Inheritance: IPrefetch
Example #1
0
        public static IPrefetch Open(Stream stream, string file)
        {
            IPrefetch pf = null;

            var rawBytes = new byte[stream.Length];

            stream.Read(rawBytes, (int)0, (int)(rawBytes.Length));

            var tempSig = Encoding.ASCII.GetString(rawBytes, 0, 3);

            if (tempSig.Equals("MAM"))
            {
                //windows 10, so we need to decompress

                //Size of decompressed data is at offset 4
                var size = BitConverter.ToUInt32(rawBytes, 4);

                //get our compressed bytes (skipping signature and uncompressed size)
                var compressedBytes = rawBytes.Skip(8).ToArray();
                var decom           = Xpress2.Decompress(compressedBytes, size);

                //update rawBytes with decompressed bytes so the rest works
                rawBytes = decom;
            }

            //at this point we have prefetch bytes we can process

            var fileVer = (Version)BitConverter.ToInt32(rawBytes, 0);

            var sig = BitConverter.ToInt32(rawBytes, 4);

            if (sig != Signature)
            {
                throw new Exception("Invalid signature! Should be 'SCCA'");
            }

            switch (fileVer)
            {
            case Version.WinXpOrWin2K3:
                pf = new Version17(rawBytes, file);
                break;

            case Version.VistaOrWin7:
                pf = new Version23(rawBytes, file);
                break;

            case Version.Win8xOrWin2012x:
                pf = new Version26(rawBytes, file);
                break;

            case Version.Win10:
                pf = new Version30(rawBytes, file);
                break;

            default:
                throw new Exception($"Unknown version '{fileVer:X}'");
            }

            return(pf);
        }
Example #2
0
        public static IPrefetch Open(string file)
        {
            IPrefetch pf = null;

            var rawBytes = File.ReadAllBytes(file);

            var tempSig = Encoding.ASCII.GetString(rawBytes, 0, 3);

            if (tempSig.Equals("MAM"))
            {
                //windows 10, so we need to decompress

                //Size of decompressed data is at offset 4
                var size = BitConverter.ToUInt32(rawBytes, 4);

                //get our compressed bytes (skipping signature and uncompressed size)
                var compressedBytes = rawBytes.Skip(8).ToArray();
                var decom = Xpress2.Decompress(compressedBytes, size);

                //update rawBytes with decompressed bytes so the rest works
                rawBytes = decom;
            }

            //at this point we have prefetch bytes we can process

            var fileVer = (Version) BitConverter.ToInt32(rawBytes, 0);

            var sig = BitConverter.ToInt32(rawBytes, 4);

            if (sig != Signature)
            {
                throw new Exception("Invalid signature! Should be 'SCCA'");
            }

            switch (fileVer)
            {
                case Version.WinXpOrWin2K3:
                    pf = new Version17(rawBytes, file);
                    break;
                case Version.VistaOrWin7:
                    pf = new Version23(rawBytes, file);
                    break;
                case Version.Win8xOrWin2012x:
                    pf = new Version26(rawBytes, file);
                    break;
                case Version.Win10:
                    pf = new Version30(rawBytes, file);
                    break;
                default:
                    throw new Exception($"Unknown version '{fileVer:X}'");
            }


            return pf;
        }