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(QLIE): implemented FilePackVer3.1

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This commit is contained in:
morkt
2017-03-12 05:45:36 +04:00
parent 7ddc894742
commit 2d6dec4dfc
3 changed files with 383 additions and 179 deletions
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222
ArcFormats/Qlie/ArcQLIE.cs
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@@ -51,23 +51,12 @@ namespace GameRes.Formats.Qlie
internal class QlieArchive : ArcFile
{
/// <summary>
/// Hash generated from the key data contained within archive index.
/// </summary>
public uint Hash;
public readonly IEncryption Encryption;
/// <summary>
/// Internal game data used to decrypt encrypted entries.
/// null if not used.
/// </summary>
public byte[] GameKeyData;
public QlieArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir,
uint hash, byte[] key_data)
public QlieArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, IEncryption enc)
: base (arc, impl, dir)
{
Hash = hash;
GameKeyData = key_data;
Encryption = enc;
}
}
@@ -115,11 +104,10 @@ namespace GameRes.Formats.Qlie
return null;
long index_offset = file.MaxOffset - 0x1c;
if (!file.View.AsciiEqual (index_offset, "FilePackVer")
|| !file.View.AsciiEqual (index_offset+0xC, ".0"))
|| '.' != file.View.ReadByte (index_offset+0xC))
return null;
int pack_version = file.View.ReadByte (index_offset+0xB) - '0';
if (pack_version < 1 || pack_version > 3)
throw new NotSupportedException ("Not supported QLIE archive version");
var pack_version = new Version (file.View.ReadByte (index_offset+0xB) - '0',
file.View.ReadByte (index_offset+0xD) - '0');
int count = file.View.ReadInt32 (index_offset+0x10);
if (!IsSaneCount (count))
return null;
@@ -129,9 +117,8 @@ namespace GameRes.Formats.Qlie
byte[] arc_key = null;
byte[] key_file = null;
uint name_key = 0xC4; // default name encryption key for versions 1 and 2
bool use_pack_keyfile = false;
if (3 == pack_version)
if (pack_version.Major >= 3)
{
key_file = FindKeyFile (file);
use_pack_keyfile = key_file != null;
@@ -139,51 +126,45 @@ namespace GameRes.Formats.Qlie
if (use_pack_keyfile)
arc_key = QueryEncryption (file);
// use_pack_keyfile = null != arc_key;
var key_data = file.View.ReadBytes (file.MaxOffset-0x41C, 0x100);
name_key = GenerateKey (key_data) & 0x0FFFFFFFu;
}
var enc = QlieEncryption.Create (file, pack_version, arc_key);
var name_buffer = new byte[0x100];
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
using (var index = file.CreateStream (index_offset))
{
int name_length = file.View.ReadUInt16 (index_offset);
if (name_length > name_buffer.Length)
name_buffer = new byte[name_length];
if (name_length != file.View.Read (index_offset+2, name_buffer, 0, (uint)name_length))
return null;
int key = name_length + ((int)name_key ^ 0x3e);
for (int k = 0; k < name_length; ++k)
name_buffer[k] ^= (byte)(((k + 1) ^ key) + k + 1);
string name = Encodings.cp932.GetString (name_buffer, 0, name_length);
var entry = FormatCatalog.Instance.Create<QlieEntry> (name);
if (use_pack_keyfile)
entry.RawName = name_buffer.Take (name_length).ToArray();
index_offset += 2 + name_length;
entry.Offset = file.View.ReadInt64 (index_offset);
entry.Size = file.View.ReadUInt32 (index_offset+8);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
entry.UnpackedSize = file.View.ReadUInt32 (index_offset+12);
entry.IsPacked = 0 != file.View.ReadInt32 (index_offset+0x10);
entry.IsEncrypted = 0 != file.View.ReadInt32 (index_offset+0x14);
entry.Hash = file.View.ReadUInt32 (index_offset+0x18);
entry.KeyFile = key_file;
if (3 == pack_version && use_pack_keyfile && entry.Name.Contains ("pack_keyfile"))
for (int i = 0; i < count; ++i)
{
// note that 'pack_keyfile' itself is encrypted using 'key.fkey' file contents.
key_file = ReadEntryBytes (file, entry, name_key, arc_key);
int name_length = index.ReadUInt16();
if (enc.IsUnicode)
name_length *= 2;
if (name_length > name_buffer.Length)
name_buffer = new byte[name_length];
if (name_length != index.Read (name_buffer, 0, name_length))
return null;
var name = enc.DecryptName (name_buffer, name_length);
var entry = FormatCatalog.Instance.Create<QlieEntry> (name);
if (use_pack_keyfile)
entry.RawName = name_buffer.Take (name_length).ToArray();
entry.Offset = index.ReadInt64(); // [+00]
entry.Size = index.ReadUInt32(); // [+08]
if (!entry.CheckPlacement (file.MaxOffset))
return null;
entry.UnpackedSize = index.ReadUInt32(); // [+0C]
entry.IsPacked = 0 != index.ReadInt32(); // [+10]
entry.IsEncrypted = 0 != index.ReadInt32(); // [+14]
entry.Hash = index.ReadUInt32(); // [+18]
entry.KeyFile = key_file;
if (3 == pack_version.Major && use_pack_keyfile && entry.Name.Contains ("pack_keyfile"))
{
// note that 'pack_keyfile' itself is encrypted using 'key.fkey' file contents.
key_file = ReadEntryBytes (file, entry, enc);
}
dir.Add (entry);
}
dir.Add (entry);
index_offset += 0x1c;
}
if (pack_version < 3)
name_key = 0;
return new QlieArchive (file, this, dir, name_key, arc_key);
return new QlieArchive (file, this, dir, enc);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
@@ -192,125 +173,27 @@ namespace GameRes.Formats.Qlie
var qarc = arc as QlieArchive;
if (null == qent || null == qarc || (!qent.IsEncrypted && !qent.IsPacked))
return arc.File.CreateStream (entry.Offset, entry.Size);
var data = ReadEntryBytes (arc.File, qent, qarc.Hash, qarc.GameKeyData);
var data = ReadEntryBytes (arc.File, qent, qarc.Encryption);
return new BinMemoryStream (data, entry.Name);
}
private byte[] ReadEntryBytes (ArcView file, QlieEntry entry, uint hash, byte[] game_key)
private byte[] ReadEntryBytes (ArcView file, QlieEntry entry, IEncryption enc)
{
var data = file.View.ReadBytes (entry.Offset, entry.Size);
if (entry.IsEncrypted)
{
if (entry.KeyFile != null)
DecryptV3 (data, 0, data.Length, entry.RawName, hash, entry.KeyFile, game_key);
else
Decrypt (data, 0, data.Length, hash);
enc.DecryptEntry (data, 0, data.Length, entry);
}
if (entry.IsPacked)
{
var unpacked = Decompress (data);
if (null != unpacked)
data = unpacked;
data = Decompress (data) ?? data;
}
return data;
}
private void Decrypt (byte[] buffer, int offset, int length, uint key)
{
if (offset < 0)
throw new ArgumentOutOfRangeException ("offset");
if (length > buffer.Length || offset > buffer.Length - length)
throw new ArgumentOutOfRangeException ("length");
ulong hash = 0xA73C5F9DA73C5F9Dul;
ulong xor = ((uint)length + key) ^ 0xFEC9753Eu;
xor |= xor << 32;
unsafe
{
fixed (byte* raw = buffer)
{
ulong* encoded = (ulong*)(raw + offset);
for (int i = 0; i < length / 8; ++i)
{
hash = MMX.PAddD (hash, 0xCE24F523CE24F523ul) ^ xor;
xor = *encoded ^ hash;
*encoded++ = xor;
}
}
}
}
private void DecryptV3 (byte[] data, int offset, int length, byte[] file_name,
uint arc_hash, byte[] key_file, byte[] game_key)
{
// play it safe with 'unsafe' sections
if (offset < 0)
throw new ArgumentOutOfRangeException ("offset");
if (length > data.Length || offset > data.Length - length)
throw new ArgumentOutOfRangeException ("length");
if (length < 8)
return;
uint hash = 0x85F532;
uint seed = 0x33F641;
for (uint i = 0; i < file_name.Length; i++)
{
hash += (i & 0xFF) * file_name[i];
seed ^= hash;
}
seed += arc_hash ^ (7 * ((uint)data.Length & 0xFFFFFF) + (uint)data.Length
+ hash + (hash ^ (uint)data.Length ^ 0x8F32DCu));
seed = 9 * (seed & 0xFFFFFF);
if (game_key != null)
seed ^= 0x453A;
var mt = new QlieMersenneTwister (seed);
if (key_file != null)
mt.XorState (key_file);
if (game_key != null)
mt.XorState (game_key);
// game code fills dword[41] table, but only the first 16 qwords are used
ulong[] table = new ulong[16];
for (int i = 0; i < table.Length; ++i)
table[i] = mt.Rand64();
// compensate for 9 discarded dwords
for (int i = 0; i < 9; ++i)
mt.Rand();
ulong hash64 = mt.Rand64();
uint t = mt.Rand() & 0xF;
unsafe
{
fixed (byte* raw_data = &data[offset])
{
ulong* data64 = (ulong*)raw_data;
int qword_length = length / 8;
for (int i = 0; i < qword_length; ++i)
{
hash64 = MMX.PAddD (hash64 ^ table[t], table[t]);
ulong d = data64[i] ^ hash64;
data64[i] = d;
hash64 = MMX.PAddB (hash64, d) ^ d;
hash64 = MMX.PAddW (MMX.PSllD (hash64, 1), d);
t++;
t &= 0xF;
}
}
}
}
internal static byte[] Decompress (byte[] input)
{
if (LittleEndian.ToUInt32 (input, 0) != 0xFF435031)
if (LittleEndian.ToUInt32 (input, 0) != 0xFF435031) // '1PC\xFF'
return null;
bool is_16bit = 0 != (input[4] & 1);
@@ -393,25 +276,6 @@ namespace GameRes.Formats.Qlie
return output;
}
uint GenerateKey (byte[] key_data)
{
ulong hash = 0;
ulong key = 0;
unsafe
{
fixed (byte* data = key_data)
{
ulong* data64 = (ulong*)data;
for (int i = key_data.Length / 8; i > 0; --i)
{
hash = MMX.PAddW (hash, 0x0307030703070307);
key = MMX.PAddW (key, *data64++ ^ hash);
}
}
}
return (uint)(key ^ (key >> 32));
}
public override ResourceOptions GetDefaultOptions ()
{
return new QlieOptions {