public bool CommitHeader(Keyset keyset)
{
SharedStream headerStream = SavefileSource.CreateStream();
var hashData = new byte[0x3d00];
headerStream.Position = 0x300;
headerStream.Read(hashData, 0, hashData.Length);
byte[] hash = Crypto.ComputeSha256(hashData, 0, hashData.Length);
headerStream.Position = 0x108;
headerStream.Write(hash, 0, hash.Length);
if (keyset.SaveMacKey.IsEmpty())
{
return(false);
}
var cmacData = new byte[0x200];
var cmac = new byte[0x10];
headerStream.Position = 0x100;
headerStream.Read(cmacData, 0, 0x200);
Crypto.CalculateAesCmac(keyset.SaveMacKey, cmacData, 0, cmac, 0, 0x200);
headerStream.Position = 0;
headerStream.Write(cmac, 0, 0x10);
headerStream.Flush();
return(true);
}
public bool SignHeader(Keyset keyset)
{
if (keyset.SaveMacKey.IsEmpty())
{
return(false);
}
var data = new byte[0x200];
var cmac = new byte[0x10];
SharedStream headerStream = SavefileSource.CreateStream();
headerStream.Position = 0x100;
headerStream.Read(data, 0, 0x200);
Crypto.CalculateAesCmac(keyset.SaveMacKey, data, 0, cmac, 0, 0x200);
headerStream.Position = 0;
headerStream.Write(cmac, 0, 0x10);
return(true);
}