implemented TAC archives.

ArcFormats/ArcFormats.csproj

@@ -346,6 +346,7 @@
     <Compile Include="TamaSoft\AudioESD.cs" />
     <Compile Include="TamaSoft\ImageBTN.cs" />
     <Compile Include="TamaSoft\ImageSUR.cs" />
+    <Compile Include="TanukiSoft\ArcTAC.cs" />
     <Compile Include="Taskforce\ArcDAT.cs" />
     <Compile Include="TechnoBrain\AudioWAPE.cs" />
     <Compile Include="TechnoBrain\ImageIPF.cs" />

ArcFormats/TanukiSoft/ArcTAC.cs

@@ -0,0 +1,167 @@
+//! \file       ArcTAC.cs
+//! \date       Wed Jan 25 04:41:35 2017
+//! \brief      TanukiSoft resource archive.
+//
+// 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;
+using System.Text;
+using GameRes.Compression;
+using GameRes.Cryptography;
+
+namespace GameRes.Formats.Tanuki
+{
+    [Export(typeof(ArchiveFormat))]
+    public class TacOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "TAC"; } }
+        public override string Description { get { return "TanukiSoft resource archive"; } }
+        public override uint     Signature { get { return 0x63724154; } } // 'TArc'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        static readonly byte[] IndexKey = Encoding.ASCII.GetBytes ("TLibArchiveData");
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int version;
+            if (file.View.AsciiEqual (4, "1.00"))
+                version = 100;
+            else if (file.View.AsciiEqual (4, "1.10"))
+                version = 110;
+            else
+                return null;
+            int count = file.View.ReadInt32 (0x14);
+            if (!IsSaneCount (count))
+                return null;
+
+            int bucket_count = file.View.ReadInt32 (0x18);
+            uint index_size = file.View.ReadUInt32 (0x1C);
+            long index_offset = version >= 110 ? 0x2C : 0x24;
+            long base_offset = index_offset + index_size;
+            var blowfish = new Blowfish (IndexKey);
+            var packed_bytes = file.View.ReadBytes (index_offset, index_size);
+            blowfish.Decipher (packed_bytes, packed_bytes.Length & ~7);
+
+            using (var input = new MemoryStream (packed_bytes))
+            using (var unpacked = new ZLibStream (input, CompressionMode.Decompress))
+            using (var index = new BinaryReader (unpacked))
+            {
+                var dir_table = new List<TacBucket> (bucket_count);
+                for (int i = 0; i < bucket_count; ++i)
+                {
+                    var entry = new TacBucket();
+                    entry.Hash = index.ReadUInt16();
+                    entry.Count = index.ReadUInt16();
+                    entry.Index = index.ReadInt32();
+                    dir_table.Add (entry);
+                }
+                var dir = new List<Entry> (count);
+                for (int i = 0; i < count; ++i)
+                {
+                    var entry = new TacEntry();
+                    entry.Hash = index.ReadUInt64();
+                    entry.IsPacked = index.ReadInt32() != 0;
+                    entry.UnpackedSize = index.ReadUInt32();
+                    entry.Offset = base_offset + index.ReadUInt32();
+                    entry.Size = index.ReadUInt32();
+                    if (!entry.CheckPlacement (file.MaxOffset))
+                        return null;
+                    dir.Add (entry);
+                }
+                var buffer = new byte[8];
+                foreach (var bucket in dir_table)
+                {
+                    for (int i = 0; i < bucket.Count; ++i)
+                    {
+                        var entry = dir[bucket.Index+i] as TacEntry;
+                        entry.Hash = entry.Hash << 16 | bucket.Hash;
+                        entry.Name = string.Format ("{0:X16}", entry.Hash);
+                        if (entry.IsPacked)
+                            continue;
+                        entry.Key = Encoding.ASCII.GetBytes (string.Format ("{0}_tlib_secure_", entry.Hash));
+                        var bf = new Blowfish (entry.Key);
+                        file.View.Read (entry.Offset, buffer, 0, 8);
+                        bf.Decipher (buffer, 8);
+                        var res = AutoEntry.DetectFileType (buffer.ToUInt32 (0));
+                        if (res != null)
+                            entry.ChangeType (res);
+                        if ("image" == entry.Type)
+                            entry.EncryptedSize = Math.Min (10240, entry.Size);
+                        else
+                            entry.EncryptedSize = entry.Size;
+                    }
+                }
+                return new ArcFile (file, this, dir);
+            }
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var tent = entry as TacEntry;
+            if (null == tent)
+                return base.OpenEntry (arc, entry);
+            if (tent.IsPacked)
+            {
+                var input = arc.File.CreateStream (entry.Offset, entry.Size);
+                return new ZLibStream (input, CompressionMode.Decompress);
+            }
+            var bf = new Blowfish (tent.Key);
+            if (tent.EncryptedSize < tent.Size)
+            {
+                var header = arc.File.View.ReadBytes (tent.Offset, tent.EncryptedSize);
+                bf.Decipher (header, header.Length);
+                var rest = arc.File.CreateStream (tent.Offset+tent.EncryptedSize, tent.Size-tent.EncryptedSize);
+                return new PrefixStream (header, rest);
+            }
+            else if (0 == (tent.Size & 7))
+            {
+                var input = arc.File.CreateStream (tent.Offset, tent.Size);
+                return new InputCryptoStream (input, bf.CreateDecryptor());
+            }
+            else
+            {
+                var data = arc.File.View.ReadBytes (tent.Offset, tent.Size);
+                bf.Decipher (data, data.Length & ~7);
+                return new BinMemoryStream (data);
+            }
+        }
+    }
+
+    internal class TacEntry : PackedEntry
+    {
+        public ulong    Hash;
+        public byte[]   Key;
+        public uint     EncryptedSize;
+    }
+
+    internal class TacBucket
+    {
+        public ushort   Hash;
+        public int      Count;
+        public int      Index;
+    }
+}

supported.html

@@ -1375,6 +1375,10 @@ femme fatale<br/>
 Kidou Houshinki<br/>
 </td></tr>
 <tr><td class="last">*.pcd</td><td>-</td><td>No</td></tr>
+<tr class="odd"><td>*.tac</td><td><tt>TArc1.10</tt><br/><tt>TArc1.00</tt></td><td>No</td><td>TanukiSoft</td><td>
+Shoujo Kyouiku<br/>
+Shoukoujo<br/>
+</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>