C# 加密 java解密 (DES)

C#中对数据进行加密,java对加密后的数据解密。

 

c# 加密

        const string KEY_64 = "flxmtdes";
        const string IV_64 = "flxmtIvS";

        public Security()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }

        public static string Encode(string data)
        {
            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);

            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
            int i = cryptoProvider.KeySize;
            MemoryStream ms = new MemoryStream();
            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);

            StreamWriter sw = new StreamWriter(cst);
            sw.Write(data);
            sw.Flush();
            cst.FlushFinalBlock();
            sw.Flush();
            return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
        }

 

  java 解密

 

/**
	 * 解密
	 * 
	 * @param src 数据源
	 * @param key 密钥，长度必须是8的倍数
	 * @return 返回解密后的原始数据
	 * @throws Exception
	 */
	public String decrypt(String message) throws Exception {
		BASE64Decoder decoder = new BASE64Decoder();
		byte[] bytesrc = decoder.decodeBuffer(message);
		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); 
		DESKeySpec desKeySpec = new DESKeySpec(PASSWORD_CRYPT_KEY.getBytes("UTF-8"));
		SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
		SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
		IvParameterSpec iv = new IvParameterSpec(IV.getBytes("UTF-8"));
		 
        cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);   
   
        byte[] retByte = cipher.doFinal(bytesrc);  
        return new String(retByte);
		
	}

 

 

评论

2 楼 rustlingwind 2010-03-12  

你好，我试了一下你的代码。发现8位的密钥是没问题的。
但如果我把des的密钥设成32位，java可以正常加密，c#就报异常了，该如何解决？

1 楼 fxdfxd 2008-09-03  

对中文加密解密不行啊