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87 lines
3.7 KiB
C#
87 lines
3.7 KiB
C#
//! \file ArcIKS.cs
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//! \date Wed Jul 08 07:07:09 2015
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//! \brief [IKS] archives implementation.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Linq;
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using System.Security.Cryptography;
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using GameRes.Utility;
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namespace GameRes.Formats.X
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{
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[Export(typeof(ArchiveFormat))]
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public class IksOpener : ArchiveFormat
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{
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public override string Tag { get { return "IKS"; } }
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public override string Description { get { return "X[iks] resource archive"; } }
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public override uint Signature { get { return 0x5253504E; } } // 'NPSR'
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public override bool IsHierarchic { get { return false; } }
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public override bool CanWrite { get { return false; } }
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public static Dictionary<string, byte> KnownKeys = new Dictionary<string, byte>() {
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{ "Shikkan ~Hazukashimerareta Karada, Oreta Kokoro~", 0x66 },
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};
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public override ArcFile TryOpen (ArcView file)
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{
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int count = file.View.ReadInt32 (4);
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if (count <= 0 || count > 0xfffff)
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return null;
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uint index_offset = 0x10;
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uint index_size = (uint)(0x28 * count);
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if (index_size > file.View.Reserve (index_offset, index_size))
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return null;
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long data_offset = index_offset + index_size;
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var dir = new List<Entry> (count);
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var name_buffer = new byte[0x18];
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for (int i = 0; i < count; ++i)
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{
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byte name_length = Math.Min ((byte)0x17, file.View.ReadByte (index_offset));
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if (name_length > name_buffer.Length)
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return null;
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file.View.Read (index_offset+1, name_buffer, 0, name_length);
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string name = Encodings.cp932.GetString (name_buffer, 0, name_length);
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = file.View.ReadUInt32 (index_offset+0x20);
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entry.Size = file.View.ReadUInt32 (index_offset+0x1C);
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if (entry.Offset < data_offset || !entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += 0x28;
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}
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return new ArcFile (file, this, dir);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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byte key = KnownKeys.First().Value;
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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return new XoredStream (input, key);
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}
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}
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}
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