Function cryptocteon_process

freebsd/mips/cavium/cryptocteon/cryptocteon.c:244–403

* Process a request. */

 * Process a request.
 */
static int
cryptocteon_process(device_t dev, struct cryptop *crp, int hint)
{
	const struct crypto_session_params *csp;
	struct octo_sess *od;
	size_t iovcnt, iovlen;
	struct mbuf *m = NULL;
	struct uio *uiop = NULL;
	unsigned char *ivp = NULL;
	unsigned char iv_data[16];
	unsigned char icv[SHA1_HASH_LEN], icv2[SHA1_HASH_LEN];
	int auth_off, auth_len, crypt_off, crypt_len;
	struct cryptocteon_softc *sc;

	sc = device_get_softc(dev);

	crp->crp_etype = 0;

	od = crypto_get_driver_session(crp->crp_session);
	csp = crypto_get_params(crp->crp_session);

	/*
	 * The crypto routines assume that the regions to auth and
	 * cipher are exactly 8 byte multiples and aligned on 8
	 * byte logical boundaries within the iovecs.
	 */
	if (crp->crp_aad_length % 8 != 0 || crp->crp_payload_length % 8 != 0) {
		crp->crp_etype = EFBIG;
		goto done;
	}

	/*
	 * As currently written, the crypto routines assume the AAD and
	 * payload are adjacent.
	 */
	if (crp->crp_aad_length != 0 && crp->crp_payload_start !=
	    crp->crp_aad_start + crp->crp_aad_length) {
		crp->crp_etype = EFBIG;
		goto done;
	}

	crypt_off = crp->crp_payload_start;
	crypt_len = crp->crp_payload_length;
	if (crp->crp_aad_length != 0) {
		auth_off = crp->crp_aad_start;
		auth_len = crp->crp_aad_length + crp->crp_payload_length;
	} else {
		auth_off = crypt_off;
		auth_len = crypt_len;
	}

	/*
	 * do some error checking outside of the loop for m and IOV processing
	 * this leaves us with valid m or uiop pointers for later
	 */
	switch (crp->crp_buf.cb_type) {
	case CRYPTO_BUF_MBUF:
	{