public static void *memcpy(void *src, void *dest, int count)
{
if (dest == null || src == null)
{
return(null);
}
if (dest == src && count <= 0)
{
return(dest);
}
BufferExtension.BlockCopy((byte *)src, 0, (byte *)dest, count);
return(dest);
}
private byte[] CopyBuffer(byte[] value, int ofs, int len)
{
if ((ofs + len) > value.Length)
{
len = (value.Length - ofs);
}
if (ofs < 0 || ofs >= len)
{
len = 0;
}
byte[] cch = new byte[len];
BufferExtension.BlockCopy(value, ofs, cch);
return(cch);
}
private void Inversion(string key, byte[] sbox, byte *num, int len)
{
byte[] vk = new byte[sbox.Length];
BufferExtension.BlockCopy(sbox, vk, vk.Length);
for (int i = 0, low = 0, high = 0, mid; i < len; i++)
{
low = (low + key.Length) % MaxbitWidth;
high = (high + vk[i % MaxbitWidth]) % MaxbitWidth;
byte b = vk[low];
vk[low] = vk[high];
vk[high] = b;
mid = (vk[low] + vk[high]) % MaxbitWidth;
num[i] ^= (byte)vk[mid];
}
}
