mirror of
https://github.com/samba-team/samba.git
synced 2025-08-24 21:49:29 +03:00
s4-dsdb: added a samba3sid module
This module allocates SIDs using the Samba3 algorithm, for use with the samba3sam module. Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Andrew Tridgell
@ -137,12 +137,25 @@ SUBSYSTEM = LIBLDB
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INIT_FUNCTION = LDB_MODULE(samba3sam)
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PRIVATE_DEPENDENCIES = LIBTALLOC LIBEVENTS LIBLDB SMBPASSWD \
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NSS_WRAPPER LIBSECURITY NDR_SECURITY
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# End MODULE ldb_samldb
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# End MODULE ldb_samba3sam
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################################################
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ldb_samba3sam_OBJ_FILES = \
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$(dsdbsrcdir)/samdb/ldb_modules/samba3sam.o
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################################################
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# Start MODULE ldb_samba3sid
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[MODULE::ldb_samba3sid]
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SUBSYSTEM = LIBLDB
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INIT_FUNCTION = LDB_MODULE(samba3sid)
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PRIVATE_DEPENDENCIES = LIBTALLOC LIBEVENTS LIBLDB SMBPASSWD \
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NSS_WRAPPER LIBSECURITY NDR_SECURITY
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# End MODULE ldb_samba3sid
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################################################
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ldb_samba3sid_OBJ_FILES = \
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$(dsdbsrcdir)/samdb/ldb_modules/samba3sid.o
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################################################
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# Start MODULE ldb_simple_ldap_map
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[MODULE::ldb_simple_ldap_map]
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194
source4/dsdb/samdb/ldb_modules/samba3sid.c
Normal file
194
source4/dsdb/samdb/ldb_modules/samba3sid.c
Normal file
@ -0,0 +1,194 @@
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/*
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samba3sid module
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Copyright (C) Andrew Bartlett 2010
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Copyright (C) Andrew Tridgell 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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add objectSID to users and groups using samba3 nextRid method
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*/
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#include "includes.h"
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#include "libcli/ldap/ldap_ndr.h"
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#include "ldb_module.h"
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#include "dsdb/samdb/samdb.h"
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#include "dsdb/samdb/ldb_modules/util.h"
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#include "libcli/security/security.h"
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#include "librpc/gen_ndr/ndr_security.h"
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#include "../lib/util/util_ldb.h"
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#include "ldb_wrap.h"
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#include "param/param.h"
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/*
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RID algorithm from pdb_ldap.c in source3/passdb/
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(loosely based on Volkers code)
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*/
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static int samba3sid_next_sid(struct ldb_module *module,
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TALLOC_CTX *mem_ctx, char **sid)
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{
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TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
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struct ldb_result *res;
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const char *attrs[] = { "sambaNextRid", "sambaNextUserRid",
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"sambaNextGroupRid", "sambaSID", NULL };
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int ret;
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struct ldb_context *ldb = ldb_module_get_ctx(module);
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int sambaNextRid, sambaNextGroupRid, sambaNextUserRid;
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struct ldb_message *msg;
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uint32_t rid;
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const char *sambaSID;
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ret = dsdb_module_search(module, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
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attrs, DSDB_SEARCH_SEARCH_ALL_PARTITIONS,
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"(&(objectClass=sambaDomain)(sambaDomainName=%s))",
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lp_sam_name(ldb_get_opaque(ldb, "loadparm")));
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if (ret != LDB_SUCCESS) {
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ldb_asprintf_errstring(ldb,
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__location__
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": Failed to find domain object - %s",
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ldb_errstring(ldb));
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talloc_free(tmp_ctx);
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return ret;
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}
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if (res->count != 1) {
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ldb_asprintf_errstring(ldb,
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__location__
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": Expected exactly 1 domain object - got %u",
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res->count);
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talloc_free(tmp_ctx);
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return ret;
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}
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msg = res->msgs[0];
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sambaNextRid = ldb_msg_find_attr_as_uint(msg, "sambaNextRid", -1);
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sambaNextUserRid = ldb_msg_find_attr_as_uint(msg, "sambaNextUserRid", -1);
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sambaNextGroupRid = ldb_msg_find_attr_as_uint(msg, "sambaNextGroupRid", -1);
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sambaSID = ldb_msg_find_attr_as_string(msg, "sambaSID", NULL);
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if (sambaSID == NULL) {
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ldb_asprintf_errstring(ldb,
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__location__
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": No sambaSID in %s",
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ldb_dn_get_linearized(msg->dn));
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talloc_free(tmp_ctx);
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return ret;
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}
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/* choose the highest of the 3 - see pdb_ldap.c for an
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* explanation */
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rid = sambaNextRid;
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if (sambaNextUserRid > rid) {
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rid = sambaNextUserRid;
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}
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if (sambaNextGroupRid > rid) {
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rid = sambaNextGroupRid;
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}
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if (rid == -1) {
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ldb_asprintf_errstring(ldb,
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__location__
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": No sambaNextRid in %s",
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ldb_dn_get_linearized(msg->dn));
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talloc_free(tmp_ctx);
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return ret;
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}
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(*sid) = talloc_asprintf(tmp_ctx, "%s-%u", sambaSID, rid);
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if (!*sid) {
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ldb_module_oom(module);
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talloc_free(tmp_ctx);
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return LDB_ERR_OPERATIONS_ERROR;
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}
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ret = dsdb_module_constrainted_update_integer(module, msg->dn,
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"sambaNextRid",
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sambaNextRid, rid+1);
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if (ret != LDB_SUCCESS) {
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ldb_asprintf_errstring(ldb,
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__location__
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": Failed to update sambaNextRid - %s",
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ldb_errstring(ldb));
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talloc_free(tmp_ctx);
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return ret;
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}
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talloc_steal(mem_ctx, *sid);
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talloc_free(tmp_ctx);
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return LDB_SUCCESS;
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}
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/* add */
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static int samba3sid_add(struct ldb_module *module, struct ldb_request *req)
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{
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struct ldb_context *ldb;
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int ret;
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const struct ldb_message *msg = req->op.add.message;
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struct ldb_message *new_msg;
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char *sid;
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struct ldb_request *new_req;
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ldb = ldb_module_get_ctx(module);
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/* do not manipulate our control entries */
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if (ldb_dn_is_special(req->op.add.message->dn)) {
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return ldb_next_request(module, req);
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}
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if (!samdb_find_attribute(ldb, msg, "objectclass", "posixAccount") &&
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!samdb_find_attribute(ldb, msg, "objectclass", "posixGroup")) {
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/* its not a user or a group */
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return ldb_next_request(module, req);
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}
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if (ldb_msg_find_element(msg, "sambaSID")) {
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/* a SID was supplied */
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return ldb_next_request(module, req);
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}
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new_msg = ldb_msg_copy_shallow(req, req->op.add.message);
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if (!new_msg) {
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ldb_module_oom(module);
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return LDB_ERR_OPERATIONS_ERROR;
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}
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ret = samba3sid_next_sid(module, new_msg, &sid);
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if (ret != LDB_SUCCESS) {
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return ret;
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}
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ret = ldb_msg_add_steal_string(new_msg, "sambaSID", sid);
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if (ret != LDB_SUCCESS) {
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return ret;
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}
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ret = ldb_build_add_req(&new_req, ldb, req,
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new_msg,
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req->controls,
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req, dsdb_next_callback,
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req);
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if (ret != LDB_SUCCESS) {
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return ret;
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}
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return ldb_next_request(module, new_req);
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}
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_PUBLIC_ const struct ldb_module_ops ldb_samba3sid_module_ops = {
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.name = "samba3sid",
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.add = samba3sid_add,
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};
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