C#對接JAVA系統遇到的AES加密坑

起因對接合作伙伴的系統，需要對數據進行AES加密

默認的使用了已經寫好的幫助類中加密算法，發現結果不對，各種嘗試改變加密模式改變向量等等折騰快一下午。最后網上查了下AES在JAVA里面的實現完整代碼如下：

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;
  }

 根據博主：http://www.cnblogs.com/amylis_chen/p/6107162.html#commentform  的經驗有了思路

解決辦法，通過JAVA代碼生成AES的密鑰，再通過C#代碼進行AES加密

//JAVA代碼生成密鑰
		String encyKey="合作伙伴提供的密鑰 ";
		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#代碼進行AES加密

 class Program
    {
        static void Main(string[] args)
        {
            //默認密鑰向量
            var result = AESEncode("123456", "JAVA代碼輸出的密鑰");
            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);
        }
    }

 

其他解決辦法：讓對方提供一個大包的dll進行調用