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(malie): generalized encryption handling.

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This commit is contained in:
morkt 2017-06-06 23:22:19 +04:00
parent 2d186edb39
commit da3403339e
5 changed files with 319 additions and 163 deletions
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2
ArcFormats/ArcFormats.csproj
View File

@ -114,6 +114,8 @@
<Compile Include="Kurumi\ImageGRA.cs" />
<Compile Include="Leaf\ArcPX.cs" />
<Compile Include="Malie\ArcLIBU.cs" />
<Compile Include="Malie\LibScheme.cs" />
<Compile Include="Malie\MalieEncryption.cs" />
<Compile Include="MicroVision\ArcARC.cs" />
<Compile Include="MicroVision\ArcGSD.cs" />
<Compile Include="MicroVision\AudioIKM.cs" />

184
ArcFormats/Malie/ArcLIB.cs
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@ -27,8 +27,6 @@ using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Text;
using GameRes.Cryptography;
using GameRes.Utility;
namespace GameRes.Formats.Malie
@ -115,46 +113,15 @@ namespace GameRes.Formats.Malie
public class MalieArchive : ArcFile
{
public readonly Camellia Encryption;
public readonly IMalieDecryptor Decryptor;
public MalieArchive (ArcView file, ArchiveFormat format, ICollection<Entry> dir, Camellia encryption)
public MalieArchive (ArcView file, ArchiveFormat format, ICollection<Entry> dir, IMalieDecryptor decr)
: base (file, format, dir)
{
Encryption = encryption;
Decryptor = decr;
}
}
[Serializable]
public class LibScheme
{
public uint DataAlign;
public uint[] Key;
public LibScheme (uint[] key) : this (0x1000, key)
{
}
public LibScheme (uint align, uint[] key)
{
DataAlign = align;
Key = key;
}
public LibScheme (string key) : this (Camellia.GenerateKey (key))
{
}
public LibScheme (uint align, string key) : this (align, Camellia.GenerateKey (key))
{
}
}
[Serializable]
public class MalieScheme : ResourceScheme
{
public Dictionary<string, LibScheme> KnownSchemes;
}
[Export(typeof(ArchiveFormat))]
public class DatOpener : ArchiveFormat
{
@ -167,6 +134,7 @@ namespace GameRes.Formats.Malie
public DatOpener ()
{
Extensions = new string[] { "lib", "dat" };
Signatures = new uint[] { 0, 0x3F503FB1 };
}
public override ArcFile TryOpen (ArcView file)
@ -176,19 +144,19 @@ namespace GameRes.Formats.Malie
var header = new byte[0x10];
foreach (var scheme in KnownSchemes.Values)
{
var encryption = new Camellia (scheme.Key);
ReadEncrypted (file.View, encryption, 0, header, 0, 0x10);
var decryptor = scheme.CreateDecryptor();
ReadEncrypted (file.View, decryptor, 0, header, 0, 0x10);
ILibIndexReader reader;
if (Binary.AsciiEqual (header, 0, "LIBP"))
reader = new LibPReader (file, encryption, header, scheme);
reader = new LibPReader (file, decryptor, header, scheme);
else if (Binary.AsciiEqual (header, 0, "LIBU"))
reader = LibUReader.Create (file, encryption);
reader = LibUReader.Create (file, decryptor);
else
continue;
using (reader)
{
if (reader.ReadIndex())
return new MalieArchive (file, this, reader.Dir, encryption);
return new MalieArchive (file, this, reader.Dir, decryptor);
}
}
return null;
@ -199,25 +167,25 @@ namespace GameRes.Formats.Malie
var march = arc as MalieArchive;
if (null == march)
return arc.File.CreateStream (entry.Offset, entry.Size);
var input = new EncryptedStream (march.File, march.Encryption);
var input = new EncryptedStream (march.File, march.Decryptor);
return new StreamRegion (input, entry.Offset, entry.Size);
}
internal abstract class LibIndexReader : ILibIndexReader
{
protected ArcView.Frame m_view;
protected readonly long m_max_offset;
protected Camellia m_enc;
protected List<Entry> m_dir = new List<Entry>();
protected byte[] m_header;
protected ArcView.Frame m_view;
protected readonly long m_max_offset;
protected IMalieDecryptor m_dec;
protected List<Entry> m_dir = new List<Entry>();
protected byte[] m_header;
public List<Entry> Dir { get { return m_dir; } }
protected LibIndexReader (ArcView file, Camellia encryption, byte[] header)
protected LibIndexReader (ArcView file, IMalieDecryptor decryptor, byte[] header)
{
m_view = file.View;
m_max_offset = file.MaxOffset;
m_enc = encryption;
m_dec = decryptor;
m_header = header;
}
@ -243,8 +211,8 @@ namespace GameRes.Formats.Malie
long m_data_align;
uint[] m_offset_table;
public LibPReader (ArcView file, Camellia encryption, byte[] header, LibScheme scheme)
: base (file, encryption, header)
public LibPReader (ArcView file, IMalieDecryptor decryptor, byte[] header, LibScheme scheme)
: base (file, decryptor, header)
{
m_base_offset = 0;
m_data_align = scheme.DataAlign - 1;
@ -261,10 +229,10 @@ namespace GameRes.Formats.Malie
var offsets = new byte[4 * offset_count];
m_base_offset += 0x10;
if (m_index.Length != ReadEncrypted (m_view, m_enc, m_base_offset, m_index, 0, m_index.Length))
if (m_index.Length != ReadEncrypted (m_view, m_dec, m_base_offset, m_index, 0, m_index.Length))
return false;
m_base_offset += m_index.Length;
if (offsets.Length != ReadEncrypted (m_view, m_enc, m_base_offset, offsets, 0, offsets.Length))
if (offsets.Length != ReadEncrypted (m_view, m_dec, m_base_offset, offsets, 0, offsets.Length))
return false;
m_offset_table = new uint[offset_count];
Buffer.BlockCopy (offsets, 0, m_offset_table, 0, offsets.Length);
@ -306,7 +274,7 @@ namespace GameRes.Formats.Malie
}
}
private static int ReadEncrypted (ArcView.Frame view, Camellia enc, long offset, byte[] buffer, int index, int length)
private static int ReadEncrypted (ArcView.Frame view, IMalieDecryptor dec, long offset, byte[] buffer, int index, int length)
{
int offset_pad = (int)offset & 0xF;
int aligned_len = (offset_pad + length + 0xF) & ~0xF;
@ -328,7 +296,7 @@ namespace GameRes.Formats.Malie
for (int block_count = aligned_len / 0x10; block_count > 0; --block_count)
{
enc.DecryptBlock (offset, aligned_buf, block);
dec.DecryptBlock (offset, aligned_buf, block);
block += 0x10;
offset += 0x10;
}
@ -345,110 +313,4 @@ namespace GameRes.Formats.Malie
set { KnownSchemes = ((MalieScheme)value).KnownSchemes; }
}
}
internal class EncryptedStream : Stream
{
ArcView.Frame m_view;
Camellia m_enc;
long m_max_offset;
long m_position = 0;
byte[] m_current_block = new byte[BlockLength];
int m_current_block_length = 0;
long m_current_block_position = 0;
public const int BlockLength = 0x1000;
public Camellia Encryption { get { return m_enc; } }
public EncryptedStream (ArcView mmap, Camellia encryption)
{
m_view = mmap.CreateFrame();
m_enc = encryption;
m_max_offset = mmap.MaxOffset;
}
public override int Read (byte[] buf, int index, int count)
{
int total_read = 0;
bool refill_buffer = !(m_position >= m_current_block_position && m_position < m_current_block_position + m_current_block_length);
while (count > 0 && m_position < m_max_offset)
{
if (refill_buffer)
{
m_current_block_position = m_position & ~((long)BlockLength-1);
FillBuffer();
}
int src_offset = (int)m_position & (BlockLength-1);
int available = Math.Min (count, m_current_block_length - src_offset);
Buffer.BlockCopy (m_current_block, src_offset, buf, index, available);
m_position += available;
total_read += available;
index += available;
count -= available;
refill_buffer = true;
}
return total_read;
}
private void FillBuffer ()
{
m_current_block_length = m_view.Read (m_current_block_position, m_current_block, 0, (uint)BlockLength);
for (int offset = 0; offset < m_current_block_length; offset += 0x10)
{
m_enc.DecryptBlock (m_current_block_position+offset, m_current_block, offset);
}
}
#region IO.Stream methods
public override bool CanRead { get { return !m_disposed; } }
public override bool CanWrite { get { return false; } }
public override bool CanSeek { get { return !m_disposed; } }
public override long Length { get { return m_max_offset; } }
public override long Position
{
get { return m_position; }
set { m_position = value; }
}
public override long Seek (long pos, SeekOrigin whence)
{
if (SeekOrigin.Current == whence)
m_position += pos;
else if (SeekOrigin.End == whence)
m_position = m_max_offset + pos;
else
m_position = pos;
return m_position;
}
public override void Write (byte[] buf, int index, int count)
{
throw new NotSupportedException();
}
public override void SetLength (long length)
{
throw new NotSupportedException();
}
public override void Flush ()
{
}
#endregion
#region IDisposable methods
bool m_disposed = false;
protected override void Dispose (bool disposing)
{
if (!m_disposed)
{
if (disposing)
m_view.Dispose();
m_disposed = true;
base.Dispose();
}
}
#endregion
}
}

4
ArcFormats/Malie/ArcLIBU.cs
View File

@ -77,9 +77,9 @@ namespace GameRes.Formats.Malie
return new LibUReader (input);
}
public static LibUReader Create (ArcView file, Camellia encryption)
public static LibUReader Create (ArcView file, IMalieDecryptor decryptor)
{
var input = new EncryptedStream (file, encryption);
var input = new EncryptedStream (file, decryptor);
return new LibUReader (input);
}

94
ArcFormats/Malie/LibScheme.cs Normal file
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@ -0,0 +1,94 @@
//! \file LibScheme.cs
//! \date Tue Jun 06 22:47:22 2017
//! \brief Malie encryption schemes.
//
// Copyright (C) 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 GameRes.Cryptography;
namespace GameRes.Formats.Malie
{
[Serializable]
public abstract class LibScheme
{
public uint DataAlign;
public LibScheme (uint align)
{
DataAlign = align;
}
public abstract IMalieDecryptor CreateDecryptor ();
}
[Serializable]
public class LibCamelliaScheme : LibScheme
{
public uint[] Key { get; set; }
public LibCamelliaScheme (uint[] key) : this (0x1000, key)
{
}
public LibCamelliaScheme (uint align, uint[] key) : base (align)
{
Key = key;
}
public LibCamelliaScheme (string key) : this (Camellia.GenerateKey (key))
{
}
public LibCamelliaScheme (uint align, string key) : this (align, Camellia.GenerateKey (key))
{
}
public override IMalieDecryptor CreateDecryptor ()
{
return new CamelliaDecryptor (Key);
}
}
[Serializable]
public class LibCfiScheme : LibScheme
{
public byte[] Key { get; set; }
public LibCfiScheme (uint align, byte[] key) : base (align)
{
Key = key;
}
public override IMalieDecryptor CreateDecryptor ()
{
return new CfiDecryptor (Key);
}
}
[Serializable]
public class MalieScheme : ResourceScheme
{
public Dictionary<string, LibScheme> KnownSchemes;
}
}

198
ArcFormats/Malie/MalieEncryption.cs Normal file
View File

@ -0,0 +1,198 @@
//! \file MalieEncryption.cs
//! \date Tue Jun 06 20:38:57 2017
//! \brief Malie System encryption implementation.
//
// Copyright (C) 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.IO;
using GameRes.Cryptography;
using GameRes.Utility;
namespace GameRes.Formats.Malie
{
public interface IMalieDecryptor
{
void DecryptBlock (long block_offset, byte[] buffer, int index);
}
public class CamelliaDecryptor : IMalieDecryptor
{
Camellia m_enc;
public CamelliaDecryptor (uint[] key)
{
m_enc = new Camellia (key);
}
public void DecryptBlock (long block_offset, byte[] buffer, int index)
{
m_enc.DecryptBlock (block_offset, buffer, index);
}
}
public class CfiDecryptor : IMalieDecryptor
{
byte[] m_key;
public CfiDecryptor (byte[] key)
{
m_key = key;
}
public void DecryptBlock (long block_offset, byte[] data, int index)
{
if (index < 0 || index + 0x10 > data.Length)
throw new ArgumentOutOfRangeException ("index");
int offset = (int)block_offset;
int o = offset & 0xF;
byte first = data[index+o];
for (int i = 0; i < 0x10; ++i)
{
if (o != i)
data[index+i] ^= first;
}
offset >>= 4;
unsafe
{
fixed (byte* data8 = &data[index])
{
uint* data32 = (uint*)data8;
uint k = Binary.RotR (0x39653542, m_key[offset & 0x1F] ^ 0xA5);
data32[0] = Binary.RotR (data32[0] ^ k, m_key[(offset + 12) & 0x1F] ^ 0xA5);
k = Binary.RotL (0x76706367, m_key[(offset + 3) & 0x1F] ^ 0xA5);
data32[1] = Binary.RotL (data32[1] ^ k, m_key[(offset + 15) & 0x1F] ^ 0xA5);
k = Binary.RotR (0x69454462, m_key[(offset + 6) & 0x1F] ^ 0xA5);
data32[2] = Binary.RotR (data32[2] ^ k, m_key[(offset - 14) & 0x1F] ^ 0xA5);
k = Binary.RotL (0x71334334, m_key[(offset + 9) & 0x1F] ^ 0xA5);
data32[3] = Binary.RotL (data32[3] ^ k, m_key[(offset - 11) & 0x1F] ^ 0xA5);
}
}
}
}
internal class EncryptedStream : Stream
{
ArcView.Frame m_view;
IMalieDecryptor m_dec;
long m_max_offset;
long m_position = 0;
byte[] m_current_block = new byte[BlockLength];
int m_current_block_length = 0;
long m_current_block_position = 0;
public const int BlockLength = 0x1000;
public IMalieDecryptor Decryptor { get { return m_dec; } }
public EncryptedStream (ArcView mmap, IMalieDecryptor decryptor)
{
m_view = mmap.CreateFrame();
m_dec = decryptor;
m_max_offset = mmap.MaxOffset;
}
public override int Read (byte[] buf, int index, int count)
{
int total_read = 0;
bool refill_buffer = !(m_position >= m_current_block_position && m_position < m_current_block_position + m_current_block_length);
while (count > 0 && m_position < m_max_offset)
{
if (refill_buffer)
{
m_current_block_position = m_position & ~((long)BlockLength-1);
FillBuffer();
}
int src_offset = (int)m_position & (BlockLength-1);
int available = Math.Min (count, m_current_block_length - src_offset);
Buffer.BlockCopy (m_current_block, src_offset, buf, index, available);
m_position += available;
total_read += available;
index += available;
count -= available;
refill_buffer = true;
}
return total_read;
}
private void FillBuffer ()
{
m_current_block_length = m_view.Read (m_current_block_position, m_current_block, 0, (uint)BlockLength);
for (int offset = 0; offset < m_current_block_length; offset += 0x10)
{
m_dec.DecryptBlock (m_current_block_position+offset, m_current_block, offset);
}
}
#region IO.Stream methods
public override bool CanRead { get { return !m_disposed; } }
public override bool CanWrite { get { return false; } }
public override bool CanSeek { get { return !m_disposed; } }
public override long Length { get { return m_max_offset; } }
public override long Position
{
get { return m_position; }
set { m_position = value; }
}
public override long Seek (long pos, SeekOrigin whence)
{
if (SeekOrigin.Current == whence)
m_position += pos;
else if (SeekOrigin.End == whence)
m_position = m_max_offset + pos;
else
m_position = pos;
return m_position;
}
public override void Write (byte[] buf, int index, int count)
{
throw new NotSupportedException();
}
public override void SetLength (long length)
{
throw new NotSupportedException();
}
public override void Flush ()
{
}
#endregion
#region IDisposable methods
bool m_disposed = false;
protected override void Dispose (bool disposing)
{
if (!m_disposed)
{
if (disposing)
m_view.Dispose();
m_disposed = true;
base.Dispose();
}
}
#endregion
}
}