static void Main(string[] args)
{
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine("GGXrdRevelator v0.2 by gdkchan/Labryz");
Console.ResetColor();
Console.WriteLine("Guilty Gear XRD -REVELATOR- UPK/Steam AH3 PAC decrypter");
Console.WriteLine(string.Empty);
uint OutVal = 0;
bool encrypt = false;
if (args.Length > 0)
{
encrypt = args[0].Equals("-e");
if (!encrypt)
{
switch (args[0].ToLower())
{
case "-revel": OutVal = 0x72642a6f; break;
case "-sign": OutVal = 0x43415046; break;
}
}
else
{
switch (args[1].ToLower())
{
case "-revel": OutVal = 0x72642a6f; break;
case "-sign": OutVal = 0x43415046; break;
}
}
}
if (args.Length < 2 || OutVal == 0)
{
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine("Usage:");
Console.ResetColor();
Console.WriteLine("GGXrdRevelator [-e] (-revel|-sign) infile");
Console.WriteLine("-revel Decrypts GG Xrd REVELATOR files");
Console.WriteLine("-sign Decrypts GG Xrd SIGN files");
Console.WriteLine("-e, when added, encrypts the input file. Otherwise, the program decrypts the file.");
Console.WriteLine(string.Empty);
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine("Examples:");
Console.ResetColor();
Console.WriteLine("GGXrdRevelator -revel ELP_VOICE_JPN_A_SF.upk");
Console.WriteLine("GGXrdRevelator -e -sign chara_split_28.pac");
Console.WriteLine(string.Empty);
Console.WriteLine("The output file name is the input name with .dec or .enc extension\ndepending on if you used the -e flag.");
return;
}
string FileName = encrypt ? args[2] : args[1];
string Name = Path.GetFileName(FileName).ToUpper();
if (Name.EndsWith(".dec") || Name.EndsWith(".enc"))
{
Name = Name.Substring(0, Name.Length - 4);
}
uint Seed = 0;
foreach (char Chr in Name)
{
Seed *= 137;
Seed += Chr;
}
MersenneTwister MT = new MersenneTwister(Seed);
using (FileStream Input = new FileStream(FileName, FileMode.Open))
{
string ext = encrypt ? ".enc" : ".dec";
using (FileStream Output = new FileStream(FileName + ext, FileMode.Create))
{
BinaryReader Reader = new BinaryReader(Input);
BinaryWriter Writer = new BinaryWriter(Output);
if (!encrypt)
{
while (Input.Position + 4 <= Input.Length)
{
Writer.Write(OutVal ^= Reader.ReadUInt32() ^ MT.GenRandomNumber());
}
}
else
{
uint OldOut = OutVal;
while (Input.Position + 4 <= Input.Length)
{
uint NewOut = Reader.ReadUInt32();
Writer.Write(OldOut ^ NewOut ^ MT.GenRandomNumber());
OldOut = NewOut;
}
}
}
}
Console.WriteLine("Finished!");
}