Exemple #1
0
        private static Modulus LoadKey(string file, ushort header, bool loadModulus, bool loadEncKey, bool loadDecKey, bool loadXOrKey)
        {
            var key = new Modulus();

            using (var f = File.OpenRead(file))
            {
                var fheader = Serializer.Deserialize <ENCDEC_FILEHEADER>(f);

                if (fheader.sFileHeader != header)
                {
                    throw new Exception("Invalid file format");
                }

                var Size = 6;
                Size += loadModulus ? 16 : 0;
                Size += loadEncKey ? 16 : 0;
                Size += loadDecKey ? 16 : 0;
                Size += loadXOrKey ? 16 : 0;

                if (fheader.Size != Size)
                {
                    throw new ArgumentException("Invalid file size");
                }

                var temp = new byte[16];

                if (loadModulus)
                {
                    f.Read(temp, 0, 16);
                    for (var i = 0; i < 4; i++)
                    {
                        key.modulus[i] = s_saveLoadXor[i] ^ BitConverter.ToUInt32(temp, i * 4);
                    }
                }

                if (loadEncKey)
                {
                    f.Read(temp, 0, 16);
                    for (var i = 0; i < 4; i++)
                    {
                        key.encryptionKey[i] = s_saveLoadXor[i] ^ BitConverter.ToUInt32(temp, i * 4);
                    }
                }

                if (loadDecKey)
                {
                    f.Read(temp, 0, 16);
                    for (var i = 0; i < 4; i++)
                    {
                        key.decryptionKey[i] = s_saveLoadXor[i] ^ BitConverter.ToUInt32(temp, i * 4);
                    }
                }

                if (loadXOrKey)
                {
                    f.Read(temp, 0, 16);
                    for (var i = 0; i < 4; i++)
                    {
                        key.xor[i] = s_saveLoadXor[i] ^ BitConverter.ToUInt32(temp, i * 4);
                    }
                }
            }

            return(key);
        }
Exemple #2
0
 public static void LoadDecryptionKey(string file)
 {
     s_dec = LoadKey(file, 4370, true, false, true, true);
 }