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(WARC): another IDecryptExtra implementation.

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This commit is contained in:
morkt 2018-02-28 11:42:41 +04:00
parent 1229fd744b
commit 14c0481c1b
1 changed files with 37 additions and 0 deletions
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37
ArcFormats/ShiinaRio/WarcEncryption.cs
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@ -1181,4 +1181,41 @@ namespace GameRes.Formats.ShiinaRio
data[index + 0x104] ^= count_FF;
}
}
[Serializable]
public class UshimitsuCrypt : IDecryptExtra
{
protected readonly uint m_key;
public UshimitsuCrypt (uint key)
{
m_key = key;
}
public void Decrypt (byte[] data, int index, uint length, uint flags)
{
if ((flags & 0x204) == 0x204)
DoCrypt (data, index, length);
}
public void Encrypt (byte[] data, int index, uint length, uint flags)
{
if ((flags & 0x104) == 0x104)
DoCrypt (data, index, length);
}
unsafe void DoCrypt (byte[] data, int index, uint length)
{
if (length < 0x100)
return;
fixed (byte* data8 = &data[index])
{
uint* data32 = (uint*)data8;
for (int i = 0; i < 0x40; ++i)
{
data32[i] ^= m_key;
}
}
}
}
}