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/*
SSSD
IPA Identity Backend Module for views and overrides
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2014 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 "util/util.h"
#include "providers/ldap/sdap_async.h"
#include "providers/ipa/ipa_id.h"
struct ipa_get_ad_override_state {
struct tevent_context *ev;
struct sdap_id_ctx *sdap_id_ctx;
struct ipa_options *ipa_options;
const char *ipa_realm;
const char *ipa_view_name;
const char *obj_sid;
struct sdap_id_op *sdap_op;
int dp_error;
struct sysdb_attrs *override_attrs;
};
static void ipa_get_ad_override_connect_done(struct tevent_req *subreq);
static void ipa_get_ad_override_done(struct tevent_req *subreq);
struct tevent_req *ipa_get_ad_override_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct sdap_id_ctx *sdap_id_ctx,
struct ipa_options *ipa_options,
const char *ipa_realm,
const char *view_name,
const char *obj_sid)
{
int ret;
struct tevent_req *req;
struct tevent_req *subreq;
struct ipa_get_ad_override_state *state;
req = tevent_req_create(mem_ctx, &state, struct ipa_get_ad_override_state);
if (req == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "tevent_req_create failed.\n");
return NULL;
}
state->ev = ev;
state->sdap_id_ctx = sdap_id_ctx;
state->ipa_options = ipa_options;
state->ipa_realm = ipa_realm;
if (strcmp(view_name, SYSDB_DEFAULT_VIEW_NAME) == 0) {
state->ipa_view_name = IPA_DEFAULT_VIEW_NAME;
} else {
state->ipa_view_name = view_name;
}
state->obj_sid = obj_sid;
state->dp_error = -1;
state->override_attrs = NULL;
state->sdap_op = sdap_id_op_create(state,
state->sdap_id_ctx->conn->conn_cache);
if (state->sdap_op == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "sdap_id_op_create failed\n");
ret = ENOMEM;
goto done;
}
subreq = sdap_id_op_connect_send(state->sdap_op, state, &ret);
if (subreq == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "sdap_id_op_connect_send failed: %d(%s).\n",
ret, strerror(ret));
goto done;
}
tevent_req_set_callback(subreq, ipa_get_ad_override_connect_done, req);
return req;
done:
if (ret != EOK) {
state->dp_error = DP_ERR_FATAL;
tevent_req_error(req, ret);
} else {
state->dp_error = DP_ERR_OK;
tevent_req_done(req);
}
tevent_req_post(req, state->ev);
return req;
}
static void ipa_get_ad_override_connect_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
struct ipa_get_ad_override_state *state = tevent_req_data(req,
struct ipa_get_ad_override_state);
int ret;
char *basedn;
char *search_base;
char *filter;
struct ipa_options *ipa_opts = state->ipa_options;
ret = sdap_id_op_connect_recv(subreq, &state->dp_error);
talloc_zfree(subreq);
if (ret != EOK) {
if (state->dp_error == DP_ERR_OFFLINE) {
DEBUG(SSSDBG_MINOR_FAILURE,
"No IPA server is available, going offline\n");
} else {
DEBUG(SSSDBG_OP_FAILURE,
"Failed to connect to IPA server: [%d](%s)\n",
ret, strerror(ret));
}
goto fail;
}
ret = domain_to_basedn(state, state->ipa_realm, &basedn);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, "domain_to_basedn failed.\n");
goto fail;
}
search_base = talloc_asprintf(state, "cn=%s,%s", state->ipa_view_name,
ipa_opts->views_search_bases[0]->basedn);
if (search_base == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "talloc_asprintf failed.\n");
ret = ENOMEM;
goto fail;
}
filter = talloc_asprintf(state, "(&(objectClass=%s)(%s=:SID:%s))",
ipa_opts->override_map[IPA_OC_OVERRIDE].name,
ipa_opts->override_map[IPA_AT_OVERRIDE_ANCHOR_UUID].name,
state->obj_sid);
if (filter == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "talloc_asprintf failed.\n");
ret = ENOMEM;
goto fail;
}
DEBUG(SSSDBG_TRACE_ALL,
"Searching for overrides in view [%s] for object with SID [%s].\n",
state->ipa_view_name, state->obj_sid);
subreq = sdap_get_generic_send(state, state->ev, state->sdap_id_ctx->opts,
sdap_id_op_handle(state->sdap_op), search_base,
LDAP_SCOPE_SUBTREE,
filter, NULL, state->ipa_options->override_map,
IPA_OPTS_OVERRIDE,
dp_opt_get_int(state->sdap_id_ctx->opts->basic,
SDAP_ENUM_SEARCH_TIMEOUT),
false);
if (subreq == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "sdap_get_generic_send failed.\n");
ret = ENOMEM;
goto fail;
}
tevent_req_set_callback(subreq, ipa_get_ad_override_done, req);
return;
fail:
state->dp_error = DP_ERR_FATAL;
tevent_req_error(req, ret);
return;
}
static void ipa_get_ad_override_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
struct ipa_get_ad_override_state *state = tevent_req_data(req,
struct ipa_get_ad_override_state);
int ret;
size_t reply_count;
struct sysdb_attrs **reply;
ret = sdap_get_generic_recv(subreq, state, &reply_count, &reply);
talloc_zfree(subreq);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, "ipa_get_ad_override request failed.\n");
goto fail;
}
if (reply_count == 0) {
DEBUG(SSSDBG_TRACE_ALL, "No override found for SID [%s].\n",
state->obj_sid);
state->dp_error = DP_ERR_OK;
tevent_req_done(req);
return;
} else if (reply_count > 1) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Found [%zu] overrides for SID [%s], expected only 1.\n",
reply_count, state->obj_sid);
ret = EINVAL;
goto fail;
}
DEBUG(SSSDBG_TRACE_ALL, "Found override for object with SID [%s].\n",
state->obj_sid);
state->override_attrs = reply[0];
state->dp_error = DP_ERR_OK;
tevent_req_done(req);
return;
fail:
state->dp_error = DP_ERR_FATAL;
tevent_req_error(req, ret);
return;
}
errno_t ipa_get_ad_override_recv(struct tevent_req *req, int *dp_error_out,
TALLOC_CTX *mem_ctx,
struct sysdb_attrs **override_attrs)
{
struct ipa_get_ad_override_state *state = tevent_req_data(req,
struct ipa_get_ad_override_state);
if (dp_error_out != NULL) {
*dp_error_out = state->dp_error;
}
TEVENT_REQ_RETURN_ON_ERROR(req);
if (override_attrs != NULL) {
*override_attrs = talloc_steal(mem_ctx, state->override_attrs);
}
return EOK;
}
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