public static byte[] SignMemeData(byte[] input, MemeKeyIndex keyIndex = MemeKeyIndex.PokedexAndSaveFile)
{
// Validate Input
if (input.Length < 0x60)
{
throw new ArgumentException("Cannot memesign a buffer less than 0x60 bytes in size!");
}
var memekey = new MemeKey(keyIndex);
if (!memekey.CanResign)
{
throw new ArgumentException("Cannot sign with the specified memekey!");
}
var output = (byte[])input.Clone();
// Copy in the SHA1 signature
using (var sha1 = SHA1.Create())
{
Array.Copy(sha1.ComputeHash(input, 0, input.Length - 8), 0, output, output.Length - 8, 8);
}
// Perform AES operations
output = memekey.AesEncrypt(output);
var sigBuffer = new byte[0x60];
Array.Copy(output, output.Length - 0x60, sigBuffer, 0, 0x60);
sigBuffer[0] &= 0x7F;
sigBuffer = memekey.RsaPrivate(sigBuffer);
sigBuffer.CopyTo(output, output.Length - 0x60);
return(output);
}
