DES加密方法在PHP和.NET平台间的无缝连接

作者：caocao（网络隐士），http://www.caocao.name/，http://www.caocao.mobi/
转载请注明来源：http://www.iteye.com/topic/178321

有个项目要跨PHP平台和.NET平台进行数据交换，数据还必须是DES加密的，在折腾了一阵后隐士终于摸清楚代码该如何写，加密数据才能够通用于两个平台。

PHP加密方式 写道

$key="********";
$iv="********";
$message="kjsdfuihyweflgjerogjreg";
echo base64_encode(mcrypt_encrypt(MCRYPT_DES, $key, $message, MCRYPT_MODE_CBC, $iv));

C#加密解密方式 写道

        /// <summary>
        /// DES加密方法，keyBytes和ivBytes必须为64bit即8位的
        /// </summary>
        /// <param name="inBytes">待加密数组</param>
        /// <param name="keyBytes">key数组</param>
        /// <param name="ivBytes">iv数组</param>
        /// <returns>加密完的数组</returns>
        public static byte[] DESEncryptWithCBCZeros(byte[] inBytes, byte[] keyBytes, byte[] ivBytes)
        {
            using (MemoryStream memoryStream = new MemoryStream())
            {
                DES desCBC = DES.Create();
                desCBC.Mode = CipherMode.CBC;
                desCBC.Padding = PaddingMode.Zeros;
                using (CryptoStream cryptoStream = new CryptoStream(memoryStream, desCBC.CreateEncryptor(keyBytes, ivBytes), CryptoStreamMode.Write))
                {
                    cryptoStream.Write(inBytes, 0, inBytes.Length);
                    cryptoStream.FlushFinalBlock();
                    byte[] bytes = memoryStream.ToArray();
                    return bytes;
                }
            }
        }

        /// <summary>
        /// DES解密方法，keyBytes和ivBytes必须为64bit即8位的
        /// </summary>
        /// <param name="inBytes">待解密数组</param>
        /// <param name="keyBytes">key数组</param>
        /// <param name="ivBytes">iv数组</param>
        /// <returns>解密完的数组</returns>
        public static byte[] DESDecryptWithCBCZeros(byte[] inBytes, byte[] keyBytes, byte[] ivBytes)
        {
            using (MemoryStream memoryStream = new MemoryStream(inBytes))
            {
                DES desCBC = DES.Create();
                desCBC.Mode = CipherMode.CBC;
                desCBC.Padding = PaddingMode.Zeros;
                using (CryptoStream cryptoStream = new CryptoStream(memoryStream, desCBC.CreateDecryptor(keyBytes, ivBytes), CryptoStreamMode.Read))
                {
                    byte[] outEncrypt = new byte[inBytes.Length];
                    cryptoStream.Read(outEncrypt, 0, outEncrypt.Length);
                    return outEncrypt;
                }
            }
        }

C#调用方式 写道

            try
            {
                byte[] inBytes = Encoding.UTF8.GetBytes("kldfgwehfo23905hfkjvbsdcsdc");
                byte[] keyBytes = Encoding.ASCII.GetBytes("********");
                byte[] ivBytes = Encoding.ASCII.GetBytes("********");
                byte[] outBytes = StringEncryptHelper.DESEncryptWithCBCZeros(inBytes, keyBytes, ivBytes);
                Console.WriteLine(Convert.ToBase64String(outBytes));

                Console.WriteLine(Encoding.UTF8.GetString(StringEncryptHelper.DESDecryptWithCBCZeros(outBytes, keyBytes, ivBytes)));
            }
            catch (CryptographicException e)
            {
                Console.WriteLine(e.StackTrace);
                Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
            }

评论

1 楼 suntongo 2009-02-28  

直接用SSL，.net和java都完美支持，加密/解密过程完全透明，而且安全性最高。