74d32ebde5
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2971 ec53bebd-3082-4978-b11e-865c3cabbd6b
133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/*
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* Copyright (c) 1997 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Kungliga Tekniska
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* Högskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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#include "config_file.h"
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RCSID("$Id$");
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static int
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exact_match (const char *s, const char *pattern)
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{
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return strcasecmp (s, pattern) == 0;
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}
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static int
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domain_match (const char *s, const char *pattern)
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{
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const char *dot = strchr (s, '.');
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return dot && strcasecmp (dot, pattern) == 0;
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}
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krb5_error_code
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krb5_get_host_realm(krb5_context context,
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const char *host,
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krb5_realm **realms)
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{
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krb5_error_code ret;
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char hostname[MAXHOSTNAMELEN];
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char *res = NULL;
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const char *partial = NULL;
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const krb5_config_binding *l;
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struct in_addr addr;
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struct hostent *hostent;
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if (host == NULL) {
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if (gethostname (hostname, sizeof(hostname)))
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return errno;
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host = hostname;
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}
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addr.s_addr = inet_addr(host);
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hostent = gethostbyname (host);
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if (hostent == NULL && addr.s_addr != INADDR_NONE)
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hostent = gethostbyaddr ((const char *)&addr, sizeof(addr), AF_INET);
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if (hostent != NULL)
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host = hostent->h_name;
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*realms = malloc(2 * sizeof(krb5_realm));
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if (*realms == NULL)
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return ENOMEM;
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(*realms)[0] = NULL;
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(*realms)[1] = NULL;
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for(l = krb5_config_get_list (context->cf,
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"domain_realm",
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NULL);
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l;
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l = l->next) {
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if (l->type != STRING)
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continue;
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if (exact_match (host, l->name)) {
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res = l->u.string;
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break;
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} else if (domain_match (host, l->name)) {
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res = l->u.string;
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}
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}
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if (res) {
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(*realms)[0] = strdup(res);
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if ((*realms)[0] == NULL) {
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free (*realms);
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return ENOMEM;
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}
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} else {
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const char *dot = strchr (host, '.');
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if (dot != NULL) {
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(*realms)[0] = strdup (dot + 1);
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if ((*realms)[0] == NULL) {
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free (*realms);
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return ENOMEM;
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}
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strupr ((*realms)[0]);
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} else {
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ret = krb5_get_default_realm (context, *realms);
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if (ret) {
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free (*realms);
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*realms = NULL;
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return KRB5_ERR_HOST_REALM_UNKNOWN;
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}
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}
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}
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return 0;
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}
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