Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 207 insertions, 0 deletions

diff --git a/source4/dsdb/samdb/ldb_modules/samba3sid.c b/source4/dsdb/samdb/ldb_modules/samba3sid.c
new file mode 100644
index 0000000..f38ab40
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/samba3sid.c
@@ -0,0 +1,207 @@
+/*
+   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 "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,
+			      struct ldb_request *parent)
+{
+	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);
+	struct ldb_message *msg;
+	uint32_t sambaNextRid, sambaNextGroupRid, sambaNextUserRid, rid;
+	const char *sambaSID;
+
+	ret = dsdb_module_search(module, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
+				 attrs,
+				 DSDB_FLAG_NEXT_MODULE |
+				 DSDB_SEARCH_SEARCH_ALL_PARTITIONS,
+				 parent,
+				 "(&(objectClass=sambaDomain)(sambaDomainName=%s))",
+				 lpcfg_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 LDB_ERR_OPERATIONS_ERROR;
+	}
+	msg = res->msgs[0];
+
+	sambaNextRid = ldb_msg_find_attr_as_uint(msg, "sambaNextRid",
+						 (uint32_t) -1);
+	sambaNextUserRid = ldb_msg_find_attr_as_uint(msg, "sambaNextUserRid",
+						     (uint32_t) -1);
+	sambaNextGroupRid = ldb_msg_find_attr_as_uint(msg, "sambaNextGroupRid",
+						      (uint32_t) -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 LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	/* choose the highest of the 3 - see pdb_ldap.c for an
+	 * explaination */
+	rid = sambaNextRid;
+	if ((sambaNextUserRid != (uint32_t) -1) && (sambaNextUserRid > rid)) {
+		rid = sambaNextUserRid;
+	}
+	if ((sambaNextGroupRid != (uint32_t) -1) && (sambaNextGroupRid > rid)) {
+		rid = sambaNextGroupRid;
+	}
+	if (rid == (uint32_t) -1) {
+		ldb_asprintf_errstring(ldb,
+				       __location__
+				       ": No sambaNextRid in %s",
+				       ldb_dn_get_linearized(msg->dn));
+		talloc_free(tmp_ctx);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	/* sambaNextRid is actually the previous RID .... */
+	rid += 1;
+
+	(*sid) = talloc_asprintf(tmp_ctx, "%s-%u", sambaSID, rid);
+	if (!*sid) {
+		talloc_free(tmp_ctx);
+		return ldb_module_oom(module);
+	}
+
+	ret = dsdb_module_constrainted_update_uint32(module, msg->dn,
+						     "sambaNextRid",
+						     &sambaNextRid, &rid, parent);
+	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) {
+		return ldb_module_oom(module);
+	}
+
+	ret = samba3sid_next_sid(module, new_msg, &sid, req);
+	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);
+	LDB_REQ_SET_LOCATION(new_req);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	return ldb_next_request(module, new_req);
+}
+
+static const struct ldb_module_ops ldb_samba3sid_module_ops = {
+	.name          = "samba3sid",
+	.add           = samba3sid_add,
+};
+
+
+int ldb_samba3sid_module_init(const char *version)
+{
+	LDB_MODULE_CHECK_VERSION(version);
+	return ldb_register_module(&ldb_samba3sid_module_ops);
+}