diff options
Diffstat (limited to 'crypto/heimdal/lib/krb5/get_host_realm.c')
| -rw-r--r-- | crypto/heimdal/lib/krb5/get_host_realm.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/crypto/heimdal/lib/krb5/get_host_realm.c b/crypto/heimdal/lib/krb5/get_host_realm.c deleted file mode 100644 index f2b4280f8b8f0..0000000000000 --- a/crypto/heimdal/lib/krb5/get_host_realm.c +++ /dev/null @@ -1,220 +0,0 @@ -/* - * 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" -#include <resolve.h> - -RCSID("$Id: get_host_realm.c,v 1.29 2002/08/28 13:36:57 nectar Exp $"); - -/* To automagically find the correct realm of a host (without - * [domain_realm] in krb5.conf) add a text record for your domain with - * the name of your realm, like this: - * - * _kerberos IN TXT "FOO.SE" - * - * The search is recursive, so you can add entries for specific - * hosts. To find the realm of host a.b.c, it first tries - * _kerberos.a.b.c, then _kerberos.b.c and so on. - * - * This method is described in draft-ietf-cat-krb-dns-locate-03.txt. - * - */ - -static int -copy_txt_to_realms (struct resource_record *head, - krb5_realm **realms) -{ - struct resource_record *rr; - int n, i; - - for(n = 0, rr = head; rr; rr = rr->next) - if (rr->type == T_TXT) - ++n; - - if (n == 0) - return -1; - - *realms = malloc ((n + 1) * sizeof(krb5_realm)); - if (*realms == NULL) - return -1; - - for (i = 0; i < n + 1; ++i) - (*realms)[i] = NULL; - - for (i = 0, rr = head; rr; rr = rr->next) { - if (rr->type == T_TXT) { - char *tmp; - - tmp = strdup(rr->u.txt); - if (tmp == NULL) { - for (i = 0; i < n; ++i) - free ((*realms)[i]); - free (*realms); - return -1; - } - (*realms)[i] = tmp; - ++i; - } - } - return 0; -} - -static int -dns_find_realm(krb5_context context, - const char *domain, - krb5_realm **realms) -{ - static char *default_labels[] = { "_kerberos", NULL }; - char dom[MAXHOSTNAMELEN]; - struct dns_reply *r; - char **labels; - int i, ret; - - labels = krb5_config_get_strings(context, NULL, "libdefaults", - "dns_lookup_realm_labels", NULL); - if(labels == NULL) - labels = default_labels; - if(*domain == '.') - domain++; - for (i = 0; labels[i] != NULL; i++) { - if(snprintf(dom, sizeof(dom), "%s.%s.", labels[i], domain) >= - sizeof(dom)) - return -1; - r = dns_lookup(dom, "TXT"); - if(r != NULL) { - ret = copy_txt_to_realms (r->head, realms); - dns_free_data(r); - if(ret == 0) - return 0; - } - } - return -1; -} - -/* - * Try to figure out what realms host in `domain' belong to from the - * configuration file. - */ - -static int -config_find_realm(krb5_context context, - const char *domain, - krb5_realm **realms) -{ - char **tmp = krb5_config_get_strings (context, NULL, - "domain_realm", - domain, - NULL); - - if (tmp == NULL) - return -1; - *realms = tmp; - return 0; -} - -/* - * This function assumes that `host' is a FQDN (and doesn't handle the - * special case of host == NULL either). - * Try to find mapping in the config file or DNS and it that fails, - * fall back to guessing - */ - -krb5_error_code -krb5_get_host_realm_int (krb5_context context, - const char *host, - krb5_boolean use_dns, - krb5_realm **realms) -{ - const char *p, *q; - krb5_boolean dns_locate_enable; - - dns_locate_enable = krb5_config_get_bool_default(context, NULL, TRUE, - "libdefaults", "dns_lookup_realm", NULL); - for (p = host; p != NULL; p = strchr (p + 1, '.')) { - if(config_find_realm(context, p, realms) == 0) { - if(strcasecmp(*realms[0], "dns_locate") == 0) { - if(use_dns) - for (q = host; q != NULL; q = strchr(q + 1, '.')) - if(dns_find_realm(context, q, realms) == 0) - return 0; - continue; - } else - return 0; - } - else if(use_dns && dns_locate_enable) { - if(dns_find_realm(context, p, realms) == 0) - return 0; - } - } - p = strchr(host, '.'); - if(p != NULL) { - p++; - *realms = malloc(2 * sizeof(krb5_realm)); - if (*realms == NULL) { - krb5_set_error_string(context, "malloc: out of memory"); - return ENOMEM; - } - - (*realms)[0] = strdup(p); - if((*realms)[0] == NULL) { - free(*realms); - krb5_set_error_string(context, "malloc: out of memory"); - return ENOMEM; - } - strupr((*realms)[0]); - (*realms)[1] = NULL; - return 0; - } - krb5_set_error_string(context, "unable to find realm of host %s", host); - return KRB5_ERR_HOST_REALM_UNKNOWN; -} - -/* - * Return the realm(s) of `host' as a NULL-terminated list in `realms'. - */ - -krb5_error_code -krb5_get_host_realm(krb5_context context, - const char *host, - krb5_realm **realms) -{ - char hostname[MAXHOSTNAMELEN]; - - if (host == NULL) { - if (gethostname (hostname, sizeof(hostname))) - return errno; - host = hostname; - } - - return krb5_get_host_realm_int (context, host, 1, realms); -} |