/* * PSA ECP layer on top of Mbed TLS crypto */ /* * 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_CRYPTO_ECP_H #define PSA_CRYPTO_ECP_H #include #include /** 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 ); /** 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 * \retval #PSA_ERROR_INSUFFICIENT_MEMORY * \retval #PSA_ERROR_CORRUPTION_DETECTED */ 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 * \retval #PSA_ERROR_COMMUNICATION_FAILURE * \retval #PSA_ERROR_HARDWARE_FAILURE * \retval #PSA_ERROR_CORRUPTION_DETECTED * \retval #PSA_ERROR_STORAGE_FAILURE * \retval #PSA_ERROR_INSUFFICIENT_MEMORY */ 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 ); /* * BEYOND THIS POINT, TEST DRIVER ENTRY POINTS ONLY. */ #if defined(PSA_CRYPTO_DRIVER_TEST) psa_status_t mbedtls_transparent_test_driver_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 ); psa_status_t mbedtls_transparent_test_driver_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 ); #endif /* PSA_CRYPTO_DRIVER_TEST */ #endif /* PSA_CRYPTO_ECP_H */