Create PSA-specific helper function file

Create a specific file for helper functions that are related to the
PSA API. The reason for a separate file is so that it can include
<psa/crypto.h>, without forcing this header inclusion into every test
suite. In this commit, psa_helpers.function doesn't need psa/crypto.h
yet, but this will be the case in a subsequent commit.

Move PSA_ASSERT to psa_helpers.function, since that's the sort of
things it's for.

Include "psa_helpers.function" from the PSA crypto tests.

In the ITS test, don't include "psa_helpers". The ITS tests are
meant to stand alone from the rest of the library.

tests/Makefile

@@ -104,6 +104,7 @@ $(BINARIES): %$(EXEXT): %.c $(DEP)
 	echo "  CC    $<"
 	$(CC) $(LOCAL_CFLAGS) $(CFLAGS) $<	$(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
 
+$(filter test_suite_psa_crypto%, $(BINARIES)): psa_helpers.function
 
 clean:
 ifndef WINDOWS

tests/psa_helpers.function

@@ -0,0 +1,39 @@
+/*
+ * Helper functions for tests that use the PSA API.
+ */
+/*  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_PSA_CRYPTO_SPM)
+#include "spm/psa_defs.h"
+#endif
+#include <psa/crypto.h>
+
+/** Evaluate an expression and fail the test case if it returns an error.
+ *
+ * \param expr      The expression to evaluate. This is typically a call
+ *                  to a \c psa_xxx function that returns a value of type
+ *                  #psa_status_t.
+ */
+#define PSA_ASSERT( expr ) TEST_EQUAL( ( expr ), PSA_SUCCESS )
+
+/*
+ * Local Variables:
+ * mode: c
+ * End:
+ */

tests/suites/helpers.function

@@ -126,14 +126,6 @@ typedef enum
 #define TEST_EQUAL( expr1, expr2 )              \
     TEST_ASSERT( ( expr1 ) == ( expr2 ) )
 
-/** Evaluate an expression and fail the test case if it returns an error.
- *
- * \param expr      The expression to evaluate. This is typically a call
- *                  to a \c psa_xxx function that returns a value of type
- *                  #psa_status_t.
- */
-#define PSA_ASSERT( expr ) TEST_EQUAL( ( expr ), PSA_SUCCESS )
-
 /** Allocate memory dynamically and fail the test case if this fails.
  *
  * You must set \p pointer to \c NULL before calling this macro and

tests/suites/test_suite_pk.function

@@ -10,6 +10,11 @@
 #include <limits.h>
 #include <stdint.h>
 
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+#include "mbedtls/psa_util.h"
+#include "psa_helpers.function"
+#endif
+
 static int rnd_std_rand( void *rng_state, unsigned char *output, size_t len );
 
 #define RSA_KEY_SIZE 512
@@ -67,8 +72,6 @@ size_t mbedtls_rsa_key_len_func( void *ctx )
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
 
-#include "mbedtls/psa_util.h"
-
 /*
  * Generate a key using PSA and return a handle to that key,
  * or 0 if the key generation failed.

tests/suites/test_suite_psa_crypto.function

@@ -1,15 +1,11 @@
 /* BEGIN_HEADER */
 #include <stdint.h>
 
-#if defined(MBEDTLS_PSA_CRYPTO_SPM)
-#include "spm/psa_defs.h"
-#endif
-
 #include "mbedtls/asn1.h"
 #include "mbedtls/asn1write.h"
 #include "mbedtls/oid.h"
 
-#include "psa/crypto.h"
+#include "psa_helpers.function"
 
 /** An invalid export length that will never be set by psa_export_key(). */
 static const size_t INVALID_EXPORT_LENGTH = ~0U;

tests/suites/test_suite_psa_crypto_entropy.function

@@ -1,10 +1,10 @@
 /* BEGIN_HEADER */
 #include <stdint.h>
 
-#include "psa/crypto.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/entropy_poll.h"
 
+#include "psa_helpers.function"
 #if defined(MBEDTLS_PSA_ITS_FILE_C)
 #include <stdio.h>
 #else

tests/suites/test_suite_psa_crypto_hash.function

@@ -2,11 +2,7 @@
 
 #include <stdint.h>
 
-#if defined(MBEDTLS_PSA_CRYPTO_SPM)
-#include "spm/psa_defs.h"
-#endif
-
-#include "psa/crypto.h"
+#include "psa_helpers.function"
 
 /* END_HEADER */
 

tests/suites/test_suite_psa_crypto_init.function

@@ -1,11 +1,7 @@
 /* BEGIN_HEADER */
 #include <stdint.h>
 
-#if defined(MBEDTLS_PSA_CRYPTO_SPM)
-#include "spm/psa_defs.h"
-#endif
-#include "psa/crypto.h"
-
+#include "psa_helpers.function"
 /* Some tests in this module configure entropy sources. */
 #include "psa_crypto_invasive.h"
 

tests/suites/test_suite_psa_crypto_persistent_key.function

@@ -1,7 +1,9 @@
 /* BEGIN_HEADER */
 #include <stdint.h>
-#include "psa/crypto.h"
+
+#include "psa_helpers.function"
 #include "psa_crypto_storage.h"
+
 #include "mbedtls/md.h"
 
 #define PSA_KEY_STORAGE_MAGIC_HEADER "PSA\0KEY"

tests/suites/test_suite_psa_crypto_slot_management.function

@@ -1,11 +1,7 @@
 /* BEGIN_HEADER */
 #include <stdint.h>
 
-#if defined(MBEDTLS_PSA_CRYPTO_SPM)
-#include "spm/psa_defs.h"
-#endif
-#include "psa/crypto.h"
-
+#include "psa_helpers.function"
 #include "psa_crypto_storage.h"
 
 typedef enum

tests/suites/test_suite_psa_its.function

@@ -1,6 +1,8 @@
 /* BEGIN_HEADER */
 #include "../library/psa_crypto_its.h"
 
+#define PSA_ASSERT( expr ) TEST_EQUAL( ( expr ), PSA_SUCCESS )
+
 /* Internal definitions of the implementation, copied for the sake of
  * some of the tests and of the cleanup code. */
 #define PSA_ITS_STORAGE_PREFIX ""