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feat: vndat decrypt

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scientificworld
2026-04-18 13:10:21 +08:00
parent b9d9f5be3f
commit 74d00dac9a
1 changed files with 20 additions and 1 deletions
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21
ArcFormats/PkWare/ArcZIP.cs
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@@ -100,6 +100,14 @@ namespace GameRes.Formats.PkWare
static readonly byte[] PkDirSignature = { (byte)'P', (byte)'K', 5, 6 };
static readonly byte[] VnDatHeaderKey = {
0x64, 0x36, 0x63, 0x35, 0x66,
0x4B, 0x49, 0x33, 0x47, 0x67,
0x42, 0x57, 0x70, 0x5A, 0x46,
0x33, 0x54, 0x7A, 0x36, 0x69,
0x61, 0x33, 0x6B, 0x46, 0x30
};
public ZipOpener ()
{
Settings = new[] { ZipEncoding };
@@ -148,7 +156,18 @@ namespace GameRes.Formats.PkWare
{
var zarc = (PkZipArchive)arc;
var zent = (ZipEntry)entry;
return zarc.Native.GetInputStream (zent.NativeEntry);
var input = zarc.Native.GetInputStream (zent.NativeEntry);
if (!zarc.File.Name.HasExtension (".vndat"))
return input;
var data = new byte[zent.UnpackedSize];
using (input)
input.Read (data, 0, data.Length);
for (int i = 1; i <= Math.Min (data.Length, 99); i++)
data[data.Length - i] ^= VnDatHeaderKey[i % VnDatHeaderKey.Length];
if (data.Length >= 100)
for (int i = 0; i < 100; i++)
data[i] ^= VnDatHeaderKey[i % VnDatHeaderKey.Length];
return new BinMemoryStream (data, zent.Name);
}
/// <summary>