Package ecdsa
Package ecdsa implements the Elliptic Curve Digital Signature Algorithm, as
defined in FIPS 186-3.
This implementation derives the nonce from an AES-CTR CSPRNG keyed by
ChopMD(256, SHA2-512(priv.D || entropy || hash)). The CSPRNG key is IRO by
a result of Coron; the AES-CTR stream is IRO under standard assumptions.
- func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err error)
- func Verify(pub *PublicKey, hash []byte, r, s *big.Int) bool
- type PrivateKey
- func GenerateKey(c elliptic.Curve, rand io.Reader) (priv *PrivateKey, err error)
- func (priv *PrivateKey) Public() crypto.PublicKey
- func (priv *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ([]byte, error)
- type PublicKey
Package files
ecdsa.go
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func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err error)
Sign signs an arbitrary length hash (which should be the result of hashing a
larger message) using the private key, priv. It returns the signature as a
pair of integers. The security of the private key depends on the entropy of
rand.
func Verify(pub *PublicKey, hash []byte, r, s *big.Int) bool
Verify verifies the signature in r, s of hash using the public key, pub. Its
return value records whether the signature is valid.
type PrivateKey struct {
PublicKey
D *big.Int
}
PrivateKey represents a ECDSA private key.
func GenerateKey(c elliptic.Curve, rand io.Reader) (priv *PrivateKey, err error)
GenerateKey generates a public and private key pair.
func (*PrivateKey) Public
func (priv *PrivateKey) Public() crypto.PublicKey
Public returns the public key corresponding to priv.
func (*PrivateKey) Sign
func (priv *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ([]byte, error)
Sign signs msg with priv, reading randomness from rand. This method is
intended to support keys where the private part is kept in, for example, a
hardware module. Common uses should use the Sign function in this package
directly.
type PublicKey struct {
elliptic.Curve
X, Y *big.Int
}
PublicKey represents an ECDSA public key.