crypto/external/bsd/heimdal/dist/lib/krb5/set_default_realm.c

   1 /*      $NetBSD: set_default_realm.c,v 1.1.1.1 2011/04/13 18:15:38 elric 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
  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_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
  70 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
  71 krb5_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 }