/** 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. */ #ifndef PSA_EXERCISE_KEY_H #define PSA_EXERCISE_KEY_H #include "test/helpers.h" #include "test/psa_crypto_helpers.h" #include /** \def KNOWN_SUPPORTED_HASH_ALG * * A hash algorithm that is known to be supported. * * This is used in some smoke tests. */ #if defined(PSA_WANT_ALG_MD5) #define KNOWN_SUPPORTED_HASH_ALG PSA_ALG_MD5 /* MBEDTLS_RIPEMD160_C omitted. This is necessary for the sake of * exercise_signature_key() because Mbed TLS doesn't support RIPEMD160 * in RSA PKCS#1v1.5 signatures. A RIPEMD160-only configuration would be * implausible anyway. */ #elif defined(PSA_WANT_ALG_SHA_1) #define KNOWN_SUPPORTED_HASH_ALG PSA_ALG_SHA_1 #elif defined(PSA_WANT_ALG_SHA_256) #define KNOWN_SUPPORTED_HASH_ALG PSA_ALG_SHA_256 #elif defined(PSA_WANT_ALG_SHA_384) #define KNOWN_SUPPORTED_HASH_ALG PSA_ALG_SHA_384 #elif defined(PSA_WANT_ALG_SHA_512) #define KNOWN_SUPPORTED_HASH_ALG PSA_ALG_SHA_512 #elif defined(PSA_WANT_ALG_SHA3_256) #define KNOWN_SUPPORTED_HASH_ALG PSA_ALG_SHA3_256 #else #undef KNOWN_SUPPORTED_HASH_ALG #endif /** \def KNOWN_SUPPORTED_BLOCK_CIPHER * * A block cipher that is known to be supported. * * For simplicity's sake, stick to block ciphers with 16-byte blocks. */ #if defined(MBEDTLS_AES_C) #define KNOWN_SUPPORTED_BLOCK_CIPHER PSA_KEY_TYPE_AES #elif defined(MBEDTLS_ARIA_C) #define KNOWN_SUPPORTED_BLOCK_CIPHER PSA_KEY_TYPE_ARIA #elif defined(MBEDTLS_CAMELLIA_C) #define KNOWN_SUPPORTED_BLOCK_CIPHER PSA_KEY_TYPE_CAMELLIA #undef KNOWN_SUPPORTED_BLOCK_CIPHER #endif /** \def KNOWN_SUPPORTED_MAC_ALG * * A MAC mode that is known to be supported. * * It must either be HMAC with #KNOWN_SUPPORTED_HASH_ALG or * a block cipher-based MAC with #KNOWN_SUPPORTED_BLOCK_CIPHER. * * This is used in some smoke tests. */ #if defined(KNOWN_SUPPORTED_HASH_ALG) && defined(PSA_WANT_ALG_HMAC) #define KNOWN_SUPPORTED_MAC_ALG ( PSA_ALG_HMAC( KNOWN_SUPPORTED_HASH_ALG ) ) #define KNOWN_SUPPORTED_MAC_KEY_TYPE PSA_KEY_TYPE_HMAC #elif defined(KNOWN_SUPPORTED_BLOCK_CIPHER) && defined(MBEDTLS_CMAC_C) #define KNOWN_SUPPORTED_MAC_ALG PSA_ALG_CMAC #define KNOWN_SUPPORTED_MAC_KEY_TYPE KNOWN_SUPPORTED_BLOCK_CIPHER #else #undef KNOWN_SUPPORTED_MAC_ALG #undef KNOWN_SUPPORTED_MAC_KEY_TYPE #endif /** \def KNOWN_SUPPORTED_BLOCK_CIPHER_ALG * * A cipher algorithm and key type that are known to be supported. * * This is used in some smoke tests. */ #if defined(KNOWN_SUPPORTED_BLOCK_CIPHER) && defined(MBEDTLS_CIPHER_MODE_CTR) #define KNOWN_SUPPORTED_BLOCK_CIPHER_ALG PSA_ALG_CTR #elif defined(KNOWN_SUPPORTED_BLOCK_CIPHER) && defined(MBEDTLS_CIPHER_MODE_CBC) #define KNOWN_SUPPORTED_BLOCK_CIPHER_ALG PSA_ALG_CBC_NO_PADDING #elif defined(KNOWN_SUPPORTED_BLOCK_CIPHER) && defined(MBEDTLS_CIPHER_MODE_CFB) #define KNOWN_SUPPORTED_BLOCK_CIPHER_ALG PSA_ALG_CFB #elif defined(KNOWN_SUPPORTED_BLOCK_CIPHER) && defined(MBEDTLS_CIPHER_MODE_OFB) #define KNOWN_SUPPORTED_BLOCK_CIPHER_ALG PSA_ALG_OFB #else #undef KNOWN_SUPPORTED_BLOCK_CIPHER_ALG #endif #if defined(KNOWN_SUPPORTED_BLOCK_CIPHER_ALG) #define KNOWN_SUPPORTED_CIPHER_ALG KNOWN_SUPPORTED_BLOCK_CIPHER_ALG #define KNOWN_SUPPORTED_CIPHER_KEY_TYPE KNOWN_SUPPORTED_BLOCK_CIPHER #else #undef KNOWN_SUPPORTED_CIPHER_ALG #undef KNOWN_SUPPORTED_CIPHER_KEY_TYPE #endif /** Convenience function to set up a key derivation. * * In case of failure, mark the current test case as failed. * * The inputs \p input1 and \p input2 are, in order: * - HKDF: salt, info. * - TKS 1.2 PRF, TLS 1.2 PSK-to-MS: seed, label. * * \param operation The operation object to use. * It must be in the initialized state. * \param key The key to use. * \param alg The algorithm to use. * \param input1 The first input to pass. * \param input1_length The length of \p input1 in bytes. * \param input2 The first input to pass. * \param input2_length The length of \p input2 in bytes. * \param capacity The capacity to set. * * \return \c 1 on success, \c 0 on failure. */ 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 ); /** Perform a key agreement using the given key pair against its public key * using psa_raw_key_agreement(). * * The result is discarded. The purpose of this function is to smoke-test a key. * * In case of failure, mark the current test case as failed. * * \param alg A key agreement algorithm compatible with \p key. * \param key A key that allows key agreement with \p alg. * * \return \c 1 on success, \c 0 on failure. */ psa_status_t mbedtls_test_psa_raw_key_agreement_with_self( psa_algorithm_t alg, mbedtls_svc_key_id_t key ); /** Perform a key agreement using the given key pair against its public key * using psa_key_derivation_raw_key(). * * The result is discarded. The purpose of this function is to smoke-test a key. * * In case of failure, mark the current test case as failed. * * \param operation An operation that has been set up for a key * agreement algorithm that is compatible with * \p key. * \param key A key pair object that is suitable for a key * agreement with \p operation. * * \return \c 1 on success, \c 0 on failure. */ psa_status_t mbedtls_test_psa_key_agreement_with_self( psa_key_derivation_operation_t *operation, mbedtls_svc_key_id_t key ); /** Perform sanity checks on the given key representation. * * If any of the checks fail, mark the current test case as failed. * * The checks depend on the key type. * - All types: check the export size against maximum-size macros. * - DES: parity bits. * - RSA: check the ASN.1 structure and the size and parity of the integers. * - ECC private or public key: exact representation length. * - Montgomery public key: first byte. * * \param type The key type. * \param bits The key size in bits. * \param exported A buffer containing the key representation. * \param exported_length The length of \p exported in bytes. * * \return \c 1 if all checks passed, \c 0 on failure. */ int mbedtls_test_psa_exported_key_sanity_check( psa_key_type_t type, size_t bits, const uint8_t *exported, size_t exported_length ); /** Do smoke tests on a key. * * Perform one of each operation indicated by \p alg (decrypt/encrypt, * sign/verify, or derivation) that is permitted according to \p usage. * \p usage and \p alg should correspond to the expected policy on the * key. * * Export the key if permitted by \p usage, and check that the output * looks sensible. If \p usage forbids export, check that * \p psa_export_key correctly rejects the attempt. If the key is * asymmetric, also check \p psa_export_public_key. * * If the key fails the tests, this function calls the test framework's * `mbedtls_test_fail` function and returns false. Otherwise this function * returns true. Therefore it should be used as follows: * ``` * if( ! exercise_key( ... ) ) goto exit; * ``` * * \param key The key to exercise. It should be capable of performing * \p alg. * \param usage The usage flags to assume. * \param alg The algorithm to exercise. * * \retval 0 The key failed the smoke tests. * \retval 1 The key passed the smoke tests. */ int mbedtls_test_psa_exercise_key( mbedtls_svc_key_id_t key, psa_key_usage_t usage, psa_algorithm_t alg ); psa_key_usage_t mbedtls_test_psa_usage_to_exercise( psa_key_type_t type, psa_algorithm_t alg ); #endif /* PSA_EXERCISE_KEY_H */