public static bool Decrypt(string path)
{
byte[] src = File.ReadAllBytes(path);
if (Encoding.ASCII.GetString(src, 0, 6) == "GT6TED")
{
return(false);
}
else if (src.AsSpan(0, 4).SequenceEqual(new byte[] { 0xC5, 0xEE, 0xF7, 0xFF }))
{
src = MiscUtils.Deflate(src);
File.WriteAllBytes(path, MiscUtils.Deflate(src));
return(true);
}
else
{
int j = 1;
for (int i = 0; i < src.Length; i++)
{
src[i] ^= k[j++ - 1];
if (j > k.Length)
{
j = 1;
}
}
if (src.AsSpan(0, 4).SequenceEqual(new byte[] { 0xC5, 0xEE, 0xF7, 0xFF }))
{
src = MiscUtils.Deflate(src);
}
File.WriteAllBytes(path, src);
return(true);
}
}
private static CustomCourse Read(byte[] bytes)
{
var course = new CustomCourse();
if (BinaryPrimitives.ReadUInt32LittleEndian(bytes) == 0xFFF7EEC5)
{
bytes = MiscUtils.Deflate(bytes);
}
course.Data = bytes;
using (var bs = new BinaryStream(new MemoryStream(bytes), ByteConverter.Big))
{
var magic = bs.ReadString(6);
if (magic != "GT6TED")
{
throw new FileFormatException($"Not a valid Custom Track File. (Magic needed is GT6TED, got {magic})");
}
bs.Position += 2;
bs.Position += 4;
course.Scenery = (SceneryType)bs.ReadInt32();
course.RoadWidth = bs.ReadSingle();
bs.Position += 8;
course.StartPoint = bs.ReadSingle();
var time = new PDIDATETIME32();
time.SetRawData(bs.ReadUInt32());
course.Time = time.GetDateTime();
course.IsCircuit = bs.ReadBoolean(BooleanCoding.Dword);
bs.Position += 8;
course.HomeStraightLength = bs.ReadSingle();
course.ElevationDifference = bs.ReadSingle();
course.CornerCount = bs.ReadInt32();
course.FinishLine = bs.ReadSingle();
course.StartLine = bs.ReadSingle();
return(course);
}
}