1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
5 * Authors: Doug Rabson <dfr@rabson.org>
6 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/param.h>
31#include <sys/jail.h>
32#include <sys/kernel.h>
33#include <sys/kobj.h>
34#include <sys/lock.h>
35#include <sys/malloc.h>
36#include <sys/mutex.h>
37
38#include <kgssapi/gssapi.h>
39#include <kgssapi/gssapi_impl.h>
40
41#include "gssd.h"
42
43OM_uint32
44gss_delete_sec_context(OM_uint32 *minor_status, gss_ctx_id_t *context_handle,
45	gss_buffer_t output_token)
46{
47	struct delete_sec_context_res res;
48	struct delete_sec_context_args args;
49	enum clnt_stat stat;
50	gss_ctx_id_t ctx;
51	CLIENT *cl;
52
53	*minor_status = 0;
54
55	KGSS_CURVNET_SET_QUIET(KGSS_TD_TO_VNET(curthread));
56	if (!KGSS_VNET(kgss_gssd_handle)) {
57		KGSS_CURVNET_RESTORE();
58		return (GSS_S_FAILURE);
59	}
60	KGSS_CURVNET_RESTORE();
61
62	if (*context_handle) {
63		ctx = *context_handle;
64
65		/*
66		 * If we are past the context establishment phase, let
67		 * the in-kernel code do the delete, otherwise
68		 * userland needs to deal with it.
69		 */
70		if (ctx->handle) {
71			args.ctx = ctx->handle;
72			cl = kgss_gssd_client();
73			if (cl == NULL)
74				return (GSS_S_FAILURE);
75
76			bzero(&res, sizeof(res));
77			stat = gssd_delete_sec_context_1(&args, &res, cl);
78			CLNT_RELEASE(cl);
79			if (stat != RPC_SUCCESS) {
80				*minor_status = stat;
81				return (GSS_S_FAILURE);
82			}
83
84			if (output_token)
85				kgss_copy_buffer(&res.output_token,
86				    output_token);
87			xdr_free((xdrproc_t) xdr_delete_sec_context_res, &res);
88
89			kgss_delete_context(ctx, NULL);
90		} else {
91			kgss_delete_context(ctx, output_token);
92		}
93		*context_handle = NULL;
94	} else {
95		if (output_token) {
96			output_token->length = 0;
97			output_token->value = NULL;
98		}
99	}
100
101	return (GSS_S_COMPLETE);
102}
103