another AbogadoPowers archive format.

ArcFormats/Abogado/ArcPAK.cs

@@ -0,0 +1,125 @@
+//! \file       ArcPAK.cs
+//! \date       2018 Apr 10
+//! \brief      AbogadoPowers resource archive.
+//
+// Copyright (C) 2018 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;
+
+namespace GameRes.Formats.Abogado
+{
+    internal class Fs8Archive : ArcFile
+    {
+        public Fs8Archive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir)
+            : base (arc, impl, dir)
+        {
+        }
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class PakOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "PAK/ABOGADO"; } }
+        public override string Description { get { return "AbogadoPowers resource archive"; } }
+        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)
+        {
+            int count = file.View.ReadInt16 (0);
+            if (!IsSaneCount (count))
+                return null;
+            int encryption = file.View.ReadInt16 (2);
+            if (encryption < 0 || encryption > 1)
+                return null;
+
+            uint index_offset = 4;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var name = file.View.ReadString (index_offset, 0x40);
+                if (string.IsNullOrWhiteSpace (name))
+                    return null;
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = file.View.ReadUInt32 (index_offset+0x40);
+                entry.Size   = file.View.ReadUInt32 (index_offset+0x44);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += 0x48;
+            }
+            if (encryption != 0)
+                return new Fs8Archive (file, this, dir);
+            else
+                return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var input = arc.File.CreateStream (entry.Offset, entry.Size);
+            if (!(arc is Fs8Archive))
+                return input;
+            var enc_offset = entry.Offset + entry.Size;
+            int key = arc.File.View.ReadInt32 (enc_offset);
+            if (key < 0 || key >= DefaultKeys.Value.Length)
+                return input;
+            using (input)
+            {
+                var data = input.ReadBytes ((int)entry.Size);
+                FsDecrypt (data, DefaultKeys.Value[key]);
+                return new BinMemoryStream (data, entry.Name);
+            }
+        }
+
+        void FsDecrypt (byte[] data, byte[] key)
+        {
+            for (int i = 0; i < data.Length; ++i)
+            {
+                data[i] = key[data[i]];
+            }
+        }
+
+        static readonly Lazy<byte[][]> DefaultKeys = new Lazy<byte[][]> (LoadKeys);
+
+        static byte[][] LoadKeys ()
+        {
+            using (var input = EmbeddedResource.Open ("keytable.dat", typeof (PakOpener)))
+            {
+                if (null == input)
+                    return Array.Empty<byte[]>();
+                var keys = new List<byte[]> (128);
+                for (int i = 0; i < 128; ++i)
+                {
+                    var k = new byte[256];
+                    if (input.Read (k, 0, 256) != 256)
+                        break;
+                    keys.Add (k);
+                }
+                return keys.ToArray();
+            }
+        }
+    }
+}

ArcFormats/ArcFormats.csproj

@@ -89,6 +89,7 @@
     <Compile Include="Abel\ImageCBF.cs" />
     <Compile Include="Abel\ImageGPS.cs" />
     <Compile Include="Abogado\ArcDSK.cs" />
+    <Compile Include="Abogado\ArcPAK.cs" />
     <Compile Include="Abogado\AudioADP.cs" />
     <Compile Include="Abogado\ImageKG.cs" />
     <Compile Include="Actgs\ArcCG.cs" />
@@ -138,8 +139,10 @@
     <Compile Include="DjSystem\ArcDAT.cs" />
     <Compile Include="elf\ArcAi5DAT.cs" />
     <Compile Include="elf\ImageRMT.cs" />
+    <Compile Include="EmbeddedResource.cs" />
     <Compile Include="Emote\ImageDREF.cs" />
     <Compile Include="FC01\ArcPAK.cs" />
+    <Compile Include="FC01\ImageWM2.cs" />
     <Compile Include="FC01\ImageWMK.cs" />
     <Compile Include="FrontWing\ArcVAV.cs" />
     <Compile Include="Groover\ArcPCG.cs" />
@@ -660,6 +663,7 @@
     <Compile Include="Vitamin\ImageSBI.cs" />
     <Compile Include="VnEngine\ArcAXR.cs" />
     <Compile Include="VnEngine\ImageZAW.cs" />
+    <EmbeddedResource Include="Abogado\keytable.dat" />
     <None Include="packages.config" />
     <EmbeddedResource Include="Strings\arcStrings.ja-JP.resx" />
     <EmbeddedResource Include="Unity\strings.dat" />