diff options
Diffstat (limited to 'src/pubkey/ecdsa/ecdsa.cpp')
| -rw-r--r-- | src/pubkey/ecdsa/ecdsa.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/pubkey/ecdsa/ecdsa.cpp b/src/pubkey/ecdsa/ecdsa.cpp index 9a3510c33..5c45c5ed3 100644 --- a/src/pubkey/ecdsa/ecdsa.cpp +++ b/src/pubkey/ecdsa/ecdsa.cpp @@ -80,12 +80,13 @@ bool ECDSA_Verification_Operation::verify(const byte msg[], size_t msg_len, BigInt r(sig, sig_len / 2); BigInt s(sig + sig_len / 2, sig_len / 2); - if(r < 0 || r >= order || s < 0 || s >= order) + if(r <= 0 || r >= order || s <= 0 || s >= order) return false; BigInt w = inverse_mod(s, order); - PointGFp R = w * (e * base_point + r * public_point); + PointGFp R = w * multi_exponentiate(base_point, e, + public_point, r); if(R.is_zero()) return false; |