C# DESede/CBC/PKCS5Padding

Java版

 public static void main(String[] args) throws Exception {
        byte[] text = "test".getBytes(); //待加/解密的數據
//密鑰數據
        byte[] keyData = Base64.decode("Uqt3frmnmVQQgU7S4wUJnKBrQ0CypPii");
        String algorithm = "DESede"; //算法名稱
        String fullAlg = algorithm + "/CBC/PKCS5Padding";

        Cipher cipher1 = null;
        try {
            cipher1 = Cipher.getInstance(fullAlg);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        }
        int blockSize = cipher1.getBlockSize();
        byte[] iv = new byte[blockSize];
        for (int i = 0; i < blockSize; ++i) {
            iv[i] = 0;
        }
        System.out.println("iv==>"+new String(iv)+"<==");

        Cipher cipher = Cipher.getInstance(fullAlg);

        SecretKey secretKey = new SecretKeySpec(keyData, algorithm);
        IvParameterSpec ivSpec = new IvParameterSpec(iv);
/**加密*/

        cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);

        byte[] cipherBytes = cipher.doFinal(text);
        String cipherString = Base64.encode(cipherBytes);
        System.out.println("加密後==>" + cipherString);

/**解密*/
        cipher.init(Cipher.DECRYPT_MODE, secretKey, ivSpec);
        byte[] resultBytes = cipher.doFinal(Base64.decode(cipherString));
        System.out.println("解密==>" + new String(resultBytes));
    }

C#版

 /// <summary>
        /// 3des加密IV
        /// </summary>
        private static readonly byte[] TripleDesIV = { 0, 0, 0, 0, 0, 0, 0, 0 };
        /// <summary>
        /// 3DES的cbc模式加密
        /// </summary>
        /// <param name="text">待加密文本</param>
        /// <param name="key">密鑰</param>
        /// <returns></returns>
        public static string TripleDesEncryptorCBC(string text, string key)
        {
            //密鑰
            byte[] keyBytes = GetTripleDesKeyByte(key);
            //加密字符處理
            byte[] plainText = Encoding.UTF8.GetBytes(text);
            //加密
            using (var tripleDESCipher = new TripleDESCryptoServiceProvider())
            {
                tripleDESCipher.Mode = CipherMode.CBC;
                tripleDESCipher.Padding = PaddingMode.PKCS7;
                tripleDESCipher.Key = keyBytes;
                tripleDESCipher.IV = TripleDesIV;
                using (ICryptoTransform transform = tripleDESCipher.CreateEncryptor())
                {
                    return Convert.ToBase64String(transform.TransformFinalBlock(plainText, 0, plainText.Length));
                }
            }
        }

        /// <summary>
        /// 3DES的cbc模式解密
        /// </summary>
        /// <param name="text"></param>
        /// <param name="key"></param> 
        /// <returns></returns>
        public static string TripleDesDecryptorCBC(string text, string key)
        {
            //密鑰
            byte[] keyBytes = GetTripleDesKeyByte(key);
            //加密字符處理
            byte[] plainText = Convert.FromBase64String(text);
            //加密
            using (var tripleDESCipher = new TripleDESCryptoServiceProvider())
            {
                tripleDESCipher.Mode = CipherMode.CBC;
                tripleDESCipher.Padding = PaddingMode.PKCS7;
                tripleDESCipher.Key = keyBytes;
                tripleDESCipher.IV = TripleDesIV;
                using (ICryptoTransform transform = tripleDESCipher.CreateDecryptor())
                {
                    return Encoding.UTF8.GetString(transform.TransformFinalBlock(plainText, 0, plainText.Length));
                }
            }
        }

        /// <summary>
        /// 獲取密鑰數組
        /// </summary>
        /// <param name="key">密鑰</param>
        /// <returns></returns>
        public static byte[] GetTripleDesKeyByte(string key)
        {
            //密鑰處理
            byte[] pwdBytes = Convert.FromBase64String(key);
            byte[] keyBytes = new byte[24];
            int len = pwdBytes.Length;
            if (len > keyBytes.Length)
                len = keyBytes.Length;
            Array.Copy(pwdBytes, keyBytes, len);
            return keyBytes;
        }

　　效果圖：