Java加密C#解密 DES算法

Java加密算法：

	public static String encrypt(String value) {
		String result = "";
		try {
			value = java.net.URLEncoder.encode(value, "utf-8");
			result = toHexString(encrypt(value, PASSWORD_CRYPT_KEY)).toUpperCase();
		} catch (Exception ex) {
			ex.printStackTrace();
			return "";
		}
		return result;
	}


	public static String toHexString(byte b[]) {
		StringBuffer hexString = new StringBuffer();
		for (int i = 0; i < b.length; i++) {
			String plainText = Integer.toHexString(0xff & b[i]);
			if (plainText.length() < 2)
				plainText = "0" + plainText;
			hexString.append(plainText);
		}
		return hexString.toString();
	}

	public static byte[] encrypt(String message, String key) throws Exception {
		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
		DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("ASCII"));
		SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
		SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
		IvParameterSpec iv = new IvParameterSpec(key.getBytes("ASCII"));
		cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
		return cipher.doFinal(message.getBytes("UTF-8"));
	}

 

C#解密代码：

  // str 待解密的密文字符串
        // key 密钥
        //解密后明文字符串
        public static string Decode(string str, string key)
        {
            try
            {
                DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
                provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));
                provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));
                byte[] buffer = new byte[str.Length / 2];
                for (int i = 0; i < (str.Length / 2); i++)
                {
                    int num2 = Convert.ToInt32(str.Substring(i * 2, 2), 0x10);
                    buffer[i] = (byte)num2;
                }
                MemoryStream stream = new MemoryStream();
                CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);
                stream2.Write(buffer, 0, buffer.Length);
                stream2.FlushFinalBlock();
                stream.Close();
                return  System.Web.HttpUtility.UrlDecode(Encoding.GetEncoding("UTF-8").GetString(stream.ToArray()));
            }
            catch (Exception) { return "解密失败……"; }
        }