Function ccp_newsession

freebsd/crypto/ccp/ccp.c:402–514

}

static int
ccp_newsession(device_t dev, crypto_session_t cses,
    const struct crypto_session_params *csp)
{
	struct ccp_softc *sc;
	struct ccp_session *s;
	struct auth_hash *auth_hash;
	enum ccp_aes_mode cipher_mode;
	unsigned auth_mode;
	unsigned q;

	/* XXX reconcile auth_mode with use by ccp_sha */
	switch (csp->csp_auth_alg) {
	case CRYPTO_SHA1_HMAC:
		auth_hash = &auth_hash_hmac_sha1;
		auth_mode = SHA1;
		break;
	case CRYPTO_SHA2_256_HMAC:
		auth_hash = &auth_hash_hmac_sha2_256;
		auth_mode = SHA2_256;
		break;
	case CRYPTO_SHA2_384_HMAC:
		auth_hash = &auth_hash_hmac_sha2_384;
		auth_mode = SHA2_384;
		break;
	case CRYPTO_SHA2_512_HMAC:
		auth_hash = &auth_hash_hmac_sha2_512;
		auth_mode = SHA2_512;
		break;
	default:
		auth_hash = NULL;
		auth_mode = 0;
		break;
	}

	switch (csp->csp_cipher_alg) {
	case CRYPTO_AES_CBC:
		cipher_mode = CCP_AES_MODE_CBC;
		break;
	case CRYPTO_AES_ICM:
		cipher_mode = CCP_AES_MODE_CTR;
		break;
	case CRYPTO_AES_NIST_GCM_16:
		cipher_mode = CCP_AES_MODE_GCTR;
		break;
	case CRYPTO_AES_XTS:
		cipher_mode = CCP_AES_MODE_XTS;
		break;
	default:
		cipher_mode = CCP_AES_MODE_ECB;
		break;
	}

	sc = device_get_softc(dev);
	mtx_lock(&sc->lock);
	if (sc->detaching) {
		mtx_unlock(&sc->lock);
		return (ENXIO);