mirror of
https://github.com/crskycode/GARbro.git
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556 lines
19 KiB
C#
556 lines
19 KiB
C#
//! \file ArcNOA.cs
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//! \date Thu Apr 23 15:57:17 2015
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//! \brief Entis GLS engine 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.Diagnostics;
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using System.IO;
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using System.Text;
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using GameRes.Formats.Properties;
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using GameRes.Formats.Strings;
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using GameRes.Utility;
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namespace GameRes.Formats.Entis
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{
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internal class NoaOptions : ResourceOptions
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{
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public string Scheme { get; set; }
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public string PassPhrase { get; set; }
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}
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internal class NoaEntry : Entry
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{
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public byte[] Extra;
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public uint Encryption;
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public uint Attr;
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}
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internal class NoaArchive : ArcFile
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{
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public string Password;
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public NoaArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, string password = null)
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: base (arc, impl, dir)
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{
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Password = password;
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}
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}
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[Serializable]
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public class NoaScheme : ResourceScheme
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{
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public Dictionary<string, Dictionary<string, string>> KnownKeys;
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}
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[Export(typeof(ArchiveFormat))]
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public class NoaOpener : ArchiveFormat
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{
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public override string Tag { get { return "NOA"; } }
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public override string Description { get { return "Entis GLS engine resource archive"; } }
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public override uint Signature { get { return 0x69746e45; } } // 'Enti'
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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 NoaOpener ()
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{
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Extensions = new string[] { "noa", "dat", "rsa" };
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}
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public static Dictionary<string, Dictionary<string, string>> KnownKeys =
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new Dictionary<string, Dictionary<string, string>>();
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (0, "Entis\x1a"))
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return null;
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uint id = file.View.ReadUInt32 (8);
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if (0x02000400 != id)
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return null;
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var reader = new IndexReader (file);
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if (!reader.ParseRoot() || 0 == reader.Dir.Count)
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return null;
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if (!reader.HasEncrypted)
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return new ArcFile (file, this, reader.Dir);
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var options = Query<NoaOptions> (arcStrings.ArcEncryptedNotice);
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string password = null;
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if (!string.IsNullOrEmpty (options.PassPhrase))
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{
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password = options.PassPhrase;
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}
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else if (!string.IsNullOrEmpty (options.Scheme))
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{
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Dictionary<string, string> filemap;
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if (KnownKeys.TryGetValue (options.Scheme, out filemap))
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{
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var filename = Path.GetFileName (file.Name).ToLowerInvariant();
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filemap.TryGetValue (filename, out password);
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}
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}
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if (string.IsNullOrEmpty (password))
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return new ArcFile (file, this, reader.Dir);
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return new NoaArchive (file, this, reader.Dir, password);
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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 nent = entry as NoaEntry;
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if (null == nent)
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return arc.File.CreateStream (entry.Offset, entry.Size);
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ulong size = arc.File.View.ReadUInt64 (entry.Offset+8);
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if (size > int.MaxValue)
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throw new FileSizeException();
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if (size <= 4)
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return Stream.Null;
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if (EncType.ERISACode == nent.Encryption)
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{
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using (var enc = arc.File.CreateStream (entry.Offset+0x10, (uint)size-4))
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return DecodeNemesis (enc);
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}
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var narc = arc as NoaArchive;
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var input = arc.File.CreateStream (entry.Offset+0x10, (uint)size);
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if (EncType.Raw == nent.Encryption || null == narc || null == narc.Password)
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return input;
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if (EncType.BSHFCrypt == nent.Encryption)
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{
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using (input)
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return DecodeBSHF (input, narc.Password);
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}
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Trace.WriteLine (string.Format ("{0}: encryption scheme 0x{1:x8} not implemented",
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nent.Name, nent.Encryption));
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return input;
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}
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Stream DecodeNemesis (Stream input)
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{
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var decoder = new NemesisDecodeContext();
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decoder.AttachInputFile (input);
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decoder.PrepareToDecodeERISANCode();
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var file = new MemoryStream ((int)input.Length);
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var buffer = new byte[0x10000];
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for (;;)
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{
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int read = (int)decoder.DecodeNemesisCodeBytes (buffer, 0x10000);
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if (0 == read)
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break;
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file.Write (buffer, 0, read);
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}
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file.Position = 0;
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return file;
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}
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Stream DecodeBSHF (Stream input, string password)
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{
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uint nTotalBytes = (uint)input.Length - 4;
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var pBSHF = new BSHFDecodeContext (0x10000);
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pBSHF.AttachInputFile (input);
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pBSHF.PrepareToDecodeBSHFCode (password);
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byte[] buf = new byte[nTotalBytes];
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uint decoded = pBSHF.DecodeBSHFCodeBytes (buf, nTotalBytes);
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if (decoded < nTotalBytes)
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throw new EndOfStreamException ("Unexpected end of encrypted stream");
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return new MemoryStream (buf);
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}
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public override ResourceOptions GetDefaultOptions ()
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{
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return new NoaOptions {
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Scheme = Settings.Default.NOAScheme,
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PassPhrase = Settings.Default.NOAPassPhrase,
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};
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}
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public override object GetAccessWidget ()
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{
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return new GUI.WidgetNOA();
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}
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internal static class EncType
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{
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public const uint Raw = 0x00000000;
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public const uint ERISACode = 0x80000010;
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public const uint BSHFCrypt = 0x40000000;
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public const uint SimpleCrypt32 = 0x20000000;
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public const uint ERISACrypt = 0xC0000010;
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public const uint ERISACrypt32 = 0xA0000010;
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}
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internal class IndexReader
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{
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ArcView m_file;
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List<Entry> m_dir = new List<Entry>();
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bool m_found_encrypted = false;
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const char PathSeparatorChar = '/';
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public List<Entry> Dir { get { return m_dir; } }
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public bool HasEncrypted { get { return m_found_encrypted; } }
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public IndexReader (ArcView file)
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{
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m_file = file;
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}
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public bool ParseRoot ()
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{
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return ParseDirEntry (0x40, "");
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}
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private bool ParseDirEntry (long dir_offset, string cur_dir)
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{
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if (!m_file.View.AsciiEqual (dir_offset, "DirEntry"))
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return false;
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long size = m_file.View.ReadInt64 (dir_offset+8);
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if (size <= 0 || size > int.MaxValue)
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return false;
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if ((uint)size > m_file.View.Reserve (dir_offset+8, (uint)size))
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return false;
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long base_offset = dir_offset;
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dir_offset += 0x10;
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int count = m_file.View.ReadInt32 (dir_offset);
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dir_offset += 4;
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if (m_dir.Capacity < m_dir.Count+count)
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m_dir.Capacity = m_dir.Count+count;
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for (int i = 0; i < count; ++i)
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{
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var entry = new NoaEntry();
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entry.Size = m_file.View.ReadUInt32 (dir_offset);
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dir_offset += 8;
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entry.Attr = m_file.View.ReadUInt32 (dir_offset);
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dir_offset += 4;
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entry.Encryption = m_file.View.ReadUInt32 (dir_offset);
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m_found_encrypted = m_found_encrypted || (EncType.Raw != entry.Encryption && EncType.ERISACode != entry.Encryption);
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dir_offset += 4;
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entry.Offset = base_offset + m_file.View.ReadInt64 (dir_offset);
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if (!entry.CheckPlacement (m_file.MaxOffset))
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{
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entry.Size = (uint)(m_file.MaxOffset - entry.Offset);
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}
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dir_offset += 0x10;
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uint extra_length = m_file.View.ReadUInt32 (dir_offset);
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dir_offset += 4;
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if (extra_length > 0 && 0 == (entry.Attr & 0x70))
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{
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entry.Extra = m_file.View.ReadBytes (dir_offset, extra_length);
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if (entry.Extra.Length != extra_length)
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return false;
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}
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dir_offset += extra_length;
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uint name_length = m_file.View.ReadUInt32 (dir_offset);
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dir_offset += 4;
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string name = m_file.View.ReadString (dir_offset, name_length);
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dir_offset += name_length;
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if (string.IsNullOrEmpty (cur_dir))
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entry.Name = name;
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else
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entry.Name = cur_dir + PathSeparatorChar + name;
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entry.Type = FormatCatalog.Instance.GetTypeFromName (name);
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if (0x10 == entry.Attr)
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{
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if (!ParseDirEntry (entry.Offset+0x10, entry.Name))
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return false;
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}
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else if (0x20 == entry.Attr || 0x40 == entry.Attr)
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{
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break;
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}
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else
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{
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m_dir.Add (entry);
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}
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}
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return true;
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}
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}
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public override ResourceScheme Scheme
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{
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get { return new NoaScheme { KnownKeys = KnownKeys }; }
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set { KnownKeys = ((NoaScheme)value).KnownKeys; }
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}
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}
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internal abstract class ERISADecodeContext
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{
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protected int m_nIntBufCount;
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protected uint m_dwIntBuffer;
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protected uint m_nBufferingSize;
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protected uint m_nBufCount;
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protected byte[] m_ptrBuffer;
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protected int m_ptrNextBuf;
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protected Stream m_pFile;
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protected ERISADecodeContext m_pContext;
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public ERISADecodeContext (uint nBufferingSize)
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{
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m_nIntBufCount = 0;
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m_nBufferingSize = (nBufferingSize + 0x03) & ~0x03u;
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m_nBufCount = 0;
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m_ptrBuffer = new byte[nBufferingSize];
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m_pFile = null;
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m_pContext = null;
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}
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public void AttachInputFile (Stream file)
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{
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m_pFile = file;
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m_pContext = null;
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}
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public void AttachInputContext (ERISADecodeContext context)
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{
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m_pFile = null;
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m_pContext = context;
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}
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public uint ReadNextData (byte[] ptrBuffer, uint nBytes)
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{
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if (m_pFile != null)
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{
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return (uint)m_pFile.Read (ptrBuffer, 0, (int)nBytes);
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}
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else if (m_pContext != null)
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{
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return m_pContext.DecodeBytes (ptrBuffer, nBytes);
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}
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else
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{
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throw new ApplicationException ("Uninitialized ERISA encryption context");
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}
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}
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public abstract uint DecodeBytes (Array ptrDst, uint nCount);
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protected bool PrefetchBuffer()
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{
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if (0 == m_nIntBufCount)
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{
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if (0 == m_nBufCount)
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{
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m_ptrNextBuf = 0; // m_ptrBuffer;
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m_nBufCount = ReadNextData (m_ptrBuffer, m_nBufferingSize);
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if (0 == m_nBufCount)
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{
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return false;
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}
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if (0 != (m_nBufCount & 0x03))
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{
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uint i = m_nBufCount;
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m_nBufCount += 4 - (m_nBufCount & 0x03);
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while (i < m_nBufCount)
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m_ptrBuffer[i ++] = 0;
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}
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}
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m_nIntBufCount = 32;
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m_dwIntBuffer =
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((uint)m_ptrBuffer[m_ptrNextBuf] << 24) | ((uint)m_ptrBuffer[m_ptrNextBuf+1] << 16)
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| ((uint)m_ptrBuffer[m_ptrNextBuf+2] << 8) | (uint)m_ptrBuffer[m_ptrNextBuf+3];
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m_ptrNextBuf += 4;
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m_nBufCount -= 4;
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}
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return true;
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}
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public void FlushBuffer ()
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{
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m_nIntBufCount = 0;
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m_nBufCount = 0;
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}
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public int GetABit ()
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{
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if (!PrefetchBuffer())
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{
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return 1;
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}
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int nValue = ((int)m_dwIntBuffer) >> 31;
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--m_nIntBufCount;
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m_dwIntBuffer <<= 1;
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return nValue;
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}
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public uint GetNBits (int n)
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{
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uint nCode = 0;
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while (n != 0)
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{
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if (!PrefetchBuffer())
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break;
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int nCopyBits = Math.Min (n, m_nIntBufCount);
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nCode = (nCode << nCopyBits) | (m_dwIntBuffer >> (32 - nCopyBits));
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n -= nCopyBits;
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m_nIntBufCount -= nCopyBits;
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m_dwIntBuffer <<= nCopyBits;
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}
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return nCode;
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}
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}
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internal class BSHFDecodeContext : ERISADecodeContext
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{
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ERIBshfBuffer m_pBshfBuf;
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uint m_dwBufPos;
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public BSHFDecodeContext (uint nBufferingSize) : base (nBufferingSize)
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{
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m_pBshfBuf = null;
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}
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public void PrepareToDecodeBSHFCode (string pszPassword)
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{
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if (null == m_pBshfBuf)
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{
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m_pBshfBuf = new ERIBshfBuffer();
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}
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if (string.IsNullOrEmpty (pszPassword))
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{
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pszPassword = " ";
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}
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int char_count = Encoding.ASCII.GetByteCount (pszPassword);
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int length = Math.Max (char_count, 32);
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var pass_bytes = new byte[length];
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char_count = Encoding.ASCII.GetBytes (pszPassword, 0, pszPassword.Length, pass_bytes, 0);
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if (char_count < 32)
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{
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pass_bytes[char_count++] = 0x1b;
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for (int i = char_count; i < 32; ++i)
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{
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pass_bytes[i] = (byte)(pass_bytes[i % char_count] + pass_bytes[i - 1]);
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}
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}
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m_pBshfBuf.m_strPassword = pass_bytes;
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m_pBshfBuf.m_dwPassOffset = 0;
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m_dwBufPos = 32;
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}
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public override uint DecodeBytes (Array ptrDst, uint nCount)
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{
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return DecodeBSHFCodeBytes (ptrDst as byte[], nCount);
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}
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public uint DecodeBSHFCodeBytes (byte[] ptrDst, uint nCount)
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{
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uint nDecoded = 0;
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while (nDecoded < nCount)
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{
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if (m_dwBufPos >= 32)
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{
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for (int i = 0; i < 32; ++i)
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{
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if (0 == m_nBufCount)
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{
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m_ptrNextBuf = 0;
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m_nBufCount = ReadNextData (m_ptrBuffer, m_nBufferingSize);
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if (0 == m_nBufCount)
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{
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return nDecoded;
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}
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}
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m_pBshfBuf.m_srcBSHF[i] = m_ptrBuffer[m_ptrNextBuf++];
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m_nBufCount--;
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}
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m_pBshfBuf.DecodeBuffer();
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m_dwBufPos = 0;
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}
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ptrDst[nDecoded++] = m_pBshfBuf.m_bufBSHF[m_dwBufPos++];
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}
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return nDecoded;
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}
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}
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internal class ERIBshfBuffer
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{
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public byte[] m_strPassword;
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public uint m_dwPassOffset = 0;
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public byte[] m_bufBSHF = new byte[32];
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public byte[] m_srcBSHF = new byte[32];
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public byte[] m_maskBSHF = new byte[32];
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public void DecodeBuffer ()
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{
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int nPassLen = m_strPassword.Length;
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if ((int)m_dwPassOffset >= nPassLen)
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{
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m_dwPassOffset = 0;
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}
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for (int i = 0; i < 32; ++i)
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{
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m_bufBSHF[i] = 0;
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m_maskBSHF[i] = 0;
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}
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int iPos = (int) m_dwPassOffset++;
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int iBit = 0;
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for (int i = 0; i < 256; ++i)
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{
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iBit = (iBit + m_strPassword[iPos++]) & 0xFF;
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if (iPos >= nPassLen)
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{
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iPos = 0;
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}
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int iOffset = (iBit >> 3);
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int iMask = (0x80 >> (iBit & 0x07));
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while (0xFF == m_maskBSHF[iOffset])
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{
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iBit = (iBit + 8) & 0xFF;
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iOffset = (iBit >> 3);
|
|
}
|
|
while (0 != (m_maskBSHF[iOffset] & iMask))
|
|
{
|
|
iBit ++;
|
|
iMask >>= 1;
|
|
if (0 == iMask)
|
|
{
|
|
iBit = (iBit + 8) & 0xFF;
|
|
iOffset = (iBit >> 3);
|
|
iMask = 0x80;
|
|
}
|
|
}
|
|
Debug.Assert (iMask != 0);
|
|
m_maskBSHF[iOffset] |= (byte) iMask;
|
|
|
|
if (0 != (m_srcBSHF[(i >> 3)] & (0x80 >> (i & 0x07))))
|
|
{
|
|
m_bufBSHF[iOffset] |= (byte)iMask;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|