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samba-mirror/source4/dsdb/samdb/ldb_modules/samldb.c
Swen Schillig 3bc973c602 source4: Update all consumers of strtoul_err(), strtoull_err() to new API 
Signed-off-by: Swen Schillig <swen@linux.ibm.com>
Reviewed-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>
2019-06-30 11:32:18 +00:00

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/*
SAM ldb module
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2014
Copyright (C) Simo Sorce 2004-2008
Copyright (C) Matthias Dieter Wallnöfer 2009-2011
Copyright (C) Matthieu Patou 2012
Copyright (C) Catalyst.Net Ltd 2017
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 samldb module
*
* Description: various internal DSDB triggers - most for SAM specific objects
*
* Author: Simo Sorce
*/
#include "includes.h"
#include "libcli/ldap/ldap_ndr.h"
#include "ldb_module.h"
#include "auth/auth.h"
#include "dsdb/samdb/samdb.h"
#include "dsdb/samdb/ldb_modules/util.h"
#include "dsdb/samdb/ldb_modules/ridalloc.h"
#include "libcli/security/security.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "ldb_wrap.h"
#include "param/param.h"
#include "libds/common/flag_mapping.h"
#include "system/network.h"
#include "librpc/gen_ndr/irpc.h"
struct samldb_ctx;
enum samldb_add_type {
SAMLDB_TYPE_USER,
SAMLDB_TYPE_GROUP,
SAMLDB_TYPE_CLASS,
SAMLDB_TYPE_ATTRIBUTE
};
typedef int (*samldb_step_fn_t)(struct samldb_ctx *);
struct samldb_step {
struct samldb_step *next;
samldb_step_fn_t fn;
};
struct samldb_ctx {
struct ldb_module *module;
struct ldb_request *req;
/* used for add operations */
enum samldb_add_type type;
/* the resulting message */
struct ldb_message *msg;
/* used in "samldb_find_for_defaultObjectCategory" */
struct ldb_dn *dn, *res_dn;
/* all the async steps necessary to complete the operation */
struct samldb_step *steps;
struct samldb_step *curstep;
/* If someone set an ares to forward controls and response back to the caller */
struct ldb_reply *ares;
};
static struct samldb_ctx *samldb_ctx_init(struct ldb_module *module,
struct ldb_request *req)
{
struct ldb_context *ldb;
struct samldb_ctx *ac;
ldb = ldb_module_get_ctx(module);
ac = talloc_zero(req, struct samldb_ctx);
if (ac == NULL) {
ldb_oom(ldb);
return NULL;
}
ac->module = module;
ac->req = req;
return ac;
}
static int samldb_add_step(struct samldb_ctx *ac, samldb_step_fn_t fn)
{
struct samldb_step *step, *stepper;
step = talloc_zero(ac, struct samldb_step);
if (step == NULL) {
return ldb_oom(ldb_module_get_ctx(ac->module));
}
step->fn = fn;
if (ac->steps == NULL) {
ac->steps = step;
ac->curstep = step;
} else {
if (ac->curstep == NULL)
return ldb_operr(ldb_module_get_ctx(ac->module));
for (stepper = ac->curstep; stepper->next != NULL;
stepper = stepper->next);
stepper->next = step;
}
return LDB_SUCCESS;
}
static int samldb_first_step(struct samldb_ctx *ac)
{
if (ac->steps == NULL) {
return ldb_operr(ldb_module_get_ctx(ac->module));
}
ac->curstep = ac->steps;
return ac->curstep->fn(ac);
}
static int samldb_next_step(struct samldb_ctx *ac)
{
if (ac->curstep->next) {
ac->curstep = ac->curstep->next;
return ac->curstep->fn(ac);
}
/* We exit the samldb module here. If someone set an "ares" to forward
* controls and response back to the caller, use them. */
if (ac->ares) {
return ldb_module_done(ac->req, ac->ares->controls,
ac->ares->response, LDB_SUCCESS);
} else {
return ldb_module_done(ac->req, NULL, NULL, LDB_SUCCESS);
}
}
static int samldb_unique_attr_check(struct samldb_ctx *ac, const char *attr,
const char *attr_conflict,
struct ldb_dn *base_dn)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
const char * const no_attrs[] = { NULL };
struct ldb_result *res;
const char *enc_str;
struct ldb_message_element *el;
int ret;
el = dsdb_get_single_valued_attr(ac->msg, attr,
ac->req->operation);
if (el == NULL) {
/* we are not affected */
return LDB_SUCCESS;
}
if (el->num_values > 1) {
ldb_asprintf_errstring(ldb,
"samldb: %s has %u values, should be single-valued!",
attr, el->num_values);
return LDB_ERR_CONSTRAINT_VIOLATION;
} else if (el->num_values == 0) {
ldb_asprintf_errstring(ldb,
"samldb: new value for %s not provided for mandatory, single-valued attribute!",
attr);
return LDB_ERR_OBJECT_CLASS_VIOLATION;
}
if (el->values[0].length == 0) {
ldb_asprintf_errstring(ldb,
"samldb: %s is of zero length, should have a value!",
attr);
return LDB_ERR_OBJECT_CLASS_VIOLATION;
}
enc_str = ldb_binary_encode(ac, el->values[0]);
if (enc_str == NULL) {
return ldb_module_oom(ac->module);
}
/* Make sure that attr (eg) "sAMAccountName" is only used once */
if (attr_conflict != NULL) {
ret = dsdb_module_search(ac->module, ac, &res,
base_dn,
LDB_SCOPE_SUBTREE, no_attrs,
DSDB_FLAG_NEXT_MODULE, ac->req,
"(|(%s=%s)(%s=%s))",
attr, enc_str,
attr_conflict, enc_str);
} else {
ret = dsdb_module_search(ac->module, ac, &res,
base_dn,
LDB_SCOPE_SUBTREE, no_attrs,
DSDB_FLAG_NEXT_MODULE, ac->req,
"(%s=%s)", attr, enc_str);
}
if (ret != LDB_SUCCESS) {
return ret;
}
if (res->count > 1) {
return ldb_operr(ldb);
} else if (res->count == 1) {
if (ldb_dn_compare(res->msgs[0]->dn, ac->msg->dn) != 0) {
ldb_asprintf_errstring(ldb,
"samldb: %s '%s' already in use!",
attr, enc_str);
return LDB_ERR_ENTRY_ALREADY_EXISTS;
}
}
talloc_free(res);
return LDB_SUCCESS;
}
static int samldb_sam_accountname_valid_check(struct samldb_ctx *ac)
{
int ret = samldb_unique_attr_check(ac, "samAccountName", NULL,
ldb_get_default_basedn(
ldb_module_get_ctx(ac->module)));
if (ret == LDB_ERR_OBJECT_CLASS_VIOLATION) {
ret = LDB_ERR_CONSTRAINT_VIOLATION;
}
return ret;
}
static int samldb_schema_attributeid_valid_check(struct samldb_ctx *ac)
{
int ret = samldb_unique_attr_check(ac, "attributeID", "governsID",
ldb_get_schema_basedn(
ldb_module_get_ctx(ac->module)));
if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
ret = LDB_ERR_UNWILLING_TO_PERFORM;
}
return ret;
}
static int samldb_schema_governsid_valid_check(struct samldb_ctx *ac)
{
int ret = samldb_unique_attr_check(ac, "governsID", "attributeID",
ldb_get_schema_basedn(
ldb_module_get_ctx(ac->module)));
if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
ret = LDB_ERR_UNWILLING_TO_PERFORM;
}
return ret;
}
static int samldb_schema_ldapdisplayname_valid_check(struct samldb_ctx *ac)
{
int ret = samldb_unique_attr_check(ac, "lDAPDisplayName", NULL,
ldb_get_schema_basedn(
ldb_module_get_ctx(ac->module)));
if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
ret = LDB_ERR_UNWILLING_TO_PERFORM;
}
return ret;
}
static int samldb_check_linkid_used(struct samldb_ctx *ac,
struct dsdb_schema *schema,
struct ldb_dn *schema_dn,
struct ldb_context *ldb,
int32_t linkID,
bool *found)
{
int ret;
struct ldb_result *ldb_res;
if (dsdb_attribute_by_linkID(schema, linkID)) {
*found = true;
return LDB_SUCCESS;
}
ret = dsdb_module_search(ac->module, ac,
&ldb_res,
schema_dn, LDB_SCOPE_ONELEVEL, NULL,
DSDB_FLAG_NEXT_MODULE,
ac->req,
"(linkID=%d)", linkID);
if (ret != LDB_SUCCESS) {
ldb_debug_set(ldb, LDB_DEBUG_ERROR,
__location__": Searching for linkID=%d failed - %s\n",
linkID,
ldb_errstring(ldb));
return ldb_operr(ldb);
}
*found = (ldb_res->count != 0);
talloc_free(ldb_res);
return LDB_SUCCESS;
}
/* Find the next open forward linkID in the schema. */
static int samldb_generate_next_linkid(struct samldb_ctx *ac,
struct dsdb_schema *schema,
int32_t *next_linkID)
{
int ret;
struct ldb_context *ldb;
struct ldb_dn *schema_dn;
bool linkID_used = true;
/*
* Windows starts at about 0xB0000000 in order to stop potential
* collisions with future additions to the schema. We pass this
* around as a signed int sometimes, but this should be sufficient.
*/
*next_linkID = 0x40000000;
ldb = ldb_module_get_ctx(ac->module);
schema_dn = ldb_get_schema_basedn(ldb);
while (linkID_used) {
*next_linkID += 2;
ret = samldb_check_linkid_used(ac, schema,
schema_dn, ldb,
*next_linkID, &linkID_used);
if (ret != LDB_SUCCESS) {
return ret;
}
}
return LDB_SUCCESS;
}
static int samldb_schema_add_handle_linkid(struct samldb_ctx *ac)
{
int ret;
bool ok, found = false;
struct ldb_message_element *el;
const char *enc_str;
const struct dsdb_attribute *attr;
struct ldb_context *ldb;
struct ldb_dn *schema_dn;
struct dsdb_schema *schema;
int32_t new_linkID = 0;
ldb = ldb_module_get_ctx(ac->module);
schema = dsdb_get_schema(ldb, ac);
schema_dn = ldb_get_schema_basedn(ldb);
el = dsdb_get_single_valued_attr(ac->msg, "linkID",
ac->req->operation);
if (el == NULL) {
return LDB_SUCCESS;
}
enc_str = ldb_binary_encode(ac, el->values[0]);
if (enc_str == NULL) {
return ldb_module_oom(ac->module);
}
ok = (strcmp(enc_str, "0") == 0);
if (ok) {
return LDB_SUCCESS;
}
/*
* This OID indicates that the caller wants the linkID
* to be automatically generated. We therefore assign
* it the next open linkID.
*/
ok = (strcmp(enc_str, "1.2.840.113556.1.2.50") == 0);
if (ok) {
ret = samldb_generate_next_linkid(ac, schema, &new_linkID);
if (ret != LDB_SUCCESS) {
return ret;
}
ldb_msg_remove_element(ac->msg, el);
ret = samdb_msg_add_int(ldb, ac->msg, ac->msg, "linkID",
new_linkID);
return ret;
}
/*
* Using either the attributeID or lDAPDisplayName of
* another attribute in the linkID field indicates that
* we should make this the backlink of that attribute.
*/
attr = dsdb_attribute_by_attributeID_oid(schema, enc_str);
if (attr == NULL) {
attr = dsdb_attribute_by_lDAPDisplayName(schema, enc_str);
}
if (attr != NULL) {
/*
* The attribute we're adding this as a backlink of must
* be a forward link.
*/
if (attr->linkID % 2 != 0) {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
new_linkID = attr->linkID + 1;
/* Make sure that this backlink doesn't already exist. */
ret = samldb_check_linkid_used(ac, schema,
schema_dn, ldb,
new_linkID, &found);
if (ret != LDB_SUCCESS) {
return ret;
}
if (found) {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
ldb_msg_remove_element(ac->msg, el);
ret = samdb_msg_add_int(ldb, ac->msg, ac->msg, "linkID",
new_linkID);
return ret;
}
schema_dn = ldb_get_schema_basedn(ldb_module_get_ctx(ac->module));
ret = samldb_unique_attr_check(ac, "linkID", NULL, schema_dn);
if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
return LDB_ERR_UNWILLING_TO_PERFORM;
} else {
return ret;
}
}
static int samldb_check_mapiid_used(struct samldb_ctx *ac,
struct dsdb_schema *schema,
struct ldb_dn *schema_dn,
struct ldb_context *ldb,
int32_t mapiid,
bool *found)
{
int ret;
struct ldb_result *ldb_res;
ret = dsdb_module_search(ac->module, ac,
&ldb_res,
schema_dn, LDB_SCOPE_ONELEVEL, NULL,
DSDB_FLAG_NEXT_MODULE,
ac->req,
"(mAPIID=%d)", mapiid);
if (ret != LDB_SUCCESS) {
ldb_debug_set(ldb, LDB_DEBUG_ERROR,
__location__": Searching for mAPIID=%d failed - %s\n",
mapiid,
ldb_errstring(ldb));
return ldb_operr(ldb);
}
*found = (ldb_res->count != 0);
talloc_free(ldb_res);
return LDB_SUCCESS;
}
static int samldb_generate_next_mapiid(struct samldb_ctx *ac,
struct dsdb_schema *schema,
int32_t *next_mapiid)
{
int ret;
struct ldb_context *ldb;
struct ldb_dn *schema_dn;
bool mapiid_used = true;
/* Windows' generation seems to start about here */
*next_mapiid = 60000;
ldb = ldb_module_get_ctx(ac->module);
schema_dn = ldb_get_schema_basedn(ldb);
while (mapiid_used) {
*next_mapiid += 1;
ret = samldb_check_mapiid_used(ac, schema,
schema_dn, ldb,
*next_mapiid, &mapiid_used);
if (ret != LDB_SUCCESS) {
return ret;
}
}
return LDB_SUCCESS;
}
static int samldb_schema_add_handle_mapiid(struct samldb_ctx *ac)
{
int ret;
bool ok;
struct ldb_message_element *el;
const char *enc_str;
struct ldb_context *ldb;
struct ldb_dn *schema_dn;
struct dsdb_schema *schema;
int32_t new_mapiid = 0;
/*
* The mAPIID of a new attribute should be automatically generated
* if a specific OID is put as the mAPIID, as according to
* [MS-ADTS] 3.1.1.2.3.2.
*/
ldb = ldb_module_get_ctx(ac->module);
schema = dsdb_get_schema(ldb, ac);
schema_dn = ldb_get_schema_basedn(ldb);
el = dsdb_get_single_valued_attr(ac->msg, "mAPIID",
ac->req->operation);
if (el == NULL) {
return LDB_SUCCESS;
}
enc_str = ldb_binary_encode(ac, el->values[0]);
if (enc_str == NULL) {
return ldb_module_oom(ac->module);
}
ok = (strcmp(enc_str, "1.2.840.113556.1.2.49") == 0);
if (ok) {
ret = samldb_generate_next_mapiid(ac, schema,
&new_mapiid);
if (ret != LDB_SUCCESS) {
return ret;
}
ldb_msg_remove_element(ac->msg, el);
ret = samdb_msg_add_int(ldb, ac->msg, ac->msg,
"mAPIID", new_mapiid);
return ret;
}
schema_dn = ldb_get_schema_basedn(ldb_module_get_ctx(ac->module));
ret = samldb_unique_attr_check(ac, "mAPIID", NULL, schema_dn);
if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
return LDB_ERR_UNWILLING_TO_PERFORM;
} else {
return ret;
}
}
/* sAMAccountName handling */
static int samldb_generate_sAMAccountName(struct ldb_context *ldb,
struct ldb_message *msg)
{
char *name;
/* Format: $000000-000000000000 */
name = talloc_asprintf(msg, "$%.6X-%.6X%.6X",
(unsigned int)generate_random(),
(unsigned int)generate_random(),
(unsigned int)generate_random());
if (name == NULL) {
return ldb_oom(ldb);
}
return ldb_msg_add_steal_string(msg, "sAMAccountName", name);
}
static int samldb_check_sAMAccountName(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
int ret;
if (ldb_msg_find_element(ac->msg, "sAMAccountName") == NULL) {
ret = samldb_generate_sAMAccountName(ldb, ac->msg);
if (ret != LDB_SUCCESS) {
return ret;
}
}
ret = samldb_sam_accountname_valid_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
return samldb_next_step(ac);
}
static bool samldb_msg_add_sid(struct ldb_message *msg,
const char *name,
const struct dom_sid *sid)
{
struct ldb_val v;
enum ndr_err_code ndr_err;
ndr_err = ndr_push_struct_blob(&v, msg, sid,
(ndr_push_flags_fn_t)ndr_push_dom_sid);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return false;
}
return (ldb_msg_add_value(msg, name, &v, NULL) == 0);
}
/* allocate a SID using our RID Set */
static int samldb_allocate_sid(struct samldb_ctx *ac)
{
uint32_t rid;
struct dom_sid *sid;
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
int ret;
ret = ridalloc_allocate_rid(ac->module, &rid, ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
if (sid == NULL) {
return ldb_module_oom(ac->module);
}
if ( ! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
return ldb_operr(ldb);
}
return samldb_next_step(ac);
}
/*
see if a krbtgt_number is available
*/
static bool samldb_krbtgtnumber_available(struct samldb_ctx *ac,
uint32_t krbtgt_number)
{
TALLOC_CTX *tmp_ctx = talloc_new(ac);
struct ldb_result *res;
const char * const no_attrs[] = { NULL };
int ret;
ret = dsdb_module_search(ac->module, tmp_ctx, &res,
ldb_get_default_basedn(ldb_module_get_ctx(ac->module)),
LDB_SCOPE_SUBTREE, no_attrs,
DSDB_FLAG_NEXT_MODULE,
ac->req,
"(msDC-SecondaryKrbTgtNumber=%u)",
krbtgt_number);
if (ret == LDB_SUCCESS && res->count == 0) {
talloc_free(tmp_ctx);
return true;
}
talloc_free(tmp_ctx);
return false;
}
/* special handling for add in RODC join */
static int samldb_rodc_add(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
uint32_t krbtgt_number, i_start, i;
int ret;
struct ldb_val newpass_utf16;
/* find a unused msDC-SecondaryKrbTgtNumber */
i_start = generate_random() & 0xFFFF;
if (i_start == 0) {
i_start = 1;
}
for (i=i_start; i<=0xFFFF; i++) {
if (samldb_krbtgtnumber_available(ac, i)) {
krbtgt_number = i;
goto found;
}
}
for (i=1; i<i_start; i++) {
if (samldb_krbtgtnumber_available(ac, i)) {
krbtgt_number = i;
goto found;
}
}
ldb_asprintf_errstring(ldb,
"%08X: Unable to find available msDS-SecondaryKrbTgtNumber",
W_ERROR_V(WERR_NO_SYSTEM_RESOURCES));
return LDB_ERR_OTHER;
found:
ret = ldb_msg_add_empty(ac->msg, "msDS-SecondaryKrbTgtNumber",
LDB_FLAG_INTERNAL_DISABLE_VALIDATION, NULL);
if (ret != LDB_SUCCESS) {
return ldb_operr(ldb);
}
ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
"msDS-SecondaryKrbTgtNumber", krbtgt_number);
if (ret != LDB_SUCCESS) {
return ldb_operr(ldb);
}
ret = ldb_msg_add_fmt(ac->msg, "sAMAccountName", "krbtgt_%u",
krbtgt_number);
if (ret != LDB_SUCCESS) {
return ldb_operr(ldb);
}
newpass_utf16 = data_blob_talloc_zero(ac->module, 256);
if (newpass_utf16.data == NULL) {
return ldb_oom(ldb);
}
/*
* Note that the password_hash module will ignore
* this value and use it's own generate_secret_buffer()
* that's why we can just use generate_random_buffer()
* here.
*/
generate_random_buffer(newpass_utf16.data, newpass_utf16.length);
ret = ldb_msg_add_steal_value(ac->msg, "clearTextPassword", &newpass_utf16);
if (ret != LDB_SUCCESS) {
return ldb_operr(ldb);
}
return samldb_next_step(ac);
}
static int samldb_find_for_defaultObjectCategory(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
struct ldb_result *res;
const char * const no_attrs[] = { NULL };
int ret;
ac->res_dn = NULL;
ret = dsdb_module_search(ac->module, ac, &res,
ac->dn, LDB_SCOPE_BASE, no_attrs,
DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT
| DSDB_FLAG_NEXT_MODULE,
ac->req,
"(objectClass=classSchema)");
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
/* Don't be pricky when the DN doesn't exist if we have the */
/* RELAX control specified */
if (ldb_request_get_control(ac->req,
LDB_CONTROL_RELAX_OID) == NULL) {
ldb_set_errstring(ldb,
"samldb_find_defaultObjectCategory: "
"Invalid DN for 'defaultObjectCategory'!");
return LDB_ERR_CONSTRAINT_VIOLATION;
}
}
if ((ret != LDB_ERR_NO_SUCH_OBJECT) && (ret != LDB_SUCCESS)) {
return ret;
}
if (ret == LDB_SUCCESS) {
/* ensure the defaultObjectCategory has a full GUID */
struct ldb_message *m;
m = ldb_msg_new(ac->msg);
if (m == NULL) {
return ldb_oom(ldb);
}
m->dn = ac->msg->dn;
if (ldb_msg_add_string(m, "defaultObjectCategory",
ldb_dn_get_extended_linearized(m, res->msgs[0]->dn, 1)) !=
LDB_SUCCESS) {
return ldb_oom(ldb);
}
m->elements[0].flags = LDB_FLAG_MOD_REPLACE;
ret = dsdb_module_modify(ac->module, m,
DSDB_FLAG_NEXT_MODULE,
ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
}
ac->res_dn = ac->dn;
return samldb_next_step(ac);
}
/**
* msDS-IntId attributeSchema attribute handling
* during LDB_ADD request processing
*/
static int samldb_add_handle_msDS_IntId(struct samldb_ctx *ac)
{
int ret;
bool id_exists;
uint32_t msds_intid;
int32_t system_flags;
struct ldb_context *ldb;
struct ldb_result *ldb_res;
struct ldb_dn *schema_dn;
struct samldb_msds_intid_persistant *msds_intid_struct;
struct dsdb_schema *schema;
ldb = ldb_module_get_ctx(ac->module);
schema_dn = ldb_get_schema_basedn(ldb);
/* replicated update should always go through */
if (ldb_request_get_control(ac->req,
DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
return LDB_SUCCESS;
}
/* msDS-IntId is handled by system and should never be
* passed by clients */
if (ldb_msg_find_element(ac->msg, "msDS-IntId")) {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* do not generate msDS-IntId if Relax control is passed */
if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
return LDB_SUCCESS;
}
/* check Functional Level */
if (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003) {
return LDB_SUCCESS;
}
/* check systemFlags for SCHEMA_BASE_OBJECT flag */
system_flags = ldb_msg_find_attr_as_int(ac->msg, "systemFlags", 0);
if (system_flags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) {
return LDB_SUCCESS;
}
schema = dsdb_get_schema(ldb, NULL);
if (!schema) {
ldb_debug_set(ldb, LDB_DEBUG_FATAL,
"samldb_schema_info_update: no dsdb_schema loaded");
DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
return ldb_operr(ldb);
}
msds_intid_struct = (struct samldb_msds_intid_persistant*) ldb_get_opaque(ldb, SAMLDB_MSDS_INTID_OPAQUE);
if (!msds_intid_struct) {
msds_intid_struct = talloc(ldb, struct samldb_msds_intid_persistant);
/* Generate new value for msDs-IntId
* Value should be in 0x80000000..0xBFFFFFFF range */
msds_intid = generate_random() % 0X3FFFFFFF;
msds_intid += 0x80000000;
msds_intid_struct->msds_intid = msds_intid;
DEBUG(2, ("No samldb_msds_intid_persistant struct, allocating a new one\n"));
} else {
msds_intid = msds_intid_struct->msds_intid;
}
/* probe id values until unique one is found */
do {
msds_intid++;
if (msds_intid > 0xBFFFFFFF) {
msds_intid = 0x80000001;
}
/*
* We search in the schema if we have already this
* intid (using dsdb_attribute_by_attributeID_id
* because in the range 0x80000000 0xBFFFFFFFF,
* attributeID is a DSDB_ATTID_TYPE_INTID).
*
* If so generate another random value.
*
* We have to check the DB in case someone else has
* modified the database while we are doing our
* changes too (this case should be very bery rare) in
* order to be sure.
*/
if (dsdb_attribute_by_attributeID_id(schema, msds_intid)) {
id_exists = true;
msds_intid = generate_random() % 0X3FFFFFFF;
msds_intid += 0x80000000;
continue;
}
ret = dsdb_module_search(ac->module, ac,
&ldb_res,
schema_dn, LDB_SCOPE_ONELEVEL, NULL,
DSDB_FLAG_NEXT_MODULE,
ac->req,
"(msDS-IntId=%d)", msds_intid);
if (ret != LDB_SUCCESS) {
ldb_debug_set(ldb, LDB_DEBUG_ERROR,
__location__": Searching for msDS-IntId=%d failed - %s\n",
msds_intid,
ldb_errstring(ldb));
return ldb_operr(ldb);
}
id_exists = (ldb_res->count > 0);
talloc_free(ldb_res);
} while(id_exists);
msds_intid_struct->msds_intid = msds_intid;
ldb_set_opaque(ldb, SAMLDB_MSDS_INTID_OPAQUE, msds_intid_struct);
return samdb_msg_add_int(ldb, ac->msg, ac->msg, "msDS-IntId",
msds_intid);
}
/*
* samldb_add_entry (async)
*/
static int samldb_add_entry_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct samldb_ctx *ac;
int ret;
ac = talloc_get_type(req->context, struct samldb_ctx);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->type == LDB_REPLY_REFERRAL) {
return ldb_module_send_referral(ac->req, ares->referral);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
if (ares->type != LDB_REPLY_DONE) {
ldb_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
/* The caller may wish to get controls back from the add */
ac->ares = talloc_steal(ac, ares);
ret = samldb_next_step(ac);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
return ret;
}
static int samldb_add_entry(struct samldb_ctx *ac)
{
struct ldb_context *ldb;
struct ldb_request *req;
int ret;
ldb = ldb_module_get_ctx(ac->module);
ret = ldb_build_add_req(&req, ldb, ac,
ac->msg,
ac->req->controls,
ac, samldb_add_entry_callback,
ac->req);
LDB_REQ_SET_LOCATION(req);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_next_request(ac->module, req);
}
/*
* return true if msg carries an attributeSchema that is intended to be RODC
* filtered but is also a system-critical attribute.
*/
static bool check_rodc_critical_attribute(struct ldb_message *msg)
{
uint32_t schemaFlagsEx, searchFlags, rodc_filtered_flags;
schemaFlagsEx = ldb_msg_find_attr_as_uint(msg, "schemaFlagsEx", 0);
searchFlags = ldb_msg_find_attr_as_uint(msg, "searchFlags", 0);
rodc_filtered_flags = (SEARCH_FLAG_RODC_ATTRIBUTE
| SEARCH_FLAG_CONFIDENTIAL);
if ((schemaFlagsEx & SCHEMA_FLAG_ATTR_IS_CRITICAL) &&
((searchFlags & rodc_filtered_flags) == rodc_filtered_flags)) {
return true;
} else {
return false;
}
}
static int samldb_fill_object(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
int ret;
/* Add information for the different account types */
switch(ac->type) {
case SAMLDB_TYPE_USER: {
struct ldb_control *rodc_control = ldb_request_get_control(ac->req,
LDB_CONTROL_RODC_DCPROMO_OID);
if (rodc_control != NULL) {
/* see [MS-ADTS] 3.1.1.3.4.1.23 LDAP_SERVER_RODC_DCPROMO_OID */
rodc_control->critical = false;
ret = samldb_add_step(ac, samldb_rodc_add);
if (ret != LDB_SUCCESS) return ret;
}
/* check if we have a valid sAMAccountName */
ret = samldb_add_step(ac, samldb_check_sAMAccountName);
if (ret != LDB_SUCCESS) return ret;
ret = samldb_add_step(ac, samldb_add_entry);
if (ret != LDB_SUCCESS) return ret;
break;
}
case SAMLDB_TYPE_GROUP: {
/* check if we have a valid sAMAccountName */
ret = samldb_add_step(ac, samldb_check_sAMAccountName);
if (ret != LDB_SUCCESS) return ret;
ret = samldb_add_step(ac, samldb_add_entry);
if (ret != LDB_SUCCESS) return ret;
break;
}
case SAMLDB_TYPE_CLASS: {
const char *lDAPDisplayName = NULL;
const struct ldb_val *rdn_value, *def_obj_cat_val;
unsigned int v = ldb_msg_find_attr_as_uint(ac->msg, "objectClassCategory", -2);
/* As discussed with Microsoft through dochelp in April 2012 this is the behavior of windows*/
if (!ldb_msg_find_element(ac->msg, "subClassOf")) {
ret = ldb_msg_add_string(ac->msg, "subClassOf", "top");
if (ret != LDB_SUCCESS) return ret;
}
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"rdnAttId", "cn");
if (ret != LDB_SUCCESS) return ret;
/* do not allow one to mark an attributeSchema as RODC filtered if it
* is system-critical */
if (check_rodc_critical_attribute(ac->msg)) {
ldb_asprintf_errstring(ldb, "Refusing schema add of %s - cannot combine critical class with RODC filtering",
ldb_dn_get_linearized(ac->msg->dn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
if (rdn_value == NULL) {
return ldb_operr(ldb);
}
if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
/* the RDN has prefix "CN" */
ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
samdb_cn_to_lDAPDisplayName(ac->msg,
(const char *) rdn_value->data));
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
return ret;
}
}
lDAPDisplayName = ldb_msg_find_attr_as_string(ac->msg,
"lDAPDisplayName",
NULL);
ret = ldb_valid_attr_name(lDAPDisplayName);
if (ret != 1 ||
lDAPDisplayName[0] == '*' ||
lDAPDisplayName[0] == '@')
{
return dsdb_module_werror(ac->module,
LDB_ERR_UNWILLING_TO_PERFORM,
WERR_DS_INVALID_LDAP_DISPLAY_NAME,
"lDAPDisplayName is invalid");
}
if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
struct GUID guid;
/* a new GUID */
guid = GUID_random();
ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
return ret;
}
}
def_obj_cat_val = ldb_msg_find_ldb_val(ac->msg,
"defaultObjectCategory");
if (def_obj_cat_val != NULL) {
/* "defaultObjectCategory" has been set by the caller.
* Do some checks for consistency.
* NOTE: The real constraint check (that
* 'defaultObjectCategory' is the DN of the new
* objectclass or any parent of it) is still incomplete.
* For now we say that 'defaultObjectCategory' is valid
* if it exists and it is of objectclass "classSchema".
*/
ac->dn = ldb_dn_from_ldb_val(ac, ldb, def_obj_cat_val);
if (ac->dn == NULL) {
ldb_set_errstring(ldb,
"Invalid DN for 'defaultObjectCategory'!");
return LDB_ERR_CONSTRAINT_VIOLATION;
}
} else {
/* "defaultObjectCategory" has not been set by the
* caller. Use the entry DN for it. */
ac->dn = ac->msg->dn;
ret = ldb_msg_add_string(ac->msg, "defaultObjectCategory",
ldb_dn_alloc_linearized(ac->msg, ac->dn));
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
return ret;
}
}
ret = samldb_add_step(ac, samldb_add_entry);
if (ret != LDB_SUCCESS) return ret;
/* Now perform the checks for the 'defaultObjectCategory'. The
* lookup DN was already saved in "ac->dn" */
ret = samldb_add_step(ac, samldb_find_for_defaultObjectCategory);
if (ret != LDB_SUCCESS) return ret;
/* -2 is not a valid objectClassCategory so it means the attribute wasn't present */
if (v == -2) {
/* Windows 2003 does this*/
ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "objectClassCategory", 0);
if (ret != LDB_SUCCESS) {
return ret;
}
}
break;
}
case SAMLDB_TYPE_ATTRIBUTE: {
const char *lDAPDisplayName = NULL;
const struct ldb_val *rdn_value;
struct ldb_message_element *el;
rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
if (rdn_value == NULL) {
return ldb_operr(ldb);
}
if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
/* the RDN has prefix "CN" */
ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
samdb_cn_to_lDAPDisplayName(ac->msg,
(const char *) rdn_value->data));
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
return ret;
}
}
lDAPDisplayName = ldb_msg_find_attr_as_string(ac->msg,
"lDAPDisplayName",
NULL);
ret = ldb_valid_attr_name(lDAPDisplayName);
if (ret != 1 ||
lDAPDisplayName[0] == '*' ||
lDAPDisplayName[0] == '@')
{
return dsdb_module_werror(ac->module,
LDB_ERR_UNWILLING_TO_PERFORM,
WERR_DS_INVALID_LDAP_DISPLAY_NAME,
"lDAPDisplayName is invalid");
}
/* do not allow one to mark an attributeSchema as RODC filtered if it
* is system-critical */
if (check_rodc_critical_attribute(ac->msg)) {
ldb_asprintf_errstring(ldb,
"samldb: refusing schema add of %s - cannot combine critical attribute with RODC filtering",
ldb_dn_get_linearized(ac->msg->dn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"isSingleValued", "FALSE");
if (ret != LDB_SUCCESS) return ret;
if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
struct GUID guid;
/* a new GUID */
guid = GUID_random();
ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
return ret;
}
}
el = ldb_msg_find_element(ac->msg, "attributeSyntax");
if (el) {
/*
* No need to scream if there isn't as we have code later on
* that will take care of it.
*/
const struct dsdb_syntax *syntax = find_syntax_map_by_ad_oid((const char *)el->values[0].data);
if (!syntax) {
DEBUG(9, ("Can't find dsdb_syntax object for attributeSyntax %s\n",
(const char *)el->values[0].data));
} else {
unsigned int v = ldb_msg_find_attr_as_uint(ac->msg, "oMSyntax", 0);
const struct ldb_val *val = ldb_msg_find_ldb_val(ac->msg, "oMObjectClass");
if (v == 0) {
ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "oMSyntax", syntax->oMSyntax);
if (ret != LDB_SUCCESS) {
return ret;
}
}
if (!val) {
struct ldb_val val2 = ldb_val_dup(ldb, &syntax->oMObjectClass);
if (val2.length > 0) {
ret = ldb_msg_add_value(ac->msg, "oMObjectClass", &val2, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
}
}
}
}
/* handle msDS-IntID attribute */
ret = samldb_add_handle_msDS_IntId(ac);
if (ret != LDB_SUCCESS) return ret;
ret = samldb_add_step(ac, samldb_add_entry);
if (ret != LDB_SUCCESS) return ret;
break;
}
default:
ldb_asprintf_errstring(ldb, "Invalid entry type!");
return LDB_ERR_OPERATIONS_ERROR;
break;
}
return samldb_first_step(ac);
}
static int samldb_fill_foreignSecurityPrincipal_object(struct samldb_ctx *ac)
{
struct ldb_context *ldb = NULL;
const struct ldb_val *rdn_value = NULL;
struct ldb_message_element *sid_el = NULL;
struct dom_sid *sid = NULL;
struct ldb_control *as_system = NULL;
struct ldb_control *provision = NULL;
bool allowed = false;
int ret;
ldb = ldb_module_get_ctx(ac->module);
as_system = ldb_request_get_control(ac->req, LDB_CONTROL_AS_SYSTEM_OID);
if (as_system != NULL) {
allowed = true;
}
provision = ldb_request_get_control(ac->req, LDB_CONTROL_PROVISION_OID);
if (provision != NULL) {
allowed = true;
}
sid_el = ldb_msg_find_element(ac->msg, "objectSid");
if (!allowed && sid_el == NULL) {
return dsdb_module_werror(ac->module,
LDB_ERR_OBJECT_CLASS_VIOLATION,
WERR_DS_MISSING_REQUIRED_ATT,
"objectSid missing on foreignSecurityPrincipal");
}
if (!allowed) {
return dsdb_module_werror(ac->module,
LDB_ERR_UNWILLING_TO_PERFORM,
WERR_DS_ILLEGAL_MOD_OPERATION,
"foreignSecurityPrincipal object not allowed");
}
if (sid_el != NULL) {
sid = samdb_result_dom_sid(ac->msg, ac->msg, "objectSid");
if (sid == NULL) {
ldb_set_errstring(ldb,
"samldb: invalid objectSid!");
return LDB_ERR_CONSTRAINT_VIOLATION;
}
}
if (sid == NULL) {
rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
if (rdn_value == NULL) {
return ldb_operr(ldb);
}
sid = dom_sid_parse_talloc(ac->msg,
(const char *)rdn_value->data);
if (sid == NULL) {
ldb_set_errstring(ldb,
"samldb: No valid SID found in ForeignSecurityPrincipal CN!");
return LDB_ERR_CONSTRAINT_VIOLATION;
}
if (! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
return ldb_operr(ldb);
}
}
/* finally proceed with adding the entry */
ret = samldb_add_step(ac, samldb_add_entry);
if (ret != LDB_SUCCESS) return ret;
return samldb_first_step(ac);
}
static int samldb_schema_info_update(struct samldb_ctx *ac)
{
int ret;
struct ldb_context *ldb;
struct dsdb_schema *schema;
/* replicated update should always go through */
if (ldb_request_get_control(ac->req,
DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
return LDB_SUCCESS;
}
/* do not update schemaInfo during provisioning */
if (ldb_request_get_control(ac->req, LDB_CONTROL_PROVISION_OID)) {
return LDB_SUCCESS;
}
ldb = ldb_module_get_ctx(ac->module);
schema = dsdb_get_schema(ldb, NULL);
if (!schema) {
ldb_debug_set(ldb, LDB_DEBUG_FATAL,
"samldb_schema_info_update: no dsdb_schema loaded");
DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
return ldb_operr(ldb);
}
ret = dsdb_module_schema_info_update(ac->module, schema,
DSDB_FLAG_NEXT_MODULE|
DSDB_FLAG_AS_SYSTEM,
ac->req);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb,
"samldb_schema_info_update: dsdb_module_schema_info_update failed with %s",
ldb_errstring(ldb));
return ret;
}
return LDB_SUCCESS;
}
static int samldb_prim_group_tester(struct samldb_ctx *ac, uint32_t rid);
static int samldb_check_user_account_control_rules(struct samldb_ctx *ac,
struct dom_sid *sid,
uint32_t req_uac,
uint32_t user_account_control,
uint32_t user_account_control_old);
/*
* "Objectclass" trigger (MS-SAMR 3.1.1.8.1)
*
* Has to be invoked on "add" and "modify" operations on "user", "computer" and
* "group" objects.
* ac->msg contains the "add"/"modify" message
* ac->type contains the object type (main objectclass)
*/
static int samldb_objectclass_trigger(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
void *skip_allocate_sids = ldb_get_opaque(ldb,
"skip_allocate_sids");
struct ldb_message_element *el, *el2;
struct dom_sid *sid;
int ret;
/* make sure that "sAMAccountType" is not specified */
el = ldb_msg_find_element(ac->msg, "sAMAccountType");
if (el != NULL) {
ldb_set_errstring(ldb,
"samldb: sAMAccountType must not be specified!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* Step 1: objectSid assignment */
/* Don't allow the objectSid to be changed. But beside the RELAX
* control we have also to guarantee that it can always be set with
* SYSTEM permissions. This is needed for the "samba3sam" backend. */
sid = samdb_result_dom_sid(ac, ac->msg, "objectSid");
if ((sid != NULL) && (!dsdb_module_am_system(ac->module)) &&
(ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL)) {
ldb_set_errstring(ldb,
"samldb: objectSid must not be specified!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* but generate a new SID when we do have an add operations */
if ((sid == NULL) && (ac->req->operation == LDB_ADD) && !skip_allocate_sids) {
ret = samldb_add_step(ac, samldb_allocate_sid);
if (ret != LDB_SUCCESS) return ret;
}
switch(ac->type) {
case SAMLDB_TYPE_USER: {
bool uac_generated = false, uac_add_flags = false;
/* Step 1.2: Default values */
ret = dsdb_user_obj_set_defaults(ldb, ac->msg, ac->req);
if (ret != LDB_SUCCESS) return ret;
/* On add operations we might need to generate a
* "userAccountControl" (if it isn't specified). */
el = ldb_msg_find_element(ac->msg, "userAccountControl");
if ((el == NULL) && (ac->req->operation == LDB_ADD)) {
ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
"userAccountControl",
UF_NORMAL_ACCOUNT);
if (ret != LDB_SUCCESS) {
return ret;
}
uac_generated = true;
uac_add_flags = true;
}
el = ldb_msg_find_element(ac->msg, "userAccountControl");
if (el != NULL) {
uint32_t raw_uac;
uint32_t user_account_control;
/* Step 1.3: "userAccountControl" -> "sAMAccountType" mapping */
user_account_control = ldb_msg_find_attr_as_uint(ac->msg,
"userAccountControl",
0);
raw_uac = user_account_control;
/*
* "userAccountControl" = 0 or missing one of
* the types means "UF_NORMAL_ACCOUNT". See
* MS-SAMR 3.1.1.8.10 point 8
*/
if ((user_account_control & UF_ACCOUNT_TYPE_MASK) == 0) {
user_account_control = UF_NORMAL_ACCOUNT | user_account_control;
uac_generated = true;
}
/*
* As per MS-SAMR 3.1.1.8.10 these flags have not to be set
*/
if ((user_account_control & UF_LOCKOUT) != 0) {
user_account_control &= ~UF_LOCKOUT;
uac_generated = true;
}
if ((user_account_control & UF_PASSWORD_EXPIRED) != 0) {
user_account_control &= ~UF_PASSWORD_EXPIRED;
uac_generated = true;
}
ret = samldb_check_user_account_control_rules(ac, NULL,
raw_uac,
user_account_control,
0);
if (ret != LDB_SUCCESS) {
return ret;
}
/* Workstation and (read-only) DC objects do need objectclass "computer" */
if ((samdb_find_attribute(ldb, ac->msg,
"objectclass", "computer") == NULL) &&
(user_account_control &
(UF_SERVER_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT))) {
ldb_set_errstring(ldb,
"samldb: Requested account type does need objectclass 'computer'!");
return LDB_ERR_OBJECT_CLASS_VIOLATION;
}
/* add "sAMAccountType" attribute */
ret = dsdb_user_obj_set_account_type(ldb, ac->msg, user_account_control, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
/* "isCriticalSystemObject" might be set */
if (user_account_control &
(UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
"TRUE");
if (ret != LDB_SUCCESS) {
return ret;
}
el2 = ldb_msg_find_element(ac->msg,
"isCriticalSystemObject");
el2->flags = LDB_FLAG_MOD_REPLACE;
} else if (user_account_control & UF_WORKSTATION_TRUST_ACCOUNT) {
ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
"FALSE");
if (ret != LDB_SUCCESS) {
return ret;
}
el2 = ldb_msg_find_element(ac->msg,
"isCriticalSystemObject");
el2->flags = LDB_FLAG_MOD_REPLACE;
}
/* Step 1.4: "userAccountControl" -> "primaryGroupID" mapping */
if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
uint32_t rid;
ret = dsdb_user_obj_set_primary_group_id(ldb, ac->msg, user_account_control, &rid);
if (ret != LDB_SUCCESS) {
return ret;
}
/*
* Older AD deployments don't know about the
* RODC group
*/
if (rid == DOMAIN_RID_READONLY_DCS) {
ret = samldb_prim_group_tester(ac, rid);
if (ret != LDB_SUCCESS) {
return ret;
}
}
}
/* Step 1.5: Add additional flags when needed */
/* Obviously this is done when the "userAccountControl"
* has been generated here (tested against Windows
* Server) */
if (uac_generated) {
if (uac_add_flags) {
user_account_control |= UF_ACCOUNTDISABLE;
user_account_control |= UF_PASSWD_NOTREQD;
}
ret = samdb_msg_set_uint(ldb, ac->msg, ac->msg,
"userAccountControl",
user_account_control);
if (ret != LDB_SUCCESS) {
return ret;
}
}
}
break;
}
case SAMLDB_TYPE_GROUP: {
const char *tempstr;
/* Step 2.2: Default values */
tempstr = talloc_asprintf(ac->msg, "%d",
GTYPE_SECURITY_GLOBAL_GROUP);
if (tempstr == NULL) return ldb_operr(ldb);
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"groupType", tempstr);
if (ret != LDB_SUCCESS) return ret;
/* Step 2.3: "groupType" -> "sAMAccountType" */
el = ldb_msg_find_element(ac->msg, "groupType");
if (el != NULL) {
uint32_t group_type, account_type;
group_type = ldb_msg_find_attr_as_uint(ac->msg,
"groupType", 0);
/* The creation of builtin groups requires the
* RELAX control */
if (group_type == GTYPE_SECURITY_BUILTIN_LOCAL_GROUP) {
if (ldb_request_get_control(ac->req,
LDB_CONTROL_RELAX_OID) == NULL) {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
}
account_type = ds_gtype2atype(group_type);
if (account_type == 0) {
ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
"sAMAccountType",
account_type);
if (ret != LDB_SUCCESS) {
return ret;
}
el2 = ldb_msg_find_element(ac->msg, "sAMAccountType");
el2->flags = LDB_FLAG_MOD_REPLACE;
}
break;
}
default:
ldb_asprintf_errstring(ldb,
"Invalid entry type!");
return LDB_ERR_OPERATIONS_ERROR;
break;
}
return LDB_SUCCESS;
}
/*
* "Primary group ID" trigger (MS-SAMR 3.1.1.8.2)
*
* Has to be invoked on "add" and "modify" operations on "user" and "computer"
* objects.
* ac->msg contains the "add"/"modify" message
*/
static int samldb_prim_group_tester(struct samldb_ctx *ac, uint32_t rid)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
struct dom_sid *sid;
struct ldb_result *res;
int ret;
const char * const noattrs[] = { NULL };
sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
if (sid == NULL) {
return ldb_operr(ldb);
}
ret = dsdb_module_search(ac->module, ac, &res,
ldb_get_default_basedn(ldb),
LDB_SCOPE_SUBTREE,
noattrs, DSDB_FLAG_NEXT_MODULE,
ac->req,
"(objectSid=%s)",
ldap_encode_ndr_dom_sid(ac, sid));
if (ret != LDB_SUCCESS) {
return ret;
}
if (res->count != 1) {
talloc_free(res);
ldb_asprintf_errstring(ldb,
"Failed to find primary group with RID %u!",
rid);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
talloc_free(res);
return LDB_SUCCESS;
}
static int samldb_prim_group_set(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
uint32_t rid;
rid = ldb_msg_find_attr_as_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
if (rid == (uint32_t) -1) {
/* we aren't affected of any primary group set */
return LDB_SUCCESS;
} else if (!ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
ldb_set_errstring(ldb,
"The primary group isn't settable on add operations!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
return samldb_prim_group_tester(ac, rid);
}
static int samldb_prim_group_change(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
const char * const attrs[] = {
"primaryGroupID",
"memberOf",
"userAccountControl",
NULL };
struct ldb_result *res, *group_res;
struct ldb_message_element *el;
struct ldb_message *msg;
uint32_t search_flags =
DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_EXTENDED_DN;
uint32_t prev_rid, new_rid, uac;
struct dom_sid *prev_sid, *new_sid;
struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
const char *new_prim_group_dn_ext_str = NULL;
struct ldb_dn *user_dn = NULL;
const char *user_dn_ext_str = NULL;
int ret;
const char * const noattrs[] = { NULL };
el = dsdb_get_single_valued_attr(ac->msg, "primaryGroupID",
ac->req->operation);
if (el == NULL) {
/* we are not affected */
return LDB_SUCCESS;
}
/* Fetch information from the existing object */
ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
search_flags, ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
user_dn = res->msgs[0]->dn;
user_dn_ext_str = ldb_dn_get_extended_linearized(ac, user_dn, 1);
if (user_dn_ext_str == NULL) {
return ldb_operr(ldb);
}
uac = ldb_msg_find_attr_as_uint(res->msgs[0], "userAccountControl", 0);
/* Finds out the DN of the old primary group */
prev_rid = ldb_msg_find_attr_as_uint(res->msgs[0], "primaryGroupID",
(uint32_t) -1);
if (prev_rid == (uint32_t) -1) {
/* User objects do always have a mandatory "primaryGroupID"
* attribute. If this doesn't exist then the object is of the
* wrong type. This is the exact Windows error code */
return LDB_ERR_OBJECT_CLASS_VIOLATION;
}
prev_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), prev_rid);
if (prev_sid == NULL) {
return ldb_operr(ldb);
}
/* Finds out the DN of the new primary group
* Notice: in order to parse the primary group ID correctly we create
* a temporary message here. */
msg = ldb_msg_new(ac->msg);
if (msg == NULL) {
return ldb_module_oom(ac->module);
}
ret = ldb_msg_add(msg, el, 0);
if (ret != LDB_SUCCESS) {
return ret;
}
new_rid = ldb_msg_find_attr_as_uint(msg, "primaryGroupID", (uint32_t) -1);
talloc_free(msg);
if (new_rid == (uint32_t) -1) {
/* we aren't affected of any primary group change */
return LDB_SUCCESS;
}
if (prev_rid == new_rid) {
return LDB_SUCCESS;
}
if ((uac & UF_SERVER_TRUST_ACCOUNT) && new_rid != DOMAIN_RID_DCS) {
ldb_asprintf_errstring(ldb,
"%08X: samldb: UF_SERVER_TRUST_ACCOUNT requires "
"primaryGroupID=%u!",
W_ERROR_V(WERR_DS_CANT_MOD_PRIMARYGROUPID),
DOMAIN_RID_DCS);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
if ((uac & UF_PARTIAL_SECRETS_ACCOUNT) && new_rid != DOMAIN_RID_READONLY_DCS) {
ldb_asprintf_errstring(ldb,
"%08X: samldb: UF_PARTIAL_SECRETS_ACCOUNT requires "
"primaryGroupID=%u!",
W_ERROR_V(WERR_DS_CANT_MOD_PRIMARYGROUPID),
DOMAIN_RID_READONLY_DCS);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
ret = dsdb_module_search(ac->module, ac, &group_res,
ldb_get_default_basedn(ldb),
LDB_SCOPE_SUBTREE,
noattrs, search_flags,
ac->req,
"(objectSid=%s)",
ldap_encode_ndr_dom_sid(ac, prev_sid));
if (ret != LDB_SUCCESS) {
return ret;
}
if (group_res->count != 1) {
return ldb_operr(ldb);
}
prev_prim_group_dn = group_res->msgs[0]->dn;
new_sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), new_rid);
if (new_sid == NULL) {
return ldb_operr(ldb);
}
ret = dsdb_module_search(ac->module, ac, &group_res,
ldb_get_default_basedn(ldb),
LDB_SCOPE_SUBTREE,
noattrs, search_flags,
ac->req,
"(objectSid=%s)",
ldap_encode_ndr_dom_sid(ac, new_sid));
if (ret != LDB_SUCCESS) {
return ret;
}
if (group_res->count != 1) {
/* Here we know if the specified new primary group candidate is
* valid or not. */
return LDB_ERR_UNWILLING_TO_PERFORM;
}
new_prim_group_dn = group_res->msgs[0]->dn;
new_prim_group_dn_ext_str = ldb_dn_get_extended_linearized(ac,
new_prim_group_dn, 1);
if (new_prim_group_dn_ext_str == NULL) {
return ldb_operr(ldb);
}
/* We need to be already a normal member of the new primary
* group in order to be successful. */
el = samdb_find_attribute(ldb, res->msgs[0], "memberOf",
new_prim_group_dn_ext_str);
if (el == NULL) {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* Remove the "member" attribute on the new primary group */
msg = ldb_msg_new(ac->msg);
if (msg == NULL) {
return ldb_module_oom(ac->module);
}
msg->dn = new_prim_group_dn;
ret = samdb_msg_add_delval(ldb, msg, msg, "member", user_dn_ext_str);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
talloc_free(msg);
/* Add a "member" attribute for the previous primary group */
msg = ldb_msg_new(ac->msg);
if (msg == NULL) {
return ldb_module_oom(ac->module);
}
msg->dn = prev_prim_group_dn;
ret = samdb_msg_add_addval(ldb, msg, msg, "member", user_dn_ext_str);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE, ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
talloc_free(msg);
return LDB_SUCCESS;
}
static int samldb_prim_group_trigger(struct samldb_ctx *ac)
{
int ret;
if (ac->req->operation == LDB_ADD) {
ret = samldb_prim_group_set(ac);
} else {
ret = samldb_prim_group_change(ac);
}
return ret;
}
static int samldb_check_user_account_control_invariants(struct samldb_ctx *ac,
uint32_t user_account_control)
{
int i, ret = 0;
bool need_check = false;
const struct uac_to_guid {
uint32_t uac;
bool never;
uint32_t needs;
uint32_t not_with;
const char *error_string;
} map[] = {
{
.uac = UF_TEMP_DUPLICATE_ACCOUNT,
.never = true,
.error_string = "Updating the UF_TEMP_DUPLICATE_ACCOUNT flag is never allowed"
},
{
.uac = UF_PARTIAL_SECRETS_ACCOUNT,
.needs = UF_WORKSTATION_TRUST_ACCOUNT,
.error_string = "Setting UF_PARTIAL_SECRETS_ACCOUNT only permitted with UF_WORKSTATION_TRUST_ACCOUNT"
},
{
.uac = UF_TRUSTED_FOR_DELEGATION,
.not_with = UF_PARTIAL_SECRETS_ACCOUNT,
.error_string = "Setting UF_TRUSTED_FOR_DELEGATION not allowed with UF_PARTIAL_SECRETS_ACCOUNT"
},
{
.uac = UF_NORMAL_ACCOUNT,
.not_with = UF_ACCOUNT_TYPE_MASK & ~UF_NORMAL_ACCOUNT,
.error_string = "Setting more than one account type not permitted"
},
{
.uac = UF_WORKSTATION_TRUST_ACCOUNT,
.not_with = UF_ACCOUNT_TYPE_MASK & ~UF_WORKSTATION_TRUST_ACCOUNT,
.error_string = "Setting more than one account type not permitted"
},
{
.uac = UF_INTERDOMAIN_TRUST_ACCOUNT,
.not_with = UF_ACCOUNT_TYPE_MASK & ~UF_INTERDOMAIN_TRUST_ACCOUNT,
.error_string = "Setting more than one account type not permitted"
},
{
.uac = UF_SERVER_TRUST_ACCOUNT,
.not_with = UF_ACCOUNT_TYPE_MASK & ~UF_SERVER_TRUST_ACCOUNT,
.error_string = "Setting more than one account type not permitted"
},
{
.uac = UF_TRUSTED_FOR_DELEGATION,
.not_with = UF_PARTIAL_SECRETS_ACCOUNT,
.error_string = "Setting UF_TRUSTED_FOR_DELEGATION not allowed with UF_PARTIAL_SECRETS_ACCOUNT"
}
};
for (i = 0; i < ARRAY_SIZE(map); i++) {
if (user_account_control & map[i].uac) {
need_check = true;
break;
}
}
if (need_check == false) {
return LDB_SUCCESS;
}
for (i = 0; i < ARRAY_SIZE(map); i++) {
uint32_t this_uac = user_account_control & map[i].uac;
if (this_uac != 0) {
if (map[i].never) {
ret = LDB_ERR_OTHER;
break;
} else if (map[i].needs != 0) {
if ((map[i].needs & user_account_control) == 0) {
ret = LDB_ERR_OTHER;
break;
}
} else if (map[i].not_with != 0) {
if ((map[i].not_with & user_account_control) != 0) {
ret = LDB_ERR_OTHER;
break;
}
}
}
}
if (ret != LDB_SUCCESS) {
switch (ac->req->operation) {
case LDB_ADD:
ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
"Failed to add %s: %s",
ldb_dn_get_linearized(ac->msg->dn),
map[i].error_string);
break;
case LDB_MODIFY:
ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
"Failed to modify %s: %s",
ldb_dn_get_linearized(ac->msg->dn),
map[i].error_string);
break;
default:
return ldb_module_operr(ac->module);
}
}
return ret;
}
/**
* Validate that the restriction in point 5 of MS-SAMR 3.1.1.8.10 userAccountControl is honoured
*
*/
static int samldb_check_user_account_control_acl(struct samldb_ctx *ac,
struct dom_sid *sid,
uint32_t user_account_control,
uint32_t user_account_control_old)
{
int i, ret = 0;
bool need_acl_check = false;
struct ldb_result *res;
const char * const sd_attrs[] = {"ntSecurityDescriptor", NULL};
struct security_token *user_token;
struct security_descriptor *domain_sd;
struct ldb_dn *domain_dn = ldb_get_default_basedn(ldb_module_get_ctx(ac->module));
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
const struct uac_to_guid {
uint32_t uac;
uint32_t priv_to_change_from;
const char *oid;
const char *guid;
enum sec_privilege privilege;
bool delete_is_privileged;
bool admin_required;
const char *error_string;
} map[] = {
{
.uac = UF_PASSWD_NOTREQD,
.guid = GUID_DRS_UPDATE_PASSWORD_NOT_REQUIRED_BIT,
.error_string = "Adding the UF_PASSWD_NOTREQD bit in userAccountControl requires the Update-Password-Not-Required-Bit right that was not given on the Domain object"
},
{
.uac = UF_DONT_EXPIRE_PASSWD,
.guid = GUID_DRS_UNEXPIRE_PASSWORD,
.error_string = "Adding the UF_DONT_EXPIRE_PASSWD bit in userAccountControl requires the Unexpire-Password right that was not given on the Domain object"
},
{
.uac = UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED,
.guid = GUID_DRS_ENABLE_PER_USER_REVERSIBLY_ENCRYPTED_PASSWORD,
.error_string = "Adding the UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED bit in userAccountControl requires the Enable-Per-User-Reversibly-Encrypted-Password right that was not given on the Domain object"
},
{
.uac = UF_SERVER_TRUST_ACCOUNT,
.guid = GUID_DRS_DS_INSTALL_REPLICA,
.error_string = "Adding the UF_SERVER_TRUST_ACCOUNT bit in userAccountControl requires the DS-Install-Replica right that was not given on the Domain object"
},
{
.uac = UF_PARTIAL_SECRETS_ACCOUNT,
.guid = GUID_DRS_DS_INSTALL_REPLICA,
.error_string = "Adding the UF_PARTIAL_SECRETS_ACCOUNT bit in userAccountControl requires the DS-Install-Replica right that was not given on the Domain object"
},
{
.uac = UF_WORKSTATION_TRUST_ACCOUNT,
.priv_to_change_from = UF_NORMAL_ACCOUNT,
.error_string = "Swapping UF_NORMAL_ACCOUNT to UF_WORKSTATION_TRUST_ACCOUNT requires the user to be a member of the domain admins group"
},
{
.uac = UF_NORMAL_ACCOUNT,
.priv_to_change_from = UF_WORKSTATION_TRUST_ACCOUNT,
.error_string = "Swapping UF_WORKSTATION_TRUST_ACCOUNT to UF_NORMAL_ACCOUNT requires the user to be a member of the domain admins group"
},
{
.uac = UF_INTERDOMAIN_TRUST_ACCOUNT,
.oid = DSDB_CONTROL_PERMIT_INTERDOMAIN_TRUST_UAC_OID,
.error_string = "Updating the UF_INTERDOMAIN_TRUST_ACCOUNT bit in userAccountControl is not permitted over LDAP. This bit is restricted to the LSA CreateTrustedDomain interface",
.delete_is_privileged = true
},
{
.uac = UF_TRUSTED_FOR_DELEGATION,
.privilege = SEC_PRIV_ENABLE_DELEGATION,
.delete_is_privileged = true,
.error_string = "Updating the UF_TRUSTED_FOR_DELEGATION bit in userAccountControl is not permitted without the SeEnableDelegationPrivilege"
},
{
.uac = UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION,
.privilege = SEC_PRIV_ENABLE_DELEGATION,
.delete_is_privileged = true,
.error_string = "Updating the UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION bit in userAccountControl is not permitted without the SeEnableDelegationPrivilege"
}
};
if (dsdb_module_am_system(ac->module)) {
return LDB_SUCCESS;
}
for (i = 0; i < ARRAY_SIZE(map); i++) {
if (user_account_control & map[i].uac) {
need_acl_check = true;
break;
}
}
if (need_acl_check == false) {
return LDB_SUCCESS;
}
user_token = acl_user_token(ac->module);
if (user_token == NULL) {
return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
ret = dsdb_module_search_dn(ac->module, ac, &res,
domain_dn,
sd_attrs,
DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
if (res->count != 1) {
return ldb_module_operr(ac->module);
}
ret = dsdb_get_sd_from_ldb_message(ldb,
ac, res->msgs[0], &domain_sd);
if (ret != LDB_SUCCESS) {
return ret;
}
for (i = 0; i < ARRAY_SIZE(map); i++) {
uint32_t this_uac_new = user_account_control & map[i].uac;
uint32_t this_uac_old = user_account_control_old & map[i].uac;
if (this_uac_new != this_uac_old) {
if (this_uac_old != 0) {
if (map[i].delete_is_privileged == false) {
continue;
}
}
if (map[i].oid) {
struct ldb_control *control = ldb_request_get_control(ac->req, map[i].oid);
if (control == NULL) {
ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
} else if (map[i].privilege != SEC_PRIV_INVALID) {
bool have_priv = security_token_has_privilege(user_token,
map[i].privilege);
if (have_priv == false) {
ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
} else if (map[i].priv_to_change_from & user_account_control_old) {
bool is_admin = security_token_has_builtin_administrators(user_token);
if (is_admin == false) {
ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
} else if (map[i].guid) {
ret = acl_check_extended_right(ac, domain_sd,
user_token,
map[i].guid,
SEC_ADS_CONTROL_ACCESS,
sid);
} else {
ret = LDB_SUCCESS;
}
if (ret != LDB_SUCCESS) {
break;
}
}
}
if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
switch (ac->req->operation) {
case LDB_ADD:
ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
"Failed to add %s: %s",
ldb_dn_get_linearized(ac->msg->dn),
map[i].error_string);
break;
case LDB_MODIFY:
ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
"Failed to modify %s: %s",
ldb_dn_get_linearized(ac->msg->dn),
map[i].error_string);
break;
default:
return ldb_module_operr(ac->module);
}
if (map[i].guid) {
dsdb_acl_debug(domain_sd, acl_user_token(ac->module),
domain_dn,
true,
10);
}
}
return ret;
}
static int samldb_check_user_account_control_rules(struct samldb_ctx *ac,
struct dom_sid *sid,
uint32_t req_uac,
uint32_t user_account_control,
uint32_t user_account_control_old)
{
int ret;
struct dsdb_control_password_user_account_control *uac = NULL;
ret = samldb_check_user_account_control_invariants(ac, user_account_control);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = samldb_check_user_account_control_acl(ac, sid, user_account_control, user_account_control_old);
if (ret != LDB_SUCCESS) {
return ret;
}
uac = talloc_zero(ac->req,
struct dsdb_control_password_user_account_control);
if (uac == NULL) {
return ldb_module_oom(ac->module);
}
uac->req_flags = req_uac;
uac->old_flags = user_account_control_old;
uac->new_flags = user_account_control;
ret = ldb_request_add_control(ac->req,
DSDB_CONTROL_PASSWORD_USER_ACCOUNT_CONTROL_OID,
false, uac);
if (ret != LDB_SUCCESS) {
return ret;
}
return ret;
}
/**
* This function is called on LDB modify operations. It performs some additions/
* replaces on the current LDB message when "userAccountControl" changes.
*/
static int samldb_user_account_control_change(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
uint32_t old_uac;
uint32_t new_uac;
uint32_t raw_uac;
uint32_t old_ufa;
uint32_t new_ufa;
uint32_t old_uac_computed;
uint32_t clear_uac;
uint32_t old_atype;
uint32_t new_atype;
uint32_t old_pgrid;
uint32_t new_pgrid;
NTTIME old_lockoutTime;
struct ldb_message_element *el;
struct ldb_val *val;
struct ldb_val computer_val;
struct ldb_message *tmp_msg;
struct dom_sid *sid;
int ret;
struct ldb_result *res;
const char * const attrs[] = {
"objectClass",
"isCriticalSystemObject",
"userAccountControl",
"msDS-User-Account-Control-Computed",
"lockoutTime",
"objectSid",
NULL
};
bool is_computer = false;
bool old_is_critical = false;
bool new_is_critical = false;
el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
ac->req->operation);
if (el == NULL || el->num_values == 0) {
ldb_asprintf_errstring(ldb,
"%08X: samldb: 'userAccountControl' can't be deleted!",
W_ERROR_V(WERR_DS_ILLEGAL_MOD_OPERATION));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* Create a temporary message for fetching the "userAccountControl" */
tmp_msg = ldb_msg_new(ac->msg);
if (tmp_msg == NULL) {
return ldb_module_oom(ac->module);
}
ret = ldb_msg_add(tmp_msg, el, 0);
if (ret != LDB_SUCCESS) {
return ret;
}
raw_uac = ldb_msg_find_attr_as_uint(tmp_msg,
"userAccountControl",
0);
talloc_free(tmp_msg);
/*
* UF_LOCKOUT, UF_PASSWD_CANT_CHANGE and UF_PASSWORD_EXPIRED
* are only generated and not stored. We ignore them almost
* completely, along with unknown bits and UF_SCRIPT.
*
* The only exception is ACB_AUTOLOCK, which features in
* clear_acb when the bit is cleared in this modify operation.
*
* MS-SAMR 2.2.1.13 UF_FLAG Codes states that some bits are
* ignored by clients and servers
*/
new_uac = raw_uac & UF_SETTABLE_BITS;
/* Fetch the old "userAccountControl" and "objectClass" */
ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
DSDB_FLAG_NEXT_MODULE, ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
old_uac = ldb_msg_find_attr_as_uint(res->msgs[0], "userAccountControl", 0);
if (old_uac == 0) {
return ldb_operr(ldb);
}
old_uac_computed = ldb_msg_find_attr_as_uint(res->msgs[0],
"msDS-User-Account-Control-Computed", 0);
old_lockoutTime = ldb_msg_find_attr_as_int64(res->msgs[0],
"lockoutTime", 0);
old_is_critical = ldb_msg_find_attr_as_bool(res->msgs[0],
"isCriticalSystemObject", 0);
/* When we do not have objectclass "computer" we cannot switch to a (read-only) DC */
el = ldb_msg_find_element(res->msgs[0], "objectClass");
if (el == NULL) {
return ldb_operr(ldb);
}
computer_val = data_blob_string_const("computer");
val = ldb_msg_find_val(el, &computer_val);
if (val != NULL) {
is_computer = true;
}
old_ufa = old_uac & UF_ACCOUNT_TYPE_MASK;
old_atype = ds_uf2atype(old_ufa);
old_pgrid = ds_uf2prim_group_rid(old_uac);
new_ufa = new_uac & UF_ACCOUNT_TYPE_MASK;
if (new_ufa == 0) {
/*
* "userAccountControl" = 0 or missing one of the
* types means "UF_NORMAL_ACCOUNT". See MS-SAMR
* 3.1.1.8.10 point 8
*/
new_ufa = UF_NORMAL_ACCOUNT;
new_uac |= new_ufa;
}
sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
if (sid == NULL) {
return ldb_module_operr(ac->module);
}
ret = samldb_check_user_account_control_rules(ac, sid,
raw_uac,
new_uac,
old_uac);
if (ret != LDB_SUCCESS) {
return ret;
}
new_atype = ds_uf2atype(new_ufa);
new_pgrid = ds_uf2prim_group_rid(new_uac);
clear_uac = (old_uac | old_uac_computed) & ~raw_uac;
switch (new_ufa) {
case UF_NORMAL_ACCOUNT:
new_is_critical = old_is_critical;
break;
case UF_INTERDOMAIN_TRUST_ACCOUNT:
new_is_critical = true;
break;
case UF_WORKSTATION_TRUST_ACCOUNT:
new_is_critical = false;
if (new_uac & UF_PARTIAL_SECRETS_ACCOUNT) {
if (!is_computer) {
ldb_asprintf_errstring(ldb,
"%08X: samldb: UF_PARTIAL_SECRETS_ACCOUNT "
"requires objectclass 'computer'!",
W_ERROR_V(WERR_DS_MACHINE_ACCOUNT_CREATED_PRENT4));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
new_is_critical = true;
}
break;
case UF_SERVER_TRUST_ACCOUNT:
if (!is_computer) {
ldb_asprintf_errstring(ldb,
"%08X: samldb: UF_SERVER_TRUST_ACCOUNT "
"requires objectclass 'computer'!",
W_ERROR_V(WERR_DS_MACHINE_ACCOUNT_CREATED_PRENT4));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
new_is_critical = true;
break;
default:
ldb_asprintf_errstring(ldb,
"%08X: samldb: invalid userAccountControl[0x%08X]",
W_ERROR_V(WERR_INVALID_PARAMETER), raw_uac);
return LDB_ERR_OTHER;
}
if (old_atype != new_atype) {
ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
"sAMAccountType", new_atype);
if (ret != LDB_SUCCESS) {
return ret;
}
el = ldb_msg_find_element(ac->msg, "sAMAccountType");
el->flags = LDB_FLAG_MOD_REPLACE;
}
/* As per MS-SAMR 3.1.1.8.10 these flags have not to be set */
if ((clear_uac & UF_LOCKOUT) && (old_lockoutTime != 0)) {
/* "lockoutTime" reset as per MS-SAMR 3.1.1.8.10 */
ldb_msg_remove_attr(ac->msg, "lockoutTime");
ret = samdb_msg_add_uint64(ldb, ac->msg, ac->msg, "lockoutTime",
(NTTIME)0);
if (ret != LDB_SUCCESS) {
return ret;
}
el = ldb_msg_find_element(ac->msg, "lockoutTime");
el->flags = LDB_FLAG_MOD_REPLACE;
}
/* "isCriticalSystemObject" might be set/changed */
if (old_is_critical != new_is_critical) {
ret = ldb_msg_add_string(ac->msg, "isCriticalSystemObject",
new_is_critical ? "TRUE": "FALSE");
if (ret != LDB_SUCCESS) {
return ret;
}
el = ldb_msg_find_element(ac->msg,
"isCriticalSystemObject");
el->flags = LDB_FLAG_MOD_REPLACE;
}
if (!ldb_msg_find_element(ac->msg, "primaryGroupID") &&
(old_pgrid != new_pgrid)) {
/* Older AD deployments don't know about the RODC group */
if (new_pgrid == DOMAIN_RID_READONLY_DCS) {
ret = samldb_prim_group_tester(ac, new_pgrid);
if (ret != LDB_SUCCESS) {
return ret;
}
}
ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
"primaryGroupID", new_pgrid);
if (ret != LDB_SUCCESS) {
return ret;
}
el = ldb_msg_find_element(ac->msg,
"primaryGroupID");
el->flags = LDB_FLAG_MOD_REPLACE;
}
/* Propagate eventual "userAccountControl" attribute changes */
if (old_uac != new_uac) {
char *tempstr = talloc_asprintf(ac->msg, "%d",
new_uac);
if (tempstr == NULL) {
return ldb_module_oom(ac->module);
}
/* Overwrite "userAccountControl" correctly */
el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl",
ac->req->operation);
el->values[0].data = (uint8_t *) tempstr;
el->values[0].length = strlen(tempstr);
} else {
ldb_msg_remove_attr(ac->msg, "userAccountControl");
}
return LDB_SUCCESS;
}
static int samldb_check_pwd_last_set_acl(struct samldb_ctx *ac,
struct dom_sid *sid)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
int ret = 0;
struct ldb_result *res = NULL;
const char * const sd_attrs[] = {"ntSecurityDescriptor", NULL};
struct security_token *user_token = NULL;
struct security_descriptor *domain_sd = NULL;
struct ldb_dn *domain_dn = ldb_get_default_basedn(ldb_module_get_ctx(ac->module));
const char *operation = "";
if (dsdb_module_am_system(ac->module)) {
return LDB_SUCCESS;
}
switch (ac->req->operation) {
case LDB_ADD:
operation = "add";
break;
case LDB_MODIFY:
operation = "modify";
break;
default:
return ldb_module_operr(ac->module);
}
user_token = acl_user_token(ac->module);
if (user_token == NULL) {
return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
ret = dsdb_module_search_dn(ac->module, ac, &res,
domain_dn,
sd_attrs,
DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
if (res->count != 1) {
return ldb_module_operr(ac->module);
}
ret = dsdb_get_sd_from_ldb_message(ldb, ac, res->msgs[0], &domain_sd);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = acl_check_extended_right(ac, domain_sd,
user_token,
GUID_DRS_UNEXPIRE_PASSWORD,
SEC_ADS_CONTROL_ACCESS,
sid);
if (ret != LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
return ret;
}
ldb_debug_set(ldb, LDB_DEBUG_WARNING,
"Failed to %s %s: "
"Setting pwdLastSet to -1 requires the "
"Unexpire-Password right that was not given "
"on the Domain object",
operation,
ldb_dn_get_linearized(ac->msg->dn));
dsdb_acl_debug(domain_sd, user_token,
domain_dn, true, 10);
return ret;
}
/**
* This function is called on LDB modify operations. It performs some additions/
* replaces on the current LDB message when "pwdLastSet" changes.
*/
static int samldb_pwd_last_set_change(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
NTTIME last_set = 0;
struct ldb_message_element *el = NULL;
struct ldb_message *tmp_msg = NULL;
struct dom_sid *self_sid = NULL;
int ret;
struct ldb_result *res = NULL;
const char * const attrs[] = {
"objectSid",
NULL
};
el = dsdb_get_single_valued_attr(ac->msg, "pwdLastSet",
ac->req->operation);
if (el == NULL || el->num_values == 0) {
ldb_asprintf_errstring(ldb,
"%08X: samldb: 'pwdLastSet' can't be deleted!",
W_ERROR_V(WERR_DS_ILLEGAL_MOD_OPERATION));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* Create a temporary message for fetching the "userAccountControl" */
tmp_msg = ldb_msg_new(ac->msg);
if (tmp_msg == NULL) {
return ldb_module_oom(ac->module);
}
ret = ldb_msg_add(tmp_msg, el, 0);
if (ret != LDB_SUCCESS) {
return ret;
}
last_set = samdb_result_nttime(tmp_msg, "pwdLastSet", 0);
talloc_free(tmp_msg);
/*
* Setting -1 (0xFFFFFFFFFFFFFFFF) requires the Unexpire-Password right
*/
if (last_set != UINT64_MAX) {
return LDB_SUCCESS;
}
/* Fetch the "objectSid" */
ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
DSDB_FLAG_NEXT_MODULE, ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
self_sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
if (self_sid == NULL) {
return ldb_module_operr(ac->module);
}
ret = samldb_check_pwd_last_set_acl(ac, self_sid);
if (ret != LDB_SUCCESS) {
return ret;
}
return LDB_SUCCESS;
}
static int samldb_lockout_time(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
NTTIME lockoutTime;
struct ldb_message_element *el;
struct ldb_message *tmp_msg;
int ret;
el = dsdb_get_single_valued_attr(ac->msg, "lockoutTime",
ac->req->operation);
if (el == NULL || el->num_values == 0) {
ldb_asprintf_errstring(ldb,
"%08X: samldb: 'lockoutTime' can't be deleted!",
W_ERROR_V(WERR_DS_ILLEGAL_MOD_OPERATION));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* Create a temporary message for fetching the "lockoutTime" */
tmp_msg = ldb_msg_new(ac->msg);
if (tmp_msg == NULL) {
return ldb_module_oom(ac->module);
}
ret = ldb_msg_add(tmp_msg, el, 0);
if (ret != LDB_SUCCESS) {
return ret;
}
lockoutTime = ldb_msg_find_attr_as_int64(tmp_msg,
"lockoutTime",
0);
talloc_free(tmp_msg);
if (lockoutTime != 0) {
return LDB_SUCCESS;
}
/* lockoutTime == 0 resets badPwdCount */
ldb_msg_remove_attr(ac->msg, "badPwdCount");
ret = samdb_msg_add_int(ldb, ac->msg, ac->msg,
"badPwdCount", 0);
if (ret != LDB_SUCCESS) {
return ret;
}
el = ldb_msg_find_element(ac->msg, "badPwdCount");
el->flags = LDB_FLAG_MOD_REPLACE;
return LDB_SUCCESS;
}
static int samldb_group_type_change(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
uint32_t group_type, old_group_type, account_type;
struct ldb_message_element *el;
struct ldb_message *tmp_msg;
int ret;
struct ldb_result *res;
const char * const attrs[] = { "groupType", NULL };
el = dsdb_get_single_valued_attr(ac->msg, "groupType",
ac->req->operation);
if (el == NULL) {
/* we are not affected */
return LDB_SUCCESS;
}
/* Create a temporary message for fetching the "groupType" */
tmp_msg = ldb_msg_new(ac->msg);
if (tmp_msg == NULL) {
return ldb_module_oom(ac->module);
}
ret = ldb_msg_add(tmp_msg, el, 0);
if (ret != LDB_SUCCESS) {
return ret;
}
group_type = ldb_msg_find_attr_as_uint(tmp_msg, "groupType", 0);
talloc_free(tmp_msg);
ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, attrs,
DSDB_FLAG_NEXT_MODULE |
DSDB_SEARCH_SHOW_DELETED, ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
old_group_type = ldb_msg_find_attr_as_uint(res->msgs[0], "groupType", 0);
if (old_group_type == 0) {
return ldb_operr(ldb);
}
/* Group type switching isn't so easy as it seems: We can only
* change in this directions: global <-> universal <-> local
* On each step also the group type itself
* (security/distribution) is variable. */
if (ldb_request_get_control(ac->req, LDB_CONTROL_PROVISION_OID) == NULL) {
switch (group_type) {
case GTYPE_SECURITY_GLOBAL_GROUP:
case GTYPE_DISTRIBUTION_GLOBAL_GROUP:
/* change to "universal" allowed */
if ((old_group_type == GTYPE_SECURITY_DOMAIN_LOCAL_GROUP) ||
(old_group_type == GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP)) {
ldb_set_errstring(ldb,
"samldb: Change from security/distribution local group forbidden!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
break;
case GTYPE_SECURITY_UNIVERSAL_GROUP:
case GTYPE_DISTRIBUTION_UNIVERSAL_GROUP:
/* each change allowed */
break;
case GTYPE_SECURITY_DOMAIN_LOCAL_GROUP:
case GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP:
/* change to "universal" allowed */
if ((old_group_type == GTYPE_SECURITY_GLOBAL_GROUP) ||
(old_group_type == GTYPE_DISTRIBUTION_GLOBAL_GROUP)) {
ldb_set_errstring(ldb,
"samldb: Change from security/distribution global group forbidden!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
break;
case GTYPE_SECURITY_BUILTIN_LOCAL_GROUP:
default:
/* we don't allow this "groupType" values */
return LDB_ERR_UNWILLING_TO_PERFORM;
break;
}
}
account_type = ds_gtype2atype(group_type);
if (account_type == 0) {
ldb_set_errstring(ldb, "samldb: Unrecognized account type!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType",
account_type);
if (ret != LDB_SUCCESS) {
return ret;
}
el = ldb_msg_find_element(ac->msg, "sAMAccountType");
el->flags = LDB_FLAG_MOD_REPLACE;
return LDB_SUCCESS;
}
static int samldb_member_check(struct samldb_ctx *ac)
{
const char * const attrs[] = { "objectSid", NULL };
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
struct ldb_message_element *el;
struct ldb_dn *member_dn;
struct dom_sid *sid;
struct ldb_result *res;
struct dom_sid *group_sid;
unsigned int i, j;
int ret;
/* Fetch information from the existing object */
ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
if (res->count != 1) {
return ldb_operr(ldb);
}
group_sid = samdb_result_dom_sid(res, res->msgs[0], "objectSid");
if (group_sid == NULL) {
return ldb_operr(ldb);
}
/* We've to walk over all modification entries and consider the "member"
* ones. */
for (i = 0; i < ac->msg->num_elements; i++) {
if (ldb_attr_cmp(ac->msg->elements[i].name, "member") != 0) {
continue;
}
el = &ac->msg->elements[i];
for (j = 0; j < el->num_values; j++) {
struct ldb_result *group_res;
const char *group_attrs[] = { "primaryGroupID" , NULL };
uint32_t prim_group_rid;
if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE) {
/* Deletes will be handled in
* repl_meta_data, and deletes not
* matching a member will return
* LDB_ERR_UNWILLING_TO_PERFORM
* there */
continue;
}
member_dn = ldb_dn_from_ldb_val(ac, ldb,
&el->values[j]);
if (!ldb_dn_validate(member_dn)) {
return ldb_operr(ldb);
}
/* Denies to add "member"s to groups which are primary
* ones for them - in this case return
* ERR_ENTRY_ALREADY_EXISTS. */
ret = dsdb_module_search_dn(ac->module, ac, &group_res,
member_dn, group_attrs,
DSDB_FLAG_NEXT_MODULE, ac->req);
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
/* member DN doesn't exist yet */
continue;
}
if (ret != LDB_SUCCESS) {
return ret;
}
prim_group_rid = ldb_msg_find_attr_as_uint(group_res->msgs[0], "primaryGroupID", (uint32_t)-1);
if (prim_group_rid == (uint32_t) -1) {
/* the member hasn't to be a user account ->
* therefore no check needed in this case. */
continue;
}
sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb),
prim_group_rid);
if (sid == NULL) {
return ldb_operr(ldb);
}
if (dom_sid_equal(group_sid, sid)) {
ldb_asprintf_errstring(ldb,
"samldb: member %s already set via primaryGroupID %u",
ldb_dn_get_linearized(member_dn), prim_group_rid);
return LDB_ERR_ENTRY_ALREADY_EXISTS;
}
}
}
talloc_free(res);
return LDB_SUCCESS;
}
/* SAM objects have special rules regarding the "description" attribute on
* modify operations. */
static int samldb_description_check(struct samldb_ctx *ac, bool *modified)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
const char * const attrs[] = { "objectClass", "description", NULL };
struct ldb_result *res;
unsigned int i;
int ret;
/* Fetch information from the existing object */
ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED, ac->req,
"(|(objectclass=user)(objectclass=group)(objectclass=samDomain)(objectclass=samServer))");
if (ret != LDB_SUCCESS) {
/* don't treat it specially ... let normal error codes
happen from other places */
ldb_reset_err_string(ldb);
return LDB_SUCCESS;
}
if (res->count == 0) {
/* we didn't match the filter */
talloc_free(res);
return LDB_SUCCESS;
}
/* We've to walk over all modification entries and consider the
* "description" ones. */
for (i = 0; i < ac->msg->num_elements; i++) {
if (ldb_attr_cmp(ac->msg->elements[i].name, "description") == 0) {
ac->msg->elements[i].flags |= LDB_FLAG_INTERNAL_FORCE_SINGLE_VALUE_CHECK;
*modified = true;
}
}
talloc_free(res);
return LDB_SUCCESS;
}
/* This trigger adapts the "servicePrincipalName" attributes if the
* "dNSHostName" and/or "sAMAccountName" attribute change(s) */
static int samldb_service_principal_names_change(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
struct ldb_message_element *el = NULL, *el2 = NULL;
struct ldb_message *msg;
const char * const attrs[] = { "servicePrincipalName", NULL };
struct ldb_result *res;
const char *dns_hostname = NULL, *old_dns_hostname = NULL,
*sam_accountname = NULL, *old_sam_accountname = NULL;
unsigned int i, j;
int ret;
el = dsdb_get_single_valued_attr(ac->msg, "dNSHostName",
ac->req->operation);
el2 = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName",
ac->req->operation);
if ((el == NULL) && (el2 == NULL)) {
/* we are not affected */
return LDB_SUCCESS;
}
/* Create a temporary message for fetching the "dNSHostName" */
if (el != NULL) {
const char *dns_attrs[] = { "dNSHostName", NULL };
msg = ldb_msg_new(ac->msg);
if (msg == NULL) {
return ldb_module_oom(ac->module);
}
ret = ldb_msg_add(msg, el, 0);
if (ret != LDB_SUCCESS) {
return ret;
}
dns_hostname = talloc_strdup(ac,
ldb_msg_find_attr_as_string(msg, "dNSHostName", NULL));
if (dns_hostname == NULL) {
return ldb_module_oom(ac->module);
}
talloc_free(msg);
ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn,
dns_attrs, DSDB_FLAG_NEXT_MODULE, ac->req);
if (ret == LDB_SUCCESS) {
old_dns_hostname = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
}
}
/* Create a temporary message for fetching the "sAMAccountName" */
if (el2 != NULL) {
char *tempstr, *tempstr2 = NULL;
const char *acct_attrs[] = { "sAMAccountName", NULL };
msg = ldb_msg_new(ac->msg);
if (msg == NULL) {
return ldb_module_oom(ac->module);
}
ret = ldb_msg_add(msg, el2, 0);
if (ret != LDB_SUCCESS) {
return ret;
}
tempstr = talloc_strdup(ac,
ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
talloc_free(msg);
ret = dsdb_module_search_dn(ac->module, ac, &res, ac->msg->dn, acct_attrs,
DSDB_FLAG_NEXT_MODULE, ac->req);
if (ret == LDB_SUCCESS) {
tempstr2 = talloc_strdup(ac,
ldb_msg_find_attr_as_string(res->msgs[0],
"sAMAccountName", NULL));
}
/* The "sAMAccountName" needs some additional trimming: we need
* to remove the trailing "$"s if they exist. */
if ((tempstr != NULL) && (tempstr[0] != '\0') &&
(tempstr[strlen(tempstr) - 1] == '$')) {
tempstr[strlen(tempstr) - 1] = '\0';
}
if ((tempstr2 != NULL) && (tempstr2[0] != '\0') &&
(tempstr2[strlen(tempstr2) - 1] == '$')) {
tempstr2[strlen(tempstr2) - 1] = '\0';
}
sam_accountname = tempstr;
old_sam_accountname = tempstr2;
}
if (old_dns_hostname == NULL) {
/* we cannot change when the old name is unknown */
dns_hostname = NULL;
}
if ((old_dns_hostname != NULL) && (dns_hostname != NULL) &&
(strcasecmp_m(old_dns_hostname, dns_hostname) == 0)) {
/* The "dNSHostName" didn't change */
dns_hostname = NULL;
}
if (old_sam_accountname == NULL) {
/* we cannot change when the old name is unknown */
sam_accountname = NULL;
}
if ((old_sam_accountname != NULL) && (sam_accountname != NULL) &&
(strcasecmp_m(old_sam_accountname, sam_accountname) == 0)) {
/* The "sAMAccountName" didn't change */
sam_accountname = NULL;
}
if ((dns_hostname == NULL) && (sam_accountname == NULL)) {
/* Well, there are information missing (old name(s)) or the
* names didn't change. We've nothing to do and can exit here */
return LDB_SUCCESS;
}
/* Potential "servicePrincipalName" changes in the same request have to
* be handled before the update (Windows behaviour). */
el = ldb_msg_find_element(ac->msg, "servicePrincipalName");
if (el != NULL) {
msg = ldb_msg_new(ac->msg);
if (msg == NULL) {
return ldb_module_oom(ac->module);
}
msg->dn = ac->msg->dn;
do {
ret = ldb_msg_add(msg, el, el->flags);
if (ret != LDB_SUCCESS) {
return ret;
}
ldb_msg_remove_element(ac->msg, el);
el = ldb_msg_find_element(ac->msg,
"servicePrincipalName");
} while (el != NULL);
ret = dsdb_module_modify(ac->module, msg,
DSDB_FLAG_NEXT_MODULE, ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
talloc_free(msg);
}
/* Fetch the "servicePrincipalName"s if any */
ret = dsdb_module_search(ac->module, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
DSDB_FLAG_NEXT_MODULE, ac->req, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
if ((res->count != 1) || (res->msgs[0]->num_elements > 1)) {
return ldb_operr(ldb);
}
if (res->msgs[0]->num_elements == 1) {
/*
* Yes, we do have "servicePrincipalName"s. First we update them
* locally, that means we do always substitute the current
* "dNSHostName" with the new one and/or "sAMAccountName"
* without "$" with the new one and then we append the
* modified "servicePrincipalName"s as a message element
* replace to the modification request (Windows behaviour). We
* need also to make sure that the values remain case-
* insensitively unique.
*/
ret = ldb_msg_add_empty(ac->msg, "servicePrincipalName",
LDB_FLAG_MOD_REPLACE, &el);
if (ret != LDB_SUCCESS) {
return ret;
}
for (i = 0; i < res->msgs[0]->elements[0].num_values; i++) {
char *old_str, *new_str;
char *pos = NULL;
const char *tok;
struct ldb_val *vals;
bool found = false;
old_str = (char *)
res->msgs[0]->elements[0].values[i].data;
new_str = talloc_strdup(ac->msg,
strtok_r(old_str, "/", &pos));
if (new_str == NULL) {
return ldb_module_oom(ac->module);
}
while ((tok = strtok_r(NULL, "/", &pos)) != NULL) {
if ((dns_hostname != NULL) &&
(strcasecmp_m(tok, old_dns_hostname) == 0)) {
tok = dns_hostname;
}
if ((sam_accountname != NULL) &&
(strcasecmp_m(tok, old_sam_accountname) == 0)) {
tok = sam_accountname;
}
new_str = talloc_asprintf(ac->msg, "%s/%s",
new_str, tok);
if (new_str == NULL) {
return ldb_module_oom(ac->module);
}
}
/* Uniqueness check */
for (j = 0; (!found) && (j < el->num_values); j++) {
if (strcasecmp_m((char *)el->values[j].data,
new_str) == 0) {
found = true;
}
}
if (found) {
continue;
}
/*
* append the new "servicePrincipalName" -
* code derived from ldb_msg_add_value().
*
* Open coded to make it clear that we must
* append to the MOD_REPLACE el created above.
*/
vals = talloc_realloc(ac->msg, el->values,
struct ldb_val,
el->num_values + 1);
if (vals == NULL) {
return ldb_module_oom(ac->module);
}
el->values = vals;
el->values[el->num_values] = data_blob_string_const(new_str);
++(el->num_values);
}
}
talloc_free(res);
return LDB_SUCCESS;
}
/* This checks the "fSMORoleOwner" attributes */
static int samldb_fsmo_role_owner_check(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
const char * const no_attrs[] = { NULL };
struct ldb_message_element *el;
struct ldb_message *tmp_msg;
struct ldb_dn *res_dn;
struct ldb_result *res;
int ret;
el = dsdb_get_single_valued_attr(ac->msg, "fSMORoleOwner",
ac->req->operation);
if (el == NULL) {
/* we are not affected */
return LDB_SUCCESS;
}
/* Create a temporary message for fetching the "fSMORoleOwner" */
tmp_msg = ldb_msg_new(ac->msg);
if (tmp_msg == NULL) {
return ldb_module_oom(ac->module);
}
ret = ldb_msg_add(tmp_msg, el, 0);
if (ret != LDB_SUCCESS) {
return ret;
}
res_dn = ldb_msg_find_attr_as_dn(ldb, ac, tmp_msg, "fSMORoleOwner");
talloc_free(tmp_msg);
if (res_dn == NULL) {
ldb_set_errstring(ldb,
"samldb: 'fSMORoleOwner' attributes have to reference 'nTDSDSA' entries!");
if (ac->req->operation == LDB_ADD) {
return LDB_ERR_CONSTRAINT_VIOLATION;
} else {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
}
/* Fetched DN has to reference a "nTDSDSA" entry */
ret = dsdb_module_search(ac->module, ac, &res, res_dn, LDB_SCOPE_BASE,
no_attrs,
DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
ac->req, "(objectClass=nTDSDSA)");
if (ret != LDB_SUCCESS) {
return ret;
}
if (res->count != 1) {
ldb_set_errstring(ldb,
"samldb: 'fSMORoleOwner' attributes have to reference 'nTDSDSA' entries!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
talloc_free(res);
return LDB_SUCCESS;
}
/*
* Return zero if the number of zero bits in the address (looking from low to
* high) is equal to or greater than the length minus the mask. Otherwise it
* returns -1.
*/
static int check_cidr_zero_bits(uint8_t *address, unsigned int len,
unsigned int mask)
{
/* <address> is an integer in big-endian form, <len> bits long. All
bits between <mask> and <len> must be zero. */
int i;
unsigned int byte_len;
unsigned int byte_mask;
unsigned int bit_mask;
if (len == 32) {
DBG_INFO("Looking at address %02x%02x%02x%02x, mask %u\n",
address[0], address[1], address[2], address[3],
mask);
} else if (len == 128){
DBG_INFO("Looking at address "
"%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x-%02x%02x-%02x%02x-%02x%02x, mask %u\n",
address[0], address[1], address[2], address[3],
address[4], address[5], address[6], address[7],
address[8], address[9], address[10], address[11],
address[12], address[13], address[14], address[15],
mask);
}
if (mask > len){
DBG_INFO("mask %u is too big (> %u)\n", mask, len);
return -1;
}
if (mask == len){
/* single address subnet.
* In IPv4 all 255s is invalid by the bitmask != address rule
* in MS-ADTS. IPv6 does not suffer.
*/
if (len == 32){
if (address[0] == 255 &&
address[1] == 255 &&
address[2] == 255 &&
address[3] == 255){
return -1;
}
}
return 0;
}
byte_len = len / 8;
byte_mask = mask / 8;
for (i = byte_len - 1; i > byte_mask; i--){
DBG_DEBUG("checking byte %d %02x\n", i, address[i]);
if (address[i] != 0){
return -1;
}
}
bit_mask = (1 << (8 - (mask & 7))) - 1;
DBG_DEBUG("checking bitmask %02x & %02x overlap %02x\n", bit_mask, address[byte_mask],
bit_mask & address[byte_mask]);
if (address[byte_mask] & bit_mask){
return -1;
}
/* According to MS-ADTS, the mask can't exactly equal the bitmask for
* IPv4 (but this is fine for v6). That is 255.255.80.0/17 is bad,
* because the bitmask implied by "/17" is 255.255.80.0.
*
* The bit_mask used in the previous check is the complement of what
* we want here.
*/
if (len == 32 && address[byte_mask] == (uint8_t)~bit_mask){
bool ok = false;
for (i = 0; i < byte_mask; i++){
if (address[i] != 255){
ok = true;
break;
}
}
if (ok == false){
return -1;
}
}
return 0;
}
static int check_address_roundtrip(const char *address, int family,
const uint8_t *address_bytes,
char *buffer, int buffer_len)
{
/*
* Check that the address is in the canonical RFC5952 format for IPv6,
* and lacks extra leading zeros for each dotted decimal for IPv4.
* Handily this is what inet_ntop() gives you.
*/
const char *address_redux = inet_ntop(family, address_bytes,
buffer, buffer_len);
if (address_redux == NULL){
DBG_INFO("Address round trip %s failed unexpectedly"
" with errno %d\n", address, errno);
return -1;
}
if (strcasecmp(address, address_redux) != 0){
DBG_INFO("Address %s round trips to %s; fail!\n",
address, address_redux);
/* If the address family is IPv6, and the address is in a
certain range
*/
if (strchr(address_redux, '.') != NULL){
DEBUG(0, ("The IPv6 address '%s' has the misfortune of "
"lying in a range that was once used for "
"IPv4 embedding (that is, it might also be "
"represented as '%s').\n", address,
address_redux));
}
return -1;
}
return 0;
}
/*
* MS-ADTS v20150630 6.1.1.2.2.2.1 Subnet Object, refers to RFC1166 and
* RFC2373. It specifies something seemingly indistinguishable from an RFC4632
* CIDR address range without saying so explicitly. Here we follow the CIDR
* spec.
*
* Return 0 on success, -1 on error.
*/
static int verify_cidr(const char *cidr)
{
char *address = NULL, *slash = NULL;
bool has_colon, has_dot;
int res, ret;
unsigned long mask;
uint8_t *address_bytes = NULL;
char *address_redux = NULL;
unsigned int address_len;
TALLOC_CTX *frame = NULL;
int error = 0;
DBG_DEBUG("CIDR is %s\n", cidr);
frame = talloc_stackframe();
address = talloc_strdup(frame, cidr);
if (address == NULL){
goto error;
}
/* there must be a '/' */
slash = strchr(address, '/');
if (slash == NULL){
goto error;
}
/* terminate the address for strchr, inet_pton */
*slash = '\0';
mask = smb_strtoul(slash + 1, NULL, 10, &error, SMB_STR_FULL_STR_CONV);
if (mask == 0){
DBG_INFO("Windows does not like the zero mask, "
"so nor do we: %s\n", cidr);
goto error;
}
if (error != 0){
DBG_INFO("CIDR mask is not a proper integer: %s\n", cidr);
goto error;
}
address_bytes = talloc_size(frame, sizeof(struct in6_addr));
if (address_bytes == NULL){
goto error;
}
address_redux = talloc_size(frame, INET6_ADDRSTRLEN);
if (address_redux == NULL){
goto error;
}
DBG_INFO("found address %s, mask %lu\n", address, mask);
has_colon = (strchr(address, ':') == NULL) ? false : true;
has_dot = (strchr(address, '.') == NULL) ? false : true;
if (has_dot && has_colon){
/* This seems to be an IPv4 address embedded in IPv6, which is
icky. We don't support it. */
DBG_INFO("Refusing to consider cidr '%s' with dots and colons\n",
cidr);
goto error;
} else if (has_colon){ /* looks like IPv6 */
res = inet_pton(AF_INET6, address, address_bytes);
if (res != 1) {
DBG_INFO("Address in %s fails to parse as IPv6\n", cidr);
goto error;
}
address_len = 128;
if (check_address_roundtrip(address, AF_INET6, address_bytes,
address_redux, INET6_ADDRSTRLEN)){
goto error;
}
} else if (has_dot) {
/* looks like IPv4 */
if (strcmp(address, "0.0.0.0") == 0){
DBG_INFO("Windows does not like the zero IPv4 address, "
"so nor do we.\n");
goto error;
}
res = inet_pton(AF_INET, address, address_bytes);
if (res != 1) {
DBG_INFO("Address in %s fails to parse as IPv4\n", cidr);
goto error;
}
address_len = 32;
if (check_address_roundtrip(address, AF_INET, address_bytes,
address_redux, INET_ADDRSTRLEN)){
goto error;
}
} else {
/* This doesn't look like an IP address at all. */
goto error;
}
ret = check_cidr_zero_bits(address_bytes, address_len, mask);
talloc_free(frame);
return ret;
error:
talloc_free(frame);
return -1;
}
static int samldb_verify_subnet(struct samldb_ctx *ac, struct ldb_dn *dn)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
const char *cidr = NULL;
const struct ldb_val *rdn_value = NULL;
rdn_value = ldb_dn_get_rdn_val(dn);
if (rdn_value == NULL) {
ldb_set_errstring(ldb, "samldb: ldb_dn_get_rdn_val "
"failed");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
cidr = ldb_dn_escape_value(ac, *rdn_value);
DBG_INFO("looking at cidr '%s'\n", cidr);
if (cidr == NULL) {
ldb_set_errstring(ldb,
"samldb: adding an empty subnet cidr seems wrong");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
if (verify_cidr(cidr)){
ldb_set_errstring(ldb,
"samldb: subnet value is invalid");
return LDB_ERR_INVALID_DN_SYNTAX;
}
return LDB_SUCCESS;
}
static char *refer_if_rodc(struct ldb_context *ldb, struct ldb_request *req,
struct ldb_dn *dn)
{
bool rodc = false;
struct loadparm_context *lp_ctx;
char *referral;
int ret;
WERROR err;
if (ldb_request_get_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID) ||
ldb_request_get_control(req, DSDB_CONTROL_DBCHECK_MODIFY_RO_REPLICA)) {
return NULL;
}
ret = samdb_rodc(ldb, &rodc);
if (ret != LDB_SUCCESS) {
DEBUG(4, (__location__ ": unable to tell if we are an RODC\n"));
return NULL;
}
if (rodc) {
const char *domain = NULL;
struct ldb_dn *fsmo_role_dn;
struct ldb_dn *role_owner_dn;
ldb_set_errstring(ldb, "RODC modify is forbidden!");
lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
struct loadparm_context);
err = dsdb_get_fsmo_role_info(req, ldb, DREPL_PDC_MASTER,
&fsmo_role_dn, &role_owner_dn);
if (W_ERROR_IS_OK(err)) {
struct ldb_dn *server_dn = ldb_dn_copy(req, role_owner_dn);
if (server_dn != NULL) {
ldb_dn_remove_child_components(server_dn, 1);
domain = samdb_dn_to_dnshostname(ldb, req,
server_dn);
}
}
if (domain == NULL) {
domain = lpcfg_dnsdomain(lp_ctx);
}
referral = talloc_asprintf(req,
"ldap://%s/%s",
domain,
ldb_dn_get_linearized(dn));
return referral;
}
return NULL;
}
/* add */
static int samldb_add(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct samldb_ctx *ac;
struct ldb_message_element *el;
int ret;
char *referral = NULL;
ldb = ldb_module_get_ctx(module);
ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n");
/* do not manipulate our control entries */
if (ldb_dn_is_special(req->op.add.message->dn)) {
return ldb_next_request(module, req);
}
referral = refer_if_rodc(ldb, req, req->op.add.message->dn);
if (referral != NULL) {
ret = ldb_module_send_referral(req, referral);
return ret;
}
el = ldb_msg_find_element(req->op.add.message, "userParameters");
if (el != NULL && ldb_req_is_untrusted(req)) {
const char *reason = "samldb_add: "
"setting userParameters is not supported over LDAP, "
"see https://bugzilla.samba.org/show_bug.cgi?id=8077";
ldb_debug(ldb, LDB_DEBUG_WARNING, "%s", reason);
return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, reason);
}
ac = samldb_ctx_init(module, req);
if (ac == NULL) {
return ldb_operr(ldb);
}
/* build the new msg */
ac->msg = ldb_msg_copy_shallow(ac, req->op.add.message);
if (ac->msg == NULL) {
talloc_free(ac);
ldb_debug(ldb, LDB_DEBUG_FATAL,
"samldb_add: ldb_msg_copy_shallow failed!\n");
return ldb_operr(ldb);
}
el = ldb_msg_find_element(ac->msg, "fSMORoleOwner");
if (el != NULL) {
ret = samldb_fsmo_role_owner_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
if (samdb_find_attribute(ldb, ac->msg,
"objectclass", "user") != NULL) {
ac->type = SAMLDB_TYPE_USER;
ret = samldb_prim_group_trigger(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = samldb_objectclass_trigger(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
return samldb_fill_object(ac);
}
if (samdb_find_attribute(ldb, ac->msg,
"objectclass", "group") != NULL) {
ac->type = SAMLDB_TYPE_GROUP;
ret = samldb_objectclass_trigger(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
return samldb_fill_object(ac);
}
/* perhaps a foreignSecurityPrincipal? */
if (samdb_find_attribute(ldb, ac->msg,
"objectclass",
"foreignSecurityPrincipal") != NULL) {
return samldb_fill_foreignSecurityPrincipal_object(ac);
}
if (samdb_find_attribute(ldb, ac->msg,
"objectclass", "classSchema") != NULL) {
ac->type = SAMLDB_TYPE_CLASS;
/* If in provision, these checks are too slow to do */
if (!ldb_request_get_control(req, DSDB_CONTROL_SKIP_DUPLICATES_CHECK_OID)) {
ret = samldb_schema_governsid_valid_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
ret = samldb_schema_ldapdisplayname_valid_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = samldb_schema_info_update(ac);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
return samldb_fill_object(ac);
}
if (samdb_find_attribute(ldb, ac->msg,
"objectclass", "attributeSchema") != NULL) {
ac->type = SAMLDB_TYPE_ATTRIBUTE;
/* If in provision, these checks are too slow to do */
if (!ldb_request_get_control(req, DSDB_CONTROL_SKIP_DUPLICATES_CHECK_OID)) {
ret = samldb_schema_attributeid_valid_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = samldb_schema_add_handle_linkid(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = samldb_schema_add_handle_mapiid(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
ret = samldb_schema_ldapdisplayname_valid_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = samldb_schema_info_update(ac);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
return samldb_fill_object(ac);
}
if (samdb_find_attribute(ldb, ac->msg,
"objectclass", "subnet") != NULL) {
ret = samldb_verify_subnet(ac, ac->msg->dn);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
/* We are just checking the value is valid, and there are no
values to fill in. */
}
talloc_free(ac);
/* nothing matched, go on */
return ldb_next_request(module, req);
}
/* modify */
static int samldb_modify(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct samldb_ctx *ac;
struct ldb_message_element *el, *el2;
struct ldb_control *is_undelete;
bool modified = false;
int ret;
if (ldb_dn_is_special(req->op.mod.message->dn)) {
/* do not manipulate our control entries */
return ldb_next_request(module, req);
}
ldb = ldb_module_get_ctx(module);
/*
* we are going to need some special handling if in Undelete call.
* Since tombstone_reanimate module will restore certain attributes,
* we need to relax checks for: sAMAccountType, primaryGroupID
*/
is_undelete = ldb_request_get_control(req, DSDB_CONTROL_RESTORE_TOMBSTONE_OID);
/* make sure that "objectSid" is not specified */
el = ldb_msg_find_element(req->op.mod.message, "objectSid");
if (el != NULL) {
if (ldb_request_get_control(req, LDB_CONTROL_PROVISION_OID) == NULL) {
ldb_set_errstring(ldb,
"samldb: objectSid must not be specified!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
}
if (is_undelete == NULL) {
/* make sure that "sAMAccountType" is not specified */
el = ldb_msg_find_element(req->op.mod.message, "sAMAccountType");
if (el != NULL) {
ldb_set_errstring(ldb,
"samldb: sAMAccountType must not be specified!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
}
/* make sure that "isCriticalSystemObject" is not specified */
el = ldb_msg_find_element(req->op.mod.message, "isCriticalSystemObject");
if (el != NULL) {
if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) == NULL) {
ldb_set_errstring(ldb,
"samldb: isCriticalSystemObject must not be specified!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
}
/* msDS-IntId is not allowed to be modified
* except when modification comes from replication */
if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) {
if (!ldb_request_get_control(req,
DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
return LDB_ERR_CONSTRAINT_VIOLATION;
}
}
el = ldb_msg_find_element(req->op.mod.message, "userParameters");
if (el != NULL && ldb_req_is_untrusted(req)) {
const char *reason = "samldb: "
"setting userParameters is not supported over LDAP, "
"see https://bugzilla.samba.org/show_bug.cgi?id=8077";
ldb_debug(ldb, LDB_DEBUG_WARNING, "%s", reason);
return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, reason);
}
ac = samldb_ctx_init(module, req);
if (ac == NULL) {
return ldb_operr(ldb);
}
/* build the new msg */
ac->msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
if (ac->msg == NULL) {
talloc_free(ac);
ldb_debug(ldb, LDB_DEBUG_FATAL,
"samldb_modify: ldb_msg_copy_shallow failed!\n");
return ldb_operr(ldb);
}
if (is_undelete == NULL) {
el = ldb_msg_find_element(ac->msg, "primaryGroupID");
if (el != NULL) {
ret = samldb_prim_group_trigger(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
}
el = ldb_msg_find_element(ac->msg, "userAccountControl");
if (el != NULL) {
modified = true;
ret = samldb_user_account_control_change(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
el = ldb_msg_find_element(ac->msg, "pwdLastSet");
if (el != NULL) {
modified = true;
ret = samldb_pwd_last_set_change(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
el = ldb_msg_find_element(ac->msg, "lockoutTime");
if (el != NULL) {
modified = true;
ret = samldb_lockout_time(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
el = ldb_msg_find_element(ac->msg, "groupType");
if (el != NULL) {
modified = true;
ret = samldb_group_type_change(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
el = ldb_msg_find_element(ac->msg, "sAMAccountName");
if (el != NULL) {
ret = samldb_sam_accountname_valid_check(ac);
/*
* Other errors are checked for elsewhere, we just
* want to prevent duplicates
*/
if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
return ret;
}
}
el = ldb_msg_find_element(ac->msg, "ldapDisplayName");
if (el != NULL) {
ret = samldb_schema_ldapdisplayname_valid_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
el = ldb_msg_find_element(ac->msg, "attributeID");
if (el != NULL) {
ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
"Once set, attributeID values may not be modified");
return LDB_ERR_CONSTRAINT_VIOLATION;
}
el = ldb_msg_find_element(ac->msg, "governsID");
if (el != NULL) {
ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
"Once set, governsID values may not be modified");
return LDB_ERR_CONSTRAINT_VIOLATION;
}
el = ldb_msg_find_element(ac->msg, "member");
if (el != NULL) {
struct ldb_control *fix_link_sid_ctrl = NULL;
fix_link_sid_ctrl = ldb_request_get_control(ac->req,
DSDB_CONTROL_DBCHECK_FIX_LINK_DN_SID);
if (fix_link_sid_ctrl == NULL) {
ret = samldb_member_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
}
el = ldb_msg_find_element(ac->msg, "description");
if (el != NULL) {
ret = samldb_description_check(ac, &modified);
if (ret != LDB_SUCCESS) {
return ret;
}
}
el = ldb_msg_find_element(ac->msg, "dNSHostName");
el2 = ldb_msg_find_element(ac->msg, "sAMAccountName");
if ((el != NULL) || (el2 != NULL)) {
modified = true;
ret = samldb_service_principal_names_change(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
el = ldb_msg_find_element(ac->msg, "fSMORoleOwner");
if (el != NULL) {
ret = samldb_fsmo_role_owner_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
if (modified) {
struct ldb_request *child_req;
/* Now perform the real modifications as a child request */
ret = ldb_build_mod_req(&child_req, ldb, ac,
ac->msg,
req->controls,
req, dsdb_next_callback,
req);
LDB_REQ_SET_LOCATION(child_req);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_next_request(module, child_req);
}
talloc_free(ac);
/* no change which interests us, go on */
return ldb_next_request(module, req);
}
/* delete */
static int samldb_prim_group_users_check(struct samldb_ctx *ac)
{
struct ldb_context *ldb;
struct dom_sid *sid;
uint32_t rid;
NTSTATUS status;
int ret;
struct ldb_result *res = NULL;
struct ldb_result *res_users = NULL;
const char * const attrs[] = { "objectSid", "isDeleted", NULL };
const char * const noattrs[] = { NULL };
ldb = ldb_module_get_ctx(ac->module);
/* Finds out the SID/RID of the SAM object */
ret = dsdb_module_search_dn(ac->module, ac, &res, ac->req->op.del.dn,
attrs,
DSDB_FLAG_NEXT_MODULE | DSDB_SEARCH_SHOW_DELETED,
ac->req);
if (ret != LDB_SUCCESS) {
return ret;
}
if (ldb_msg_check_string_attribute(res->msgs[0], "isDeleted", "TRUE")) {
return LDB_SUCCESS;
}
sid = samdb_result_dom_sid(ac, res->msgs[0], "objectSid");
if (sid == NULL) {
/* No SID - it might not be a SAM object - therefore ok */
return LDB_SUCCESS;
}
status = dom_sid_split_rid(ac, sid, NULL, &rid);
if (!NT_STATUS_IS_OK(status)) {
return ldb_operr(ldb);
}
if (rid == 0) {
/* Special object (security principal?) */
return LDB_SUCCESS;
}
/* do not allow deletion of well-known sids */
if (rid < DSDB_SAMDB_MINIMUM_ALLOWED_RID &&
(ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL)) {
return LDB_ERR_OTHER;
}
/* Deny delete requests from groups which are primary ones */
ret = dsdb_module_search(ac->module, ac, &res_users,
ldb_get_default_basedn(ldb),
LDB_SCOPE_SUBTREE, noattrs,
DSDB_FLAG_NEXT_MODULE,
ac->req,
"(&(primaryGroupID=%u)(objectClass=user))", rid);
if (ret != LDB_SUCCESS) {
return ret;
}
if (res_users->count > 0) {
ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
"Refusing to delete %s, as it "
"is still the primaryGroupID "
"for %u users",
ldb_dn_get_linearized(res->msgs[0]->dn),
res_users->count);
/*
* Yes, this seems very wrong, but we have a test
* for this exact error code in sam.py
*/
return LDB_ERR_ENTRY_ALREADY_EXISTS;
}
return LDB_SUCCESS;
}
static int samldb_delete(struct ldb_module *module, struct ldb_request *req)
{
struct samldb_ctx *ac;
char *referral = NULL;
int ret;
struct ldb_context *ldb;
if (ldb_dn_is_special(req->op.del.dn)) {
/* do not manipulate our control entries */
return ldb_next_request(module, req);
}
ldb = ldb_module_get_ctx(module);
referral = refer_if_rodc(ldb, req, req->op.del.dn);
if (referral != NULL) {
ret = ldb_module_send_referral(req, referral);
return ret;
}
ac = samldb_ctx_init(module, req);
if (ac == NULL) {
return ldb_operr(ldb_module_get_ctx(module));
}
ret = samldb_prim_group_users_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
talloc_free(ac);
return ldb_next_request(module, req);
}
/* rename */
static int check_rename_constraints(struct ldb_message *msg,
struct samldb_ctx *ac,
struct ldb_dn *olddn, struct ldb_dn *newdn)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
struct ldb_dn *dn1, *dn2, *nc_root;
int32_t systemFlags;
bool move_op = false;
bool rename_op = false;
int ret;
/* Skip the checks if old and new DN are the same, or if we have the
* relax control specified or if the returned objects is already
* deleted and needs only to be moved for consistency. */
if (ldb_dn_compare(olddn, newdn) == 0) {
return LDB_SUCCESS;
}
if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) != NULL) {
return LDB_SUCCESS;
}
if (ldb_msg_find_attr_as_bool(msg, "isDeleted", false)) {
/*
* check originating request if we are supposed
* to "see" this record in first place.
*/
if (ldb_request_get_control(ac->req, LDB_CONTROL_SHOW_DELETED_OID) == NULL) {
return LDB_ERR_NO_SUCH_OBJECT;
}
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* Objects under CN=System */
dn1 = ldb_dn_copy(ac, ldb_get_default_basedn(ldb));
if (dn1 == NULL) return ldb_oom(ldb);
if ( ! ldb_dn_add_child_fmt(dn1, "CN=System")) {
talloc_free(dn1);
return LDB_ERR_OPERATIONS_ERROR;
}
if ((ldb_dn_compare_base(dn1, olddn) == 0) &&
(ldb_dn_compare_base(dn1, newdn) != 0)) {
talloc_free(dn1);
ldb_asprintf_errstring(ldb,
"subtree_rename: Cannot move/rename %s. Objects under CN=System have to stay under it!",
ldb_dn_get_linearized(olddn));
return LDB_ERR_OTHER;
}
talloc_free(dn1);
/* LSA objects */
if ((samdb_find_attribute(ldb, msg, "objectClass", "secret") != NULL) ||
(samdb_find_attribute(ldb, msg, "objectClass", "trustedDomain") != NULL)) {
ldb_asprintf_errstring(ldb,
"subtree_rename: Cannot move/rename %s. It's an LSA-specific object!",
ldb_dn_get_linearized(olddn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* subnet objects */
if (samdb_find_attribute(ldb, msg, "objectclass", "subnet") != NULL) {
ret = samldb_verify_subnet(ac, newdn);
if (ret != LDB_SUCCESS) {
return ret;
}
}
/* systemFlags */
dn1 = ldb_dn_get_parent(ac, olddn);
if (dn1 == NULL) return ldb_oom(ldb);
dn2 = ldb_dn_get_parent(ac, newdn);
if (dn2 == NULL) return ldb_oom(ldb);
if (ldb_dn_compare(dn1, dn2) == 0) {
rename_op = true;
} else {
move_op = true;
}
talloc_free(dn1);
talloc_free(dn2);
systemFlags = ldb_msg_find_attr_as_int(msg, "systemFlags", 0);
/* Fetch name context */
ret = dsdb_find_nc_root(ldb, ac, olddn, &nc_root);
if (ret != LDB_SUCCESS) {
return ret;
}
if (ldb_dn_compare(nc_root, ldb_get_schema_basedn(ldb)) == 0) {
if (move_op) {
ldb_asprintf_errstring(ldb,
"subtree_rename: Cannot move %s within schema partition",
ldb_dn_get_linearized(olddn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
if (rename_op &&
(systemFlags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) != 0) {
ldb_asprintf_errstring(ldb,
"subtree_rename: Cannot rename %s within schema partition",
ldb_dn_get_linearized(olddn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
} else if (ldb_dn_compare(nc_root, ldb_get_config_basedn(ldb)) == 0) {
if (move_op &&
(systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_MOVE) == 0) {
/* Here we have to do more: control the
* "ALLOW_LIMITED_MOVE" flag. This means that the
* grand-grand-parents of two objects have to be equal
* in order to perform the move (this is used for
* moving "server" objects in the "sites" container). */
bool limited_move =
systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_LIMITED_MOVE;
if (limited_move) {
dn1 = ldb_dn_copy(ac, olddn);
if (dn1 == NULL) return ldb_oom(ldb);
dn2 = ldb_dn_copy(ac, newdn);
if (dn2 == NULL) return ldb_oom(ldb);
limited_move &= ldb_dn_remove_child_components(dn1, 3);
limited_move &= ldb_dn_remove_child_components(dn2, 3);
limited_move &= ldb_dn_compare(dn1, dn2) == 0;
talloc_free(dn1);
talloc_free(dn2);
}
if (!limited_move
&& ldb_request_get_control(ac->req, DSDB_CONTROL_RESTORE_TOMBSTONE_OID) == NULL) {
ldb_asprintf_errstring(ldb,
"subtree_rename: Cannot move %s to %s in config partition",
ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
}
if (rename_op &&
(systemFlags & SYSTEM_FLAG_CONFIG_ALLOW_RENAME) == 0) {
ldb_asprintf_errstring(ldb,
"subtree_rename: Cannot rename %s to %s within config partition",
ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
} else if (ldb_dn_compare(nc_root, ldb_get_default_basedn(ldb)) == 0) {
if (move_op &&
(systemFlags & SYSTEM_FLAG_DOMAIN_DISALLOW_MOVE) != 0) {
ldb_asprintf_errstring(ldb,
"subtree_rename: Cannot move %s to %s - DISALLOW_MOVE set",
ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
if (rename_op &&
(systemFlags & SYSTEM_FLAG_DOMAIN_DISALLOW_RENAME) != 0) {
ldb_asprintf_errstring(ldb,
"subtree_rename: Cannot rename %s to %s - DISALLOW_RENAME set",
ldb_dn_get_linearized(olddn), ldb_dn_get_linearized(newdn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
}
talloc_free(nc_root);
return LDB_SUCCESS;
}
static int samldb_rename_search_base_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct samldb_ctx *ac;
int ret;
ac = talloc_get_type(req->context, struct samldb_ctx);
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:
/*
* This is the root entry of the originating move
* respectively rename request. It has been already
* stored in the list using "subtree_rename_search()".
* Only this one is subject to constraint checking.
*/
ret = check_rename_constraints(ares->message, ac,
ac->req->op.rename.olddn,
ac->req->op.rename.newdn);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL,
ret);
}
break;
case LDB_REPLY_REFERRAL:
/* ignore */
break;
case LDB_REPLY_DONE:
/*
* Great, no problem with the rename, so go ahead as
* if we never were here
*/
ret = ldb_next_request(ac->module, ac->req);
talloc_free(ares);
return ret;
}
talloc_free(ares);
return LDB_SUCCESS;
}
/* rename */
static int samldb_rename(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
static const char * const attrs[] = { "objectClass", "systemFlags",
"isDeleted", NULL };
struct ldb_request *search_req;
struct samldb_ctx *ac;
int ret;
if (ldb_dn_is_special(req->op.rename.olddn)) { /* do not manipulate our control entries */
return ldb_next_request(module, req);
}
ldb = ldb_module_get_ctx(module);
ac = samldb_ctx_init(module, req);
if (!ac) {
return ldb_oom(ldb);
}
ret = ldb_build_search_req(&search_req, ldb, ac,
req->op.rename.olddn,
LDB_SCOPE_BASE,
"(objectClass=*)",
attrs,
NULL,
ac,
samldb_rename_search_base_callback,
req);
LDB_REQ_SET_LOCATION(search_req);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = ldb_request_add_control(search_req, LDB_CONTROL_SHOW_RECYCLED_OID,
true, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_next_request(ac->module, search_req);
}
/* extended */
static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb = ldb_module_get_ctx(module);
struct dsdb_fsmo_extended_op *exop;
int ret;
exop = talloc_get_type(req->op.extended.data,
struct dsdb_fsmo_extended_op);
if (!exop) {
ldb_set_errstring(ldb,
"samldb_extended_allocate_rid_pool: invalid extended data");
return LDB_ERR_PROTOCOL_ERROR;
}
ret = ridalloc_allocate_rid_pool_fsmo(module, exop, req);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
}
static int samldb_extended_allocate_rid(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb = ldb_module_get_ctx(module);
struct dsdb_extended_allocate_rid *exop;
int ret;
exop = talloc_get_type(req->op.extended.data,
struct dsdb_extended_allocate_rid);
if (!exop) {
ldb_set_errstring(ldb,
"samldb_extended_allocate_rid: invalid extended data");
return LDB_ERR_PROTOCOL_ERROR;
}
ret = ridalloc_allocate_rid(module, &exop->rid, req);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
}
static int samldb_extended_create_own_rid_set(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb = ldb_module_get_ctx(module);
int ret;
struct ldb_dn *dn;
if (req->op.extended.data != NULL) {
ldb_set_errstring(ldb,
"samldb_extended_allocate_rid_pool_for_us: invalid extended data (should be NULL)");
return LDB_ERR_PROTOCOL_ERROR;
}
ret = ridalloc_create_own_rid_set(module, req,
&dn, req);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
}
static int samldb_extended(struct ldb_module *module, struct ldb_request *req)
{
if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) {
return samldb_extended_allocate_rid_pool(module, req);
}
if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID) == 0) {
return samldb_extended_allocate_rid(module, req);
}
if (strcmp(req->op.extended.oid, DSDB_EXTENDED_CREATE_OWN_RID_SET) == 0) {
return samldb_extended_create_own_rid_set(module, req);
}
return ldb_next_request(module, req);
}
static const struct ldb_module_ops ldb_samldb_module_ops = {
.name = "samldb",
.add = samldb_add,
.modify = samldb_modify,
.del = samldb_delete,
.rename = samldb_rename,
.extended = samldb_extended
};
int ldb_samldb_module_init(const char *version)
{
LDB_MODULE_CHECK_VERSION(version);
return ldb_register_module(&ldb_samldb_module_ops);
}
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