/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 */


#include <sys/errno.h>
#include <sys/types.h>
#include <sys/kmem.h>
#include <sys/cmn_err.h>
#include <sys/sysmacros.h>
#include <sys/crypto/common.h>
#include <sys/crypto/impl.h>
#include <sys/crypto/api.h>
#include <sys/crypto/spi.h>
#include <sys/crypto/sched_impl.h>

#define CRYPTO_OPS_OFFSET(f)            offsetof(crypto_ops_t, co_##f)
#define CRYPTO_OBJECT_OFFSET(f)         offsetof(crypto_object_ops_t, f)
#define CRYPTO_SESSION_OFFSET(f)        offsetof(crypto_session_ops_t, f)

int
crypto_session_open(crypto_provider_t provider, crypto_session_id_t *sidp,
crypto_call_req_t *crq)
{
        kcf_req_params_t params;
        kcf_provider_desc_t *real_provider;
        kcf_provider_desc_t *pd = provider;

        ASSERT(KCF_PROV_REFHELD(pd));

        /* find a provider that supports session ops */
        (void) kcf_get_hardware_provider_nomech(CRYPTO_OPS_OFFSET(session_ops),
            CRYPTO_SESSION_OFFSET(session_open), pd, &real_provider);

        if (real_provider != NULL) {
                int rv;

                ASSERT(real_provider == pd ||
                    pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER);

                if (CHECK_FASTPATH(crq, pd)) {
                        rv = KCF_PROV_SESSION_OPEN(real_provider, sidp,
                            KCF_SWFP_RHNDL(crq), pd);
                        KCF_PROV_INCRSTATS(pd, rv);
                } else {
                        KCF_WRAP_SESSION_OPS_PARAMS(&params,
                            KCF_OP_SESSION_OPEN, sidp, 0, CRYPTO_USER, NULL,
                            0, pd);
                        rv = kcf_submit_request(real_provider, NULL, crq,
                            &params, B_FALSE);
                }
                KCF_PROV_REFRELE(real_provider);

                if (rv != CRYPTO_SUCCESS) {
                        return (rv);
                }
        }
        return (CRYPTO_SUCCESS);
}

int
crypto_session_close(crypto_provider_t provider, crypto_session_id_t sid,
    crypto_call_req_t *crq)
{
        int rv;
        kcf_req_params_t params;
        kcf_provider_desc_t *real_provider;
        kcf_provider_desc_t *pd = provider;

        if (pd == NULL)
                return (CRYPTO_ARGUMENTS_BAD);

        ASSERT(KCF_PROV_REFHELD(pd));

        /* find a provider that supports session ops */
        (void) kcf_get_hardware_provider_nomech(CRYPTO_OPS_OFFSET(session_ops),
            CRYPTO_SESSION_OFFSET(session_close), pd, &real_provider);

        ASSERT(real_provider == pd ||
            pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER);

        /* edge case is where the logical provider has no members */
        if (real_provider != NULL) {
                /* The fast path for SW providers. */
                if (CHECK_FASTPATH(crq, pd)) {
                        rv = KCF_PROV_SESSION_CLOSE(real_provider,
                            sid, KCF_SWFP_RHNDL(crq), pd);
                        KCF_PROV_INCRSTATS(pd, rv);
                } else {
                        KCF_WRAP_SESSION_OPS_PARAMS(&params,
                            KCF_OP_SESSION_CLOSE, NULL, sid,
                            CRYPTO_USER, NULL, 0, pd);
                        rv = kcf_submit_request(real_provider, NULL, crq,
                            &params, B_FALSE);
                }
                KCF_PROV_REFRELE(real_provider);
        }
        return (CRYPTO_SUCCESS);
}

int
crypto_session_login(crypto_provider_t provider, crypto_session_id_t sid,
    crypto_user_type_t type, char *pin, ulong_t len, crypto_call_req_t *crq)
{
        kcf_req_params_t params;
        kcf_provider_desc_t *pd = provider;
        kcf_provider_desc_t *real_provider = pd;
        int rv;

        ASSERT(KCF_PROV_REFHELD(pd));

        if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
                rv = kcf_get_hardware_provider_nomech(CRYPTO_OPS_OFFSET(
                    session_ops), CRYPTO_SESSION_OFFSET(session_login),
                    pd, &real_provider);

                if (rv != CRYPTO_SUCCESS)
                        return (rv);
        }

        if (CHECK_FASTPATH(crq, real_provider)) {
                rv = KCF_PROV_SESSION_LOGIN(real_provider, sid,
                    type, pin, len, KCF_SWFP_RHNDL(crq));
                KCF_PROV_INCRSTATS(pd, rv);
        } else {
                KCF_WRAP_SESSION_OPS_PARAMS(&params, KCF_OP_SESSION_LOGIN,
                    NULL, sid, type, pin, len, real_provider);
                rv = kcf_submit_request(real_provider, NULL, crq,
                    &params, B_FALSE);
        }
        if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
                KCF_PROV_REFRELE(real_provider);

        return (rv);
}

int
crypto_session_logout(crypto_provider_t provider, crypto_session_id_t sid,
    crypto_call_req_t *crq)
{
        kcf_req_params_t params;
        kcf_provider_desc_t *pd = provider;
        kcf_provider_desc_t *real_provider = pd;
        int rv;

        ASSERT(KCF_PROV_REFHELD(pd));

        if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
                rv = kcf_get_hardware_provider_nomech(CRYPTO_OPS_OFFSET(
                    session_ops), CRYPTO_SESSION_OFFSET(session_logout),
                    pd, &real_provider);

                if (rv != CRYPTO_SUCCESS)
                        return (rv);
        }

        if (CHECK_FASTPATH(crq, real_provider)) {
                rv = KCF_PROV_SESSION_LOGOUT(real_provider, sid,
                    KCF_SWFP_RHNDL(crq));
                KCF_PROV_INCRSTATS(pd, rv);
        } else {
                KCF_WRAP_SESSION_OPS_PARAMS(&params, KCF_OP_SESSION_LOGOUT,
                    NULL, sid, 0, NULL, 0, real_provider);
                rv = kcf_submit_request(real_provider, NULL, crq,
                    &params, B_FALSE);
        }
        if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
                KCF_PROV_REFRELE(real_provider);

        return (rv);
}