public unsafe static bool EncryptXtea(OutputMessage msg, uint[] key)
{
if (key == null)
{
return(false);
}
int pad = msg.Length % 8;
if (pad > 0)
msg.AddPaddingBytes(8 - pad);
fixed(byte *bufferPtr = msg.Buffer)
{
uint *words = (uint *)(bufferPtr + msg.HeaderPosition);
for (int pos = 0; pos < msg.Length / 4; pos += 2)
{
uint x_sum = 0, x_delta = 0x9e3779b9, x_count = 32;
while (x_count-- > 0)
{
words[pos] += (words[pos + 1] << 4 ^ words[pos + 1] >> 5) + words[pos + 1] ^ x_sum
+ key[x_sum & 3];
x_sum += x_delta;
words[pos + 1] += (words[pos] << 4 ^ words[pos] >> 5) + words[pos] ^ x_sum
+ key[x_sum >> 11 & 3];
}
}
}
return(true);
}
