1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /*
3 * Copyright (C) 2020 by Red Hat, Inc.
4 * All rights reserved.
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 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <stdio.h>
33 #include <string.h>
34 #include <assert.h>
35
36 #include "common.h"
37
38 /*
39 * Establish contexts (without and with GSS_C_DCE_STYLE) with the default
40 * initiator name, a specified principal name as target name, initiator
41 * bindings, and acceptor bindings. If any call is unsuccessful, display an
42 * error message. Output "yes" or "no" to indicate whether the contexts were
43 * reported as channel-bound on the acceptor. Exit with status 0 if all
44 * operations are successful, or 1 if not.
45 *
46 * Usage: ./t_bindings [-s] [-b] targetname icb acb
47 *
48 * An icb or abc value of "-" will not specify channel bindings. The -s flag
49 * uses the SPNEGO mechanism instead of the krb5 mecanism. The -b flag
50 * includes GSS_C_CHANNEL_BOUND in req_flags, which requests strict enforcement
51 * of channel bindings by the acceptor.
52 */
53
54 int
main(int argc,char * argv[])55 main(int argc, char *argv[])
56 {
57 OM_uint32 client_flags = 0;
58 OM_uint32 minor, flags1, flags2;
59 gss_name_t target_name;
60 gss_ctx_id_t ictx, actx;
61 struct gss_channel_bindings_struct icb_data = {0}, acb_data = {0};
62 gss_channel_bindings_t icb = GSS_C_NO_CHANNEL_BINDINGS;
63 gss_channel_bindings_t acb = GSS_C_NO_CHANNEL_BINDINGS;
64 gss_OID_desc *mech = GSS_C_NO_OID;
65
66 argv++;
67 argc--;
68
69 if (*argv != NULL && strcmp(*argv, "-s") == 0) {
70 mech = &mech_spnego;
71 argv++;
72 argc--;
73 }
74
75 if (*argv != NULL && strcmp(*argv, "-b") == 0) {
76 client_flags |= GSS_C_CHANNEL_BOUND_FLAG;
77 argv++;
78 argc--;
79 }
80
81 if (mech == GSS_C_NO_OID)
82 mech = &mech_krb5;
83
84 if (argc != 3) {
85 fprintf(stderr, "Usage: t_bindings [-s] [-b] targetname icb acb\n");
86 return 1;
87 }
88
89 target_name = import_name(argv[0]);
90
91 if (strcmp(argv[1], "-") != 0) {
92 icb_data.application_data.length = strlen(argv[1]);
93 icb_data.application_data.value = argv[1];
94 icb = &icb_data;
95 }
96
97 if (strcmp(argv[2], "-") != 0) {
98 acb_data.application_data.length = strlen(argv[2]);
99 acb_data.application_data.value = argv[2];
100 acb = &acb_data;
101 }
102
103 establish_contexts_ex(mech, GSS_C_NO_CREDENTIAL, GSS_C_NO_CREDENTIAL,
104 target_name, client_flags, &ictx, &actx, icb, acb,
105 &flags1, NULL, NULL, NULL);
106
107 /* Try again with GSS_C_DCE_STYLE */
108 (void)gss_delete_sec_context(&minor, &ictx, NULL);
109 (void)gss_delete_sec_context(&minor, &actx, NULL);
110
111 client_flags |= GSS_C_DCE_STYLE;
112 establish_contexts_ex(mech, GSS_C_NO_CREDENTIAL, GSS_C_NO_CREDENTIAL,
113 target_name, client_flags, &ictx, &actx, icb, acb,
114 &flags2, NULL, NULL, NULL);
115 assert((flags1 & GSS_C_CHANNEL_BOUND_FLAG) ==
116 (flags2 & GSS_C_CHANNEL_BOUND_FLAG));
117 printf("%s\n", (flags1 & GSS_C_CHANNEL_BOUND_FLAG) ? "yes" : "no");
118
119 (void)gss_delete_sec_context(&minor, &ictx, NULL);
120 (void)gss_delete_sec_context(&minor, &actx, NULL);
121 (void)gss_release_name(&minor, &target_name);
122
123 return 0;
124 }
125