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