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feat(crypto): Implement ECDSA component
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#include "ecdsa.h" | ||
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#define logger_id crypto_logger_id | ||
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static void dump_buf(char *title, unsigned char *buf, const int len) { | ||
char dump[len + 1]; | ||
for (int i = 0; i < len; i++) { | ||
dump[i * 2] = "0123456789ABCDEF"[buf[i] / 16]; | ||
dump[i * 2 + 1] = "0123456789ABCDEF"[buf[i] % 16]; | ||
} | ||
ta_log_debug("%s%s\n", title, dump); | ||
} | ||
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status_t ecdsa_gen_key_pair(mbedtls_ecdsa_context *ctx_sign, mbedtls_ctr_drbg_context *ctr_drbg) { | ||
int ret = 1; | ||
status_t sc = SC_OK; | ||
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if ((ret = mbedtls_ecdsa_genkey(ctx_sign, MBEDTLS_ECP_DP_SECP192R1, mbedtls_ctr_drbg_random, ctr_drbg)) != 0) { | ||
ta_log_error("mbedtls_ecdsa_genkey returned %d\n", ret); | ||
sc = SC_CRYPTO_GEN_KEY; | ||
} | ||
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return sc; | ||
} | ||
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status_t compute_sha256(unsigned char *msg, const int msg_len, unsigned char *hash) { | ||
int ret = 1; | ||
status_t sc = SC_OK; | ||
if ((ret = mbedtls_sha256_ret(msg, msg_len, hash, 0)) != 0) { | ||
ta_log_error("mbedtls_sha256_ret returned %d\n", ret); | ||
sc = SC_CRYPTO_HASH; | ||
} | ||
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return sc; | ||
} | ||
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status_t ecdsa_sign_msg(mbedtls_ecdsa_context *ctx_sign, mbedtls_ctr_drbg_context *ctr_drbg, unsigned char *hash, | ||
const uint16_t hash_len, unsigned char *sig, size_t *sig_len) { | ||
int ret = 1; | ||
status_t sc = SC_OK; | ||
if ((ret = mbedtls_ecdsa_write_signature(ctx_sign, MBEDTLS_MD_SHA256, hash, hash_len, sig, sig_len, | ||
mbedtls_ctr_drbg_random, ctr_drbg)) != 0) { | ||
ta_log_error("mbedtls_ecdsa_write_signature returned %d\n", ret); | ||
sc = SC_CRYPTO_ECDSA_SIGN; | ||
} | ||
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return sc; | ||
} |
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/* | ||
* Copyright (C) 2020 BiiLabs Co., Ltd. and Contributors | ||
* All Rights Reserved. | ||
* This is free software; you can redistribute it and/or modify it under the | ||
* terms of the MIT license. A copy of the license can be found in the file | ||
* "LICENSE" at the root of this distribution. | ||
*/ | ||
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#include "mbedtls/config.h" | ||
#include "mbedtls/platform.h" | ||
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#include "mbedtls/ctr_drbg.h" | ||
#include "mbedtls/ecdsa.h" | ||
#include "mbedtls/entropy.h" | ||
#include "mbedtls/sha256.h" | ||
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#include <string.h> | ||
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#include "common/logger.h" | ||
#include "common/ta_errors.h" | ||
#include "randomness.h" | ||
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#define SHA256_LEN 32 | ||
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/** | ||
* @brief Generate ECDSA key pair | ||
* | ||
* @param[in] ctx_sign ECDSA context for signing | ||
* @param[in] ctr_drbg Counter-mode block-cipher-based Deterministic Random Bit Generator object | ||
* | ||
* @return | ||
* - SC_OK on success | ||
* - non-zero on error | ||
*/ | ||
status_t ecdsa_gen_key_pair(mbedtls_ecdsa_context *ctx_sign, mbedtls_ctr_drbg_context *ctr_drbg); | ||
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/** | ||
* @brief Compute SHA256 | ||
* | ||
* @param[in] msg Message is going to be hashed | ||
* @param[in] msg_len The length of message | ||
* @param[out] hash The output hash result | ||
* | ||
* @return | ||
* - SC_OK on success | ||
* - non-zero on error | ||
*/ | ||
status_t compute_sha256(unsigned char *msg, const int msg_len, unsigned char *hash); | ||
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/** | ||
* @brief Sign messega with ECDSA | ||
* | ||
* @param[in] ctx_sign ECDSA context for signing | ||
* @param[in] ctr_drbg Counter-mode block-cipher-based Deterministic Random Bit Generator object | ||
* @param[in] input The input string | ||
* @param[in] input_len The length of input string | ||
* @param[out] sig Output signed message | ||
* @param[out] sig_len The length of signed message | ||
* | ||
* @return | ||
* - SC_OK on success | ||
* - non-zero on error | ||
*/ | ||
status_t ecdsa_sign_msg(mbedtls_ecdsa_context *ctx_sign, mbedtls_ctr_drbg_context *ctr_drbg, unsigned char *input, | ||
const uint16_t input_len, unsigned char *sig, size_t *sig_len); |
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#include "randomness.h" | ||
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#define CRYPTO_LOGGER "crypto" | ||
#define logger_id crypto_logger_id | ||
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void crypto_logger_init() { logger_id = logger_helper_enable(CRYPTO_LOGGER, LOGGER_DEBUG, true); } | ||
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int crypto_logger_release() { | ||
logger_helper_release(logger_id); | ||
return 0; | ||
} | ||
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status_t rand_num_gen_init(mbedtls_entropy_context *entropy, mbedtls_ctr_drbg_context *ctr_drbg, char *rand_seed, | ||
uint16_t seed_len) { | ||
int ret = 1; | ||
status_t sc = SC_OK; | ||
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mbedtls_ctr_drbg_init(ctr_drbg); | ||
mbedtls_entropy_init(entropy); | ||
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if ((ret = mbedtls_ctr_drbg_seed(ctr_drbg, mbedtls_entropy_func, entropy, (const unsigned char *)rand_seed, | ||
seed_len)) != 0) { | ||
ta_log_error("mbedtls_ctr_drbg_seed returned %d\n", ret); | ||
sc = SC_CRYPTO_RAND_INIT; | ||
} | ||
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return sc; | ||
} | ||
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void rand_num_gen_release(mbedtls_entropy_context *entropy, mbedtls_ctr_drbg_context *ctr_drbg) { | ||
mbedtls_ctr_drbg_free(ctr_drbg); | ||
mbedtls_entropy_free(entropy); | ||
} |
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