| /** Code to exercise a PSA key object, i.e. validate that it seems well-formed |
| * and can do what it is supposed to do. |
| */ |
| |
| /* |
| * 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. |
| */ |
| |
| #include <test/helpers.h> |
| #include <test/macros.h> |
| #include <test/psa_exercise_key.h> |
| |
| #if defined(MBEDTLS_PSA_CRYPTO_C) |
| |
| #include <mbedtls/asn1.h> |
| #include <psa/crypto.h> |
| |
| #include <test/asn1_helpers.h> |
| #include <test/psa_crypto_helpers.h> |
| |
| #if defined(MBEDTLS_PSA_CRYPTO_SE_C) |
| static int lifetime_is_dynamic_secure_element( psa_key_lifetime_t lifetime ) |
| { |
| return( PSA_KEY_LIFETIME_GET_LOCATION( lifetime ) != |
| PSA_KEY_LOCATION_LOCAL_STORAGE ); |
| } |
| #endif |
| |
| static int check_key_attributes_sanity( mbedtls_svc_key_id_t key ) |
| { |
| int ok = 0; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| psa_key_lifetime_t lifetime; |
| mbedtls_svc_key_id_t id; |
| psa_key_type_t type; |
| size_t bits; |
| |
| PSA_ASSERT( psa_get_key_attributes( key, &attributes ) ); |
| lifetime = psa_get_key_lifetime( &attributes ); |
| id = psa_get_key_id( &attributes ); |
| type = psa_get_key_type( &attributes ); |
| bits = psa_get_key_bits( &attributes ); |
| |
| /* Persistence */ |
| if( PSA_KEY_LIFETIME_IS_VOLATILE( lifetime ) ) |
| { |
| TEST_ASSERT( |
| ( PSA_KEY_ID_VOLATILE_MIN <= |
| MBEDTLS_SVC_KEY_ID_GET_KEY_ID( id ) ) && |
| ( MBEDTLS_SVC_KEY_ID_GET_KEY_ID( id ) <= |
| PSA_KEY_ID_VOLATILE_MAX ) ); |
| } |
| else |
| { |
| TEST_ASSERT( |
| ( PSA_KEY_ID_USER_MIN <= MBEDTLS_SVC_KEY_ID_GET_KEY_ID( id ) ) && |
| ( MBEDTLS_SVC_KEY_ID_GET_KEY_ID( id ) <= PSA_KEY_ID_USER_MAX ) ); |
| } |
| #if defined(MBEDTLS_PSA_CRYPTO_SE_C) |
| /* randomly-generated 64-bit constant, should never appear in test data */ |
| psa_key_slot_number_t slot_number = 0xec94d4a5058a1a21; |
| psa_status_t status = psa_get_key_slot_number( &attributes, &slot_number ); |
| if( lifetime_is_dynamic_secure_element( lifetime ) ) |
| { |
| /* Mbed Crypto currently always exposes the slot number to |
| * applications. This is not mandated by the PSA specification |
| * and may change in future versions. */ |
| TEST_EQUAL( status, 0 ); |
| TEST_ASSERT( slot_number != 0xec94d4a5058a1a21 ); |
| } |
| else |
| { |
| TEST_EQUAL( status, PSA_ERROR_INVALID_ARGUMENT ); |
| } |
| #endif |
| |
| /* Type and size */ |
| TEST_ASSERT( type != 0 ); |
| TEST_ASSERT( bits != 0 ); |
| TEST_ASSERT( bits <= PSA_MAX_KEY_BITS ); |
| if( PSA_KEY_TYPE_IS_UNSTRUCTURED( type ) ) |
| TEST_ASSERT( bits % 8 == 0 ); |
| |
| /* MAX macros concerning specific key types */ |
| if( PSA_KEY_TYPE_IS_ECC( type ) ) |
| TEST_ASSERT( bits <= PSA_VENDOR_ECC_MAX_CURVE_BITS ); |
| else if( PSA_KEY_TYPE_IS_RSA( type ) ) |
| TEST_ASSERT( bits <= PSA_VENDOR_RSA_MAX_KEY_BITS ); |
| TEST_ASSERT( PSA_BLOCK_CIPHER_BLOCK_LENGTH( type ) <= PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE ); |
| |
| ok = 1; |
| |
| exit: |
| /* |
| * Key attributes may have been returned by psa_get_key_attributes() |
| * thus reset them as required. |
| */ |
| psa_reset_key_attributes( &attributes ); |
| |
| return( ok ); |
| } |
| |
| static int exercise_mac_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage, |
| psa_algorithm_t alg ) |
| { |
| psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT; |
| const unsigned char input[] = "foo"; |
| unsigned char mac[PSA_MAC_MAX_SIZE] = {0}; |
| size_t mac_length = sizeof( mac ); |
| |
| /* Convert wildcard algorithm to exercisable algorithm */ |
| if( alg & PSA_ALG_MAC_AT_LEAST_THIS_LENGTH_FLAG ) |
| { |
| alg = PSA_ALG_TRUNCATED_MAC( alg, PSA_MAC_TRUNCATED_LENGTH( alg ) ); |
| } |
| |
| if( usage & PSA_KEY_USAGE_SIGN_HASH ) |
| { |
| PSA_ASSERT( psa_mac_sign_setup( &operation, key, alg ) ); |
| PSA_ASSERT( psa_mac_update( &operation, |
| input, sizeof( input ) ) ); |
| PSA_ASSERT( psa_mac_sign_finish( &operation, |
| mac, sizeof( mac ), |
| &mac_length ) ); |
| } |
| |
| if( usage & PSA_KEY_USAGE_VERIFY_HASH ) |
| { |
| psa_status_t verify_status = |
| ( usage & PSA_KEY_USAGE_SIGN_HASH ? |
| PSA_SUCCESS : |
| PSA_ERROR_INVALID_SIGNATURE ); |
| PSA_ASSERT( psa_mac_verify_setup( &operation, key, alg ) ); |
| PSA_ASSERT( psa_mac_update( &operation, |
| input, sizeof( input ) ) ); |
| TEST_EQUAL( psa_mac_verify_finish( &operation, mac, mac_length ), |
| verify_status ); |
| } |
| |
| return( 1 ); |
| |
| exit: |
| psa_mac_abort( &operation ); |
| return( 0 ); |
| } |
| |
| static int exercise_cipher_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage, |
| psa_algorithm_t alg ) |
| { |
| psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT; |
| unsigned char iv[16] = {0}; |
| size_t iv_length = sizeof( iv ); |
| const unsigned char plaintext[16] = "Hello, world..."; |
| unsigned char ciphertext[32] = "(wabblewebblewibblewobblewubble)"; |
| size_t ciphertext_length = sizeof( ciphertext ); |
| unsigned char decrypted[sizeof( ciphertext )]; |
| size_t part_length; |
| |
| if( usage & PSA_KEY_USAGE_ENCRYPT ) |
| { |
| PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) ); |
| PSA_ASSERT( psa_cipher_generate_iv( &operation, |
| iv, sizeof( iv ), |
| &iv_length ) ); |
| PSA_ASSERT( psa_cipher_update( &operation, |
| plaintext, sizeof( plaintext ), |
| ciphertext, sizeof( ciphertext ), |
| &ciphertext_length ) ); |
| PSA_ASSERT( psa_cipher_finish( &operation, |
| ciphertext + ciphertext_length, |
| sizeof( ciphertext ) - ciphertext_length, |
| &part_length ) ); |
| ciphertext_length += part_length; |
| } |
| |
| if( usage & PSA_KEY_USAGE_DECRYPT ) |
| { |
| psa_status_t status; |
| int maybe_invalid_padding = 0; |
| if( ! ( usage & PSA_KEY_USAGE_ENCRYPT ) ) |
| { |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| PSA_ASSERT( psa_get_key_attributes( key, &attributes ) ); |
| /* This should be PSA_CIPHER_GET_IV_SIZE but the API doesn't |
| * have this macro yet. */ |
| iv_length = PSA_BLOCK_CIPHER_BLOCK_LENGTH( |
| psa_get_key_type( &attributes ) ); |
| maybe_invalid_padding = ! PSA_ALG_IS_STREAM_CIPHER( alg ); |
| psa_reset_key_attributes( &attributes ); |
| } |
| PSA_ASSERT( psa_cipher_decrypt_setup( &operation, key, alg ) ); |
| PSA_ASSERT( psa_cipher_set_iv( &operation, |
| iv, iv_length ) ); |
| PSA_ASSERT( psa_cipher_update( &operation, |
| ciphertext, ciphertext_length, |
| decrypted, sizeof( decrypted ), |
| &part_length ) ); |
| status = psa_cipher_finish( &operation, |
| decrypted + part_length, |
| sizeof( decrypted ) - part_length, |
| &part_length ); |
| /* For a stream cipher, all inputs are valid. For a block cipher, |
| * if the input is some aribtrary data rather than an actual |
| ciphertext, a padding error is likely. */ |
| if( maybe_invalid_padding ) |
| TEST_ASSERT( status == PSA_SUCCESS || |
| status == PSA_ERROR_INVALID_PADDING ); |
| else |
| PSA_ASSERT( status ); |
| } |
| |
| return( 1 ); |
| |
| exit: |
| psa_cipher_abort( &operation ); |
| return( 0 ); |
| } |
| |
| static int exercise_aead_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage, |
| psa_algorithm_t alg ) |
| { |
| unsigned char nonce[16] = {0}; |
| size_t nonce_length = sizeof( nonce ); |
| unsigned char plaintext[16] = "Hello, world..."; |
| unsigned char ciphertext[48] = "(wabblewebblewibblewobblewubble)"; |
| size_t ciphertext_length = sizeof( ciphertext ); |
| size_t plaintext_length = sizeof( ciphertext ); |
| |
| /* Convert wildcard algorithm to exercisable algorithm */ |
| if( alg & PSA_ALG_AEAD_AT_LEAST_THIS_LENGTH_FLAG ) |
| { |
| alg = PSA_ALG_AEAD_WITH_SHORTENED_TAG( alg, PSA_ALG_AEAD_GET_TAG_LENGTH( alg ) ); |
| } |
| |
| /* Default IV length for AES-GCM is 12 bytes */ |
| if( PSA_ALG_AEAD_WITH_SHORTENED_TAG( alg, 0 ) == |
| PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_GCM, 0 ) ) |
| { |
| nonce_length = 12; |
| } |
| |
| /* IV length for CCM needs to be between 7 and 13 bytes */ |
| if( PSA_ALG_AEAD_WITH_SHORTENED_TAG( alg, 0 ) == |
| PSA_ALG_AEAD_WITH_SHORTENED_TAG( PSA_ALG_CCM, 0 ) ) |
| { |
| nonce_length = 12; |
| } |
| |
| if( usage & PSA_KEY_USAGE_ENCRYPT ) |
| { |
| PSA_ASSERT( psa_aead_encrypt( key, alg, |
| nonce, nonce_length, |
| NULL, 0, |
| plaintext, sizeof( plaintext ), |
| ciphertext, sizeof( ciphertext ), |
| &ciphertext_length ) ); |
| } |
| |
| if( usage & PSA_KEY_USAGE_DECRYPT ) |
| { |
| psa_status_t verify_status = |
| ( usage & PSA_KEY_USAGE_ENCRYPT ? |
| PSA_SUCCESS : |
| PSA_ERROR_INVALID_SIGNATURE ); |
| TEST_EQUAL( psa_aead_decrypt( key, alg, |
| nonce, nonce_length, |
| NULL, 0, |
| ciphertext, ciphertext_length, |
| plaintext, sizeof( plaintext ), |
| &plaintext_length ), |
| verify_status ); |
| } |
| |
| return( 1 ); |
| |
| exit: |
| return( 0 ); |
| } |
| |
| static int exercise_signature_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage, |
| psa_algorithm_t alg ) |
| { |
| if( usage & ( PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH ) ) |
| { |
| unsigned char payload[PSA_HASH_MAX_SIZE] = {1}; |
| size_t payload_length = 16; |
| unsigned char signature[PSA_SIGNATURE_MAX_SIZE] = {0}; |
| size_t signature_length = sizeof( signature ); |
| psa_algorithm_t hash_alg = PSA_ALG_SIGN_GET_HASH( alg ); |
| |
| /* If the policy allows signing with any hash, just pick one. */ |
| if( PSA_ALG_IS_SIGN_HASH( alg ) && hash_alg == PSA_ALG_ANY_HASH ) |
| { |
| #if defined(KNOWN_SUPPORTED_HASH_ALG) |
| hash_alg = KNOWN_SUPPORTED_HASH_ALG; |
| alg ^= PSA_ALG_ANY_HASH ^ hash_alg; |
| #else |
| TEST_ASSERT( ! "No hash algorithm for hash-and-sign testing" ); |
| #endif |
| } |
| |
| /* Some algorithms require the payload to have the size of |
| * the hash encoded in the algorithm. Use this input size |
| * even for algorithms that allow other input sizes. */ |
| if( hash_alg != 0 ) |
| payload_length = PSA_HASH_LENGTH( hash_alg ); |
| |
| if( usage & PSA_KEY_USAGE_SIGN_HASH ) |
| { |
| PSA_ASSERT( psa_sign_hash( key, alg, |
| payload, payload_length, |
| signature, sizeof( signature ), |
| &signature_length ) ); |
| } |
| |
| if( usage & PSA_KEY_USAGE_VERIFY_HASH ) |
| { |
| psa_status_t verify_status = |
| ( usage & PSA_KEY_USAGE_SIGN_HASH ? |
| PSA_SUCCESS : |
| PSA_ERROR_INVALID_SIGNATURE ); |
| TEST_EQUAL( psa_verify_hash( key, alg, |
| payload, payload_length, |
| signature, signature_length ), |
| verify_status ); |
| } |
| } |
| |
| if( usage & ( PSA_KEY_USAGE_SIGN_MESSAGE | PSA_KEY_USAGE_VERIFY_MESSAGE ) ) |
| { |
| unsigned char message[256] = "Hello, world..."; |
| unsigned char signature[PSA_SIGNATURE_MAX_SIZE] = {0}; |
| size_t message_length = 16; |
| size_t signature_length = sizeof( signature ); |
| |
| if( usage & PSA_KEY_USAGE_SIGN_MESSAGE ) |
| { |
| PSA_ASSERT( psa_sign_message( key, alg, |
| message, message_length, |
| signature, sizeof( signature ), |
| &signature_length ) ); |
| } |
| |
| if( usage & PSA_KEY_USAGE_VERIFY_MESSAGE ) |
| { |
| psa_status_t verify_status = |
| ( usage & PSA_KEY_USAGE_SIGN_MESSAGE ? |
| PSA_SUCCESS : |
| PSA_ERROR_INVALID_SIGNATURE ); |
| TEST_EQUAL( psa_verify_message( key, alg, |
| message, message_length, |
| signature, signature_length ), |
| verify_status ); |
| } |
| } |
| |
| return( 1 ); |
| |
| exit: |
| return( 0 ); |
| } |
| |
| static int exercise_asymmetric_encryption_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage, |
| psa_algorithm_t alg ) |
| { |
| unsigned char plaintext[256] = "Hello, world..."; |
| unsigned char ciphertext[256] = "(wabblewebblewibblewobblewubble)"; |
| size_t ciphertext_length = sizeof( ciphertext ); |
| size_t plaintext_length = 16; |
| |
| if( usage & PSA_KEY_USAGE_ENCRYPT ) |
| { |
| PSA_ASSERT( psa_asymmetric_encrypt( key, alg, |
| plaintext, plaintext_length, |
| NULL, 0, |
| ciphertext, sizeof( ciphertext ), |
| &ciphertext_length ) ); |
| } |
| |
| if( usage & PSA_KEY_USAGE_DECRYPT ) |
| { |
| psa_status_t status = |
| psa_asymmetric_decrypt( key, alg, |
| ciphertext, ciphertext_length, |
| NULL, 0, |
| plaintext, sizeof( plaintext ), |
| &plaintext_length ); |
| TEST_ASSERT( status == PSA_SUCCESS || |
| ( ( usage & PSA_KEY_USAGE_ENCRYPT ) == 0 && |
| ( status == PSA_ERROR_INVALID_ARGUMENT || |
| status == PSA_ERROR_INVALID_PADDING ) ) ); |
| } |
| |
| return( 1 ); |
| |
| exit: |
| return( 0 ); |
| } |
| |
| int mbedtls_test_psa_setup_key_derivation_wrap( |
| psa_key_derivation_operation_t* operation, |
| mbedtls_svc_key_id_t key, |
| psa_algorithm_t alg, |
| const unsigned char* input1, size_t input1_length, |
| const unsigned char* input2, size_t input2_length, |
| size_t capacity ) |
| { |
| PSA_ASSERT( psa_key_derivation_setup( operation, alg ) ); |
| if( PSA_ALG_IS_HKDF( alg ) ) |
| { |
| PSA_ASSERT( psa_key_derivation_input_bytes( operation, |
| PSA_KEY_DERIVATION_INPUT_SALT, |
| input1, input1_length ) ); |
| PSA_ASSERT( psa_key_derivation_input_key( operation, |
| PSA_KEY_DERIVATION_INPUT_SECRET, |
| key ) ); |
| PSA_ASSERT( psa_key_derivation_input_bytes( operation, |
| PSA_KEY_DERIVATION_INPUT_INFO, |
| input2, |
| input2_length ) ); |
| } |
| else if( PSA_ALG_IS_TLS12_PRF( alg ) || |
| PSA_ALG_IS_TLS12_PSK_TO_MS( alg ) ) |
| { |
| PSA_ASSERT( psa_key_derivation_input_bytes( operation, |
| PSA_KEY_DERIVATION_INPUT_SEED, |
| input1, input1_length ) ); |
| PSA_ASSERT( psa_key_derivation_input_key( operation, |
| PSA_KEY_DERIVATION_INPUT_SECRET, |
| key ) ); |
| PSA_ASSERT( psa_key_derivation_input_bytes( operation, |
| PSA_KEY_DERIVATION_INPUT_LABEL, |
| input2, input2_length ) ); |
| } |
| else |
| { |
| TEST_ASSERT( ! "Key derivation algorithm not supported" ); |
| } |
| |
| if( capacity != SIZE_MAX ) |
| PSA_ASSERT( psa_key_derivation_set_capacity( operation, capacity ) ); |
| |
| return( 1 ); |
| |
| exit: |
| return( 0 ); |
| } |
| |
| |
| static int exercise_key_derivation_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage, |
| psa_algorithm_t alg ) |
| { |
| psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT; |
| unsigned char input1[] = "Input 1"; |
| size_t input1_length = sizeof( input1 ); |
| unsigned char input2[] = "Input 2"; |
| size_t input2_length = sizeof( input2 ); |
| unsigned char output[1]; |
| size_t capacity = sizeof( output ); |
| |
| if( usage & PSA_KEY_USAGE_DERIVE ) |
| { |
| if( !mbedtls_test_psa_setup_key_derivation_wrap( &operation, key, alg, |
| input1, input1_length, |
| input2, input2_length, |
| capacity ) ) |
| goto exit; |
| |
| PSA_ASSERT( psa_key_derivation_output_bytes( &operation, |
| output, |
| capacity ) ); |
| PSA_ASSERT( psa_key_derivation_abort( &operation ) ); |
| } |
| |
| return( 1 ); |
| |
| exit: |
| return( 0 ); |
| } |
| |
| /* We need two keys to exercise key agreement. Exercise the |
| * private key against its own public key. */ |
| psa_status_t mbedtls_test_psa_key_agreement_with_self( |
| psa_key_derivation_operation_t *operation, |
| mbedtls_svc_key_id_t key ) |
| { |
| psa_key_type_t private_key_type; |
| psa_key_type_t public_key_type; |
| size_t key_bits; |
| uint8_t *public_key = NULL; |
| size_t public_key_length; |
| /* Return GENERIC_ERROR if something other than the final call to |
| * psa_key_derivation_key_agreement fails. This isn't fully satisfactory, |
| * but it's good enough: callers will report it as a failed test anyway. */ |
| psa_status_t status = PSA_ERROR_GENERIC_ERROR; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| |
| PSA_ASSERT( psa_get_key_attributes( key, &attributes ) ); |
| private_key_type = psa_get_key_type( &attributes ); |
| key_bits = psa_get_key_bits( &attributes ); |
| public_key_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( private_key_type ); |
| public_key_length = PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( public_key_type, key_bits ); |
| ASSERT_ALLOC( public_key, public_key_length ); |
| PSA_ASSERT( psa_export_public_key( key, public_key, public_key_length, |
| &public_key_length ) ); |
| |
| status = psa_key_derivation_key_agreement( |
| operation, PSA_KEY_DERIVATION_INPUT_SECRET, key, |
| public_key, public_key_length ); |
| exit: |
| /* |
| * Key attributes may have been returned by psa_get_key_attributes() |
| * thus reset them as required. |
| */ |
| psa_reset_key_attributes( &attributes ); |
| |
| mbedtls_free( public_key ); |
| return( status ); |
| } |
| |
| /* We need two keys to exercise key agreement. Exercise the |
| * private key against its own public key. */ |
| psa_status_t mbedtls_test_psa_raw_key_agreement_with_self( |
| psa_algorithm_t alg, |
| mbedtls_svc_key_id_t key ) |
| { |
| psa_key_type_t private_key_type; |
| psa_key_type_t public_key_type; |
| size_t key_bits; |
| uint8_t *public_key = NULL; |
| size_t public_key_length; |
| uint8_t output[1024]; |
| size_t output_length; |
| /* Return GENERIC_ERROR if something other than the final call to |
| * psa_key_derivation_key_agreement fails. This isn't fully satisfactory, |
| * but it's good enough: callers will report it as a failed test anyway. */ |
| psa_status_t status = PSA_ERROR_GENERIC_ERROR; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| |
| PSA_ASSERT( psa_get_key_attributes( key, &attributes ) ); |
| private_key_type = psa_get_key_type( &attributes ); |
| key_bits = psa_get_key_bits( &attributes ); |
| public_key_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( private_key_type ); |
| public_key_length = PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( public_key_type, key_bits ); |
| ASSERT_ALLOC( public_key, public_key_length ); |
| PSA_ASSERT( psa_export_public_key( key, |
| public_key, public_key_length, |
| &public_key_length ) ); |
| |
| status = psa_raw_key_agreement( alg, key, |
| public_key, public_key_length, |
| output, sizeof( output ), &output_length ); |
| if ( status == PSA_SUCCESS ) |
| { |
| TEST_ASSERT( output_length <= |
| PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE( private_key_type, |
| key_bits ) ); |
| TEST_ASSERT( output_length <= |
| PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE ); |
| } |
| |
| exit: |
| /* |
| * Key attributes may have been returned by psa_get_key_attributes() |
| * thus reset them as required. |
| */ |
| psa_reset_key_attributes( &attributes ); |
| |
| mbedtls_free( public_key ); |
| return( status ); |
| } |
| |
| static int exercise_raw_key_agreement_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage, |
| psa_algorithm_t alg ) |
| { |
| int ok = 0; |
| |
| if( usage & PSA_KEY_USAGE_DERIVE ) |
| { |
| /* We need two keys to exercise key agreement. Exercise the |
| * private key against its own public key. */ |
| PSA_ASSERT( mbedtls_test_psa_raw_key_agreement_with_self( alg, key ) ); |
| } |
| ok = 1; |
| |
| exit: |
| return( ok ); |
| } |
| |
| static int exercise_key_agreement_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage, |
| psa_algorithm_t alg ) |
| { |
| psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT; |
| unsigned char output[1]; |
| int ok = 0; |
| |
| if( usage & PSA_KEY_USAGE_DERIVE ) |
| { |
| /* We need two keys to exercise key agreement. Exercise the |
| * private key against its own public key. */ |
| PSA_ASSERT( psa_key_derivation_setup( &operation, alg ) ); |
| PSA_ASSERT( mbedtls_test_psa_key_agreement_with_self( &operation, key ) ); |
| PSA_ASSERT( psa_key_derivation_output_bytes( &operation, |
| output, |
| sizeof( output ) ) ); |
| PSA_ASSERT( psa_key_derivation_abort( &operation ) ); |
| } |
| ok = 1; |
| |
| exit: |
| return( ok ); |
| } |
| |
| int mbedtls_test_psa_exported_key_sanity_check( |
| psa_key_type_t type, size_t bits, |
| const uint8_t *exported, size_t exported_length ) |
| { |
| TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_OUTPUT_SIZE( type, bits ) ); |
| |
| if( PSA_KEY_TYPE_IS_UNSTRUCTURED( type ) ) |
| TEST_EQUAL( exported_length, PSA_BITS_TO_BYTES( bits ) ); |
| else |
| |
| #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PK_PARSE_C) |
| if( type == PSA_KEY_TYPE_RSA_KEY_PAIR ) |
| { |
| uint8_t *p = (uint8_t*) exported; |
| const uint8_t *end = exported + exported_length; |
| size_t len; |
| /* RSAPrivateKey ::= SEQUENCE { |
| * version INTEGER, -- must be 0 |
| * modulus INTEGER, -- n |
| * publicExponent INTEGER, -- e |
| * privateExponent INTEGER, -- d |
| * prime1 INTEGER, -- p |
| * prime2 INTEGER, -- q |
| * exponent1 INTEGER, -- d mod (p-1) |
| * exponent2 INTEGER, -- d mod (q-1) |
| * coefficient INTEGER, -- (inverse of q) mod p |
| * } |
| */ |
| TEST_EQUAL( mbedtls_asn1_get_tag( &p, end, &len, |
| MBEDTLS_ASN1_SEQUENCE | |
| MBEDTLS_ASN1_CONSTRUCTED ), 0 ); |
| TEST_EQUAL( len, end - p ); |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, 0, 0, 0 ) ) |
| goto exit; |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, bits, bits, 1 ) ) |
| goto exit; |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, 2, bits, 1 ) ) |
| goto exit; |
| /* Require d to be at least half the size of n. */ |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, bits / 2, bits, 1 ) ) |
| goto exit; |
| /* Require p and q to be at most half the size of n, rounded up. */ |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, bits / 2, bits / 2 + 1, 1 ) ) |
| goto exit; |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, bits / 2, bits / 2 + 1, 1 ) ) |
| goto exit; |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) ) |
| goto exit; |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) ) |
| goto exit; |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) ) |
| goto exit; |
| TEST_EQUAL( p - end, 0 ); |
| |
| TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_PAIR_MAX_SIZE ); |
| } |
| else |
| #endif /* MBEDTLS_RSA_C */ |
| |
| #if defined(MBEDTLS_ECP_C) |
| if( PSA_KEY_TYPE_IS_ECC_KEY_PAIR( type ) ) |
| { |
| /* Just the secret value */ |
| TEST_EQUAL( exported_length, PSA_BITS_TO_BYTES( bits ) ); |
| |
| TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_PAIR_MAX_SIZE ); |
| } |
| else |
| #endif /* MBEDTLS_ECP_C */ |
| |
| #if defined(MBEDTLS_RSA_C) |
| if( type == PSA_KEY_TYPE_RSA_PUBLIC_KEY ) |
| { |
| uint8_t *p = (uint8_t*) exported; |
| const uint8_t *end = exported + exported_length; |
| size_t len; |
| /* RSAPublicKey ::= SEQUENCE { |
| * modulus INTEGER, -- n |
| * publicExponent INTEGER } -- e |
| */ |
| TEST_EQUAL( mbedtls_asn1_get_tag( &p, end, &len, |
| MBEDTLS_ASN1_SEQUENCE | |
| MBEDTLS_ASN1_CONSTRUCTED ), |
| 0 ); |
| TEST_EQUAL( len, end - p ); |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, bits, bits, 1 ) ) |
| goto exit; |
| if( ! mbedtls_test_asn1_skip_integer( &p, end, 2, bits, 1 ) ) |
| goto exit; |
| TEST_EQUAL( p - end, 0 ); |
| |
| |
| TEST_ASSERT( exported_length <= |
| PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( type, bits ) ); |
| TEST_ASSERT( exported_length <= |
| PSA_EXPORT_PUBLIC_KEY_MAX_SIZE ); |
| } |
| else |
| #endif /* MBEDTLS_RSA_C */ |
| |
| #if defined(MBEDTLS_ECP_C) |
| if( PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY( type ) ) |
| { |
| |
| TEST_ASSERT( exported_length <= |
| PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( type, bits ) ); |
| TEST_ASSERT( exported_length <= |
| PSA_EXPORT_PUBLIC_KEY_MAX_SIZE ); |
| |
| if( PSA_KEY_TYPE_ECC_GET_FAMILY( type ) == PSA_ECC_FAMILY_MONTGOMERY ) |
| { |
| /* The representation of an ECC Montgomery public key is |
| * the raw compressed point */ |
| TEST_EQUAL( PSA_BITS_TO_BYTES( bits ), exported_length ); |
| } |
| else |
| { |
| /* The representation of an ECC Weierstrass public key is: |
| * - The byte 0x04; |
| * - `x_P` as a `ceiling(m/8)`-byte string, big-endian; |
| * - `y_P` as a `ceiling(m/8)`-byte string, big-endian; |
| * - where m is the bit size associated with the curve. |
| */ |
| TEST_EQUAL( 1 + 2 * PSA_BITS_TO_BYTES( bits ), exported_length ); |
| TEST_EQUAL( exported[0], 4 ); |
| } |
| } |
| else |
| #endif /* MBEDTLS_ECP_C */ |
| |
| { |
| TEST_ASSERT( ! "Sanity check not implemented for this key type" ); |
| } |
| |
| #if defined(MBEDTLS_DES_C) |
| if( type == PSA_KEY_TYPE_DES ) |
| { |
| /* Check the parity bits. */ |
| unsigned i; |
| for( i = 0; i < bits / 8; i++ ) |
| { |
| unsigned bit_count = 0; |
| unsigned m; |
| for( m = 1; m <= 0x100; m <<= 1 ) |
| { |
| if( exported[i] & m ) |
| ++bit_count; |
| } |
| TEST_ASSERT( bit_count % 2 != 0 ); |
| } |
| } |
| #endif |
| |
| return( 1 ); |
| |
| exit: |
| return( 0 ); |
| } |
| |
| static int exercise_export_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage ) |
| { |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| uint8_t *exported = NULL; |
| size_t exported_size = 0; |
| size_t exported_length = 0; |
| int ok = 0; |
| |
| PSA_ASSERT( psa_get_key_attributes( key, &attributes ) ); |
| |
| exported_size = PSA_EXPORT_KEY_OUTPUT_SIZE( |
| psa_get_key_type( &attributes ), |
| psa_get_key_bits( &attributes ) ); |
| ASSERT_ALLOC( exported, exported_size ); |
| |
| if( ( usage & PSA_KEY_USAGE_EXPORT ) == 0 && |
| ! PSA_KEY_TYPE_IS_PUBLIC_KEY( psa_get_key_type( &attributes ) ) ) |
| { |
| TEST_EQUAL( psa_export_key( key, exported, |
| exported_size, &exported_length ), |
| PSA_ERROR_NOT_PERMITTED ); |
| ok = 1; |
| goto exit; |
| } |
| |
| PSA_ASSERT( psa_export_key( key, |
| exported, exported_size, |
| &exported_length ) ); |
| ok = mbedtls_test_psa_exported_key_sanity_check( |
| psa_get_key_type( &attributes ), psa_get_key_bits( &attributes ), |
| exported, exported_length ); |
| |
| exit: |
| /* |
| * Key attributes may have been returned by psa_get_key_attributes() |
| * thus reset them as required. |
| */ |
| psa_reset_key_attributes( &attributes ); |
| |
| mbedtls_free( exported ); |
| return( ok ); |
| } |
| |
| static int exercise_export_public_key( mbedtls_svc_key_id_t key ) |
| { |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| psa_key_type_t public_type; |
| uint8_t *exported = NULL; |
| size_t exported_size = 0; |
| size_t exported_length = 0; |
| int ok = 0; |
| |
| PSA_ASSERT( psa_get_key_attributes( key, &attributes ) ); |
| if( ! PSA_KEY_TYPE_IS_ASYMMETRIC( psa_get_key_type( &attributes ) ) ) |
| { |
| exported_size = PSA_EXPORT_KEY_OUTPUT_SIZE( |
| psa_get_key_type( &attributes ), |
| psa_get_key_bits( &attributes ) ); |
| ASSERT_ALLOC( exported, exported_size ); |
| |
| TEST_EQUAL( psa_export_public_key( key, exported, |
| exported_size, &exported_length ), |
| PSA_ERROR_INVALID_ARGUMENT ); |
| ok = 1; |
| goto exit; |
| } |
| |
| public_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( |
| psa_get_key_type( &attributes ) ); |
| exported_size = PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( public_type, |
| psa_get_key_bits( &attributes ) ); |
| ASSERT_ALLOC( exported, exported_size ); |
| |
| PSA_ASSERT( psa_export_public_key( key, |
| exported, exported_size, |
| &exported_length ) ); |
| ok = mbedtls_test_psa_exported_key_sanity_check( |
| public_type, psa_get_key_bits( &attributes ), |
| exported, exported_length ); |
| |
| exit: |
| /* |
| * Key attributes may have been returned by psa_get_key_attributes() |
| * thus reset them as required. |
| */ |
| psa_reset_key_attributes( &attributes ); |
| |
| mbedtls_free( exported ); |
| return( ok ); |
| } |
| |
| int mbedtls_test_psa_exercise_key( mbedtls_svc_key_id_t key, |
| psa_key_usage_t usage, |
| psa_algorithm_t alg ) |
| { |
| int ok = 0; |
| |
| if( ! check_key_attributes_sanity( key ) ) |
| return( 0 ); |
| |
| if( alg == 0 ) |
| ok = 1; /* If no algorihm, do nothing (used for raw data "keys"). */ |
| else if( PSA_ALG_IS_MAC( alg ) ) |
| ok = exercise_mac_key( key, usage, alg ); |
| else if( PSA_ALG_IS_CIPHER( alg ) ) |
| ok = exercise_cipher_key( key, usage, alg ); |
| else if( PSA_ALG_IS_AEAD( alg ) ) |
| ok = exercise_aead_key( key, usage, alg ); |
| else if( PSA_ALG_IS_SIGN( alg ) ) |
| ok = exercise_signature_key( key, usage, alg ); |
| else if( PSA_ALG_IS_ASYMMETRIC_ENCRYPTION( alg ) ) |
| ok = exercise_asymmetric_encryption_key( key, usage, alg ); |
| else if( PSA_ALG_IS_KEY_DERIVATION( alg ) ) |
| ok = exercise_key_derivation_key( key, usage, alg ); |
| else if( PSA_ALG_IS_RAW_KEY_AGREEMENT( alg ) ) |
| ok = exercise_raw_key_agreement_key( key, usage, alg ); |
| else if( PSA_ALG_IS_KEY_AGREEMENT( alg ) ) |
| ok = exercise_key_agreement_key( key, usage, alg ); |
| else |
| TEST_ASSERT( ! "No code to exercise this category of algorithm" ); |
| |
| ok = ok && exercise_export_key( key, usage ); |
| ok = ok && exercise_export_public_key( key ); |
| |
| exit: |
| return( ok ); |
| } |
| |
| psa_key_usage_t mbedtls_test_psa_usage_to_exercise( psa_key_type_t type, |
| psa_algorithm_t alg ) |
| { |
| if( PSA_ALG_IS_MAC( alg ) || PSA_ALG_IS_SIGN( alg ) ) |
| { |
| if( PSA_ALG_IS_SIGN_HASH( alg ) ) |
| { |
| if( PSA_ALG_SIGN_GET_HASH( alg ) ) |
| return( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) ? |
| PSA_KEY_USAGE_VERIFY_HASH | PSA_KEY_USAGE_VERIFY_MESSAGE: |
| PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH | |
| PSA_KEY_USAGE_SIGN_MESSAGE | PSA_KEY_USAGE_VERIFY_MESSAGE ); |
| } |
| else if( PSA_ALG_IS_SIGN_MESSAGE( alg) ) |
| return( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) ? |
| PSA_KEY_USAGE_VERIFY_MESSAGE : |
| PSA_KEY_USAGE_SIGN_MESSAGE | PSA_KEY_USAGE_VERIFY_MESSAGE ); |
| |
| return( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) ? |
| PSA_KEY_USAGE_VERIFY_HASH : |
| PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_VERIFY_HASH ); |
| } |
| else if( PSA_ALG_IS_CIPHER( alg ) || PSA_ALG_IS_AEAD( alg ) || |
| PSA_ALG_IS_ASYMMETRIC_ENCRYPTION( alg ) ) |
| { |
| return( PSA_KEY_TYPE_IS_PUBLIC_KEY( type ) ? |
| PSA_KEY_USAGE_ENCRYPT : |
| PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT ); |
| } |
| else if( PSA_ALG_IS_KEY_DERIVATION( alg ) || |
| PSA_ALG_IS_KEY_AGREEMENT( alg ) ) |
| { |
| return( PSA_KEY_USAGE_DERIVE ); |
| } |
| else |
| { |
| return( 0 ); |
| } |
| |
| } |
| |
| #endif /* MBEDTLS_PSA_CRYPTO_C */ |