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(noncolor): added separate methods for archives reading/decryption.

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This commit is contained in:
morkt 2016-12-30 20:48:51 +04:00
parent 7bd33eea60
commit 6b06d4f25f
1 changed files with 73 additions and 68 deletions
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141
ArcFormats/NonColor/ArcDAT.cs
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@ -110,60 +110,17 @@ namespace GameRes.Formats.NonColor
var scheme = QueryScheme (file.Name);
if (null == scheme)
return null;
var file_map = ReadFilenameMap (scheme);
uint index_offset = 4;
int skipped = 0;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
using (var input = file.CreateStream (4, (uint)count * 0x15))
{
ulong hash = file.View.ReadUInt64 (index_offset);
int flags = file.View.ReadByte (index_offset+8) ^ (byte)hash;
uint offset = file.View.ReadUInt32 (index_offset+9) ^ (uint)hash;
uint size = file.View.ReadUInt32 (index_offset+0xD) ^ (uint)hash;
uint unpacked_size = file.View.ReadUInt32 (index_offset+0x11) ^ (uint)hash;
index_offset += 0x15;
string name;
byte[] raw_name = null;
if (file_map.TryGetValue (hash, out raw_name))
foreach (var entry in ReadIndex (input, count, scheme))
{
name = Encodings.cp932.GetString (raw_name);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
else if (2 == flags)
{
name = hash.ToString ("X8");
}
else
{
// System.Diagnostics.Trace.WriteLine ("Unknown hash", hash.ToString ("X8"));
++skipped;
continue;
}
if (flags != 2)
{
offset ^= raw_name[raw_name.Length >> 1];
size ^= raw_name[raw_name.Length >> 2];
unpacked_size ^= raw_name[raw_name.Length >> 3];
}
var entry = new ArcDatEntry {
Name = name,
Type = FormatCatalog.Instance.GetTypeFromName (name),
RawName = raw_name,
Hash = hash,
Flags = flags,
Offset = offset,
Size = size,
UnpackedSize = unpacked_size,
IsPacked = 2 == flags,
};
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
if (skipped != 0)
System.Diagnostics.Trace.WriteLine (string.Format ("Missing {0} names", skipped));
return new ArcDatArchive (file, this, dir, scheme.Hash);
}
@ -177,32 +134,80 @@ namespace GameRes.Formats.NonColor
if (2 == dent.Flags)
{
if (darc.MasterKey != 0)
{
unsafe
{
fixed (byte* data8 = data)
{
uint key = (uint)(dent.Hash ^ darc.MasterKey);
uint* data32 = (uint*)data8;
for (int i = data.Length/4; i > 0; --i)
*data32++ ^= key;
}
}
}
DecryptData (data, (uint)(dent.Hash ^ darc.MasterKey));
return new ZLibStream (new MemoryStream (data), CompressionMode.Decompress);
}
// 1 == dent.Flags
int block_length = data.Length / dent.RawName.Length;
int n = 0;
for (int i = 0; i < dent.RawName.Length-1; ++i)
for (int j = 0; j < block_length; ++j)
data[n++] ^= dent.RawName[i];
if (dent.RawName != null && 0 != dent.Flags)
DecryptWithName (data, dent.RawName);
return new BinMemoryStream (data, entry.Name);
}
internal IEnumerable<ArcDatEntry> ReadIndex (IBinaryStream input, int count, Scheme scheme, uint key = 0)
{
int skipped = 0;
var file_map = ReadFilenameMap (scheme);
for (int i = 0; i < count; ++i)
{
var hash = input.ReadUInt64();
var entry = new ArcDatEntry
{
Hash = hash,
Flags = input.ReadByte() ^ (byte)hash,
Offset = input.ReadUInt32() ^ (uint)hash ^ key,
Size = input.ReadUInt32() ^ (uint)hash,
UnpackedSize = input.ReadUInt32() ^ (uint)hash,
};
entry.IsPacked = 0 != (entry.Flags & 2);
byte[] raw_name = null;
if (file_map.TryGetValue (hash, out raw_name))
{
entry.Name = Encodings.cp932.GetString (raw_name);
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
entry.RawName = raw_name;
}
if (0 == (entry.Flags & 2))
{
if (null == raw_name)
{
// System.Diagnostics.Trace.WriteLine ("Unknown hash", hash.ToString ("X16"));
++skipped;
continue;
}
entry.Offset ^= raw_name[raw_name.Length >> 1];
entry.Size ^= raw_name[raw_name.Length >> 2];
entry.UnpackedSize ^= raw_name[raw_name.Length >> 3];
}
if (string.IsNullOrEmpty (entry.Name))
entry.Name = hash.ToString ("X16");
yield return entry;
}
if (skipped != 0)
System.Diagnostics.Trace.WriteLine (string.Format ("Missing {0} names", skipped), "[noncolor]");
}
internal unsafe void DecryptData (byte[] data, uint key)
{
fixed (byte* data8 = data)
{
uint* data32 = (uint*)data8;
for (int i = data.Length/4; i > 0; --i)
*data32++ ^= key;
}
}
internal void DecryptWithName (byte[] data, byte[] name)
{
int block_length = data.Length / name.Length;
int n = 0;
for (int i = 0; i < name.Length-1; ++i)
for (int j = 0; j < block_length; ++j)
data[n++] ^= name[i];
}
static IDictionary<ulong, Tuple<uint, int>> FileMapIndex = null;
internal IDictionary<ulong, Tuple<uint, int>> ReadIndex (BinaryReader idx)
internal IDictionary<ulong, Tuple<uint, int>> ReadFileMapIndex (BinaryReader idx)
{
int scheme_count = idx.ReadInt32();
idx.BaseStream.Seek (12, SeekOrigin.Current);
@ -230,7 +235,7 @@ namespace GameRes.Formats.NonColor
using (var idx = new BinaryReader (idx_stream))
{
if (null == FileMapIndex)
FileMapIndex = ReadIndex (idx);
FileMapIndex = ReadFileMapIndex (idx);
Tuple<uint, int> nc_info;
if (!FileMapIndex.TryGetValue (scheme.Hash, out nc_info))
@ -263,7 +268,7 @@ namespace GameRes.Formats.NonColor
set { KnownSchemes = ((ArcDatScheme)value).KnownSchemes; }
}
Scheme QueryScheme (string arc_name)
internal Scheme QueryScheme (string arc_name)
{
var title = FormatCatalog.Instance.LookupGame (arc_name);
if (!string.IsNullOrEmpty (title) && KnownSchemes.ContainsKey (title))