/*-
 * 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/cdefs.h>
__FBSDID("$FreeBSD$");

#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);
}