public BSFile(string fileName, byte[] data, AesManaged aes, BSFileHeader header)
{
this.fileName = fileName;
this._data = data;
this._aes = aes;
this._header = header;
}
/// <summary>
/// Reads the compressed header
/// </summary>
private void readHeader()
{
_reader.BaseStream.Seek(89, SeekOrigin.Begin);
int compressedSize = _reader.ReadInt32();
int ucompressedSize = _reader.ReadInt32();
int padding = (compressedSize % 16 != 0) ? 16 - (compressedSize % 16) : 0;
byte[] buffer = _reader.ReadBytes(compressedSize + padding);
byte[] data = Crypto.Decrypt(buffer, _aes);
if (data.Length != ucompressedSize)
{
throw new Exception("Decompression failed. Data.length != uncompressedSize");
}
int positionCheck = _reader.ReadInt32();
if (positionCheck != _reader.BaseStream.Position)
{
throw new Exception("Decompression failed. positionCheck != _reader.BaseStream.Position");
}
using (MemoryStream ms = new MemoryStream(data))
{
using (BinaryReader br = new BinaryReader(ms))
{
int size = Marshal.SizeOf(typeof(BSFileHeader)); //80
while (ms.Position < ms.Length)
{
var strSize = br.ReadInt32();
var fileName = Encoding.Unicode.GetString(br.ReadBytes(strSize * 2));
var _struct = br.ReadBytes(size);
GCHandle handle = GCHandle.Alloc(_struct, GCHandleType.Pinned);
BSFileHeader header = (BSFileHeader)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(BSFileHeader));
handle.Free();
BSFile bnsFile = new BSFile(fileName, _reader.ReadBytes(header.compressed), _aes, header);
_files.Add(fileName, bnsFile);
}
}
}
}