1 /* 2 * Copyright (c) 1997, 1998, 1999 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 1.11 1999/12/02 17:05:12 joda 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 44 string_to_list (const char *s, krb5_realm **list) 45 { 46 47 *list = malloc (2 * sizeof(**list)); 48 if (*list == NULL) 49 return ENOMEM; 50 (*list)[0] = strdup (s); 51 if ((*list)[0] == NULL) { 52 free (*list); 53 return ENOMEM; 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 65 krb5_error_code 66 krb5_set_default_realm(krb5_context context, 67 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 (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