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(HybridCrypt): another kirikiri encryption scheme.

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morkt
2019-03-26 22:35:24 +04:00
parent ec361833de
commit 65a1f15330
1 changed files with 23 additions and 0 deletions
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23
ArcFormats/KiriKiri/CryptAlgorithms.cs
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@@ -1345,4 +1345,27 @@ namespace GameRes.Formats.KiriKiri
return ((bit_count & 0xF) + ((bit_count >> 4) & 0xF)) & 0xF;
}
}
[Serializable]
public class HybridCrypt : ICrypt
{
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
{
return (byte)(value ^ (entry.Hash >> 5));
}
public override void Decrypt (Xp3Entry entry, long offset, byte[] buffer, int pos, int count)
{
byte key = (byte)(entry.Hash >> 5);
for (int i = 0; i < count; ++i, ++offset)
{
buffer[pos+i] ^= key;
}
}
public override void Encrypt (Xp3Entry entry, long offset, byte[] buffer, int pos, int count)
{
Decrypt (entry, offset, buffer, pos, count);
}
}
}