private IStorage OpenAesCtrExStorage(IStorage baseStorage, int index)
{
NcaFsHeader fsHeader = Header.GetFsHeader(index);
NcaFsPatchInfo info = fsHeader.GetPatchInfo();
long sectionOffset = Header.GetSectionStartOffset(index);
long sectionSize = Header.GetSectionSize(index);
long bktrOffset = info.RelocationTreeOffset;
long bktrSize = sectionSize - bktrOffset;
long dataSize = info.RelocationTreeOffset;
byte[] key = GetContentKey(NcaKeyType.AesCtr);
byte[] counter = Aes128CtrStorage.CreateCounter(fsHeader.Counter, bktrOffset + sectionOffset);
byte[] counterEx = Aes128CtrStorage.CreateCounter(fsHeader.Counter, sectionOffset);
IStorage bucketTreeData = new CachedStorage(new Aes128CtrStorage(baseStorage.Slice(bktrOffset, bktrSize), key, counter, true), 4, true);
IStorage encryptionBucketTreeData = bucketTreeData.Slice(info.EncryptionTreeOffset - bktrOffset);
IStorage decStorage = new Aes128CtrExStorage(baseStorage.Slice(0, dataSize), encryptionBucketTreeData, key, counterEx, true);
decStorage = new CachedStorage(decStorage, 0x4000, 4, true);
return(new ConcatenationStorage(new[] { decStorage, bucketTreeData }, true));
}
private static bool FindEmuMMC(DriveInfo drive)
{
DirectoryInfo root = drive.RootDirectory;
FileInfo emummcIni = root.GetFile("emuMMC/emummc.ini");
if (emummcIni.Exists)
{
// find the DiskDrive associated with this drive letter
VolumeInfo volume = AllVolumes
.Where(x => x.Caption == drive.Name).FirstOrDefault();
LogicalDiskInfo logicalDisk = AllLogicalDisks
.Where(x => x.DeviceID == volume.DriveLetter).FirstOrDefault();
IEnumerable <PartitionInfo> partitionsFromLogicalDisk = ToDiskPartitions(logicalDisk);
if (!partitionsFromLogicalDisk.Any())
{
return(false);
}
DiskInfo disk = AllDisks.Where(x => x.Index == partitionsFromLogicalDisk.First().DiskIndex).FirstOrDefault();
IEnumerable <PartitionInfo> partitions = AllPartitions.Where(x => x.DiskIndex == disk.Index);
// parse ini
FileIniDataParser parser = new FileIniDataParser();
IniData ini = parser.ReadFile(emummcIni.FullName);
ini.SectionKeySeparator = '/';
if (!ini.TryGetKey("emummc/sector", out string sectorStr))
{
return(false);
}
ulong sector = ulong.Parse(sectorStr.Replace("0x", ""), System.Globalization.NumberStyles.HexNumber);
PartitionInfo partition = partitions.Where(x =>
(sector * x.BlockSize)
- 0x1000000 /* hekate's 16MB padding to protect the emuMMC */
== x.StartingOffset).FirstOrDefault();
bool usingEmummc = partition != null;
if (usingEmummc)
{
MessageBoxResult r = MessageBox.Show("emuMMC was detected on this SD card. Do you want to open that instead of sysMMC content?", "emuMMC", MessageBoxButton.YesNo);
if (r == MessageBoxResult.No)
{
usingEmummc = false;
}
}
if (usingEmummc)
{
DeviceStream stream = new DeviceStream(disk.PhysicalName, disk.Length);
IStorage diskStorage = new CachedStorage(stream.AsStorage().AsReadOnly(), disk.SectorSize * 100, 4, true);
long offset = (long)partition.StartingOffset;
offset += 0x1000000; // account for hekate's padding
offset += 0x400000; // BOOT0
offset += 0x400000; // BOOT1
NANDService.InsertNAND(diskStorage.Slice(offset, (long)partition.Size), false);
}
return(usingEmummc);
}
return(false);
}