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author | Filippo Valsorda <filippo@golang.org> | 2019-06-27 18:48:02 -0400 |
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committer | Filippo Valsorda <filippo@golang.org> | 2019-06-27 18:48:02 -0400 |
commit | 98188f3001e7216f61098958e64ded2e95e7be27 (patch) | |
tree | 9f39ff6d1818cf0bd3f950c05255b56f2d6cd679 /src/crypto/ecdsa/ecdsa.go | |
parent | 5c354e66d175094e5a3007d0133d82d3f21c9d03 (diff) | |
parent | 0b3a57b5374bba3fdf88258e2be4c8be65e6a5de (diff) | |
download | go-98188f3001e7216f61098958e64ded2e95e7be27.tar.gz go-98188f3001e7216f61098958e64ded2e95e7be27.zip |
[dev.boringcrypto] all: merge master into dev.boringcrypto
Change-Id: Ic1d89215bb3e37a722d3d3bc7698edea940a83d9
Diffstat (limited to 'src/crypto/ecdsa/ecdsa.go')
-rw-r--r-- | src/crypto/ecdsa/ecdsa.go | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/src/crypto/ecdsa/ecdsa.go b/src/crypto/ecdsa/ecdsa.go index 0e6bb8b23f..be01a29606 100644 --- a/src/crypto/ecdsa/ecdsa.go +++ b/src/crypto/ecdsa/ecdsa.go @@ -21,13 +21,12 @@ import ( "crypto/aes" "crypto/cipher" "crypto/elliptic" + "crypto/internal/randutil" "crypto/sha512" "encoding/asn1" "errors" "io" "math/big" - - "crypto/internal/randutil" ) import ( @@ -226,14 +225,21 @@ func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err err // See [NSA] 3.4.1 c := priv.PublicKey.Curve + e := hashToInt(hash, c) + r, s, err = sign(priv, &csprng, c, e) + return +} + +func signGeneric(priv *PrivateKey, csprng *cipher.StreamReader, c elliptic.Curve, e *big.Int) (r, s *big.Int, err error) { N := c.Params().N if N.Sign() == 0 { return nil, nil, errZeroParam } + var k, kInv *big.Int for { for { - k, err = randFieldElement(c, csprng) + k, err = randFieldElement(c, *csprng) if err != nil { r = nil return @@ -251,8 +257,6 @@ func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err err break } } - - e := hashToInt(hash, c) s = new(big.Int).Mul(priv.D, r) s.Add(s, e) s.Mul(s, kInv) @@ -261,7 +265,6 @@ func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err err break } } - return } @@ -288,8 +291,12 @@ func Verify(pub *PublicKey, hash []byte, r, s *big.Int) bool { return false } e := hashToInt(hash, c) + return verify(pub, c, e, r, s) +} +func verifyGeneric(pub *PublicKey, c elliptic.Curve, e, r, s *big.Int) bool { var w *big.Int + N := c.Params().N if in, ok := c.(invertible); ok { w = in.Inverse(s) } else { |