diff options
Diffstat (limited to 'crypto/heimdal/lib/krb5/krbhst.c')
| -rw-r--r-- | crypto/heimdal/lib/krb5/krbhst.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/krbhst.c b/crypto/heimdal/lib/krb5/krbhst.c new file mode 100644 index 0000000..8d5c4e4 --- /dev/null +++ b/crypto/heimdal/lib/krb5/krbhst.c @@ -0,0 +1,196 @@ +/* + * Copyright (c) 1997, 1998, 1999 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: krbhst.c,v 1.23 1999/12/11 23:14:25 assar Exp $"); + +/* + * assuming that `*res' contains `*count' strings, add a copy of `string'. + */ + +static int +add_string(char ***res, int *count, const char *string) +{ + char **tmp = realloc(*res, (*count + 1) * sizeof(**res)); + + if(tmp == NULL) + return ENOMEM; + *res = tmp; + if(string) { + tmp[*count] = strdup(string); + if(tmp[*count] == NULL) + return ENOMEM; + } else + tmp[*count] = NULL; + (*count)++; + return 0; +} + +static krb5_error_code +srv_find_realm(krb5_context context, char ***res, int *count, + const char *realm, const char *proto, const char *service) +{ + char domain[1024]; + char alt_domain[1024]; + krb5_error_code ret; + struct dns_reply *r; + struct resource_record *rr; + + snprintf(domain, sizeof(domain), "_%s._%s.%s.", service, proto, realm); + + r = dns_lookup(domain, "srv"); + if(r == NULL && context->srv_try_rfc2052) { + snprintf(alt_domain, sizeof(alt_domain), "%s.%s.%s.", + service, proto, realm); + r = dns_lookup(alt_domain, "srv"); + } + if(r == NULL && context->srv_try_txt) + r = dns_lookup(domain, "txt"); + if(r == NULL && context->srv_try_rfc2052 && context->srv_try_txt) + r = dns_lookup(alt_domain, "txt"); + if(r == NULL) + return 0; + + for(rr = r->head; rr; rr = rr->next){ + if(rr->type == T_SRV){ + char buf[1024]; + char **tmp; + + tmp = realloc(*res, (*count + 1) * sizeof(**res)); + if (tmp == NULL) + return ENOMEM; + *res = tmp; + snprintf (buf, sizeof(buf), + "%s/%s:%u", + proto, + rr->u.srv->target, + rr->u.srv->port); + ret = add_string(res, count, buf); + if(ret) + return ret; + }else if(rr->type == T_TXT) { + ret = add_string(res, count, rr->u.txt); + if(ret) + return ret; + } + } + dns_free_data(r); + return 0; +} + +/* + * lookup the servers for realm `realm', looking for the config string + * `conf_string' in krb5.conf or for `serv_string' in SRV records. + * return a malloc-ed list of servers in hostlist. + */ + +static krb5_error_code +get_krbhst (krb5_context context, + const krb5_realm *realm, + const char *conf_string, + const char *serv_string, + char ***hostlist) +{ + char **res, **r; + int count; + krb5_error_code ret; + + res = krb5_config_get_strings(context, NULL, + "realms", *realm, conf_string, NULL); + for(r = res, count = 0; r && *r; r++, count++); + + if(context->srv_lookup) { + char *s[] = { "udp", "tcp", "http" }, **q; + for(q = s; q < s + sizeof(s) / sizeof(s[0]); q++) { + ret = srv_find_realm(context, &res, &count, *realm, *q, + serv_string); + if(ret) { + krb5_config_free_strings(res); + return ret; + } + } + } + + if(count == 0) { + char buf[1024]; + snprintf(buf, sizeof(buf), "kerberos.%s", *realm); + ret = add_string(&res, &count, buf); + if(ret) { + krb5_config_free_strings(res); + return ret; + } + } + add_string(&res, &count, NULL); + *hostlist = res; + return 0; +} + +krb5_error_code +krb5_get_krb_admin_hst (krb5_context context, + const krb5_realm *realm, + char ***hostlist) +{ + return get_krbhst (context, realm, "admin_server", "kerberos-adm", + hostlist); +} + +krb5_error_code +krb5_get_krb_changepw_hst (krb5_context context, + const krb5_realm *realm, + char ***hostlist) +{ + return get_krbhst (context, realm, "admin_server", "kpasswd", + hostlist); +} + +krb5_error_code +krb5_get_krbhst (krb5_context context, + const krb5_realm *realm, + char ***hostlist) +{ + return get_krbhst (context, realm, "kdc", "kerberos", hostlist); +} + +krb5_error_code +krb5_free_krbhst (krb5_context context, + char **hostlist) +{ + char **p; + + for (p = hostlist; *p; ++p) + free (*p); + free (hostlist); + return 0; +} |
