ipa_idmap.c revision db18dda869bc6c52a41797b2066cf121cf10f49c
/*
SSSD
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2013 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_idmap.h"
#include "providers/ipa/ipa_common.h"
#include "util/util_sss_idmap.h"
static errno_t ipa_idmap_check_posix_child(struct sdap_idmap_ctx *idmap_ctx,
const char *dom_name,
const char *dom_sid_str,
size_t range_count,
struct range_info **range_list)
{
bool has_algorithmic_mapping;
enum idmap_error_code err;
struct sss_domain_info *dom;
struct sss_domain_info *forest_root;
size_t c;
struct sss_idmap_range range;
struct range_info *r;
char *range_id;
TALLOC_CTX *tmp_ctx;
bool found = false;
int ret;
err = sss_idmap_domain_has_algorithmic_mapping(idmap_ctx->map, dom_sid_str,
&has_algorithmic_mapping);
if (err == IDMAP_SUCCESS) {
DEBUG(SSSDBG_TRACE_ALL,
"Idmap of domain [%s] already known, nothing to do.\n",
dom_sid_str);
return EOK;
} else {
err = sss_idmap_domain_by_name_has_algorithmic_mapping(idmap_ctx->map,
dom_name,
&has_algorithmic_mapping);
if (err == IDMAP_SUCCESS) {
DEBUG(SSSDBG_TRACE_ALL,
"Idmap of domain [%s] already known, nothing to do.\n",
dom_sid_str);
return EOK;
}
}
DEBUG(SSSDBG_TRACE_ALL, "Trying to add idmap for domain [%s].\n",
dom_sid_str);
if (err != IDMAP_SID_UNKNOWN && err != IDMAP_NAME_UNKNOWN) {
DEBUG(SSSDBG_OP_FAILURE,
"sss_idmap_domain_has_algorithmic_mapping failed.\n");
return EINVAL;
}
dom = find_domain_by_sid(idmap_ctx->id_ctx->be->domain, dom_sid_str);
if (dom == NULL) {
DEBUG(SSSDBG_OP_FAILURE,
"find_domain_by_sid failed with SID [%s].\n", dom_sid_str);
return EINVAL;
}
if (dom->forest == NULL) {
DEBUG(SSSDBG_MINOR_FAILURE, "No forest available for domain [%s].\n",
dom_sid_str);
return EINVAL;
}
forest_root = find_domain_by_name(idmap_ctx->id_ctx->be->domain,
dom->forest, true);
if (forest_root == NULL) {
DEBUG(SSSDBG_OP_FAILURE,
"find_domain_by_name failed to find forest root [%s].\n",
dom->forest);
return ENOENT;
}
if (forest_root->domain_id == NULL) {
DEBUG(SSSDBG_MINOR_FAILURE, "Forest root [%s] does not have a SID.\n",
dom->forest);
return EINVAL;
}
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "talloc_new failed.\n");
return ENOMEM;
}
for (c = 0; c < range_count; c++) {
r = range_list[c];
if (r->trusted_dom_sid != NULL
&& strcmp(r->trusted_dom_sid, forest_root->domain_id) == 0) {
if (r->range_type == NULL
|| strcmp(r->range_type, IPA_RANGE_AD_TRUST_POSIX) != 0) {
DEBUG(SSSDBG_MINOR_FAILURE,
"Forest root does not have range type [%s].\n",
IPA_RANGE_AD_TRUST_POSIX);
ret = EINVAL;
goto done;
}
range.min = r->base_id;
range.max = r->base_id + r->id_range_size -1;
range_id = talloc_asprintf(tmp_ctx, "%s-%s", dom_sid_str, r->name);
if (range_id == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "talloc_asprintf failed.\n");
ret = ENOMEM;
goto done;
}
err = sss_idmap_add_domain_ex(idmap_ctx->map, dom_name, dom_sid_str,
&range, range_id, 0, true);
if (err != IDMAP_SUCCESS && err != IDMAP_COLLISION) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Could not add range [%s] to ID map\n", range_id);
ret = EIO;
goto done;
}
found = true;
}
}
if (!found) {
DEBUG(SSSDBG_MINOR_FAILURE, "No idrange found for forest root [%s].\n",
forest_root->domain_id);
ret = ENOENT;
goto done;
}
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
errno_t get_idmap_data_from_range(struct range_info *r, char *domain_name,
char **_name, char **_sid, uint32_t *_rid,
struct sss_idmap_range *_range,
bool *_external_mapping)
{
if (r->range_type == NULL) {
/* Older IPA servers might not have the range_type attribute, but
* only support local ranges and trusts with algorithmic mapping. */
if (r->trusted_dom_sid == NULL && r->secondary_base_rid != 0) {
/* local IPA domain */
*_rid = 0;
*_external_mapping = true;
*_name = domain_name;
*_sid = NULL;
} else if (r->trusted_dom_sid != NULL
&& r->secondary_base_rid == 0) {
/* trusted domain */
*_rid = r->base_rid;
*_external_mapping = false;
*_name = r->trusted_dom_sid;
*_sid = r->trusted_dom_sid;
} else {
DEBUG(SSSDBG_MINOR_FAILURE, "Cannot determine range type, " \
"for id range [%s].\n",
r->name);
return EINVAL;
}
} else {
if (strcmp(r->range_type, IPA_RANGE_LOCAL) == 0) {
*_rid = 0;
*_external_mapping = true;
*_name = domain_name;
*_sid = NULL;
} else if (strcmp(r->range_type, IPA_RANGE_AD_TRUST_POSIX) == 0) {
*_rid = 0;
*_external_mapping = true;
*_name = r->trusted_dom_sid;
*_sid = r->trusted_dom_sid;
} else if (strcmp(r->range_type, IPA_RANGE_AD_TRUST) == 0) {
*_rid = r->base_rid;
*_external_mapping = false;
*_name = r->trusted_dom_sid;
*_sid = r->trusted_dom_sid;
} else {
DEBUG(SSSDBG_MINOR_FAILURE, "Range type [%s] of id range " \
"[%s] not supported.\n", \
r->range_type, r->name);
return EINVAL;
}
}
_range->min = r->base_id;
_range->max = r->base_id + r->id_range_size -1;
return EOK;
}
errno_t ipa_idmap_get_ranges_from_sysdb(struct sdap_idmap_ctx *idmap_ctx,
const char *dom_name,
const char *dom_sid_str,
bool allow_collisions)
{
int ret;
size_t range_count;
struct range_info **range_list;
TALLOC_CTX *tmp_ctx;
size_t c;
enum idmap_error_code err;
struct sss_idmap_range range;
uint32_t rid;
bool external_mapping;
char *name;
char *sid;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "talloc_new failed.\n");
return ENOMEM;
}
ret = sysdb_get_ranges(tmp_ctx, idmap_ctx->id_ctx->be->domain->sysdb,
&range_count, &range_list);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, "sysdb_get_ranges failed.\n");
goto done;
}
for (c = 0; c < range_count; c++) {
ret = get_idmap_data_from_range(range_list[c],
idmap_ctx->id_ctx->be->domain->name,
&name, &sid, &rid, &range,
&external_mapping);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, "get_idmap_data_from_range failed for " \
"id range [%s], skipping.\n",
range_list[c]->name);
continue;
}
err = sss_idmap_add_domain_ex(idmap_ctx->map, name, sid, &range,
range_list[c]->name, rid,
external_mapping);
if (err != IDMAP_SUCCESS) {
if (!allow_collisions || err != IDMAP_COLLISION) {
DEBUG(SSSDBG_CRIT_FAILURE, "Could not add range [%s] to ID map\n",
range_list[c]->name);
ret = EIO;
goto done;
}
}
}
if (dom_name != NULL || dom_sid_str != NULL) {
ret = ipa_idmap_check_posix_child(idmap_ctx, dom_name, dom_sid_str,
range_count, range_list);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, "ipa_idmap_check_posix_child failed.\n");
goto done;
}
}
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
errno_t ipa_idmap_find_new_domain(struct sdap_idmap_ctx *idmap_ctx,
const char *dom_name,
const char *dom_sid_str)
{
return ipa_idmap_get_ranges_from_sysdb(idmap_ctx, dom_name, dom_sid_str,
true);
}
errno_t ipa_idmap_init(TALLOC_CTX *mem_ctx,
struct sdap_id_ctx *id_ctx,
struct sdap_idmap_ctx **_idmap_ctx)
{
errno_t ret;
TALLOC_CTX *tmp_ctx;
enum idmap_error_code err;
struct sdap_idmap_ctx *idmap_ctx = NULL;
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) return ENOMEM;
idmap_ctx = talloc_zero(tmp_ctx, struct sdap_idmap_ctx);
if (!idmap_ctx) {
ret = ENOMEM;
goto done;
}
idmap_ctx->id_ctx = id_ctx;
idmap_ctx->find_new_domain = ipa_idmap_find_new_domain;
/* Initialize the map */
err = sss_idmap_init(sss_idmap_talloc, idmap_ctx,
sss_idmap_talloc_free,
&idmap_ctx->map);
if (err != IDMAP_SUCCESS) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Could not initialize the ID map: [%s]\n",
idmap_error_string(err));
if (err == IDMAP_OUT_OF_MEMORY) {
ret = ENOMEM;
} else {
ret = EINVAL;
}
goto done;
}
ret = ipa_idmap_get_ranges_from_sysdb(idmap_ctx, NULL, NULL, false);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, "ipa_idmap_get_ranges_from_sysdb failed.\n");
goto done;
}
*_idmap_ctx = talloc_steal(mem_ctx, idmap_ctx);
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}