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Add ability to pass extra entropy to rfc6979

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Suggested by Greg Maxwell.
This commit is contained in:
Pieter Wuille
2015-03-20 09:19:38 -07:00
parent 3087bc4d75
commit 1573a102c0
7 changed files with 25 additions and 9 deletions
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src/secp256k1.c
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@@ -66,8 +66,7 @@ int secp256k1_ecdsa_verify(const unsigned char *msg32, const unsigned char *sig,
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;
(void)data;
secp256k1_rfc6979_hmac_sha256_initialize(&rng, key32, 32, msg32, 32);
secp256k1_rfc6979_hmac_sha256_initialize(&rng, key32, 32, msg32, 32, data, data != NULL ? 32 : 0);
for (i = 0; i <= counter; i++) {
secp256k1_rfc6979_hmac_sha256_generate(&rng, nonce32, 32);
}