# Package ecdsa

## Overview ▹

## Index ▹

## func Sign ¶

func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err error)

Sign signs a hash (which should be the result of hashing a larger message) using the private key, priv. If the hash is longer than the bit-length of the private key's curve order, the hash will be truncated to that length. It returns the signature as a pair of integers. The security of the private key depends on the entropy of rand.

## func Verify ¶

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 ¶

PrivateKey represents a ECDSA private key.

type PrivateKey struct { PublicKey D *big.Int }

### func GenerateKey ¶

func GenerateKey(c elliptic.Curve, rand io.Reader) (*PrivateKey, 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 ¶

PublicKey represents an ECDSA public key.

type PublicKey struct { elliptic.Curve X, Y *big.Int }