implemented BIN+IDX archives.

ArcFormats/ArcFormats.csproj

@@ -244,6 +244,7 @@
     <Compile Include="Nekopunch\ImagePBM.cs" />
     <Compile Include="Nexas\ArcTPF.cs" />
     <Compile Include="LiveMaker\ImageGALX.cs" />
+    <Compile Include="Nonono\ArcNPF.cs" />
     <Compile Include="Origin\ArcDAT.cs" />
     <Compile Include="Otemoto\ArcTLZ.cs" />
     <Compile Include="Otemoto\ImageMAG.cs" />
@@ -748,6 +749,7 @@
     <Compile Include="Rits\ArcSAF.cs" />
     <Compile Include="BlackCyc\ArcVPK.cs" />
     <Compile Include="Unity\ArcASSET.cs" />
+    <Compile Include="Unity\ArcBIN.cs" />
     <Compile Include="Unity\ArcSpVM.cs" />
     <Compile Include="Unity\ArcUnityFS.cs" />
     <Compile Include="Unity\Asset.cs" />

ArcFormats/Unity/ArcBIN.cs

@@ -0,0 +1,247 @@
+//! \file       ArcBIN.cs
+//! \date       2019 Feb 23
+//! \brief      Unity binary data asset.
+//
+// Copyright (C) 2019 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;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Unity
+{
+    internal class BinArchive : ArcFile
+    {
+        public readonly Aes Encryption;
+
+        public BinArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, Aes enc)
+            : base (arc, impl, dir)
+        {
+            Encryption = enc;
+        }
+
+        #region IDisposable Members
+        bool _bin_disposed = false;
+        protected override void Dispose (bool disposing)
+        {
+            if (_bin_disposed)
+                return;
+
+            if (disposing)
+                Encryption.Dispose();
+            _bin_disposed = true;
+            base.Dispose (disposing);
+        }
+        #endregion
+    }
+
+    [Serializable]
+    public class BinPackKey
+    {
+        public byte[]   Key;
+        public byte[]   IV;
+
+        public BinPackKey (string key, string iv)
+        {
+            Key = Encoding.UTF8.GetBytes (key);
+            IV  = Encoding.UTF8.GetBytes (iv);
+        }
+    }
+
+    [Serializable]
+    public class BinPackScheme : ResourceScheme
+    {
+        public Dictionary<string, BinPackKey>   KnownKeys;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class BinOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "BIN/IDX"; } }
+        public override string Description { get { return "Unity engine resource asset"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return true; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.Name.HasExtension (".bin"))
+                return null;
+            var idx_name = Path.ChangeExtension (file.Name, "idx");
+            if (!VFS.FileExists (idx_name))
+                return null;
+            var scheme = QueryScheme (file.Name);
+            if (null == scheme)
+                return null;
+            var dir = new List<Entry>();
+            using (var idx = VFS.OpenBinaryStream (idx_name))
+            using (var aes = Aes.Create())
+            {
+                aes.Padding = PaddingMode.PKCS7;
+                aes.Mode = CipherMode.CBC;
+                aes.KeySize = 128;
+                aes.Key = scheme.Key;
+                aes.IV = scheme.IV;
+                var input_buffer = new byte[0x100];
+                var unpacker = new BinDeserializer();
+                while (idx.PeekByte() != -1)
+                {
+                    int length = idx.ReadInt32();
+                    if (length <= 0)
+                        return null;
+                    if (length > input_buffer.Length)
+                        input_buffer = new byte[length];
+                    if (idx.Read (input_buffer, 0, length) < length)
+                        return null;
+                    using (var decryptor = aes.CreateDecryptor())
+                    using (var encrypted = new MemoryStream (input_buffer, 0, length))
+                    using (var input = new InputCryptoStream (encrypted, decryptor))
+                    {
+                        var info = unpacker.DeserializeEntry (input);
+                        var filename = info["fileName"] as string;
+                        if (string.IsNullOrEmpty (filename))
+                            return null;
+                        filename = filename.TrimStart ('/', '\\');
+                        var entry = Create<Entry> (filename);
+                        entry.Offset = Convert.ToInt64 (info["index"]);
+                        entry.Size   = Convert.ToUInt32 (info["size"]);
+                        if (!entry.CheckPlacement (file.MaxOffset))
+                            return null;
+                        dir.Add (entry);
+                    }
+                }
+            }
+            if (0 == dir.Count)
+                return null;
+            var arc_aes = Aes.Create();
+            arc_aes.Padding = PaddingMode.PKCS7;
+            arc_aes.Mode = CipherMode.CBC;
+            arc_aes.KeySize = 256;
+            arc_aes.Key = scheme.Key;
+            arc_aes.IV = scheme.IV;
+            return new BinArchive (file, this, dir, arc_aes);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var bin_arc = (BinArchive)arc;
+            var decryptor = bin_arc.Encryption.CreateDecryptor();
+            var input = arc.File.CreateStream (entry.Offset, entry.Size);
+            return new InputCryptoStream (input, decryptor);
+        }
+
+        BinPackKey QueryScheme (string arc_name)
+        {
+            return DefaultScheme.KnownKeys.Values.FirstOrDefault();
+        }
+
+        static BinPackScheme DefaultScheme = new BinPackScheme { KnownKeys = new Dictionary<string, BinPackKey>() };
+
+        public override ResourceScheme Scheme
+        {
+            get { return DefaultScheme; }
+            set { DefaultScheme = (BinPackScheme)value; }
+        }
+    }
+
+    internal class BinDeserializer
+    {
+        byte[] m_buffer = new byte[0x20];
+
+        public IDictionary DeserializeEntry (Stream input)
+        {
+            int id = input.ReadByte();
+            if (id < 0x80 || id > 0x8F)
+                throw new FormatException();
+            int field_count = id & 0xF;
+            var map = new Hashtable (field_count);
+            for (int i = 0; i < field_count; ++i)
+            {
+                id = input.ReadByte();
+                if (id < 0xA0 || id > 0xBF)
+                    throw new FormatException();
+                int length = id & 0x1F;
+                if (input.Read (m_buffer, 0, length) < length)
+                    throw new FormatException();
+                var key = Encoding.UTF8.GetString (m_buffer, 0, length);
+                var value = ReadField (input);
+                map[key] = value;
+            }
+            return map;
+        }
+
+        object ReadField (Stream input)
+        {
+            int id = input.ReadByte();
+            if (id >= 0 && id < 0x80)
+            {
+                return id;
+            }
+            else if (id >= 0xA0 && id < 0xC0)
+            {
+                int length = id & 0x1F;
+                return ReadString (input, length);
+            }
+            switch (id)
+            {
+            case 0xD0: // Int8
+                int value = input.ReadByte();
+                if (-1 == value)
+                    throw new FormatException();
+                return (sbyte)value;
+
+            case 0xD1: // Int16
+                if (input.Read (m_buffer, 0, 2) < 2)
+                    throw new FormatException();
+                return BigEndian.ToInt16 (m_buffer, 0);
+
+            case 0xD2: // Int32
+                if (input.Read (m_buffer, 0, 4) < 4)
+                    throw new FormatException();
+                return BigEndian.ToInt32 (m_buffer, 0);
+
+            case 0xDA: // Raw16
+                if (input.Read (m_buffer, 0, 2) < 2)
+                    throw new FormatException();
+                int length = BigEndian.ToUInt16 (m_buffer, 0);
+                return ReadString (input, length);
+
+            default:
+                throw new FormatException();
+            }
+        }
+
+        string ReadString (Stream input, int length)
+        {
+            if (length > m_buffer.Length)
+                m_buffer = new byte[(length + 0xF) & ~0xF];
+            input.Read (m_buffer, 0, length);
+            return Encoding.UTF8.GetString (m_buffer, 0, length);
+        }
+    }
+}