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(ScrPlayer): implemented 'pac2' archives.
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commit
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@ -23,6 +23,7 @@
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// IN THE SOFTWARE.
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// IN THE SOFTWARE.
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//
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//
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using System;
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using System.Collections.Generic;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.ComponentModel.Composition;
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@ -37,34 +38,71 @@ namespace GameRes.Formats.ScrPlayer
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public override bool IsHierarchic { get { return false; } }
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public override bool IsHierarchic { get { return false; } }
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public override bool CanWrite { get { return false; } }
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public override bool CanWrite { get { return false; } }
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public PakOpener ()
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{
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Signatures = new uint[] { 0x6B636170, 0x32636170 }; // 'pack', 'pac2'
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}
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public override ArcFile TryOpen (ArcView file)
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public override ArcFile TryOpen (ArcView file)
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{
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{
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uint index_size = file.View.ReadUInt32 (4);
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uint index_size = file.View.ReadUInt32 (4);
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if (index_size < 0x10 || index_size >= file.MaxOffset)
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if (index_size < 0x10 || index_size >= file.MaxOffset)
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return null;
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return null;
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IBinaryStream index;
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uint index_offset = 8;
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bool is_encrypted = file.View.ReadByte (3) == '2';
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uint index_end = index_offset + index_size;
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if (is_encrypted)
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var dir = new List<Entry>();
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while (index_offset < index_end)
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{
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{
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uint offset = file.View.ReadUInt32 (index_offset);
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var index_bytes = new byte[(index_size + 3) & ~3u];
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if (0 == offset)
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file.View.Read (8, index_bytes, 0, index_size);
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break;
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DecryptIndex (index_bytes, (int)index_size);
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uint size = file.View.ReadUInt32 (index_offset+4);
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index = new BinMemoryStream (index_bytes, 0, (int)index_size, file.Name);
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byte name_length = file.View.ReadByte (index_offset+8);
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}
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var name = file.View.ReadString (index_offset+9, name_length);
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else
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index_offset += ((9u + name_length) & ~7u) + 8u;
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index = file.CreateStream (8, index_size);
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if (index_offset > index_end)
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using (index)
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return null;
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{
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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uint index_pos = 0;
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entry.Offset = offset;
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var dir = new List<Entry>();
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entry.Size = size;
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while (index_pos < index_size)
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dir.Add (entry);
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{
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index.Position = index_pos;
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uint offset = index.ReadUInt32();
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if (0 == offset)
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break;
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uint size = index.ReadUInt32();
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byte name_length = index.ReadUInt8 ();
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var name = index.ReadCString (name_length);
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index_pos += ((5u + name_length) & ~3u) + 8u;
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = offset;
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entry.Size = size;
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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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}
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if (0 == dir.Count)
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return null;
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return new ArcFile (file, this, dir);
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}
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}
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if (0 == dir.Count)
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return null;
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return new ArcFile (file, this, dir);
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}
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}
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unsafe void DecryptIndex (byte[] data, int length)
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{
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int aligned_count = ((length - 1) >> 2) + 1;
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if (aligned_count * 4 > length)
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throw new ArgumentException ("Can't decrypt non-aligned array.");
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fixed (byte* data8 = data)
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{
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uint* data32 = (uint*)data8;
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for (int i = 0; i < aligned_count; ++i)
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*data32++ ^= EncryptionKey[i & 7];
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}
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}
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static readonly uint[] EncryptionKey = {
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0x305325A0, 0x306F308C, 0x672C5742, 0x5C0B5343,
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0x8457306E, 0x72694F5C, 0x30423067, 0x0000308B,
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};
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}
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}
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}
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}
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