diff --git a/include/mbedtls/ccm.h b/include/mbedtls/ccm.h
index 6c22552..a1f601f 100644
--- a/include/mbedtls/ccm.h
+++ b/include/mbedtls/ccm.h
@@ -77,7 +77,8 @@
 typedef struct mbedtls_ccm_context {
     unsigned char MBEDTLS_PRIVATE(y)[16];    /*!< The Y working buffer */
     unsigned char MBEDTLS_PRIVATE(ctr)[16];  /*!< The counter buffer */
-    mbedtls_cipher_context_t MBEDTLS_PRIVATE(cipher_ctx);    /*!< The cipher context used. */
+    int MBEDTLS_PRIVATE(state);              /*!< Working value holding context's
+                                                  state. Used for chunked data input */
     size_t MBEDTLS_PRIVATE(plaintext_len);   /*!< Total plaintext length */
     size_t MBEDTLS_PRIVATE(add_len);         /*!< Total authentication data length */
     size_t MBEDTLS_PRIVATE(tag_len);         /*!< Total tag length */
@@ -87,15 +88,13 @@
                                                   and plaintext/ciphertext.
                                                   This variable is set to zero after
                                                   auth data input is finished. */
-    unsigned char MBEDTLS_PRIVATE(q);        /*!< The Q working value */
-    unsigned char MBEDTLS_PRIVATE(mode);     /*!< The operation to perform:
+    unsigned int MBEDTLS_PRIVATE(q);         /*!< The Q working value */
+    unsigned int MBEDTLS_PRIVATE(mode);      /*!< The operation to perform:
                                               #MBEDTLS_CCM_ENCRYPT or
                                               #MBEDTLS_CCM_DECRYPT or
                                               #MBEDTLS_CCM_STAR_ENCRYPT or
                                               #MBEDTLS_CCM_STAR_DECRYPT. */
-    int MBEDTLS_PRIVATE(state);              /*!< Working value holding context's
-                                                  state. Used for chunked data
-                                                  input */
+    mbedtls_cipher_context_t MBEDTLS_PRIVATE(cipher_ctx);    /*!< The cipher context used. */
 }
 mbedtls_ccm_context;
 
diff --git a/include/mbedtls/entropy.h b/include/mbedtls/entropy.h
index e17245e..c2bba41 100644
--- a/include/mbedtls/entropy.h
+++ b/include/mbedtls/entropy.h
@@ -115,10 +115,10 @@
  * \brief           Entropy context structure
  */
 typedef struct mbedtls_entropy_context {
+    mbedtls_md_context_t  MBEDTLS_PRIVATE(accumulator);
     int MBEDTLS_PRIVATE(accumulator_started); /* 0 after init.
                                                * 1 after the first update.
                                                * -1 after free. */
-    mbedtls_md_context_t  MBEDTLS_PRIVATE(accumulator);
     int             MBEDTLS_PRIVATE(source_count); /* Number of entries used in source. */
     mbedtls_entropy_source_state    MBEDTLS_PRIVATE(source)[MBEDTLS_ENTROPY_MAX_SOURCES];
 #if defined(MBEDTLS_THREADING_C)
diff --git a/include/mbedtls/sha256.h b/include/mbedtls/sha256.h
index 87e5cc6..87e259f 100644
--- a/include/mbedtls/sha256.h
+++ b/include/mbedtls/sha256.h
@@ -50,9 +50,9 @@
  *                 made in the call to mbedtls_sha256_starts().
  */
 typedef struct mbedtls_sha256_context {
+    unsigned char MBEDTLS_PRIVATE(buffer)[64];   /*!< The data block being processed. */
     uint32_t MBEDTLS_PRIVATE(total)[2];          /*!< The number of Bytes processed.  */
     uint32_t MBEDTLS_PRIVATE(state)[8];          /*!< The intermediate digest state.  */
-    unsigned char MBEDTLS_PRIVATE(buffer)[64];   /*!< The data block being processed. */
     int MBEDTLS_PRIVATE(is224);                  /*!< Determines which function to use:
                                                     0: Use SHA-256, or 1: Use SHA-224. */
 }
diff --git a/library/ccm.c b/library/ccm.c
index cd689c8..bc61376 100644
--- a/library/ccm.c
+++ b/library/ccm.c
@@ -400,7 +400,6 @@
             mbedtls_xor(ctx->y + offset, ctx->y + offset, local_output, use_len);
 
             memcpy(output, local_output, use_len);
-            mbedtls_platform_zeroize(local_output, 16);
 
             if (use_len + offset == 16 || ctx->processed == ctx->plaintext_len) {
                 if ((ret =
diff --git a/library/ecp.c b/library/ecp.c
index f9b6672..5f2a7b0 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -958,9 +958,8 @@
     /*
      * Next two bytes are the namedcurve value
      */
-    tls_id = *(*buf)++;
-    tls_id <<= 8;
-    tls_id |= *(*buf)++;
+    tls_id = MBEDTLS_GET_UINT16_BE(*buf, 0);
+    *buf += 2;
 
     if ((curve_info = mbedtls_ecp_curve_info_from_tls_id(tls_id)) == NULL) {
         return MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE;
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 84da7ad..456d4e3 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -64,6 +64,7 @@
 #include "mbedtls/cipher.h"
 #include "mbedtls/ccm.h"
 #include "mbedtls/cmac.h"
+#include "mbedtls/constant_time.h"
 #include "mbedtls/des.h"
 #include "mbedtls/ecdh.h"
 #include "mbedtls/ecp.h"
@@ -104,9 +105,9 @@
 #define RNG_SEEDED 2
 
 typedef struct {
-    unsigned initialized : 1;
-    unsigned rng_state : 2;
-    unsigned drivers_initialized : 1;
+    uint8_t initialized;
+    uint8_t rng_state;
+    uint8_t drivers_initialized;
     mbedtls_psa_random_context_t rng;
 } psa_global_data_t;
 
@@ -152,9 +153,15 @@
         case 0:
             return PSA_SUCCESS;
 
+#if defined(MBEDTLS_AES_C)
         case MBEDTLS_ERR_AES_INVALID_KEY_LENGTH:
         case MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH:
             return PSA_ERROR_NOT_SUPPORTED;
+        case MBEDTLS_ERR_AES_BAD_INPUT_DATA:
+            return PSA_ERROR_INVALID_ARGUMENT;
+#endif
+
+#if defined(MBEDTLS_ASN1_PARSE_C) || defined(MBEDTLS_ASN1_WRITE_C)
         case MBEDTLS_ERR_ASN1_OUT_OF_DATA:
         case MBEDTLS_ERR_ASN1_UNEXPECTED_TAG:
         case MBEDTLS_ERR_ASN1_INVALID_LENGTH:
@@ -165,26 +172,34 @@
             return PSA_ERROR_INSUFFICIENT_MEMORY;
         case MBEDTLS_ERR_ASN1_BUF_TOO_SMALL:
             return PSA_ERROR_BUFFER_TOO_SMALL;
-
-#if defined(MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA)
-        case MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA:
 #endif
+
+#if defined(MBEDTLS_CAMELLIA_C)
+        case MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA:
         case MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH:
             return PSA_ERROR_NOT_SUPPORTED;
+#endif
 
+#if defined(MBEDTLS_CCM_C)
         case MBEDTLS_ERR_CCM_BAD_INPUT:
             return PSA_ERROR_INVALID_ARGUMENT;
         case MBEDTLS_ERR_CCM_AUTH_FAILED:
             return PSA_ERROR_INVALID_SIGNATURE;
+#endif
 
+#if defined(MBEDTLS_CHACHA20_C)
         case MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA:
             return PSA_ERROR_INVALID_ARGUMENT;
+#endif
 
+#if defined(MBEDTLS_CHACHAPOLY_C)
         case MBEDTLS_ERR_CHACHAPOLY_BAD_STATE:
             return PSA_ERROR_BAD_STATE;
         case MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED:
             return PSA_ERROR_INVALID_SIGNATURE;
+#endif
 
+#if defined(MBEDTLS_CIPHER_C)
         case MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE:
             return PSA_ERROR_NOT_SUPPORTED;
         case MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA:
@@ -199,6 +214,7 @@
             return PSA_ERROR_INVALID_SIGNATURE;
         case MBEDTLS_ERR_CIPHER_INVALID_CONTEXT:
             return PSA_ERROR_CORRUPTION_DETECTED;
+#endif
 
 #if !(defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG) ||      \
             defined(MBEDTLS_PSA_HMAC_DRBG_MD_TYPE))
@@ -213,20 +229,24 @@
             return PSA_ERROR_INSUFFICIENT_ENTROPY;
 #endif
 
+#if defined(MBEDTLS_DES_C)
         case MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH:
             return PSA_ERROR_NOT_SUPPORTED;
+#endif
 
         case MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED:
         case MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE:
         case MBEDTLS_ERR_ENTROPY_SOURCE_FAILED:
             return PSA_ERROR_INSUFFICIENT_ENTROPY;
 
+#if defined(MBEDTLS_GCM_C)
         case MBEDTLS_ERR_GCM_AUTH_FAILED:
             return PSA_ERROR_INVALID_SIGNATURE;
         case MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL:
             return PSA_ERROR_BUFFER_TOO_SMALL;
         case MBEDTLS_ERR_GCM_BAD_INPUT:
             return PSA_ERROR_INVALID_ARGUMENT;
+#endif
 
 #if !defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG) &&        \
             defined(MBEDTLS_PSA_HMAC_DRBG_MD_TYPE)
@@ -241,17 +261,24 @@
             return PSA_ERROR_INSUFFICIENT_ENTROPY;
 #endif
 
+#if defined(MBEDTLS_MD_LIGHT)
         case MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE:
             return PSA_ERROR_NOT_SUPPORTED;
         case MBEDTLS_ERR_MD_BAD_INPUT_DATA:
             return PSA_ERROR_INVALID_ARGUMENT;
         case MBEDTLS_ERR_MD_ALLOC_FAILED:
             return PSA_ERROR_INSUFFICIENT_MEMORY;
+#if defined(MBEDTLS_FS_IO)
         case MBEDTLS_ERR_MD_FILE_IO_ERROR:
             return PSA_ERROR_STORAGE_FAILURE;
+#endif
+#endif
 
+#if defined(MBEDTLS_BIGNUM_C)
+#if defined(MBEDTLS_FS_IO)
         case MBEDTLS_ERR_MPI_FILE_IO_ERROR:
             return PSA_ERROR_STORAGE_FAILURE;
+#endif
         case MBEDTLS_ERR_MPI_BAD_INPUT_DATA:
             return PSA_ERROR_INVALID_ARGUMENT;
         case MBEDTLS_ERR_MPI_INVALID_CHARACTER:
@@ -266,14 +293,19 @@
             return PSA_ERROR_INVALID_ARGUMENT;
         case MBEDTLS_ERR_MPI_ALLOC_FAILED:
             return PSA_ERROR_INSUFFICIENT_MEMORY;
+#endif
 
+#if defined(MBEDTLS_PK_C)
         case MBEDTLS_ERR_PK_ALLOC_FAILED:
             return PSA_ERROR_INSUFFICIENT_MEMORY;
         case MBEDTLS_ERR_PK_TYPE_MISMATCH:
         case MBEDTLS_ERR_PK_BAD_INPUT_DATA:
             return PSA_ERROR_INVALID_ARGUMENT;
+#if defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) || defined(MBEDTLS_FS_IO) || \
+            defined(MBEDTLS_PSA_ITS_FILE_C)
         case MBEDTLS_ERR_PK_FILE_IO_ERROR:
             return PSA_ERROR_STORAGE_FAILURE;
+#endif
         case MBEDTLS_ERR_PK_KEY_INVALID_VERSION:
         case MBEDTLS_ERR_PK_KEY_INVALID_FORMAT:
             return PSA_ERROR_INVALID_ARGUMENT;
@@ -292,12 +324,14 @@
             return PSA_ERROR_INVALID_SIGNATURE;
         case MBEDTLS_ERR_PK_BUFFER_TOO_SMALL:
             return PSA_ERROR_BUFFER_TOO_SMALL;
+#endif
 
         case MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED:
             return PSA_ERROR_HARDWARE_FAILURE;
         case MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED:
             return PSA_ERROR_NOT_SUPPORTED;
 
+#if defined(MBEDTLS_RSA_C)
         case MBEDTLS_ERR_RSA_BAD_INPUT_DATA:
             return PSA_ERROR_INVALID_ARGUMENT;
         case MBEDTLS_ERR_RSA_INVALID_PADDING:
@@ -315,7 +349,9 @@
             return PSA_ERROR_BUFFER_TOO_SMALL;
         case MBEDTLS_ERR_RSA_RNG_FAILED:
             return PSA_ERROR_INSUFFICIENT_ENTROPY;
+#endif
 
+#if defined(MBEDTLS_ECP_LIGHT)
         case MBEDTLS_ERR_ECP_BAD_INPUT_DATA:
         case MBEDTLS_ERR_ECP_INVALID_KEY:
             return PSA_ERROR_INVALID_ARGUMENT;
@@ -331,8 +367,11 @@
         case MBEDTLS_ERR_ECP_RANDOM_FAILED:
             return PSA_ERROR_INSUFFICIENT_ENTROPY;
 
+#if defined(MBEDTLS_ECP_RESTARTABLE)
         case MBEDTLS_ERR_ECP_IN_PROGRESS:
             return PSA_OPERATION_INCOMPLETE;
+#endif
+#endif
 
         case MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED:
             return PSA_ERROR_CORRUPTION_DETECTED;
@@ -392,45 +431,71 @@
                                           size_t *bits)
 {
     switch (grpid) {
+#if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
         case MBEDTLS_ECP_DP_SECP192R1:
             *bits = 192;
             return PSA_ECC_FAMILY_SECP_R1;
+#endif
+#if defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
         case MBEDTLS_ECP_DP_SECP224R1:
             *bits = 224;
             return PSA_ECC_FAMILY_SECP_R1;
+#endif
+#if defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
         case MBEDTLS_ECP_DP_SECP256R1:
             *bits = 256;
             return PSA_ECC_FAMILY_SECP_R1;
+#endif
+#if defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
         case MBEDTLS_ECP_DP_SECP384R1:
             *bits = 384;
             return PSA_ECC_FAMILY_SECP_R1;
+#endif
+#if defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
         case MBEDTLS_ECP_DP_SECP521R1:
             *bits = 521;
             return PSA_ECC_FAMILY_SECP_R1;
+#endif
+#if defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)
         case MBEDTLS_ECP_DP_BP256R1:
             *bits = 256;
             return PSA_ECC_FAMILY_BRAINPOOL_P_R1;
+#endif
+#if defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)
         case MBEDTLS_ECP_DP_BP384R1:
             *bits = 384;
             return PSA_ECC_FAMILY_BRAINPOOL_P_R1;
+#endif
+#if defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)
         case MBEDTLS_ECP_DP_BP512R1:
             *bits = 512;
             return PSA_ECC_FAMILY_BRAINPOOL_P_R1;
+#endif
+#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
         case MBEDTLS_ECP_DP_CURVE25519:
             *bits = 255;
             return PSA_ECC_FAMILY_MONTGOMERY;
+#endif
+#if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
         case MBEDTLS_ECP_DP_SECP192K1:
             *bits = 192;
             return PSA_ECC_FAMILY_SECP_K1;
+#endif
+#if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
         case MBEDTLS_ECP_DP_SECP224K1:
             *bits = 224;
             return PSA_ECC_FAMILY_SECP_K1;
+#endif
+#if defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
         case MBEDTLS_ECP_DP_SECP256K1:
             *bits = 256;
             return PSA_ECC_FAMILY_SECP_K1;
+#endif
+#if defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
         case MBEDTLS_ECP_DP_CURVE448:
             *bits = 448;
             return PSA_ECC_FAMILY_MONTGOMERY;
+#endif
         default:
             *bits = 0;
             return 0;
@@ -2356,7 +2421,7 @@
         goto exit;
     }
 
-    if (mbedtls_psa_safer_memcmp(hash, actual_hash, actual_hash_length) != 0) {
+    if (mbedtls_ct_memcmp(hash, actual_hash, actual_hash_length) != 0) {
         status = PSA_ERROR_INVALID_SIGNATURE;
     }
 
@@ -2405,7 +2470,7 @@
         status = PSA_ERROR_INVALID_SIGNATURE;
         goto exit;
     }
-    if (mbedtls_psa_safer_memcmp(hash, actual_hash, actual_hash_length) != 0) {
+    if (mbedtls_ct_memcmp(hash, actual_hash, actual_hash_length) != 0) {
         status = PSA_ERROR_INVALID_SIGNATURE;
     }
 
@@ -2787,7 +2852,7 @@
         status = PSA_ERROR_INVALID_SIGNATURE;
         goto exit;
     }
-    if (mbedtls_psa_safer_memcmp(mac, actual_mac, actual_mac_length) != 0) {
+    if (mbedtls_ct_memcmp(mac, actual_mac, actual_mac_length) != 0) {
         status = PSA_ERROR_INVALID_SIGNATURE;
         goto exit;
     }
diff --git a/library/psa_crypto_core.h b/library/psa_crypto_core.h
index 8bc1b64..2b4afd7 100644
--- a/library/psa_crypto_core.h
+++ b/library/psa_crypto_core.h
@@ -38,27 +38,6 @@
  */
 int psa_can_do_hash(psa_algorithm_t hash_alg);
 
-/** Constant-time buffer comparison
- *
- * \param[in]  a    Left-hand buffer for comparison.
- * \param[in]  b    Right-hand buffer for comparison.
- * \param n         Amount of bytes to compare.
- *
- * \return 0 if the buffer contents are equal, non-zero otherwise
- */
-static inline int mbedtls_psa_safer_memcmp(
-    const uint8_t *a, const uint8_t *b, size_t n)
-{
-    size_t i;
-    unsigned char diff = 0;
-
-    for (i = 0; i < n; i++) {
-        diff |= a[i] ^ b[i];
-    }
-
-    return diff;
-}
-
 /** The data structure representing a key slot, containing key material
  * and metadata for one key.
  */
diff --git a/library/psa_crypto_mac.c b/library/psa_crypto_mac.c
index 07f123e..2f2c51d 100644
--- a/library/psa_crypto_mac.c
+++ b/library/psa_crypto_mac.c
@@ -29,6 +29,7 @@
 #include <mbedtls/md.h>
 
 #include <mbedtls/error.h>
+#include "mbedtls/constant_time.h"
 #include <string.h>
 
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_HMAC)
@@ -453,7 +454,7 @@
         goto cleanup;
     }
 
-    if (mbedtls_psa_safer_memcmp(mac, actual_mac, mac_length) != 0) {
+    if (mbedtls_ct_memcmp(mac, actual_mac, mac_length) != 0) {
         status = PSA_ERROR_INVALID_SIGNATURE;
     }
 
diff --git a/library/psa_crypto_slot_management.c b/library/psa_crypto_slot_management.c
index a10cb2b..ef285ac 100644
--- a/library/psa_crypto_slot_management.c
+++ b/library/psa_crypto_slot_management.c
@@ -38,7 +38,7 @@
 
 typedef struct {
     psa_key_slot_t key_slots[MBEDTLS_PSA_KEY_SLOT_COUNT];
-    unsigned key_slots_initialized : 1;
+    uint8_t key_slots_initialized;
 } psa_global_data_t;
 
 static psa_global_data_t global_data;
diff --git a/scripts/data_files/driver_templates/psa_crypto_driver_wrappers.c.jinja b/scripts/data_files/driver_templates/psa_crypto_driver_wrappers.c.jinja
index 3ecd74d..1b52066 100644
--- a/scripts/data_files/driver_templates/psa_crypto_driver_wrappers.c.jinja
+++ b/scripts/data_files/driver_templates/psa_crypto_driver_wrappers.c.jinja
@@ -32,6 +32,7 @@
 #include "psa_crypto_rsa.h"
 
 #include "mbedtls/platform.h"
+#include "mbedtls/constant_time.h"
 /* END-common headers */
 
 #if defined(MBEDTLS_PSA_CRYPTO_C)
@@ -2253,7 +2254,7 @@
                 if( status == PSA_SUCCESS )
                 {
                     if( tag_length != check_tag_length ||
-                        mbedtls_psa_safer_memcmp( tag, check_tag, tag_length )
+                        mbedtls_ct_memcmp( tag, check_tag, tag_length )
                         != 0 )
                         status = PSA_ERROR_INVALID_SIGNATURE;
                 }
diff --git a/tests/src/drivers/test_driver_aead.c b/tests/src/drivers/test_driver_aead.c
index 8eb5547..6dadf52 100644
--- a/tests/src/drivers/test_driver_aead.c
+++ b/tests/src/drivers/test_driver_aead.c
@@ -25,6 +25,8 @@
 
 #include "test/drivers/aead.h"
 
+#include "mbedtls/constant_time.h"
+
 #if defined(MBEDTLS_TEST_LIBTESTDRIVER1)
 #include "libtestdriver1/library/psa_crypto_aead.h"
 #endif
@@ -431,7 +433,7 @@
 
         if (mbedtls_test_driver_aead_hooks.driver_status == PSA_SUCCESS) {
             if (tag_length != check_tag_length ||
-                mbedtls_psa_safer_memcmp(tag, check_tag, tag_length)
+                mbedtls_ct_memcmp(tag, check_tag, tag_length)
                 != 0) {
                 mbedtls_test_driver_aead_hooks.driver_status =
                     PSA_ERROR_INVALID_SIGNATURE;