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implemented Marble scripts decryption.

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morkt
2015-06-04 01:13:25 +04:00
parent 8849508e41
commit 2da5ed1961
10 changed files with 155 additions and 8 deletions
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87
ArcFormats/ArcMBL.cs
View File

@@ -28,10 +28,28 @@ using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
using GameRes.Formats.Properties;
using GameRes.Formats.Strings;
using GameRes.Utility;
namespace GameRes.Formats.Marble
{
public class MblOptions : ResourceOptions
{
public string PassPhrase;
}
public class MblArchive : ArcFile
{
public readonly byte[] Key;
public MblArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, string password)
: base (arc, impl, dir)
{
Key = Encodings.cp932.GetBytes (password);
}
}
[Export(typeof(ArchiveFormat))]
public class MblOpener : ArchiveFormat
{
@@ -64,6 +82,7 @@ namespace GameRes.Formats.Marble
return null;
try
{
bool contains_scripts = false;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
@@ -79,13 +98,22 @@ namespace GameRes.Formats.Marble
name = name.ToLowerInvariant();
index_offset += (uint)filename_len;
uint offset = file.View.ReadUInt32 (index_offset);
var entry = new AutoEntry (name, () => {
uint signature = file.View.ReadUInt32 (offset);
var res = FormatCatalog.Instance.LookupSignature (signature);
if (!res.Any() && 0x4259 == (0xffff & signature))
res = FormatCatalog.Instance.ImageFormats.Where (x => x.Tag == "PRS");
return res.FirstOrDefault();
});
Entry entry;
if (name.EndsWith (".s"))
{
entry = new Entry { Name = name, Type = "script" };
contains_scripts = true;
}
else
{
entry = new AutoEntry (name, () => {
uint signature = file.View.ReadUInt32 (offset);
var res = FormatCatalog.Instance.LookupSignature (signature);
if (!res.Any() && 0x4259 == (0xffff & signature))
res = FormatCatalog.Instance.ImageFormats.Where (x => x.Tag == "PRS");
return res.FirstOrDefault();
});
}
entry.Offset = offset;
entry.Size = file.View.ReadUInt32 (index_offset+4);
if (offset < index_size || !entry.CheckPlacement (file.MaxOffset))
@@ -95,6 +123,12 @@ namespace GameRes.Formats.Marble
}
if (0 == dir.Count)
return null;
if (contains_scripts)
{
var options = Query<MblOptions> ("Archive contains encrypted scripts.\nChoose encryption scheme or enter a passphrase.");
if (options.PassPhrase.Length > 0)
return new MblArchive (file, this, dir, options.PassPhrase);
}
return new ArcFile (file, this, dir);
}
catch
@@ -102,5 +136,44 @@ namespace GameRes.Formats.Marble
return null;
}
}
public static Dictionary<string, string> KnownKeys = new Dictionary<string, string> {
{ arcStrings.ArcDefault, "" },
{ "Chikatetsu Fuusa Jiken", "naze" }
};
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (entry.Type != "script" || !entry.Name.EndsWith (".s"))
return arc.File.CreateStream (entry.Offset, entry.Size);
var marc = arc as MblArchive;
var data = new byte[entry.Size];
arc.File.View.Read (entry.Offset, data, 0, entry.Size);
if (null == marc || null == marc.Key)
{
for (int i = 0; i < data.Length; ++i)
{
data[i] = (byte)-data[i];
}
}
else
{
for (int i = 0; i < data.Length; ++i)
{
data[i] ^= marc.Key[i % marc.Key.Length];
}
}
return new MemoryStream (data);
}
public override ResourceOptions GetDefaultOptions ()
{
return new MblOptions { PassPhrase = Settings.Default.MBLPassPhrase };
}
public override object GetAccessWidget ()
{
return new GUI.WidgetMBL();
}
}
}