s3-passdb: added pdb_samba4

This uses direct LDB operations and calls to the dsdb library to allow
passdb operations (such as pdbedit and smbpasswd) offline, and uses
transactions internally for database consistency.

Pair-Programmed-With: Andrew Tridgell <tridge@samba.org>

2 files changed, 2123 insertions, 0 deletions

diff --git a/source3/passdb/pdb_samba4.c b/source3/passdb/pdb_samba4.c
new file mode 100644
index 0000000000..558f8d034c
--- /dev/null
+++ b/source3/passdb/pdb_samba4.c
@@ -0,0 +1,2113 @@
+/*
+   Unix SMB/CIFS implementation.
+   pdb glue module for samba4
+   Copyright (C) Volker Lendecke 2009-2011
+   Copyright (C) Andrew Bartlett 2010
+   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/>.
+*/
+
+/* This module, is a port of Volker's pdb_ads to ldb and DSDB APIs */
+
+#include "includes.h"
+#include "source3/include/passdb.h"
+#include "source4/dsdb/samdb/samdb.h"
+#include "ldb_errors.h"
+#include "libcli/security/dom_sid.h"
+#include "source4/winbind/idmap.h"
+#include "librpc/gen_ndr/ndr_security.h"
+#include "libds/common/flag_mapping.h"
+#include "source4/lib/events/events.h"
+#include "source4/auth/session.h"
+#include "source4/auth/system_session_proto.h"
+#include "source4/param/param.h"
+
+struct pdb_samba4_state {
+	struct tevent_context *ev;
+	struct ldb_context *ldb;
+	struct idmap_context *idmap_ctx;
+	struct loadparm_context *lp_ctx;
+};
+
+static NTSTATUS pdb_samba4_getsampwsid(struct pdb_methods *m,
+				    struct samu *sam_acct,
+				    const struct dom_sid *sid);
+static NTSTATUS pdb_samba4_getsamupriv(struct pdb_samba4_state *state,
+				    const char *filter,
+				    TALLOC_CTX *mem_ctx,
+				    struct ldb_message **pmsg);
+static bool pdb_samba4_sid_to_id(struct pdb_methods *m, const struct dom_sid *sid,
+				 union unid_t *id, enum lsa_SidType *type);
+
+static bool pdb_samba4_pull_time(struct ldb_message *msg, const char *attr,
+			      time_t *ptime)
+{
+	uint64_t tmp;
+	if (! ldb_msg_find_element(msg, attr)) {
+		return false;
+	}
+	tmp = ldb_msg_find_attr_as_uint64(msg, attr, 0);
+	*ptime = uint64s_nt_time_to_unix_abs(&tmp);
+	return true;
+}
+
+static struct pdb_domain_info *pdb_samba4_get_domain_info(
+	struct pdb_methods *m, TALLOC_CTX *mem_ctx)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct pdb_domain_info *info;
+	struct dom_sid *domain_sid;
+	struct ldb_dn *forest_dn, *domain_dn;
+	struct ldb_result *dom_res = NULL;
+	const char *dom_attrs[] = {
+		"objectSid", 
+		"objectGUID", 
+		"nTMixedDomain",
+		"fSMORoleOwner",
+		NULL
+	};
+	char *p;
+	int ret;
+
+	info = talloc(mem_ctx, struct pdb_domain_info);
+	if (info == NULL) {
+		return NULL;
+	}
+
+	domain_dn = ldb_get_default_basedn(state->ldb); 
+
+	ret = ldb_search(state->ldb, info, &dom_res,
+			 domain_dn, LDB_SCOPE_BASE, dom_attrs, NULL);
+	if (ret != LDB_SUCCESS) {
+		goto fail;
+	}
+	if (dom_res->count != 1) {
+		goto fail;
+	}
+
+	info->guid = samdb_result_guid(dom_res->msgs[0], "objectGUID");
+
+	domain_sid = samdb_result_dom_sid(state, dom_res->msgs[0], "objectSid");
+	if (!domain_sid) {
+		goto fail;
+	}
+	info->sid = *domain_sid;
+
+	TALLOC_FREE(dom_res);
+
+	info->name = talloc_strdup(info, lpcfg_sam_name(state->lp_ctx));
+	info->dns_domain = ldb_dn_canonical_string(info, domain_dn);
+
+	if (!info->dns_domain) {
+		goto fail;
+	}
+	p = strchr(info->dns_domain, '/');
+	if (p) {
+		*p = '\0';
+	}
+
+	forest_dn = ldb_get_root_basedn(state->ldb);
+	if (!forest_dn) {
+		goto fail;
+	}
+
+	info->dns_forest = ldb_dn_canonical_string(info, forest_dn);
+	if (!info->dns_forest) {
+		goto fail;
+	}
+	p = strchr(info->dns_forest, '/');
+	if (p) {
+		*p = '\0';
+	}
+
+	return info;
+
+fail:
+	TALLOC_FREE(dom_res);
+	TALLOC_FREE(info);
+	return NULL;
+}
+
+static struct ldb_message *pdb_samba4_get_samu_private(
+	struct pdb_methods *m, struct samu *sam)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct ldb_message *msg;
+	char *sidstr, *filter;
+	NTSTATUS status;
+
+	msg = (struct ldb_message *)
+		pdb_get_backend_private_data(sam, m);
+
+	if (msg != NULL) {
+		return talloc_get_type_abort(msg, struct ldb_message);
+	}
+
+	sidstr = dom_sid_string(talloc_tos(), pdb_get_user_sid(sam));
+	if (sidstr == NULL) {
+		return NULL;
+	}
+
+	filter = talloc_asprintf(
+		talloc_tos(), "(&(objectsid=%s)(objectclass=user))", sidstr);
+	TALLOC_FREE(sidstr);
+	if (filter == NULL) {
+		return NULL;
+	}
+
+	status = pdb_samba4_getsamupriv(state, filter, sam, &msg);
+	TALLOC_FREE(filter);
+	if (!NT_STATUS_IS_OK(status)) {
+		return NULL;
+	}
+
+	return msg;
+}
+
+static NTSTATUS pdb_samba4_init_sam_from_priv(struct pdb_methods *m,
+					   struct samu *sam,
+					   struct ldb_message *msg)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	TALLOC_CTX *frame = talloc_stackframe();
+	NTSTATUS status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+	const char *str;
+	time_t tmp_time;
+	struct dom_sid *sid, group_sid;
+	uint64_t n;
+	const DATA_BLOB *blob;
+
+	str = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
+	if (str == NULL) {
+		DEBUG(10, ("no samAccountName\n"));
+		goto fail;
+	}
+	pdb_set_username(sam, str, PDB_SET);
+
+	if (pdb_samba4_pull_time(msg, "lastLogon", &tmp_time)) {
+		pdb_set_logon_time(sam, tmp_time, PDB_SET);
+	}
+	if (pdb_samba4_pull_time(msg, "lastLogoff", &tmp_time)) {
+		pdb_set_logoff_time(sam, tmp_time, PDB_SET);
+	}
+	if (pdb_samba4_pull_time(msg, "pwdLastSet", &tmp_time)) {
+		pdb_set_pass_last_set_time(sam, tmp_time, PDB_SET);
+	}
+	if (pdb_samba4_pull_time(msg, "accountExpires", &tmp_time)) {
+		pdb_set_kickoff_time(sam, tmp_time, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "displayName",
+					    NULL);
+	if (str != NULL) {
+		pdb_set_fullname(sam, str, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "homeDirectory",
+					    NULL);
+	if (str != NULL) {
+		pdb_set_homedir(sam, str, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "homeDrive", NULL);
+	if (str != NULL) {
+		pdb_set_dir_drive(sam, str, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "scriptPath", NULL);
+	if (str != NULL) {
+		pdb_set_logon_script(sam, str, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "profilePath",
+					    NULL);
+	if (str != NULL) {
+		pdb_set_profile_path(sam, str, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "profilePath",
+					    NULL);
+	if (str != NULL) {
+		pdb_set_profile_path(sam, str, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "comment",
+					    NULL);
+	if (str != NULL) {
+		pdb_set_comment(sam, str, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "description",
+					    NULL);
+	if (str != NULL) {
+		pdb_set_acct_desc(sam, str, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "userWorkstations",
+					    NULL);
+	if (str != NULL) {
+		pdb_set_workstations(sam, str, PDB_SET);
+	}
+
+	str = ldb_msg_find_attr_as_string(msg, "userParameters",
+					    NULL);
+	if (str != NULL) {
+		pdb_set_munged_dial(sam, str, PDB_SET);
+	}
+
+	sid = samdb_result_dom_sid(talloc_tos(), msg, "objectSid");
+	if (!sid) {
+		DEBUG(10, ("Could not pull SID\n"));
+		goto fail;
+	}
+	pdb_set_user_sid(sam, sid, PDB_SET);
+
+	n = ldb_msg_find_attr_as_uint(msg, "userAccountControl", 0);
+	if (n == 0) {
+		DEBUG(10, ("Could not pull userAccountControl\n"));
+		goto fail;
+	}
+	pdb_set_acct_ctrl(sam, ds_uf2acb(n), PDB_SET);
+
+	blob = ldb_msg_find_ldb_val(msg, "unicodePwd");
+	if (blob) {
+		if (blob->length != NT_HASH_LEN) {
+			DEBUG(0, ("Got NT hash of length %d, expected %d\n",
+				  (int)blob->length, NT_HASH_LEN));
+			goto fail;
+		}
+		pdb_set_nt_passwd(sam, blob->data, PDB_SET);
+	}
+	
+	blob = ldb_msg_find_ldb_val(msg, "dBCSPwd");
+	if (blob) {
+		if (blob->length != LM_HASH_LEN) {
+			DEBUG(0, ("Got LM hash of length %d, expected %d\n",
+				  (int)blob->length, LM_HASH_LEN));
+			goto fail;
+		}
+		pdb_set_lanman_passwd(sam, blob->data, PDB_SET);
+	}
+	
+	n = ldb_msg_find_attr_as_uint(msg, "primaryGroupID", 0);
+	if (n == 0) {
+		DEBUG(10, ("Could not pull primaryGroupID\n"));
+		goto fail;
+	}
+	sid_compose(&group_sid, samdb_domain_sid(state->ldb), n);
+	pdb_set_group_sid(sam, &group_sid, PDB_SET);
+
+	status = NT_STATUS_OK;
+fail:
+	TALLOC_FREE(frame);
+	return status;
+}
+
+static bool pdb_samba4_add_time(struct ldb_message *msg, 
+				const char *attrib, time_t t)
+{
+	uint64_t nt_time;
+
+	unix_to_nt_time(&nt_time, t);
+
+	return ldb_msg_add_fmt(msg, attrib, "%llu", nt_time);
+}
+
+/* Like in pdb_ldap(), this will need to be a function pointer when we
+ * start to support 'adds' for migrations from samba3 passdb backends
+ * to samba4 */
+static bool update_required(struct samu *sam, enum pdb_elements element)
+{
+	return (IS_SAM_CHANGED(sam, element));
+}
+
+static bool pdb_samba4_init_samba4_from_sam(struct pdb_samba4_state *state,
+					    struct ldb_message *existing,
+					    TALLOC_CTX *mem_ctx,
+					    struct ldb_message **pmods, 
+					    struct samu *sam)
+{
+	int ret = LDB_SUCCESS;
+	const char *pw;
+	struct ldb_message *msg;
+
+	/* TODO: All fields :-) */
+
+	msg = ldb_msg_new(mem_ctx);
+	if (!msg) {
+		return false;
+	}
+
+	msg->dn = existing->dn;
+
+	pw = pdb_get_plaintext_passwd(sam);
+	if (update_required(sam, PDB_PLAINTEXT_PW)) {
+		if (pw == NULL) {
+			ret = LDB_ERR_OPERATIONS_ERROR;
+			goto fail;
+		}
+		
+		ret |= ldb_msg_add_string(msg, "clearTextPassword", pw);
+	}
+
+	if (update_required(sam, PDB_FULLNAME)) {
+		ret |= ldb_msg_add_string(msg, "displayName", pdb_get_fullname(sam));
+	}
+
+	if (update_required(sam, PDB_SMBHOME)) {
+		ret |= ldb_msg_add_string(msg, "homeDirectory",
+					  pdb_get_homedir(sam));
+	}
+
+	if (update_required(sam, PDB_PROFILE)) {
+		ret |= ldb_msg_add_string(msg, "profilePath",
+					  pdb_get_profile_path(sam));
+	}
+
+	if (update_required(sam, PDB_DRIVE)) {
+		ret |= ldb_msg_add_string(msg, "homeDrive",
+					  pdb_get_dir_drive(sam));
+	}
+
+	if (update_required(sam, PDB_LOGONSCRIPT)) {
+		ret |= ldb_msg_add_string(msg, "scriptPath",
+					  pdb_get_logon_script(sam));
+	}
+
+	if (update_required(sam, PDB_KICKOFFTIME)) {
+		ret |= pdb_samba4_add_time(msg, "accountExpires",
+					pdb_get_kickoff_time(sam));
+	}
+
+	if (update_required(sam, PDB_USERNAME)) {
+		ret |= ldb_msg_add_string(msg, "samAccountName",
+					  pdb_get_username(sam));
+	}
+
+	if (update_required(sam, PDB_HOURSLEN) || update_required(sam, PDB_HOURS)) {
+		struct ldb_val hours = data_blob_const(pdb_get_hours(sam), pdb_get_hours_len(sam));
+		ret |= ldb_msg_add_value(msg, "logonHours",
+					 &hours, NULL);
+	}
+
+	if (update_required(sam, PDB_ACCTCTRL)) {
+		ret |= ldb_msg_add_fmt(msg, "userAccountControl",
+				       "%d", ds_acb2uf(pdb_get_acct_ctrl(sam)));
+	}
+
+	if (update_required(sam, PDB_COMMENT)) {
+		ret |= ldb_msg_add_string(msg, "comment",
+					  pdb_get_comment(sam));
+	}
+
+	if (update_required(sam, PDB_ACCTDESC)) {
+		ret |= ldb_msg_add_string(msg, "description",
+					  pdb_get_acct_desc(sam));
+	}
+
+	if (update_required(sam, PDB_WORKSTATIONS)) {
+		ret |= ldb_msg_add_string(msg, "userWorkstations",
+					  pdb_get_workstations(sam));
+	}
+
+	/* This will need work, it is actually a UTF8 'string' with internal NULLs, to handle TS parameters */
+	if (update_required(sam, PDB_MUNGEDDIAL)) {
+		ret |= ldb_msg_add_string(msg, "userParameters",
+					  pdb_get_munged_dial(sam));
+	}
+
+	if (update_required(sam, PDB_COUNTRY_CODE)) {
+		ret |= ldb_msg_add_fmt(msg, "countryCode",
+				       "%i", (int)pdb_get_country_code(sam));
+	}
+
+	if (update_required(sam, PDB_CODE_PAGE)) {
+		ret |= ldb_msg_add_fmt(msg, "codePage",
+				       "%i", (int)pdb_get_code_page(sam));
+	}
+
+	/* Not yet handled here or not meaningful for modifies on a Samba4 backend:
+	PDB_LOGONTIME,
+	PDB_LOGOFFTIME,
+	PDB_BAD_PASSWORD_TIME,
+	PDB_CANCHANGETIME,
+	PDB_MUSTCHANGETIME,
+	PDB_DOMAIN,
+	PDB_NTUSERNAME,
+	PDB_LOGONDIVS,
+	PDB_USERSID,
+	PDB_GROUPSID,
+	PDB_PASSLASTSET,
+	PDB_FIELDS_PRESENT,
+	PDB_BAD_PASSWORD_COUNT,
+	PDB_LOGON_COUNT,
+	PDB_UNKNOWN6,
+	PDB_LMPASSWD,
+	PDB_NTPASSWD,
+	PDB_PWHISTORY,
+	PDB_BACKEND_PRIVATE_DATA,
+
+ */
+
+	*pmods = msg;
+fail:
+	return ret == LDB_SUCCESS;
+}
+
+static NTSTATUS pdb_samba4_getsamupriv(struct pdb_samba4_state *state,
+				    const char *filter,
+				    TALLOC_CTX *mem_ctx,
+				    struct ldb_message **msg)
+{
+	const char * attrs[] = {
+		"lastLogon", "lastLogoff", "pwdLastSet", "accountExpires",
+		"sAMAccountName", "displayName", "homeDirectory",
+		"homeDrive", "scriptPath", "profilePath", "description",
+		"userWorkstations", "comment", "userParameters", "objectSid",
+		"primaryGroupID", "userAccountControl", "logonHours",
+		"badPwdCount", "logonCount", "countryCode", "codePage",
+		"unicodePwd", "dBCSPwd", NULL };
+
+	int rc = dsdb_search_one(state->ldb, mem_ctx, msg, NULL, LDB_SCOPE_SUBTREE, attrs, 0, "%s", filter); 
+	if (rc != LDB_SUCCESS) {
+		DEBUG(10, ("ldap_search failed %s\n",
+			   ldb_errstring(state->ldb)));
+		return NT_STATUS_LDAP(rc);
+	}
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_getsampwfilter(struct pdb_methods *m,
+					  struct pdb_samba4_state *state,
+					  struct samu *sam_acct,
+					  const char *exp_fmt, ...) _PRINTF_ATTRIBUTE(4, 5)
+{
+	struct ldb_message *priv;
+	NTSTATUS status;
+	va_list ap;
+	char *expression = NULL;
+	TALLOC_CTX *tmp_ctx = talloc_new(state);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	va_start(ap, exp_fmt);
+	expression = talloc_vasprintf(tmp_ctx, exp_fmt, ap);
+	va_end(ap);
+	
+	if (!expression) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	status = pdb_samba4_getsamupriv(state, expression, sam_acct, &priv);
+	talloc_free(tmp_ctx);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(10, ("pdb_samba4_getsamupriv failed: %s\n",
+			   nt_errstr(status)));
+		return status;
+	}
+
+	status = pdb_samba4_init_sam_from_priv(m, sam_acct, priv);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(10, ("pdb_samba4_init_sam_from_priv failed: %s\n",
+			   nt_errstr(status)));
+		TALLOC_FREE(priv);
+		return status;
+	}
+
+	pdb_set_backend_private_data(sam_acct, priv, NULL, m, PDB_SET);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_getsampwnam(struct pdb_methods *m,
+				    struct samu *sam_acct,
+				    const char *username)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+
+	return pdb_samba4_getsampwfilter(m, state, sam_acct, 
+					 "(&(samaccountname=%s)(objectclass=user))",
+					 username);
+}
+
+static NTSTATUS pdb_samba4_getsampwsid(struct pdb_methods *m,
+				    struct samu *sam_acct,
+				    const struct dom_sid *sid)
+{
+	NTSTATUS status;
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	char *sidstr;
+
+	sidstr = dom_sid_string(talloc_tos(), sid);
+	NT_STATUS_HAVE_NO_MEMORY(sidstr);
+
+	status = pdb_samba4_getsampwfilter(m, state, sam_acct,  
+					   "(&(objectsid=%s)(objectclass=user))", 
+					   sidstr);
+	talloc_free(sidstr);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_create_user(struct pdb_methods *m,
+				    TALLOC_CTX *mem_ctx,
+				    const char *name, uint32 acct_flags,
+				    uint32 *rid)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct dom_sid *sid;
+	struct ldb_dn *dn;
+	NTSTATUS status;
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	/* Internally this uses transactions to ensure all the steps
+	 * happen or fail as one */
+	status = dsdb_add_user(state->ldb, tmp_ctx, name, acct_flags, &sid, &dn);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		return status;
+	}
+	sid_peek_rid(sid, rid);
+	talloc_free(tmp_ctx);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_delete_user(struct pdb_methods *m,
+				       TALLOC_CTX *mem_ctx,
+				       struct samu *sam)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct ldb_dn *dn;
+	int rc;
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	dn = ldb_dn_new_fmt(tmp_ctx, state->ldb, "<SID=%s>", dom_sid_string(tmp_ctx, pdb_get_user_sid(sam)));
+	if (!dn || !ldb_dn_validate(dn)) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+	rc = ldb_delete(state->ldb, dn);
+
+	if (rc != LDB_SUCCESS) {
+		DEBUG(10, ("ldb_delete for %s failed: %s\n", ldb_dn_get_linearized(dn),
+			   ldb_errstring(state->ldb)));
+		talloc_free(tmp_ctx);
+		return NT_STATUS_LDAP(rc);
+	}
+	talloc_free(tmp_ctx);
+	return NT_STATUS_OK;
+}
+
+/* This interface takes a fully populated struct samu and places it in
+ * the database.  This is not implemented at this time as we need to
+ * be careful around the creation of arbitary SIDs (ie, we must ensrue
+ * they are not left in a RID pool */
+static NTSTATUS pdb_samba4_add_sam_account(struct pdb_methods *m,
+					struct samu *sampass)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+/*
+ * Update the Samba4 LDB with the changes from a struct samu.
+ *
+ * This takes care not to update elements that have not been changed
+ * by the caller
+ */
+static NTSTATUS pdb_samba4_update_sam_account(struct pdb_methods *m,
+					   struct samu *sam)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct ldb_message *msg = pdb_samba4_get_samu_private(
+		m, sam);
+	struct ldb_message *replace_msg;
+	int rc;
+
+	if (!pdb_samba4_init_samba4_from_sam(state, msg, talloc_tos(),
+					     &replace_msg, sam)) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	if (replace_msg->num_elements == 0) {
+		/* Nothing to do, just return success */
+		return NT_STATUS_OK;
+	}
+
+	rc = dsdb_replace(state->ldb, replace_msg, 0);
+	TALLOC_FREE(replace_msg);
+	if (rc != LDB_SUCCESS) {
+		DEBUG(10, ("dsdb_replace for %s failed: %s\n", ldb_dn_get_linearized(replace_msg->dn),
+			   ldb_errstring(state->ldb)));
+		return NT_STATUS_LDAP(rc);
+	}
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_delete_sam_account(struct pdb_methods *m,
+					   struct samu *username)
+{
+	NTSTATUS status;
+	TALLOC_CTX *tmp_ctx = talloc_new(NULL);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+	status = pdb_samba4_delete_user(m, tmp_ctx, username);
+	talloc_free(tmp_ctx);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_rename_sam_account(struct pdb_methods *m,
+					   struct samu *oldname,
+					   const char *newname)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+/* This is not implemented, as this module is exptected to be used
+ * with auth_samba4, and this is responible for login counters etc
+ *
+ */
+static NTSTATUS pdb_samba4_update_login_attempts(struct pdb_methods *m,
+					      struct samu *sam_acct,
+					      bool success)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS pdb_samba4_getgrfilter(struct pdb_methods *m, GROUP_MAP *map,
+				    const char *exp_fmt, ...) _PRINTF_ATTRIBUTE(4, 5)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	const char *attrs[] = { "objectSid", "description", "samAccountName",
+				NULL };
+	struct ldb_message *msg;
+	va_list ap;
+	char *expression = NULL;
+	struct dom_sid *sid;
+	const char *str;
+	int rc;
+	union unid_t id;
+	TALLOC_CTX *tmp_ctx = talloc_stackframe();
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+	
+	va_start(ap, exp_fmt);
+	expression = talloc_vasprintf(tmp_ctx, exp_fmt, ap);
+	va_end(ap);
+	
+	if (!expression) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	rc = dsdb_search_one(state->ldb, tmp_ctx, &msg, NULL, LDB_SCOPE_SUBTREE, attrs, 0, "%s", expression);
+	if (rc == LDB_ERR_NO_SUCH_OBJECT) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_SUCH_GROUP;
+	} else if (rc != LDB_SUCCESS) {
+		talloc_free(tmp_ctx);
+		DEBUG(10, ("dsdb_search_one failed %s\n",
+			   ldb_errstring(state->ldb)));
+		return NT_STATUS_LDAP(rc);
+	}
+
+	sid = samdb_result_dom_sid(tmp_ctx, msg, "objectSid");
+	if (!sid) {
+		talloc_free(tmp_ctx);
+		DEBUG(10, ("Could not pull SID\n"));
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+	
+	map->sid = *sid;
+	
+	if (!pdb_samba4_sid_to_id(m, sid, &id, &map->sid_name_use)) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_SUCH_GROUP;
+	}
+	if (map->sid_name_use == SID_NAME_USER) {
+		DEBUG(1, (__location__ "Got SID_NAME_USER when searching for a group with %s", expression));
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+	map->gid = id.gid;
+
+	str = ldb_msg_find_attr_as_string(msg, "samAccountName",
+					  NULL);
+	if (str == NULL) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+	fstrcpy(map->nt_name, str);
+
+	str = ldb_msg_find_attr_as_string(msg, "description",
+					    NULL);
+	if (str != NULL) {
+		fstrcpy(map->comment, str);
+	} else {
+		map->comment[0] = '\0';
+	}
+
+	talloc_free(tmp_ctx);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_getgrsid(struct pdb_methods *m, GROUP_MAP *map,
+				 struct dom_sid sid)
+{
+	char *filter;
+	NTSTATUS status;
+
+	filter = talloc_asprintf(talloc_tos(),
+				 "(&(objectsid=%s)(objectclass=group))",
+				 sid_string_talloc(talloc_tos(), &sid));
+	if (filter == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	status = pdb_samba4_getgrfilter(m, map, filter);
+	TALLOC_FREE(filter);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_getgrgid(struct pdb_methods *m, GROUP_MAP *map,
+				 gid_t gid)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	NTSTATUS status;
+	struct id_map id_map;
+	struct id_map *id_maps[2];
+	TALLOC_CTX *tmp_ctx = talloc_stackframe();
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	id_map.xid.id = gid;
+	id_map.xid.type = ID_TYPE_GID;
+	id_maps[0] = &id_map;
+	id_maps[1] = NULL;
+
+	status = idmap_xids_to_sids(state->idmap_ctx, tmp_ctx, id_maps);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+	status = pdb_samba4_getgrsid(m, map, *id_map.sid);
+	talloc_free(tmp_ctx);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_getgrnam(struct pdb_methods *m, GROUP_MAP *map,
+				 const char *name)
+{
+	char *filter;
+	NTSTATUS status;
+
+	filter = talloc_asprintf(talloc_tos(),
+				 "(&(samaccountname=%s)(objectclass=group))",
+				 name);
+	if (filter == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	status = pdb_samba4_getgrfilter(m, map, filter);
+	TALLOC_FREE(filter);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_create_dom_group(struct pdb_methods *m,
+					 TALLOC_CTX *mem_ctx, const char *name,
+					 uint32 *rid)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	NTSTATUS status;
+	struct dom_sid *sid;
+	struct ldb_dn *dn;
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	status = dsdb_add_domain_group(state->ldb, tmp_ctx, name, &sid, &dn);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		return status;
+	}
+
+	sid_peek_rid(sid, rid);
+	talloc_free(tmp_ctx);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_delete_dom_group(struct pdb_methods *m,
+					 TALLOC_CTX *mem_ctx, uint32 rid)
+{
+	const char *attrs[] = { NULL };
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct dom_sid sid;
+	struct ldb_message *msg;
+	struct ldb_dn *dn;
+	int rc;
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	sid_compose(&sid, samdb_domain_sid(state->ldb), rid);
+	
+	if (ldb_transaction_start(state->ldb) != LDB_SUCCESS) {
+		DEBUG(0, ("Unable to start transaction in pdb_samba4_delete_dom_group()\n"));
+		return NT_STATUS_INTERNAL_ERROR;
+	}
+
+	dn = ldb_dn_new_fmt(tmp_ctx, state->ldb, "<SID=%s>", dom_sid_string(tmp_ctx, &sid));
+	if (!dn || !ldb_dn_validate(dn)) {
+		talloc_free(tmp_ctx);
+		ldb_transaction_cancel(state->ldb);
+		return NT_STATUS_NO_MEMORY;
+	}
+	rc = dsdb_search_one(state->ldb, tmp_ctx, &msg, dn, LDB_SCOPE_BASE, attrs, 0, "objectclass=group");
+	if (rc == LDB_ERR_NO_SUCH_OBJECT) {
+		talloc_free(tmp_ctx);
+		ldb_transaction_cancel(state->ldb);
+		return NT_STATUS_NO_SUCH_GROUP;
+	}
+	rc = ldb_delete(state->ldb, dn);
+	if (rc == LDB_ERR_NO_SUCH_OBJECT) {
+		talloc_free(tmp_ctx);
+		ldb_transaction_cancel(state->ldb);
+		return NT_STATUS_NO_SUCH_GROUP;
+	} else if (rc != LDB_SUCCESS) {
+		DEBUG(10, ("ldb_delete failed %s\n",
+			   ldb_errstring(state->ldb)));
+		ldb_transaction_cancel(state->ldb);
+		return NT_STATUS_LDAP(rc);
+	}
+
+	if (ldb_transaction_commit(state->ldb) != LDB_SUCCESS) {
+		DEBUG(0, ("Unable to commit transaction in pdb_samba4_delete_dom_group()\n"));
+		return NT_STATUS_INTERNAL_ERROR;
+	}
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_add_group_mapping_entry(struct pdb_methods *m,
+						GROUP_MAP *map)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS pdb_samba4_update_group_mapping_entry(struct pdb_methods *m,
+						   GROUP_MAP *map)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS pdb_samba4_delete_group_mapping_entry(struct pdb_methods *m,
+						   struct dom_sid sid)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS pdb_samba4_enum_group_mapping(struct pdb_methods *m,
+					   const struct dom_sid *sid,
+					   enum lsa_SidType sid_name_use,
+					   GROUP_MAP **pp_rmap,
+					   size_t *p_num_entries,
+					   bool unix_only)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS pdb_samba4_enum_group_members(struct pdb_methods *m,
+					   TALLOC_CTX *mem_ctx,
+					   const struct dom_sid *group,
+					   uint32_t **pmembers,
+					   size_t *pnum_members)
+{
+	unsigned int i, num_sids, num_members;
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct dom_sid *members_as_sids;
+	struct dom_sid *dom_sid;
+	uint32_t *members;
+	struct ldb_dn *dn;
+	NTSTATUS status;
+
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	dn = ldb_dn_new_fmt(tmp_ctx, state->ldb, "<SID=%s>", dom_sid_string(tmp_ctx, group));
+	if (!dn || !ldb_dn_validate(dn)) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	status = dsdb_enum_group_mem(state->ldb, tmp_ctx, dn, &members_as_sids, &num_sids);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		return status;
+	}
+	status = dom_sid_split_rid(tmp_ctx, group, &dom_sid, NULL);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		return status;
+	}
+
+	*pmembers = members = talloc_array(mem_ctx, uint32_t, num_sids);
+	NT_STATUS_HAVE_NO_MEMORY_AND_FREE(*pmembers, tmp_ctx);
+	num_members = 0;
+
+	for (i = 0; i < num_sids; i++) {
+		if (!dom_sid_in_domain(dom_sid, &members_as_sids[i])) {
+			continue;
+		}
+		status = dom_sid_split_rid(NULL, &members_as_sids[i], 
+					   NULL, &members[num_members]);
+		if (!NT_STATUS_IS_OK(status)) {
+			talloc_free(tmp_ctx);
+			return status;
+		}
+		num_members++;
+	}
+	*pnum_members = num_members;
+	return NT_STATUS_OK;
+}
+
+/* Just convert the primary group SID into a group */
+static NTSTATUS fake_enum_group_memberships(struct pdb_samba4_state *state,
+					    TALLOC_CTX *mem_ctx,
+					    struct samu *user,
+					    struct dom_sid **pp_sids,
+					    gid_t **pp_gids,
+					    uint32_t *p_num_groups)
+{
+	NTSTATUS status;
+	size_t num_groups = 0;
+	struct dom_sid *group_sids;
+	gid_t *gids;
+	TALLOC_CTX *tmp_ctx;
+	
+	tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	if (user->group_sid) {
+		struct id_map *id_maps[2];
+		struct id_map id_map;
+
+		num_groups = 1;
+
+		group_sids = talloc_array(tmp_ctx, struct dom_sid, num_groups);
+		if (group_sids == NULL) {
+			talloc_free(tmp_ctx);
+			return NT_STATUS_NO_MEMORY;
+		}
+		gids = talloc_array(tmp_ctx, gid_t, num_groups);
+		if (gids == NULL) {
+			talloc_free(tmp_ctx);
+			return NT_STATUS_NO_MEMORY;
+		}
+
+		group_sids[0] = *user->group_sid;
+
+		ZERO_STRUCT(id_map);
+		id_map.sid = &group_sids[0];
+		id_maps[0] = &id_map;
+		id_maps[1] = NULL;
+		
+		status = idmap_sids_to_xids(state->idmap_ctx, tmp_ctx, id_maps);
+		if (!NT_STATUS_IS_OK(status)) {
+			talloc_free(tmp_ctx);
+			return status;
+		}
+		if (id_map.xid.type == ID_TYPE_GID || id_map.xid.type == ID_TYPE_BOTH) {
+			gids[0] = id_map.xid.id;
+		} else {
+			DEBUG(1, (__location__ 
+				  "Group %s, of which %s is a member, could not be converted to a GID\n",
+				  dom_sid_string(tmp_ctx, &group_sids[0]),
+				  dom_sid_string(tmp_ctx, &user->user_sid)));
+			talloc_free(tmp_ctx);
+			/* We must error out, otherwise a user might
+			 * avoid a DENY acl based on a group they
+			 * missed out on */
+			return NT_STATUS_NO_SUCH_GROUP;
+		}
+	}
+
+	*pp_sids = talloc_steal(mem_ctx, group_sids);
+	*pp_gids = talloc_steal(mem_ctx, gids);
+	*p_num_groups = num_groups;
+	talloc_free(tmp_ctx);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_enum_group_memberships(struct pdb_methods *m,
+					       TALLOC_CTX *mem_ctx,
+					       struct samu *user,
+					       struct dom_sid **pp_sids,
+					       gid_t **pp_gids,
+					       uint32_t *p_num_groups)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct ldb_message *msg = pdb_samba4_get_samu_private(
+		m, user);
+	const char *attrs[] = { "tokenGroups", NULL};
+	struct ldb_message *tokengroups_msg;
+	struct ldb_message_element *tokengroups;
+	int i, rc;
+	NTSTATUS status;
+	unsigned int count = 0;
+	size_t num_groups;
+	struct dom_sid *group_sids;
+	gid_t *gids;
+	TALLOC_CTX *tmp_ctx;
+		
+	if (msg == NULL) {
+		/* Fake up some things here */
+		return fake_enum_group_memberships(state, 
+						   mem_ctx, 
+						   user, pp_sids,
+						   pp_gids, p_num_groups);
+	}
+
+	tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	rc = dsdb_search_one(state->ldb, tmp_ctx, &tokengroups_msg, msg->dn, LDB_SCOPE_BASE, attrs, 0, NULL);
+
+	if (rc == LDB_ERR_NO_SUCH_OBJECT) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_SUCH_USER;
+	} else if (rc != LDB_SUCCESS) {
+		DEBUG(10, ("dsdb_search_one failed %s\n",
+			   ldb_errstring(state->ldb)));
+		talloc_free(tmp_ctx);
+		return NT_STATUS_LDAP(rc);
+	}
+
+	tokengroups = ldb_msg_find_element(tokengroups_msg, "tokenGroups");
+
+	if (tokengroups) {
+		count = tokengroups->num_values;
+	}
+
+	group_sids = talloc_array(tmp_ctx, struct dom_sid, count);
+	if (group_sids == NULL) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+	gids = talloc_array(tmp_ctx, gid_t, count);
+	if (gids == NULL) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+	num_groups = 0;
+
+	for (i=0; i<count; i++) {
+		struct id_map *id_maps[2];
+		struct id_map id_map;
+		struct ldb_val *v = &tokengroups->values[i];
+		enum ndr_err_code ndr_err
+			= ndr_pull_struct_blob(v, group_sids, &group_sids[num_groups],
+					       (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
+		if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+			talloc_free(tmp_ctx);
+			return NT_STATUS_INTERNAL_DB_CORRUPTION;
+		}
+		
+		ZERO_STRUCT(id_map);
+		id_map.sid = &group_sids[num_groups];
+		id_maps[0] = &id_map;
+		id_maps[1] = NULL;
+
+		status = idmap_sids_to_xids(state->idmap_ctx, tmp_ctx, id_maps);
+		if (!NT_STATUS_IS_OK(status)) {
+			talloc_free(tmp_ctx);
+			return status;
+		}
+		if (id_map.xid.type == ID_TYPE_GID || id_map.xid.type == ID_TYPE_BOTH) {
+			gids[num_groups] = id_map.xid.id;
+		} else {
+			DEBUG(1, (__location__ 
+				  "Group %s, of which %s is a member, could not be converted to a GID\n",
+				  dom_sid_string(tmp_ctx, &group_sids[num_groups]),
+				  ldb_dn_get_linearized(msg->dn)));
+			talloc_free(tmp_ctx);
+			/* We must error out, otherwise a user might
+			 * avoid a DENY acl based on a group they
+			 * missed out on */
+			return NT_STATUS_NO_SUCH_GROUP;
+		}
+
+		num_groups += 1;
+		if (num_groups == count) {
+			break;
+		}
+	}
+
+	*pp_sids = talloc_steal(mem_ctx, group_sids);
+	*pp_gids = talloc_steal(mem_ctx, gids);
+	*p_num_groups = num_groups;
+	talloc_free(tmp_ctx);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_set_unix_primary_group(struct pdb_methods *m,
+					       TALLOC_CTX *mem_ctx,
+					       struct samu *user)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS pdb_samba4_mod_groupmem_by_sid(struct pdb_methods *m,
+					       TALLOC_CTX *mem_ctx,
+					       const struct dom_sid *groupsid, 
+					       const struct dom_sid *membersid,
+					       int mod_op)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct ldb_message *msg;
+	int ret;
+	struct ldb_message_element *el;
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+	msg = ldb_msg_new(tmp_ctx);
+	NT_STATUS_HAVE_NO_MEMORY_AND_FREE(msg, tmp_ctx);
+
+	msg->dn = ldb_dn_new_fmt(msg, state->ldb, "<SID=%s>", dom_sid_string(tmp_ctx, groupsid));
+	if (!msg->dn || !ldb_dn_validate(msg->dn)) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+	ret = ldb_msg_add_fmt(msg, "member", "<SID=%s>", dom_sid_string(tmp_ctx, membersid));
+	if (ret != LDB_SUCCESS) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+	el = ldb_msg_find_element(msg, "member");
+	el->flags = mod_op;
+
+	/* No need for transactions here, the ldb auto-transaction
+	 * code will handle things for the single operation */
+	ret = ldb_modify(state->ldb, msg);
+	talloc_free(tmp_ctx);
+	if (ret != LDB_SUCCESS) {
+		DEBUG(10, ("ldb_modify failed: %s\n",
+			   ldb_errstring(state->ldb)));
+		if (ret == LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS) {
+			return NT_STATUS_MEMBER_IN_GROUP;
+		}
+		if (ret == LDB_ERR_NO_SUCH_ATTRIBUTE) {
+			return NT_STATUS_MEMBER_NOT_IN_GROUP;
+		}
+		return NT_STATUS_LDAP(ret);
+	}
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_mod_groupmem(struct pdb_methods *m,
+				     TALLOC_CTX *mem_ctx,
+				     uint32 grouprid, uint32 memberrid,
+				     int mod_op)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	const struct dom_sid *dom_sid, *groupsid, *membersid;
+	NTSTATUS status;
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	dom_sid = samdb_domain_sid(state->ldb);
+
+	groupsid = dom_sid_add_rid(tmp_ctx, dom_sid, grouprid);
+	NT_STATUS_HAVE_NO_MEMORY_AND_FREE(groupsid, tmp_ctx);
+	membersid = dom_sid_add_rid(tmp_ctx, dom_sid, memberrid);
+	NT_STATUS_HAVE_NO_MEMORY_AND_FREE(membersid, tmp_ctx);
+	status = pdb_samba4_mod_groupmem_by_sid(m, tmp_ctx, groupsid, membersid, mod_op);
+	talloc_free(tmp_ctx);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_add_groupmem(struct pdb_methods *m,
+				     TALLOC_CTX *mem_ctx,
+				     uint32 group_rid, uint32 member_rid)
+{
+	return pdb_samba4_mod_groupmem(m, mem_ctx, group_rid, member_rid,
+				    LDB_FLAG_MOD_ADD);
+}
+
+static NTSTATUS pdb_samba4_del_groupmem(struct pdb_methods *m,
+				     TALLOC_CTX *mem_ctx,
+				     uint32 group_rid, uint32 member_rid)
+{
+	return pdb_samba4_mod_groupmem(m, mem_ctx, group_rid, member_rid,
+				       LDB_FLAG_MOD_DELETE);
+}
+
+static NTSTATUS pdb_samba4_create_alias(struct pdb_methods *m,
+				     const char *name, uint32 *rid)
+{
+	TALLOC_CTX *frame = talloc_stackframe();
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct dom_sid *sid;
+
+	struct ldb_dn *dn;
+	NTSTATUS status;
+	
+	/* Internally this uses transactions to ensure all the steps
+	 * happen or fail as one */
+	status = dsdb_add_domain_alias(state->ldb, frame, name, &sid, &dn);
+	if (!NT_STATUS_IS_OK(status)) {
+		TALLOC_FREE(frame);
+	}
+
+	sid_peek_rid(sid, rid);
+	TALLOC_FREE(frame);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_delete_alias(struct pdb_methods *m,
+				     const struct dom_sid *sid)
+{
+	const char *attrs[] = { NULL };
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct ldb_message *msg;
+	struct ldb_dn *dn;
+	int rc;
+	TALLOC_CTX *tmp_ctx = talloc_stackframe();
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	dn = ldb_dn_new_fmt(tmp_ctx, state->ldb, "<SID=%s>", dom_sid_string(tmp_ctx, sid));
+	if (!dn || !ldb_dn_validate(dn)) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	if (ldb_transaction_start(state->ldb) != LDB_SUCCESS) {
+		DEBUG(0, ("Failed to start transaction in dsdb_add_domain_alias(): %s\n", ldb_errstring(state->ldb)));
+		return NT_STATUS_INTERNAL_ERROR;
+	}
+
+	rc = dsdb_search_one(state->ldb, tmp_ctx, &msg, dn, LDB_SCOPE_BASE, attrs, 0, "(objectclass=group)"
+			     "(|(grouptype=%d)(grouptype=%d)))",
+			     GTYPE_SECURITY_BUILTIN_LOCAL_GROUP,
+			     GTYPE_SECURITY_DOMAIN_LOCAL_GROUP);
+	if (rc == LDB_ERR_NO_SUCH_OBJECT) {
+		talloc_free(tmp_ctx);
+		ldb_transaction_cancel(state->ldb);
+		return NT_STATUS_NO_SUCH_ALIAS;
+	}
+	rc = ldb_delete(state->ldb, dn);
+	if (rc == LDB_ERR_NO_SUCH_OBJECT) {
+		talloc_free(tmp_ctx);
+		ldb_transaction_cancel(state->ldb);
+		return NT_STATUS_NO_SUCH_ALIAS;
+	} else if (rc != LDB_SUCCESS) {
+		DEBUG(10, ("ldb_delete failed %s\n",
+			   ldb_errstring(state->ldb)));
+		ldb_transaction_cancel(state->ldb);
+		return NT_STATUS_LDAP(rc);
+	}
+
+	if (ldb_transaction_commit(state->ldb) != LDB_SUCCESS) {
+		DEBUG(0, ("Failed to commit transaction in pdb_samba4_delete_alias(): %s\n",
+			  ldb_errstring(state->ldb)));
+		return NT_STATUS_INTERNAL_ERROR;
+	}
+
+	return NT_STATUS_OK;
+}
+
+#if 0
+static NTSTATUS pdb_samba4_set_aliasinfo(struct pdb_methods *m,
+				      const struct dom_sid *sid,
+				      struct acct_info *info)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct tldap_context *ld;
+	const char *attrs[3] = { "objectSid", "description",
+				 "samAccountName" };
+	struct ldb_message **msg;
+	char *sidstr, *dn;
+	int rc;
+	struct tldap_mod *mods;
+	int num_mods;
+	bool ok;
+
+	ld = pdb_samba4_ld(state);
+	if (ld == NULL) {
+		return NT_STATUS_LDAP(TLDAP_SERVER_DOWN);
+	}
+
+	sidstr = sid_binstring(talloc_tos(), sid);
+	NT_STATUS_HAVE_NO_MEMORY(sidstr);
+
+	rc = pdb_samba4_search_fmt(state, state->domaindn, TLDAP_SCOPE_SUB,
+				attrs, ARRAY_SIZE(attrs), 0, talloc_tos(),
+				&msg, "(&(objectSid=%s)(objectclass=group)"
+				"(|(grouptype=%d)(grouptype=%d)))",
+				sidstr, GTYPE_SECURITY_BUILTIN_LOCAL_GROUP,
+				GTYPE_SECURITY_DOMAIN_LOCAL_GROUP);
+	TALLOC_FREE(sidstr)
+	if (rc != LDB_SUCCESS) {
+		DEBUG(10, ("ldap_search failed %s\n",
+			   ldb_errstring(state->ldb)));
+		return NT_STATUS_LDAP(rc);
+	}
+	switch talloc_array_length(msg) {
+	case 0:
+		return NT_STATUS_NO_SUCH_ALIAS;
+	case 1:
+		break;
+	default:
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+	if (!tldap_entry_dn(msg[0], &dn)) {
+		TALLOC_FREE(msg);
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+	mods = NULL;
+	num_mods = 0;
+	ok = true;
+
+	ok &= tldap_make_mod_fmt(
+		msg[0], msg, &num_mods, &mods, "description",
+		"%s", info->acct_desc);
+	ok &= tldap_make_mod_fmt(
+		msg[0], msg, &num_mods, &mods, "samAccountName",
+		"%s", info->acct_name);
+	if (!ok) {
+		TALLOC_FREE(msg);
+		return NT_STATUS_NO_MEMORY;
+	}
+	if (num_mods == 0) {
+		/* no change */
+		TALLOC_FREE(msg);
+		return NT_STATUS_OK;
+	}
+
+	rc = tldap_modify(ld, dn, num_mods, mods, NULL, 0, NULL, 0);
+	TALLOC_FREE(msg);
+	if (rc != LDB_SUCCESS) {
+		DEBUG(10, ("ldap_modify failed: %s\n",
+			   ldb_errstring(state->ldb)));
+		return NT_STATUS_LDAP(rc);
+	}
+	return NT_STATUS_OK;
+}
+#endif
+static NTSTATUS pdb_samba4_add_aliasmem(struct pdb_methods *m,
+				     const struct dom_sid *alias,
+				     const struct dom_sid *member)
+{
+	NTSTATUS status;
+	TALLOC_CTX *frame = talloc_stackframe();
+	status = pdb_samba4_mod_groupmem_by_sid(m, frame, alias, member, LDB_FLAG_MOD_ADD);
+	talloc_free(frame);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_del_aliasmem(struct pdb_methods *m,
+				     const struct dom_sid *alias,
+				     const struct dom_sid *member)
+{
+	NTSTATUS status;
+	TALLOC_CTX *frame = talloc_stackframe();
+	status = pdb_samba4_mod_groupmem_by_sid(m, frame, alias, member, LDB_FLAG_MOD_DELETE);
+	talloc_free(frame);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_enum_aliasmem(struct pdb_methods *m,
+				      const struct dom_sid *alias,
+				      TALLOC_CTX *mem_ctx,
+				      struct dom_sid **pmembers,
+				      size_t *pnum_members)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct ldb_dn *dn;
+	unsigned int num_members;
+	NTSTATUS status;
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	dn = ldb_dn_new_fmt(tmp_ctx, state->ldb, "<SID=%s>", dom_sid_string(tmp_ctx, alias));
+	if (!dn || !ldb_dn_validate(dn)) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	status = dsdb_enum_group_mem(state->ldb, mem_ctx, dn, pmembers, &num_members);
+	*pnum_members = num_members;
+	if (NT_STATUS_IS_OK(status)) {
+		talloc_steal(mem_ctx, pmembers);
+	}
+	talloc_free(tmp_ctx);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_enum_alias_memberships(struct pdb_methods *m,
+					       TALLOC_CTX *mem_ctx,
+					       const struct dom_sid *domain_sid,
+					       const struct dom_sid *members,
+					       size_t num_members,
+					       uint32_t **palias_rids,
+					       size_t *pnum_alias_rids)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	uint32_t *alias_rids = NULL;
+	size_t num_alias_rids = 0;
+	int i;
+	struct dom_sid *groupSIDs = NULL;
+	unsigned int num_groupSIDs = 0;
+	char *filter;
+	NTSTATUS status;
+	const char *sid_string;
+	const char *sid_dn;
+	DATA_BLOB sid_blob;
+
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+	/*
+	 * TODO: Get the filter right so that we only get the aliases from
+	 * either the SAM or BUILTIN
+	 */
+
+	filter = talloc_asprintf(tmp_ctx, "(&(objectClass=group)(groupType:1.2.840.113556.1.4.803:=%u))",
+				 GROUP_TYPE_BUILTIN_LOCAL_GROUP);
+	if (filter == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	for (i = 0; i < num_members; i++) {
+		sid_string = dom_sid_string(tmp_ctx, &members[i]);
+		NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sid_string, tmp_ctx);
+
+		sid_dn = talloc_asprintf(tmp_ctx, "<SID=%s>", sid_string);
+		NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sid_dn, tmp_ctx);
+		
+		sid_blob = data_blob_string_const(sid_dn);
+		
+		status = dsdb_expand_nested_groups(state->ldb, &sid_blob, true, filter,
+						   tmp_ctx, &groupSIDs, &num_groupSIDs);
+		if (!NT_STATUS_IS_OK(status)) {
+			talloc_free(tmp_ctx);
+			return status;
+		}
+	}
+
+	alias_rids = talloc_array(mem_ctx, uint32_t, num_groupSIDs);
+	if (alias_rids == NULL) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	for (i=0; i<num_groupSIDs; i++) {
+		if (sid_peek_check_rid(domain_sid, &groupSIDs[i],
+				       &alias_rids[num_alias_rids])) {
+			num_alias_rids++;;
+		}
+	}
+
+	*palias_rids = alias_rids;
+	*pnum_alias_rids = num_alias_rids;
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS pdb_samba4_lookup_rids(struct pdb_methods *m,
+				    const struct dom_sid *domain_sid,
+				    int num_rids,
+				    uint32 *rids,
+				    const char **names,
+				    enum lsa_SidType *lsa_attrs)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	NTSTATUS status;
+
+	TALLOC_CTX *tmp_ctx;
+
+	if (num_rids == 0) {
+		return NT_STATUS_NONE_MAPPED;
+	}
+
+	tmp_ctx = talloc_stackframe();
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+	
+	status = dsdb_lookup_rids(state->ldb, tmp_ctx, domain_sid, num_rids, rids, names, lsa_attrs);
+	talloc_free(tmp_ctx);
+	return status;
+}
+
+static NTSTATUS pdb_samba4_lookup_names(struct pdb_methods *m,
+				     const struct dom_sid *domain_sid,
+				     int num_names,
+				     const char **pp_names,
+				     uint32 *rids,
+				     enum lsa_SidType *attrs)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS pdb_samba4_get_account_policy(struct pdb_methods *m,
+					   enum pdb_policy_type type,
+					   uint32_t *value)
+{
+	return account_policy_get(type, value)
+		? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+
+static NTSTATUS pdb_samba4_set_account_policy(struct pdb_methods *m,
+					   enum pdb_policy_type type,
+					   uint32_t value)
+{
+	return account_policy_set(type, value)
+		? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+
+static NTSTATUS pdb_samba4_get_seq_num(struct pdb_methods *m,
+				    time_t *seq_num_out)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	uint64_t seq_num;
+	int ret = ldb_sequence_number(state->ldb, LDB_SEQ_HIGHEST_SEQ, &seq_num);
+	if (ret == LDB_SUCCESS) {
+		*seq_num_out = seq_num;
+		return NT_STATUS_OK;
+	} else {
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+}
+
+struct pdb_samba4_search_state {
+	uint32_t acct_flags;
+	struct samr_displayentry *entries;
+	uint32_t num_entries;
+	ssize_t array_size;
+	uint32_t current;
+};
+
+static bool pdb_samba4_next_entry(struct pdb_search *search,
+			       struct samr_displayentry *entry)
+{
+	struct pdb_samba4_search_state *state = talloc_get_type_abort(
+		search->private_data, struct pdb_samba4_search_state);
+
+	if (state->current == state->num_entries) {
+		return false;
+	}
+
+	entry->idx = state->entries[state->current].idx;
+	entry->rid = state->entries[state->current].rid;
+	entry->acct_flags = state->entries[state->current].acct_flags;
+
+	entry->account_name = talloc_strdup(
+		search, state->entries[state->current].account_name);
+	entry->fullname = talloc_strdup(
+		search, state->entries[state->current].fullname);
+	entry->description = talloc_strdup(
+		search, state->entries[state->current].description);
+
+	state->current += 1;
+	return true;
+}
+
+static void pdb_samba4_search_end(struct pdb_search *search)
+{
+	struct pdb_samba4_search_state *state = talloc_get_type_abort(
+		search->private_data, struct pdb_samba4_search_state);
+	talloc_free(state);
+}
+
+static bool pdb_samba4_search_filter(struct pdb_methods *m,
+				     struct pdb_search *search,
+				     struct pdb_samba4_search_state **pstate,
+				     const char *exp_fmt, ...) _PRINTF_ATTRIBUTE(4, 5)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct pdb_samba4_search_state *sstate;
+	const char * attrs[] = { "objectSid", "sAMAccountName", "displayName",
+				 "userAccountControl", "description", NULL };
+	struct ldb_result *res;
+	int i, rc, num_users;
+
+	va_list ap;
+	char *expression = NULL;
+
+	TALLOC_CTX *tmp_ctx = talloc_stackframe();
+	if (!tmp_ctx) {
+		return false;
+	}
+
+	va_start(ap, exp_fmt);
+	expression = talloc_vasprintf(tmp_ctx, exp_fmt, ap);
+	va_end(ap);
+	
+	if (!expression) {
+		talloc_free(tmp_ctx);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	sstate = talloc_zero(tmp_ctx, struct pdb_samba4_search_state);
+	if (sstate == NULL) {
+		talloc_free(tmp_ctx);
+		return false;
+	}
+
+	rc = dsdb_search(state->ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE, attrs, 0, "%s", expression);
+	if (rc != LDB_SUCCESS) {
+		talloc_free(tmp_ctx);
+		DEBUG(10, ("dsdb_search failed: %s\n",
+			   ldb_errstring(state->ldb)));
+		return false;
+	}
+
+	num_users = res->count;
+
+	sstate->entries = talloc_array(sstate, struct samr_displayentry,
+				       num_users);
+	if (sstate->entries == NULL) {
+		talloc_free(tmp_ctx);
+		DEBUG(10, ("talloc failed\n"));
+		return false;
+	}
+
+	sstate->num_entries = 0;
+
+	for (i=0; i<num_users; i++) {
+		struct samr_displayentry *e;
+		struct dom_sid *sid;
+
+		e = &sstate->entries[sstate->num_entries];
+
+		e->idx = sstate->num_entries;
+		sid = samdb_result_dom_sid(tmp_ctx, res->msgs[i], "objectSid");
+		if (!sid) {
+			talloc_free(tmp_ctx);
+			DEBUG(10, ("Could not pull SID\n"));
+			return false;
+		}
+		sid_peek_rid(sid, &e->rid);
+	
+		e->acct_flags = samdb_result_acct_flags(state->ldb, tmp_ctx,
+							res->msgs[i], 
+							ldb_get_default_basedn(state->ldb));
+		e->account_name = ldb_msg_find_attr_as_string(
+			res->msgs[i], "samAccountName", NULL);
+		if (e->account_name == NULL) {
+			talloc_free(tmp_ctx);
+			return false;
+		}
+		e->fullname = ldb_msg_find_attr_as_string(
+                        res->msgs[i], "displayName", "");
+		e->description = ldb_msg_find_attr_as_string(
+                        res->msgs[i], "description", "");
+
+		sstate->num_entries += 1;
+		if (sstate->num_entries >= num_users) {
+			break;
+		}
+	}
+	talloc_steal(sstate->entries, res->msgs);
+	search->private_data = talloc_steal(search, sstate);
+	search->next_entry = pdb_samba4_next_entry;
+	search->search_end = pdb_samba4_search_end;
+	*pstate = sstate;
+	talloc_free(tmp_ctx);
+	return true;
+}
+
+static bool pdb_samba4_search_users(struct pdb_methods *m,
+				 struct pdb_search *search,
+				 uint32 acct_flags)
+{
+	struct pdb_samba4_search_state *sstate;
+	bool ret;
+
+	ret = pdb_samba4_search_filter(m, search, &sstate, "(objectclass=user)");
+	if (!ret) {
+		return false;
+	}
+	sstate->acct_flags = acct_flags;
+	return true;
+}
+
+static bool pdb_samba4_search_groups(struct pdb_methods *m,
+				  struct pdb_search *search)
+{
+	struct pdb_samba4_search_state *sstate;
+	bool ret;
+
+	ret = pdb_samba4_search_filter(m, search, &sstate, 
+				       "(&(grouptype=%d)(objectclass=group))",
+				       GTYPE_SECURITY_GLOBAL_GROUP);
+	if (!ret) {
+		return false;
+	}
+	sstate->acct_flags = 0;
+	return true;
+}
+
+static bool pdb_samba4_search_aliases(struct pdb_methods *m,
+				   struct pdb_search *search,
+				   const struct dom_sid *sid)
+{
+	struct pdb_samba4_search_state *sstate;
+	bool ret;
+
+	ret = pdb_samba4_search_filter(m, search, &sstate, 
+				       "(&(grouptype=%d)(objectclass=group))",
+				       sid_check_is_builtin(sid)
+				       ? GTYPE_SECURITY_BUILTIN_LOCAL_GROUP
+				       : GTYPE_SECURITY_DOMAIN_LOCAL_GROUP);
+	if (!ret) {
+		return false;
+	}
+	sstate->acct_flags = 0;
+	return true;
+}
+
+static bool pdb_samba4_uid_to_sid(struct pdb_methods *m, uid_t uid,
+			       struct dom_sid *sid)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	NTSTATUS status;
+	struct id_map id_map;
+	struct id_map *id_maps[2];
+	TALLOC_CTX *tmp_ctx = talloc_stackframe();
+	if (!tmp_ctx) {
+		return false;
+	}
+
+	id_map.xid.id = uid;
+	id_map.xid.type = ID_TYPE_UID;
+	id_maps[0] = &id_map;
+	id_maps[1] = NULL;
+
+	status = idmap_xids_to_sids(state->idmap_ctx, tmp_ctx, id_maps);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		return false;
+	}
+	*sid = *id_map.sid;
+	talloc_free(tmp_ctx);
+	return true;
+}
+
+static bool pdb_samba4_gid_to_sid(struct pdb_methods *m, gid_t gid,
+			       struct dom_sid *sid)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	NTSTATUS status;
+	struct id_map id_map;
+	struct id_map *id_maps[2];
+	TALLOC_CTX *tmp_ctx = talloc_stackframe();
+	if (!tmp_ctx) {
+		return false;
+	}
+
+	id_map.xid.id = gid;
+	id_map.xid.type = ID_TYPE_GID;
+	id_maps[0] = &id_map;
+	id_maps[1] = NULL;
+
+	status = idmap_xids_to_sids(state->idmap_ctx, tmp_ctx, id_maps);
+	if (!NT_STATUS_IS_OK(status)) {
+		return false;
+	}
+	*sid = *id_map.sid;
+	talloc_free(tmp_ctx);
+	return true;
+}
+
+static bool pdb_samba4_sid_to_id(struct pdb_methods *m, const struct dom_sid *sid,
+				 union unid_t *id, enum lsa_SidType *type)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		m->private_data, struct pdb_samba4_state);
+	struct id_map id_map;
+	struct id_map *id_maps[2];
+	const char *attrs[] = { "objectClass", "groupType", NULL };
+	struct ldb_message *msg;
+	struct ldb_dn *dn;
+	NTSTATUS status;
+	int rc;
+	TALLOC_CTX *tmp_ctx = talloc_stackframe();
+	if (!tmp_ctx) {
+		return false;
+	}
+
+	ZERO_STRUCT(id_map);
+
+	dn = ldb_dn_new_fmt(tmp_ctx, state->ldb, "<SID=%s>", dom_sid_string(tmp_ctx, sid));
+	if (!dn || !ldb_dn_validate(dn)) {
+		talloc_free(tmp_ctx);
+		return false;
+	}
+	rc = dsdb_search_one(state->ldb, tmp_ctx, &msg, dn, LDB_SCOPE_BASE, attrs, 0, NULL);
+	if (rc == LDB_ERR_NO_SUCH_OBJECT) {
+		DEBUG(5, (__location__ "SID to Unix ID lookup failed because SID %s could not be found in the samdb\n", dom_sid_string(tmp_ctx, sid)));
+		talloc_free(tmp_ctx);
+		return false;
+	}
+	if (samdb_find_attribute(state->ldb, msg, "objectClass", "group")) {
+		uint32_t grouptype = ldb_msg_find_attr_as_uint(msg, "groupType", 0);
+		switch (grouptype) {
+		case GTYPE_SECURITY_BUILTIN_LOCAL_GROUP:
+		case GTYPE_SECURITY_DOMAIN_LOCAL_GROUP:
+			*type = SID_NAME_ALIAS;
+			break;
+		case GTYPE_SECURITY_GLOBAL_GROUP:
+			*type = SID_NAME_DOM_GRP;
+			break;
+		default:
+			talloc_free(tmp_ctx);
+			DEBUG(10, ("Could not pull groupType\n"));
+			return false;
+		}
+
+		*type = SID_NAME_DOM_GRP;
+
+		ZERO_STRUCT(id_map);
+		id_map.sid = sid;
+		id_maps[0] = &id_map;
+		id_maps[1] = NULL;
+		
+		status = idmap_sids_to_xids(state->idmap_ctx, tmp_ctx, id_maps);
+		talloc_free(tmp_ctx);
+		if (!NT_STATUS_IS_OK(status)) {
+			return false;
+		}
+		if (id_map.xid.type == ID_TYPE_GID || id_map.xid.type == ID_TYPE_BOTH) {
+			id->gid = id_map.xid.id;
+			return true;
+		}
+		return false;
+	} else if (samdb_find_attribute(state->ldb, msg, "objectClass", "user")) {
+		*type = SID_NAME_USER;
+		ZERO_STRUCT(id_map);
+		id_map.sid = sid;
+		id_maps[0] = &id_map;
+		id_maps[1] = NULL;
+		
+		status = idmap_sids_to_xids(state->idmap_ctx, tmp_ctx, id_maps);
+		talloc_free(tmp_ctx);
+		if (!NT_STATUS_IS_OK(status)) {
+			return false;
+		}
+		if (id_map.xid.type == ID_TYPE_UID || id_map.xid.type == ID_TYPE_BOTH) {
+			id->uid = id_map.xid.id;
+			return true;
+		}
+		return false;
+	}
+	DEBUG(5, (__location__ "SID to Unix ID lookup failed because SID %s was found, but was not a user or group\n", dom_sid_string(tmp_ctx, sid)));
+	talloc_free(tmp_ctx);
+	return false;
+}
+
+static uint32_t pdb_samba4_capabilities(struct pdb_methods *m)
+{
+	return PDB_CAP_STORE_RIDS | PDB_CAP_ADS;
+}
+
+static bool pdb_samba4_new_rid(struct pdb_methods *m, uint32 *rid)
+{
+	return false;
+}
+
+static bool pdb_samba4_get_trusteddom_pw(struct pdb_methods *m,
+				      const char *domain, char** pwd,
+				      struct dom_sid *sid,
+				      time_t *pass_last_set_time)
+{
+	return false;
+}
+
+static bool pdb_samba4_set_trusteddom_pw(struct pdb_methods *m,
+				      const char* domain, const char* pwd,
+				      const struct dom_sid *sid)
+{
+	return false;
+}
+
+static bool pdb_samba4_del_trusteddom_pw(struct pdb_methods *m,
+				      const char *domain)
+{
+	return false;
+}
+
+static NTSTATUS pdb_samba4_enum_trusteddoms(struct pdb_methods *m,
+					 TALLOC_CTX *mem_ctx,
+					 uint32 *num_domains,
+					 struct trustdom_info ***domains)
+{
+	*num_domains = 0;
+	*domains = NULL;
+	return NT_STATUS_OK;
+}
+
+static void pdb_samba4_init_methods(struct pdb_methods *m)
+{
+	m->name = "samba4";
+	m->get_domain_info = pdb_samba4_get_domain_info;
+	m->getsampwnam = pdb_samba4_getsampwnam;
+	m->getsampwsid = pdb_samba4_getsampwsid;
+	m->create_user = pdb_samba4_create_user;
+	m->delete_user = pdb_samba4_delete_user;
+	m->add_sam_account = pdb_samba4_add_sam_account;
+	m->update_sam_account = pdb_samba4_update_sam_account;
+	m->delete_sam_account = pdb_samba4_delete_sam_account;
+	m->rename_sam_account = pdb_samba4_rename_sam_account;
+	m->update_login_attempts = pdb_samba4_update_login_attempts;
+	m->getgrsid = pdb_samba4_getgrsid;
+	m->getgrgid = pdb_samba4_getgrgid;
+	m->getgrnam = pdb_samba4_getgrnam;
+	m->create_dom_group = pdb_samba4_create_dom_group;
+	m->delete_dom_group = pdb_samba4_delete_dom_group;
+	m->add_group_mapping_entry = pdb_samba4_add_group_mapping_entry;
+	m->update_group_mapping_entry = pdb_samba4_update_group_mapping_entry;
+	m->delete_group_mapping_entry =	pdb_samba4_delete_group_mapping_entry;
+	m->enum_group_mapping = pdb_samba4_enum_group_mapping;
+	m->enum_group_members = pdb_samba4_enum_group_members;
+	m->enum_group_memberships = pdb_samba4_enum_group_memberships;
+	m->set_unix_primary_group = pdb_samba4_set_unix_primary_group;
+	m->add_groupmem = pdb_samba4_add_groupmem;
+	m->del_groupmem = pdb_samba4_del_groupmem;
+	m->create_alias = pdb_samba4_create_alias;
+	m->delete_alias = pdb_samba4_delete_alias;
+	m->get_aliasinfo = pdb_default_get_aliasinfo;
+	m->add_aliasmem = pdb_samba4_add_aliasmem;
+	m->del_aliasmem = pdb_samba4_del_aliasmem;
+	m->enum_aliasmem = pdb_samba4_enum_aliasmem;
+	m->enum_alias_memberships = pdb_samba4_enum_alias_memberships;
+	m->lookup_rids = pdb_samba4_lookup_rids;
+	m->lookup_names = pdb_samba4_lookup_names;
+	m->get_account_policy = pdb_samba4_get_account_policy;
+	m->set_account_policy = pdb_samba4_set_account_policy;
+	m->get_seq_num = pdb_samba4_get_seq_num;
+	m->search_users = pdb_samba4_search_users;
+	m->search_groups = pdb_samba4_search_groups;
+	m->search_aliases = pdb_samba4_search_aliases;
+	m->uid_to_sid = pdb_samba4_uid_to_sid;
+	m->gid_to_sid = pdb_samba4_gid_to_sid;
+	m->sid_to_id = pdb_samba4_sid_to_id;
+	m->capabilities = pdb_samba4_capabilities;
+	m->new_rid = pdb_samba4_new_rid;
+	m->get_trusteddom_pw = pdb_samba4_get_trusteddom_pw;
+	m->set_trusteddom_pw = pdb_samba4_set_trusteddom_pw;
+	m->del_trusteddom_pw = pdb_samba4_del_trusteddom_pw;
+	m->enum_trusteddoms = pdb_samba4_enum_trusteddoms;
+}
+
+static void free_private_data(void **vp)
+{
+	struct pdb_samba4_state *state = talloc_get_type_abort(
+		*vp, struct pdb_samba4_state);
+	talloc_unlink(state, state->ldb);
+	return;
+}
+
+static NTSTATUS pdb_init_samba4(struct pdb_methods **pdb_method,
+			     const char *location)
+{
+	struct pdb_methods *m;
+	struct pdb_samba4_state *state;
+	NTSTATUS status;
+	char *config_file;
+
+	if ( !NT_STATUS_IS_OK(status = make_pdb_method( &m )) ) {
+		return status;
+	}
+
+	state = talloc_zero(m, struct pdb_samba4_state);
+	if (state == NULL) {
+		goto nomem;
+	}
+	m->private_data = state;
+	m->free_private_data = free_private_data;
+	pdb_samba4_init_methods(m);
+
+	state->ev = s4_event_context_init(state);
+	if (!state->ev) {
+		DEBUG(10, ("s4_event_context_init failed\n"));
+		goto fail;
+	}
+
+	state->lp_ctx = loadparm_init(state);
+	if (state->lp_ctx == NULL) {
+		DEBUG(10, ("loadparm_init failed\n"));
+		goto fail;
+	}
+
+	if (lp_loaded()) {
+		config_file = lp_configfile();
+	}
+	if (!config_file || !config_file[0]) {
+		config_file = get_dyn_CONFIGFILE();
+	}
+
+	if (!lpcfg_load(state->lp_ctx, config_file)) {
+		DEBUG(1, ("s4 lpcfg_load() of s3 config file %s failed", config_file));
+		goto fail;
+	}
+
+	state->ldb = samdb_connect(state,
+				   state->ev,
+				   state->lp_ctx,
+				   system_session(state->lp_ctx), 0);
+
+	if (!state->ldb) {
+		DEBUG(10, ("samdb_connect failed\n"));
+		goto fail;
+	}
+
+	state->idmap_ctx = idmap_init(state, state->ev,
+				      state->lp_ctx);
+	if (!state->idmap_ctx) {
+		DEBUG(10, ("samdb_connect failed\n"));
+		goto fail;
+	}
+
+	*pdb_method = m;
+	return NT_STATUS_OK;
+nomem:
+	status = NT_STATUS_NO_MEMORY;
+fail:
+	TALLOC_FREE(m);
+	return status;
+}
+
+NTSTATUS pdb_samba4_init(void);
+NTSTATUS pdb_samba4_init(void)
+{
+	return smb_register_passdb(PASSDB_INTERFACE_VERSION, "samba4",
+				   pdb_init_samba4);
+}
diff --git a/source3/passdb/wscript_build b/source3/passdb/wscript_build
index 79b143507f..c741bfad58 100644
--- a/source3/passdb/wscript_build
+++ b/source3/passdb/wscript_build
@@ -46,3 +46,13 @@ bld.SAMBA3_MODULE('pdb_wbc_sam',
                  init_function='',
                  internal_module=bld.SAMBA3_IS_STATIC_MODULE('pdb_wbc_sam'),
                  enabled=bld.SAMBA3_IS_ENABLED_MODULE('pdb_wbc_sam'))
+
+bld.SAMBA3_MODULE('pdb_samba4',
+                  subsystem='pdb',
+                  source='pdb_samba4.c',
+                  init_function='',
+                  deps='IDMAP samdb',
+                  allow_undefined_symbols=False,
+                  internal_module=bld.SAMBA3_IS_STATIC_MODULE('pdb_samba4'),
+                  enabled=bld.SAMBA3_IS_ENABLED_MODULE('pdb_samba4'))
+