1/*
2 * Copyright (c) 1997 - 2001, 2004 Kungliga Tekniska Högskolan
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
36krb5_error_code
37_krb5_array_to_realms(krb5_context context, heim_array_t array, krb5_realm **realms)
38{
39    size_t n, len;
40
41    len = heim_array_get_length(array);
42
43    *realms = calloc(len + 1, sizeof((*realms)[0]));
44    for (n = 0; n < len; n++) {
45	heim_string_t s = heim_array_copy_value(array, n);
46	if (s) {
47	    (*realms)[n] = heim_string_copy_utf8(s);
48	    heim_release(s);
49	}
50	if ((*realms)[n] == NULL) {
51	    krb5_free_host_realm(context, *realms);
52	    krb5_set_error_message(context, ENOMEM,
53				   N_("malloc: out of memory", ""));
54	    *realms = NULL;
55	    return ENOMEM;
56	}
57    }
58    (*realms)[n] = NULL;
59
60    return 0;
61}
62
63/*
64 * Get the list of default realms and make sure there is at least
65 * one realm configured.
66 */
67
68static krb5_error_code
69get_default_realms(krb5_context context)
70{
71    if (context->default_realms == NULL ||
72	heim_array_get_length(context->default_realms) == 0)
73    {
74	krb5_error_code ret = krb5_set_default_realm(context, NULL);
75	if (ret)
76	    return KRB5_CONFIG_NODEFREALM;
77    }
78
79    if (context->default_realms == NULL ||
80	heim_array_get_length(context->default_realms) == 0)
81    {
82	krb5_set_error_message(context, KRB5_CONFIG_NODEFREALM,
83			       N_("No default realm found", ""));
84	return KRB5_CONFIG_NODEFREALM;
85    }
86
87    return 0;
88}
89
90/*
91 * Return a NULL-terminated list of default realms in `realms'.
92 * Free this memory with krb5_free_host_realm.
93 */
94
95KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
96krb5_get_default_realms (krb5_context context,
97			 krb5_realm **realms)
98{
99    krb5_error_code ret;
100
101    ret = get_default_realms(context);
102    if (ret)
103	return ret;
104
105    return _krb5_array_to_realms(context, context->default_realms, realms);
106}
107
108/*
109 * Return the first default realm.  For compatibility.
110 */
111
112KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
113krb5_get_default_realm(krb5_context context,
114		       krb5_realm *realm)
115{
116    krb5_error_code ret;
117    heim_string_t s;
118
119    ret = get_default_realms(context);
120    if (ret)
121	return ret;
122
123    s = heim_array_copy_value(context->default_realms, 0);
124    if (s) {
125	*realm = heim_string_copy_utf8(s);
126	heim_release(s);
127    }
128    if (s == NULL || *realm == NULL) {
129	krb5_set_error_message(context, ENOMEM,
130			       N_("malloc: out of memory", ""));
131	return ENOMEM;
132    }
133
134    return 0;
135}
136