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(BoxOpener): various versions support.

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This commit is contained in:
morkt 2016-05-20 03:55:08 +04:00
parent be6825bf07
commit 3664e9f0a7
1 changed files with 117 additions and 2 deletions
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119
ArcFormats/Aoi/ArcBOX.cs
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@ -27,6 +27,7 @@ using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Security.Cryptography;
using GameRes.Utility;
namespace GameRes.Formats.Aoi
{
@ -50,19 +51,44 @@ namespace GameRes.Formats.Aoi
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
static readonly Dictionary<int, byte> VersionKeyMap = new Dictionary<int, byte> {
{ 5, 0xAD },
{ 6, 0xB4 },
{ 7, 0xB4 },
{ 10, 0xB2 },
{ 12, 0xA5 },
};
public override ArcFile TryOpen (ArcView file)
{
int version;
if (file.View.AsciiEqual (4, "X10"))
version = 10;
else if (file.View.AsciiEqual (4, "X12"))
version = 12;
else if (file.View.AsciiEqual (4, "OX7\0"))
version = 7;
else if (file.View.AsciiEqual (4, "OX6\0"))
version = 6;
else if (file.View.AsciiEqual (4, "OX5 "))
version = 5;
else
return null;
int count = file.View.ReadInt32 (8);
if (!IsSaneCount (count))
return null;
List<Entry> dir;
if (version > 5)
dir = ReadIndexV6 (file, count);
else
dir = ReadIndexV5 (file, count);
if (null == dir)
return null;
return new BoxArchive (file, this, dir, VersionKeyMap[version]);
}
List<Entry> ReadIndexV6 (ArcView file, int count)
{
int index_offset = 0x10;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
@ -78,8 +104,30 @@ namespace GameRes.Formats.Aoi
dir.Add (entry);
index_offset += 0x18;
}
byte key = 7 == version ? (byte)0xB4 : (byte)0xB2;
return new BoxArchive (file, this, dir, key);
return dir;
}
List<Entry> ReadIndexV5 (ArcView file, int count)
{
var base_name = Path.GetFileNameWithoutExtension (file.Name);
int index_offset = 0xC;
uint next_offset = file.View.ReadUInt32 (index_offset);
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
index_offset += 4;
var entry = new Entry {
Name = string.Format ("{0}#{1:D2}.evt", base_name, i),
Type = "script",
Offset = next_offset,
};
next_offset = i+1 == count ? (uint)file.MaxOffset : file.View.ReadUInt32 (index_offset);
entry.Size = next_offset - (uint)entry.Offset;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
return dir;
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
@ -91,4 +139,71 @@ namespace GameRes.Formats.Aoi
return new CryptoStream (input, new XorTransform (barc.Key), CryptoStreamMode.Read);
}
}
[Export(typeof(ArchiveFormat))]
public class AoiMyOpener : ArchiveFormat
{
public override string Tag { get { return "AOIMY"; } }
public override string Description { get { return "Aoi engine script archive"; } }
public override uint Signature { get { return 0x4D494F41; } } // 'AOIM'
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (!file.View.AsciiEqual (4, "Y01\0"))
return null;
int count = Binary.BigEndian (file.View.ReadInt32 (8));
if (!IsSaneCount (count))
return null;
int index_offset = 0x10;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var entry = new Entry {
Name = file.View.ReadString (index_offset, 0x10),
Type = "script",
Offset = Binary.BigEndian (file.View.ReadUInt32 (index_offset+0x10)),
Size = Binary.BigEndian (file.View.ReadUInt32 (index_offset+0x14)),
};
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += 0x18;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
uint offset = (uint)entry.Offset;
for (int i = 0; i < data.Length; ++i)
{
data[i] ^= KeyFromOffset (offset++);
}
return new MemoryStream (data);
}
static byte KeyFromOffset (uint offset)
{
uint v1 = offset - 0x5CC8E9D7u + (0xA3371629u >> (int)((offset & 0xF) + 1)) - (0x5CC8E9D7u << (int)(31 - (offset & 0xF)));
uint v3 = v1 << (int)(31 - ((offset >> 4) & 0xF));
uint v4 = v1 >> (int)(((offset >> 4) & 0xF) + 1);
uint v5 = offset - 0x5CC8E9D7
+ ((offset - 0x5CC8E9D7u + v3 + v4) << (int)(31 - ((offset >> 8) & 0xF)))
+ ((offset - 0x5CC8E9D7u + v3 + v4) >> (int)(((offset >> 8) & 0xF) + 1));
uint v6 = offset - 0x5CC8E9D7u
+ (v5 << (int)(31 - ((offset >> 12) & 0xF))) + (v5 >> (int)(((offset >> 12) & 0xF) + 1));
uint v7 = offset - 0x5CC8E9D7u
+ (v6 << (int)(31 - ((offset >> 16) & 0xF))) + (v6 >> (int)(((offset >> 16) & 0xF) + 1));
int v8 = (int)(offset >> 20) & 0xF;
uint v9 = offset - 0x5CC8E9D7u
+ ((offset - 0x5CC8E9D7u + (v7 << (31 - v8)) + (v7 >> (v8 + 1))) << (int)(31 - ((offset >> 24) & 0xF)))
+ ((offset - 0x5CC8E9D7u + (v7 << (31 - v8)) + (v7 >> (v8 + 1))) >> (int)(((offset >> 24) & 0xF) + 1));
uint key = (offset - 0x5CC8E9D7 + (v9 << (int)(31 - (offset >> 28))) + (v9 >> (int)((offset >> 28) + 1))) >> (int)(offset & 0xF);
return (byte)key;
}
}
}