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/*
* Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb5_locl.h"
RCSID("$Id: set_default_realm.c,v 1.14 2004/05/25 21:42:26 lha Exp $");
/*
* Convert the simple string `s' into a NULL-terminated and freshly allocated
* list in `list'. Return an error code.
*/
static krb5_error_code
string_to_list (krb5_context context, const char *s, krb5_realm **list)
{
*list = malloc (2 * sizeof(**list));
if (*list == NULL) {
krb5_set_error_string (context, "malloc: out of memory");
return ENOMEM;
}
(*list)[0] = strdup (s);
if ((*list)[0] == NULL) {
free (*list);
krb5_set_error_string (context, "malloc: out of memory");
return ENOMEM;
}
(*list)[1] = NULL;
return 0;
}
/*
* Set the knowledge of the default realm(s) in `context'.
* If realm != NULL, that's the new default realm.
* Otherwise, the realm(s) are figured out from configuration or DNS.
*/
krb5_error_code KRB5_LIB_FUNCTION
krb5_set_default_realm(krb5_context context,
const char *realm)
{
krb5_error_code ret = 0;
krb5_realm *realms = NULL;
if (realm == NULL) {
realms = krb5_config_get_strings (context, NULL,
"libdefaults",
"default_realm",
NULL);
if (realms == NULL) {
char hostname[MAXHOSTNAMELEN];
if (gethostname (hostname, sizeof(hostname))) {
return errno;
}
if (strchr(hostname, '.') == NULL) {
/* There is no way we can get this mapping, as we can't do DNS */
return KRB5_CONFIG_NODEFREALM;
}
ret = krb5_get_host_realm(context, hostname,
&realms);
}
} else {
ret = string_to_list (context, realm, &realms);
}
if (ret)
return ret;
krb5_free_host_realm (context, context->default_realms);
context->default_realms = realms;
return 0;
}
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