/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
 * Authors: Doug Rabson <dfr@rabson.org>
 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/kobj.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>

#include <kgssapi/gssapi.h>
#include <kgssapi/gssapi_impl.h>

#include "gssd.h"

OM_uint32
gss_acquire_cred(OM_uint32 *minor_status,
    const gss_name_t desired_name,
    OM_uint32 time_req,
    const gss_OID_set desired_mechs,
    gss_cred_usage_t cred_usage,
    gss_cred_id_t *output_cred_handle,
    gss_OID_set *actual_mechs,
    OM_uint32 *time_rec)
{
        OM_uint32 major_status;
        struct acquire_cred_res res;
        struct acquire_cred_args args;
        enum clnt_stat stat;
        gss_cred_id_t cred;
        int i;
        CLIENT *cl;

        *minor_status = 0;
        cl = kgss_gssd_client();
        if (cl == NULL)
                return (GSS_S_FAILURE);

        args.uid = curthread->td_ucred->cr_uid;
        if (desired_name)
                args.desired_name = desired_name->handle;
        else
                args.desired_name = 0;
        args.time_req = time_req;
        args.desired_mechs = desired_mechs;
        args.cred_usage = cred_usage;

        bzero(&res, sizeof(res));
        stat = gssd_acquire_cred_1(&args, &res, cl);
        CLNT_RELEASE(cl);
        if (stat != RPC_SUCCESS) {
                *minor_status = stat;
                return (GSS_S_FAILURE);
        }

        if (res.major_status != GSS_S_COMPLETE) {
                *minor_status = res.minor_status;
                return (res.major_status);
        }

        cred = malloc(sizeof(struct _gss_cred_id_t), M_GSSAPI, M_WAITOK);
        cred->handle = res.output_cred;
        *output_cred_handle = cred;
        if (actual_mechs) {
                major_status = gss_create_empty_oid_set(minor_status,
                    actual_mechs);
                if (major_status)
                        return (major_status);
                for (i = 0; i < res.actual_mechs->count; i++) {
                        major_status = gss_add_oid_set_member(minor_status,
                            &res.actual_mechs->elements[i], actual_mechs);
                        if (major_status)
                                return (major_status);
                }
        }
        if (time_rec)
                *time_rec = res.time_rec;

        xdr_free((xdrproc_t) xdr_acquire_cred_res, &res);

        return (GSS_S_COMPLETE);
}