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/*
Unix SMB/Netbios implementation.
Version 3.0
ads (active directory) utility library
Copyright (C) Andrew Tridgell 2001
Copyright (C) Andrew Bartlett 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
static char *ads_build_dn(const char *realm)
{
char *p, *r;
int numdots = 0;
char *ret;
int len;
r = strdup(realm);
if (!r || !*r) return r;
for (p=r; *p; p++) {
if (*p == '.') numdots++;
}
len = (numdots+1)*4 + strlen(r) + 1;
ret = malloc(len);
strlcpy(ret,"dc=", len);
p=strtok(r,".");
strlcat(ret, p, len);
while ((p=strtok(NULL,"."))) {
strlcat(ret,",dc=", len);
strlcat(ret, p, len);
}
free(r);
return ret;
}
#ifdef HAVE_KRB5
/*
get the default relm from krb5.conf
*/
static char *get_default_realm(ADS_STRUCT *ads)
{
BOOL ret;
krb5_context context;
char *realm;
ret = krb5_init_context(&context);
if (ret) {
DEBUG(1,("krb5_init_context failed (%s)\n", error_message(ret)));
return NULL;
}
ret = krb5_get_default_realm(context, &realm);
if (ret) {
DEBUG(1,("krb5_get_default_realm failed (%s)\n", error_message(ret)));
krb5_free_context(context);
return NULL;
} else {
DEBUG(5,("krb5_get_default_realm got (%s)\n", realm));
}
krb5_free_context(context);
return realm;
}
#else
static char *get_default_realm(ADS_STRUCT *ads)
{
/* We can't do this if we don't have krb5,
but save linking nightmares */
DEBUG(5,("get_default_realm: not compiled with krb5.\n"));
return NULL;
}
#endif
#ifdef HAVE_LDAP
/*
find the ldap server from DNS
*/
static char *find_ldap_server(ADS_STRUCT *ads)
{
char *list = NULL;
if (!ads->realm) return NULL;
if (ldap_domain2hostlist(ads->realm, &list) == LDAP_SUCCESS) {
char *p;
p = strchr(list, ':');
if (p) *p = 0;
return list;
}
return NULL;
}
#else
static char *find_ldap_server(ADS_STRUCT *ads)
{
/* Without LDAP this doesn't make much sense */
return NULL;
}
#endif
#ifndef LDAP_PORT
#define LDAP_PORT 389
#endif
/*
initialise a ADS_STRUCT, ready for some ads_ ops
*/
ADS_STRUCT *ads_init(const char *realm,
const char *ldap_server,
const char *bind_path)
{
ADS_STRUCT *ads;
ads = (ADS_STRUCT *)smb_xmalloc(sizeof(*ads));
ZERO_STRUCTP(ads);
ads->realm = realm? strdup(realm) : NULL;
ads->ldap_server = ldap_server? strdup(ldap_server) : NULL;
ads->bind_path = bind_path? strdup(bind_path) : NULL;
ads->ldap_port = LDAP_PORT;
if (!ads->realm) {
ads->realm = strdup(lp_realm());
if (!ads->realm[0]) {
ads->realm = get_default_realm(ads);
}
if (!ads->realm) ads->realm = strdup("");
}
if (!ads->bind_path) {
ads->bind_path = ads_build_dn(ads->realm);
}
if (!ads->ldap_server) {
ads->ldap_server = strdup(lp_ads_server());
if (!ads->ldap_server[0]) {
ads->ldap_server = find_ldap_server(ads);
}
}
if (!ads->kdc_server) {
/* assume its the same as LDAP */
ads->kdc_server = ads->ldap_server? strdup(ads->ldap_server) : NULL;
}
return ads;
}
/*
free the memory used by the ADS structure initialized with 'ads_init(...)'
*/
void ads_destroy(ADS_STRUCT **ads)
{
if (ads && *ads) {
if ((*ads)->ld) ldap_unbind((*ads)->ld);
SAFE_FREE((*ads)->realm);
SAFE_FREE((*ads)->ldap_server);
SAFE_FREE((*ads)->kdc_server);
SAFE_FREE((*ads)->bind_path);
ZERO_STRUCTP(*ads);
SAFE_FREE(*ads);
}
}
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