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implemented 'fPK' archives, 'fSG' images and 'fPX' audio.
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morkt
175
ArcFormats/Ivory/ArcPK.cs
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175
ArcFormats/Ivory/ArcPK.cs
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//! \file ArcPK.cs
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//! \date Mon Sep 12 01:39:49 2016
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//! \brief 'fPK' resource archive.
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//
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// Copyright (C) 2016 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 GameRes.Utility;
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namespace GameRes.Formats.Ivory
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{
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internal class PkEntry : Entry
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{
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public int NameOffset;
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}
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[Export(typeof(ArchiveFormat))]
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public class PakOpener : ArchiveFormat
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{
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public override string Tag { get { return "PK/IVORY"; } }
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public override string Description { get { return "Ivory resource archive"; } }
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public override uint Signature { get { return 0x204B5066; } } // 'fPK '
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public override bool IsHierarchic { get { return true; } }
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public override bool CanCreate { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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if (file.MaxOffset != file.View.ReadUInt32 (4))
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return null;
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long base_offset = 0;
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List<Entry> dir = null;
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bool got_names = false;
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long offset = 8;
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while (offset < file.MaxOffset)
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{
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var id = new AsciiString (file.View.ReadBytes (offset, 4));
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uint section_size = file.View.ReadUInt32 (offset+4);
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if (0 == section_size)
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return null;
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uint header_size = file.View.ReadUInt32 (offset+8);
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if ("cLST" == id)
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{
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int count = file.View.ReadInt32 (offset+0x10);
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if (!IsSaneCount (count))
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return null;
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uint key = file.View.ReadUInt32 (offset+0x14);
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var clst = file.View.ReadBytes (offset+header_size, section_size - header_size);
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Decrypt (clst, key);
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dir = new List<Entry> (count);
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int index_offset = 0;
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for (int i = 0; i < count; ++i)
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{
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var entry = new PkEntry {
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NameOffset = LittleEndian.ToInt32 (clst, index_offset),
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Offset = LittleEndian.ToUInt32 (clst, index_offset+4),
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Size = LittleEndian.ToUInt32 (clst, index_offset+8),
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};
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dir.Add (entry);
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index_offset += 12;
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}
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}
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else if ("cNAM" == id)
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{
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if (null == dir)
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return null;
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uint key = file.View.ReadUInt32 (offset+0x10);
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var cnam = file.View.ReadBytes (offset+header_size, section_size - header_size);
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Decrypt (cnam, key);
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foreach (PkEntry entry in dir)
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{
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var name = Binary.GetCString (cnam, entry.NameOffset);
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entry.Name = name;
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if (name.EndsWith (".px", StringComparison.InvariantCultureIgnoreCase))
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entry.Type = "audio";
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else
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entry.Type = FormatCatalog.Instance.GetTypeFromName (name);
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}
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got_names = true;
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}
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else if ("cDAT" == id)
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{
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base_offset = offset + header_size;
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}
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offset += section_size;
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}
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if (null == dir || !got_names || 0 == base_offset)
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return null;
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foreach (var entry in dir)
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{
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entry.Offset += base_offset;
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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}
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return new ArcFile (file, this, dir);
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}
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internal static void Decrypt (byte[] data, uint seed)
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{
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int length = data.Length / 4;
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if (0 == length)
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return;
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var ctl = new ushort[32];
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var key = new uint[32];
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for (int i = 0; i < 32; ++i)
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{
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uint code = 0;
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uint k = seed;
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for (int j = 0; j < 16; ++j)
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{
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code = (k ^ (k >> 1)) << 15 | (code & 0xFFFF) >> 1;
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k >>= 2;
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}
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key[i] = seed;
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ctl[i] = (ushort)code;
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seed = Binary.RotL (seed, 1);
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}
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unsafe
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{
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fixed (byte* data8 = data)
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{
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uint* data32 = (uint*)data8;
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for (int i = 0; i < length; ++i)
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{
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uint s = *data32;
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ushort code = ctl[i & 0x1F];
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uint d = 0;
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uint v3 = 3;
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uint v2 = 2;
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uint v1 = 1;
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for (int j = 0; j < 16; ++j)
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{
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if (0 != (code & 1))
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{
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d |= (s & v1) << 1 | (s >> 1) & (v2 >> 1);
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}
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else
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{
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d |= s & v3;
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}
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code >>= 1;
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v3 <<= 2;
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v2 <<= 2;
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v1 <<= 2;
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}
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*data32++ = d ^ key[i & 0x1F];
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}
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}
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}
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}
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}
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}
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