1/*	$NetBSD$	*/
2
3/*
4 * Copyright (c) 1997 - 2001 Kungliga Tekniska H��gskolan
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
43static krb5_error_code
44string_to_list (krb5_context context, const char *s, krb5_realm **list)
45{
46
47    *list = malloc (2 * sizeof(**list));
48    if (*list == NULL) {
49	krb5_set_error_message(context, ENOMEM,
50			       N_("malloc: out of memory", ""));
51	return ENOMEM;
52    }
53    (*list)[0] = strdup (s);
54    if ((*list)[0] == NULL) {
55	free (*list);
56	krb5_set_error_message(context, ENOMEM,
57			       N_("malloc: out of memory", ""));
58	return ENOMEM;
59    }
60    (*list)[1] = NULL;
61    return 0;
62}
63
64/*
65 * Set the knowledge of the default realm(s) in `context'.
66 * If realm != NULL, that's the new default realm.
67 * Otherwise, the realm(s) are figured out from configuration or DNS.
68 */
69
70KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
71krb5_set_default_realm(krb5_context context,
72		       const char *realm)
73{
74    krb5_error_code ret = 0;
75    krb5_realm *realms = NULL;
76
77    if (realm == NULL) {
78	realms = krb5_config_get_strings (context, NULL,
79					  "libdefaults",
80					  "default_realm",
81					  NULL);
82	if (realms == NULL)
83	    ret = krb5_get_host_realm(context, NULL, &realms);
84    } else {
85	ret = string_to_list (context, realm, &realms);
86    }
87    if (ret)
88	return ret;
89    krb5_free_host_realm (context, context->default_realms);
90    context->default_realms = realms;
91    return 0;
92}
93