From 992661a65130188b09d253fa0667b4533d1bf12c Mon Sep 17 00:00:00 2001 From: morkt Date: Fri, 2 Feb 2018 03:45:40 +0400 Subject: [PATCH] implemented MD002 archives. --- ArcFormats/AdvScripter/ArcPAK.cs | 166 +++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 ArcFormats/AdvScripter/ArcPAK.cs diff --git a/ArcFormats/AdvScripter/ArcPAK.cs b/ArcFormats/AdvScripter/ArcPAK.cs new file mode 100644 index 00000000..1b64fed9 --- /dev/null +++ b/ArcFormats/AdvScripter/ArcPAK.cs @@ -0,0 +1,166 @@ +//! \file ArcPAK.cs +//! \date 2018 Jan 31 +//! \brief ADVScripter 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; +using GameRes.Compression; +using GameRes.Utility; + +namespace GameRes.Formats.AdvScripter +{ + internal class MdArchive : ArcFile + { + public readonly int Version; + + public MdArchive (ArcView arc, ArchiveFormat impl, ICollection dir, int version) + : base (arc, impl, dir) + { + Version = version; + } + } + + [Export(typeof(ArchiveFormat))] + public class PakOpener : ArchiveFormat + { + public override string Tag { get { return "PAK/MD002"; } } + public override string Description { get { return "ADVScripter engine resource archive"; } } + public override uint Signature { get { return 0x3030444D; } } // 'MD002' + public override bool IsHierarchic { get { return false; } } + public override bool CanWrite { get { return false; } } + + public override ArcFile TryOpen (ArcView file) + { + if (file.View.ReadByte (4) != '2' || !file.View.AsciiEqual (0x21, "00V")) + return null; + int count = file.View.ReadInt32 (0x24); + if (!IsSaneCount (count)) + return null; + int version = file.View.ReadByte (0x20) - '0'; + if (version < 1 || version > 9) + return null; + var index_entry = new IndexReader (file, version); + var buffer = new byte[0x30]; + uint index_offset = 0x28; + var dir = new List (count); + for (int i = 0; i < count; ++i) + { + file.View.Read (index_offset, buffer, 0, 0x30); + index_entry.Decrypt (buffer); + var name = Binary.GetCString (buffer, 0, 0x20); + var entry = FormatCatalog.Instance.Create (name); + entry.Offset = index_entry.Offset; + entry.UnpackedSize = index_entry.UnpackedSize; + entry.Size = index_entry.PackedSize; + entry.IsPacked = buffer.ToInt32 (0x20) != 0; + if (!entry.CheckPlacement (file.MaxOffset)) + return null; + dir.Add (entry); + index_offset += 0x30; + } + return new MdArchive (file, this, dir, version); + } + + public override Stream OpenEntry (ArcFile arc, Entry entry) + { + var mdarc = arc as MdArchive; + Stream input = arc.File.CreateStream (entry.Offset, entry.Size); + if (mdarc != null && (mdarc.Version >= 5 && mdarc.Version <= 8)) + input = new XoredStream (input, 0xFF); + var pent = entry as PackedEntry; + if (pent != null && pent.IsPacked) + input = new LzssStream (input); + return input; + } + + internal class IndexReader + { + public uint Offset; + public uint PackedSize; + public uint UnpackedSize; + + public readonly Action Decrypt; + + private uint m_key; + + public IndexReader (ArcView file, int version) + { + if (1 == version || 5 == version) + { + Decrypt = buffer => { + Offset = buffer.ToUInt32 (0x24); + UnpackedSize = buffer.ToUInt32 (0x28); + PackedSize = buffer.ToUInt32 (0x2C); + }; + return; + } + else if (2 == version || 6 == version) + m_key = uint.MaxValue; + else + m_key = file.View.ReadUInt32 (0x1C); + + Action read = buffer => { + Offset = buffer.ToUInt32 (0x24) ^ m_key; + UnpackedSize = buffer.ToUInt32 (0x28) ^ m_key; + PackedSize = buffer.ToUInt32 (0x2C) ^ m_key; + }; + Action transform; + if (9 == version) + { + transform = () => { + Offset = (Offset & 0xFFFF) << 15 | Offset >> 17; + UnpackedSize = (UnpackedSize & 0xFFFF) << 14 | UnpackedSize >> 18; + PackedSize = (PackedSize & 0xFFFF) << 13 | PackedSize >> 19; + }; + } + else + { + transform = () => { + Offset >>= 1; + UnpackedSize >>= 2; + PackedSize >>= 3; + }; + } + + Action decrypt_name = buffer => { }; + if (9 == version || 4 == version || 8 == version) + { + var key_bytes = new byte[4]; + LittleEndian.Pack (m_key, key_bytes, 0); + decrypt_name = buffer => { + for (int i = 0; i < 28; ++i) + buffer[i] ^= key_bytes[i & 3]; + }; + } + Decrypt = buffer => { + read (buffer); + transform (); + decrypt_name (buffer); + }; + } + } + } +}