implemented PKG archive variation.

This commit is contained in:
morkt 2017-04-12 04:17:24 +04:00
parent 2d41224b6e
commit 3203e48d83
3 changed files with 155 additions and 1 deletions

View File

@ -548,6 +548,7 @@
<Compile Include="Xuse\ArcXuse.cs" /> <Compile Include="Xuse\ArcXuse.cs" />
<Compile Include="YaneSDK\ArcDAT.cs" /> <Compile Include="YaneSDK\ArcDAT.cs" />
<Compile Include="Yatagarasu\ArcPKG.cs" /> <Compile Include="Yatagarasu\ArcPKG.cs" />
<Compile Include="Yatagarasu\ArcPKG2.cs" />
<Compile Include="Youkai\ArcDAT.cs" /> <Compile Include="Youkai\ArcDAT.cs" />
<Compile Include="Yox\ArcYOX.cs" /> <Compile Include="Yox\ArcYOX.cs" />
<Compile Include="Yuka\ArcYKC.cs" /> <Compile Include="Yuka\ArcYKC.cs" />

View File

@ -23,7 +23,6 @@
// IN THE SOFTWARE. // IN THE SOFTWARE.
// //
using System;
using System.Collections.Generic; using System.Collections.Generic;
using System.ComponentModel.Composition; using System.ComponentModel.Composition;
using System.IO; using System.IO;

View File

@ -0,0 +1,154 @@
//! \file ArcPKG2.cs
//! \date Wed Apr 12 03:03:20 2017
//! \brief Yatagarasu resource archive with different encryption method.
//
// 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 System.ComponentModel.Composition;
using System.IO;
using System.Linq;
namespace GameRes.Formats.Yatagarasu
{
[Export(typeof(ArchiveFormat))]
public class Pkg2Opener : ArchiveFormat
{
public override string Tag { get { return "PKG/2"; } }
public override string Description { get { return "Yatagarasu resource archive v2"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.HasExtension (".pkg"))
return null;
uint first_key = file.View.ReadUInt32 (0) ^ (uint)file.MaxOffset;
foreach (var key in KnownKeys.Values.Where (k => k[0] == first_key))
{
int count = (int)(file.View.ReadUInt32 (4) ^ key[0]);
if (!IsSaneCount (count))
continue;
try
{
var arc = ReadIndex (file, key, count);
if (arc != null)
return arc;
}
catch { /* ignore parse errors caused by incorrect key */ }
}
return null;
}
ArcFile ReadIndex (ArcView file, uint[] key, int count)
{
using (var input = file.CreateStream (8, (uint)count * 0x80u))
using (var dec = new ByteStringEncryptedStream (input, GetKeyBytes (key)))
using (var index = new BinaryStream (dec, file.Name))
{
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = index.ReadCString (0x74);
if (0 == name.Length)
return null;
var entry = FormatCatalog.Instance.Create<Pkg2Entry> (name);
entry.Size = index.ReadUInt32();
entry.Offset = index.ReadUInt32();
entry.EncryptedSize = index.ReadUInt32();
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
return new Pkg2Archive (file, this, dir, key);
}
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var pkg_arc = (Pkg2Archive)arc;
var pkg_ent = (Pkg2Entry)entry;
var data = new byte[(pkg_ent.Size + 3) & ~3];
arc.File.View.Read (pkg_ent.Offset, data, 0, pkg_ent.Size);
uint encrypted_size = pkg_ent.EncryptedSize;
if (0 == encrypted_size || encrypted_size > pkg_ent.Size)
encrypted_size = pkg_ent.Size;
unsafe
{
fixed (byte* data8 = data)
{
uint* data32 = (uint*)data8;
uint count = (encrypted_size + 3) / 4;
uint mask = (entry.Size / 4) & 7;
for (uint i = 0; i < count; ++i)
data32[i] ^= pkg_arc.Key[i & mask];
}
}
return new BinMemoryStream (data, 0, (int)entry.Size);
}
static byte[] GetKeyBytes (uint[] key)
{
var bytes = new byte[sizeof(uint) * key.Length];
Buffer.BlockCopy (key, 0, bytes, 0, bytes.Length);
return bytes;
}
PkgScheme m_scheme = new PkgScheme { KnownKeys = new Dictionary<string, uint[]>() };
public IDictionary<string, uint[]> KnownKeys
{
get { return m_scheme.KnownKeys; }
}
public override ResourceScheme Scheme
{
get { return m_scheme; }
set { m_scheme = (PkgScheme)value; }
}
}
internal class Pkg2Archive : ArcFile
{
public readonly uint[] Key;
public Pkg2Archive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, uint[] key)
: base (arc, impl, dir)
{
Key = key;
}
}
internal class Pkg2Entry : Entry
{
public uint EncryptedSize;
}
[Serializable]
public class PkgScheme : ResourceScheme
{
public IDictionary<string, uint[]> KnownKeys;
}
}