1 /* $NetBSD: set_default_realm.c,v 1.2 2017/01/28 21:31:49 christos Exp $ */
2
3 /*
4 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
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 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "krb5_locl.h"
37
38 /*
39 * Convert the simple string `s' into a NULL-terminated and freshly allocated
40 * list in `list'. Return an error code.
41 */
42
43 static krb5_error_code
string_to_list(krb5_context context,const char * s,krb5_realm ** list)44 string_to_list (krb5_context context, const char *s, krb5_realm **list)
45 {
46
47 *list = malloc (2 * sizeof(**list));
48 if (*list == NULL)
49 return krb5_enomem(context);
50 (*list)[0] = strdup (s);
51 if ((*list)[0] == NULL) {
52 free (*list);
53 return krb5_enomem(context);
54 }
55 (*list)[1] = NULL;
56 return 0;
57 }
58
59 /*
60 * Set the knowledge of the default realm(s) in `context'.
61 * If realm != NULL, that's the new default realm.
62 * Otherwise, the realm(s) are figured out from configuration or DNS.
63 */
64
65 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_set_default_realm(krb5_context context,const char * realm)66 krb5_set_default_realm(krb5_context context,
67 const char *realm)
68 {
69 krb5_error_code ret = 0;
70 krb5_realm *realms = NULL;
71
72 if (realm == NULL) {
73 realms = krb5_config_get_strings (context, NULL,
74 "libdefaults",
75 "default_realm",
76 NULL);
77 if (realms == NULL)
78 ret = krb5_get_host_realm(context, NULL, &realms);
79 } else {
80 ret = string_to_list (context, realm, &realms);
81 }
82 if (ret)
83 return ret;
84 krb5_free_host_realm (context, context->default_realms);
85 context->default_realms = realms;
86 return 0;
87 }
88