Add a handcrafted first version of the driver wrapper code
Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 33e2cfc..91ac8bc 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -61,6 +61,7 @@
platform_util.c
poly1305.c
psa_crypto.c
+ psa_crypto_driver_wrappers.c
psa_crypto_se.c
psa_crypto_slot_management.c
psa_crypto_storage.c
diff --git a/library/Makefile b/library/Makefile
index b76a84b..c7d4a06 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -118,6 +118,7 @@
platform_util.o \
poly1305.o \
psa_crypto.o \
+ psa_crypto_driver_wrappers.o \
psa_crypto_se.o \
psa_crypto_slot_management.o \
psa_crypto_storage.o \
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index bffddc9..af8a7a9 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -27,6 +27,7 @@
#include "psa_crypto_core.h"
#include "psa_crypto_invasive.h"
+#include "psa_crypto_driver_wrappers.h"
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
#include "psa_crypto_se.h"
#endif
@@ -3659,6 +3660,17 @@
goto exit;
}
+ /* Try any of the available accelerators first */
+ status = psa_driver_wrapper_sign_hash( slot,
+ alg,
+ hash,
+ hash_length,
+ signature,
+ signature_size,
+ signature_length );
+ if( status != PSA_ERROR_NOT_SUPPORTED )
+ goto exit;
+
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
if( psa_get_se_driver( slot->attr.lifetime, &drv, &drv_context ) )
{
diff --git a/library/psa_crypto_driver_wrappers.c b/library/psa_crypto_driver_wrappers.c
new file mode 100644
index 0000000..9ace0cb
--- /dev/null
+++ b/library/psa_crypto_driver_wrappers.c
@@ -0,0 +1,103 @@
+/*
+ * Functions to delegate cryptographic operations to an available
+ * and appropriate accelerator.
+ * Warning: auto-generated file.
+ */
+/* Copyright (C) 2020, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#include "psa_crypto_core.h"
+#include "psa_crypto_driver_wrappers.h"
+
+/* Include test driver definition when running tests */
+#if defined(MBEDTLS_TEST_HOOKS)
+#undef MBEDTLS_PSA_CRYPTO_DRIVER_PRESENT
+#define MBEDTLS_PSA_CRYPTO_DRIVER_PRESENT
+#include "drivers/test_driver.h"
+#endif
+
+/* Include driver definition file for each registered driver */
+
+/* Start delegation functions */
+psa_status_t psa_driver_wrapper_sign_hash( psa_key_slot_t *slot,
+ psa_algorithm_t alg,
+ const uint8_t *hash,
+ size_t hash_length,
+ uint8_t *signature,
+ size_t signature_size,
+ size_t *signature_length )
+{
+#if defined(MBEDTLS_PSA_CRYPTO_DRIVER_PRESENT)
+ psa_status_t status = PSA_ERROR_INVALID_ARGUMENT;
+ psa_key_location_t location = PSA_KEY_LIFETIME_GET_LOCATION(slot->attr.lifetime);
+ psa_key_attributes_t attributes = {
+ .core = slot->attr
+ };
+
+ switch( location )
+ {
+ case PSA_KEY_LOCATION_LOCAL_STORAGE:
+ /* Key is stored in the slot in export representation, so
+ * cycle through all known transparent accelerators */
+#if defined(MBEDTLS_TEST_HOOKS)
+ status = test_transparent_signature_sign_hash( &attributes,
+ slot->data.key.data,
+ slot->data.key.bytes,
+ alg,
+ hash,
+ hash_length,
+ signature,
+ signature_size,
+ signature_length );
+ /* Declared with fallback == true */
+ if( status != PSA_ERROR_NOT_SUPPORTED )
+ return status;
+#endif /* MBEDTLS_TEST_HOOKS */
+ /* Fell through, meaning no accelerator supports this operation */
+ return PSA_ERROR_NOT_SUPPORTED;
+ /* Add cases for opaque driver here */
+#if defined(MBEDTLS_TEST_HOOKS)
+ case MBEDTLS_PSA_CRYPTO_TEST_DRIVER_LIFETIME:
+ return( test_opaque_signature_sign_hash( &attributes,
+ slot->data.key.data,
+ slot->data.key.bytes,
+ alg,
+ hash,
+ hash_length,
+ signature,
+ signature_size,
+ signature_length ) );
+#endif /* MBEDTLS_TEST_HOOKS */
+ default:
+ /* Key is declared with a lifetime not known to us */
+ return status;
+ }
+#else /* MBEDTLS_PSA_CRYPTO_DRIVER_PRESENT */
+ (void)slot;
+ (void)alg;
+ (void)hash;
+ (void)hash_length;
+ (void)signature;
+ (void)signature_size;
+ (void)signature_length;
+
+ return PSA_ERROR_NOT_SUPPORTED;
+#endif /* MBEDTLS_PSA_CRYPTO_DRIVER_PRESENT */
+}
+
+/* End of automatically generated file. */
diff --git a/library/psa_crypto_driver_wrappers.h b/library/psa_crypto_driver_wrappers.h
new file mode 100644
index 0000000..8fbf034
--- /dev/null
+++ b/library/psa_crypto_driver_wrappers.h
@@ -0,0 +1,40 @@
+/*
+ * Function signatures for functionality that can be provided by
+ * cryptographic accelerators.
+ * Warning: auto-generated file.
+ */
+/* Copyright (C) 2020, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#ifndef PSA_CRYPTO_DRIVER_WRAPPERS_H
+#define PSA_CRYPTO_DRIVER_WRAPPERS_H
+
+#include "psa/crypto.h"
+#include "psa/crypto_driver_common.h"
+
+psa_status_t psa_driver_wrapper_sign_hash( psa_key_slot_t *slot,
+ psa_algorithm_t alg,
+ const uint8_t *hash,
+ size_t hash_length,
+ uint8_t *signature,
+ size_t signature_size,
+ size_t *signature_length );
+
+#endif /* PSA_CRYPTO_DRIVER_WRAPPERS_H */
+
+/* End of automatically generated file. */