public static VarConfig ReadNew(Stream stream)
{
VarConfig config = new VarConfig();
// Because of the Hash, two passes are necessary
byte[] buffer = new byte[stream.Length - stream.Position];
if (stream.Read(buffer, 0, buffer.Length) != buffer.Length)
{
throw new InvalidDataException("Could not read VarConfig buffer");
}
using BinaryReader reader = new BinaryReader(new MemoryStream(buffer, false));
byte[] expectedChecksum = reader.ReadBytes(16);
config.header = reader.ReadBytes(3);
config.firstValue = VarConfigValue.ReadNew(reader);
int startOfHashed = (int)(reader.BaseStream.Position);
while (reader.PeekChar() >= 0)
{
string name = ReadEncryptedString(reader);
VarConfigValue value = VarConfigValue.ReadNew(reader);
config.variables[name] = value;
}
using var md5 = MD5.Create();
byte[] actualChecksum = md5.ComputeHash(buffer, startOfHashed, buffer.Length - startOfHashed);
if (!actualChecksum.SequenceEqual(expectedChecksum))
{
throw new InvalidDataException("VarConfig checksums do not match");
}
return(config);
}
public void Write(BinaryWriter writer)
{
writer.Write(floatValue);
writer.Write((byte)(stringValue.Length > 0 ? 1 : 0));
if (stringValue.Length > 0)
{
VarConfig.WriteEncryptedString(writer, stringValue);
}
writer.Write((byte)1);
}
public static VarConfigValue ReadNew(BinaryReader reader)
{
float floatValue = reader.ReadSingle();
byte isString = reader.ReadByte();
string stringValue = isString == 0 ? ""
: VarConfig.ReadEncryptedString(reader);
reader.ReadByte(); // ignored byte at the end
return(new VarConfigValue(floatValue, stringValue));
}
