Function cryptocteon_newsession

freebsd/mips/cavium/cryptocteon/cryptocteon.c:176–239

Generate a new octo session. */

/* Generate a new octo session. */
static int
cryptocteon_newsession(device_t dev, crypto_session_t cses,
    const struct crypto_session_params *csp)
{
	struct cryptocteon_softc *sc;
	struct octo_sess *ocd;

	sc = device_get_softc(dev);

	ocd = crypto_get_driver_session(cses);

	ocd->octo_encklen = csp->csp_cipher_klen;
	if (csp->csp_cipher_key != NULL)
		memcpy(ocd->octo_enckey, csp->csp_cipher_key,
		    ocd->octo_encklen);

	if (csp->csp_auth_key != NULL)
		cryptocteon_calc_hash(csp, csp->csp_auth_key, ocd);

	ocd->octo_mlen = csp->csp_auth_mlen;
	if (csp->csp_auth_mlen == 0) {
		switch (csp->csp_auth_alg) {
		case CRYPTO_SHA1_HMAC:
			ocd->octo_mlen = SHA1_HASH_LEN;
			break;
		}
	}

	switch (csp->csp_mode) {
	case CSP_MODE_DIGEST:
		switch (csp->csp_auth_alg) {
		case CRYPTO_SHA1_HMAC:
			ocd->octo_encrypt = octo_null_sha1_encrypt;
			ocd->octo_decrypt = octo_null_sha1_encrypt;
			break;
		}
		break;
	case CSP_MODE_CIPHER:
		switch (csp->csp_cipher_alg) {
		case CRYPTO_AES_CBC:
			ocd->octo_encrypt = octo_aes_cbc_encrypt;
			ocd->octo_decrypt = octo_aes_cbc_decrypt;
			break;
		}
		break;
	case CSP_MODE_ETA:
		switch (csp->csp_cipher_alg) {
		case CRYPTO_AES_CBC:
			switch (csp->csp_auth_alg) {
			case CRYPTO_SHA1_HMAC:
				ocd->octo_encrypt = octo_aes_cbc_sha1_encrypt;
				ocd->octo_decrypt = octo_aes_cbc_sha1_decrypt;
				break;
			}
			break;
		}
		break;
	}