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@fionera
Created October 12, 2020 17:53
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Decode this stuff
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace ConsoleApp1
{
class Program
{
private byte[] bDebug = new byte[16]
{
(byte) 37,
(byte) 157,
(byte) 159,
(byte) 101,
(byte) 198,
(byte) 147,
(byte) 67,
(byte) 0,
(byte) 237,
(byte) 74,
(byte) 37,
(byte) 60,
(byte) 81,
(byte) 202,
(byte) 22,
(byte) 112
};
private static char[] cHexCodes = new char[16]
{
'0',
'1',
'2',
'3',
'4',
'5',
'6',
'7',
'8',
'9',
'A',
'B',
'C',
'D',
'E',
'F'
};
private string sTryingToLogin = "Trying to login...";
static void Main(string[] args)
{
Console.WriteLine((new Program()).sAssertAgain(args[0]));
}
public string sAssertAgain(string sData) => DecryptData(DecryptData(this.sTryingToLogin, Bin2Hex(this.bDebug)), sData);
private static byte[] GetIVector(string sPassword)
{
byte[] bytes = Encoding.Default.GetBytes(sPassword.PadLeft(8, ' '));
byte[] numArray = new byte[8];
for (int index = 0; index < 8; ++index)
numArray[index] = bytes[index];
return numArray;
}
public static string DecryptData(string sPassword, string sData)
{
byte[] bytes = Encoding.Default.GetBytes(sPassword.PadLeft(24, ' '));
byte[] ivector = GetIVector(sPassword);
byte[] buffer1 = Hex2Bin(sData);
using (TripleDESCryptoServiceProvider cryptoServiceProvider = new TripleDESCryptoServiceProvider())
{
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream((Stream)memoryStream, cryptoServiceProvider.CreateDecryptor(bytes, ivector), CryptoStreamMode.Write);
cryptoStream.Write(buffer1, 0, buffer1.Length);
cryptoStream.FlushFinalBlock();
byte[] buffer2 = memoryStream.GetBuffer();
return Encoding.Default.GetString(buffer2, 0, (int)memoryStream.Length);
}
}
public static byte Hex2Byte(string HexSource) => HexSource.Length == 2 ? (byte)Convert.ToInt32(HexSource, 16) : throw new Exception("Wrong length of HexSource=" + HexSource.Length.ToString());
public static string Hex2Str(string HexSource)
{
byte[] bytes = new byte[HexSource.Length / 2];
for (int startIndex = 0; startIndex < HexSource.Length; startIndex += 2)
{
Convert.ToInt32(HexSource.Substring(startIndex, 2), 16).ToString();
bytes[startIndex / 2] = Convert.ToByte(HexSource.Substring(startIndex, 2), 16);
}
return Encoding.Default.GetString(bytes);
}
public static byte HexChar2Int(char cChar) => cChar >= '0' && cChar <= '9' ? (byte)((uint)cChar - 48U) : (byte)(10U + (uint)(byte)((uint)cChar - 65U));
public static byte[] Hex2Bin(string HexSource)
{
byte[] numArray = new byte[HexSource.Length / 2];
for (int index = 0; index < HexSource.Length; index += 2)
{
byte num1 = HexChar2Int(HexSource[index]);
byte num2 = HexChar2Int(HexSource[index + 1]);
numArray[index / 2] = (byte)(((uint)num1 << 4) + (uint)num2);
}
return numArray;
}
public static string Bin2Hex(byte[] cString) => Bin2Hex(cString, cString.Length);
public static string Bin2Hex(byte[] cString, int iLength)
{
byte[] bytes = new byte[iLength * 2];
for (int index = 0; index < iLength; ++index)
{
byte num = cString[index];
bytes[index << 1] = (byte)cHexCodes[(int)num / 16];
bytes[(index << 1) + 1] = (byte)cHexCodes[(int)num % 16];
}
return Encoding.Default.GetString(bytes);
}
}
}
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