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fix: (LPK) properly decrypt script file in patch

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Tested on Nekonade Distortion: Ren'ai Jishou no Dead End and Sakura Synchronicity.

Actually idk what the extra flag represents, but seems that only patch files use it.
This commit is contained in:
scientificworld
2026-01-16 16:40:12 +08:00
parent 3f22faca3d
commit fa6d6c9c22
1 changed files with 3 additions and 4 deletions
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7
ArcFormats/Lucifen/ArcLPK.cs
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@@ -122,6 +122,7 @@ namespace GameRes.Formats.Lucifen
public bool IsEncrypted; public bool IsEncrypted;
public bool PackedEntries; public bool PackedEntries;
public bool WholeCrypt; public bool WholeCrypt;
public bool IsPatchFile;
public uint Key; public uint Key;
public byte[] Prefix; public byte[] Prefix;
} }
@@ -206,7 +207,7 @@ namespace GameRes.Formats.Lucifen
{ {
input.Read (data, 0, data.Length); input.Read (data, 0, data.Length);
} }
if (larc.Info.WholeCrypt) if (larc.Info.WholeCrypt && !(larc.Info.IsPatchFile && lent.Name.HasExtension ("elg")))
{ {
larc.Scheme.DecryptContent (data); larc.Scheme.DecryptContent (data);
} }
@@ -257,15 +258,13 @@ namespace GameRes.Formats.Lucifen
IsEncrypted = 0 != (flags & 4), IsEncrypted = 0 != (flags & 4),
PackedEntries = 0 != (flags & 8), PackedEntries = 0 != (flags & 8),
WholeCrypt = 0 != (flags & 0x10), WholeCrypt = 0 != (flags & 0x10),
IsPatchFile = 0 != (flags & 0x20),
Key = key1 Key = key1
}; };
var reader = new IndexReader (lpk_info); var reader = new IndexReader (lpk_info);
var dir = reader.Read (index); var dir = reader.Read (index);
if (null == dir) if (null == dir)
return null; return null;
// this condition is fishy, probably patch files have additional bitflag set
if (lpk_info.WholeCrypt && Binary.AsciiEqual (basename, "PATCH"))
lpk_info.WholeCrypt = false;
return new LuciArchive (file, this, dir, scheme, reader.Info); return new LuciArchive (file, this, dir, scheme, reader.Info);
} }