diff options
Diffstat (limited to 'src/crypto/dsa/dsa.go')
| -rw-r--r-- | src/crypto/dsa/dsa.go | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/crypto/dsa/dsa.go b/src/crypto/dsa/dsa.go index b7565a61b0..0ecb24ab22 100644 --- a/src/crypto/dsa/dsa.go +++ b/src/crypto/dsa/dsa.go @@ -249,6 +249,10 @@ func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err err func Verify(pub *PublicKey, hash []byte, r, s *big.Int) bool { // FIPS 186-3, section 4.7 + if pub.P.Sign() == 0 { + return false + } + if r.Sign() < 1 || r.Cmp(pub.Q) >= 0 { return false } |