSA_PS_ERROR_NOT_SUPPORTED;
+    return PSA_ERROR_NOT_SUPPORTED;
 }
 
 __attribute__((section("SFN")))
-psa_ps_status_t psa_ps_set_extended(psa_ps_uid_t uid, uint32_t data_offset,
-                                    uint32_t data_length, const void *p_data)
+psa_status_t psa_ps_set_extended(psa_storage_uid_t uid, size_t data_offset,
+                                 size_t data_length, const void *p_data)
 {
     (void)uid;
     (void)data_offset;
     (void)data_length;
     (void)p_data;
 
-    return PSA_PS_ERROR_NOT_SUPPORTED;
+    return PSA_ERROR_NOT_SUPPORTED;
 }
 
 __attribute__((section("SFN")))
diff --git a/test/framework/test_framework_helpers.c b/test/framework/test_framework_helpers.c
index 5158c53..8993622 100644
--- a/test/framework/test_framework_helpers.c
+++ b/test/framework/test_framework_helpers.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -9,35 +9,51 @@
 
 #include <stdio.h>
 
-const char *psa_ps_status_to_str(psa_ps_status_t status)
+const char *psa_status_to_str(psa_status_t status)
 {
     switch (status) {
-    case PSA_PS_SUCCESS:
-        return "PSA_PS_SUCCESS";
-    case PSA_PS_ERROR_WRITE_ONCE:
-        return "PSA_PS_ERROR_WRITE_ONCE";
-    case PSA_PS_ERROR_FLAGS_NOT_SUPPORTED:
-        return "PSA_PS_ERROR_FLAGS_NOT_SUPPORTED";
-    case PSA_PS_ERROR_INSUFFICIENT_SPACE:
-        return "PSA_PS_ERROR_INSUFFICIENT_SPACE";
-    case PSA_PS_ERROR_STORAGE_FAILURE:
-        return "PSA_PS_ERROR_STORAGE_FAILURE";
-    case PSA_PS_ERROR_UID_NOT_FOUND:
-        return "PSA_PS_ERROR_UID_NOT_FOUND";
-    case PSA_PS_ERROR_INCORRECT_SIZE:
-        return "PSA_PS_ERROR_INCORRECT_SIZE";
-    case PSA_PS_ERROR_OFFSET_INVALID:
-        return "PSA_PS_ERROR_OFFSET_INVALID";
-    case PSA_PS_ERROR_INVALID_ARGUMENT:
-        return "PSA_PS_ERROR_INVALID_ARGUMENT";
-    case PSA_PS_ERROR_DATA_CORRUPT:
-        return "PSA_PS_ERROR_DATA_CORRUPT";
-    case PSA_PS_ERROR_AUTH_FAILED:
-        return "PSA_PS_ERROR_AUTH_FAILED";
-    case PSA_PS_ERROR_OPERATION_FAILED:
-        return "PSA_PS_ERROR_OPERATION_FAILED";
-    case PSA_PS_ERROR_NOT_SUPPORTED:
-        return "PSA_PS_ERROR_NOT_SUPPORTED";
+    case PSA_SUCCESS:
+        return "PSA_SUCCESS";
+    case PSA_ERROR_PROGRAMMER_ERROR:
+        return "PSA_ERROR_PROGRAMMER_ERROR";
+    case PSA_ERROR_CONNECTION_REFUSED:
+        return "PSA_ERROR_CONNECTION_REFUSED";
+    case PSA_ERROR_CONNECTION_BUSY:
+        return "PSA_ERROR_CONNECTION_BUSY";
+    case PSA_ERROR_GENERIC_ERROR:
+        return "PSA_ERROR_GENERIC_ERROR";
+    case PSA_ERROR_NOT_PERMITTED:
+        return "PSA_ERROR_NOT_PERMITTED";
+    case PSA_ERROR_NOT_SUPPORTED:
+        return "PSA_ERROR_NOT_SUPPORTED";
+    case PSA_ERROR_INVALID_ARGUMENT:
+        return "PSA_ERROR_INVALID_ARGUMENT";
+    case PSA_ERROR_INVALID_HANDLE:
+        return "PSA_ERROR_INVALID_HANDLE";
+    case PSA_ERROR_BAD_STATE:
+        return "PSA_ERROR_BAD_STATE";
+    case PSA_ERROR_BUFFER_TOO_SMALL:
+        return "PSA_ERROR_BUFFER_TOO_SMALL";
+    case PSA_ERROR_ALREADY_EXISTS:
+        return "PSA_ERROR_ALREADY_EXISTS";
+    case PSA_ERROR_DOES_NOT_EXIST:
+        return "PSA_ERROR_DOES_NOT_EXIST";
+    case PSA_ERROR_INSUFFICIENT_MEMORY:
+        return "PSA_ERROR_INSUFFICIENT_MEMORY";
+    case PSA_ERROR_INSUFFICIENT_STORAGE:
+        return "PSA_ERROR_INSUFFICIENT_STORAGE";
+    case PSA_ERROR_INSUFFICIENT_DATA:
+        return "PSA_ERROR_INSUFFICIENT_DATA";
+    case PSA_ERROR_SERVICE_FAILURE:
+        return "PSA_ERROR_SERVICE_FAILURE";
+    case PSA_ERROR_COMMUNICATION_FAILURE:
+        return "PSA_ERROR_COMMUNICATION_FAILURE";
+    case PSA_ERROR_STORAGE_FAILURE:
+        return "PSA_ERROR_STORAGE_FAILURE";
+    case PSA_ERROR_HARDWARE_FAILURE:
+        return "PSA_ERROR_HARDWARE_FAILURE";
+    case PSA_ERROR_INVALID_SIGNATURE:
+        return "PSA_ERROR_INVALID_SIGNATURE";
     default:
         return "Unknown error";
     }
diff --git a/test/framework/test_framework_helpers.h b/test/framework/test_framework_helpers.h
index 8d42fe7..ef6fa5c 100644
--- a/test/framework/test_framework_helpers.h
+++ b/test/framework/test_framework_helpers.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -28,13 +28,13 @@
 };
 
 /**
- * \brief Translates psa_ps_status_t into a string.
+ * \brief Translates psa_status_t into a string.
  *
- * \param[in] status  psa_ps_status_t status value.
+ * \param[in] status  psa_status_t status value.
  *
- * \return psa_ps_status_t as string.
+ * \return psa_status_t as string.
  */
-const char *psa_ps_status_to_str(psa_ps_status_t status);
+const char *psa_status_to_str(psa_status_t status);
 
 /**
  * \brief Translates asset permissions into a string.
diff --git a/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c b/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c
index f2370c0..19af996 100644
--- a/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c
+++ b/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -33,6 +33,8 @@
 #define WRITE_ONCE_DATA_SIZE     (sizeof(WRITE_ONCE_DATA) - 1)
 #define WRITE_ONCE_READ_DATA     "############################################"
 #define WRITE_ONCE_RESULT_DATA   ("####" WRITE_ONCE_DATA "####")
+#define OFFSET_READ_DATA         "HEQUICKBROWNFOXJUMPSOVERALAZYDOG"
+#define OFFSET_RESULT_DATA       ("____" OFFSET_READ_DATA "_____")
 
 #define WRITE_DATA               "THEQUICKBROWNFOXJUMPSOVERALAZYDOG"
 #define WRITE_DATA_SIZE          (sizeof(WRITE_DATA) - 1)
@@ -43,6 +45,7 @@
 
 static const uint8_t write_asset_data[SST_MAX_ASSET_SIZE] = {0xAF};
 static uint8_t read_asset_data[SST_MAX_ASSET_SIZE] = {0};
+static size_t read_asset_data_len = 0;
 
 /* List of tests */
 static void tfm_sst_test_1001(struct test_result_t *ret);
@@ -153,36 +156,36 @@
  */
 TFM_SST_NS_TEST(1001, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = 0;
     const uint8_t write_data[] = {0};
 
     /* Set with no data and no flags and a valid UID */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
 
     /* Attempt to set a second time */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail the second time with valid UID");
         return;
     }
 
     /* Set with an invalid UID */
     status = psa_ps_set(INVALID_UID, data_len, write_data, flags);
-    if (status != PSA_PS_ERROR_INVALID_ARGUMENT) {
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Set should not succeed with an invalid UID");
         return;
     }
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -198,33 +201,34 @@
  */
 TFM_SST_NS_TEST(1002, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     /* Set with no flags */
     status = psa_ps_set(WRITE_ONCE_UID, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with no flags");
         return;
     }
 
-    /* Set with valid flag: PSA_PS_FLAG_WRITE_ONCE (with previously created UID)
+    /* Set with valid flag: PSA_STORAGE_FLAG_WRITE_ONCE
+     * (with previously created UID)
      * Note: Once created, WRITE_ONCE_UID cannot be deleted. It is reused across
      * multiple tests.
      */
     status = psa_ps_set(WRITE_ONCE_UID, WRITE_ONCE_DATA_SIZE, WRITE_ONCE_DATA,
-                        PSA_PS_FLAG_WRITE_ONCE);
-    if (status != PSA_PS_SUCCESS) {
+                        PSA_STORAGE_FLAG_WRITE_ONCE);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid flags (and existing UID)");
         return;
     }
 
     /* Set with invalid flags */
     status = psa_ps_set(uid, data_len, write_data, INVALID_FLAG);
-    if (status != PSA_PS_ERROR_FLAGS_NOT_SUPPORTED) {
+    if (status != PSA_ERROR_NOT_SUPPORTED) {
         TEST_FAIL("Set should not succeed with invalid flags");
         return;
     }
@@ -243,14 +247,14 @@
  */
 TFM_SST_NS_TEST(1003, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = 0;
 
     /* Set with NULL data pointer */
     status = psa_ps_set(uid, data_len, NULL, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should succeed with NULL data pointer and zero length");
         return;
     }
@@ -264,25 +268,27 @@
  */
 TFM_SST_NS_TEST(1004, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = WRITE_ONCE_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = WRITE_ONCE_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t write_len = WRITE_DATA_SIZE;
     const uint32_t read_len = WRITE_ONCE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = WRITE_ONCE_READ_DATA;
+    size_t read_data_len = 0;
 
     /* Set a write once UID a second time */
     status = psa_ps_set(uid, write_len, write_data, flags);
-    if (status != PSA_PS_ERROR_WRITE_ONCE) {
+    if (status != PSA_ERROR_NOT_PERMITTED) {
         TEST_FAIL("Set should not rewrite a write once UID");
         return;
     }
 
     /* Get write once data */
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -303,24 +309,27 @@
  */
 TFM_SST_NS_TEST(1005, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     uint32_t data_len = WRITE_DATA_SIZE;
     uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
+
     const uint8_t *p_read_data = read_data;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Get the entire data */
-    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -338,8 +347,9 @@
     offset = 2;
     data_len -= offset + 2;
 
-    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -366,7 +376,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -381,24 +391,26 @@
  */
 TFM_SST_NS_TEST(1006, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t write_len = WRITE_DATA_SIZE;
     const uint32_t read_len = 0;
     uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     status = psa_ps_set(uid, write_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Get zero data from zero offset */
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail with zero data len");
         return;
     }
@@ -412,8 +424,9 @@
     offset = 5;
 
     /* Get zero data from non-zero offset */
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -426,7 +439,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -441,15 +454,17 @@
  */
 TFM_SST_NS_TEST(1007, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
     const uint32_t data_len = 1;
     const uint32_t offset = 0;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Get with UID that has not yet been set */
-    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get succeeded with non-existant UID");
         return;
     }
@@ -462,8 +477,8 @@
 
     /* Get with invalid UID */
     status = psa_ps_get(INVALID_UID, offset, data_len,
-                        read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_INVALID_ARGUMENT) {
+                        read_data + HALF_PADDING_SIZE, &read_data_len);
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Get succeeded with invalid UID");
         return;
     }
@@ -485,17 +500,18 @@
  */
 TFM_SST_NS_TEST(1008, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t write_len = WRITE_DATA_SIZE;
     uint32_t read_len;
     uint32_t offset;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     status = psa_ps_set(uid, write_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
@@ -504,8 +520,9 @@
     read_len = 1;
     offset = write_len + 1;
 
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_OFFSET_INVALID) {
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Get should not succeed with offset too large");
         return;
     }
@@ -520,14 +537,21 @@
     read_len = write_len + 1;
     offset = 0;
 
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_INCORRECT_SIZE) {
-        TEST_FAIL("Get should not succeed with data length too large");
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
+        TEST_FAIL("Get should succeed with data length larger than UID's "
+                  "length");
+        return;
+    }
+
+    if (read_data_len != write_len) {
+        TEST_FAIL("Read data length should be equal to UID's length");
         return;
     }
 
     /* Check that the read data is unchanged */
-    if (memcmp(read_data, READ_DATA, sizeof(read_data)) != 0) {
+    if (memcmp(read_data, RESULT_DATA, sizeof(read_data)) != 0) {
         TEST_FAIL("Read data should be equal to original read data");
         return;
     }
@@ -538,21 +562,32 @@
     read_len = write_len;
     offset = 1;
 
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_INCORRECT_SIZE) {
-        TEST_FAIL("Get should not succeed with offset + data length too large");
+    /* Reset read_data to original READ_DATA */
+    memcpy(read_data, READ_DATA, sizeof(read_data));
+
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
+        TEST_FAIL("Get should succeed with offset + data length too large, "
+                  "but individually valid");
+        return;
+    }
+
+    if (read_data_len != write_len - offset) {
+        TEST_FAIL("Read data length should be equal to the UID's remaining "
+                  "size starting from offset");
         return;
     }
 
     /* Check that the read data is unchanged */
-    if (memcmp(read_data, READ_DATA, sizeof(read_data)) != 0) {
+    if (memcmp(read_data, OFFSET_RESULT_DATA, sizeof(read_data)) != 0) {
         TEST_FAIL("Read data should be equal to original read data");
         return;
     }
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -571,29 +606,30 @@
  */
 TFM_SST_NS_TEST(1009, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
+    size_t read_data_length = 0;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Get with NULL data pointer */
-    status = psa_ps_get(uid, offset, 0, NULL);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, 0, NULL, &read_data_length);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should succeed with NULL data pointer and zero length");
         return;
     }
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -607,13 +643,13 @@
  */
 TFM_SST_NS_TEST(1010, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = WRITE_ONCE_UID;
-    struct psa_ps_info_t info = {0};
+    psa_status_t status;
+    const psa_storage_uid_t uid = WRITE_ONCE_UID;
+    struct psa_storage_info_t info = {0};
 
     /* Get info for write once UID */
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get info should not fail for write once UID");
         return;
     }
@@ -624,7 +660,7 @@
         return;
     }
 
-    if (info.flags != PSA_PS_FLAG_WRITE_ONCE) {
+    if (info.flags != PSA_STORAGE_FLAG_WRITE_ONCE) {
         TEST_FAIL("Flags incorrect for write once UID");
         return;
     }
@@ -638,22 +674,22 @@
  */
 TFM_SST_NS_TEST(1011, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    struct psa_ps_info_t info = {0};
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    struct psa_storage_info_t info = {0};
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Get info for valid UID */
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get info should not fail with valid UID");
         return;
     }
@@ -671,7 +707,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -686,13 +722,13 @@
  */
 TFM_SST_NS_TEST(1012, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    struct psa_ps_info_t info = {0};
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    struct psa_storage_info_t info = {0};
 
     /* Get info with UID that has not yet been set */
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get info should not succeed with unset UID");
         return;
     }
@@ -710,7 +746,7 @@
 
     /* Get info with invalid UID */
     status = psa_ps_get_info(INVALID_UID, &info);
-    if (status != PSA_PS_ERROR_INVALID_ARGUMENT) {
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Get info should not succeed with invalid UID");
         return;
     }
@@ -735,45 +771,46 @@
  */
 TFM_SST_NS_TEST(1013, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    struct psa_ps_info_t info = {0};
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    struct psa_storage_info_t info = {0};
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Call remove with valid ID */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
 
     /* Check that get info fails for removed UID */
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get info should not succeed with removed UID");
         return;
     }
 
     /* Check that get fails for removed UID */
-    status = psa_ps_get(uid, offset, data_len, read_data);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    status = psa_ps_get(uid, offset, data_len, read_data, &read_data_len);
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get should not succeed with removed UID");
         return;
     }
 
     /* Check that remove fails for removed UID */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Remove should not succeed with removed UID");
         return;
     }
@@ -787,12 +824,12 @@
  */
 TFM_SST_NS_TEST(1014, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = WRITE_ONCE_UID;
+    psa_status_t status;
+    const psa_storage_uid_t uid = WRITE_ONCE_UID;
 
     /* Call remove with write once UID */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_ERROR_WRITE_ONCE) {
+    if (status != PSA_ERROR_NOT_PERMITTED) {
         TEST_FAIL("Remove should not succeed with write once UID");
         return;
     }
@@ -806,12 +843,12 @@
  */
 TFM_SST_NS_TEST(1015, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = INVALID_UID;
+    psa_status_t status;
+    const psa_storage_uid_t uid = INVALID_UID;
 
     /* Call remove with an invalid UID */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_ERROR_INVALID_ARGUMENT) {
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Remove should not succeed with invalid UID");
         return;
     }
@@ -825,14 +862,14 @@
  */
 static void tfm_sst_test_1016_task_1(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid thread name");
         return;
     }
@@ -845,14 +882,15 @@
  */
 static void tfm_sst_test_1016_task_2(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
-    status = psa_ps_get(uid, offset, data_len, read_data);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    status = psa_ps_get(uid, offset, data_len, read_data, &read_data_len);
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get should not succeed with invalid thread name");
         return;
     }
@@ -871,11 +909,11 @@
  */
 static void tfm_sst_test_1016_task_3(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
 
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid thread name");
         return;
     }
@@ -906,14 +944,14 @@
  */
 static void tfm_sst_test_1017_task_1(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid thread name");
         return;
     }
@@ -926,12 +964,12 @@
  */
 static void tfm_sst_test_1017_task_2(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    struct psa_ps_info_t info = {0};
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    struct psa_storage_info_t info = {0};
 
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get info should not succeed with invalid thread name");
         return;
     }
@@ -950,11 +988,11 @@
  */
 static void tfm_sst_test_1017_task_3(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
 
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid thread name");
         return;
     }
@@ -985,14 +1023,14 @@
  */
 static void tfm_sst_test_1018_task_1(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid thread name");
         return;
     }
@@ -1005,11 +1043,11 @@
  */
 static void tfm_sst_test_1018_task_2(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
 
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Remove should not succeed with invalid thread name");
         return;
     }
@@ -1022,11 +1060,11 @@
  */
 static void tfm_sst_test_1018_task_3(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
 
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid thread name");
         return;
     }
@@ -1057,13 +1095,13 @@
  */
 static void tfm_sst_test_1019_task_1(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint8_t write_data[] = "Thread A data";
 
     status = psa_ps_set(uid, sizeof(write_data), write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
@@ -1076,18 +1114,19 @@
  */
 static void tfm_sst_test_1019_task_2(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    struct psa_ps_info_t info = {0};
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    struct psa_storage_info_t info = {0};
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Attempt to access the other thread's UID */
-    status = psa_ps_get(uid, offset, data_len, read_data);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    status = psa_ps_get(uid, offset, data_len, read_data, &read_data_len);
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get should not find another thread's UID");
         return;
     }
@@ -1099,7 +1138,7 @@
     }
 
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get info should not find another thread's UID");
         return;
     }
@@ -1111,20 +1150,21 @@
     }
 
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Remove should not find another thread's UID");
         return;
     }
 
     /* Create the same UID, but belonging to this thread */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
 
-    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail with valid UID");
         return;
     }
@@ -1137,7 +1177,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -1150,18 +1190,20 @@
  */
 static void tfm_sst_test_1019_task_3(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    struct psa_ps_info_t info = {0};
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    struct psa_storage_info_t info = {0};
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = "Thread A data";
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
+
     const uint32_t data_len = sizeof(write_data);
 
     /* Check that first thread can still get info for UID */
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get info should not fail with valid UID");
         return;
     }
@@ -1173,8 +1215,8 @@
     }
 
     /* Check that first thread can still get UID */
-    status = psa_ps_get(uid, offset, data_len, read_data);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, data_len, read_data, &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail with valid UID");
         return;
     }
@@ -1187,7 +1229,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -1218,13 +1260,13 @@
  */
 static void tfm_sst_test_1020_task_1(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint8_t write_data[] = "A";
 
     status = psa_ps_set(uid, sizeof(write_data), write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should succeed for Thread_A");
         return;
     }
@@ -1237,13 +1279,13 @@
  */
 static void tfm_sst_test_1020_task_2(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint8_t write_data[] = "B";
 
     status = psa_ps_set(uid, sizeof(write_data), write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should succeed for Thread_B");
         return;
     }
@@ -1256,13 +1298,13 @@
  */
 static void tfm_sst_test_1020_task_3(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint8_t write_data[] = "HELLO";
 
     status = psa_ps_set(uid, sizeof(write_data), write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Second set should succeed for Thread_A");
         return;
     }
@@ -1275,13 +1317,13 @@
  */
 static void tfm_sst_test_1020_task_4(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint8_t write_data[] = "WORLD_1234";
 
     status = psa_ps_set(uid, sizeof(write_data), write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Second set should succeed for Thread_B");
         return;
     }
@@ -1294,14 +1336,16 @@
  */
 static void tfm_sst_test_1020_task_5(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
     const uint32_t offset = 0;
     const uint8_t write_data[] = "HELLO";
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
-    status = psa_ps_get(uid, offset, sizeof(write_data), read_data);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, sizeof(write_data), read_data,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should succeed for Thread_A");
         return;
     }
@@ -1320,14 +1364,16 @@
  */
 static void tfm_sst_test_1020_task_6(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
     const uint32_t offset = 0;
     const uint8_t write_data[] = "WORLD_1234";
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
-    status = psa_ps_get(uid, offset, sizeof(write_data), read_data);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, sizeof(write_data), read_data,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should succeed for Thread_B");
         return;
     }
@@ -1340,7 +1386,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should work form Thread_B");
         return;
     }
@@ -1353,12 +1399,12 @@
  */
 static void tfm_sst_test_1020_task_7(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should work form Thread_B");
         return;
     }
@@ -1415,26 +1461,27 @@
  */
 TFM_SST_NS_TEST(1021, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid_1 = TEST_UID_2;
-    const psa_ps_uid_t uid_2 = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid_1 = TEST_UID_2;
+    const psa_storage_uid_t uid_2 = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len_2 = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data_1[] = "UID 1 DATA";
     const uint8_t write_data_2[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Set UID 1 */
     status = psa_ps_set(uid_1, sizeof(write_data_1), write_data_1, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail for UID 1");
         return;
     }
 
     /* Set UID 2 */
     status = psa_ps_set(uid_2, data_len_2, write_data_2, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail for UID 2");
         return;
     }
@@ -1443,7 +1490,7 @@
      * the block.
      */
     status = psa_ps_remove(uid_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail for UID 1");
         return;
     }
@@ -1452,8 +1499,8 @@
      * the data from UID 2 correctly.
      */
     status = psa_ps_get(uid_2, offset, data_len_2,
-                        read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+                        read_data + HALF_PADDING_SIZE, &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail for UID 2");
         return;
     }
@@ -1465,7 +1512,7 @@
 
     /* Remove UID 2 to clean up storage for the next test */
     status = psa_ps_remove(uid_2);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail for UID 2");
         return;
     }
@@ -1478,18 +1525,19 @@
  */
 TFM_SST_NS_TEST(1022, "Thread_A")
 {
-    psa_ps_status_t status;
+    psa_status_t status;
     uint32_t i;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Set the entire data into UID */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
@@ -1497,8 +1545,9 @@
     /* Get the data from UID one byte at a time */
     for (i = 0; i < data_len; ++i) {
         status = psa_ps_get(uid, offset, 1,
-                            (read_data + HALF_PADDING_SIZE + i));
-        if (status != PSA_PS_SUCCESS) {
+                            (read_data + HALF_PADDING_SIZE + i),
+                             &read_data_len);
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Get should not fail for partial read");
             return;
         }
@@ -1513,7 +1562,7 @@
 
     /* Remove UID to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail");
         return;
     }
@@ -1526,38 +1575,40 @@
  */
 TFM_SST_NS_TEST(1023, "Thread_A")
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t offset = 0;
     const uint8_t write_data_1[] = "ONE";
     const uint8_t write_data_2[] = "TWO";
     const uint8_t write_data_3[] = "THREE";
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Set write data 1 into UID */
     status = psa_ps_set(uid, sizeof(write_data_1), write_data_1, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("First set should not fail");
         return;
     }
 
     /* Set write data 2 into UID */
     status = psa_ps_set(uid, sizeof(write_data_2), write_data_2, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Second set should not fail");
         return;
     }
 
     /* Set write data 3 into UID */
     status = psa_ps_set(uid, sizeof(write_data_3), write_data_3, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Third set should not fail");
         return;
     }
 
-    status = psa_ps_get(uid, offset, sizeof(write_data_3), read_data);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, sizeof(write_data_3), read_data,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -1570,7 +1621,7 @@
 
     /* Remove UID to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail");
         return;
     }
@@ -1603,8 +1654,8 @@
 TFM_SST_NS_TEST(1025, "Thread_A")
 {
     uint8_t cycle;
-    psa_ps_status_t status;
-    const psa_ps_uid_t test_uid[TEST_1025_CYCLES] = {
+	psa_status_t status;
+    const psa_storage_uid_t test_uid[TEST_1025_CYCLES] = {
         TEST_UID_1,
         TEST_UID_2,
         TEST_UID_3};
@@ -1616,8 +1667,8 @@
     /* Loop to test different asset sizes and UID's*/
     for (cycle = 0; cycle < TEST_1025_CYCLES; cycle++) {
         uint32_t data_size = test_asset_sizes[cycle];
-        psa_ps_uid_t uid = test_uid[cycle];
-        struct psa_ps_info_t info = {0};
+        psa_storage_uid_t uid = test_uid[cycle];
+        struct psa_storage_info_t info = {0};
 
         memset(read_asset_data, 0x00, sizeof(read_asset_data));
 
@@ -1625,15 +1676,15 @@
         status = psa_ps_set(uid,
                             data_size,
                             write_asset_data,
-                            PSA_PS_FLAG_NONE);
-        if (status != PSA_PS_SUCCESS) {
+                            PSA_STORAGE_FLAG_NONE);
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Set should not fail with valid UID");
             return;
         }
 
         /* Get info for valid UID */
         status = psa_ps_get_info(uid, &info);
-        if (status != PSA_PS_SUCCESS) {
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Get info should not fail with valid UID");
             return;
         }
@@ -1644,14 +1695,15 @@
             return;
         }
 
-        if (info.flags != PSA_PS_FLAG_NONE) {
+        if (info.flags != PSA_STORAGE_FLAG_NONE) {
             TEST_FAIL("Flags incorrect for valid UID");
             return;
         }
 
         /* Check that thread can still get UID */
-        status = psa_ps_get(uid, 0, data_size, read_asset_data);
-        if (status != PSA_PS_SUCCESS) {
+        status = psa_ps_get(uid, 0, data_size, read_asset_data,
+                            &read_asset_data_len);
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Get should not fail with valid UID");
             return;
         }
@@ -1664,7 +1716,7 @@
 
         /* Call remove to clean up storage for the next test */
         status = psa_ps_remove(uid);
-        if (status != PSA_PS_SUCCESS) {
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Remove should not fail with valid UID");
             return;
         }
diff --git a/test/suites/sst/secure/nv_counters/test_sst_nv_counters.c b/test/suites/sst/secure/nv_counters/test_sst_nv_counters.c
index db5a2d2..5a2b4d1 100644
--- a/test/suites/sst/secure/nv_counters/test_sst_nv_counters.c
+++ b/test/suites/sst/secure/nv_counters/test_sst_nv_counters.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -35,7 +35,7 @@
 }
 
 /* Implementation of SST NV counter interfaces defined by sst_nv_counters.h */
-psa_ps_status_t sst_init_nv_counter(void)
+psa_status_t sst_init_nv_counter(void)
 {
     static uint8_t is_init = 0;
 
@@ -46,46 +46,46 @@
         is_init = 1;
     }
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
-                                    uint32_t *val)
+psa_status_t sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
+                                 uint32_t *val)
 {
     uint32_t nv_pos;
 
     nv_pos = get_nv_counter_position(counter_id);
     if (nv_pos >= TOTAL_SST_NV_COUNTERS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Reads counter value */
     *val = test_nv_counters[nv_pos];
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t sst_increment_nv_counter(enum tfm_nv_counter_t counter_id)
+psa_status_t sst_increment_nv_counter(enum tfm_nv_counter_t counter_id)
 {
     uint32_t nv_pos;
 
     if (nv_increment_status == DISABLE_INCREMENT) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     nv_pos = get_nv_counter_position(counter_id);
     if (nv_pos >= TOTAL_SST_NV_COUNTERS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     if (test_nv_counters[nv_pos] == UINT32_MAX) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Increments counter value */
     test_nv_counters[nv_pos]++;
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
 /* Implementation of SST NV counter interfaces defined by
@@ -101,48 +101,48 @@
     nv_increment_status = ENABLE_INCREMENT;
 }
 
-psa_ps_status_t test_sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
-                                         uint32_t *val)
+psa_status_t test_sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
+                                      uint32_t *val)
 {
     return sst_read_nv_counter(counter_id, val);
 }
 
-psa_ps_status_t test_sst_increment_nv_counter(enum tfm_nv_counter_t counter_id)
+psa_status_t test_sst_increment_nv_counter(enum tfm_nv_counter_t counter_id)
 {
     return sst_increment_nv_counter(counter_id);
 }
 
-psa_ps_status_t test_sst_decrement_nv_counter(enum tfm_nv_counter_t counter_id)
+psa_status_t test_sst_decrement_nv_counter(enum tfm_nv_counter_t counter_id)
 {
     uint32_t nv_pos;
 
     nv_pos = get_nv_counter_position(counter_id);
     if (nv_pos >= TOTAL_SST_NV_COUNTERS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     if (test_nv_counters[nv_pos] == 0) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Decrements counter value */
     test_nv_counters[nv_pos]--;
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
 
-psa_ps_status_t test_sst_set_nv_counter(enum tfm_nv_counter_t counter_id,
-                                        uint32_t value)
+psa_status_t test_sst_set_nv_counter(enum tfm_nv_counter_t counter_id,
+                                     uint32_t value)
 {
     uint32_t nv_pos;
 
     nv_pos = get_nv_counter_position(counter_id);
     if (nv_pos >= TOTAL_SST_NV_COUNTERS) {
-        return PSA_PS_ERROR_OPERATION_FAILED;
+        return PSA_ERROR_GENERIC_ERROR;
     }
 
     /* Sets counter value */
     test_nv_counters[nv_pos] = value;
 
-    return PSA_PS_SUCCESS;
+    return PSA_SUCCESS;
 }
diff --git a/test/suites/sst/secure/nv_counters/test_sst_nv_counters.h b/test/suites/sst/secure/nv_counters/test_sst_nv_counters.h
index b1b85ab..dafba3d 100644
--- a/test/suites/sst/secure/nv_counters/test_sst_nv_counters.h
+++ b/test/suites/sst/secure/nv_counters/test_sst_nv_counters.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -22,10 +22,10 @@
  * \param[in]  counter_id  NV counter ID.
  * \param[out] val         Pointer to store the current NV counter value.
  *
- * \return  PSA_PS_SUCCESS if the value is read correctly, otherwise
- *          PSA_PS_ERROR_OPERATION_FAILED
+ * \return  PSA_SUCCESS if the value is read correctly, otherwise
+ *          PSA_ERROR_GENERIC_ERROR
  */
-psa_ps_status_t test_sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
+psa_status_t test_sst_read_nv_counter(enum tfm_nv_counter_t counter_id,
                                          uint32_t *val);
 
 /**
@@ -34,10 +34,10 @@
  * \param[in] counter_id  NV counter ID.
  *
  * \return  When the NV counter reaches its maximum value, the
- *          PSA_PS_ERROR_OPERATION_FAILED error is returned to indicate the
- *          value cannot be incremented. Otherwise, PSA_PS_SUCCESS.
+ *          PSA_ERROR_GENERIC_ERROR error is returned to indicate the
+ *          value cannot be incremented. Otherwise, PSA_SUCCESS.
  */
-psa_ps_status_t test_sst_increment_nv_counter(enum tfm_nv_counter_t counter_id);
+psa_status_t test_sst_increment_nv_counter(enum tfm_nv_counter_t counter_id);
 
 /**
  * \brief Decrements the given non-volatile (NV) counter.
@@ -45,14 +45,14 @@
  * \param[in] counter_id  NV counter ID.
  *
  * \return  When the NV counter reaches its minimum value, the
- *          PSA_PS_ERROR_OPERATION_FAILED error is returned to indicate the
- *          value cannot be decremented. Otherwise, PSA_PS_SUCCESS.
+ *          PSA_ERROR_GENERIC_ERROR error is returned to indicate the
+ *          value cannot be decremented. Otherwise, PSA_SUCCESS.
  */
-psa_ps_status_t test_sst_decrement_nv_counter(enum tfm_nv_counter_t counter_id);
+psa_status_t test_sst_decrement_nv_counter(enum tfm_nv_counter_t counter_id);
 
 /**
  * \brief Disables SST increment nv counter function to force
- *        PSA_PS_ERROR_OPERATION_FAILED return value as an indication that NV
+ *        PSA_ERROR_GENERIC_ERROR return value as an indication that NV
  *        counter reaches its maximum value.
  */
 void test_sst_disable_increment_nv_counter(void);
@@ -69,15 +69,14 @@
  * \param[in] value       New NV counter value.
  *
  * \return  When the NV counter reaches its maximum value, the
- *          PSA_PS_ERROR_OPERATION_FAILED error is returned to indicate the
- *          value cannot be set. Otherwise, PSA_PS_SUCCESS.
+ *          PSA_ERROR_GENERIC_ERROR error is returned to indicate the
+ *          value cannot be set. Otherwise, PSA_SUCCESS.
  */
-psa_ps_status_t test_sst_set_nv_counter(enum tfm_nv_counter_t counter_id,
-                                        uint32_t value);
+psa_status_t test_sst_set_nv_counter(enum tfm_nv_counter_t counter_id,
+                                     uint32_t value);
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* __TEST_SST_NV_COUNTERS_H__ */
-
diff --git a/test/suites/sst/secure/psa_ps_s_interface_testsuite.c b/test/suites/sst/secure/psa_ps_s_interface_testsuite.c
index 102e7a5..5cc4985 100644
--- a/test/suites/sst/secure/psa_ps_s_interface_testsuite.c
+++ b/test/suites/sst/secure/psa_ps_s_interface_testsuite.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -38,11 +38,14 @@
 #define WRITE_DATA_SIZE          (sizeof(WRITE_DATA) - 1)
 #define READ_DATA                "_________________________________________"
 #define RESULT_DATA              ("____" WRITE_DATA "____")
+#define OFFSET_READ_DATA         "HEQUICKBROWNFOXJUMPSOVERALAZYDOG"
+#define OFFSET_RESULT_DATA       ("____" OFFSET_READ_DATA "_____")
 
 #define TEST_1022_CYCLES         3U
 
 static const uint8_t write_asset_data[SST_MAX_ASSET_SIZE] = {0xBF};
 static uint8_t read_asset_data[SST_MAX_ASSET_SIZE] = {0};
+static size_t read_asset_datal_len = 0;
 
 /* List of tests */
 static void tfm_sst_test_2001(struct test_result_t *ret);
@@ -139,36 +142,36 @@
  */
 static void tfm_sst_test_2001(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = 0;
     const uint8_t write_data[] = {0};
 
     /* Set with no data and no flags and a valid UID */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
 
     /* Attempt to set a second time */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail the second time with valid UID");
         return;
     }
 
     /* Set with an invalid UID */
     status = psa_ps_set(INVALID_UID, data_len, write_data, flags);
-    if (status != PSA_PS_ERROR_INVALID_ARGUMENT) {
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Set should not succeed with an invalid UID");
         return;
     }
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -184,33 +187,34 @@
  */
 static void tfm_sst_test_2002(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     /* Set with no flags */
     status = psa_ps_set(WRITE_ONCE_UID, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with no flags");
         return;
     }
 
-    /* Set with valid flag: PSA_PS_FLAG_WRITE_ONCE (with previously created UID)
+    /* Set with valid flag: PSA_STORAGE_FLAG_WRITE_ONCE
+     * (with previously created UID)
      * Note: Once created, WRITE_ONCE_UID cannot be deleted. It is reused across
      * multiple tests.
      */
     status = psa_ps_set(WRITE_ONCE_UID, WRITE_ONCE_DATA_SIZE, WRITE_ONCE_DATA,
-                        PSA_PS_FLAG_WRITE_ONCE);
-    if (status != PSA_PS_SUCCESS) {
+                        PSA_STORAGE_FLAG_WRITE_ONCE);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid flags (and existing UID)");
         return;
     }
 
     /* Set with invalid flags */
     status = psa_ps_set(uid, data_len, write_data, INVALID_FLAG);
-    if (status != PSA_PS_ERROR_FLAGS_NOT_SUPPORTED) {
+    if (status != PSA_ERROR_NOT_SUPPORTED) {
         TEST_FAIL("Set should not succeed with invalid flags");
         return;
     }
@@ -229,14 +233,14 @@
  */
 static void tfm_sst_test_2003(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = 0;
 
     /* Set with NULL data pointer */
     status = psa_ps_set(uid, data_len, NULL, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should succeed with NULL data pointer and zero length");
         return;
     }
@@ -251,9 +255,9 @@
 static void tfm_sst_test_2004(struct test_result_t *ret)
 {
 #ifndef TFM_PSA_API
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = INVALID_DATA_LEN;
     const uint8_t write_data[] = WRITE_DATA;
 
@@ -261,12 +265,12 @@
      * maximum permitted, it is treated as a secure violation.
      * TF-M framework rejects the request with a proper error code.
      * The SST secure PSA PS implementation returns
-     * PSA_PS_ERROR_OPERATION_FAILED in that case.
+     * PSA_ERROR_INVALID_ARGUMENT in that case.
      */
 
     /* Set with data length longer than the maximum supported */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_ERROR_OPERATION_FAILED) {
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Set should not succeed with invalid data length");
         return;
     }
@@ -281,25 +285,27 @@
  */
 static void tfm_sst_test_2005(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = WRITE_ONCE_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = WRITE_ONCE_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t write_len = WRITE_DATA_SIZE;
     const uint32_t read_len = WRITE_ONCE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = WRITE_ONCE_READ_DATA;
+    size_t read_data_len = 0;
 
     /* Set a write once UID a second time */
     status = psa_ps_set(uid, write_len, write_data, flags);
-    if (status != PSA_PS_ERROR_WRITE_ONCE) {
+    if (status != PSA_ERROR_NOT_PERMITTED) {
         TEST_FAIL("Set should not rewrite a write once UID");
         return;
     }
 
     /* Get write once data */
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -320,24 +326,26 @@
  */
 static void tfm_sst_test_2006(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     uint32_t data_len = WRITE_DATA_SIZE;
     uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
     const uint8_t *p_read_data = read_data;
+    size_t read_data_len = 0;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Get the entire data */
-    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -355,8 +363,9 @@
     offset = 2;
     data_len -= offset + 2;
 
-    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -383,7 +392,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -398,24 +407,26 @@
  */
 static void tfm_sst_test_2007(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t write_len = WRITE_DATA_SIZE;
     const uint32_t read_len = 0;
     uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     status = psa_ps_set(uid, write_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Get zero data from zero offset */
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail with zero data len");
         return;
     }
@@ -429,8 +440,9 @@
     offset = 5;
 
     /* Get zero data from non-zero offset */
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -443,7 +455,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -458,15 +470,17 @@
  */
 static void tfm_sst_test_2008(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
     const uint32_t data_len = 1;
     const uint32_t offset = 0;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Get with UID that has not yet been set */
-    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    status = psa_ps_get(uid, offset, data_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get succeeded with non-existant UID");
         return;
     }
@@ -479,8 +493,8 @@
 
     /* Get with invalid UID */
     status = psa_ps_get(INVALID_UID, offset, data_len,
-                        read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_INVALID_ARGUMENT) {
+                        read_data + HALF_PADDING_SIZE, &read_data_len);
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Get succeeded with invalid UID");
         return;
     }
@@ -503,17 +517,18 @@
  */
 static void tfm_sst_test_2009(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t write_len = WRITE_DATA_SIZE;
     uint32_t read_len;
     uint32_t offset;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     status = psa_ps_set(uid, write_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
@@ -522,8 +537,9 @@
     read_len = 1;
     offset = write_len + 1;
 
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_OFFSET_INVALID) {
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Get should not succeed with offset too large");
         return;
     }
@@ -538,14 +554,21 @@
     read_len = write_len + 1;
     offset = 0;
 
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_INCORRECT_SIZE) {
-        TEST_FAIL("Get should not succeed with data length too large");
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
+        TEST_FAIL("Get should succeed with data length larger than UID's "
+                  "length");
+        return;
+    }
+
+    if (read_data_len != write_len) {
+        TEST_FAIL("Read data length should be equal to UID's length");
         return;
     }
 
     /* Check that the read data is unchanged */
-    if (tfm_memcmp(read_data, READ_DATA, sizeof(read_data)) != 0) {
+    if (tfm_memcmp(read_data, RESULT_DATA, sizeof(read_data)) != 0) {
         TEST_FAIL("Read data should be equal to original read data");
         return;
     }
@@ -556,14 +579,25 @@
     read_len = write_len;
     offset = 1;
 
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_INCORRECT_SIZE) {
-        TEST_FAIL("Get should not succeed with offset + data length too large");
+    /* Reset read_data to original READ_DATA */
+    tfm_memcpy(read_data, READ_DATA, sizeof(read_data));
+
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
+        TEST_FAIL("Get should succeed with offset + data length too large, "
+                  "but individually valid");
+        return;
+    }
+
+    if (read_data_len != write_len - offset) {
+        TEST_FAIL("Read data length should be equal to the UID's remaining "
+                  "size starting from offset");
         return;
     }
 
     /* Check that the read data is unchanged */
-    if (tfm_memcmp(read_data, READ_DATA, sizeof(read_data)) != 0) {
+    if (tfm_memcmp(read_data, OFFSET_RESULT_DATA, sizeof(read_data)) != 0) {
         TEST_FAIL("Read data should be equal to original read data");
         return;
     }
@@ -573,15 +607,19 @@
     read_len = INVALID_DATA_LEN;
     offset = INVALID_OFFSET;
 
+    /* Reset read_data to original READ_DATA */
+    tfm_memcpy(read_data, READ_DATA, sizeof(read_data));
+
     /* A parameter with a buffer pointer where its data length is longer than
      * maximum permitted, it is treated as a secure violation.
      * TF-M framework rejects the request with a proper error code.
      * The SST secure PSA PS implementation returns
-     * PSA_PS_ERROR_OPERATION_FAILED in that case.
+     * PSA_ERROR_INVALID_ARGUMENT in that case.
      */
 
-    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_ERROR_OPERATION_FAILED) {
+    status = psa_ps_get(uid, offset, read_len, read_data + HALF_PADDING_SIZE,
+                        &read_data_len);
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Get should not succeed with invalid arguments");
         return;
     }
@@ -595,7 +633,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -614,29 +652,29 @@
  */
 static void tfm_sst_test_2010(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Get with NULL data pointer */
-    status = psa_ps_get(uid, offset, 0, NULL);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, 0, NULL, NULL);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should succeed with NULL data pointer and zero length");
         return;
     }
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -650,13 +688,13 @@
  */
 static void tfm_sst_test_2011(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = WRITE_ONCE_UID;
-    struct psa_ps_info_t info = {0};
+    psa_status_t status;
+    const psa_storage_uid_t uid = WRITE_ONCE_UID;
+    struct psa_storage_info_t info = {0};
 
     /* Get info for write once UID */
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get info should not fail for write once UID");
         return;
     }
@@ -667,7 +705,7 @@
         return;
     }
 
-    if (info.flags != PSA_PS_FLAG_WRITE_ONCE) {
+    if (info.flags != PSA_STORAGE_FLAG_WRITE_ONCE) {
         TEST_FAIL("Flags incorrect for write once UID");
         return;
     }
@@ -681,22 +719,22 @@
  */
 static void tfm_sst_test_2012(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    struct psa_ps_info_t info = {0};
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    struct psa_storage_info_t info = {0};
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Get info for valid UID */
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get info should not fail with valid UID");
         return;
     }
@@ -714,7 +752,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -729,13 +767,13 @@
  */
 static void tfm_sst_test_2013(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    struct psa_ps_info_t info = {0};
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    struct psa_storage_info_t info = {0};
 
     /* Get info with UID that has not yet been set */
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get info should not succeed with unset UID");
         return;
     }
@@ -753,7 +791,7 @@
 
     /* Get info with invalid UID */
     status = psa_ps_get_info(INVALID_UID, &info);
-    if (status != PSA_PS_ERROR_INVALID_ARGUMENT) {
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Get info should not succeed with invalid UID");
         return;
     }
@@ -778,14 +816,14 @@
  */
 static void tfm_sst_test_2014(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
@@ -793,13 +831,13 @@
     /* A parameter with a null pointer is treated as a secure violation.
      * TF-M framework rejects the request with a proper error code.
      * The SST secure PSA PS implementation returns
-     * PSA_PS_ERROR_OPERATION_FAILED in that case.
+     * PSA_ERROR_GENERIC_ERROR in that case.
      */
 
     /* Get info with NULL info pointer */
 #ifndef TFM_PSA_API
     status = psa_ps_get_info(uid, NULL);
-    if (status != PSA_PS_ERROR_OPERATION_FAILED) {
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Get info should not succeed with NULL info pointer");
         return;
     }
@@ -807,7 +845,7 @@
 
     /* Call remove to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -821,45 +859,46 @@
  */
 static void tfm_sst_test_2015(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    struct psa_ps_info_t info = {0};
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    struct psa_storage_info_t info = {0};
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
 
     /* Call remove with valid ID */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
 
     /* Check that get info fails for removed UID */
     status = psa_ps_get_info(uid, &info);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get info should not succeed with removed UID");
         return;
     }
 
     /* Check that get fails for removed UID */
-    status = psa_ps_get(uid, offset, data_len, read_data);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    status = psa_ps_get(uid, offset, data_len, read_data, &read_data_len);
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Get should not succeed with removed UID");
         return;
     }
 
     /* Check that remove fails for removed UID */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_ERROR_UID_NOT_FOUND) {
+    if (status != PSA_ERROR_DOES_NOT_EXIST) {
         TEST_FAIL("Remove should not succeed with removed UID");
         return;
     }
@@ -873,12 +912,12 @@
  */
 static void tfm_sst_test_2016(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = WRITE_ONCE_UID;
+    psa_status_t status;
+    const psa_storage_uid_t uid = WRITE_ONCE_UID;
 
     /* Call remove with write once UID */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_ERROR_WRITE_ONCE) {
+    if (status != PSA_ERROR_NOT_PERMITTED) {
         TEST_FAIL("Remove should not succeed with write once UID");
         return;
     }
@@ -892,12 +931,12 @@
  */
 static void tfm_sst_test_2017(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = INVALID_UID;
+    psa_status_t status;
+    const psa_storage_uid_t uid = INVALID_UID;
 
     /* Call remove with an invalid UID */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_ERROR_INVALID_ARGUMENT) {
+    if (status != PSA_ERROR_INVALID_ARGUMENT) {
         TEST_FAIL("Remove should not succeed with invalid UID");
         return;
     }
@@ -914,26 +953,27 @@
  */
 static void tfm_sst_test_2018(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid_1 = TEST_UID_2;
-    const psa_ps_uid_t uid_2 = TEST_UID_3;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid_1 = TEST_UID_2;
+    const psa_storage_uid_t uid_2 = TEST_UID_3;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len_2 = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data_1[] = "UID 1 DATA";
     const uint8_t write_data_2[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Set UID 1 */
     status = psa_ps_set(uid_1, sizeof(write_data_1), write_data_1, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail for UID 1");
         return;
     }
 
     /* Set UID 2 */
     status = psa_ps_set(uid_2, data_len_2, write_data_2, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail for UID 2");
         return;
     }
@@ -942,7 +982,7 @@
      * the block.
      */
     status = psa_ps_remove(uid_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail for UID 1");
         return;
     }
@@ -951,8 +991,8 @@
      * the data from UID 2 correctly.
      */
     status = psa_ps_get(uid_2, offset, data_len_2,
-                        read_data + HALF_PADDING_SIZE);
-    if (status != PSA_PS_SUCCESS) {
+                        read_data + HALF_PADDING_SIZE, &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail for UID 2");
         return;
     }
@@ -964,7 +1004,7 @@
 
     /* Remove UID 2 to clean up storage for the next test */
     status = psa_ps_remove(uid_2);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail for UID 2");
         return;
     }
@@ -977,18 +1017,19 @@
  */
 static void tfm_sst_test_2019(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
+    psa_status_t status;
     uint32_t i;
-    const psa_ps_uid_t uid = TEST_UID_1;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    const psa_storage_uid_t uid = TEST_UID_1;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Set the entire data into UID */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail");
         return;
     }
@@ -996,8 +1037,9 @@
     /* Get the data from UID one byte at a time */
     for (i = 0; i < data_len; ++i) {
         status = psa_ps_get(uid, offset, 1,
-                            (read_data + HALF_PADDING_SIZE + i));
-        if (status != PSA_PS_SUCCESS) {
+                            (read_data + HALF_PADDING_SIZE + i),
+                             &read_data_len);
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Get should not fail for partial read");
             return;
         }
@@ -1012,7 +1054,7 @@
 
     /* Remove UID to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail");
         return;
     }
@@ -1025,38 +1067,40 @@
  */
 static void tfm_sst_test_2020(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID_2;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID_2;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t offset = 0;
     const uint8_t write_data_1[] = "ONE";
     const uint8_t write_data_2[] = "TWO";
     const uint8_t write_data_3[] = "THREE";
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Set write data 1 into UID */
     status = psa_ps_set(uid, sizeof(write_data_1), write_data_1, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("First set should not fail");
         return;
     }
 
     /* Set write data 2 into UID */
     status = psa_ps_set(uid, sizeof(write_data_2), write_data_2, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Second set should not fail");
         return;
     }
 
     /* Set write data 3 into UID */
     status = psa_ps_set(uid, sizeof(write_data_3), write_data_3, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Third set should not fail");
         return;
     }
 
-    status = psa_ps_get(uid, offset, sizeof(write_data_3), read_data);
-    if (status != PSA_PS_SUCCESS) {
+    status = psa_ps_get(uid, offset, sizeof(write_data_3), read_data,
+                        &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -1069,7 +1113,7 @@
 
     /* Remove UID to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail");
         return;
     }
@@ -1102,8 +1146,8 @@
 static void tfm_sst_test_2022(struct test_result_t *ret)
 {
     uint8_t cycle;
-    psa_ps_status_t status;
-    const psa_ps_uid_t test_uid[TEST_1022_CYCLES] = {
+    psa_status_t status;
+    const psa_storage_uid_t test_uid[TEST_1022_CYCLES] = {
         TEST_UID_1,
         TEST_UID_2,
         TEST_UID_3};
@@ -1115,8 +1159,8 @@
     /* Loop to test different asset sizes and UID's*/
     for (cycle = 0; cycle < TEST_1022_CYCLES; cycle++) {
         uint32_t data_size = test_asset_sizes[cycle];
-        psa_ps_uid_t uid = test_uid[cycle];
-        struct psa_ps_info_t info = {0};
+        psa_storage_uid_t uid = test_uid[cycle];
+        struct psa_storage_info_t info = {0};
 
         tfm_memset(read_asset_data, 0x00, sizeof(read_asset_data));
 
@@ -1124,15 +1168,15 @@
         status = psa_ps_set(uid,
                             data_size,
                             write_asset_data,
-                            PSA_PS_FLAG_NONE);
-        if (status != PSA_PS_SUCCESS) {
+                            PSA_STORAGE_FLAG_NONE);
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Set should not fail with valid UID");
             return;
         }
 
         /* Get info for valid UID */
         status = psa_ps_get_info(uid, &info);
-        if (status != PSA_PS_SUCCESS) {
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Get info should not fail with valid UID");
             return;
         }
@@ -1143,14 +1187,15 @@
             return;
         }
 
-        if (info.flags != PSA_PS_FLAG_NONE) {
+        if (info.flags != PSA_STORAGE_FLAG_NONE) {
             TEST_FAIL("Flags incorrect for valid UID");
             return;
         }
 
         /* Check that thread can still get UID */
-        status = psa_ps_get(uid, 0, data_size, read_asset_data);
-        if (status != PSA_PS_SUCCESS) {
+        status = psa_ps_get(uid, 0, data_size, read_asset_data,
+                            &read_asset_datal_len);
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Get should not fail with valid UID");
             return;
         }
@@ -1163,7 +1208,7 @@
 
         /* Call remove to clean up storage for the next test */
         status = psa_ps_remove(uid);
-        if (status != PSA_PS_SUCCESS) {
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Remove should not fail with valid UID");
             return;
         }
diff --git a/test/suites/sst/secure/psa_ps_s_reliability_testsuite.c b/test/suites/sst/secure/psa_ps_s_reliability_testsuite.c
index 417a02f..4fbcabd 100644
--- a/test/suites/sst/secure/psa_ps_s_reliability_testsuite.c
+++ b/test/suites/sst/secure/psa_ps_s_reliability_testsuite.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -55,29 +55,31 @@
  */
 static void tfm_sst_test_3001(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     uint32_t itr;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     for (itr = 0; itr < LOOP_ITERATIONS_001; itr++) {
         TEST_LOG("  > Iteration %d of %d\r", itr + 1, LOOP_ITERATIONS_001);
 
         /* Set a data in the asset */
         status = psa_ps_set(uid, data_len, write_data, flags);
-        if (status != PSA_PS_SUCCESS) {
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Set should not fail with valid UID");
             return;
         }
 
         /* Get data from the asset */
         status = psa_ps_get(uid, offset, data_len, (read_data +
-                                                    HALF_PADDING_SIZE));
-        if (status != PSA_PS_SUCCESS) {
+                                                    HALF_PADDING_SIZE),
+                                                    &read_data_len);
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Get should not fail");
             return;
         }
@@ -96,7 +98,7 @@
 
     /* Remove the asset to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -109,29 +111,31 @@
  */
 static void tfm_sst_test_3002(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     uint32_t itr;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     for (itr = 0; itr < LOOP_ITERATIONS_002; itr++) {
         TEST_LOG("  > Iteration %d of %d\r", itr + 1, LOOP_ITERATIONS_002);
 
         /* Set a data in the asset */
         status = psa_ps_set(uid, data_len, write_data, flags);
-        if (status != PSA_PS_SUCCESS) {
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Set should not fail with valid UID");
             return;
         }
 
         /* Get data from the asset */
         status = psa_ps_get(uid, offset, data_len, (read_data +
-                                                    HALF_PADDING_SIZE));
-        if (status != PSA_PS_SUCCESS) {
+                                                    HALF_PADDING_SIZE),
+                                                    &read_data_len);
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Get should not fail");
             return;
         }
@@ -144,7 +148,7 @@
 
         /* Remove the asset from the secure storage */
         status = psa_ps_remove(uid);
-        if (status != PSA_PS_SUCCESS) {
+        if (status != PSA_SUCCESS) {
             TEST_FAIL("Remove should not fail with valid UID");
             return;
         }
diff --git a/test/suites/sst/secure/sst_rollback_protection_testsuite.c b/test/suites/sst/secure/sst_rollback_protection_testsuite.c
index de96fdb..9c31d16 100644
--- a/test/suites/sst/secure/sst_rollback_protection_testsuite.c
+++ b/test/suites/sst/secure/sst_rollback_protection_testsuite.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2020, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -105,32 +105,33 @@
  */
 static void tfm_sst_test_4001(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     uint32_t old_nvc_1, nvc_1, nvc_2, nvc_3;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Creates an asset in the SST area to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
 
     /* Reads NV counter 1 to get the saved value to compare it later */
     status = test_sst_read_nv_counter(TFM_SST_NV_COUNTER_1, &old_nvc_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Read should not fail");
         return;
     }
 
     /* Sets new data in the asset to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
@@ -141,7 +142,7 @@
 
     /* Reads NV counter 1 to get the current value */
     status = test_sst_read_nv_counter(TFM_SST_NV_COUNTER_1, &nvc_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Read should not fail");
         return;
     }
@@ -156,7 +157,7 @@
 
     /* Reads NV counter 2 to get the current value */
     status = test_sst_read_nv_counter(TFM_SST_NV_COUNTER_2, &nvc_2);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Read should not fail");
         return;
     }
@@ -168,7 +169,7 @@
 
     /* Reads NV counter 3 to get the current value */
     status = test_sst_read_nv_counter(TFM_SST_NV_COUNTER_3, &nvc_3);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Read should not fail");
         return;
     }
@@ -185,15 +186,16 @@
      * the SST area authentication is aligned with those values.
      */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("AM prepare should not fail");
         return;
     }
 
     /* Gets data from the asset */
     status = psa_ps_get(uid, offset, data_len, (read_data +
-                                                HALF_PADDING_SIZE));
-    if (status != PSA_PS_SUCCESS) {
+                                                HALF_PADDING_SIZE),
+                                                &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -206,7 +208,7 @@
 
     /* Removes the asset to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -220,34 +222,34 @@
  */
 static void tfm_sst_test_4002(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     /* Creates an asset in the SST area to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
 
     /* Increments all counters to make that SST area version old/invalid */
     status = test_sst_increment_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Increment should not fail");
         return;
     }
 
     status = test_sst_increment_nv_counter(TFM_SST_NV_COUNTER_2);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Increment should not fail");
         return;
     }
 
     status = test_sst_increment_nv_counter(TFM_SST_NV_COUNTER_3);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Increment should not fail");
         return;
     }
@@ -259,7 +261,7 @@
      * NV counters values.
      */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_ERROR_OPERATION_FAILED) {
+    if (status != PSA_ERROR_GENERIC_ERROR) {
         TEST_FAIL("SST system prepare should fail as version is old");
         return;
     }
@@ -276,33 +278,33 @@
 
     /* Aligns NV counters with the SST area version */
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_2);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_3);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     /* Calls sst_system_prepare to mark the SST area as a valid image */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("SST system prepare should not fail");
         return;
     }
 
     /* Removes the asset to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -318,17 +320,18 @@
  */
 static void tfm_sst_test_4003(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Creates an asset in the SST area to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
@@ -337,7 +340,7 @@
      * and make the current SST area version match NV counter 1 and 2 values.
      */
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_3);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
@@ -349,15 +352,16 @@
      * 2 values.
      */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("SST system prepare should not fail");
         return;
     }
 
     /* Gets the data from the asset */
     status = psa_ps_get(uid, offset, data_len, (read_data +
-                                                HALF_PADDING_SIZE));
-    if (status != PSA_PS_SUCCESS) {
+                                                HALF_PADDING_SIZE),
+                                                &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -370,7 +374,7 @@
 
     /* Removes the asset to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -387,17 +391,18 @@
  */
 static void tfm_sst_test_4004(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Creates an asset in the SST area to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
@@ -406,7 +411,7 @@
      * and make the current SST area version match NV counter 2 and 3 values.
      */
     status = test_sst_increment_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Increment should not fail");
         return;
     }
@@ -418,15 +423,16 @@
      * and 3 values.
      */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("SST system prepare should not fail");
         return;
     }
 
     /* Gets the data from the asset */
     status = psa_ps_get(uid, offset, data_len, (read_data +
-                                                HALF_PADDING_SIZE));
-    if (status != PSA_PS_SUCCESS) {
+                                                HALF_PADDING_SIZE),
+                                                &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -439,7 +445,7 @@
 
     /* Removes the asset to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -456,17 +462,18 @@
  */
 static void tfm_sst_test_4005(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Creates an asset in the SST area to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
@@ -475,13 +482,13 @@
      * counter 1 only.
      */
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_2);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_3);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
@@ -492,15 +499,16 @@
      * Prepare should not fail as the SST area version match the NV counter 1.
      */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("SST system prepare should not fail");
         return;
     }
 
     /* Gets the data from the asset */
     status = psa_ps_get(uid, offset, data_len, (read_data +
-                                                HALF_PADDING_SIZE));
-    if (status != PSA_PS_SUCCESS) {
+                                                HALF_PADDING_SIZE),
+                                                &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -513,7 +521,7 @@
 
     /* Removes the asset to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -527,17 +535,18 @@
  */
 static void tfm_sst_test_4006(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint32_t offset = 0;
     const uint8_t write_data[] = WRITE_DATA;
     uint8_t read_data[] = READ_DATA;
+    size_t read_data_len = 0;
 
     /* Creates an asset in the SST area to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
@@ -546,19 +555,19 @@
      * version match NV counter 1 only.
      */
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_2);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_3);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_3);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
@@ -569,15 +578,16 @@
      * Prepare should not fail as the SST area version match the NV counter 1.
      */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("SST system prepare should not fail");
         return;
     }
 
     /* Gets data from the asset */
     status = psa_ps_get(uid, offset, data_len, (read_data +
-                                                HALF_PADDING_SIZE));
-    if (status != PSA_PS_SUCCESS) {
+                                                HALF_PADDING_SIZE),
+                                                &read_data_len);
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Get should not fail");
         return;
     }
@@ -590,7 +600,7 @@
 
     /* Removes the asset to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -604,15 +614,15 @@
  */
 static void tfm_sst_test_4007(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     /* Creates an asset in the SST area to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
@@ -621,13 +631,13 @@
      * version match NV counter 2 only.
      */
     status = test_sst_increment_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Increment should not fail");
         return;
     }
 
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_3);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
@@ -639,7 +649,7 @@
      * the other counters are different.
      */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_ERROR_OPERATION_FAILED) {
+    if (status != PSA_ERROR_GENERIC_ERROR) {
         TEST_FAIL("SST system prepare should fail");
         return;
     }
@@ -656,27 +666,27 @@
 
     /* Aligns NV counters with the SST area version */
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     status = test_sst_increment_nv_counter(TFM_SST_NV_COUNTER_3);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Increment should not fail");
         return;
     }
 
     /* Calls sst_system_prepare to mark the SST area as a valid image */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("SST system prepare should not fail");
         return;
     }
 
     /* Removes the asset to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -690,15 +700,15 @@
  */
 static void tfm_sst_test_4008(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
     /* Creates an asset in the SST area to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Set should not fail with valid UID");
         return;
     }
@@ -707,19 +717,19 @@
      * version match NV counter 3 only.
      */
     status = test_sst_increment_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Increment should not fail");
         return;
     }
 
     status = test_sst_increment_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Increment should not fail");
         return;
     }
 
     status = test_sst_increment_nv_counter(TFM_SST_NV_COUNTER_2);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Increment should not fail");
         return;
     }
@@ -731,7 +741,7 @@
      * the other counters are different.
      */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_ERROR_OPERATION_FAILED) {
+    if (status != PSA_ERROR_GENERIC_ERROR) {
         TEST_FAIL("AM prepare should fail");
         return;
     }
@@ -748,33 +758,33 @@
 
     /* Align NV counters with the SST area version */
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_1);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     status = test_sst_decrement_nv_counter(TFM_SST_NV_COUNTER_2);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Decrement should not fail");
         return;
     }
 
     /* Calls sst_system_prepare to mark the SST area as a valid image */
     status = tfm_sst_test_system_prepare();
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("SST system prepare should not fail");
         return;
     }
 
     /* Removes the asset to clean up storage for the next test */
     status = psa_ps_remove(uid);
-    if (status != PSA_PS_SUCCESS) {
+    if (status != PSA_SUCCESS) {
         TEST_FAIL("Remove should not fail with valid UID");
         return;
     }
@@ -788,9 +798,9 @@
  */
 static void tfm_sst_test_4009(struct test_result_t *ret)
 {
-    psa_ps_status_t status;
-    const psa_ps_uid_t uid = TEST_UID;
-    const psa_ps_create_flags_t flags = PSA_PS_FLAG_NONE;
+    psa_status_t status;
+    const psa_storage_uid_t uid = TEST_UID;
+    const psa_storage_create_flags_t flags = PSA_STORAGE_FLAG_NONE;
     const uint32_t data_len = WRITE_DATA_SIZE;
     const uint8_t write_data[] = WRITE_DATA;
 
@@ -801,7 +811,7 @@
 
     /* Creates an asset in the SST area to generate a new SST area version */
     status = psa_ps_set(uid, data_len, write_data, flags);
-    if (status != PSA_PS_ERROR_OPERATION_FAILED) {
+    if (status != PSA_ERROR_GENERIC_ERROR) {
         TEST_FAIL("Set should fail as the non-volatile counters can not be"
                   " increased");
         return;