frost/secp256k1-zkp
3
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Use rfc6979 as default nonce generation function

Browse Source
This commit is contained in:
Pieter Wuille
2014-12-13 18:06:33 +01:00
parent b37fbc280e
commit bbd5ba7cfa
6 changed files with 38 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
src/secp256k1.c
View File

@@ -70,13 +70,29 @@ end:
return ret;
}
static int nonce_function_rfc6979(unsigned char *nonce32, const unsigned char *msg32, const unsigned char *key32, unsigned int counter, const void *data) {
(void)data;
secp256k1_rfc6979_hmac_sha256_t rng;
secp256k1_rfc6979_hmac_sha256_initialize(&rng, key32, 32, msg32, 32);
for (unsigned int i = 0; i <= counter; i++) {
secp256k1_rfc6979_hmac_sha256_generate(&rng, nonce32, 32);
}
secp256k1_rfc6979_hmac_sha256_finalize(&rng);
return 1;
}
const secp256k1_nonce_function_t secp256k1_nonce_function_rfc6979 = nonce_function_rfc6979;
const secp256k1_nonce_function_t secp256k1_nonce_function_default = nonce_function_rfc6979;
int secp256k1_ecdsa_sign(const unsigned char *msg32, unsigned char *signature, int *signaturelen, const unsigned char *seckey, secp256k1_nonce_function_t noncefp, const void* noncedata) {
DEBUG_CHECK(secp256k1_ecmult_gen_consts != NULL);
DEBUG_CHECK(msg32 != NULL);
DEBUG_CHECK(signature != NULL);
DEBUG_CHECK(signaturelen != NULL);
DEBUG_CHECK(seckey != NULL);
DEBUG_CHECK(noncefp != NULL);
if (noncefp == NULL) {
noncefp = secp256k1_nonce_function_default;
}
secp256k1_scalar_t sec, non, msg;
secp256k1_scalar_set_b32(&sec, seckey, NULL);
@@ -114,7 +130,9 @@ int secp256k1_ecdsa_sign_compact(const unsigned char *msg32, unsigned char *sig6
DEBUG_CHECK(msg32 != NULL);
DEBUG_CHECK(sig64 != NULL);
DEBUG_CHECK(seckey != NULL);
DEBUG_CHECK(noncefp != NULL);
if (noncefp == NULL) {
noncefp = secp256k1_nonce_function_default;
}
secp256k1_scalar_t sec, non, msg;
secp256k1_scalar_set_b32(&sec, seckey, NULL);