码
//ECB加密
func EncryptDES_ECB(src, key string) string {data := []byte(src)keyByte := []byte(key)block, err := des.NewCipher(keyByte)if err != nil {panic(err)    }bs := block.BlockSize()//对明文数据进行补码data = PKCS5Padding(data, bs)if len(data)%bs != 0 {panic("Need a multiple of the blocksize")}out := make([]byte, len(data))dst := outfor len(data) > 0 {//对明文按照blocksize进行分块加密//必要时可以使用go关键字进行并行加密block.Encrypt(dst, data[:bs])data = data[bs:]dst = dst[bs:]}return fmt.Sprintf("%X", out)
}//ECB解密
func DecryptDES_ECB(src, key string) string {data, err := hex.DecodeString(src)if err != nil {panic(err)}keyByte := []byte(key)block, err := des.NewCipher(keyByte)if err != nil {panic(err)}bs := block.BlockSize()if len(data)%bs != 0 {panic("crypto/cipher: input not full blocks")}out := make([]byte, len(data))dst := outfor len(data) > 0 {block.Decrypt(dst, data[:bs])data = data[bs:]dst = dst[bs:]}out = PKCS5UnPadding(out)return string(out)
}//CBC加密
func EncryptDES_CBC(src, key string) string {data := []byte(src)keyByte := []byte(key)block, err := des.NewCipher(keyByte )if err != nil {panic(err)}data = PKCS5Padding(data , block.BlockSize())//获取CBC加密模式iv := keyByte //用密钥作为向量(不建议这样使用)mode := cipher.NewCBCEncrypter(block, iv)out := make([]byte, len(data))mode .CryptBlocks(out, data)return fmt.Sprintf("%X", out)
}//CBC解密
func DecryptDES_CBC(src, key string) string {keyByte := []byte(key)data, err := hex.DecodeString(src)if err != nil {panic(err)}block, err := des.NewCipher(keyByte)if err != nil {panic(err)}iv := keyByte //用密钥作为向量(不建议这样使用)mode := cipher.NewCBCDecrypter(block, iv)plaintext := make([]byte, len(data))mode.CryptBlocks(plaintext, data)plaintext = PKCS5UnPadding(plaintext)return string(plaintext)
}//明文补码算法
func PKCS5Padding(ciphertext []byte, blockSize int) []byte {padding := blockSize - len(ciphertext)%blockSizepadtext := bytes.Repeat([]byte{byte(padding)}, padding)return append(ciphertext, padtext...)
}
//明文减码算法
func PKCS5UnPadding(origData []byte) []byte {length := len(origData)unpadding := int(origData[length-1])return origData[:(length - unpadding)]
}