Ryujinx/Ryujinx.HLE/Utilities/FontUtils.cs

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using System.IO;
namespace Ryujinx.HLE.Utilities
{
public static class FontUtils
{
private static readonly uint FontKey = 0x06186249;
public static byte[] DecryptFont(Stream bfttfStream)
{
uint KXor(uint In) => In ^ 0x06186249;
using (BinaryReader reader = new BinaryReader(bfttfStream))
{
using (MemoryStream ttfStream = new MemoryStream())
{
using (BinaryWriter output = new BinaryWriter(ttfStream))
{
if (KXor(reader.ReadUInt32()) != 0x18029a7f)
{
throw new InvalidDataException("Error: Input file is not in BFTTF format!");
}
bfttfStream.Position += 4;
for (int i = 0; i < (bfttfStream.Length - 8) / 4; i++)
{
output.Write(KXor(reader.ReadUInt32()));
}
return ttfStream.ToArray();
}
}
}
}
}
}