Question

我的问题是关于C＃和Java的。

我想从以下链接解密像C＃的方法d67这样的字节数组：https://github.com/AresChat/cb0t/blob/master/cb0t/Misc/Hashlink.cs

我将其翻译为Java：

private static byte[] d67(byte[] data, int b)
    {
        byte[] buffer = new byte[data.length];
        System.arraycopy(data, 0, buffer, 0, data.length);

        for (int i = 0; i < data.length; i++)
        {
            buffer[i] = (byte)(data[i] ^ b >> 8 & 255);
            b = (b + data[i]) * 23219 + 36126 & 65535;
        }
        return buffer;
    }

但是它给我的结果与C＃方法不同。

我翻译错了什么？

我用C＃得到的结果：

public static void Main() 
        {
           string str = "F5fPxdTq8eJeuqSVejGmq7aTh6BJZ8J0jgt92MDDjxTIWf+mWa8Ld+01L2bVIV6FXhCO";
      byte[] val2 = Convert.FromBase64String(str);
      val2 = d67(val2, 28435);
      Console.WriteLine("Converted byte value: {0}", BitConverter.ToString(val2));
        }
private static byte[] d67(byte[] data, int b)
        {
            byte[] buffer = new byte[data.Length];
            Array.Copy(data, buffer, data.Length);

            for (int i = 0; i < data.Length; i++)
            {
                buffer[i] = (byte)(data[i] ^ b >> 8 & 255);
                b = (b + data[i]) * 23219 + 36126 & 65535;
            }
            return buffer;
        }

是： 78-9C-63-60-C0-04-CE-1E-8E-21-40-EC-E7-E7-EA-C3-60-A6-76-C9-DC-F0-0A-48-D4- D7-31-D2-3F-C8-35-58-C1-C5-55-C1-D8-40-C7-C4-40-C7-D4-80-81-01-00-F3-11-09- F1

我期望Java能够达到相同的结果：

public static void main(String[] args)
    {
        String encodedString = "arlnk://F5fPxdTq8eJeuqSVejGmq7aTh6BJZ8J0jgt92MDDjxTIWf+mWa8Ld+01L2bVIV6FXhCO";
        encodedString = encodedString.substring(8);
        Base64.Decoder decoder = Base64.getDecoder();
        byte[] decodedByteArray = decoder.decode(encodedString);
        decodedByteArray = d67(decodedByteArray, 28435);
        String array = "";
        for (int f=0; f<decodedByteArray.length; f++) {
            if (f == decodedByteArray.length - 1) {
                array = array + String.format("%02X", decodedByteArray[f]);
            }
            else {
                array = array + String.format("%02X", decodedByteArray[f]) + "-";
            }
        }
        System.out.print(array);
    }

    private static byte[] d67(byte[] data, int b)
    {
        byte[] buffer = new byte[data.length];
        System.arraycopy(data, 0, buffer, 0, data.length);

        for (int i = 0; i < data.length; i++)
        {
            buffer[i] = (byte)(data[i] ^ b >> 8 & 255);
            b = (b + data[i]) * 23219 + 36126 & 65535;
        }
        return buffer;
    }

Answer 1

@khelwood观测byte的类型在两种语言中都是不同的。

您可以将有符号转换为无符号。

将带符号字节转换为无符号字节后，其结果与.Net相同

    private static byte[] d67(byte[] data, int b) {
        byte[] buffer = new byte[data.length];
        System.arraycopy(data, 0, buffer, 0, data.length);

        for (int i = 0; i < data.length; i++) {
            int unsignedData = unsignedToBytes(data[i]);

            buffer[i] = (byte) (unsignedData ^ b >> 8 & 255);

            b = (b + unsignedData) * 23219 + 36126 & 65535;
        }
        return buffer;
    }

    public static int unsignedToBytes(byte b) {
        return b & 0xFF;
    }

用Java解密字节数组

1 个答案: