sm2

Documentation

Overview

Package elliptic implements several standard elliptic curves over prime fields.

Package sm2 implements china crypto standards.

Index

• Variables
• func AffineToP256Point(x, y *big.Int) (out p256Point)
• func Decrypt(c []byte, key *PrivateKey) ([]byte, error)
• func DecryptAsn1(priv *PrivateKey, cipher []byte) (plaintext []byte, err error)
• func Encrypt(rand io.Reader, key *PublicKey, msg []byte) (cipher []byte, err error)
• func EncryptAsn1(rand io.Reader, key *PublicKey, msg []byte) (cipher []byte, err error)
• func Hexprint(in []byte)
• func P256() elliptic.Curve
• func Sign(rand io.Reader, priv *PrivateKey, msg []byte) (r, s *big.Int, err error)
• func SignWithDigest(rand io.Reader, priv *PrivateKey, digest []byte) (r, s *big.Int, err error)
• func Sm2KeyGen(rand io.Reader) (sk, pk []byte, err error)
• func Sm2Sign(sk, pk, msg []byte) ([]byte, error)
• func Sm2Verify(sign, pk, msg []byte) bool
• func Uint64ToAffine(in []uint64) (x, y *big.Int)
• func Verify(pub *PublicKey, msg []byte, r, s *big.Int) bool
• func VerifyWithDigest(pub *PublicKey, digest []byte, r, s *big.Int) bool
• type PrivateKey
  • func GenerateKey(rand io.Reader) (*PrivateKey, error)
  • func (key *PrivateKey) Decrypt(rand io.Reader, msg []byte, opts crypto.DecrypterOpts) (plaintext []byte, err error)
  • func (priv *PrivateKey) Public() crypto.PublicKey
  • func (priv *PrivateKey) Sign(rand io.Reader, msg []byte, opt crypto.SignerOpts) ([]byte, error)
• type PublicKey
  • func (pub *PublicKey) Verify(msg []byte, sign []byte) bool
• type Sm2PrivateKey
• type Sm2PublicKey

Variables

var DecryptionErr = errors.New("sm2: decryption error")

var EncryptionErr = errors.New("sm2: encryption error")

var (
	SM2PARAM_A []byte
)

Functions

func AffineToP256Point

func AffineToP256Point(x, y *big.Int) (out p256Point)

func Decrypt

func Decrypt(c []byte, key *PrivateKey) ([]byte, error)

func DecryptAsn1

func DecryptAsn1(priv *PrivateKey, cipher []byte) (plaintext []byte, err error)

func Encrypt

func Encrypt(rand io.Reader, key *PublicKey, msg []byte) (cipher []byte, err error)

func EncryptAsn1

func EncryptAsn1(rand io.Reader, key *PublicKey, msg []byte) (cipher []byte, err error)

func Hexprint

func Hexprint(in []byte)

func P256

func P256() elliptic.Curve

P256 returns a Curve which implements sm2 curve.

The cryptographic operations are implemented using constant-time algorithms.

func Sign

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

func SignWithDigest

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

func Sm2KeyGen

func Sm2KeyGen(rand io.Reader) (sk, pk []byte, err error)

func Sm2Sign

func Sm2Sign(sk, pk, msg []byte) ([]byte, error)

func Sm2Verify

func Sm2Verify(sign, pk, msg []byte) bool

func Uint64ToAffine

func Uint64ToAffine(in []uint64) (x, y *big.Int)

func Verify

func Verify(pub *PublicKey, msg []byte, r, s *big.Int) bool

func VerifyWithDigest

func VerifyWithDigest(pub *PublicKey, digest []byte, r, s *big.Int) bool

Types

type PrivateKey

type PrivateKey struct {
	PublicKey
	D    *big.Int
	DInv *big.Int //(1+d)^-1
}

func GenerateKey

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

func (*PrivateKey) Decrypt

func (key *PrivateKey) Decrypt(rand io.Reader, msg []byte, opts crypto.DecrypterOpts) (plaintext []byte, err error)

func (*PrivateKey) Public

func (priv *PrivateKey) Public() crypto.PublicKey

The SM2's private key contains the public key

func (*PrivateKey) Sign

func (priv *PrivateKey) Sign(rand io.Reader, msg []byte, opt crypto.SignerOpts) ([]byte, error)

type PublicKey

type PublicKey struct {
	elliptic.Curve
	X, Y        *big.Int
	PreComputed *[37][64 * 8]uint64 //precomputation
}

func (*PublicKey) Verify

func (pub *PublicKey) Verify(msg []byte, sign []byte) bool

type Sm2PrivateKey

type Sm2PrivateKey struct {
	D *big.Int //sk
}

type Sm2PublicKey

type Sm2PublicKey struct {
	X *big.Int //pk.X
	Y *big.Int //pk.Y
}