private byte[] ReadData()
{
var dataLength = _header.CompressedLength >= 0 ? _header.CompressedLength : _header.DecompressedLength;
var data = _stream.SetPosition(_dataOffset).ReadBytes(dataLength);
_originalRawData = data.ToArray();
if (_header.CompressedLength > -2)
{
for (var i = 0; i < Math.Min(dataLength, 0x100); i += 0x10)
{
EgsEncryption.DecryptChunk(_key, data, i, PASS_COUNT);
}
}
if (_header.CompressedLength > -1)
{
using var compressedStream = new MemoryStream(data);
using var deflate = new DeflateStream(compressedStream.SetPosition(2), CompressionMode.Decompress);
var decompressedData = new byte[_header.DecompressedLength];
deflate.Read(decompressedData, 0, decompressedData.Length);
data = decompressedData;
}
_originalData = data.ToArray();
return(data);
}
public byte[] DecompressRemasteredData(byte[] data, RemasteredEntry entry)
{
var paddedData = data;
if (data.Length % 16 != 0)
{
paddedData = new byte[data.Length + 16 - (data.Length % 16)];
}
Array.Copy(data, 0, paddedData, 0, data.Length);
if (entry.CompressedLength >= -1)
{
for (var i = 0; i < Math.Min(paddedData.Length, 0x100); i += 0x10)
{
EgsEncryption.DecryptChunk(_key, paddedData, i, PassCount);
}
}
if (entry.CompressedLength >= 0)
{
using var compressedStream = new MemoryStream(paddedData);
using var deflate = new DeflateStream(compressedStream.SetPosition(2), CompressionMode.Decompress);
var decompressedData = new byte[entry.DecompressedLength];
deflate.Read(decompressedData, 0, decompressedData.Length);
return(decompressedData);
}
return(paddedData);
}
public byte[] DecompressData(byte[] data)
{
if (_header.CompressedLength >= -1)
{
for (var i = 0; i < Math.Min(data.Length, 0x100); i += 0x10)
{
EgsEncryption.DecryptChunk(_key, data, i, PassCount);
}
}
if (_header.CompressedLength >= 0)
{
using var compressedStream = new MemoryStream(data);
using var deflate = new DeflateStream(compressedStream.SetPosition(2), CompressionMode.Decompress);
var decompressedData = new byte[_header.DecompressedLength];
deflate.Read(decompressedData, 0, decompressedData.Length);
return(decompressedData);
}
return(data);
}
private byte[] ReadRemasteredAsset(string assetName)
{
var header = _entries[assetName];
var dataLength = header.CompressedLength >= 0 ? header.CompressedLength : header.DecompressedLength;
if (dataLength % 16 != 0)
{
dataLength += 16 - (dataLength % 16);
}
var data = _stream.AlignPosition(0x10).ReadBytes(dataLength);
_remasteredAssetsRawData.Add(assetName, data.ToArray());
if (header.CompressedLength > -2)
{
for (var i = 0; i < Math.Min(dataLength, 0x100); i += 0x10)
{
EgsEncryption.DecryptChunk(_key, data, i, PASS_COUNT);
}
}
if (header.CompressedLength > -1)
{
using var compressedStream = new MemoryStream(data);
using var deflate = new DeflateStream(compressedStream.SetPosition(2), CompressionMode.Decompress);
var decompressedData = new byte[header.DecompressedLength];
deflate.Read(decompressedData, 0, decompressedData.Length);
data = decompressedData;
}
_remasteredAssetsData.Add(assetName, data.ToArray());
return(data);
}