psa: Test fresh contexts have default behavior

Test that freshly-initialized contexts exhibit default behavior through
the API. Do this without depending on the internal representation of the
contexts. This provides better portability of our tests on compilers
like MSVC.

Author: Patater

tests/suites/test_suite_psa_crypto.function

@@ -1441,15 +1441,15 @@ void key_policy_init( )
 
     memset( &zero, 0, sizeof( zero ) );
 
-    /* Although not technically guaranteed by the C standard nor the PSA Crypto
-     * specification, we test that all valid ways of initializing the object
-     * have the same bit pattern. This is a stronger requirement that may not
-     * be valid on all platforms or PSA Crypto implementations, but implies the
-     * weaker actual requirement is met: that a freshly initialized object, no
-     * matter how it was initialized, acts the same as any other valid
-     * initialization. */
-    TEST_EQUAL( memcmp( &func, &zero, sizeof( zero ) ), 0 );
-    TEST_EQUAL( memcmp( &init, &zero, sizeof( zero ) ), 0 );
+    /* A default key policy should not permit any usage. */
+    TEST_EQUAL( psa_key_policy_get_usage( &func ), 0 );
+    TEST_EQUAL( psa_key_policy_get_usage( &init ), 0 );
+    TEST_EQUAL( psa_key_policy_get_usage( &zero ), 0 );
+
+    /* A default key policy should not permit any algorithm. */
+    TEST_EQUAL( psa_key_policy_get_algorithm( &func ), 0 );
+    TEST_EQUAL( psa_key_policy_get_algorithm( &init ), 0 );
+    TEST_EQUAL( psa_key_policy_get_algorithm( &zero ), 0 );
 }
 /* END_CASE */
 
@@ -1960,15 +1960,10 @@ void hash_operation_init( )
 
     memset( &zero, 0, sizeof( zero ) );
 
-    /* Although not technically guaranteed by the C standard nor the PSA Crypto
-     * specification, we test that all valid ways of initializing the object
-     * have the same bit pattern. This is a stronger requirement that may not
-     * be valid on all platforms or PSA Crypto implementations, but implies the
-     * weaker actual requirement is met: that a freshly initialized object, no
-     * matter how it was initialized, acts the same as any other valid
-     * initialization. */
-    TEST_EQUAL( memcmp( &func, &zero, sizeof( zero ) ), 0 );
-    TEST_EQUAL( memcmp( &init, &zero, sizeof( zero ) ), 0 );
+    /* A default hash operation should be abortable without error. */
+    PSA_ASSERT( psa_hash_abort( &func ) );
+    PSA_ASSERT( psa_hash_abort( &init ) );
+    PSA_ASSERT( psa_hash_abort( &zero ) );
 }
 /* END_CASE */
 
@@ -2183,15 +2178,10 @@ void mac_operation_init( )
 
     memset( &zero, 0, sizeof( zero ) );
 
-    /* Although not technically guaranteed by the C standard nor the PSA Crypto
-     * specification, we test that all valid ways of initializing the object
-     * have the same bit pattern. This is a stronger requirement that may not
-     * be valid on all platforms or PSA Crypto implementations, but implies the
-     * weaker actual requirement is met: that a freshly initialized object, no
-     * matter how it was initialized, acts the same as any other valid
-     * initialization. */
-    TEST_EQUAL( memcmp( &func, &zero, sizeof( zero ) ), 0 );
-    TEST_EQUAL( memcmp( &init, &zero, sizeof( zero ) ), 0 );
+    /* A default MAC operation should be abortable without error. */
+    PSA_ASSERT( psa_mac_abort( &func ) );
+    PSA_ASSERT( psa_mac_abort( &init ) );
+    PSA_ASSERT( psa_mac_abort( &zero ) );
 }
 /* END_CASE */
 
@@ -2338,15 +2328,10 @@ void cipher_operation_init( )
 
     memset( &zero, 0, sizeof( zero ) );
 
-    /* Although not technically guaranteed by the C standard nor the PSA Crypto
-     * specification, we test that all valid ways of initializing the object
-     * have the same bit pattern. This is a stronger requirement that may not
-     * be valid on all platforms or PSA Crypto implementations, but implies the
-     * weaker actual requirement is met: that a freshly initialized object, no
-     * matter how it was initialized, acts the same as any other valid
-     * initialization. */
-    TEST_EQUAL( memcmp( &func, &zero, sizeof( zero ) ), 0 );
-    TEST_EQUAL( memcmp( &init, &zero, sizeof( zero ) ), 0 );
+    /* A default cipher operation should be abortable without error. */
+    PSA_ASSERT( psa_cipher_abort( &func ) );
+    PSA_ASSERT( psa_cipher_abort( &init ) );
+    PSA_ASSERT( psa_cipher_abort( &zero ) );
 }
 /* END_CASE */
 
@@ -3527,21 +3512,25 @@ void crypto_generator_init( )
      * Clang 5 complains when `-Wmissing-field-initializers` is used, even
      * though it's OK by the C standard. We could test for this, but we'd need
      * to supress the Clang warning for the test. */
+    size_t capacity;
     psa_crypto_generator_t func = psa_crypto_generator_init( );
     psa_crypto_generator_t init = PSA_CRYPTO_GENERATOR_INIT;
     psa_crypto_generator_t zero;
 
     memset( &zero, 0, sizeof( zero ) );
 
-    /* Although not technically guaranteed by the C standard nor the PSA Crypto
-     * specification, we test that all valid ways of initializing the object
-     * have the same bit pattern. This is a stronger requirement that may not
-     * be valid on all platforms or PSA Crypto implementations, but implies the
-     * weaker actual requirement is met: that a freshly initialized object, no
-     * matter how it was initialized, acts the same as any other valid
-     * initialization. */
-    TEST_EQUAL( memcmp( &func, &zero, sizeof( zero ) ), 0 );
-    TEST_EQUAL( memcmp( &init, &zero, sizeof( zero ) ), 0 );
+    /* A default generator should have no capacity. */
+    PSA_ASSERT( psa_get_generator_capacity( &func, &capacity ) );
+    TEST_EQUAL( capacity, 0 );
+    PSA_ASSERT( psa_get_generator_capacity( &init, &capacity ) );
+    TEST_EQUAL( capacity, 0 );
+    PSA_ASSERT( psa_get_generator_capacity( &zero, &capacity ) );
+    TEST_EQUAL( capacity, 0 );
+
+    /* A default generator should be abortable without error. */
+    PSA_ASSERT( psa_generator_abort(&func) );
+    PSA_ASSERT( psa_generator_abort(&init) );
+    PSA_ASSERT( psa_generator_abort(&zero) );
 }
 /* END_CASE */