diff --git a/ArcFormats/Astronauts/ArcGXP.cs b/ArcFormats/Astronauts/ArcGXP.cs index 2464d4d5..10848684 100644 --- a/ArcFormats/Astronauts/ArcGXP.cs +++ b/ArcFormats/Astronauts/ArcGXP.cs @@ -1,53 +1,53 @@ -//! \file ArcGXP.cs -//! \date Thu Jun 30 08:17:12 2016 -//! \brief Astronauts resource archive. -// -// Copyright (C) 2016 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.Text; -using GameRes.Utility; - -namespace GameRes.Formats.Astronauts -{ - [Export(typeof(ArchiveFormat))] - public class PakOpener : ArchiveFormat - { - public override string Tag { get { return "GXP"; } } - public override string Description { get { return "Astronauts resource archive"; } } - public override uint Signature { get { return 0x505847; } } // 'GXP' - public override bool IsHierarchic { get { return true; } } - public override bool CanWrite { get { return false; } } - - private bool UseNameAsKey = false; - - static readonly byte[] KnownKey = { - 0x40, 0x21, 0x28, 0x38, 0xA6, 0x6E, 0x43, 0xA5, 0x40, 0x21, 0x28, 0x38, 0xA6, 0x43, 0xA5, 0x64, - 0x3E, 0x65, 0x24, 0x20, 0x46, 0x6E, 0x74, - }; - +//! \file ArcGXP.cs +//! \date Thu Jun 30 08:17:12 2016 +//! \brief Astronauts resource archive. +// +// Copyright (C) 2016 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.Text; +using GameRes.Utility; + +namespace GameRes.Formats.Astronauts +{ + [Export(typeof(ArchiveFormat))] + public class PakOpener : ArchiveFormat + { + public override string Tag { get { return "GXP"; } } + public override string Description { get { return "Astronauts resource archive"; } } + public override uint Signature { get { return 0x505847; } } // 'GXP' + public override bool IsHierarchic { get { return true; } } + public override bool CanWrite { get { return false; } } + + private bool UseNameAsKey = false; + + static readonly byte[] KnownKey = { + 0x40, 0x21, 0x28, 0x38, 0xA6, 0x6E, 0x43, 0xA5, 0x40, 0x21, 0x28, 0x38, 0xA6, 0x43, 0xA5, 0x64, + 0x3E, 0x65, 0x24, 0x20, 0x46, 0x6E, 0x74, + }; + public override ArcFile TryOpen(ArcView file) { UseNameAsKey = false; @@ -58,76 +58,76 @@ namespace GameRes.Formats.Astronauts arc = TryOpenGxpFile(file); } return arc; - } - - private ArcFile TryOpenGxpFile (ArcView file) - { - int count = file.View.ReadInt32 (0x18); - if (!IsSaneCount (count)) + } + + private ArcFile TryOpenGxpFile (ArcView file) + { + int count = file.View.ReadInt32 (0x18); + if (!IsSaneCount (count)) return null; - string arcname = Path.GetFileName(file.Name); - byte[] arcname_bytes = Encoding.ASCII.GetBytes(arcname); - long base_offset = file.View.ReadInt64 (0x28); - uint entry_key = KnownKey[0] | (1u ^ KnownKey[1]) << 8 | (2u ^ KnownKey[2]) << 16 | (3u ^ KnownKey[3]) << 24; + string arcname = Path.GetFileName(file.Name); + byte[] arcname_bytes = Encoding.ASCII.GetBytes(arcname); + long base_offset = file.View.ReadInt64 (0x28); + uint entry_key = KnownKey[0] | (1u ^ KnownKey[1]) << 8 | (2u ^ KnownKey[2]) << 16 | (3u ^ KnownKey[3]) << 24; if (UseNameAsKey) { uint arcname_key = (uint)(arcname_bytes[0] | (arcname_bytes[1 % arcname_bytes.Length]) << 8 | (arcname_bytes[2 % arcname_bytes.Length]) << 16 | (arcname_bytes[3 % arcname_bytes.Length]) << 24); entry_key ^= arcname_key; - } - uint index_offset = 0x30; - var entry_buffer = new byte[0x100]; - var dir = new List (count); - for (int i = 0; i < count; ++i) - { - var entry_length = file.View.ReadUInt32 (index_offset) ^ entry_key; - if (entry_length < 0x20 || entry_length > 0x1000) - return null; - if (entry_length > entry_buffer.Length) - entry_buffer = new byte[entry_length]; - if (entry_length != file.View.Read (index_offset, entry_buffer, 0, entry_length)) - return null; + } + uint index_offset = 0x30; + var entry_buffer = new byte[0x100]; + var dir = new List (count); + for (int i = 0; i < count; ++i) + { + var entry_length = file.View.ReadUInt32 (index_offset) ^ entry_key; + if (entry_length < 0x20 || entry_length > 0x1000) + return null; + if (entry_length > entry_buffer.Length) + entry_buffer = new byte[entry_length]; + if (entry_length != file.View.Read (index_offset, entry_buffer, 0, entry_length)) + return null; if (UseNameAsKey) Decrypt(entry_buffer, entry_length, arcname_bytes); else - Decrypt(entry_buffer, entry_length); - int name_length = LittleEndian.ToInt32 (entry_buffer, 0xC) * 2; // length in characters - if (name_length >= entry_length) - return null; - var name = Encoding.Unicode.GetString (entry_buffer, 0x20, name_length); - var entry = FormatCatalog.Instance.Create (name); - entry.Offset = base_offset + LittleEndian.ToInt64 (entry_buffer, 0x18); - entry.Size = LittleEndian.ToUInt32 (entry_buffer, 4); // length is 64-bit actually - if (!entry.CheckPlacement (file.MaxOffset)) - return null; - dir.Add (entry); - index_offset += entry_length; - } - return new ArcFile (file, this, dir); - } - - public override Stream OpenEntry (ArcFile arc, Entry entry) - { - var data = arc.File.View.ReadBytes (entry.Offset, entry.Size); + Decrypt(entry_buffer, entry_length); + int name_length = LittleEndian.ToInt32 (entry_buffer, 0xC) * 2; // length in characters + if (name_length >= entry_length) + return null; + var name = Encoding.Unicode.GetString (entry_buffer, 0x20, name_length); + var entry = FormatCatalog.Instance.Create (name); + entry.Offset = base_offset + LittleEndian.ToInt64 (entry_buffer, 0x18); + entry.Size = LittleEndian.ToUInt32 (entry_buffer, 4); // length is 64-bit actually + if (!entry.CheckPlacement (file.MaxOffset)) + return null; + dir.Add (entry); + index_offset += entry_length; + } + return new ArcFile (file, this, dir); + } + + public override Stream OpenEntry (ArcFile arc, Entry entry) + { + var data = arc.File.View.ReadBytes (entry.Offset, entry.Size); if (UseNameAsKey) { string arcname = Path.GetFileName(arc.File.Name); byte[] arcname_bytes = Encoding.ASCII.GetBytes(arcname); Decrypt(data, entry.Size, arcname_bytes); - } + } else - Decrypt(data, entry.Size); - return new BinMemoryStream (data, entry.Name); - } - - static void Decrypt (byte[] data, uint length, byte[] key=null) - { - for (uint i = 0; i < length; ++i) - { - byte xorkey = (byte)(i ^ KnownKey[i % KnownKey.Length]); + Decrypt(data, entry.Size); + return new BinMemoryStream (data, entry.Name); + } + + static void Decrypt (byte[] data, uint length, byte[] key=null) + { + for (uint i = 0; i < length; ++i) + { + byte xorkey = (byte)(i ^ KnownKey[i % KnownKey.Length]); if(null != key) - xorkey ^= key[i % key.Length]; - data[i] ^= xorkey; - } - } - } -} + xorkey ^= key[i % key.Length]; + data[i] ^= xorkey; + } + } + } +}