1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* tests/forward.c - test harness for getting forwarded creds */
3 /*
4 * Copyright (C) 2016 by the Massachusetts Institute of Technology.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
24 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
30 * OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /* This test program overwrites the default credential cache with a forwarded
34 * TGT obtained using the TGT presently in the cache. */
35
36 #include "k5-int.h"
37
38 static krb5_context ctx;
39
40 static void
check(krb5_error_code code)41 check(krb5_error_code code)
42 {
43 const char *errmsg;
44
45 if (code) {
46 errmsg = krb5_get_error_message(ctx, code);
47 fprintf(stderr, "%s\n", errmsg);
48 krb5_free_error_message(ctx, errmsg);
49 exit(1);
50 }
51 }
52
53 int
main()54 main()
55 {
56 krb5_ccache cc;
57 krb5_creds mcred, tgt, *fcred;
58 krb5_principal client, tgtprinc;
59 krb5_flags options;
60
61 /* Open the default ccache and get the client and TGT principal names. */
62 check(krb5_init_context(&ctx));
63 check(krb5_cc_default(ctx, &cc));
64 check(krb5_cc_get_principal(ctx, cc, &client));
65 check(krb5_build_principal_ext(ctx, &tgtprinc, client->realm.length,
66 client->realm.data, KRB5_TGS_NAME_SIZE,
67 KRB5_TGS_NAME, client->realm.length,
68 client->realm.data, 0));
69
70 /* Fetch the TGT credential. */
71 memset(&mcred, 0, sizeof(mcred));
72 mcred.client = client;
73 mcred.server = tgtprinc;
74 check(krb5_cc_retrieve_cred(ctx, cc, 0, &mcred, &tgt));
75
76 /* Get a forwarded TGT. */
77 mcred.times = tgt.times;
78 mcred.times.starttime = 0;
79 options = (tgt.ticket_flags & KDC_TKT_COMMON_MASK) | KDC_OPT_FORWARDED;
80 check(krb5_get_cred_via_tkt(ctx, &tgt, options, NULL, &mcred, &fcred));
81
82 /* Reinitialize the default ccache with the forwarded TGT. */
83 check(krb5_cc_initialize(ctx, cc, client));
84 check(krb5_cc_store_cred(ctx, cc, fcred));
85
86 krb5_free_creds(ctx, fcred);
87 krb5_free_cred_contents(ctx, &tgt);
88 krb5_free_principal(ctx, tgtprinc);
89 krb5_free_principal(ctx, client);
90 krb5_cc_close(ctx, cc);
91 krb5_free_context(ctx);
92 return 0;
93 }
94