/** * Copyright (c) 2016 - 2019, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ /** * @defgroup ecc Elliptic Curve Cryptography interface * @{ * @ingroup app_common * @brief Elliptic Curve Cryptography interface */ #ifndef ECC_H__ #define ECC_H__ #include #include #include "nordic_common.h" #include "nrf_error.h" #include "sdk_errors.h" #ifdef __cplusplus extern "C" { #endif #define ECC_P256_SK_LEN 32 #define ECC_P256_PK_LEN 64 /**@brief Initialize the ECC module. * * @param[in] rng Use a random number generator. * * */ void ecc_init(bool rng); /**@brief Create a public/private key pair. * * @param[out] p_le_sk Private key. Pointer must be aligned to a 4-byte boundary. * @param[out] p_le_pk Public key. Pointer must be aligned to a 4-byte boundary. * * @retval NRF_SUCCESS Key pair successfuly created. * @retval NRF_ERROR_NULL NULL pointer provided. * @retval NRF_ERROR_INVALID_ADDR Unaligned pointer provided. * @retval NRF_ERROR_INTERNAL Internal error during key generation. */ ret_code_t ecc_p256_keypair_gen(uint8_t *p_le_sk, uint8_t* p_le_pk); /**@brief Create a public key from a provided private key. * * @param[in] p_le_sk Private key. Pointer must be aligned to a 4-byte boundary. * @param[out] p_le_pk Public key. Pointer must be aligned to a 4-byte boundary. * * @retval NRF_SUCCESS Public key successfuly created. * @retval NRF_ERROR_NULL NULL pointer provided. * @retval NRF_ERROR_INVALID_ADDR Unaligned pointer provided. * @retval NRF_ERROR_INTERNAL Internal error during key generation. */ ret_code_t ecc_p256_public_key_compute(uint8_t const *p_le_sk, uint8_t* p_le_pk); /**@brief Create a shared secret from a provided public/private key pair. * * @param[in] p_le_sk Private key. Pointer must be aligned to a 4-byte boundary. * @param[in] p_le_pk Public key. Pointer must be aligned to a 4-byte boundary. * @param[out] p_le_ss Shared secret. Pointer must be aligned to a 4-byte boundary. * * @retval NRF_SUCCESS Shared secret successfuly created. * @retval NRF_ERROR_NULL NULL pointer provided. * @retval NRF_ERROR_INVALID_ADDR Unaligned pointer provided. * @retval NRF_ERROR_INTERNAL Internal error during key generation. */ ret_code_t ecc_p256_shared_secret_compute(uint8_t const *p_le_sk, uint8_t const * p_le_pk, uint8_t *p_le_ss); /**@brief Sign a hash or digest using a private key. * * @param[in] p_le_sk Private key. Pointer must be aligned to a 4-byte boundary. * @param[in] p_le_hash Hash. Pointer must be aligned to a 4-byte boundary. * @param[in] hlen Hash length in bytes. * @param[out] p_le_sig Signature. Pointer must be aligned to a 4-byte boundary. * * @retval NRF_SUCCESS Signature successfuly created. * @retval NRF_ERROR_NULL NULL pointer provided. * @retval NRF_ERROR_INVALID_ADDR Unaligned pointer provided. * @retval NRF_ERROR_INTERNAL Internal error during signature generation. */ ret_code_t ecc_p256_sign(uint8_t const *p_le_sk, uint8_t const * p_le_hash, uint32_t hlen, uint8_t *p_le_sig); /**@brief Verify a signature using a public key. * * @param[in] p_le_pk Public key. Pointer must be aligned to a 4-byte boundary. * @param[in] p_le_hash Hash. Pointer must be aligned to a 4-byte boundary. * @param[in] hlen Hash length in bytes. * @param[in] p_le_sig Signature. Pointer must be aligned to a 4-byte boundary. * * @retval NRF_SUCCESS Signature verified. * @retval NRF_ERROR_INVALID_DATA Signature failed verification. * @retval NRF_ERROR_NULL NULL pointer provided. * @retval NRF_ERROR_INVALID_ADDR Unaligned pointer provided. * @retval NRF_ERROR_INTERNAL Internal error during signature verification. */ ret_code_t ecc_p256_verify(uint8_t const *p_le_pk, uint8_t const * p_le_hash, uint32_t hlen, uint8_t const *p_le_sig); #ifdef __cplusplus } #endif #endif // ECC_H__ /** @} */