ad_init.c revision a8356a0c98ee44e7256bb1c7767159c70e1fc218
/*
SSSD
Authors:
Stephen Gallagher <sgallagh@redhat.com>
Copyright (C) 2012 Red Hat
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sasl/sasl.h>
#include "util/util.h"
#include "providers/ad/ad_common.h"
#include "providers/ad/ad_access.h"
#include "providers/ldap/ldap_common.h"
#include "providers/ldap/sdap_access.h"
#include "providers/ldap/sdap_idmap.h"
#include "providers/krb5/krb5_auth.h"
#include "providers/krb5/krb5_init_shared.h"
#include "providers/ad/ad_id.h"
#include "providers/ad/ad_srv.h"
#include "providers/dp_dyndns.h"
#include "providers/ad/ad_subdomains.h"
#include "providers/ad/ad_domain_info.h"
struct ad_options *ad_options = NULL;
static void
ad_shutdown(struct be_req *req);
struct bet_ops ad_id_ops = {
.handler = ad_account_info_handler,
.finalize = ad_shutdown,
.check_online = ad_check_online
};
struct bet_ops ad_auth_ops = {
.handler = krb5_pam_handler,
.finalize = NULL
};
struct bet_ops ad_chpass_ops = {
.handler = krb5_pam_handler,
.finalize = NULL
};
struct bet_ops ad_access_ops = {
.handler = ad_access_handler,
.finalize = NULL
};
#define AD_COMPAT_ON "1"
static int ad_sasl_getopt(void *context, const char *plugin_name,
const char *option,
const char **result, unsigned *len)
{
if (!plugin_name || !result) {
return SASL_FAIL;
}
if (strcmp(plugin_name, "GSSAPI") != 0) {
return SASL_FAIL;
}
if (strcmp(option, "ad_compat") != 0) {
return SASL_FAIL;
}
*result = AD_COMPAT_ON;
if (len) {
*len = 2;
}
return SASL_OK;
}
typedef int (*sss_sasl_gen_cb_fn)(void);
static const sasl_callback_t ad_sasl_callbacks[] = {
{ SASL_CB_GETOPT, (sss_sasl_gen_cb_fn)ad_sasl_getopt, NULL },
{ SASL_CB_LIST_END, NULL, NULL }
};
/* This is quite a hack, we *try* to fool openldap libraries by initializing
* sasl first so we can pass in the SASL_CB_GETOPT callback we need to set some
* options. Should be removed as soon as openldap exposes a way to do that */
static void ad_sasl_initialize(void)
{
/* NOTE: this may fail if soe other library in the system happens to
* initialize and use openldap libraries or directly the cyrus-sasl
* library as this initialization function can be called only once per
* process */
(void)sasl_client_init(ad_sasl_callbacks);
}
static errno_t
common_ad_init(struct be_ctx *bectx)
{
errno_t ret;
char *ad_servers = NULL;
char *ad_backup_servers = NULL;
char *ad_realm;
ad_sasl_initialize();
/* Get AD-specific options */
ret = ad_get_common_options(bectx, bectx->cdb,
bectx->conf_path,
bectx->domain,
&ad_options);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Could not parse common options: [%s]\n",
strerror(ret));
goto done;
}
ad_servers = dp_opt_get_string(ad_options->basic, AD_SERVER);
ad_backup_servers = dp_opt_get_string(ad_options->basic, AD_BACKUP_SERVER);
ad_realm = dp_opt_get_string(ad_options->basic, AD_KRB5_REALM);
/* Set up the failover service */
ret = ad_failover_init(ad_options, bectx, ad_servers, ad_backup_servers, ad_realm,
AD_SERVICE_NAME, AD_GC_SERVICE_NAME,
dp_opt_get_string(ad_options->basic, AD_DOMAIN),
&ad_options->service);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Failed to init AD failover service: [%s]\n",
strerror(ret));
goto done;
}
ret = EOK;
done:
return ret;
}
int
sssm_ad_id_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_data)
{
errno_t ret;
struct ad_id_ctx *ad_ctx;
const char *hostname;
const char *ad_domain;
struct ad_srv_plugin_ctx *srv_ctx;
if (!ad_options) {
ret = common_ad_init(bectx);
if (ret != EOK) {
return ret;
}
}
if (ad_options->id_ctx) {
/* already initialized */
*ops = &ad_id_ops;
*pvt_data = ad_options->id_ctx;
return EOK;
}
ad_ctx = ad_id_ctx_init(ad_options, bectx);
if (ad_ctx == NULL) {
return ENOMEM;
}
ad_options->id_ctx = ad_ctx;
ret = ad_dyndns_init(ad_ctx->sdap_id_ctx->be, ad_options);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
"Failure setting up automatic DNS update\n");
/* Continue without DNS updates */
}
ret = sdap_setup_child();
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"setup_child failed [%d][%s].\n",
ret, strerror(ret));
goto done;
}
/* Set up various SDAP options */
ret = ad_get_id_options(ad_options, bectx->cdb,
bectx->conf_path,
&ad_ctx->sdap_id_ctx->opts);
if (ret != EOK) {
goto done;
}
ret = sdap_id_setup_tasks(bectx,
ad_ctx->sdap_id_ctx,
ad_ctx->sdap_id_ctx->opts->sdom,
ad_enumeration_send,
ad_enumeration_recv,
ad_ctx);
if (ret != EOK) {
goto done;
}
ad_ctx->sdap_id_ctx->opts->sdom->pvt = ad_ctx;
/* Set up the ID mapping object */
ret = sdap_idmap_init(ad_ctx->sdap_id_ctx, ad_ctx->sdap_id_ctx,
&ad_ctx->sdap_id_ctx->opts->idmap_ctx);
if (ret != EOK) goto done;
ret = setup_tls_config(ad_ctx->sdap_id_ctx->opts->basic);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE,
"setup_tls_config failed [%s]\n", strerror(ret));
goto done;
}
/* setup SRV lookup plugin */
hostname = dp_opt_get_string(ad_options->basic, AD_HOSTNAME);
if (dp_opt_get_bool(ad_options->basic, AD_ENABLE_DNS_SITES)) {
/* use AD plugin */
ad_domain = dp_opt_get_string(ad_options->basic, AD_DOMAIN);
srv_ctx = ad_srv_plugin_ctx_init(bectx, bectx->be_res,
default_host_dbs, ad_options->id,
hostname, ad_domain);
if (srv_ctx == NULL) {
DEBUG(SSSDBG_FATAL_FAILURE, "Out of memory?\n");
ret = ENOMEM;
goto done;
}
be_fo_set_srv_lookup_plugin(bectx, ad_srv_plugin_send,
ad_srv_plugin_recv, srv_ctx, "AD");
} else {
/* fall back to standard plugin */
ret = be_fo_set_dns_srv_lookup_plugin(bectx, hostname);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to set SRV lookup plugin "
"[%d]: %s\n", ret, strerror(ret));
goto done;
}
}
/* setup periodical refresh of expired records */
ret = be_refresh_add_cb(bectx->refresh_ctx, BE_REFRESH_TYPE_NETGROUPS,
sdap_refresh_netgroups_send,
sdap_refresh_netgroups_recv,
ad_ctx->sdap_id_ctx);
if (ret != EOK && ret != EEXIST) {
DEBUG(SSSDBG_MINOR_FAILURE, "Periodical refresh of netgroups "
"will not work [%d]: %s\n", ret, strerror(ret));
}
*ops = &ad_id_ops;
*pvt_data = ad_ctx;
ret = EOK;
done:
if (ret != EOK) {
talloc_zfree(ad_options->id_ctx);
}
return ret;
}
int
sssm_ad_auth_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_data)
{
errno_t ret;
struct krb5_ctx *krb5_auth_ctx = NULL;
if (!ad_options) {
ret = common_ad_init(bectx);
if (ret != EOK) {
return ret;
}
}
if (ad_options->auth_ctx) {
/* Already initialized */
*ops = &ad_auth_ops;
*pvt_data = ad_options->auth_ctx;
return EOK;
}
krb5_auth_ctx = talloc_zero(NULL, struct krb5_ctx);
if (!krb5_auth_ctx) {
ret = ENOMEM;
goto done;
}
krb5_auth_ctx->config_type = K5C_GENERIC;
krb5_auth_ctx->service = ad_options->service->krb5_service;
ret = ad_get_auth_options(krb5_auth_ctx, ad_options, bectx,
&krb5_auth_ctx->opts);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Could not determine Kerberos options\n");
goto done;
}
ret = krb5_child_init(krb5_auth_ctx, bectx);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Could not initialize krb5_child settings: [%s]\n",
strerror(ret));
goto done;
}
ad_options->auth_ctx = talloc_steal(ad_options, krb5_auth_ctx);
*ops = &ad_auth_ops;
*pvt_data = ad_options->auth_ctx;
done:
if (ret != EOK) {
talloc_free(krb5_auth_ctx);
}
return ret;
}
int
sssm_ad_chpass_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_data)
{
errno_t ret;
if (!ad_options) {
ret = common_ad_init(bectx);
if (ret != EOK) {
return ret;
}
}
if (ad_options->auth_ctx) {
/* Already initialized */
*ops = &ad_chpass_ops;
*pvt_data = ad_options->auth_ctx;
return EOK;
}
ret = sssm_ad_auth_init(bectx, ops, pvt_data);
*ops = &ad_chpass_ops;
ad_options->auth_ctx = *pvt_data;
return ret;
}
/* GPO parsing of PAM service names to Windows Logon Rights*/
errno_t ad_gpo_parse_map_options(struct ad_access_ctx *access_ctx);
int
sssm_ad_access_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_data)
{
errno_t ret;
struct ad_access_ctx *access_ctx;
struct ad_id_ctx *ad_id_ctx;
const char *filter;
const char *gpo_access_control_mode;
int gpo_cache_timeout;
access_ctx = talloc_zero(bectx, struct ad_access_ctx);
if (!access_ctx) return ENOMEM;
ret = sssm_ad_id_init(bectx, ops, (void **)&ad_id_ctx);
if (ret != EOK) {
goto fail;
}
access_ctx->ad_id_ctx = ad_id_ctx;
ret = dp_copy_options(access_ctx, ad_options->basic, AD_OPTS_BASIC,
&access_ctx->ad_options);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Could not initialize access provider options: [%s]\n",
strerror(ret));
goto fail;
}
/* Set up an sdap_access_ctx for checking expired/locked accounts */
access_ctx->sdap_access_ctx =
talloc_zero(access_ctx, struct sdap_access_ctx);
if (!access_ctx->sdap_access_ctx) {
ret = ENOMEM;
goto fail;
}
access_ctx->sdap_access_ctx->id_ctx = ad_id_ctx->sdap_id_ctx;
/* If ad_access_filter is set, the value of ldap_acess_order is
* expire, filter, otherwise only expire
*/
access_ctx->sdap_access_ctx->access_rule[0] = LDAP_ACCESS_EXPIRE;
filter = dp_opt_get_cstring(access_ctx->ad_options, AD_ACCESS_FILTER);
if (filter != NULL) {
/* The processing of the extended filter is performed during the access
* check itself
*/
access_ctx->sdap_access_ctx->filter = talloc_strdup(
access_ctx->sdap_access_ctx,
filter);
if (access_ctx->sdap_access_ctx->filter == NULL) {
ret = ENOMEM;
goto fail;
}
access_ctx->sdap_access_ctx->access_rule[1] = LDAP_ACCESS_FILTER;
access_ctx->sdap_access_ctx->access_rule[2] = LDAP_ACCESS_EMPTY;
} else {
access_ctx->sdap_access_ctx->access_rule[1] = LDAP_ACCESS_EMPTY;
}
/* GPO access control mode */
gpo_access_control_mode =
dp_opt_get_string(access_ctx->ad_options, AD_GPO_ACCESS_CONTROL);
if (strcasecmp(gpo_access_control_mode, "disabled") == 0) {
access_ctx->gpo_access_control_mode = GPO_ACCESS_CONTROL_DISABLED;
} else if (strcasecmp(gpo_access_control_mode, "permissive") == 0) {
access_ctx->gpo_access_control_mode = GPO_ACCESS_CONTROL_PERMISSIVE;
} else if (strcasecmp(gpo_access_control_mode, "enforcing") == 0) {
access_ctx->gpo_access_control_mode = GPO_ACCESS_CONTROL_ENFORCING;
} else {
DEBUG(SSSDBG_FATAL_FAILURE,
"Unrecognized GPO access control mode: %s\n",
gpo_access_control_mode);
ret = EINVAL;
goto fail;
}
/* GPO cache timeout */
gpo_cache_timeout =
dp_opt_get_int(access_ctx->ad_options, AD_GPO_CACHE_TIMEOUT);
access_ctx->gpo_cache_timeout = gpo_cache_timeout;
/* GPO logon maps */
ret = sss_hash_create(access_ctx, 10, &access_ctx->gpo_map_options_table);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Could not create gpo_map_options hash table: [%s]",
strerror(ret));
goto fail;
}
ret = ad_gpo_parse_map_options(access_ctx);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Could not parse gpo_map_options (invalid config): [%s]",
strerror(ret));
goto fail;
}
*ops = &ad_access_ops;
*pvt_data = access_ctx;
return EOK;
fail:
talloc_free(access_ctx);
return ret;
}
static void
ad_shutdown(struct be_req *req)
{
/* TODO: Clean up any internal data */
sdap_handler_done(req, DP_ERR_OK, EOK, NULL);
}
int sssm_ad_subdomains_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_data)
{
int ret;
struct ad_id_ctx *id_ctx;
const char *ad_domain;
ret = sssm_ad_id_init(bectx, ops, (void **) &id_ctx);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "sssm_ad_id_init failed.\n");
return ret;
}
if (ad_options == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Global AD options not available.\n");
return EINVAL;
}
ad_domain = dp_opt_get_string(ad_options->basic, AD_DOMAIN);
ret = ad_subdom_init(bectx, id_ctx, ad_domain, ops, pvt_data);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "ad_subdom_init failed.\n");
return ret;
}
return EOK;
}
int sssm_ad_sudo_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_data)
{
#ifdef BUILD_SUDO
struct ad_id_ctx *id_ctx;
int ret;
DEBUG(SSSDBG_TRACE_INTERNAL, "Initializing AD sudo handler\n");
ret = sssm_ad_id_init(bectx, ops, (void **) &id_ctx);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "sssm_ad_id_init failed.\n");
return ret;
}
return ad_sudo_init(bectx, id_ctx, ops, pvt_data);
#else
DEBUG(SSSDBG_MINOR_FAILURE, "Sudo init handler called but SSSD is "
"built without sudo support, ignoring\n");
return EOK;
#endif
}