1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33#include <sys/param.h>
34#include <sys/kernel.h>
35#include <sys/kobj.h>
36#include <sys/lock.h>
37#include <sys/malloc.h>
38#include <sys/mutex.h>
39
40#include <kgssapi/gssapi.h>
41#include <kgssapi/gssapi_impl.h>
42
43#include "gssd.h"
44
45OM_uint32
46gss_delete_sec_context(OM_uint32 *minor_status, gss_ctx_id_t *context_handle,
47	gss_buffer_t output_token)
48{
49	struct delete_sec_context_res res;
50	struct delete_sec_context_args args;
51	enum clnt_stat stat;
52	gss_ctx_id_t ctx;
53	CLIENT *cl;
54
55	*minor_status = 0;
56
57	if (!kgss_gssd_handle)
58		return (GSS_S_FAILURE);
59
60	if (*context_handle) {
61		ctx = *context_handle;
62
63		/*
64		 * If we are past the context establishment phase, let
65		 * the in-kernel code do the delete, otherwise
66		 * userland needs to deal with it.
67		 */
68		if (ctx->handle) {
69			args.ctx = ctx->handle;
70			cl = kgss_gssd_client();
71			if (cl == NULL)
72				return (GSS_S_FAILURE);
73
74			bzero(&res, sizeof(res));
75			stat = gssd_delete_sec_context_1(&args, &res, cl);
76			CLNT_RELEASE(cl);
77			if (stat != RPC_SUCCESS) {
78				*minor_status = stat;
79				return (GSS_S_FAILURE);
80			}
81
82			if (output_token)
83				kgss_copy_buffer(&res.output_token,
84				    output_token);
85			xdr_free((xdrproc_t) xdr_delete_sec_context_res, &res);
86
87			kgss_delete_context(ctx, NULL);
88		} else {
89			kgss_delete_context(ctx, output_token);
90		}
91		*context_handle = NULL;
92	} else {
93		if (output_token) {
94			output_token->length = 0;
95			output_token->value = NULL;
96		}
97	}
98
99	return (GSS_S_COMPLETE);
100}
101