diff options
Diffstat (limited to 'src/crypto/rsa/rsa.go')
| -rw-r--r-- | src/crypto/rsa/rsa.go | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/crypto/rsa/rsa.go b/src/crypto/rsa/rsa.go index ee022b803a..0f487fe152 100644 --- a/src/crypto/rsa/rsa.go +++ b/src/crypto/rsa/rsa.go @@ -465,6 +465,9 @@ func decrypt(random io.Reader, priv *PrivateKey, c *big.Int) (m *big.Int, err er err = ErrDecryption return } + if priv.N.Sign() == 0 { + return nil, ErrDecryption + } var ir *big.Int if random != nil { @@ -490,7 +493,7 @@ func decrypt(random io.Reader, priv *PrivateKey, c *big.Int) (m *big.Int, err er } } bigE := big.NewInt(int64(priv.E)) - rpowe := new(big.Int).Exp(r, bigE, priv.N) + rpowe := new(big.Int).Exp(r, bigE, priv.N) // N != 0 cCopy := new(big.Int).Set(c) cCopy.Mul(cCopy, rpowe) cCopy.Mod(cCopy, priv.N) |