1 /*
2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "krb5_locl.h"
35
36 RCSID("$Id: set_default_realm.c,v 1.14 2004/05/25 21:42:26 lha Exp $");
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 krb5_set_error_string (context, "malloc: out of memory");
50 return ENOMEM;
51 }
52 (*list)[0] = strdup (s);
53 if ((*list)[0] == NULL) {
54 free (*list);
55 krb5_set_error_string (context, "malloc: out of memory");
56 return ENOMEM;
57 }
58 (*list)[1] = NULL;
59 return 0;
60 }
61
62 /*
63 * Set the knowledge of the default realm(s) in `context'.
64 * If realm != NULL, that's the new default realm.
65 * Otherwise, the realm(s) are figured out from configuration or DNS.
66 */
67
68 krb5_error_code KRB5_LIB_FUNCTION
krb5_set_default_realm(krb5_context context,const char * realm)69 krb5_set_default_realm(krb5_context context,
70 const char *realm)
71 {
72 krb5_error_code ret = 0;
73 krb5_realm *realms = NULL;
74
75 if (realm == NULL) {
76 realms = krb5_config_get_strings (context, NULL,
77 "libdefaults",
78 "default_realm",
79 NULL);
80 if (realms == NULL)
81 ret = krb5_get_host_realm(context, NULL, &realms);
82 } else {
83 ret = string_to_list (context, realm, &realms);
84 }
85 if (ret)
86 return ret;
87 krb5_free_host_realm (context, context->default_realms);
88 context->default_realms = realms;
89 return 0;
90 }
91