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：

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

//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

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);
       }
   }