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 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	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
65KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
66krb5_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