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implemented encrypted AZ system archives and TYP1 images.

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morkt 2016-01-15 11:56:10 +04:00
parent 04aa35e638
commit a1a9a17703
5 changed files with 747 additions and 2 deletions
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348
ArcFormats/AZSys/ArcEncrypted.cs Normal file
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//! \file ArcEncrypted.cs
//! \date Thu Jan 14 03:27:52 2016
//! \brief Encrypted AZ system resource archives.
//
// Copyright (C) 2016 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 GameRes.Compression;
using GameRes.Utility;
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
namespace GameRes.Formats.AZSys
{
[Serializable]
public class EncryptionScheme
{
public readonly uint IndexKey;
public readonly uint? ContentKey;
public static readonly uint[] DefaultSeed = { 0x2F4D7DFE, 0x47345292, 0x1BA5FE82, 0x7BC04525 };
public EncryptionScheme (uint ikey, uint ckey)
{
IndexKey = ikey;
ContentKey = ckey;
}
public EncryptionScheme (uint[] iseed)
{
IndexKey = GenerateKey (iseed);
ContentKey = null;
}
public EncryptionScheme (uint[] iseed, byte[] cseed)
{
IndexKey = GenerateKey (iseed);
ContentKey = GenerateContentKey (cseed);
}
public static uint GenerateKey (uint[] seed)
{
if (null == seed)
throw new ArgumentNullException ("seed");
if (seed.Length < 4)
throw new ArgumentException();
byte[] seed_bytes = new byte[0x10];
Buffer.BlockCopy (seed, 0, seed_bytes, 0, 0x10);
uint key = Crc32.UpdateCrc (~seed[0], seed_bytes, 0, seed_bytes.Length)
^ Crc32.UpdateCrc (~(seed[1] & 0xFFFF), seed_bytes, 0, seed_bytes.Length)
^ Crc32.UpdateCrc (~(seed[1] >> 16), seed_bytes, 0, seed_bytes.Length)
^ Crc32.UpdateCrc (~seed[2], seed_bytes, 0, seed_bytes.Length)
^ Crc32.UpdateCrc (~seed[3], seed_bytes, 0, seed_bytes.Length);
return seed[0] ^ ~key;
}
public static uint GenerateContentKey (byte[] env_bytes)
{
if (null == env_bytes)
throw new ArgumentNullException ("env_bytes");
if (env_bytes.Length < 0x10)
throw new ArgumentException();
uint crc = Crc32.Compute (env_bytes, 0, 0x10);
var sfmt = new FastMersenneTwister (crc);
var seed = new uint[4];
seed[0] = sfmt.GetRand32();
seed[1] = sfmt.GetRand32() & 0xFFFF;
seed[1] |= sfmt.GetRand32() << 16;
seed[2] = sfmt.GetRand32();
seed[3] = sfmt.GetRand32();
return GenerateKey (seed);
}
}
[Serializable]
public class AzScheme : ResourceScheme
{
public Dictionary<string, EncryptionScheme> KnownSchemes;
}
internal class AzArchive : ArcFile
{
public readonly uint SysenvKey;
public readonly uint RegularKey;
public AzArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, uint syskey, uint regkey)
: base (arc, impl, dir)
{
SysenvKey = syskey;
RegularKey = regkey;
}
}
[Export(typeof(ArchiveFormat))]
public class ArcEncryptedOpener : ArchiveFormat
{
public override string Tag { get { return "ARC/AZ/encrypted"; } }
public override string Description { get { return "AZ system encrypted resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public static Dictionary<string, EncryptionScheme> KnownSchemes = new Dictionary<string, EncryptionScheme>
{
{ "Default", new EncryptionScheme (EncryptionScheme.DefaultSeed) },
};
public override ResourceScheme Scheme
{
get { return new AzScheme { KnownSchemes = KnownSchemes }; }
set { KnownSchemes = ((AzScheme)value).KnownSchemes; }
}
public ArcEncryptedOpener ()
{
Extensions = new string[] { "arc" };
Signatures = new uint[] { 0x53EA06EB, 0x74F98F2F };
}
EncryptionScheme CurrentScheme;
public override ArcFile TryOpen (ArcView file)
{
byte[] header_encrypted = file.View.ReadBytes (0, 0x30);
if (header_encrypted.Length < 0x30)
return null;
byte[] header = new byte[header_encrypted.Length];
if (CurrentScheme != null)
{
try
{
Buffer.BlockCopy (header_encrypted, 0, header, 0, header.Length);
Decrypt (header, 0, CurrentScheme.IndexKey);
if (Binary.AsciiEqual (header, 0, "ARC\0"))
{
var arc = ReadIndex (file, header, CurrentScheme);
if (null != arc)
return arc;
}
}
catch { /* ignore parse errors */ }
}
foreach (var scheme in KnownSchemes.Values)
{
Buffer.BlockCopy (header_encrypted, 0, header, 0, header.Length);
Decrypt (header, 0, scheme.IndexKey);
if (Binary.AsciiEqual (header, 0, "ARC\0"))
{
var arc = ReadIndex (file, header, scheme);
if (null != arc)
CurrentScheme = new EncryptionScheme (arc.SysenvKey, arc.RegularKey);
return arc;
}
}
return null;
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var azarc = arc as AzArchive;
if (null == azarc)
return base.OpenEntry (arc, entry);
var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
if (entry.Name.Equals ("sysenv.tbl", StringComparison.InvariantCultureIgnoreCase))
{
Decrypt (data, entry.Offset, azarc.SysenvKey);
return UnpackData (data);
}
Decrypt (data, entry.Offset, azarc.RegularKey);
if (data.Length > 0x14 && Binary.AsciiEqual (data, 0, "ASB\0"))
{
return OpenAsb (data);
}
return new MemoryStream (data);
}
Stream OpenAsb (byte[] data)
{
int packed_size = LittleEndian.ToInt32 (data, 4);
if (packed_size <= 4 || packed_size > data.Length-0x10)
return new MemoryStream (data);
uint unpacked_size = LittleEndian.ToUInt32 (data, 8);
uint key = unpacked_size ^ 0x9E370001;
unsafe
{
fixed (byte* raw = &data[0x10])
{
uint* data32 = (uint*)raw;
for (int i = packed_size/4; i > 0; --i)
*data32++ -= key;
}
}
var asb = UnpackData (data, 0x10);
var header = new byte[0x10];
Buffer.BlockCopy (data, 0, header, 0, 0x10);
return new PrefixStream (header, asb);
}
byte[] ReadSysenvSeed (ArcView file, Entry entry, uint key)
{
var data = file.View.ReadBytes (entry.Offset, entry.Size);
if (data.Length <= 4)
throw new InvalidFormatException ("Invalid sysenv.tbl size");
Decrypt (data, entry.Offset, key);
uint adler32 = LittleEndian.ToUInt32 (data, 0);
if (adler32 != Adler32.Compute (data, 4, data.Length-4))
throw new InvalidEncryptionScheme();
using (var input = new MemoryStream (data, 4, data.Length-4))
using (var sysenv_stream = new ZLibStream (input, CompressionMode.Decompress))
{
var seed = new byte[0x10];
if (0x10 != sysenv_stream.Read (seed, 0, 0x10))
throw new InvalidFormatException ("Invalid sysenv.tbl size");
return seed;
}
}
Stream UnpackData (byte[] data, int index = 0)
{
int length = data.Length - index;
if (length <= 4)
return new MemoryStream (data, index, length);
uint adler32 = LittleEndian.ToUInt32 (data, index);
if (adler32 != Adler32.Compute (data, index+4, length-4))
return new MemoryStream (data, index, length);
var input = new MemoryStream (data, index+4, length-4);
return new ZLibStream (input, CompressionMode.Decompress);
}
AzArchive ReadIndex (ArcView file, byte[] header, EncryptionScheme scheme)
{
int ext_count = LittleEndian.ToInt32 (header, 4);
int count = LittleEndian.ToInt32 (header, 8);
uint index_length = LittleEndian.ToUInt32 (header, 12);
if (ext_count < 1 || ext_count > 8 || !IsSaneCount (count) || index_length >= file.MaxOffset)
return null;
var packed_index = file.View.ReadBytes (header.Length, index_length);
if (packed_index.Length != index_length)
return null;
Decrypt (packed_index, header.Length, scheme.IndexKey);
uint checksum = LittleEndian.ToUInt32 (packed_index, 0);
if (checksum != Adler32.Compute (packed_index, 4, packed_index.Length-4))
{
if (checksum != Crc32.Compute (packed_index, 4, packed_index.Length-4))
throw new InvalidFormatException ("Index checksum mismatch");
}
uint base_offset = (uint)header.Length + index_length;
using (var input = new MemoryStream (packed_index, 4, packed_index.Length-4))
using (var zstream = new ZLibStream (input, CompressionMode.Decompress))
using (var index = new BinaryReader (zstream))
{
var dir = new List<Entry> (count);
var name_buffer = new byte[0x20];
for (int i = 0; i < count; ++i)
{
uint offset = index.ReadUInt32();
uint size = index.ReadUInt32();
uint crc = index.ReadUInt32();
index.ReadInt32();
if (name_buffer.Length != index.Read (name_buffer, 0, name_buffer.Length))
return null;
var name = Binary.GetCString (name_buffer, 0, 0x20);
if (0 == name.Length)
return null;
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = base_offset + offset;
entry.Size = size;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
uint content_key = GetContentKey (file, dir, scheme);
return new AzArchive (file, this, dir, scheme.IndexKey, content_key);
}
}
static void Decrypt (byte[] data, long offset, uint key)
{
ulong hash = key * 0x9E370001ul;
if (0 != (offset & 0x3F))
{
hash = Binary.RotL (hash, (int)offset);
}
for (uint i = 0; i < data.Length; ++i)
{
data[i] ^= (byte)hash;
hash = Binary.RotL (hash, 1);
}
}
uint GetContentKey (ArcView file, List<Entry> dir, EncryptionScheme scheme)
{
if (null != scheme.ContentKey)
return scheme.ContentKey.Value;
if ("system.arc".Equals (Path.GetFileName (file.Name), StringComparison.InvariantCultureIgnoreCase))
{
var sysenv = dir.FirstOrDefault (e => e.Name.Equals ("sysenv.tbl", StringComparison.InvariantCultureIgnoreCase));
if (null != sysenv)
{
var seed = ReadSysenvSeed (file, sysenv, scheme.IndexKey);
return EncryptionScheme.GenerateContentKey (seed);
}
}
else
{
var system_arc = VFS.CombinePath (Path.GetDirectoryName (file.Name), "system.arc");
using (var arc = VFS.OpenView (system_arc))
{
var header = arc.View.ReadBytes (0, 0x30);
Decrypt (header, 0, scheme.IndexKey);
using (var arc_file = ReadIndex (arc, header, scheme))
{
var sysenv = arc_file.Dir.FirstOrDefault (e => e.Name.Equals ("sysenv.tbl", StringComparison.InvariantCultureIgnoreCase));
if (null != sysenv)
{
var seed = ReadSysenvSeed (arc, sysenv, scheme.IndexKey);
return EncryptionScheme.GenerateContentKey (seed);
}
}
}
}
return scheme.IndexKey;
}
}
}

208
ArcFormats/AZSys/FastMersenneTwister.cs Normal file
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/**
* @brief SIMD oriented Fast Mersenne Twister(SFMT)
*
* @author Mutsuo Saito (Hiroshima University)
* @author Makoto Matsumoto (Hiroshima University)
*
* C# port by morkt
*
* Copyright (C) 2006, 2007 Mutsuo Saito, Makoto Matsumoto and Hiroshima University.
* Copyright (C) 2012 Mutsuo Saito, Makoto Matsumoto, Hiroshima University and The University of Tokyo.
* Copyright (C) 2013 Mutsuo Saito, Makoto Matsumoto and Hiroshima University.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the names of Hiroshima University, The University of
* Tokyo nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
namespace GameRes.Utility
{
public class FastMersenneTwister
{
const int MEXP = 19937;
const int N = MEXP / 128 + 1;
const int N32 = N * 4;
const int POS1 = 122;
const int SL1 = 18;
const int SL2 = 1;
const int SR1 = 11;
const int SR2 = 1;
const uint MSK1 = 0xdfffffefU;
const uint MSK2 = 0xddfecb7fU;
const uint MSK3 = 0xbffaffffU;
const uint MSK4 = 0xbffffff6U;
const uint PARITY1 = 0x00000001U;
const uint PARITY2 = 0x00000000U;
const uint PARITY3 = 0x00000000U;
const uint PARITY4 = 0x13c9e684U;
uint[,] m_state = new uint[N,4];
int m_idx;
public FastMersenneTwister (uint seed)
{
SRand (seed);
}
public void SRand (uint seed)
{
uint prev = m_state[0,0] = seed;
for (int i = 1; i < N32; i++)
{
int p = i >> 2;
int k = i & 3;
prev = (uint)(1812433253UL * (prev ^ (prev >> 30)) + (uint)i);
m_state[p,k] = prev;
}
m_idx = N32;
period_certification();
}
public uint GetRand32 ()
{
if (m_idx >= N32)
{
sfmt_gen_rand_all();
m_idx = 0;
}
uint r = m_state[m_idx >> 2, m_idx & 3];
m_idx++;
return r;
}
/// <summary>
/// This function fills the internal state array with pseudorandom integers.
/// </summary>
void sfmt_gen_rand_all ()
{
int i;
int r1 = N - 2;
int r2 = N - 1;
for (i = 0; i < N - POS1; i++)
{
do_recursion (i, i, i + POS1, r1, r2);
r1 = r2;
r2 = i;
}
for (; i < N; i++)
{
do_recursion (i, i, i + POS1 - N, r1, r2);
r1 = r2;
r2 = i;
}
}
/// <summary>
/// This function represents the recursion formula.
/// </summary>
void do_recursion (int r, int a, int b, int c, int d)
{
var x = new uint[4];
var y = new uint[4];
lshift128 (x, a, SL2);
rshift128 (y, c, SR2);
m_state[r,0] = m_state[a,0] ^ x[0] ^ ((m_state[b,0] >> SR1) & MSK1)
^ y[0] ^ (m_state[d,0] << SL1);
m_state[r,1] = m_state[a,1] ^ x[1] ^ ((m_state[b,1] >> SR1) & MSK2)
^ y[1] ^ (m_state[d,1] << SL1);
m_state[r,2] = m_state[a,2] ^ x[2] ^ ((m_state[b,2] >> SR1) & MSK3)
^ y[2] ^ (m_state[d,2] << SL1);
m_state[r,3] = m_state[a,3] ^ x[3] ^ ((m_state[b,3] >> SR1) & MSK4)
^ y[3] ^ (m_state[d,3] << SL1);
}
static readonly uint[] s_parity = { PARITY1, PARITY2, PARITY3, PARITY4 };
/// <summary>
/// This function certificate the period of 2^{MEXP}
/// </summary>
void period_certification ()
{
uint inner = 0;
int i;
for (i = 0; i < 4; i++)
inner ^= m_state[0,i] & s_parity[i];
for (i = 16; i > 0; i >>= 1)
inner ^= inner >> i;
inner &= 1;
/* check OK */
if (inner == 1)
return;
/* check NG, and modification */
for (i = 0; i < 4; i++)
{
uint work = 1;
for (int j = 0; j < 32; j++)
{
if ((work & s_parity[i]) != 0)
{
m_state[0,i] ^= work;
return;
}
work = work << 1;
}
}
}
/// <summary>
/// This function simulates SIMD 128-bit left shift.
/// The 128-bit integer referenced by idx is shifted by (shift * 8) bits.
/// This function simulates the LITTLE ENDIAN SIMD.
/// </summary>
/// <param name="result">the output of this function</param>
/// <param name="idx">index within state array of the 128-bit data to be shifted</param>
/// <param name="shift">the shift value</param>
void lshift128 (uint[] result, int idx, int shift)
{
ulong th = ((ulong)m_state[idx,3] << 32) | ((ulong)m_state[idx,2]);
ulong tl = ((ulong)m_state[idx,1] << 32) | ((ulong)m_state[idx,0]);
ulong oh = th << (shift * 8);
ulong ol = tl << (shift * 8);
oh |= tl >> (64 - shift * 8);
result[1] = (uint)(ol >> 32);
result[0] = (uint)ol;
result[3] = (uint)(oh >> 32);
result[2] = (uint)oh;
}
void rshift128 (uint[] result, int idx, int shift)
{
ulong th = ((ulong)m_state[idx,3] << 32) | ((ulong)m_state[idx,2]);
ulong tl = ((ulong)m_state[idx,1] << 32) | ((ulong)m_state[idx,0]);
ulong oh = th >> (shift * 8);
ulong ol = tl >> (shift * 8);
ol |= th << (64 - shift * 8);
result[1] = (uint)(ol >> 32);
result[0] = (uint)ol;
result[3] = (uint)(oh >> 32);
result[2] = (uint)oh;
}
}
}

183
ArcFormats/AZSys/ImageTYP1.cs Normal file
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//! \file ImageTYP1.cs
//! \date Thu Jan 14 18:45:18 2016
//! \brief AZ system image format implementation.
//
// Copyright (C) 2016 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Compression;
namespace GameRes.Formats.AZSys
{
internal class Typ1MetaData : CpbMetaData
{
public bool HasPalette;
}
[Export(typeof(ImageFormat))]
public class Typ1Format : ImageFormat
{
public override string Tag { get { return "CPB/TYP1"; } }
public override string Description { get { return "AZ system image format"; } }
public override uint Signature { get { return 0x31505954; } } // 'TYP1'
public Typ1Format ()
{
Extensions = new string[] { "cpb" };
}
public override ImageMetaData ReadMetaData (Stream stream)
{
stream.Position = 4;
int bpp = stream.ReadByte();
bool has_palette = stream.ReadByte() != 0;
using (var input = new ArcView.Reader (stream))
{
var info = new Typ1MetaData { BPP = bpp, HasPalette = has_palette };
info.Width = input.ReadUInt16();
info.Height = input.ReadUInt16();
input.ReadInt32();
info.Channel[0] = input.ReadUInt32();
info.Channel[1] = input.ReadUInt32();
info.Channel[2] = input.ReadUInt32();
info.Channel[3] = input.ReadUInt32();
return info;
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = (Typ1MetaData)info;
var reader = new Reader (stream, meta);
reader.Unpack();
return ImageData.Create (meta, reader.Format, reader.Palette, reader.Data);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("Typ1Format.Write not implemented");
}
internal class Reader
{
int m_width;
int m_height;
int m_bpp;
int m_pixel_size;
Stream m_input;
byte[] m_output;
uint[] m_channel;
public PixelFormat Format { get; private set; }
public BitmapPalette Palette { get; private set; }
public byte[] Data { get { return m_output; } }
public Reader (Stream input, Typ1MetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
m_bpp = info.BPP;
m_pixel_size = 8 == m_bpp ? 1 : 4;
m_channel = info.Channel;
m_output = new byte[m_width * m_height * m_pixel_size];
if (8 == m_bpp)
Format = info.HasPalette ? PixelFormats.Indexed8 : PixelFormats.Gray8;
else if (24 == m_bpp)
Format = PixelFormats.Bgr32;
else if (32 == m_bpp)
Format = PixelFormats.Bgra32;
else
throw new InvalidFormatException ("Invalid CPB color depth");
m_input = input;
if (info.HasPalette)
{
m_input.Position = 0x1E;
Palette = ReadPalette();
}
}
public BitmapPalette ReadPalette ()
{
var palette_data = new byte[0x400];
if (0x400 != m_input.Read (palette_data, 0, 0x400))
throw new InvalidFormatException();
var palette = new Color[0x100];
for (int i = 0; i < palette.Length; ++i)
{
int src = i * 4;
byte b = palette_data[src++];
byte g = palette_data[src++];
byte r = palette_data[src++];
palette[i] = Color.FromRgb (r, g, b);
}
return new BitmapPalette (palette);
}
public void Unpack ()
{
if (8 == m_bpp)
UnpackIndexed();
else
UnpackRGB();
}
void UnpackIndexed ()
{
if (null == Palette)
m_input.Position = 0x22;
else
m_input.Position = 0x422;
using (var input = new ZLibStream (m_input, CompressionMode.Decompress, true))
input.Read (m_output, 0, m_output.Length);
}
static byte[] StreamMap = new byte[] { 3, 2, 1, 0 };
static byte[] ChannelMap = new byte[] { 3, 0, 1, 2 };
void UnpackRGB ()
{
byte[] channel = new byte[m_width*m_height];
long start_pos = 0x1E;
for (int i = 0; i < 4; ++i)
{
if (0 == m_channel[StreamMap[i]])
continue;
m_input.Position = start_pos + 4; // skip crc32
using (var input = new ZLibStream (m_input, CompressionMode.Decompress, true))
{
int channel_size = input.Read (channel, 0, channel.Length);
int dst = ChannelMap[i];
for (int j = 0; j < channel_size; ++j)
{
m_output[dst] = channel[j];
dst += m_pixel_size;
}
}
start_pos += m_channel[StreamMap[i]];
}
}
}
}
}

5
ArcFormats/ArcFormats.csproj
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@ -66,6 +66,9 @@
<Compile Include="Amaterasu\ImageGRP.cs" /> <Compile Include="Amaterasu\ImageGRP.cs" />
<Compile Include="AnimeGameSystem\ArcDAT.cs" /> <Compile Include="AnimeGameSystem\ArcDAT.cs" />
<Compile Include="AnimeGameSystem\AudioPCM.cs" /> <Compile Include="AnimeGameSystem\AudioPCM.cs" />
<Compile Include="AZSys\ArcEncrypted.cs" />
<Compile Include="AZSys\FastMersenneTwister.cs" />
<Compile Include="AZSys\ImageTYP1.cs" />
<Compile Include="BlueGale\ArcSNN.cs" /> <Compile Include="BlueGale\ArcSNN.cs" />
<Compile Include="BlueGale\ImageZBM.cs" /> <Compile Include="BlueGale\ImageZBM.cs" />
<Compile Include="Cmvs\ArcCPZ.cs" /> <Compile Include="Cmvs\ArcCPZ.cs" />
@ -98,6 +101,8 @@
<Compile Include="Propeller\ImageMGR.cs" /> <Compile Include="Propeller\ImageMGR.cs" />
<Compile Include="Silky\ArcAi6Win.cs" /> <Compile Include="Silky\ArcAi6Win.cs" />
<Compile Include="Silky\ImageAKB.cs" /> <Compile Include="Silky\ImageAKB.cs" />
<Compile Include="Softpal\ArcVAFS.cs" />
<Compile Include="Softpal\ImageBPIC.cs" />
<Compile Include="StudioEgo\ArcPAK0.cs" /> <Compile Include="StudioEgo\ArcPAK0.cs" />
<Compile Include="StudioEgo\ImageANT.cs" /> <Compile Include="StudioEgo\ImageANT.cs" />
<Compile Include="TechnoBrain\ImageIPH.cs" /> <Compile Include="TechnoBrain\ImageIPH.cs" />

5
supported.html
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@ -303,10 +303,11 @@ Sakura Synchronicity<br/>
Shinsetsu Ryouki no Ori Dai 2 Shou<br/> Shinsetsu Ryouki no Ori Dai 2 Shou<br/>
</td></tr> </td></tr>
<tr class="odd"><td>*.elg</td><td><tt>ELG</tt></td><td>No</td></tr> <tr class="odd"><td>*.elg</td><td><tt>ELG</tt></td><td>No</td></tr>
<tr><td>*.arc</td><td><tt>ARC\x1a</tt></td><td>No</td><td rowspan="2">AZ System</td><td rowspan="2"> <tr><td>*.arc</td><td><tt>ARC\x1a</tt><br><tt>ARC</tt></td><td>No</td><td rowspan="2">AZ System</td><td rowspan="2">
Triptych<br/> Triptych<br/>
Tsurugi Otome Noah<br/>
</td></tr> </td></tr>
<tr><td>*.cpb</td><td><tt>CPB\x1a</tt></td><td>No</td></tr> <tr><td>*.cpb</td><td><tt>CPB\x1a</tt><br><tt>TYP1</tt></td><td>No</td></tr>
<tr class="odd"><td>*.mfg<br/>*.mfm<br/>*.mfs</td><td><tt>ALPF</tt></td><td>No</td><td rowspan="2">Silky's</td><td rowspan="2">Jokei Kazoku</td></tr> <tr class="odd"><td>*.mfg<br/>*.mfm<br/>*.mfs</td><td><tt>ALPF</tt></td><td>No</td><td rowspan="2">Silky's</td><td rowspan="2">Jokei Kazoku</td></tr>
<tr class="odd"><td>*</td><td><tt>MFG_</tt><br/><tt>MFGA</tt><br/><tt>MFGC</tt></td><td>No</td></tr> <tr class="odd"><td>*</td><td><tt>MFG_</tt><br/><tt>MFGA</tt><br/><tt>MFGC</tt></td><td>No</td></tr>
<tr><td>*.pmp<br/>*.pmw</td><td>-</td><td>Yes</td><td>ScenePlayer</td><td>Nyuujoku Hitozuma Jogakuen</td></tr> <tr><td>*.pmp<br/>*.pmw</td><td>-</td><td>Yes</td><td>ScenePlayer</td><td>Nyuujoku Hitozuma Jogakuen</td></tr>