lifegpc/GARbro-crskycode
1
0
Fork 0
mirror of https://github.com/crskycode/GARbro.git synced 2026-07-08 01:30:18 +08:00
Code Issues Packages Projects Releases Wiki Activity

(ShiinaRio): additional encryption scheme.

Browse Source
This commit is contained in:
morkt
2016-08-27 21:17:30 +04:00
parent ce0284300a
commit 6bd04f5bc6
2 changed files with 58 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
ArcFormats/ShiinaRio/WarcEncryption.cs
View File

@@ -722,4 +722,53 @@ namespace GameRes.Formats.ShiinaRio
}
}
}
[Serializable]
public class DodakureCrypt : IDecryptExtra
{
public void Decrypt (byte[] data, int index, uint length, uint flags)
{
if (length < 0x200)
return;
if ((flags & 0x204) == 0x204)
{
if (0x718E958D == LittleEndian.ToUInt32 (data, index))
{
var input = new byte[0x200];
Buffer.BlockCopy (data, index, input, 0, 0x200);
int remaining = LittleEndian.ToInt32 (input, 8);
int src = 12;
int dst = index;
bool rle = false;
while (remaining > 0)
{
int count = input[src++];
if (rle)
{
byte v = data[dst-1];
for (int i = 0; i < count; ++i)
data[dst++] = v;
}
else
{
Buffer.BlockCopy (input, src, data, dst, count);
src += count;
dst += count;
}
remaining -= count;
if (count < 0xFF)
rle = !rle;
}
}
if (length > 0x200)
data[index + 0x200] ^= (byte)length;
if (length > 0x201)
data[index + 0x201] ^= (byte)(length >> 8);
if (length > 0x202)
data[index + 0x202] ^= (byte)(length >> 16);
if (length > 0x203)
data[index + 0x203] ^= (byte)(length >> 24);
}
}
}
}