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(KiriKiri): another encryption scheme.

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This commit is contained in:
morkt 2018-03-21 09:50:49 +04:00
parent 78598f9238
commit 60aa130f09
1 changed files with 33 additions and 0 deletions
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33
ArcFormats/KiriKiri/CryptAlgorithms.cs
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@ -1278,5 +1278,38 @@ namespace GameRes.Formats.KiriKiri
buffer[pos+i] ^= key[key_pos++ % 0x1F];
}
}
public override void Encrypt (Xp3Entry entry, long offset, byte[] buffer, int pos, int count)
{
Decrypt (entry, offset, buffer, pos, count);
}
}
[Serializable]
public class SmxCrypt : ICrypt
{
public override void Decrypt (Xp3Entry entry, long offset, byte[] buffer, int pos, int count)
{
var key = new byte[6] {
(byte)(entry.Hash >> 5),
(byte)(entry.Hash >> 4),
(byte)(entry.Hash >> 3),
(byte)(entry.Hash >> 2),
(byte)(entry.Hash >> 2),
(byte)(entry.Hash >> 3),
};
for (int i = 0; i < count; ++i)
{
if ((offset + i) <= 100)
buffer[pos+i] ^= key[3];
else
buffer[pos+i] ^= key[(int)(offset + i) & 5];
}
}
public override void Encrypt (Xp3Entry entry, long offset, byte[] buffer, int pos, int count)
{
Decrypt (entry, offset, buffer, pos, count);
}
}
}