C++ (Cpp) secp256k1_rfc6979_hmac_sha256_initializeの例

コード例 #1

ファイル: secp256k1.c プロジェクト: apoelstra/secp256k1

static int nonce_function_rfc6979(unsigned char *nonce32, const unsigned char *msg32, const unsigned char *key32, const unsigned char *algo16, void *data, unsigned int counter) {
   unsigned char keydata[112];
   unsigned int offset = 0;
   secp256k1_rfc6979_hmac_sha256 rng;
   unsigned int i;
   /* We feed a byte array to the PRNG as input, consisting of:
    * - the private key (32 bytes) and message (32 bytes), see RFC 6979 3.2d.
    * - optionally 32 extra bytes of data, see RFC 6979 3.6 Additional Data.
    * - optionally 16 extra bytes with the algorithm name.
    * Because the arguments have distinct fixed lengths it is not possible for
    *  different argument mixtures to emulate each other and result in the same
    *  nonces.
    */
   buffer_append(keydata, &offset, key32, 32);
   buffer_append(keydata, &offset, msg32, 32);
   if (data != NULL) {
       buffer_append(keydata, &offset, data, 32);
   }
   if (algo16 != NULL) {
       buffer_append(keydata, &offset, algo16, 16);
   }
   secp256k1_rfc6979_hmac_sha256_initialize(&rng, keydata, offset);
   memset(keydata, 0, sizeof(keydata));
   for (i = 0; i <= counter; i++) {
       secp256k1_rfc6979_hmac_sha256_generate(&rng, nonce32, 32);
   }
   secp256k1_rfc6979_hmac_sha256_finalize(&rng);
   return 1;
}

コード例 #2

ファイル: secp256k1.c プロジェクト: aussiehash/supervanitygen

static int nonce_function_rfc6979(unsigned char *nonce32, const unsigned char *msg32, const unsigned char *key32, const unsigned char *algo16, void *data, unsigned int counter) {
   unsigned char keydata[112];
   int keylen = 64;
   secp256k1_rfc6979_hmac_sha256_t rng;
   unsigned int i;
   /* We feed a byte array to the PRNG as input, consisting of:
    * - the private key (32 bytes) and message (32 bytes), see RFC 6979 3.2d.
    * - optionally 32 extra bytes of data, see RFC 6979 3.6 Additional Data.
    * - optionally 16 extra bytes with the algorithm name (the extra data bytes
    *   are set to zeroes when not present, while the algorithm name is).
    */
   memcpy(keydata, key32, 32);
   memcpy(keydata + 32, msg32, 32);
   if (data != NULL) {
       memcpy(keydata + 64, data, 32);
       keylen = 96;
   }
   if (algo16 != NULL) {
       memset(keydata + keylen, 0, 96 - keylen);
       memcpy(keydata + 96, algo16, 16);
       keylen = 112;
   }
   secp256k1_rfc6979_hmac_sha256_initialize(&rng, keydata, keylen);
   memset(keydata, 0, sizeof(keydata));
   for (i = 0; i <= counter; i++) {
       secp256k1_rfc6979_hmac_sha256_generate(&rng, nonce32, 32);
   }
   secp256k1_rfc6979_hmac_sha256_finalize(&rng);
   return 1;
}

コード例 #3

ファイル: bench_internal.c プロジェクト: stealthylabs/secp256k1

void bench_rfc6979_hmac_sha256(void* arg) {
    int i;
    bench_inv_t *data = (bench_inv_t*)arg;
    secp256k1_rfc6979_hmac_sha256_t rng;

    for (i = 0; i < 20000; i++) {
        secp256k1_rfc6979_hmac_sha256_initialize(&rng, data->data, 64);
        secp256k1_rfc6979_hmac_sha256_generate(&rng, data->data, 32);
    }
}

コード例 #4

ファイル: secp256k1.c プロジェクト: TheAltcoinBoard/XAB

static int nonce_function_rfc6979(unsigned char *nonce32, const unsigned char *msg32, const unsigned char *key32, unsigned int counter, const void *data) {
   secp256k1_rfc6979_hmac_sha256_t rng;
   unsigned int i;
   secp256k1_rfc6979_hmac_sha256_initialize(&rng, key32, 32, msg32, 32, (const unsigned char*)data, data != NULL ? 32 : 0);
   for (i = 0; i <= counter; i++) {
       secp256k1_rfc6979_hmac_sha256_generate(&rng, nonce32, 32);
   }
   secp256k1_rfc6979_hmac_sha256_finalize(&rng);
   return 1;
}