sm4

Documentation

Index

• Constants
• func GCMDecrypt(K, IV, C, A []byte) (P, _T []byte)
• func GCMEncrypt(K, IV, P, A []byte) (C, T []byte)
• func GHASH(H []byte, A []byte, C []byte) (X []byte)
• func GetH(key []byte) (H []byte)
• func GetY0(H, IV []byte) []byte
• func MSB(len int, S []byte) (out []byte)
• func NewCipher(key []byte) (cipher.Block, error)
• func PKCS7Padding(src []byte) []byte
• func PKCS7UnPadding(src []byte) []byte
• func Rightshift(V []byte)
• func Sm4GCM(key []byte, IV, in, A []byte, mode bool) ([]byte, []byte, error)
• func WriteKeyToPem(key SM4Key, pwd []byte) ([]byte, error)
• func WriteKeyToPemFile(FileName string, key SM4Key, pwd []byte) error
• type SM4Key
  • func ReadKeyFromPem(data []byte, pwd []byte) (SM4Key, error)
  • func ReadKeyFromPemFile(FileName string, pwd []byte) (SM4Key, error)
• type Sm4Cipher
  • func (c *Sm4Cipher) BlockSize() int
  • func (c *Sm4Cipher) Decrypt(dst, src []byte)
  • func (c *Sm4Cipher) Encrypt(dst, src []byte)

Constants

const BlockSize = 16

Functions

func GCMDecrypt

func GCMDecrypt(K, IV, C, A []byte) (P, _T []byte)

func GCMEncrypt

func GCMEncrypt(K, IV, P, A []byte) (C, T []byte)

GCMEncrypt 可鉴别加密函数 (GCM-AE(k)) K: 对称密钥 IV: IV向量 P: 明文 A: 附加的鉴别数据

return: 密文, 鉴别标签

func GHASH

func GHASH(H []byte, A []byte, C []byte) (X []byte)

func GetH

func GetH(key []byte) (H []byte)

GetH 对“0”分组的加密得到 GHASH泛杂凑函数的子密钥 key: 对称密钥 return: GHASH泛杂凑函数的子密钥

func GetY0

func GetY0(H, IV []byte) []byte

GetY0 生成初始的计数器时钟J0

H: GHASH自密钥 IV: IV向量 return: 初始的计数器时钟(J0)

func MSB

func MSB(len int, S []byte) (out []byte)

func NewCipher

func NewCipher(key []byte) (cipher.Block, error)

NewCipher creates and returns a new cipher.Block.

func PKCS7Padding

func PKCS7Padding(src []byte) []byte

func PKCS7UnPadding

func PKCS7UnPadding(src []byte) []byte

func Rightshift

func Rightshift(V []byte)

func Sm4GCM

func Sm4GCM(key []byte, IV, in, A []byte, mode bool) ([]byte, []byte, error)

Sm4GCM SM4 GCM 加解密模式 Paper: The Galois/Counter Mode of Operation (GCM) David A. Mcgrew，John Viega .2004. key: 对称加密密钥 IV: IV向量 in: A: 附加的可鉴别数据(ADD) mode: true - 加密; false - 解密验证

return: 密文C, 鉴别标签T, 错误

func WriteKeyToPem

func WriteKeyToPem(key SM4Key, pwd []byte) ([]byte, error)

WriteKeyToPem will convert SM4Key to PEM format data and return it.

func WriteKeyToPemFile

func WriteKeyToPemFile(FileName string, key SM4Key, pwd []byte) error

WriteKeyToPemFile will convert SM4Key to PEM format data, then write it into the input filename.

Types

type SM4Key

type SM4Key []byte

func ReadKeyFromPem

func ReadKeyFromPem(data []byte, pwd []byte) (SM4Key, error)

ReadKeyFromPem will return SM4Key from PEM format data.

func ReadKeyFromPemFile

func ReadKeyFromPemFile(FileName string, pwd []byte) (SM4Key, error)

ReadKeyFromPemFile will return SM4Key from filename that saved PEM format data.

type Sm4Cipher

type Sm4Cipher struct {
	// contains filtered or unexported fields
}

Cipher is an instance of SM4 encryption.

func (*Sm4Cipher) BlockSize

func (c *Sm4Cipher) BlockSize() int

func (*Sm4Cipher) Decrypt

func (c *Sm4Cipher) Decrypt(dst, src []byte)

func (*Sm4Cipher) Encrypt

func (c *Sm4Cipher) Encrypt(dst, src []byte)