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authorAndrew Tridgell <tridge@samba.org>2010-01-08 12:14:39 +1100
committerAndrew Tridgell <tridge@samba.org>2010-01-08 13:03:07 +1100
commitdd61336165396f8aaccde1320de26bae789fb324 (patch)
treeeffdedeef85e8cd8a0bbff1b2c965b17cf728187 /source4/dsdb/samdb
parent66f161dee13fc027ea0253abdf40dfb7dc4bffa3 (diff)
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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>
Diffstat (limited to 'source4/dsdb/samdb')
-rw-r--r--source4/dsdb/samdb/ldb_modules/config.mk15
-rw-r--r--source4/dsdb/samdb/ldb_modules/samba3sid.c194
2 files changed, 208 insertions, 1 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/config.mk b/source4/dsdb/samdb/ldb_modules/config.mk
index 7dfe58451f..f9f1714358 100644
--- a/source4/dsdb/samdb/ldb_modules/config.mk
+++ b/source4/dsdb/samdb/ldb_modules/config.mk
@@ -137,13 +137,26 @@ SUBSYSTEM = LIBLDB
INIT_FUNCTION = LDB_MODULE(samba3sam)
PRIVATE_DEPENDENCIES = LIBTALLOC LIBEVENTS LIBLDB SMBPASSWD \
NSS_WRAPPER LIBSECURITY NDR_SECURITY
-# End MODULE ldb_samldb
+# End MODULE ldb_samba3sam
################################################
ldb_samba3sam_OBJ_FILES = \
$(dsdbsrcdir)/samdb/ldb_modules/samba3sam.o
################################################
+# Start MODULE ldb_samba3sid
+[MODULE::ldb_samba3sid]
+SUBSYSTEM = LIBLDB
+INIT_FUNCTION = LDB_MODULE(samba3sid)
+PRIVATE_DEPENDENCIES = LIBTALLOC LIBEVENTS LIBLDB SMBPASSWD \
+ NSS_WRAPPER LIBSECURITY NDR_SECURITY
+# End MODULE ldb_samba3sid
+################################################
+
+ldb_samba3sid_OBJ_FILES = \
+ $(dsdbsrcdir)/samdb/ldb_modules/samba3sid.o
+
+################################################
# Start MODULE ldb_simple_ldap_map
[MODULE::ldb_simple_ldap_map]
SUBSYSTEM = LIBLDB
diff --git a/source4/dsdb/samdb/ldb_modules/samba3sid.c b/source4/dsdb/samdb/ldb_modules/samba3sid.c
new file mode 100644
index 0000000000..6ea5742e6d
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/samba3sid.c
@@ -0,0 +1,194 @@
+/*
+ samba3sid module
+
+ Copyright (C) Andrew Bartlett 2010
+ Copyright (C) Andrew Tridgell 2010
+
+ 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/>.
+*/
+
+/*
+ add objectSID to users and groups using samba3 nextRid method
+ */
+
+#include "includes.h"
+#include "libcli/ldap/ldap_ndr.h"
+#include "ldb_module.h"
+#include "dsdb/samdb/samdb.h"
+#include "dsdb/samdb/ldb_modules/util.h"
+#include "libcli/security/security.h"
+#include "librpc/gen_ndr/ndr_security.h"
+#include "../lib/util/util_ldb.h"
+#include "ldb_wrap.h"
+#include "param/param.h"
+
+/*
+ RID algorithm from pdb_ldap.c in source3/passdb/
+ (loosely based on Volkers code)
+ */
+static int samba3sid_next_sid(struct ldb_module *module,
+ TALLOC_CTX *mem_ctx, char **sid)
+{
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ struct ldb_result *res;
+ const char *attrs[] = { "sambaNextRid", "sambaNextUserRid",
+ "sambaNextGroupRid", "sambaSID", NULL };
+ int ret;
+ struct ldb_context *ldb = ldb_module_get_ctx(module);
+ int sambaNextRid, sambaNextGroupRid, sambaNextUserRid;
+ struct ldb_message *msg;
+ uint32_t rid;
+ const char *sambaSID;
+
+ ret = dsdb_module_search(module, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
+ attrs, DSDB_SEARCH_SEARCH_ALL_PARTITIONS,
+ "(&(objectClass=sambaDomain)(sambaDomainName=%s))",
+ lp_sam_name(ldb_get_opaque(ldb, "loadparm")));
+ if (ret != LDB_SUCCESS) {
+ ldb_asprintf_errstring(ldb,
+ __location__
+ ": Failed to find domain object - %s",
+ ldb_errstring(ldb));
+ talloc_free(tmp_ctx);
+ return ret;
+ }
+ if (res->count != 1) {
+ ldb_asprintf_errstring(ldb,
+ __location__
+ ": Expected exactly 1 domain object - got %u",
+ res->count);
+ talloc_free(tmp_ctx);
+ return ret;
+ }
+ msg = res->msgs[0];
+
+ sambaNextRid = ldb_msg_find_attr_as_uint(msg, "sambaNextRid", -1);
+ sambaNextUserRid = ldb_msg_find_attr_as_uint(msg, "sambaNextUserRid", -1);
+ sambaNextGroupRid = ldb_msg_find_attr_as_uint(msg, "sambaNextGroupRid", -1);
+ sambaSID = ldb_msg_find_attr_as_string(msg, "sambaSID", NULL);
+
+ if (sambaSID == NULL) {
+ ldb_asprintf_errstring(ldb,
+ __location__
+ ": No sambaSID in %s",
+ ldb_dn_get_linearized(msg->dn));
+ talloc_free(tmp_ctx);
+ return ret;
+ }
+
+ /* choose the highest of the 3 - see pdb_ldap.c for an
+ * explanation */
+ rid = sambaNextRid;
+ if (sambaNextUserRid > rid) {
+ rid = sambaNextUserRid;
+ }
+ if (sambaNextGroupRid > rid) {
+ rid = sambaNextGroupRid;
+ }
+ if (rid == -1) {
+ ldb_asprintf_errstring(ldb,
+ __location__
+ ": No sambaNextRid in %s",
+ ldb_dn_get_linearized(msg->dn));
+ talloc_free(tmp_ctx);
+ return ret;
+ }
+
+ (*sid) = talloc_asprintf(tmp_ctx, "%s-%u", sambaSID, rid);
+ if (!*sid) {
+ ldb_module_oom(module);
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ ret = dsdb_module_constrainted_update_integer(module, msg->dn,
+ "sambaNextRid",
+ sambaNextRid, rid+1);
+ if (ret != LDB_SUCCESS) {
+ ldb_asprintf_errstring(ldb,
+ __location__
+ ": Failed to update sambaNextRid - %s",
+ ldb_errstring(ldb));
+ talloc_free(tmp_ctx);
+ return ret;
+ }
+
+ talloc_steal(mem_ctx, *sid);
+ talloc_free(tmp_ctx);
+ return LDB_SUCCESS;
+}
+
+
+
+/* add */
+static int samba3sid_add(struct ldb_module *module, struct ldb_request *req)
+{
+ struct ldb_context *ldb;
+ int ret;
+ const struct ldb_message *msg = req->op.add.message;
+ struct ldb_message *new_msg;
+ char *sid;
+ struct ldb_request *new_req;
+
+ ldb = ldb_module_get_ctx(module);
+
+ /* do not manipulate our control entries */
+ if (ldb_dn_is_special(req->op.add.message->dn)) {
+ return ldb_next_request(module, req);
+ }
+
+ if (!samdb_find_attribute(ldb, msg, "objectclass", "posixAccount") &&
+ !samdb_find_attribute(ldb, msg, "objectclass", "posixGroup")) {
+ /* its not a user or a group */
+ return ldb_next_request(module, req);
+ }
+
+ if (ldb_msg_find_element(msg, "sambaSID")) {
+ /* a SID was supplied */
+ return ldb_next_request(module, req);
+ }
+
+ new_msg = ldb_msg_copy_shallow(req, req->op.add.message);
+ if (!new_msg) {
+ ldb_module_oom(module);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ ret = samba3sid_next_sid(module, new_msg, &sid);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ ret = ldb_msg_add_steal_string(new_msg, "sambaSID", sid);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ ret = ldb_build_add_req(&new_req, ldb, req,
+ new_msg,
+ req->controls,
+ req, dsdb_next_callback,
+ req);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ return ldb_next_request(module, new_req);
+}
+
+_PUBLIC_ const struct ldb_module_ops ldb_samba3sid_module_ops = {
+ .name = "samba3sid",
+ .add = samba3sid_add,
+};
+