Dispatch hash operations through the driver wrapper layer

include/psa/crypto_builtin_hash.h

@@ -0,0 +1,101 @@
+/*
+ *  Context structure declaration of the software-based driver which performs
+ *  hashing through the PSA Crypto driver dispatch layer.
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  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.
+ */
+
+#ifndef PSA_CRYPTO_BUILTIN_HASH_H
+#define PSA_CRYPTO_BUILTIN_HASH_H
+
+#include <psa/crypto_driver_common.h>
+#include "mbedtls/md2.h"
+#include "mbedtls/md4.h"
+#include "mbedtls/md5.h"
+#include "mbedtls/ripemd160.h"
+#include "mbedtls/sha1.h"
+#include "mbedtls/sha256.h"
+#include "mbedtls/sha512.h"
+
+#if defined(MBEDTLS_PSA_BUILTIN_ALG_MD2) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_MD4) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_MD5) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_RIPEMD160) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_SHA_1) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_SHA_224) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_SHA_256) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_SHA_384) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_SHA_512)
+#define MBEDTLS_PSA_BUILTIN_HASH
+#endif
+
+#if defined(MBEDTLS_PSA_ACCEL_ALG_MD2) || \
+    defined(MBEDTLS_PSA_ACCEL_ALG_MD4) || \
+    defined(MBEDTLS_PSA_ACCEL_ALG_MD5) || \
+    defined(MBEDTLS_PSA_ACCEL_ALG_RIPEMD160) || \
+    defined(MBEDTLS_PSA_ACCEL_ALG_SHA_1) || \
+    defined(MBEDTLS_PSA_ACCEL_ALG_SHA_224) || \
+    defined(MBEDTLS_PSA_ACCEL_ALG_SHA_256) || \
+    defined(MBEDTLS_PSA_ACCEL_ALG_SHA_384) || \
+    defined(MBEDTLS_PSA_ACCEL_ALG_SHA_512)
+#define MBEDTLS_PSA_ACCEL_HASH
+#endif
+
+typedef struct
+{
+    psa_algorithm_t alg;
+    union
+    {
+        unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
+#if defined(MBEDTLS_MD2_C)
+        mbedtls_md2_context md2;
+#endif
+#if defined(MBEDTLS_MD4_C)
+        mbedtls_md4_context md4;
+#endif
+#if defined(MBEDTLS_MD5_C)
+        mbedtls_md5_context md5;
+#endif
+#if defined(MBEDTLS_RIPEMD160_C)
+        mbedtls_ripemd160_context ripemd160;
+#endif
+#if defined(MBEDTLS_SHA1_C)
+        mbedtls_sha1_context sha1;
+#endif
+#if defined(MBEDTLS_SHA256_C)
+        mbedtls_sha256_context sha256;
+#endif
+#if defined(MBEDTLS_SHA512_C)
+        mbedtls_sha512_context sha512;
+#endif
+    } ctx;
+} mbedtls_psa_hash_operation_t;
+
+#define MBEDTLS_PSA_HASH_OPERATION_INIT {0, {0}}
+
+/*
+ * BEYOND THIS POINT, TEST DRIVER DECLARATIONS ONLY.
+ */
+#if defined(PSA_CRYPTO_DRIVER_TEST)
+
+typedef mbedtls_psa_hash_operation_t mbedtls_transparent_test_driver_hash_operation_t;
+
+#define MBEDTLS_TRANSPARENT_TEST_DRIVER_HASH_OPERATION_INIT MBEDTLS_PSA_HASH_OPERATION_INIT
+
+#endif /* PSA_CRYPTO_DRIVER_TEST */
+
+#endif /* PSA_CRYPTO_BUILTIN_HASH_H */

include/psa/crypto_driver_contexts.h

@@ -0,0 +1,51 @@
+/*
+ *  Declaration of context structures for use with the PSA driver wrapper
+ *  interface.
+ *
+ *  Warning: This file will be auto-generated in the future.
+ */
+/*  Copyright The Mbed TLS Contributors
+ *  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.
+ */
+
+#ifndef PSA_CRYPTO_DRIVER_CONTEXTS_H
+#define PSA_CRYPTO_DRIVER_CONTEXTS_H
+
+#include "psa/crypto.h"
+#include "psa/crypto_driver_common.h"
+
+/* Include the context structure definitions for those drivers that were
+ * declared during the autogeneration process. */
+
+/* Include the context structure definitions for the Mbed TLS software drivers */
+#include "psa/crypto_builtin_hash.h"
+
+/* Define the context to be used for an operation that is executed through the
+ * PSA Driver wrapper layer as the union of all possible driver's contexts.
+ *
+ * The union members are the driver's context structures, and the member names
+ * are formatted as `'drivername'_ctx`. This allows for procedural generation
+ * of both this file and the content of psa_crypto_driver_wrappers.c */
+
+typedef union {
+    unsigned dummy; /* Make sure this structure is always non-empty */
+    mbedtls_psa_hash_operation_t mbedtls_ctx;
+#if defined(PSA_CRYPTO_DRIVER_TEST)
+    mbedtls_transparent_test_driver_hash_operation_t test_driver_ctx;
+#endif
+} psa_driver_hash_context_t;
+
+#endif /* PSA_CRYPTO_DRIVER_CONTEXTS_H */
+/* End of automatically generated file. */

include/psa/crypto_struct.h

@@ -68,14 +68,9 @@ extern "C" {
 #include "mbedtls/cipher.h"
 #include "mbedtls/cmac.h"
 #include "mbedtls/gcm.h"
-#include "mbedtls/md.h"
-#include "mbedtls/md2.h"
-#include "mbedtls/md4.h"
-#include "mbedtls/md5.h"
-#include "mbedtls/ripemd160.h"
-#include "mbedtls/sha1.h"
-#include "mbedtls/sha256.h"
-#include "mbedtls/sha512.h"
+
+/* Include the context definition for the compiled-in drivers */
+#include "psa/crypto_driver_contexts.h"
 
 typedef struct {
     /** Unique ID indicating which driver got assigned to do the
@@ -89,32 +84,14 @@ typedef struct {
 
 struct psa_hash_operation_s
 {
-    psa_algorithm_t alg;
-    union
-    {
-        unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
-#if defined(MBEDTLS_MD2_C)
-        mbedtls_md2_context md2;
-#endif
-#if defined(MBEDTLS_MD4_C)
-        mbedtls_md4_context md4;
-#endif
-#if defined(MBEDTLS_MD5_C)
-        mbedtls_md5_context md5;
-#endif
-#if defined(MBEDTLS_RIPEMD160_C)
-        mbedtls_ripemd160_context ripemd160;
-#endif
-#if defined(MBEDTLS_SHA1_C)
-        mbedtls_sha1_context sha1;
-#endif
-#if defined(MBEDTLS_SHA256_C)
-        mbedtls_sha256_context sha256;
-#endif
-#if defined(MBEDTLS_SHA512_C)
-        mbedtls_sha512_context sha512;
-#endif
-    } ctx;
+    /** Unique ID indicating which driver got assigned to do the
+     * operation. Since driver contexts are driver-specific, swapping
+     * drivers halfway through the operation is not supported.
+     * ID values are auto-generated in psa_driver_wrappers.h
+     * ID value zero means the context is not valid or not assigned to
+     * any driver (i.e. none of the driver contexts are active). */
+    unsigned int id;
+    psa_driver_hash_context_t ctx;
 };
 
 #define PSA_HASH_OPERATION_INIT {0, {0}}
@@ -127,6 +104,8 @@ static inline struct psa_hash_operation_s psa_hash_operation_init( void )
 #if defined(MBEDTLS_MD_C)
 typedef struct
 {
+        /** The HMAC algorithm in use */
+        psa_algorithm_t alg;
         /** The hash context. */
         struct psa_hash_operation_s hash_ctx;
         /** The HMAC part of the context. */

library/CMakeLists.txt

@@ -64,6 +64,7 @@ set(src_crypto
     psa_crypto_client.c
     psa_crypto_driver_wrappers.c
     psa_crypto_ecp.c
+    psa_crypto_hash.c
     psa_crypto_rsa.c
     psa_crypto_se.c
     psa_crypto_slot_management.c

library/Makefile

@@ -121,6 +121,7 @@ OBJS_CRYPTO= \
 	     psa_crypto_client.o \
 	     psa_crypto_driver_wrappers.o \
 	     psa_crypto_ecp.o \
+	     psa_crypto_hash.o \
 	     psa_crypto_rsa.o \
 	     psa_crypto_se.o \
 	     psa_crypto_slot_management.o \