Implement the secure element driver registration function

library/CMakeLists.txt

@@ -53,6 +53,7 @@ set(src_crypto
     platform_util.c
     poly1305.c
     psa_crypto.c
+    psa_crypto_se.c
     psa_crypto_slot_management.c
     psa_crypto_storage.c
     psa_its_file.c

library/Makefile

@@ -80,7 +80,7 @@ OBJS_CRYPTO=	aes.o		aesni.o		arc4.o		\
 		pk.o		pk_wrap.o	pkcs12.o	\
 		pkcs5.o		pkparse.o	pkwrite.o	\
 		platform.o	platform_util.o	poly1305.o	\
-		psa_crypto.o					\
+		psa_crypto.o	psa_crypto_se.o			\
 		psa_crypto_slot_management.o			\
 		psa_crypto_storage.o				\
 		psa_its_file.o					\

library/psa_crypto_se.c

@@ -0,0 +1,72 @@
+/*
+ *  PSA crypto support for secure element drivers
+ */
+/*  Copyright (C) 2019, 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)
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_PSA_CRYPTO_C)
+
+#include "psa_crypto_se.h"
+
+typedef struct
+{
+    psa_key_lifetime_t lifetime;
+    const psa_drv_se_t *methods;
+} method_table_entry_t;
+
+static method_table_entry_t driver_table[PSA_MAX_SE_DRIVERS];
+
+psa_status_t psa_register_se_driver(
+    psa_key_lifetime_t lifetime,
+    const psa_drv_se_t *methods)
+{
+    size_t i;
+
+    if( methods->hal_version != PSA_DRV_SE_HAL_VERSION )
+        return( PSA_ERROR_NOT_SUPPORTED );
+    if( lifetime == PSA_KEY_LIFETIME_VOLATILE ||
+        lifetime == PSA_KEY_LIFETIME_PERSISTENT )
+    {
+        return( PSA_ERROR_INVALID_ARGUMENT );
+    }
+
+    for( i = 0; i < PSA_MAX_SE_DRIVERS; i++ )
+    {
+        if( driver_table[i].lifetime == 0 )
+            break;
+        /* Check that lifetime isn't already in use up to the first free
+         * entry. Since entries are created in order and never deleted,
+         * there can't be a used entry after the first free entry. */
+        if( driver_table[i].lifetime == lifetime )
+            return( PSA_ERROR_ALREADY_EXISTS );
+    }
+    if( i == PSA_MAX_SE_DRIVERS )
+        return( PSA_ERROR_INSUFFICIENT_MEMORY );
+
+    driver_table[i].lifetime = lifetime;
+    driver_table[i].methods = methods;
+    return( PSA_SUCCESS );
+}
+
+#endif /* MBEDTLS_PSA_CRYPTO_C */

library/psa_crypto_se.h

@@ -0,0 +1,37 @@
+/*
+ *  PSA crypto support for secure element drivers
+ */
+/*  Copyright (C) 2019, 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_SE_H
+#define PSA_CRYPTO_SE_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include "psa/crypto.h"
+#include "psa/crypto_se_driver.h"
+
+/** The maximum number of registered secure element driver lifetimes. */
+#define PSA_MAX_SE_DRIVERS 4
+
+#endif /* PSA_CRYPTO_SE_H */

visualc/VS2010/mbedTLS.vcxproj

@@ -225,6 +225,7 @@
     <ClInclude Include="..\..\library/psa_crypto_core.h" />
     <ClInclude Include="..\..\library/psa_crypto_invasive.h" />
     <ClInclude Include="..\..\library/psa_crypto_its.h" />
+    <ClInclude Include="..\..\library/psa_crypto_se.h" />
     <ClInclude Include="..\..\library/psa_crypto_service_integration.h" />
     <ClInclude Include="..\..\library/psa_crypto_slot_management.h" />
     <ClInclude Include="..\..\library/psa_crypto_storage.h" />
@@ -281,6 +282,7 @@
     <ClCompile Include="..\..\library\platform_util.c" />
     <ClCompile Include="..\..\library\poly1305.c" />
     <ClCompile Include="..\..\library\psa_crypto.c" />
+    <ClCompile Include="..\..\library\psa_crypto_se.c" />
     <ClCompile Include="..\..\library\psa_crypto_slot_management.c" />
     <ClCompile Include="..\..\library\psa_crypto_storage.c" />
     <ClCompile Include="..\..\library\psa_its_file.c" />