translate donet DESCryptoServiceProvider

encrypt_decrypt.go

 /*public static string DecryptStringEx(string source)
        {
            //判断是否为空字符串
            if (string.IsNullOrEmpty(source))
            {
                //直接返回原字符串
                return source;
            }

            //获得要解密的数据
            byte[] data = Convert.FromBase64String(source);

            //创建DES算法提供者
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();

            //创建加密转换运算对象
            ICryptoTransform transform = provider.CreateDecryptor(DEFAULT_KEY, DEFAULT_IV);

            //判断数据是否满足输入数据块要求
            if (data.Length < transform.InputBlockSize)
            {
                //说明字符串没有加密，则直接返回
                return source;
            }

            //获得解密的结果
            byte[] result = transform.TransformFinalBlock(data, 0, data.Length);

            //返回解密结果
            return Encoding.UTF8.GetString(result);
        }
  */
func Decrypt(source string) string {
	data, _ := base64.StdEncoding.DecodeString(source)
	iv := []byte{0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF}
	block, err := des.NewCipher([]byte("11111111"))
	if err != nil {
		log.Fatal(err)
	}

	m := cipher.NewCBCDecrypter(block, iv)
	log.Println("the aes blocksize is", aes.BlockSize)
	data = data[:8]
	m.CryptBlocks(data, data)
	return string(data)
}
func Encrypt(source string) string {
	data := []byte(source)
	block, err := des.NewCipher([]byte("11111111"))
	if err != nil {
		log.Fatal(err)
	}
	iv := []byte{0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF}
	m := cipher.NewCBCEncrypter(block, iv)
	data = data[:8]
	m.CryptBlocks(data, data)

	str := base64.StdEncoding.EncodeToString(data)
	return str
}