Function append_int

freebsd/crypto/aesni/aesni_ccm.c:72–83

* Put value at the end of block, starting at offset. * (This goes backwards, putting bytes in *until* it * reaches offset.) */

 * reaches offset.)
 */
static void
append_int(size_t value, __m128i *block, size_t offset)
{
	int indx = sizeof(*block) - 1;
	uint8_t *bp = (uint8_t*)block;

	while (indx > (sizeof(*block) - offset)) {
		bp[indx] = value & 0xff;
		indx--;
		value >>= 8;
	}
}

/*
 * Start the CBC-MAC process.  This handles the auth data.