protected override IFileSystem CreateFileSystem()
{
var baseFs = new InMemoryFileSystem();
var keys = new byte[0x20];
var xtsFs = new AesXtsFileSystem(baseFs, keys, 0x4000);
return(xtsFs);
}
public static SwitchFs OpenSdCard(Keyset keyset, IAttributeFileSystem fileSystem)
{
var concatFs = new ConcatenationFileSystem(fileSystem);
var saveDirFs = new SubdirectoryFileSystem(concatFs, "/Nintendo/save");
var contentDirFs = new SubdirectoryFileSystem(concatFs, "/Nintendo/Contents");
var encSaveFs = new AesXtsFileSystem(saveDirFs, keyset.SdCardKeys[0], 0x4000);
var encContentFs = new AesXtsFileSystem(contentDirFs, keyset.SdCardKeys[1], 0x4000);
return(new SwitchFs(keyset, encContentFs, encSaveFs));
}
public Result Create(out IFileSystem encryptedFileSystem, IFileSystem baseFileSystem, EncryptedFsKeyId keyId,
ReadOnlySpan <byte> encryptionSeed)
{
encryptedFileSystem = default;
if (keyId < EncryptedFsKeyId.Save || keyId > EncryptedFsKeyId.CustomStorage)
{
return(ResultFs.InvalidArgument.Log());
}
// todo: "proper" key generation instead of a lazy hack
Keyset.SetSdSeed(encryptionSeed.ToArray());
encryptedFileSystem = new AesXtsFileSystem(baseFileSystem, Keyset.SdCardKeys[(int)keyId], 0x4000);
return(Result.Success);
}
public static SwitchFs OpenSdCard(Keyset keyset, IAttributeFileSystem fileSystem)
{
var concatFs = new ConcatenationFileSystem(fileSystem);
SubdirectoryFileSystem.CreateNew(out SubdirectoryFileSystem contentDirFs, concatFs, "/Nintendo/Contents".ToU8String()).ThrowIfFailure();
AesXtsFileSystem encSaveFs = null;
if (fileSystem.DirectoryExists("/Nintendo/save"))
{
SubdirectoryFileSystem.CreateNew(out SubdirectoryFileSystem saveDirFs, concatFs, "/Nintendo/save".ToU8String()).ThrowIfFailure();
encSaveFs = new AesXtsFileSystem(saveDirFs, keyset.SdCardKeys[0], 0x4000);
}
var encContentFs = new AesXtsFileSystem(contentDirFs, keyset.SdCardKeys[1], 0x4000);
return(new SwitchFs(keyset, encContentFs, encSaveFs));
}
public static SwitchFs OpenSdCard(KeySet keySet, IAttributeFileSystem fileSystem)
{
var concatFs = new ConcatenationFileSystem(fileSystem);
var contentDirFs = new SubdirectoryFileSystem(concatFs);
contentDirFs.Initialize("/Nintendo/Contents".ToU8String()).ThrowIfFailure();
AesXtsFileSystem encSaveFs = null;
if (fileSystem.DirectoryExists("/Nintendo/save"))
{
var saveDirFs = new SubdirectoryFileSystem(concatFs);
saveDirFs.Initialize("/Nintendo/save".ToU8String()).ThrowIfFailure();
encSaveFs = new AesXtsFileSystem(saveDirFs, keySet.SdCardEncryptionKeys[0].DataRo.ToArray(), 0x4000);
}
var encContentFs = new AesXtsFileSystem(contentDirFs, keySet.SdCardEncryptionKeys[1].DataRo.ToArray(), 0x4000);
return(new SwitchFs(keySet, encContentFs, encSaveFs));
}
