/* * PSA ECP layer on top of Mbed TLS crypto */ /* * Copyright The Mbed TLS Contributors * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ #ifndef PSA_CRYPTO_ECP_H #define PSA_CRYPTO_ECP_H #include <psa/crypto.h> #include <mbedtls/ecp.h> /** Load the contents of a key buffer into an internal ECP representation * * \param[in] type The type of key contained in \p data. * \param[in] curve_bits The nominal bit-size of the curve. * It must be consistent with the representation * passed in \p data. * This can be 0, in which case the bit-size * is inferred from \p data_length (which is possible * for all key types and representation formats * formats that are currently supported or will * be in the foreseeable future). * \param[in] data The buffer from which to load the representation. * \param[in] data_length The size in bytes of \p data. * \param[out] p_ecp Returns a pointer to an ECP context on success. * The caller is responsible for freeing both the * contents of the context and the context itself * when done. */ psa_status_t mbedtls_psa_ecp_load_representation(psa_key_type_t type, size_t curve_bits, const uint8_t *data, size_t data_length, mbedtls_ecp_keypair **p_ecp); /** Load the public part of an internal ECP, if required. * * \param ecp The ECP context to load the public part for. * * \return PSA_SUCCESS on success, otherwise an MPI error. */ psa_status_t mbedtls_psa_ecp_load_public_part(mbedtls_ecp_keypair *ecp); /** Import an ECP key in binary format. * * \note The signature of this function is that of a PSA driver * import_key entry point. This function behaves as an import_key * entry point as defined in the PSA driver interface specification for * transparent drivers. * * \param[in] attributes The attributes for the key to import. * \param[in] data The buffer containing the key data in import * format. * \param[in] data_length Size of the \p data buffer in bytes. * \param[out] key_buffer The buffer containing the key data in output * format. * \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes. This * size is greater or equal to \p data_length. * \param[out] key_buffer_length The length of the data written in \p * key_buffer in bytes. * \param[out] bits The key size in number of bits. * * \retval #PSA_SUCCESS The ECP key was imported successfully. * \retval #PSA_ERROR_INVALID_ARGUMENT * The key data is not correctly formatted. * \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription * \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription * \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription */ psa_status_t mbedtls_psa_ecp_import_key( const psa_key_attributes_t *attributes, const uint8_t *data, size_t data_length, uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length, size_t *bits); /** Export an ECP key to export representation * * \param[in] type The type of key (public/private) to export * \param[in] ecp The internal ECP representation from which to export * \param[out] data The buffer to export to * \param[in] data_size The length of the buffer to export to * \param[out] data_length The amount of bytes written to \p data */ psa_status_t mbedtls_psa_ecp_export_key(psa_key_type_t type, mbedtls_ecp_keypair *ecp, uint8_t *data, size_t data_size, size_t *data_length); /** Export an ECP public key or the public part of an ECP key pair in binary * format. * * \note The signature of this function is that of a PSA driver * export_public_key entry point. This function behaves as an * export_public_key entry point as defined in the PSA driver interface * specification. * * \param[in] attributes The attributes for the key to export. * \param[in] key_buffer Material or context of the key to export. * \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes. * \param[out] data Buffer where the key data is to be written. * \param[in] data_size Size of the \p data buffer in bytes. * \param[out] data_length On success, the number of bytes written in * \p data * * \retval #PSA_SUCCESS The ECP public key was exported successfully. * \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription * \retval #PSA_ERROR_COMMUNICATION_FAILURE \emptydescription * \retval #PSA_ERROR_HARDWARE_FAILURE \emptydescription * \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription * \retval #PSA_ERROR_STORAGE_FAILURE \emptydescription * \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription */ psa_status_t mbedtls_psa_ecp_export_public_key( const psa_key_attributes_t *attributes, const uint8_t *key_buffer, size_t key_buffer_size, uint8_t *data, size_t data_size, size_t *data_length); /** * \brief Generate an ECP key. * * \note The signature of the function is that of a PSA driver generate_key * entry point. * * \param[in] attributes The attributes for the ECP key to generate. * \param[out] key_buffer Buffer where the key data is to be written. * \param[in] key_buffer_size Size of \p key_buffer in bytes. * \param[out] key_buffer_length On success, the number of bytes written in * \p key_buffer. * * \retval #PSA_SUCCESS * The key was successfully generated. * \retval #PSA_ERROR_NOT_SUPPORTED * Key length or type not supported. * \retval #PSA_ERROR_BUFFER_TOO_SMALL * The size of \p key_buffer is too small. */ psa_status_t mbedtls_psa_ecp_generate_key( const psa_key_attributes_t *attributes, uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length); /** Sign an already-calculated hash with ECDSA. * * \note The signature of this function is that of a PSA driver * sign_hash entry point. This function behaves as a sign_hash * entry point as defined in the PSA driver interface specification for * transparent drivers. * * \param[in] attributes The attributes of the ECC key to use for the * operation. * \param[in] key_buffer The buffer containing the ECC key context. * format. * \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes. * \param[in] alg Randomized or deterministic ECDSA algorithm. * \param[in] hash The hash or message to sign. * \param[in] hash_length Size of the \p hash buffer in bytes. * \param[out] signature Buffer where the signature is to be written. * \param[in] signature_size Size of the \p signature buffer in bytes. * \param[out] signature_length On success, the number of bytes * that make up the returned signature value. * * \retval #PSA_SUCCESS \emptydescription * \retval #PSA_ERROR_BUFFER_TOO_SMALL * The size of the \p signature buffer is too small. You can * determine a sufficient buffer size by calling * #PSA_SIGN_OUTPUT_SIZE(\c PSA_KEY_TYPE_ECC_KEY_PAIR, \c key_bits, * \p alg) where \c key_bits is the bit-size of the ECC key. * \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription * \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription * \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription * \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription * \retval #PSA_ERROR_INSUFFICIENT_ENTROPY \emptydescription */ psa_status_t mbedtls_psa_ecdsa_sign_hash( const psa_key_attributes_t *attributes, const uint8_t *key_buffer, size_t key_buffer_size, psa_algorithm_t alg, const uint8_t *hash, size_t hash_length, uint8_t *signature, size_t signature_size, size_t *signature_length); /** * \brief Verify an ECDSA hash or short message signature. * * \note The signature of this function is that of a PSA driver * verify_hash entry point. This function behaves as a verify_hash * entry point as defined in the PSA driver interface specification for * transparent drivers. * * \param[in] attributes The attributes of the ECC key to use for the * operation. * \param[in] key_buffer The buffer containing the ECC key context. * format. * \param[in] key_buffer_size Size of the \p key_buffer buffer in bytes. * \param[in] alg Randomized or deterministic ECDSA algorithm. * \param[in] hash The hash or message whose signature is to be * verified. * \param[in] hash_length Size of the \p hash buffer in bytes. * \param[in] signature Buffer containing the signature to verify. * \param[in] signature_length Size of the \p signature buffer in bytes. * * \retval #PSA_SUCCESS * The signature is valid. * \retval #PSA_ERROR_INVALID_SIGNATURE * The calculation was performed successfully, but the passed * signature is not a valid signature. * \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription * \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription * \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription */ psa_status_t mbedtls_psa_ecdsa_verify_hash( const psa_key_attributes_t *attributes, const uint8_t *key_buffer, size_t key_buffer_size, psa_algorithm_t alg, const uint8_t *hash, size_t hash_length, const uint8_t *signature, size_t signature_length); /** Perform a key agreement and return the raw ECDH shared secret. * * \note The signature of this function is that of a PSA driver * key_agreement entry point. This function behaves as a key_agreement * entry point as defined in the PSA driver interface specification for * transparent drivers. * * \param[in] attributes The attributes of the key to use for the * operation. * \param[in] key_buffer The buffer containing the private key * context. * \param[in] key_buffer_size Size of the \p key_buffer buffer in * bytes. * \param[in] alg A key agreement algorithm that is * compatible with the type of the key. * \param[in] peer_key The buffer containing the key context * of the peer's public key. * \param[in] peer_key_length Size of the \p peer_key buffer in * bytes. * \param[out] shared_secret The buffer to which the shared secret * is to be written. * \param[in] shared_secret_size Size of the \p shared_secret buffer in * bytes. * \param[out] shared_secret_length On success, the number of bytes that make * up the returned shared secret. * \retval #PSA_SUCCESS * Success. Shared secret successfully calculated. * \retval #PSA_ERROR_INVALID_HANDLE \emptydescription * \retval #PSA_ERROR_NOT_PERMITTED \emptydescription * \retval #PSA_ERROR_INVALID_ARGUMENT * \p alg is not a key agreement algorithm, or * \p private_key is not compatible with \p alg, * or \p peer_key is not valid for \p alg or not compatible with * \p private_key. * \retval #PSA_ERROR_BUFFER_TOO_SMALL * \p shared_secret_size is too small * \retval #PSA_ERROR_NOT_SUPPORTED * \p alg is not a supported key agreement algorithm. * \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription * \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription */ psa_status_t mbedtls_psa_key_agreement_ecdh( const psa_key_attributes_t *attributes, const uint8_t *key_buffer, size_t key_buffer_size, psa_algorithm_t alg, const uint8_t *peer_key, size_t peer_key_length, uint8_t *shared_secret, size_t shared_secret_size, size_t *shared_secret_length); #endif /* PSA_CRYPTO_ECP_H */
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