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(QLIE): try different decryptors for version 1 archives.
This commit is contained in:
morkt
parent
2f314aa687
commit
b6d29c4075
@ -110,68 +110,38 @@ namespace GameRes.Formats.Qlie
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if (!file.View.AsciiEqual (index_offset, "FilePackVer")
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|| '.' != file.View.ReadByte (index_offset+0xC))
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return null;
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var pack_version = new Version (file.View.ReadByte (index_offset+0xB) - '0',
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file.View.ReadByte (index_offset+0xD) - '0');
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int count = file.View.ReadInt32 (index_offset+0x10);
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if (!IsSaneCount (count))
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return null;
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index_offset = file.View.ReadInt64 (index_offset+0x14);
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if (index_offset < 0 || index_offset >= file.MaxOffset)
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return null;
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byte[] arc_key = null;
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byte[] key_file = null;
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bool use_pack_keyfile = false;
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if (pack_version.Major >= 3)
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using (var index = new PackIndexReader (this, file, index_offset))
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{
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key_file = FindKeyFile (file);
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use_pack_keyfile = key_file != null;
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// currently, user is prompted to choose encryption scheme only if there's 'key.fkey' file found.
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if (use_pack_keyfile && pack_version.Minor == 0)
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arc_key = QueryEncryption (file);
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// use_pack_keyfile = null != arc_key;
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}
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var enc = QlieEncryption.Create (file, pack_version, arc_key);
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bool read_pack_keyfile = 3 == pack_version.Major && use_pack_keyfile;
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var name_buffer = new byte[0x100];
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var dir = new List<Entry> (count);
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using (var index = file.CreateStream (index_offset))
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{
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for (int i = 0; i < count; ++i)
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byte[] arc_key = null;
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byte[] key_file = null;
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bool use_pack_keyfile = false;
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if (index.PackVersion.Major >= 3)
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{
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int name_length = index.ReadUInt16();
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if (enc.IsUnicode)
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name_length *= 2;
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if (name_length > name_buffer.Length)
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name_buffer = new byte[name_length];
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if (name_length != index.Read (name_buffer, 0, name_length))
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return null;
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var name = enc.DecryptName (name_buffer, name_length);
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var entry = Create<QlieEntry> (name);
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if (use_pack_keyfile)
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entry.RawName = name_buffer.Take (name_length).ToArray();
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entry.Offset = index.ReadInt64(); // [+00]
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entry.Size = index.ReadUInt32(); // [+08]
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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entry.UnpackedSize = index.ReadUInt32(); // [+0C]
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entry.IsPacked = 0 != index.ReadInt32(); // [+10]
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entry.EncryptionMethod = index.ReadInt32(); // [+14]
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if (pack_version.Major > 1)
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entry.Hash = index.ReadUInt32(); // [+18]
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entry.KeyFile = key_file;
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if (read_pack_keyfile && entry.Name.Contains ("pack_keyfile"))
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{
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// note that 'pack_keyfile' itself is encrypted using 'key.fkey' file contents.
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key_file = ReadEntryBytes (file, entry, enc);
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read_pack_keyfile = false;
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}
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dir.Add (entry);
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key_file = FindKeyFile (file);
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use_pack_keyfile = key_file != null;
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// currently, user is prompted to choose encryption scheme only if there's 'key.fkey' file found.
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if (use_pack_keyfile && index.PackVersion.Minor == 0)
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arc_key = QueryEncryption (file);
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// use_pack_keyfile = null != arc_key;
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}
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var enc = QlieEncryption.Create (file, index.PackVersion, arc_key);
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List<Entry> dir = null;
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try
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{
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dir = index.Read (enc, key_file, use_pack_keyfile);
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}
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catch
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{
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if (index.PackVersion.Major == 1)
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{
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enc = new EncryptionV2();
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dir = index.Read (enc, key_file, use_pack_keyfile);
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}
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}
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if (null == dir)
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return null;
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return new QlieArchive (file, this, dir, enc);
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}
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return new QlieArchive (file, this, dir, enc);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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@ -184,7 +154,7 @@ namespace GameRes.Formats.Qlie
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return new BinMemoryStream (data, entry.Name);
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}
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private byte[] ReadEntryBytes (ArcView file, QlieEntry entry, IEncryption enc)
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internal byte[] ReadEntryBytes (ArcView file, QlieEntry entry, IEncryption enc)
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{
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var data = file.View.ReadBytes (entry.Offset, entry.Size);
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if (entry.IsEncrypted)
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@ -391,4 +361,85 @@ namespace GameRes.Formats.Qlie
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}
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}
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}
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internal sealed class PackIndexReader : IDisposable
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{
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PackOpener m_fmt;
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ArcView m_file;
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Version m_pack_version;
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int m_count;
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long m_index_offset;
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IBinaryStream m_index;
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List<Entry> m_dir;
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public Version PackVersion { get { return m_pack_version; } }
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public PackIndexReader (PackOpener fmt, ArcView file, long index_offset)
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{
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m_fmt = fmt;
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m_file = file;
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m_pack_version = new Version (m_file.View.ReadByte (index_offset+0xB) - '0',
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m_file.View.ReadByte (index_offset+0xD) - '0');
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m_count = m_file.View.ReadInt32 (index_offset+0x10);
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if (!ArchiveFormat.IsSaneCount (m_count))
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throw new InvalidFormatException();
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m_index_offset = m_file.View.ReadInt64 (index_offset+0x14);
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if (index_offset < 0 || index_offset >= m_file.MaxOffset)
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throw new InvalidFormatException();
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m_index = m_file.CreateStream (m_index_offset);
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m_dir = new List<Entry> (m_count);
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}
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byte[] m_name_buffer = new byte[0x100];
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public List<Entry> Read (IEncryption enc, byte[] key_file, bool use_pack_keyfile)
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{
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m_dir.Clear();
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m_index.Position = 0;
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bool read_pack_keyfile = 3 == m_pack_version.Major && use_pack_keyfile;
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for (int i = 0; i < m_count; ++i)
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{
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int name_length = m_index.ReadUInt16();
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if (enc.IsUnicode)
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name_length *= 2;
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if (name_length > m_name_buffer.Length)
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m_name_buffer = new byte[name_length];
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if (name_length != m_index.Read (m_name_buffer, 0, name_length))
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return null;
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var name = enc.DecryptName (m_name_buffer, name_length);
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var entry = m_fmt.Create<QlieEntry> (name);
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if (use_pack_keyfile)
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entry.RawName = m_name_buffer.Take (name_length).ToArray();
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entry.Offset = m_index.ReadInt64(); // [+00]
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entry.Size = m_index.ReadUInt32(); // [+08]
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if (!entry.CheckPlacement (m_file.MaxOffset))
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return null;
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entry.UnpackedSize = m_index.ReadUInt32(); // [+0C]
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entry.IsPacked = 0 != m_index.ReadInt32(); // [+10]
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entry.EncryptionMethod = m_index.ReadInt32(); // [+14]
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if (m_pack_version.Major > 1)
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entry.Hash = m_index.ReadUInt32(); // [+18]
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entry.KeyFile = key_file;
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if (read_pack_keyfile && entry.Name.Contains ("pack_keyfile"))
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{
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// note that 'pack_keyfile' itself is encrypted using 'key.fkey' file contents.
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key_file = m_fmt.ReadEntryBytes (m_file, entry, enc);
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read_pack_keyfile = false;
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}
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m_dir.Add (entry);
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}
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return m_dir;
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}
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bool m_disposed = false;
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public void Dispose ()
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{
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if (!m_disposed)
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{
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m_index.Dispose();
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m_disposed = true;
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}
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}
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}
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}
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