sm2

Documentation

Index

• func P256() elliptic.Curve
• 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 Crypter
  • func (this *Crypter) DoubleSha256(data []byte) []byte
  • func (this *Crypter) GenerateKey() (crypter.IPrivateKey, crypter.IPublicKey, error)
  • func (this *Crypter) Name() string
  • func (this *Crypter) Sign(privateKey crypter.IPrivateKey, message []byte) ([]byte, error)
  • func (this *Crypter) ToPrivateKey(data []byte) crypter.IPrivateKey
  • func (this *Crypter) ToPublicKey(data []byte) crypter.IPublicKey
  • func (this *Crypter) Verify(publicKey crypter.IPublicKey, message, sig []byte) bool
• type PrivateKey
  • func GenerateKey(c elliptic.Curve, rand io.Reader) (*PrivateKey, error)
  • func (priv *PrivateKey) Bytes() []byte
  • func (priv *PrivateKey) Public() crypter.IPublicKey
  • func (priv *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ([]byte, error)
• type PublicKey
  • func (pub *PublicKey) Bytes() []byte

Functions

func P256

func P256() elliptic.Curve

Curve returns an instance of the sm2 curve

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.

Types

type Crypter

type Crypter struct {
}

func (*Crypter) DoubleSha256

func (this *Crypter) DoubleSha256(data []byte) []byte

func (*Crypter) GenerateKey

func (this *Crypter) GenerateKey() (crypter.IPrivateKey, crypter.IPublicKey, error)

func (*Crypter) Name

func (this *Crypter) Name() string

func (*Crypter) Sign

func (this *Crypter) Sign(privateKey crypter.IPrivateKey, message []byte) ([]byte, error)

func (*Crypter) ToPrivateKey

func (this *Crypter) ToPrivateKey(data []byte) crypter.IPrivateKey

func (*Crypter) ToPublicKey

func (this *Crypter) ToPublicKey(data []byte) crypter.IPublicKey

func (*Crypter) Verify

func (this *Crypter) Verify(publicKey crypter.IPublicKey, message, sig []byte) bool

type PrivateKey

type PrivateKey struct {
	PublicKey
	D *big.Int
}

PrivateKey represents a SM2 private key.

func GenerateKey

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

GenerateKey generates a public and private key pair.

func (*PrivateKey) Bytes

func (priv *PrivateKey) Bytes() []byte

func (*PrivateKey) Public

func (priv *PrivateKey) Public() crypter.IPublicKey

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

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

PublicKey represents an SM2 public key.

func (*PublicKey) Bytes

func (pub *PublicKey) Bytes() []byte