--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ Password and authentication handling
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2010
+ Copyright (C) Stefan Metzmacher 2005
+ Copyright (C) Matthias Dieter Wallnöfer 2009
+
+ 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 "includes.h"
+#include "auth/auth.h"
+#include <ldb.h>
+#include "dsdb/samdb/samdb.h"
+#include "libcli/security/security.h"
+#include "dsdb/common/util.h"
+
+/* This function tests if a SID structure "sids" contains the SID "sid" */
+static bool sids_contains_sid(const struct dom_sid **sids,
+ const unsigned int num_sids,
+ const struct dom_sid *sid)
+{
+ unsigned int i;
+
+ for (i = 0; i < num_sids; i++) {
+ if (dom_sid_equal(sids[i], sid))
+ return true;
+ }
+ return false;
+}
+
+/*
+ * This function generates the transitive closure of a given SAM object "dn_val"
+ * (it basically expands nested memberships).
+ * If the object isn't located in the "res_sids" structure yet and the
+ * "only_childs" flag is false, we add it to "res_sids".
+ * Then we've always to consider the "memberOf" attributes. We invoke the
+ * function recursively on each of it with the "only_childs" flag set to
+ * "false".
+ * The "only_childs" flag is particularly useful if you have a user object and
+ * want to include all it's groups (referenced with "memberOf") but not itself
+ * or considering if that object matches the filter.
+ *
+ * At the beginning "res_sids" should reference to a NULL pointer.
+ */
+NTSTATUS dsdb_expand_nested_groups(struct ldb_context *sam_ctx,
+ struct ldb_val *dn_val, const bool only_childs, const char *filter,
+ TALLOC_CTX *res_sids_ctx, struct dom_sid ***res_sids,
+ unsigned int *num_res_sids)
+{
+ const char * const attrs[] = { "memberOf", NULL };
+ unsigned int i;
+ int ret;
+ bool already_there;
+ struct ldb_dn *dn;
+ struct dom_sid sid;
+ TALLOC_CTX *tmp_ctx;
+ struct ldb_result *res;
+ NTSTATUS status;
+ const struct ldb_message_element *el;
+
+ if (*res_sids == NULL) {
+ *num_res_sids = 0;
+ }
+
+ if (!sam_ctx) {
+ DEBUG(0, ("No SAM available, cannot determine local groups\n"));
+ return NT_STATUS_INVALID_SYSTEM_SERVICE;
+ }
+
+ tmp_ctx = talloc_new(res_sids_ctx);
+
+ dn = ldb_dn_from_ldb_val(tmp_ctx, sam_ctx, dn_val);
+ if (dn == NULL) {
+ talloc_free(tmp_ctx);
+ DEBUG(0, (__location__ ": we failed parsing DN %.*s, so we cannot calculate the group token\n",
+ (int)dn_val->length, dn_val->data));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ status = dsdb_get_extended_dn_sid(dn, &sid, "SID");
+ if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
+ /* If we fail finding a SID then this is no error since it could
+ * be a non SAM object - e.g. a group with object class
+ * "groupOfNames" */
+ talloc_free(tmp_ctx);
+ return NT_STATUS_OK;
+ } else if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, (__location__ ": when parsing DN '%s' we failed to parse it's SID component, so we cannot calculate the group token: %s\n",
+ ldb_dn_get_extended_linearized(tmp_ctx, dn, 1),
+ nt_errstr(status)));
+ talloc_free(tmp_ctx);
+ return status;
+ }
+
+ if (only_childs) {
+ ret = dsdb_search_dn(sam_ctx, tmp_ctx, &res, dn, attrs,
+ DSDB_SEARCH_SHOW_EXTENDED_DN);
+ } else {
+ /* This is an O(n^2) linear search */
+ already_there = sids_contains_sid((const struct dom_sid**) *res_sids,
+ *num_res_sids, &sid);
+ if (already_there) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_OK;
+ }
+
+ ret = dsdb_search(sam_ctx, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
+ attrs, DSDB_SEARCH_SHOW_EXTENDED_DN, "%s",
+ filter);
+ }
+
+ if (ret == LDB_ERR_NO_SUCH_OBJECT) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_OK;
+ }
+
+ if (ret != LDB_SUCCESS) {
+ DEBUG(1, (__location__ ": dsdb_search for %s failed: %s\n",
+ ldb_dn_get_extended_linearized(tmp_ctx, dn, 1),
+ ldb_errstring(sam_ctx)));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ /* We may get back 0 results, if the SID didn't match the filter - such as it wasn't a domain group, for example */
+ if (res->count != 1) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_OK;
+ }
+
+ /* We only apply this test once we know the SID matches the filter */
+ if (!only_childs) {
+ *res_sids = talloc_realloc(res_sids_ctx, *res_sids,
+ struct dom_sid *, *num_res_sids + 1);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(*res_sids, tmp_ctx);
+ (*res_sids)[*num_res_sids] = dom_sid_dup(*res_sids, &sid);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE((*res_sids)[*num_res_sids], tmp_ctx);
+ ++(*num_res_sids);
+ }
+
+ el = ldb_msg_find_element(res->msgs[0], "memberOf");
+
+ for (i = 0; el && i < el->num_values; i++) {
+ status = dsdb_expand_nested_groups(sam_ctx, &el->values[i],
+ false, filter, res_sids_ctx, res_sids, num_res_sids);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return status;
+ }
+ }
+
+ talloc_free(tmp_ctx);
+
+ return NT_STATUS_OK;
+}
/*
ldb database library
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2010
Copyright (C) Andrew Tridgell 2005
Copyright (C) Simo Sorce 2006-2008
Copyright (C) Matthias Dieter Wallnöfer 2009
struct ldb_message *msg, enum ldb_scope scope)
{
struct ldb_context *ldb = ldb_module_get_ctx(module);;
- struct auth_context *auth_context;
- struct auth_serversupplied_info *server_info;
- struct auth_session_info *session_info;
TALLOC_CTX *tmp_ctx = talloc_new(msg);
- uint32_t i;
+ unsigned int i;
int ret;
+ const char *filter;
NTSTATUS status;
+ struct dom_sid *primary_group_sid;
+ const char *primary_group_string;
+ const char *primary_group_dn;
+ DATA_BLOB primary_group_blob;
+
+ struct dom_sid *account_sid;
+ const char *account_sid_string;
+ const char *account_sid_dn;
+ DATA_BLOB account_sid_blob;
+ struct dom_sid **groupSIDs = NULL;
+ unsigned int num_groupSIDs = 0;
+
+ struct dom_sid *domain_sid;
+
if (scope != LDB_SCOPE_BASE) {
ldb_set_errstring(ldb, "Cannot provide tokenGroups attribute, this is not a BASE search");
return LDB_ERR_OPERATIONS_ERROR;
}
- status = auth_context_create_from_ldb(tmp_ctx, ldb, &auth_context);
- if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
+ /* If it's not a user, it won't have a primaryGroupID */
+ if (ldb_msg_find_element(msg, "primaryGroupID") == NULL) {
+ talloc_free(tmp_ctx);
+ return LDB_SUCCESS;
+ }
+
+ /* Ensure it has an objectSID too */
+ account_sid = samdb_result_dom_sid(tmp_ctx, msg, "objectSid");
+ if (account_sid == NULL) {
+ talloc_free(tmp_ctx);
+ return LDB_SUCCESS;
+ }
+
+ status = dom_sid_split_rid(tmp_ctx, account_sid, &domain_sid, NULL);
+ if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
talloc_free(tmp_ctx);
- return ldb_module_oom(module);
+ return LDB_ERR_INVALID_ATTRIBUTE_SYNTAX;
} else if (!NT_STATUS_IS_OK(status)) {
- ldb_set_errstring(ldb, "Cannot provide tokenGroups attribute, could not create authContext");
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
- status = auth_get_server_info_principal(tmp_ctx, auth_context, NULL, msg->dn, &server_info);
- if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
+ primary_group_sid = dom_sid_add_rid(tmp_ctx,
+ domain_sid,
+ ldb_msg_find_attr_as_uint(msg, "primaryGroupID", ~0));
+ if (!primary_group_sid) {
talloc_free(tmp_ctx);
- return ldb_module_oom(module);
- } else if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)) {
- /* Not a user, we have no tokenGroups */
+ return ldb_oom(ldb);
+ }
+
+ /* Filter out builtin groups from this token. We will search
+ * for builtin groups later, and not include them in the
+ * tokenGroups (and therefore the PAC or SamLogon validation
+ * info) */
+ filter = talloc_asprintf(tmp_ctx, "(&(objectClass=group)(!(groupType:1.2.840.113556.1.4.803:=%u))(groupType:1.2.840.113556.1.4.803:=%u))", GROUP_TYPE_BUILTIN_LOCAL_GROUP, GROUP_TYPE_SECURITY_ENABLED);
+ if (!filter) {
talloc_free(tmp_ctx);
- return LDB_SUCCESS;
- } else if (!NT_STATUS_IS_OK(status)) {
+ return ldb_oom(ldb);
+ }
+
+ primary_group_string = dom_sid_string(tmp_ctx, primary_group_sid);
+ if (!primary_group_string) {
talloc_free(tmp_ctx);
- ldb_asprintf_errstring(ldb, "Cannot provide tokenGroups attribute: auth_get_server_info_principal failed: %s", nt_errstr(status));
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
- status = auth_generate_session_info(tmp_ctx, auth_context->lp_ctx, ldb, server_info, 0, &session_info);
- if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
+ primary_group_dn = talloc_asprintf(tmp_ctx, "<SID=%s>", primary_group_string);
+ if (!primary_group_dn) {
talloc_free(tmp_ctx);
- return ldb_module_oom(module);
- } else if (!NT_STATUS_IS_OK(status)) {
+ return ldb_oom(ldb);
+ }
+
+ primary_group_blob = data_blob_string_const(primary_group_dn);
+
+ account_sid_string = dom_sid_string(tmp_ctx, account_sid);
+ if (!account_sid_string) {
+ talloc_free(tmp_ctx);
+ return ldb_oom(ldb);
+ }
+
+ account_sid_dn = talloc_asprintf(tmp_ctx, "<SID=%s>", account_sid_string);
+ if (!account_sid_dn) {
+ talloc_free(tmp_ctx);
+ return ldb_oom(ldb);
+ }
+
+ account_sid_blob = data_blob_string_const(account_sid_dn);
+
+ status = dsdb_expand_nested_groups(ldb, &account_sid_blob,
+ true, /* We don't want to add the object's SID itself,
+ it's not returend in this attribute */
+ filter,
+ tmp_ctx, &groupSIDs, &num_groupSIDs);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ ldb_asprintf_errstring(ldb, "Failed to construct tokenGroups: expanding groups of SID %s failed: %s",
+ account_sid_string, nt_errstr(status));
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* Expands the primary group - this function takes in
+ * memberOf-like values, so we fake one up with the
+ * <SID=S-...> format of DN and then let it expand
+ * them, as long as they meet the filter - so only
+ * domain groups, not builtin groups
+ */
+ status = dsdb_expand_nested_groups(ldb, &primary_group_blob, false, filter,
+ tmp_ctx, &groupSIDs, &num_groupSIDs);
+ if (!NT_STATUS_IS_OK(status)) {
+ ldb_asprintf_errstring(ldb, "Failed to construct tokenGroups: expanding groups of SID %s failed: %s",
+ account_sid_string, nt_errstr(status));
talloc_free(tmp_ctx);
- ldb_asprintf_errstring(ldb, "Cannot provide tokenGroups attribute: auth_generate_session_info failed: %s", nt_errstr(status));
return LDB_ERR_OPERATIONS_ERROR;
}
- /* We start at 1, as the first SID is the user's SID, not included in the tokenGroups */
- for (i = 1; i < session_info->security_token->num_sids; i++) {
- ret = samdb_msg_add_dom_sid(ldb, msg, msg,
- "tokenGroups",
- &session_info->security_token->sids[i]);
- if (ret != LDB_SUCCESS) {
+ for (i=0; i < num_groupSIDs; i++) {
+ ret = samdb_msg_add_dom_sid(ldb, msg, msg, "tokenGroups", groupSIDs[i]);
+ if (ret) {
talloc_free(tmp_ctx);
return ret;
}
{ "structuralObjectClass", NULL, NULL , NULL },
{ "canonicalName", NULL, NULL , construct_canonical_name },
{ "primaryGroupToken", "objectClass", "objectSid", construct_primary_group_token },
- { "tokenGroups", "objectClass", NULL, construct_token_groups },
+ { "tokenGroups", "primaryGroupID", "objectSid", construct_token_groups },
{ "parentGUID", NULL, NULL, construct_parent_guid },
{ "subSchemaSubEntry", NULL, NULL, construct_subschema_subentry },
{ "msDS-isRODC", "objectClass", "objectCategory", construct_msds_isrodc },
git.samba.org / ira / wip.git / commitdiff