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|
/*
ldb database module
Copyright (C) Simo Sorce 2004-2008
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2006
Copyright (C) Andrew Tridgell 2004
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/>.
*/
/*
* Name: ldb
*
* Component: ldb local_password module
*
* Description: correctly update hash values based on changes to userPassword and friends
*
* Author: Andrew Bartlett
*/
#include "includes.h"
#include "ldb_module.h"
#include "dsdb/samdb/samdb.h"
#include "librpc/ndr/libndr.h"
#include "dsdb/samdb/ldb_modules/password_modules.h"
#define PASSWORD_GUID_ATTR "masterGUID"
/* This module maintains a local password database, seperate from the main LDAP server.
This allows the password database to be syncronised in a multi-master
fashion, seperate to the more difficult concerns of the main
database. (With passwords, the last writer always wins)
Each incoming add/modify is split into a remote, and a local request, done in that order.
We maintain a list of attributes that are kept locally - perhaps
this should use the @KLUDGE_ACL list of passwordAttribute
*/
static const char * const password_attrs[] = {
"supplementalCredentials",
"unicodePwd",
"dBCSPwd",
"lmPwdHistory",
"ntPwdHistory",
"msDS-KeyVersionNumber",
"pwdLastSet"
};
/* And we merge them back into search requests when asked to do so */
struct lpdb_reply {
struct lpdb_reply *next;
struct ldb_reply *remote;
struct ldb_dn *local_dn;
};
struct lpdb_context {
struct ldb_module *module;
struct ldb_request *req;
struct ldb_message *local_message;
struct lpdb_reply *list;
struct lpdb_reply *current;
struct ldb_reply *remote_done;
struct ldb_reply *remote;
bool added_objectGUID;
bool added_objectClass;
};
static struct lpdb_context *lpdb_init_context(struct ldb_module *module,
struct ldb_request *req)
{
struct ldb_context *ldb;
struct lpdb_context *ac;
ldb = ldb_module_get_ctx(module);
ac = talloc_zero(req, struct lpdb_context);
if (ac == NULL) {
ldb_set_errstring(ldb, "Out of Memory");
return NULL;
}
ac->module = module;
ac->req = req;
return ac;
}
static int lpdb_local_callback(struct ldb_request *req, struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct lpdb_context *ac;
ac = talloc_get_type(req->context, struct lpdb_context);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
if (ares->type != LDB_REPLY_DONE) {
ldb_set_errstring(ldb, "Unexpected reply type");
talloc_free(ares);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
talloc_free(ares);
return ldb_module_done(ac->req,
ac->remote_done->controls,
ac->remote_done->response,
ac->remote_done->error);
}
/*****************************************************************************
* ADD
****************************************************************************/
static int lpdb_add_callback(struct ldb_request *req,
struct ldb_reply *ares);
static int local_password_add(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct ldb_message *remote_message;
struct ldb_request *remote_req;
struct lpdb_context *ac;
struct GUID objectGUID;
int ret;
unsigned int i;
ldb = ldb_module_get_ctx(module);
ldb_debug(ldb, LDB_DEBUG_TRACE, "local_password_add\n");
if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
return ldb_next_request(module, req);
}
/* If the caller is manipulating the local passwords directly, let them pass */
if (ldb_dn_compare_base(ldb_dn_new(req, ldb, LOCAL_BASE),
req->op.add.message->dn) == 0) {
return ldb_next_request(module, req);
}
for (i=0; i < ARRAY_SIZE(password_attrs); i++) {
if (ldb_msg_find_element(req->op.add.message, password_attrs[i])) {
break;
}
}
/* It didn't match any of our password attributes, go on */
if (i == ARRAY_SIZE(password_attrs)) {
return ldb_next_request(module, req);
}
/* TODO: remove this when userPassword will be in schema */
if (!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "person")) {
ldb_asprintf_errstring(ldb,
"Cannot relocate a password on entry: %s, does not have objectClass 'person'",
ldb_dn_get_linearized(req->op.add.message->dn));
return LDB_ERR_OBJECT_CLASS_VIOLATION;
}
/* From here, we assume we have password attributes to split off */
ac = lpdb_init_context(module, req);
if (!ac) {
return ldb_operr(ldb);
}
remote_message = ldb_msg_copy_shallow(remote_req, req->op.add.message);
if (remote_message == NULL) {
return ldb_operr(ldb);
}
/* Remove any password attributes from the remote message */
for (i=0; i < ARRAY_SIZE(password_attrs); i++) {
ldb_msg_remove_attr(remote_message, password_attrs[i]);
}
/* Find the objectGUID to use as the key */
objectGUID = samdb_result_guid(ac->req->op.add.message, "objectGUID");
ac->local_message = ldb_msg_copy_shallow(ac, req->op.add.message);
if (ac->local_message == NULL) {
return ldb_operr(ldb);
}
/* Remove anything seen in the remote message from the local
* message (leaving only password attributes) */
for (i=0; i < remote_message->num_elements; i++) {
ldb_msg_remove_attr(ac->local_message, remote_message->elements[i].name);
}
/* We must have an objectGUID already, or we don't know where
* to add the password. This may be changed to an 'add and
* search', to allow the directory to create the objectGUID */
if (ldb_msg_find_ldb_val(req->op.add.message, "objectGUID") == NULL) {
ldb_set_errstring(ldb,
"no objectGUID found in search: "
"local_password module must be "
"onfigured below objectGUID module!\n");
return LDB_ERR_CONSTRAINT_VIOLATION;
}
ac->local_message->dn = ldb_dn_new(ac->local_message,
ldb, LOCAL_BASE);
if ((ac->local_message->dn == NULL) ||
( ! ldb_dn_add_child_fmt(ac->local_message->dn,
PASSWORD_GUID_ATTR "=%s",
GUID_string(ac->local_message,
&objectGUID)))) {
return ldb_operr(ldb);
}
ret = ldb_build_add_req(&remote_req, ldb, ac,
remote_message,
req->controls,
ac, lpdb_add_callback,
req);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_next_request(module, remote_req);
}
/* Add a record, splitting password attributes from the user's main
* record */
static int lpdb_add_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct ldb_request *local_req;
struct lpdb_context *ac;
int ret;
ac = talloc_get_type(req->context, struct lpdb_context);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
if (ares->type != LDB_REPLY_DONE) {
ldb_set_errstring(ldb, "Unexpected reply type");
talloc_free(ares);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
ac->remote_done = talloc_steal(ac, ares);
ret = ldb_build_add_req(&local_req, ldb, ac,
ac->local_message,
NULL,
ac, lpdb_local_callback,
ac->req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
ret = ldb_next_request(ac->module, local_req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
return LDB_SUCCESS;
}
/*****************************************************************************
* MODIFY
****************************************************************************/
static int lpdb_modify_callabck(struct ldb_request *req,
struct ldb_reply *ares);
static int lpdb_mod_search_callback(struct ldb_request *req,
struct ldb_reply *ares);
static int local_password_modify(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct lpdb_context *ac;
struct ldb_message *remote_message;
struct ldb_request *remote_req;
int ret;
unsigned int i;
ldb = ldb_module_get_ctx(module);
ldb_debug(ldb, LDB_DEBUG_TRACE, "local_password_modify\n");
if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
return ldb_next_request(module, req);
}
/* If the caller is manipulating the local passwords directly, let them pass */
if (ldb_dn_compare_base(ldb_dn_new(req, ldb, LOCAL_BASE),
req->op.mod.message->dn) == 0) {
return ldb_next_request(module, req);
}
for (i=0; i < ARRAY_SIZE(password_attrs); i++) {
if (ldb_msg_find_element(req->op.add.message, password_attrs[i])) {
break;
}
}
/* It didn't match any of our password attributes, then we have nothing to do here */
if (i == ARRAY_SIZE(password_attrs)) {
return ldb_next_request(module, req);
}
/* From here, we assume we have password attributes to split off */
ac = lpdb_init_context(module, req);
if (!ac) {
return ldb_operr(ldb);
}
remote_message = ldb_msg_copy_shallow(ac, ac->req->op.mod.message);
if (remote_message == NULL) {
return ldb_operr(ldb);
}
/* Remove any password attributes from the remote message */
for (i=0; i < ARRAY_SIZE(password_attrs); i++) {
ldb_msg_remove_attr(remote_message, password_attrs[i]);
}
ac->local_message = ldb_msg_copy_shallow(ac, ac->req->op.mod.message);
if (ac->local_message == NULL) {
return ldb_operr(ldb);
}
/* Remove anything seen in the remote message from the local
* message (leaving only password attributes) */
for (i=0; i < remote_message->num_elements;i++) {
ldb_msg_remove_attr(ac->local_message, remote_message->elements[i].name);
}
ret = ldb_build_mod_req(&remote_req, ldb, ac,
remote_message,
req->controls,
ac, lpdb_modify_callabck,
req);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_next_request(module, remote_req);
}
/* On a modify, we don't have the objectGUID handy, so we need to
* search our DN for it */
static int lpdb_modify_callabck(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
static const char * const attrs[] = { "objectGUID", "objectClass", NULL };
struct ldb_request *search_req;
struct lpdb_context *ac;
int ret;
ac = talloc_get_type(req->context, struct lpdb_context);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
if (ares->type != LDB_REPLY_DONE) {
ldb_set_errstring(ldb, "Unexpected reply type");
talloc_free(ares);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
ac->remote_done = talloc_steal(ac, ares);
/* prepare the search operation */
ret = ldb_build_search_req(&search_req, ldb, ac,
ac->req->op.mod.message->dn, LDB_SCOPE_BASE,
"(objectclass=*)", attrs,
NULL,
ac, lpdb_mod_search_callback,
ac->req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
ret = ldb_next_request(ac->module, search_req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
return LDB_SUCCESS;
}
/* Called when we search for our own entry. Stores the one entry we
* expect (as it is a base search) on the context pointer */
static int lpdb_mod_search_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct ldb_request *local_req;
struct lpdb_context *ac;
struct ldb_dn *local_dn;
struct GUID objectGUID;
int ret = LDB_SUCCESS;
ac = talloc_get_type(req->context, struct lpdb_context);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
switch (ares->type) {
case LDB_REPLY_ENTRY:
if (ac->remote != NULL) {
ldb_set_errstring(ldb, "Too many results");
talloc_free(ares);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
ac->remote = talloc_steal(ac, ares);
break;
case LDB_REPLY_REFERRAL:
/* ignore */
talloc_free(ares);
break;
case LDB_REPLY_DONE:
/* After we find out the objectGUID for the entry, modify the local
* password database as required */
talloc_free(ares);
/* if it is not an entry of type person this is an error */
/* TODO: remove this when sambaPassword will be in schema */
if (ac->remote == NULL) {
ldb_asprintf_errstring(ldb,
"entry just modified (%s) not found!",
ldb_dn_get_linearized(req->op.search.base));
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (!ldb_msg_check_string_attribute(ac->remote->message,
"objectClass", "person")) {
/* Not relevent to us */
return ldb_module_done(ac->req,
ac->remote_done->controls,
ac->remote_done->response,
ac->remote_done->error);
}
if (ldb_msg_find_ldb_val(ac->remote->message,
"objectGUID") == NULL) {
ldb_set_errstring(ldb,
"no objectGUID found in search: "
"local_password module must be "
"configured below objectGUID "
"module!\n");
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OBJECT_CLASS_VIOLATION);
}
objectGUID = samdb_result_guid(ac->remote->message,
"objectGUID");
local_dn = ldb_dn_new(ac, ldb, LOCAL_BASE);
if ((local_dn == NULL) ||
( ! ldb_dn_add_child_fmt(local_dn,
PASSWORD_GUID_ATTR "=%s",
GUID_string(ac, &objectGUID)))) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
ac->local_message->dn = local_dn;
ret = ldb_build_mod_req(&local_req, ldb, ac,
ac->local_message,
NULL,
ac, lpdb_local_callback,
ac->req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
/* perform the local update */
ret = ldb_next_request(ac->module, local_req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
}
return LDB_SUCCESS;
}
/*****************************************************************************
* DELETE
****************************************************************************/
static int lpdb_delete_callabck(struct ldb_request *req,
struct ldb_reply *ares);
static int lpdb_del_search_callback(struct ldb_request *req,
struct ldb_reply *ares);
static int local_password_delete(struct ldb_module *module,
struct ldb_request *req)
{
struct ldb_context *ldb;
struct ldb_request *remote_req;
struct lpdb_context *ac;
int ret;
ldb = ldb_module_get_ctx(module);
ldb_debug(ldb, LDB_DEBUG_TRACE, "local_password_delete\n");
/* do not manipulate our control entries */
if (ldb_dn_is_special(req->op.mod.message->dn)) {
return ldb_next_request(module, req);
}
/* If the caller is manipulating the local passwords directly,
* let them pass */
if (ldb_dn_compare_base(ldb_dn_new(req, ldb, LOCAL_BASE),
req->op.del.dn) == 0) {
return ldb_next_request(module, req);
}
/* From here, we assume we have password attributes to split off */
ac = lpdb_init_context(module, req);
if (!ac) {
return ldb_operr(ldb);
}
ret = ldb_build_del_req(&remote_req, ldb, ac,
req->op.del.dn,
req->controls,
ac, lpdb_delete_callabck,
req);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_next_request(module, remote_req);
}
/* On a modify, we don't have the objectGUID handy, so we need to
* search our DN for it */
static int lpdb_delete_callabck(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
static const char * const attrs[] = { "objectGUID", "objectClass", NULL };
struct ldb_request *search_req;
struct lpdb_context *ac;
int ret;
ac = talloc_get_type(req->context, struct lpdb_context);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
if (ares->type != LDB_REPLY_DONE) {
ldb_set_errstring(ldb, "Unexpected reply type");
talloc_free(ares);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
ac->remote_done = talloc_steal(ac, ares);
/* prepare the search operation */
ret = ldb_build_search_req(&search_req, ldb, ac,
ac->req->op.del.dn, LDB_SCOPE_BASE,
"(objectclass=*)", attrs,
NULL,
ac, lpdb_del_search_callback,
ac->req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
ret = ldb_next_request(ac->module, search_req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
return LDB_SUCCESS;
}
/* Called when we search for our own entry. Stores the one entry we
* expect (as it is a base search) on the context pointer */
static int lpdb_del_search_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct ldb_request *local_req;
struct lpdb_context *ac;
struct ldb_dn *local_dn;
struct GUID objectGUID;
int ret = LDB_SUCCESS;
ac = talloc_get_type(req->context, struct lpdb_context);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
switch (ares->type) {
case LDB_REPLY_ENTRY:
if (ac->remote != NULL) {
ldb_set_errstring(ldb, "Too many results");
talloc_free(ares);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
ac->remote = talloc_steal(ac, ares);
break;
case LDB_REPLY_REFERRAL:
/* ignore */
talloc_free(ares);
break;
case LDB_REPLY_DONE:
/* After we find out the objectGUID for the entry, modify the local
* password database as required */
talloc_free(ares);
/* if it is not an entry of type person this is NOT an error */
/* TODO: remove this when sambaPassword will be in schema */
if (ac->remote == NULL) {
return ldb_module_done(ac->req,
ac->remote_done->controls,
ac->remote_done->response,
ac->remote_done->error);
}
if (!ldb_msg_check_string_attribute(ac->remote->message,
"objectClass", "person")) {
/* Not relevent to us */
return ldb_module_done(ac->req,
ac->remote_done->controls,
ac->remote_done->response,
ac->remote_done->error);
}
if (ldb_msg_find_ldb_val(ac->remote->message,
"objectGUID") == NULL) {
ldb_set_errstring(ldb,
"no objectGUID found in search: "
"local_password module must be "
"configured below objectGUID "
"module!\n");
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OBJECT_CLASS_VIOLATION);
}
objectGUID = samdb_result_guid(ac->remote->message,
"objectGUID");
local_dn = ldb_dn_new(ac, ldb, LOCAL_BASE);
if ((local_dn == NULL) ||
( ! ldb_dn_add_child_fmt(local_dn,
PASSWORD_GUID_ATTR "=%s",
GUID_string(ac, &objectGUID)))) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
ret = ldb_build_del_req(&local_req, ldb, ac,
local_dn,
NULL,
ac, lpdb_local_callback,
ac->req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
/* perform the local update */
ret = ldb_next_request(ac->module, local_req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
}
return LDB_SUCCESS;
}
/*****************************************************************************
* SEARCH
****************************************************************************/
static int lpdb_local_search_callback(struct ldb_request *req,
struct ldb_reply *ares);
static int lpdb_local_search(struct lpdb_context *ac)
{
struct ldb_context *ldb;
struct ldb_request *local_req;
int ret;
ldb = ldb_module_get_ctx(ac->module);
ret = ldb_build_search_req(&local_req, ldb, ac,
ac->current->local_dn,
LDB_SCOPE_BASE,
"(objectclass=*)",
ac->req->op.search.attrs,
NULL,
ac, lpdb_local_search_callback,
ac->req);
if (ret != LDB_SUCCESS) {
return ldb_operr(ldb);
}
return ldb_next_request(ac->module, local_req);
}
static int lpdb_local_search_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct lpdb_context *ac;
struct ldb_reply *merge;
struct lpdb_reply *lr;
int ret;
unsigned int i;
ac = talloc_get_type(req->context, struct lpdb_context);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
lr = ac->current;
/* we are interested only in a single reply (base search) */
switch (ares->type) {
case LDB_REPLY_ENTRY:
if (lr->remote == NULL) {
ldb_set_errstring(ldb,
"Too many results for password entry search!");
talloc_free(ares);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
merge = lr->remote;
lr->remote = NULL;
/* steal the local results on the remote results to be
* returned all together */
talloc_steal(merge, ares->message->elements);
/* Make sure never to return the internal key attribute */
ldb_msg_remove_attr(ares->message, PASSWORD_GUID_ATTR);
for (i=0; i < ares->message->num_elements; i++) {
struct ldb_message_element *el;
el = ldb_msg_find_element(merge->message,
ares->message->elements[i].name);
if (!el) {
ret = ldb_msg_add_empty(merge->message,
ares->message->elements[i].name,
0, &el);
if (ret != LDB_SUCCESS) {
talloc_free(ares);
return ldb_module_done(ac->req,
NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
*el = ares->message->elements[i];
}
}
/* free the rest */
talloc_free(ares);
return ldb_module_send_entry(ac->req, merge->message, merge->controls);
case LDB_REPLY_REFERRAL:
/* ignore */
talloc_free(ares);
break;
case LDB_REPLY_DONE:
talloc_free(ares);
/* if this entry was not returned yet, return it now */
if (lr->remote) {
ret = ldb_module_send_entry(ac->req, ac->remote->message, ac->remote->controls);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req,
NULL, NULL, ret);
}
lr->remote = NULL;
}
if (lr->next->remote->type == LDB_REPLY_DONE) {
/* this was the last one */
return ldb_module_done(ac->req,
lr->next->remote->controls,
lr->next->remote->response,
lr->next->remote->error);
} else {
/* next one */
ac->current = lr->next;
talloc_free(lr);
ret = lpdb_local_search(ac);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req,
NULL, NULL, ret);
}
}
}
return LDB_SUCCESS;
}
/* For each entry returned in a remote search, do a local base search,
* based on the objectGUID we asked for as an additional attribute */
static int lpdb_remote_search_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct lpdb_context *ac;
struct ldb_dn *local_dn;
struct GUID objectGUID;
struct lpdb_reply *lr;
int ret;
ac = talloc_get_type(req->context, struct lpdb_context);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
switch (ares->type) {
case LDB_REPLY_ENTRY:
/* No point searching further if it's not a 'person' entry */
if (!ldb_msg_check_string_attribute(ares->message, "objectClass", "person")) {
/* Make sure to remove anything we added */
if (ac->added_objectGUID) {
ldb_msg_remove_attr(ares->message, "objectGUID");
}
if (ac->added_objectClass) {
ldb_msg_remove_attr(ares->message, "objectClass");
}
return ldb_module_send_entry(ac->req, ares->message, ares->controls);
}
if (ldb_msg_find_ldb_val(ares->message, "objectGUID") == NULL) {
ldb_set_errstring(ldb,
"no objectGUID found in search: local_password module must be configured below objectGUID module!\n");
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
objectGUID = samdb_result_guid(ares->message, "objectGUID");
if (ac->added_objectGUID) {
ldb_msg_remove_attr(ares->message, "objectGUID");
}
if (ac->added_objectClass) {
ldb_msg_remove_attr(ares->message, "objectClass");
}
local_dn = ldb_dn_new(ac, ldb, LOCAL_BASE);
if ((local_dn == NULL) ||
(! ldb_dn_add_child_fmt(local_dn,
PASSWORD_GUID_ATTR "=%s",
GUID_string(ac, &objectGUID)))) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
lr = talloc_zero(ac, struct lpdb_reply);
if (lr == NULL) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
lr->local_dn = talloc_steal(lr, local_dn);
lr->remote = talloc_steal(lr, ares);
if (ac->list) {
ac->current->next = lr;
} else {
ac->list = lr;
}
ac->current= lr;
break;
case LDB_REPLY_REFERRAL:
return ldb_module_send_referral(ac->req, ares->referral);
case LDB_REPLY_DONE:
if (ac->list == NULL) {
/* found nothing */
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
lr = talloc_zero(ac, struct lpdb_reply);
if (lr == NULL) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
lr->remote = talloc_steal(lr, ares);
ac->current->next = lr;
/* rewind current and start local searches */
ac->current= ac->list;
ret = lpdb_local_search(ac);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
}
return LDB_SUCCESS;
}
/* Search for passwords and other attributes. The passwords are
* local, but the other attributes are remote, and we need to glue the
* two search spaces back togeather */
static int local_password_search(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct ldb_request *remote_req;
struct lpdb_context *ac;
unsigned int i;
int ret;
const char * const *search_attrs = NULL;
ldb = ldb_module_get_ctx(module);
ldb_debug(ldb, LDB_DEBUG_TRACE, "local_password_search\n");
if (ldb_dn_is_special(req->op.search.base)) { /* do not manipulate our control entries */
return ldb_next_request(module, req);
}
search_attrs = NULL;
/* If the caller is searching for the local passwords directly, let them pass */
if (ldb_dn_compare_base(ldb_dn_new(req, ldb, LOCAL_BASE),
req->op.search.base) == 0) {
return ldb_next_request(module, req);
}
if (req->op.search.attrs && (!ldb_attr_in_list(req->op.search.attrs, "*"))) {
for (i=0; i < ARRAY_SIZE(password_attrs); i++) {
if (ldb_attr_in_list(req->op.search.attrs, password_attrs[i])) {
break;
}
}
/* It didn't match any of our password attributes, go on */
if (i == ARRAY_SIZE(password_attrs)) {
return ldb_next_request(module, req);
}
}
ac = lpdb_init_context(module, req);
if (!ac) {
return ldb_operr(ldb);
}
/* Remote search is for all attributes: if the remote LDAP server has these attributes, then it overrides the local database */
if (req->op.search.attrs && !ldb_attr_in_list(req->op.search.attrs, "*")) {
if (!ldb_attr_in_list(req->op.search.attrs, "objectGUID")) {
search_attrs = ldb_attr_list_copy_add(ac, req->op.search.attrs, "objectGUID");
ac->added_objectGUID = true;
if (!search_attrs) {
return ldb_operr(ldb);
}
} else {
search_attrs = req->op.search.attrs;
}
if (!ldb_attr_in_list(search_attrs, "objectClass")) {
search_attrs = ldb_attr_list_copy_add(ac, search_attrs, "objectClass");
ac->added_objectClass = true;
if (!search_attrs) {
return ldb_operr(ldb);
}
}
} else {
search_attrs = req->op.search.attrs;
}
ret = ldb_build_search_req_ex(&remote_req, ldb, ac,
req->op.search.base,
req->op.search.scope,
req->op.search.tree,
search_attrs,
req->controls,
ac, lpdb_remote_search_callback,
req);
if (ret != LDB_SUCCESS) {
return ret;
}
/* perform the search */
return ldb_next_request(module, remote_req);
}
_PUBLIC_ const struct ldb_module_ops ldb_local_password_module_ops = {
.name = "local_password",
.add = local_password_add,
.modify = local_password_modify,
.del = local_password_delete,
.search = local_password_search
};
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