public IList <IArchiveFileInfo> Load(Stream input)
{
// Prepare binary readers
using var br = new BinaryReaderX(input, true);
var isoStream = new SubStream(input, 0x1800, input.Length - 0x1800);
// Read header
_header = br.ReadType <CvmHeader>();
_zoneInfo = br.ReadType <CvmZoneInfo>();
_unkDataLoc = br.ReadBytes(0x800);
// Prepare decryption stream
Stream decStream = isoStream;
if (_header.IsEncrypted)
{
_detectedPassword = DetectPassword(isoStream);
decStream = new RofsCryptoStream(isoStream, _detectedPassword, 0, 0x800);
}
using var decBr = new BinaryReaderX(decStream);
// Read ISO primary descriptor
decStream.Position = 0x8000;
_primeDesc = decBr.ReadType <IsoPrimaryDescriptor>();
// Read record tree
return(ParseDirTree(decBr, isoStream, _primeDesc.rootDirRecord.extentLe, _primeDesc.rootDirRecord.sizeLe, UPath.Root).ToArray());
}
private string DetectPassword(Stream input)
{
input = new SubStream(input, 0x8000, 0x800);
foreach (var pw in Passwords)
{
using var cipher = new RofsCryptoStream(input, pw, 0x10, 0x800);
using var cipherBr = new BinaryReaderX(cipher);
cipher.Position = 1;
if (cipherBr.ReadString(5) == "CD001")
{
return(pw);
}
}
throw new InvalidOperationException("Password could not be detected. Please report this on the github of the developers of Kuriimu2.");
}
public void Save(Stream output, IList <IArchiveFileInfo> files)
{
var fileTree = files.ToTree();
// Pre-calculate size of the TOC
var dirSize = CalculateDirTreeSize(fileTree);
// Prepare streams
output.SetLength(0xB800 + dirSize);
Stream tocStream = new SubStream(output, 0x1800, 0xA000 + dirSize);
if (_header.IsEncrypted)
{
tocStream = new RofsCryptoStream(tocStream, _detectedPassword, 0, 0x800);
}
// Write files and TOC
using var tocBw = new BinaryWriterX(tocStream);
var fileOffset = (long)(0xB800 + dirSize);
WriteDirTree(fileTree, output, tocBw, 0xA000, ref fileOffset);
// Write pre TOC information
_primeDesc.volSizeBe = (int)((output.Length - 0x1800 + 0x7FF) & ~0x7FF);
_primeDesc.volSizeLe = (int)((output.Length - 0x1800 + 0x7FF) & ~0x7FF);
_primeDesc.logicalBlockSizeLe = 0x800;
_primeDesc.logicalBlockSizeBe = 0x800;
_primeDesc.rootDirRecord.sizeLe = (uint)dirSize;
_primeDesc.rootDirRecord.sizeBe = (uint)dirSize;
tocStream.Position = 0x8000;
tocBw.WriteType(_primeDesc);
tocBw.WriteAlignment(0x800);
// Write end ISO sector
tocBw.Write((byte)0xFF);
tocBw.WriteString("CD001", Encoding.ASCII, false, false);
tocBw.Write((short)0x1);
tocBw.WriteAlignment(0x800);
// Write root dir information in little endian
tocBw.Write((short)0x1);
tocBw.Write(0x14);
tocBw.Write((short)1);
tocBw.WriteAlignment(0x800);
// Write root dir information in big endian
tocBw.Write((short)0x1);
tocBw.ByteOrder = ByteOrder.BigEndian;
tocBw.Write(0x14);
tocBw.Write((short)1);
// Write CVM header information
_header.fileSize = output.Length;
_zoneInfo.isoDataLoc.length = output.Length - 0x1800;
using var bw = new BinaryWriterX(output);
output.Position = 0;
bw.WriteType(_header);
bw.WriteType(_zoneInfo);
bw.Write(_unkDataLoc);
}
