Ejemplo n.º 1
0
        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);
        }
Ejemplo n.º 2
0
        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);
        }