/*
ldb database library
Copyright (C) Andrew Tridgell 2005
Copyright (C) Simo Sorce 2006-2008
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 .
*/
/*
handle operational attributes
*/
/*
createTimestamp: HIDDEN, searchable, ldaptime, alias for whenCreated
modifyTimestamp: HIDDEN, searchable, ldaptime, alias for whenChanged
for the above two, we do the search as normal, and if
createTimestamp or modifyTimestamp is asked for, then do
additional searches for whenCreated and whenChanged and fill in
the resulting values
we also need to replace these with the whenCreated/whenChanged
equivalent in the search expression trees
whenCreated: not-HIDDEN, CONSTRUCTED, SEARCHABLE
whenChanged: not-HIDDEN, CONSTRUCTED, SEARCHABLE
on init we need to setup attribute handlers for these so
comparisons are done correctly. The resolution is 1 second.
on add we need to add both the above, for current time
on modify we need to change whenChanged
structuralObjectClass: HIDDEN, CONSTRUCTED, not-searchable. always same as objectclass?
for this one we do the search as normal, then if requested ask
for objectclass, change the attribute name, and add it
primaryGroupToken: HIDDEN, CONSTRUCTED, SEARCHABLE
contains the RID of a certain group object
attributeTypes: in schema only
objectClasses: in schema only
matchingRules: in schema only
matchingRuleUse: in schema only
creatorsName: not supported by w2k3?
modifiersName: not supported by w2k3?
*/
#include "includes.h"
#include "ldb_includes.h"
#include "ldb_module.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "param/param.h"
#include "dsdb/samdb/samdb.h"
#include "dsdb/samdb/ldb_modules/util.h"
#include "auth/auth.h"
#include "libcli/security/dom_sid.h"
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
#endif
struct operational_data {
struct ldb_dn *aggregate_dn;
};
/*
construct a canonical name from a message
*/
static int construct_canonical_name(struct ldb_module *module,
struct ldb_message *msg, enum ldb_scope scope)
{
char *canonicalName;
canonicalName = ldb_dn_canonical_string(msg, msg->dn);
if (canonicalName == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
return ldb_msg_add_steal_string(msg, "canonicalName", canonicalName);
}
/*
construct a primary group token for groups from a message
*/
static int construct_primary_group_token(struct ldb_module *module,
struct ldb_message *msg, enum ldb_scope scope)
{
struct ldb_context *ldb;
uint32_t primary_group_token;
ldb = ldb_module_get_ctx(module);
if (ldb_match_msg_objectclass(msg, "group") == 1) {
primary_group_token
= samdb_result_rid_from_sid(msg, msg, "objectSid", 0);
if (primary_group_token == 0) {
return LDB_SUCCESS;
}
return samdb_msg_add_int(ldb, msg, msg, "primaryGroupToken",
primary_group_token);
} else {
return LDB_SUCCESS;
}
}
/*
construct the token groups for SAM objects from a message
*/
static int construct_token_groups(struct ldb_module *module,
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;
int ret;
NTSTATUS status;
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)) {
talloc_free(tmp_ctx);
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
} 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)) {
talloc_free(tmp_ctx);
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
} else if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)) {
/* Not a user, we have no tokenGroups */
talloc_free(tmp_ctx);
return LDB_SUCCESS;
} else if (!NT_STATUS_IS_OK(status)) {
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;
}
status = auth_generate_session_info(tmp_ctx, auth_context, server_info, 0, &session_info);
if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
talloc_free(tmp_ctx);
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
} else if (!NT_STATUS_IS_OK(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) {
talloc_free(tmp_ctx);
return ret;
}
}
return LDB_SUCCESS;
}
/*
construct the parent GUID for an entry from a message
*/
static int construct_parent_guid(struct ldb_module *module,
struct ldb_message *msg, enum ldb_scope scope)
{
struct ldb_result *res;
const struct ldb_val *parent_guid;
const char *attrs[] = { "objectGUID", NULL };
int ret;
struct ldb_val v;
/* TODO: In the future, this needs to honour the partition boundaries */
struct ldb_dn *parent_dn = ldb_dn_get_parent(msg, msg->dn);
if (parent_dn == NULL) {
DEBUG(4,(__location__ ": Failed to find parent for dn %s\n",
ldb_dn_get_linearized(msg->dn)));
return LDB_SUCCESS;
}
ret = dsdb_module_search_dn(module, msg, &res, parent_dn, attrs, DSDB_SEARCH_SHOW_DELETED);
talloc_free(parent_dn);
/* if there is no parentGUID for this object, then return */
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
DEBUG(4,(__location__ ": Parent dn for %s does not exist \n",
ldb_dn_get_linearized(msg->dn)));
return LDB_SUCCESS;
} else if (ret != LDB_SUCCESS) {
return ret;
}
parent_guid = ldb_msg_find_ldb_val(res->msgs[0], "objectGUID");
if (!parent_guid) {
talloc_free(res);
return LDB_SUCCESS;
}
v = data_blob_dup_talloc(res, parent_guid);
if (!v.data) {
talloc_free(res);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_msg_add_steal_value(msg, "parentGUID", &v);
talloc_free(res);
return ret;
}
/*
construct a subSchemaSubEntry
*/
static int construct_subschema_subentry(struct ldb_module *module,
struct ldb_message *msg, enum ldb_scope scope)
{
struct operational_data *data = talloc_get_type(ldb_module_get_private(module), struct operational_data);
char *subSchemaSubEntry;
/* We may be being called before the init function has finished */
if (!data) {
return LDB_SUCCESS;
}
/* Try and set this value up, if possible. Don't worry if it
* fails, we may not have the DB set up yet, and it's not
* really vital anyway */
if (!data->aggregate_dn) {
struct ldb_context *ldb = ldb_module_get_ctx(module);
data->aggregate_dn = samdb_aggregate_schema_dn(ldb, data);
}
if (data->aggregate_dn) {
subSchemaSubEntry = ldb_dn_alloc_linearized(msg, data->aggregate_dn);
return ldb_msg_add_steal_string(msg, "subSchemaSubEntry", subSchemaSubEntry);
}
return LDB_SUCCESS;
}
static int construct_msds_isrodc_with_dn(struct ldb_module *module,
struct ldb_message *msg,
struct ldb_message_element *object_category)
{
struct ldb_context *ldb;
struct ldb_dn *dn;
const struct ldb_val *val;
ldb = ldb_module_get_ctx(module);
if (!ldb) {
DEBUG(4, (__location__ ": Failed to get ldb \n"));
return LDB_ERR_OPERATIONS_ERROR;
}
dn = ldb_dn_new(msg, ldb, (const char *)object_category->values[0].data);
if (!dn) {
DEBUG(4, (__location__ ": Failed to create dn from %s \n",
(const char *)object_category->values[0].data));
return LDB_ERR_OPERATIONS_ERROR;
}
val = ldb_dn_get_rdn_val(dn);
if (!val) {
DEBUG(4, (__location__ ": Failed to get rdn val from %s \n",
ldb_dn_get_linearized(dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
if (strequal((const char *)val->data, "NTDS-DSA")) {
ldb_msg_add_string(msg, "msDS-isRODC", "FALSE");
} else {
ldb_msg_add_string(msg, "msDS-isRODC", "TRUE");
}
return LDB_SUCCESS;
}
static int construct_msds_isrodc_with_server_dn(struct ldb_module *module,
struct ldb_message *msg,
struct ldb_dn *dn)
{
struct ldb_dn *server_dn;
const char *attr_obj_cat[] = { "objectCategory", NULL };
struct ldb_result *res;
struct ldb_message_element *object_category;
int ret;
server_dn = ldb_dn_copy(msg, dn);
if (!ldb_dn_add_child_fmt(server_dn, "CN=NTDS Settings")) {
DEBUG(4, (__location__ ": Failed to add child to %s \n",
ldb_dn_get_linearized(server_dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
ret = dsdb_module_search_dn(module, msg, &res, server_dn, attr_obj_cat, 0);
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
DEBUG(4,(__location__ ": Can't get objectCategory for %s \n",
ldb_dn_get_linearized(server_dn)));
return LDB_SUCCESS;
} else if (ret != LDB_SUCCESS) {
return ret;
}
object_category = ldb_msg_find_element(res->msgs[0], "objectCategory");
if (!object_category) {
DEBUG(4,(__location__ ": Can't find objectCategory for %s \n",
ldb_dn_get_linearized(res->msgs[0]->dn)));
return LDB_SUCCESS;
}
return construct_msds_isrodc_with_dn(module, msg, object_category);
}
static int construct_msds_isrodc_with_computer_dn(struct ldb_module *module,
struct ldb_message *msg)
{
struct ldb_context *ldb;
const char *attr[] = { "serverReferenceBL", NULL };
struct ldb_result *res;
int ret;
struct ldb_dn *server_dn;
ret = dsdb_module_search_dn(module, msg, &res, msg->dn, attr, 0);
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
DEBUG(4,(__location__ ": Can't get serverReferenceBL for %s \n",
ldb_dn_get_linearized(msg->dn)));
return LDB_SUCCESS;
} else if (ret != LDB_SUCCESS) {
return ret;
}
ldb = ldb_module_get_ctx(module);
if (!ldb) {
return LDB_SUCCESS;
}
server_dn = ldb_msg_find_attr_as_dn(ldb, msg, res->msgs[0], "serverReferenceBL");
if (!server_dn) {
DEBUG(4,(__location__ ": Can't find serverReferenceBL for %s \n",
ldb_dn_get_linearized(res->msgs[0]->dn)));
return LDB_SUCCESS;
}
return construct_msds_isrodc_with_server_dn(module, msg, server_dn);
}
/*
construct msDS-isRODC attr
*/
static int construct_msds_isrodc(struct ldb_module *module, struct ldb_message *msg)
{
struct ldb_message_element * object_class;
struct ldb_message_element * object_category;
unsigned int i;
object_class = ldb_msg_find_element(msg, "objectClass");
if (!object_class) {
DEBUG(4,(__location__ ": Can't get objectClass for %s \n",
ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
for (i=0; inum_values; i++) {
if (strequal((const char*)object_class->values[i].data, "nTDSDSA")) {
/* If TO!objectCategory equals the DN of the classSchema object for the nTDSDSA
* object class, then TO!msDS-isRODC is false. Otherwise, TO!msDS-isRODC is true.
*/
object_category = ldb_msg_find_element(msg, "objectCategory");
if (!object_category) {
DEBUG(4,(__location__ ": Can't get objectCategory for %s \n",
ldb_dn_get_linearized(msg->dn)));
return LDB_SUCCESS;
}
return construct_msds_isrodc_with_dn(module, msg, object_category);
}
if (strequal((const char*)object_class->values[i].data, "server")) {
/* Let TN be the nTDSDSA object whose DN is "CN=NTDS Settings," prepended to
* the DN of TO. Apply the previous rule for the "TO is an nTDSDSA object" case,
* substituting TN for TO.
*/
return construct_msds_isrodc_with_server_dn(module, msg, msg->dn);
}
if (strequal((const char*)object_class->values[i].data, "computer")) {
/* Let TS be the server object named by TO!serverReferenceBL. Apply the previous
* rule for the "TO is a server object" case, substituting TS for TO.
*/
return construct_msds_isrodc_with_computer_dn(module, msg);
}
}
return LDB_SUCCESS;
}
/*
construct msDS-keyVersionNumber attr
TODO: Make this based on the 'win2k' DS huristics bit...
*/
static int construct_msds_keyversionnumber(struct ldb_module *module, struct ldb_message *msg)
{
uint32_t i;
enum ndr_err_code ndr_err;
const struct ldb_val *omd_value;
struct replPropertyMetaDataBlob *omd;
struct ldb_context *ldb = ldb_module_get_ctx(module);
omd_value = ldb_msg_find_ldb_val(msg, "replPropertyMetaData");
if (!omd_value) {
/* We can't make up a key version number without meta data */
return LDB_SUCCESS;
}
if (!omd_value) {
return LDB_SUCCESS;
}
omd = talloc(msg, struct replPropertyMetaDataBlob);
if (!omd) {
ldb_module_oom(module);
return LDB_SUCCESS;
}
ndr_err = ndr_pull_struct_blob(omd_value, omd, omd,
(ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(0,(__location__ ": Failed to parse replPropertyMetaData for %s when trying to add msDS-KeyVersionNumber\n",
ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
if (omd->version != 1) {
DEBUG(0,(__location__ ": bad version %u in replPropertyMetaData for %s when trying to add msDS-KeyVersionNumber\n",
omd->version, ldb_dn_get_linearized(msg->dn)));
talloc_free(omd);
return LDB_SUCCESS;
}
for (i=0; ictr.ctr1.count; i++) {
if (omd->ctr.ctr1.array[i].attid == DRSUAPI_ATTRIBUTE_unicodePwd) {
ldb_msg_add_fmt(msg, "msDS-KeyVersionNumber", "%u", omd->ctr.ctr1.array[i].version);
break;
}
}
return LDB_SUCCESS;
}
/*
a list of attribute names that should be substituted in the parse
tree before the search is done
*/
static const struct {
const char *attr;
const char *replace;
} parse_tree_sub[] = {
{ "createTimestamp", "whenCreated" },
{ "modifyTimestamp", "whenChanged" }
};
/*
a list of attribute names that are hidden, but can be searched for
using another (non-hidden) name to produce the correct result
*/
static const struct {
const char *attr;
const char *replace;
const char *extra_attr;
int (*constructor)(struct ldb_module *, struct ldb_message *, enum ldb_scope);
} search_sub[] = {
{ "createTimestamp", "whenCreated", NULL , NULL },
{ "modifyTimestamp", "whenChanged", NULL , NULL },
{ "structuralObjectClass", "objectClass", NULL , NULL },
{ "canonicalName", "distinguishedName", NULL , construct_canonical_name },
{ "primaryGroupToken", "objectClass", "objectSid", construct_primary_group_token },
{ "tokenGroups", "objectClass", NULL, construct_token_groups },
{ "parentGUID", NULL, NULL, construct_parent_guid },
{ "subSchemaSubEntry", NULL, NULL, construct_subschema_subentry },
{ "msDS-isRODC", "objectClass", "objectCategory", construct_msds_isrodc },
{ "msDS-KeyVersionNumber", "replPropertyMetaData", NULL, construct_msds_keyversionnumber }
};
enum op_remove {
OPERATIONAL_REMOVE_ALWAYS, /* remove always */
OPERATIONAL_REMOVE_UNASKED,/* remove if not requested */
OPERATIONAL_SD_FLAGS /* show if SD_FLAGS_OID set, or asked for */
};
/*
a list of attributes that may need to be removed from the
underlying db return
Some of these are attributes that were once stored, but are now calculated
*/
static const struct {
const char *attr;
enum op_remove op;
} operational_remove[] = {
{ "nTSecurityDescriptor", OPERATIONAL_SD_FLAGS },
{ "msDS-KeyVersionNumber", OPERATIONAL_REMOVE_ALWAYS },
{ "parentGUID", OPERATIONAL_REMOVE_ALWAYS },
{ "replPropertyMetaData", OPERATIONAL_REMOVE_UNASKED },
{ "unicodePwd", OPERATIONAL_REMOVE_UNASKED },
{ "dBCSPwd", OPERATIONAL_REMOVE_UNASKED },
{ "ntPwdHistory", OPERATIONAL_REMOVE_UNASKED },
{ "lmPwdHistory", OPERATIONAL_REMOVE_UNASKED },
{ "supplementalCredentials", OPERATIONAL_REMOVE_UNASKED }
};
/*
post process a search result record. For any search_sub[] attributes that were
asked for, we need to call the appropriate copy routine to copy the result
into the message, then remove any attributes that we added to the search but
were not asked for by the user
*/
static int operational_search_post_process(struct ldb_module *module,
struct ldb_message *msg,
enum ldb_scope scope,
const char * const *attrs_from_user,
const char * const *attrs_searched_for,
bool sd_flags_set)
{
struct ldb_context *ldb;
unsigned int i, a = 0;
bool constructed_attributes = false;
ldb = ldb_module_get_ctx(module);
/* removed any attrs that should not be shown to the user */
for (i=0; icontext, struct operational_context);
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:
/* for each record returned post-process to add any derived
attributes that have been asked for */
ret = operational_search_post_process(ac->module,
ares->message,
ac->scope,
ac->attrs,
req->op.search.attrs,
ac->sd_flags_set);
if (ret != 0) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
return ldb_module_send_entry(ac->req, ares->message, ares->controls);
case LDB_REPLY_REFERRAL:
return ldb_module_send_referral(ac->req, ares->referral);
case LDB_REPLY_DONE:
return ldb_module_done(ac->req, ares->controls,
ares->response, LDB_SUCCESS);
}
talloc_free(ares);
return LDB_SUCCESS;
}
static int operational_search(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct operational_context *ac;
struct ldb_request *down_req;
const char **search_attrs = NULL;
unsigned int i, a;
int ret;
/* There are no operational attributes on special DNs */
if (ldb_dn_is_special(req->op.search.base)) {
return ldb_next_request(module, req);
}
ldb = ldb_module_get_ctx(module);
ac = talloc(req, struct operational_context);
if (ac == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
ac->module = module;
ac->req = req;
ac->scope = req->op.search.scope;
ac->attrs = req->op.search.attrs;
/* FIXME: We must copy the tree and keep the original
* unmodified. SSS */
/* replace any attributes in the parse tree that are
searchable, but are stored using a different name in the
backend */
for (i=0;iop.search.tree,
parse_tree_sub[i].attr,
parse_tree_sub[i].replace);
}
/* in the list of attributes we are looking for, rename any
attributes to the alias for any hidden attributes that can
be fetched directly using non-hidden names */
for (a=0;ac->attrs && ac->attrs[a];a++) {
for (i=0;iattrs[a], search_sub[i].attr) == 0 &&
search_sub[i].replace) {
if (search_sub[i].extra_attr) {
const char **search_attrs2;
/* Only adds to the end of the list */
search_attrs2 = ldb_attr_list_copy_add(req, search_attrs
? search_attrs
: ac->attrs,
search_sub[i].extra_attr);
if (search_attrs2 == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* may be NULL, talloc_free() doesn't mind */
talloc_free(search_attrs);
search_attrs = search_attrs2;
}
if (!search_attrs) {
search_attrs = ldb_attr_list_copy(req, ac->attrs);
if (search_attrs == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
}
/* Despite the ldb_attr_list_copy_add, this is safe as that fn only adds to the end */
search_attrs[a] = search_sub[i].replace;
}
}
}
/* remember if the SD_FLAGS_OID was set */
ac->sd_flags_set = (ldb_request_get_control(req, LDB_CONTROL_SD_FLAGS_OID) != NULL);
ret = ldb_build_search_req_ex(&down_req, ldb, ac,
req->op.search.base,
req->op.search.scope,
req->op.search.tree,
/* use new set of attrs if any */
search_attrs == NULL?req->op.search.attrs:search_attrs,
req->controls,
ac, operational_callback,
req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* perform the search */
return ldb_next_request(module, down_req);
}
static int operational_init(struct ldb_module *ctx)
{
struct operational_data *data;
int ret;
auth_init();
ret = ldb_next_init(ctx);
if (ret != LDB_SUCCESS) {
return ret;
}
data = talloc_zero(ctx, struct operational_data);
if (!data) {
ldb_module_oom(ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ldb_module_set_private(ctx, data);
return LDB_SUCCESS;
}
const struct ldb_module_ops ldb_operational_module_ops = {
.name = "operational",
.search = operational_search,
.init_context = operational_init
};