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Fix line breaks.
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Crsky
parent
4a16bb3e9e
commit
e642644845
@ -1,53 +1,53 @@
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//! \file ArcGXP.cs
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//! \date Thu Jun 30 08:17:12 2016
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//! \brief Astronauts 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 System.IO;
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using System.Text;
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using GameRes.Utility;
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namespace GameRes.Formats.Astronauts
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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 "GXP"; } }
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public override string Description { get { return "Astronauts resource archive"; } }
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public override uint Signature { get { return 0x505847; } } // 'GXP'
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public override bool IsHierarchic { get { return true; } }
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public override bool CanWrite { get { return false; } }
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private bool UseNameAsKey = false;
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static readonly byte[] KnownKey = {
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0x40, 0x21, 0x28, 0x38, 0xA6, 0x6E, 0x43, 0xA5, 0x40, 0x21, 0x28, 0x38, 0xA6, 0x43, 0xA5, 0x64,
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0x3E, 0x65, 0x24, 0x20, 0x46, 0x6E, 0x74,
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};
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//! \file ArcGXP.cs
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//! \date Thu Jun 30 08:17:12 2016
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//! \brief Astronauts 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 System.IO;
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using System.Text;
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using GameRes.Utility;
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namespace GameRes.Formats.Astronauts
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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 "GXP"; } }
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public override string Description { get { return "Astronauts resource archive"; } }
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public override uint Signature { get { return 0x505847; } } // 'GXP'
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public override bool IsHierarchic { get { return true; } }
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public override bool CanWrite { get { return false; } }
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private bool UseNameAsKey = false;
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static readonly byte[] KnownKey = {
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0x40, 0x21, 0x28, 0x38, 0xA6, 0x6E, 0x43, 0xA5, 0x40, 0x21, 0x28, 0x38, 0xA6, 0x43, 0xA5, 0x64,
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0x3E, 0x65, 0x24, 0x20, 0x46, 0x6E, 0x74,
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};
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public override ArcFile TryOpen(ArcView file)
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{
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UseNameAsKey = false;
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@ -58,76 +58,76 @@ namespace GameRes.Formats.Astronauts
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arc = TryOpenGxpFile(file);
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}
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return arc;
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}
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private ArcFile TryOpenGxpFile (ArcView file)
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{
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int count = file.View.ReadInt32 (0x18);
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if (!IsSaneCount (count))
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}
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private ArcFile TryOpenGxpFile (ArcView file)
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{
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int count = file.View.ReadInt32 (0x18);
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if (!IsSaneCount (count))
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return null;
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string arcname = Path.GetFileName(file.Name);
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byte[] arcname_bytes = Encoding.ASCII.GetBytes(arcname);
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long base_offset = file.View.ReadInt64 (0x28);
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uint entry_key = KnownKey[0] | (1u ^ KnownKey[1]) << 8 | (2u ^ KnownKey[2]) << 16 | (3u ^ KnownKey[3]) << 24;
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string arcname = Path.GetFileName(file.Name);
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byte[] arcname_bytes = Encoding.ASCII.GetBytes(arcname);
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long base_offset = file.View.ReadInt64 (0x28);
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uint entry_key = KnownKey[0] | (1u ^ KnownKey[1]) << 8 | (2u ^ KnownKey[2]) << 16 | (3u ^ KnownKey[3]) << 24;
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if (UseNameAsKey)
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{
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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);
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entry_key ^= arcname_key;
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}
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uint index_offset = 0x30;
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var entry_buffer = new byte[0x100];
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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var entry_length = file.View.ReadUInt32 (index_offset) ^ entry_key;
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if (entry_length < 0x20 || entry_length > 0x1000)
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return null;
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if (entry_length > entry_buffer.Length)
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entry_buffer = new byte[entry_length];
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if (entry_length != file.View.Read (index_offset, entry_buffer, 0, entry_length))
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return null;
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}
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uint index_offset = 0x30;
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var entry_buffer = new byte[0x100];
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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var entry_length = file.View.ReadUInt32 (index_offset) ^ entry_key;
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if (entry_length < 0x20 || entry_length > 0x1000)
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return null;
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if (entry_length > entry_buffer.Length)
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entry_buffer = new byte[entry_length];
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if (entry_length != file.View.Read (index_offset, entry_buffer, 0, entry_length))
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return null;
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if (UseNameAsKey)
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Decrypt(entry_buffer, entry_length, arcname_bytes);
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else
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Decrypt(entry_buffer, entry_length);
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int name_length = LittleEndian.ToInt32 (entry_buffer, 0xC) * 2; // length in characters
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if (name_length >= entry_length)
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return null;
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var name = Encoding.Unicode.GetString (entry_buffer, 0x20, name_length);
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = base_offset + LittleEndian.ToInt64 (entry_buffer, 0x18);
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entry.Size = LittleEndian.ToUInt32 (entry_buffer, 4); // length is 64-bit actually
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += entry_length;
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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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var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
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Decrypt(entry_buffer, entry_length);
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int name_length = LittleEndian.ToInt32 (entry_buffer, 0xC) * 2; // length in characters
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if (name_length >= entry_length)
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return null;
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var name = Encoding.Unicode.GetString (entry_buffer, 0x20, name_length);
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = base_offset + LittleEndian.ToInt64 (entry_buffer, 0x18);
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entry.Size = LittleEndian.ToUInt32 (entry_buffer, 4); // length is 64-bit actually
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += entry_length;
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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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var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
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if (UseNameAsKey)
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{
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string arcname = Path.GetFileName(arc.File.Name);
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byte[] arcname_bytes = Encoding.ASCII.GetBytes(arcname);
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Decrypt(data, entry.Size, arcname_bytes);
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}
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}
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else
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Decrypt(data, entry.Size);
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return new BinMemoryStream (data, entry.Name);
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}
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static void Decrypt (byte[] data, uint length, byte[] key=null)
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{
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for (uint i = 0; i < length; ++i)
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{
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byte xorkey = (byte)(i ^ KnownKey[i % KnownKey.Length]);
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Decrypt(data, entry.Size);
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return new BinMemoryStream (data, entry.Name);
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}
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static void Decrypt (byte[] data, uint length, byte[] key=null)
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{
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for (uint i = 0; i < length; ++i)
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{
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byte xorkey = (byte)(i ^ KnownKey[i % KnownKey.Length]);
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if(null != key)
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xorkey ^= key[i % key.Length];
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data[i] ^= xorkey;
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}
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}
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}
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}
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xorkey ^= key[i % key.Length];
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data[i] ^= xorkey;
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}
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}
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}
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}
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