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Differential D786 Diff 2050 src/secp256k1/src/secp256k1.c

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src/secp256k1/src/secp256k1.c

Show First 20 Lines • Show All 304 Lines • ▼ Show 20 Linesint secp256k1_ecdsa_verify(const secp256k1_context* ctx, const secp256k1_ecdsa_signature *sig, const unsigned char *msg32, const secp256k1_pubkey *pubkey) {
return (!secp256k1_scalar_is_high(&s) && return (!secp256k1_scalar_is_high(&s) &&
secp256k1_pubkey_load(ctx, &q, pubkey) && secp256k1_pubkey_load(ctx, &q, pubkey) &&
secp256k1_ecdsa_sig_verify(&ctx->ecmult_ctx, &r, &s, &q, &m)); secp256k1_ecdsa_sig_verify(&ctx->ecmult_ctx, &r, &s, &q, &m));
} }
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) { 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 char keydata[112];
int keylen = 64; int keylen = 64;
secp256k1_rfc6979_hmac_sha256_t rng; secp256k1_rfc6979_hmac_sha256 rng;
unsigned int i; unsigned int i;
/* We feed a byte array to the PRNG as input, consisting of: /* 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. * - 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 32 extra bytes of data, see RFC 6979 3.6 Additional Data.
* - optionally 16 extra bytes with the algorithm name. * - optionally 16 extra bytes with the algorithm name.
* Because the arguments have distinct fixed lengths it is not possible for * Because the arguments have distinct fixed lengths it is not possible for
* different argument mixtures to emulate each other and result in the same * different argument mixtures to emulate each other and result in the same
* nonces. * nonces.
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