C#对接JAVA系统遇到的AES加密坑

起因对接合作伙伴的系统，需要对数据进行AES加密

默认的使用了已经写好的帮助类中加密算法，发现结果不对，各种尝试改变加密模式改变向量等等折腾快一下午。最后网上查了下AES在JAVA里面的实现完整代码如下：

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public static String AesEncrypt(String content,String encyKey) {                    try {                               KeyGenerator kgen = KeyGenerator.getInstance("AES");             SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");               secureRandom.setSeed(encyKey.getBytes());               kgen.init(128, secureRandom);             Cipher cipher=Cipher.getInstance("AES");                    cipher.init(Cipher.DECRYPT_MODE,new SecretKeySpec(kgen.generateKey().getEncoded(),"AES"));                      byte[] byteContent = content.getBytes("utf-8");             byte[] result = cipher.doFinal(byteContent);                        BASE64Encoder  encode = new BASE64Encoder ();             String strResult=encode.encode(result);             return strResult;         } catch (Exception e) {             e.printStackTrace();         }         return null;   }

 根据博主：http://www.cnblogs.com/amylis_chen/p/6107162.html#commentform  的经验有了思路

解决办法，通过JAVA代码生成AES的密钥，再通过C#代码进行AES加密

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//JAVA代码生成密钥         String encyKey="合作伙伴提供的密钥 ";         KeyGenerator kgen = KeyGenerator.getInstance("AES");         java.security.SecureRandom random = java.security.SecureRandom.getInstance("SHA1PRNG");         random.setSeed(encyKey.getBytes());         kgen.init(128, random);          SecretKey secretKey = kgen.generateKey();         byte[] enCodeFormat = secretKey.getEncoded();         BASE64Encoder coder = new BASE64Encoder();                System.out.println(coder.encode(enCodeFormat));

 

C#代码进行AES加密

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class Program    {        static void Main(string[] args)        {            //默认密钥向量            var result = AESEncode("123456", "JAVA代码输出的密钥");            Console.WriteLine(result);            Console.ReadLine();          }        public static string AESEncode(string encryptString, string encryptKey)        {            if (string.IsNullOrEmpty(encryptString)) return null;            Byte[] toEncryptArray = Encoding.UTF8.GetBytes(encryptString);            RijndaelManaged rm = new RijndaelManaged            {                Key = Convert.FromBase64String(encryptKey),                Mode = CipherMode.ECB,                Padding = PaddingMode.PKCS7            };            ICryptoTransform cTransform = rm.CreateEncryptor();            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);            return Convert.ToBase64String(resultArray, 0, resultArray.Length);        }    }