mirror of
https://github.com/crskycode/GARbro.git
synced 2024-12-28 05:44:12 +08:00
735 lines
23 KiB
C#
735 lines
23 KiB
C#
//! \file ArcLINK.cs
|
|
//! \date Fri Jan 22 18:44:56 2016
|
|
//! \brief KaGuYa archive format.
|
|
//
|
|
// Copyright (C) 2016-2017 by morkt
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to
|
|
// deal in the Software without restriction, including without limitation the
|
|
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
// sell copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
// IN THE SOFTWARE.
|
|
//
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.ComponentModel.Composition;
|
|
using System.IO;
|
|
using System.Text;
|
|
|
|
namespace GameRes.Formats.Kaguya
|
|
{
|
|
internal class LinkEntry : PackedEntry
|
|
{
|
|
public bool IsEncrypted;
|
|
}
|
|
|
|
internal class LinkArchive : ArcFile
|
|
{
|
|
public readonly LinkEncryption Encryption;
|
|
|
|
public LinkArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, LinkEncryption enc)
|
|
: base (arc, impl, dir)
|
|
{
|
|
Encryption = enc;
|
|
}
|
|
}
|
|
|
|
[Export(typeof(ArchiveFormat))]
|
|
public class LinkOpener : ArchiveFormat
|
|
{
|
|
public override string Tag { get { return "ARC/LINK"; } }
|
|
public override string Description { get { return "KaGuYa script engine resource archive"; } }
|
|
public override uint Signature { get { return 0x4B4E494C; } } // 'LINK'
|
|
public override bool IsHierarchic { get { return false; } }
|
|
public override bool CanWrite { get { return false; } }
|
|
|
|
public LinkOpener ()
|
|
{
|
|
Extensions = new string[] { "arc" };
|
|
}
|
|
|
|
public override ArcFile TryOpen (ArcView file)
|
|
{
|
|
int version = file.View.ReadByte (4) - '0';
|
|
if (version < 3 || version > 6)
|
|
return null;
|
|
|
|
using (var reader = LinkReader.Create (file, version))
|
|
{
|
|
var dir = reader.ReadIndex();
|
|
if (null == dir)
|
|
return null;
|
|
|
|
if (reader.HasEncrypted)
|
|
{
|
|
var enc = reader.GetEncryption();
|
|
if (enc != null)
|
|
return new LinkArchive (file, this, dir, enc);
|
|
}
|
|
return new ArcFile (file, this, dir);
|
|
}
|
|
}
|
|
|
|
public override Stream OpenEntry (ArcFile arc, Entry entry)
|
|
{
|
|
var lent = entry as LinkEntry;
|
|
if (null == lent || (!lent.IsPacked && !lent.IsEncrypted))
|
|
return base.OpenEntry (arc, entry);
|
|
if (lent.IsEncrypted)
|
|
{
|
|
var larc = arc as LinkArchive;
|
|
if (null == larc)
|
|
return base.OpenEntry (arc, entry);
|
|
return larc.Encryption.DecryptEntry (larc, lent);
|
|
}
|
|
using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
|
|
using (var bmr = new BmrDecoder (input))
|
|
{
|
|
bmr.Unpack();
|
|
return new BinMemoryStream (bmr.Data, entry.Name);
|
|
}
|
|
}
|
|
}
|
|
|
|
internal class LinkReader : IDisposable
|
|
{
|
|
IBinaryStream m_input;
|
|
readonly long m_max_offset;
|
|
bool m_has_encrypted;
|
|
|
|
protected LinkReader (ArcView file)
|
|
{
|
|
m_input = file.CreateStream();
|
|
m_max_offset = file.MaxOffset;
|
|
m_has_encrypted = false;
|
|
}
|
|
|
|
public IBinaryStream Input { get { return m_input; } }
|
|
public bool HasEncrypted { get { return m_has_encrypted; } }
|
|
|
|
public static LinkReader Create (ArcView file, int version)
|
|
{
|
|
if (version < 4)
|
|
return new LinkReader (file);
|
|
else if (version < 6)
|
|
return new Link4Reader (file);
|
|
else
|
|
return new Link6Reader (file);
|
|
}
|
|
|
|
protected virtual long GetDataOffset ()
|
|
{
|
|
return 8;
|
|
}
|
|
|
|
protected virtual string ReadName ()
|
|
{
|
|
int name_length = m_input.ReadUInt8();
|
|
Skip (2);
|
|
return m_input.ReadCString (name_length);
|
|
}
|
|
|
|
public List<Entry> ReadIndex ()
|
|
{
|
|
m_input.Position = GetDataOffset();
|
|
|
|
var header = new byte[4];
|
|
var dir = new List<Entry>();
|
|
while (m_input.Position + 4 < m_max_offset)
|
|
{
|
|
long base_offset = m_input.Position;
|
|
uint size = m_input.ReadUInt32();
|
|
if (0 == size)
|
|
break;
|
|
if (size < 0x10)
|
|
return null;
|
|
int flags = m_input.ReadUInt16 ();
|
|
bool is_compressed = (flags & 3) != 0;
|
|
Skip (7);
|
|
var name = ReadName();
|
|
if (string.IsNullOrEmpty (name))
|
|
return null;
|
|
var entry = FormatCatalog.Instance.Create<LinkEntry> (name);
|
|
entry.Offset = m_input.Position;
|
|
entry.Size = size - (uint)(entry.Offset - base_offset);
|
|
if (is_compressed)
|
|
{
|
|
m_input.Read (header, 0, 4);
|
|
if (header.AsciiEqual ("BMR"))
|
|
{
|
|
entry.IsPacked = true;
|
|
entry.UnpackedSize = m_input.ReadUInt32();
|
|
}
|
|
}
|
|
entry.IsEncrypted = (flags & 4) != 0;
|
|
m_has_encrypted = m_has_encrypted || entry.IsEncrypted;
|
|
dir.Add (entry);
|
|
m_input.Position = entry.Offset + entry.Size;
|
|
}
|
|
return dir;
|
|
}
|
|
|
|
public virtual LinkEncryption GetEncryption ()
|
|
{
|
|
var params_dir = VFS.GetDirectoryName (m_input.Name);
|
|
var params_dat = VFS.CombinePath (params_dir, "params.dat");
|
|
if (!VFS.FileExists (params_dat))
|
|
return null;
|
|
|
|
using (var input = VFS.OpenBinaryStream (params_dat))
|
|
{
|
|
var param = ParamsDeserializer.Create (input);
|
|
return param.GetEncryption();
|
|
}
|
|
}
|
|
|
|
protected void Skip (int amount)
|
|
{
|
|
m_input.Seek (amount, SeekOrigin.Current);
|
|
}
|
|
|
|
#region IDisposable Members
|
|
public void Dispose ()
|
|
{
|
|
Dispose (true);
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
|
|
bool _disposed = false;
|
|
protected virtual void Dispose (bool disposing)
|
|
{
|
|
if (!_disposed)
|
|
{
|
|
if (disposing)
|
|
m_input.Dispose();
|
|
_disposed = true;
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
|
|
internal class Link4Reader : LinkReader
|
|
{
|
|
public Link4Reader (ArcView file) : base (file)
|
|
{
|
|
}
|
|
|
|
protected override long GetDataOffset ()
|
|
{
|
|
return 0xA;
|
|
}
|
|
}
|
|
|
|
internal class Link6Reader : LinkReader
|
|
{
|
|
public Link6Reader (ArcView file) : base (file)
|
|
{
|
|
}
|
|
|
|
protected override long GetDataOffset ()
|
|
{
|
|
Input.Position = 7;
|
|
return 8 + Input.ReadUInt8();
|
|
}
|
|
|
|
byte[] name_buffer = new byte[0x100];
|
|
|
|
protected override string ReadName ()
|
|
{
|
|
int name_length = Input.ReadUInt16();
|
|
if (name_length > 0x400)
|
|
throw new InvalidFormatException();
|
|
if (name_length > name_buffer.Length)
|
|
name_buffer = new byte[name_length];
|
|
Input.Read (name_buffer, 0, name_length);
|
|
return Encoding.Unicode.GetString (name_buffer, 0, name_length);
|
|
}
|
|
}
|
|
|
|
internal class BmrDecoder : IDisposable
|
|
{
|
|
byte[] m_output;
|
|
MsbBitStream m_input;
|
|
int m_final_size;
|
|
int m_step;
|
|
int m_key;
|
|
|
|
public byte[] Data { get { return m_output; } }
|
|
|
|
public BmrDecoder (IBinaryStream input)
|
|
{
|
|
input.Position = 3;
|
|
m_step = input.ReadUInt8();
|
|
m_final_size = input.ReadInt32();
|
|
m_key = input.ReadInt32();
|
|
int unpacked_size = input.ReadInt32();
|
|
m_output = new byte[unpacked_size];
|
|
m_input = new MsbBitStream (input.AsStream, true);
|
|
}
|
|
|
|
public void Unpack ()
|
|
{
|
|
m_input.Input.Position = 0x14;
|
|
UnpackHuffman();
|
|
UndoMoveToFront();
|
|
m_output = Decode (m_output, m_key);
|
|
if (m_step != 0)
|
|
m_output = DecompressRLE (m_output);
|
|
}
|
|
|
|
byte[] DecompressRLE (byte[] input)
|
|
{
|
|
var result = new byte[m_final_size];
|
|
int src = 0;
|
|
for (int i = 0; i < m_step; ++i)
|
|
{
|
|
byte v1 = input[src++];
|
|
result[i] = v1;
|
|
int dst = i + m_step;
|
|
while (dst < result.Length)
|
|
{
|
|
byte v2 = input[src++];
|
|
result[dst] = v2;
|
|
dst += m_step;
|
|
if (v2 == v1)
|
|
{
|
|
int count = input[src++];
|
|
if (0 != (count & 0x80))
|
|
count = input[src++] + ((count & 0x7F) << 8) + 128;
|
|
while (count --> 0 && dst < result.Length)
|
|
{
|
|
result[dst] = v2;
|
|
dst += m_step;
|
|
}
|
|
if (dst < result.Length)
|
|
{
|
|
v2 = input[src++];
|
|
result[dst] = v2;
|
|
dst += m_step;
|
|
}
|
|
}
|
|
v1 = v2;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
void UndoMoveToFront ()
|
|
{
|
|
var dict = new byte[256];
|
|
for (int i = 0; i < 256; ++i)
|
|
dict[i] = (byte)i;
|
|
for (int i = 0; i < m_output.Length; ++i)
|
|
{
|
|
byte v = m_output[i];
|
|
m_output[i] = dict[v];
|
|
for (int j = v; j > 0; --j)
|
|
{
|
|
dict[j] = dict[j-1];
|
|
}
|
|
dict[0] = m_output[i];
|
|
}
|
|
}
|
|
|
|
byte[] Decode (byte[] input, int key)
|
|
{
|
|
var freq_table = new int[256];
|
|
for (int i = 0; i < input.Length; ++i)
|
|
{
|
|
++freq_table[input[i]];
|
|
}
|
|
for (int i = 1; i < 256; ++i)
|
|
{
|
|
freq_table[i] += freq_table[i-1];
|
|
}
|
|
var distrib_table = new int[input.Length];
|
|
for (int i = input.Length-1; i >= 0; --i)
|
|
{
|
|
int v = input[i];
|
|
int freq = --freq_table[v];
|
|
distrib_table[freq] = i;
|
|
}
|
|
int pos = key;
|
|
var copy_out = new byte[input.Length];
|
|
for (int i = 0; i < copy_out.Length; ++i)
|
|
{
|
|
pos = distrib_table[pos];
|
|
copy_out[i] = input[pos];
|
|
}
|
|
return copy_out;
|
|
}
|
|
|
|
ushort m_token;
|
|
ushort[,] m_tree = new ushort[2,256];
|
|
|
|
void UnpackHuffman ()
|
|
{
|
|
m_token = 256;
|
|
ushort root = CreateHuffmanTree();
|
|
int dst = 0;
|
|
while (dst < m_output.Length)
|
|
{
|
|
ushort symbol = root;
|
|
while (symbol >= 0x100)
|
|
{
|
|
int bit = m_input.GetNextBit();
|
|
if (-1 == bit)
|
|
throw new EndOfStreamException();
|
|
symbol = m_tree[bit,symbol-256];
|
|
}
|
|
m_output[dst++] = (byte)symbol;
|
|
}
|
|
}
|
|
|
|
ushort CreateHuffmanTree ()
|
|
{
|
|
if (0 != m_input.GetNextBit())
|
|
{
|
|
ushort v = m_token++;
|
|
m_tree[0,v-256] = CreateHuffmanTree();
|
|
m_tree[1,v-256] = CreateHuffmanTree();
|
|
return v;
|
|
}
|
|
else
|
|
{
|
|
return (ushort)m_input.GetBits (8);
|
|
}
|
|
}
|
|
|
|
#region IDisposable Members
|
|
bool _disposed = false;
|
|
public void Dispose ()
|
|
{
|
|
if (!_disposed)
|
|
{
|
|
m_input.Dispose();
|
|
_disposed = true;
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
|
|
internal abstract class ParamsDeserializer
|
|
{
|
|
protected IBinaryStream m_input;
|
|
protected string m_title;
|
|
protected Version m_version;
|
|
|
|
protected ParamsDeserializer (IBinaryStream input, Version version)
|
|
{
|
|
m_input = input;
|
|
m_version = version;
|
|
}
|
|
|
|
public static ParamsDeserializer Create (IBinaryStream input)
|
|
{
|
|
var header = input.ReadHeader (0x11);
|
|
if (header.AsciiEqual ("[SCR-PARAMS]v0"))
|
|
{
|
|
var version = Version.Parse (header.GetCString (13, 4));
|
|
if (2 == version.Major)
|
|
return new ParamsV2Deserializer (input, version);
|
|
else if (5 == version.Major && (version.Minor >= 4 && version.Minor <= 7))
|
|
return new ParamsV5Deserializer (input, version);
|
|
}
|
|
throw new UnknownEncryptionScheme();
|
|
}
|
|
|
|
public virtual LinkEncryption GetEncryption ()
|
|
{
|
|
return new LinkEncryption (GetKey());
|
|
}
|
|
|
|
public abstract byte[] GetKey ();
|
|
|
|
protected byte[] ReadKey ()
|
|
{
|
|
int key_length = m_input.ReadInt32();
|
|
return m_input.ReadBytes (key_length);
|
|
}
|
|
|
|
protected virtual string ReadString ()
|
|
{
|
|
int length = m_input.ReadUInt8();
|
|
return m_input.ReadCString (length);
|
|
}
|
|
|
|
protected virtual void SkipString ()
|
|
{
|
|
SkipChunk();
|
|
}
|
|
|
|
protected void Skip (int amount)
|
|
{
|
|
m_input.Seek (amount, SeekOrigin.Current);
|
|
}
|
|
|
|
protected void SkipChunk ()
|
|
{
|
|
Skip (m_input.ReadUInt8());
|
|
}
|
|
|
|
protected void SkipArray ()
|
|
{
|
|
int count = m_input.ReadUInt8();
|
|
for (int i = 0; i < count; ++i)
|
|
SkipChunk();
|
|
}
|
|
|
|
protected void SkipDict ()
|
|
{
|
|
int count = m_input.ReadUInt8();
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
SkipString();
|
|
SkipString();
|
|
}
|
|
}
|
|
}
|
|
|
|
internal class ParamsV2Deserializer : ParamsDeserializer
|
|
{
|
|
public ParamsV2Deserializer (IBinaryStream input, Version version) : base (input, version)
|
|
{
|
|
}
|
|
|
|
public override LinkEncryption GetEncryption ()
|
|
{
|
|
var key = GetKey();
|
|
return new LinkEncryption (key, m_title != "幼なじみと甘～くエッチに過ごす方法");
|
|
}
|
|
|
|
public override byte[] GetKey ()
|
|
{
|
|
m_input.Position = 0x17;
|
|
SkipChunk();
|
|
m_title = ReadString();
|
|
m_input.ReadCString();
|
|
SkipString();
|
|
SkipString();
|
|
m_input.ReadByte();
|
|
SkipString();
|
|
SkipString();
|
|
SkipDict();
|
|
m_input.ReadByte();
|
|
|
|
if ("幼なじみと甘～くエッチに過ごす方法" == m_title)
|
|
{
|
|
int count = m_input.ReadUInt8();
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
m_input.ReadByte();
|
|
SkipChunk();
|
|
SkipArray();
|
|
SkipChunk();
|
|
}
|
|
SkipArray();
|
|
SkipArray();
|
|
m_input.ReadInt32();
|
|
return m_input.ReadBytes (240000);
|
|
}
|
|
else // 毎日がＭ！
|
|
{
|
|
int count = m_input.ReadUInt8();
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
m_input.ReadByte();
|
|
SkipChunk();
|
|
SkipArray();
|
|
SkipArray();
|
|
}
|
|
SkipDict();
|
|
count = m_input.ReadUInt8();
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
SkipChunk();
|
|
SkipArray();
|
|
SkipArray();
|
|
}
|
|
return ReadKey();
|
|
}
|
|
}
|
|
}
|
|
|
|
internal class ParamsV5Deserializer : ParamsDeserializer
|
|
{
|
|
public ParamsV5Deserializer (IBinaryStream input, Version version) : base (input, version)
|
|
{
|
|
}
|
|
|
|
public override byte[] GetKey ()
|
|
{
|
|
// ハラミタマ
|
|
m_input.Position = 0x1B;
|
|
SkipChunk();
|
|
m_title = ReadString();
|
|
SkipString();
|
|
SkipString();
|
|
m_input.ReadByte();
|
|
SkipString();
|
|
SkipString();
|
|
SkipDict();
|
|
|
|
Skip (m_version.Minor <= 4 ? 0x10 : 0x11);
|
|
for (int i = 0; i < 3; ++i)
|
|
{
|
|
if (0 != m_input.ReadUInt8())
|
|
SkipTree();
|
|
}
|
|
Skip (m_input.ReadInt32() * 0xC);
|
|
return ReadKey();
|
|
}
|
|
|
|
protected override void SkipString ()
|
|
{
|
|
int length = m_input.ReadUInt16();
|
|
Skip (length);
|
|
}
|
|
|
|
byte[] name_buffer = new byte[0x100];
|
|
|
|
protected override string ReadString ()
|
|
{
|
|
int length = m_input.ReadUInt16();
|
|
if (length > name_buffer.Length)
|
|
name_buffer = new byte[length];
|
|
m_input.Read (name_buffer, 0, length);
|
|
return Encoding.Unicode.GetString (name_buffer, 0, length);
|
|
}
|
|
|
|
protected void SkipTree ()
|
|
{
|
|
SkipString();
|
|
int count = m_input.ReadInt32();
|
|
while (count --> 0)
|
|
{
|
|
SkipString();
|
|
SkipString();
|
|
}
|
|
count = m_input.ReadInt32();
|
|
while (count --> 0)
|
|
SkipTree();
|
|
}
|
|
}
|
|
|
|
internal class LinkEncryption
|
|
{
|
|
byte[] m_key;
|
|
Tuple<string, Decryptor>[] m_type_table;
|
|
|
|
delegate Stream Decryptor (LinkArchive arc, LinkEntry entry);
|
|
|
|
public LinkEncryption (byte[] key, bool anm_encrypted = true)
|
|
{
|
|
if (null == key || 0 == key.Length)
|
|
throw new ArgumentException ("Invalid encryption key");
|
|
m_key = key;
|
|
var table = new List<Tuple<string, Decryptor>>
|
|
{
|
|
new Tuple<string, Decryptor> ("BM", (a, e) => DecryptImage (a, e, 0x36)),
|
|
new Tuple<string, Decryptor> ("AP-2", (a, e) => DecryptImage (a, e, 0x18)),
|
|
new Tuple<string, Decryptor> ("AP-3", (a, e) => DecryptImage (a, e, 0x18)),
|
|
new Tuple<string, Decryptor> ("AP", (a, e) => DecryptImage (a, e, 0xC)),
|
|
};
|
|
if (anm_encrypted)
|
|
{
|
|
table.Add (new Tuple<string, Decryptor> ("AN00", (a, e) => DecryptAn00 (a, e)));
|
|
table.Add (new Tuple<string, Decryptor> ("AN21", (a, e) => DecryptAn21 (a, e)));
|
|
}
|
|
m_type_table = table.ToArray();
|
|
}
|
|
|
|
public Stream DecryptEntry (LinkArchive arc, LinkEntry entry)
|
|
{
|
|
var header = arc.File.View.ReadBytes (entry.Offset, 4);
|
|
foreach (var type in m_type_table)
|
|
{
|
|
if (header.AsciiEqual (type.Item1))
|
|
return type.Item2 (arc, entry);
|
|
}
|
|
return arc.File.CreateStream (entry.Offset, entry.Size);
|
|
}
|
|
|
|
Stream DecryptImage (LinkArchive arc, LinkEntry entry, uint data_offset)
|
|
{
|
|
var header = arc.File.View.ReadBytes (entry.Offset, data_offset);
|
|
Stream body = arc.File.CreateStream (entry.Offset+data_offset, entry.Size-data_offset);
|
|
body = new ByteStringEncryptedStream (body, m_key);
|
|
return new PrefixStream (header, body);
|
|
}
|
|
|
|
Stream DecryptAn00 (LinkArchive arc, LinkEntry entry)
|
|
{
|
|
var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
|
|
int frame_offset = 0x18 + data.ToUInt16 (0x14) * 4;
|
|
int count = data.ToUInt16 (frame_offset);
|
|
frame_offset += 10;
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
int w = data.ToInt32 (frame_offset);
|
|
int h = data.ToInt32 (frame_offset+4);
|
|
int size = 4 * w * h;
|
|
frame_offset += 8;
|
|
DecryptData (data, frame_offset, size);
|
|
frame_offset += size + 8;
|
|
}
|
|
return new BinMemoryStream (data, entry.Name);
|
|
}
|
|
|
|
Stream DecryptAn21 (LinkArchive arc, LinkEntry entry)
|
|
{
|
|
var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
|
|
int count = data.ToUInt16 (4);
|
|
int offset = 8;
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
switch (data[offset++])
|
|
{
|
|
case 0: break;
|
|
case 1: offset += 8; break;
|
|
case 2:
|
|
case 3:
|
|
case 4:
|
|
case 5: offset += 4; break;
|
|
default: return new BinMemoryStream (data, entry.Name);
|
|
}
|
|
}
|
|
count = data.ToUInt16 (offset);
|
|
offset += 2 + count * 8 + 0x21;
|
|
int w = data.ToInt32 (offset);
|
|
int h = data.ToInt32 (offset+4);
|
|
int channels = data.ToInt32 (offset+8);
|
|
offset += 12;
|
|
DecryptData (data, offset, channels * w * h);
|
|
return new BinMemoryStream (data, entry.Name);
|
|
}
|
|
|
|
void DecryptData (byte[] data, int index, int length)
|
|
{
|
|
while (length > 0)
|
|
{
|
|
int count = Math.Min (length, m_key.Length);
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
data[index++] ^= m_key[i];
|
|
}
|
|
length -= count;
|
|
}
|
|
}
|
|
}
|
|
}
|