Add framework for simple key derivation
New key type PSA_KEY_TYPE_DERIVE. New usage flag PSA_KEY_USAGE_DERIVE.
New function psa_key_derivation.
No key derivation algorithm is implemented yet. The code may not
compile with -Wunused.
Write some unit test code for psa_key_derivation. Most of it cannot be
used yet due to the lack of a key derivation algorithm.
diff --git a/tests/suites/test_suite_psa_crypto.data b/tests/suites/test_suite_psa_crypto.data
index b44c347..1113eec 100644
--- a/tests/suites/test_suite_psa_crypto.data
+++ b/tests/suites/test_suite_psa_crypto.data
@@ -745,6 +745,10 @@
depends_on:MBEDTLS_PK_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
asymmetric_decrypt_fail:PSA_KEY_TYPE_RSA_KEYPAIR:"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":PSA_ALG_RSA_PKCS1V15_CRYPT:"0099ffde2fcc00c9cc01972ebfa7779b298dbbaf7f50707a7405296dd2783456fc792002f462e760500e02afa25a859ace8701cb5d3b0262116431c43af8eb08f5a88301057cf1c156a2a5193c143e7a5b03fac132b7e89e6dcd8f4c82c9b28452329c260d30bc39b3816b7c46b41b37b4850d2ae74e729f99c6621fbbe2e46872":PSA_ERROR_INVALID_ARGUMENT
+
+PSA key derivation: not a key derivation algorithm
+depends_on:MBEDTLS_MD_C:MBEDTLS_SHA256_C
+derive_setup:PSA_KEY_TYPE_DERIVE:"0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b":PSA_ALG_HMAC(PSA_ALG_SHA_256):"":"":42:PSA_ERROR_INVALID_ARGUMENT
PSA generate random: 0 bytes
generate_random:0
diff --git a/tests/suites/test_suite_psa_crypto.function b/tests/suites/test_suite_psa_crypto.function
index 37d6aca..278554f 100644
--- a/tests/suites/test_suite_psa_crypto.function
+++ b/tests/suites/test_suite_psa_crypto.function
@@ -357,6 +357,36 @@
return( 0 );
}
+static int exercise_key_derivation_key( psa_key_slot_t key,
+ psa_key_usage_t usage,
+ psa_algorithm_t alg )
+{
+ psa_crypto_generator_t generator = PSA_CRYPTO_GENERATOR_INIT;
+ unsigned char label[16] = "This is a label.";
+ size_t label_length = sizeof( label );
+ unsigned char seed[16] = "abcdefghijklmnop";
+ size_t seed_length = sizeof( seed );
+ unsigned char output[1];
+
+ if( usage & PSA_KEY_USAGE_DERIVE )
+ {
+ TEST_ASSERT( psa_key_derivation( &generator,
+ key, alg,
+ label, label_length,
+ seed, seed_length,
+ sizeof( output ) ) == PSA_SUCCESS );
+ TEST_ASSERT( psa_generator_read( &generator,
+ output,
+ sizeof( output ) ) == PSA_SUCCESS );
+ TEST_ASSERT( psa_generator_abort( &generator ) == PSA_SUCCESS );
+ }
+
+ return( 1 );
+
+exit:
+ return( 0 );
+}
+
static int exercise_key( psa_key_slot_t slot,
psa_key_usage_t usage,
psa_algorithm_t alg )
@@ -374,6 +404,8 @@
ok = exercise_signature_key( slot, usage, alg );
else if( PSA_ALG_IS_ASYMMETRIC_ENCRYPTION( alg ) )
ok = exercise_asymmetric_encryption_key( slot, usage, alg );
+ else if( PSA_ALG_IS_KEY_DERIVATION( alg ) )
+ ok = exercise_key_derivation_key( slot, usage, alg );
else
{
char message[40];
@@ -657,6 +689,7 @@
( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) ?
PSA_KEY_USAGE_ENCRYPT :
PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT ) :
+ PSA_ALG_IS_KEY_DERIVATION( alg ) ? PSA_KEY_USAGE_DERIVE :
0 );
psa_key_policy_t policy;
psa_key_type_t got_type;
@@ -992,6 +1025,45 @@
/* END_CASE */
/* BEGIN_CASE */
+void derive_key_policy( int policy_usage,
+ int policy_alg,
+ int key_type,
+ data_t *key_data,
+ int exercise_alg )
+{
+ int key_slot = 1;
+ psa_key_policy_t policy;
+ psa_crypto_generator_t generator = PSA_CRYPTO_GENERATOR_INIT;
+ psa_status_t status;
+
+ TEST_ASSERT( psa_crypto_init( ) == PSA_SUCCESS );
+
+ psa_key_policy_init( &policy );
+ psa_key_policy_set_usage( &policy, policy_usage, policy_alg );
+ TEST_ASSERT( psa_set_key_policy( key_slot, &policy ) == PSA_SUCCESS );
+
+ TEST_ASSERT( psa_import_key( key_slot, key_type,
+ key_data->x, key_data->len ) == PSA_SUCCESS );
+
+ status = psa_key_derivation( &generator, key_slot,
+ exercise_alg,
+ NULL, 0,
+ NULL, 0,
+ 1 );
+ if( policy_alg == exercise_alg &&
+ ( policy_usage & PSA_KEY_USAGE_DERIVE ) != 0 )
+ TEST_ASSERT( status == PSA_SUCCESS );
+ else
+ TEST_ASSERT( status == PSA_ERROR_NOT_PERMITTED );
+
+exit:
+ psa_generator_abort( &generator );
+ psa_destroy_key( key_slot );
+ mbedtls_psa_crypto_free( );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
void key_lifetime( int lifetime_arg )
{
int key_slot = 1;
@@ -2373,6 +2445,45 @@
/* END_CASE */
/* BEGIN_CASE */
+void derive_setup( int key_type_arg,
+ data_t *key_data,
+ int alg_arg,
+ data_t *salt,
+ data_t *label,
+ int requested_capacity_arg,
+ int expected_status_arg )
+{
+ psa_key_slot_t slot = 1;
+ size_t key_type = key_type_arg;
+ psa_algorithm_t alg = alg_arg;
+ size_t requested_capacity = requested_capacity_arg;
+ psa_status_t expected_status = expected_status_arg;
+ psa_crypto_generator_t generator = PSA_CRYPTO_GENERATOR_INIT;
+ psa_key_policy_t policy;
+
+ TEST_ASSERT( psa_crypto_init( ) == PSA_SUCCESS );
+
+ psa_key_policy_init( &policy );
+ psa_key_policy_set_usage( &policy, PSA_KEY_USAGE_DERIVE, alg );
+ TEST_ASSERT( psa_set_key_policy( slot, &policy ) == PSA_SUCCESS );
+
+ TEST_ASSERT( psa_import_key( slot, key_type,
+ key_data->x,
+ key_data->len ) == PSA_SUCCESS );
+
+ TEST_ASSERT( psa_key_derivation( &generator, slot, alg,
+ salt->x, salt->len,
+ label->x, label->len,
+ requested_capacity ) == expected_status );
+
+exit:
+ psa_generator_abort( &generator );
+ psa_destroy_key( slot );
+ mbedtls_psa_crypto_free( );
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
void generate_random( int bytes_arg )
{
size_t bytes = bytes_arg;