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|
/*
SAM ldb module
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
Copyright (C) Simo Sorce 2004-2008
Copyright (C) Matthias Dieter Wallnöfer 2009-2010
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: add embedded user/group creation functionality
*
* Author: Simo Sorce
*/
#include "includes.h"
#include "libcli/ldap/ldap_ndr.h"
#include "ldb_module.h"
#include "dsdb/samdb/samdb.h"
#include "dsdb/samdb/ldb_modules/util.h"
#include "libcli/security/security.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "../lib/util/util_ldb.h"
#include "ldb_wrap.h"
#include "param/param.h"
struct samldb_ctx;
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 */
const char *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);
}
}
/* 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);
const char *name;
int ret;
if (ldb_msg_find_element(ac->msg, "sAMAccountName") == NULL) {
ret = samldb_generate_sAMAccountName(ldb, ac->msg);
if (ret != LDB_SUCCESS) {
return ret;
}
}
name = ldb_msg_find_attr_as_string(ac->msg, "sAMAccountName", NULL);
if (name == NULL) {
return ldb_operr(ldb);
}
ret = samdb_search_count(ldb, NULL, "(sAMAccountName=%s)",
ldb_binary_encode_string(ac, name));
if ((ret < 0) || (ret > 1)) {
return ldb_operr(ldb);
}
if (ret == 1) {
return LDB_ERR_ENTRY_ALREADY_EXISTS;
}
return samldb_next_step(ac);
}
/* sAMAccountType handling */
static int samldb_check_sAMAccountType(struct samldb_ctx *ac)
{
struct ldb_context *ldb;
unsigned int account_type;
unsigned int group_type;
unsigned int uac;
int ret;
ldb = ldb_module_get_ctx(ac->module);
/* make sure sAMAccountType is not specified */
if (ldb_msg_find_element(ac->msg, "sAMAccountType") != NULL) {
ldb_asprintf_errstring(ldb,
"sAMAccountType must not be specified!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
if (strcmp("user", ac->type) == 0) {
uac = samdb_result_uint(ac->msg, "userAccountControl", 0);
if (uac == 0) {
ldb_asprintf_errstring(ldb,
"userAccountControl invalid!");
return LDB_ERR_UNWILLING_TO_PERFORM;
} else {
account_type = ds_uf2atype(uac);
ret = samdb_msg_add_uint(ldb,
ac->msg, ac->msg,
"sAMAccountType",
account_type);
if (ret != LDB_SUCCESS) {
return ret;
}
}
} else if (strcmp("group", ac->type) == 0) {
group_type = samdb_result_uint(ac->msg, "groupType", 0);
if (group_type == 0) {
ldb_asprintf_errstring(ldb,
"groupType invalid!\n");
return LDB_ERR_UNWILLING_TO_PERFORM;
} else {
account_type = ds_gtype2atype(group_type);
ret = samdb_msg_add_uint(ldb,
ac->msg, ac->msg,
"sAMAccountType",
account_type);
if (ret != LDB_SUCCESS) {
return ret;
}
}
}
return samldb_next_step(ac);
}
/* primaryGroupID handling */
static int samldb_check_primaryGroupID(struct samldb_ctx *ac)
{
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
struct ldb_dn *prim_group_dn;
uint32_t rid;
struct dom_sid *sid;
int ret;
rid = samdb_result_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
if (rid == (uint32_t) -1) {
rid = DOMAIN_RID_USERS;
ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
"primaryGroupID", rid);
if (ret != LDB_SUCCESS) {
return ret;
}
}
sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
if (sid == NULL) {
return ldb_operr(ldb);
}
prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSID=%s)",
dom_sid_string(ac, sid));
if (prim_group_dn == NULL) {
ldb_asprintf_errstring(ldb,
"Failed to find primary group with RID %u!",
rid);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
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);
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, unsigned krbtgt_number)
{
TALLOC_CTX *tmp_ctx = talloc_new(ac);
struct ldb_result *res;
const char *attrs[] = { NULL };
int ret;
ret = dsdb_module_search(ac->module, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
attrs, DSDB_FLAG_NEXT_MODULE,
"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);
unsigned krbtgt_number, i_start, i;
int ret;
/* 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_module_get_ctx(ac->module),
"%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 = ldb_msg_add_fmt(ac->msg, "msDS-SecondaryKrbTgtNumber", "%u", 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);
}
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 *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,
"(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;
}
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;
uint32_t system_flags;
struct ldb_context *ldb;
struct ldb_result *ldb_res;
struct ldb_dn *schema_dn;
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_uint(ac->msg, "systemFlags", 0);
if (system_flags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) {
return LDB_SUCCESS;
}
/* Generate new value for msDs-IntId
* Value should be in 0x80000000..0xBFFFFFFF range */
msds_intid = generate_random() % 0X3FFFFFFF;
msds_intid += 0x80000000;
/* probe id values until unique one is found */
do {
msds_intid++;
if (msds_intid > 0xBFFFFFFF) {
msds_intid = 0x80000001;
}
ret = dsdb_module_search(ac->module, ac,
&ldb_res,
schema_dn, LDB_SCOPE_ONELEVEL, NULL,
DSDB_FLAG_NEXT_MODULE,
"(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);
return ldb_msg_add_fmt(ac->msg, "msDS-IntId", "%d", 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_set_errstring(ldb,
"Invalid reply type!\n");
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);
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, const char *type)
{
struct ldb_context *ldb;
struct loadparm_context *lp_ctx;
enum sid_generator sid_generator;
int ret;
struct ldb_control *rodc_control;
struct dom_sid *sid;
ldb = ldb_module_get_ctx(ac->module);
/* Add informations for the different account types */
ac->type = type;
if (strcmp(ac->type, "user") == 0) {
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"userAccountControl", "546");
if (ret != LDB_SUCCESS) return ret;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"badPwdCount", "0");
if (ret != LDB_SUCCESS) return ret;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"codePage", "0");
if (ret != LDB_SUCCESS) return ret;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"countryCode", "0");
if (ret != LDB_SUCCESS) return ret;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"badPasswordTime", "0");
if (ret != LDB_SUCCESS) return ret;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"lastLogoff", "0");
if (ret != LDB_SUCCESS) return ret;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"lastLogon", "0");
if (ret != LDB_SUCCESS) return ret;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"pwdLastSet", "0");
if (ret != LDB_SUCCESS) return ret;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"accountExpires", "9223372036854775807");
if (ret != LDB_SUCCESS) return ret;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"logonCount", "0");
if (ret != LDB_SUCCESS) return ret;
} else if (strcmp(ac->type, "group") == 0) {
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"groupType", "-2147483646");
if (ret != LDB_SUCCESS) return ret;
} else if (strcmp(ac->type, "classSchema") == 0) {
const struct ldb_val *rdn_value, *def_obj_cat_val;
ret = samdb_find_or_add_attribute(ldb, ac->msg,
"rdnAttId", "cn");
if (ret != LDB_SUCCESS) return ret;
/* do not allow 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 (!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,
(const char *) rdn_value->data));
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
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;
}
}
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 = samdb_msg_add_string(ldb, ac, ac->msg,
"defaultObjectCategory",
ldb_dn_get_linearized(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;
return samldb_first_step(ac);
} else if (strcmp(ac->type, "attributeSchema") == 0) {
const struct ldb_val *rdn_value;
rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
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,
(const char *) rdn_value->data));
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
return ret;
}
}
/* do not allow 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 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;
}
}
/* 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;
return samldb_first_step(ac);
} else {
ldb_asprintf_errstring(ldb,
"Invalid entry type!");
return LDB_ERR_OPERATIONS_ERROR;
}
rodc_control = ldb_request_get_control(ac->req, LDB_CONTROL_RODC_DCPROMO_OID);
if (rodc_control) {
/* 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;
/* check account_type/group_type */
ret = samldb_add_step(ac, samldb_check_sAMAccountType);
if (ret != LDB_SUCCESS) return ret;
/* check if we have a valid primary group ID */
if (strcmp(ac->type, "user") == 0) {
ret = samldb_add_step(ac, samldb_check_primaryGroupID);
if (ret != LDB_SUCCESS) return ret;
}
lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
struct loadparm_context);
/* don't allow objectSID to be specified without the RELAX control */
sid = samdb_result_dom_sid(ac, ac->msg, "objectSid");
if (sid && !ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) &&
!dsdb_module_am_system(ac->module)) {
ldb_asprintf_errstring(ldb, "No SID may be specified in user/group creation for %s",
ldb_dn_get_linearized(ac->msg->dn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
if (sid == NULL) {
sid_generator = lpcfg_sid_generator(lp_ctx);
if (sid_generator == SID_GENERATOR_INTERNAL) {
ret = samldb_add_step(ac, samldb_allocate_sid);
if (ret != LDB_SUCCESS) return ret;
}
}
/* 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_fill_foreignSecurityPrincipal_object(struct samldb_ctx *ac)
{
struct ldb_context *ldb;
struct dom_sid *sid;
int ret;
ldb = ldb_module_get_ctx(ac->module);
sid = samdb_result_dom_sid(ac->msg, ac->msg, "objectSid");
if (sid == NULL) {
sid = dom_sid_parse_talloc(ac->msg,
(const char *)ldb_dn_get_rdn_val(ac->msg->dn)->data);
if (sid == NULL) {
ldb_set_errstring(ldb,
"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)
{
WERROR werr;
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_RELAX_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);
}
werr = dsdb_module_schema_info_update(ac->module, schema, DSDB_FLAG_NEXT_MODULE);
if (!W_ERROR_IS_OK(werr)) {
ldb_debug_set(ldb, LDB_DEBUG_FATAL,
"samldb_schema_info_update: "
"dsdb_module_schema_info_update failed with %s",
win_errstr(werr));
DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
return ldb_operr(ldb);
}
return LDB_SUCCESS;
}
static int samldb_prim_group_change(struct samldb_ctx *ac)
{
struct ldb_context *ldb;
const char * attrs[] = { "primaryGroupID", "memberOf", NULL };
struct ldb_result *res;
struct ldb_message_element *el;
struct ldb_message *msg;
uint32_t rid;
struct dom_sid *sid;
struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
int ret;
ldb = ldb_module_get_ctx(ac->module);
/* Fetch informations from the existing object */
ret = ldb_search(ldb, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
/* Finds out the DN of the old primary group */
rid = samdb_result_uint(res->msgs[0], "primaryGroupID", (uint32_t) -1);
if (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;
}
sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
if (sid == NULL) {
return ldb_operr(ldb);
}
prev_prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSID=%s)",
dom_sid_string(ac, sid));
if (prev_prim_group_dn == NULL) {
return ldb_operr(ldb);
}
/* Finds out the DN of the new primary group */
rid = samdb_result_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
if (rid == (uint32_t) -1) {
/* we aren't affected of any primary group change */
return LDB_SUCCESS;
}
sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
if (sid == NULL) {
return ldb_operr(ldb);
}
new_prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSID=%s)",
dom_sid_string(ac, sid));
if (new_prim_group_dn == NULL) {
/* Here we know if the specified new primary group candidate is
* valid or not. */
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* Only update the "member" attributes when we really do have a change */
if (ldb_dn_compare(new_prim_group_dn, prev_prim_group_dn) != 0) {
/* 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",
ldb_dn_get_linearized(new_prim_group_dn));
if (el == NULL) {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* Remove the "member" attribute on the new primary group */
msg = talloc_zero(ac, struct ldb_message);
msg->dn = new_prim_group_dn;
ret = samdb_msg_add_delval(ldb, ac, msg, "member",
ldb_dn_get_linearized(ac->msg->dn));
if (ret != LDB_SUCCESS) {
return ret;
}
ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE);
if (ret != LDB_SUCCESS) {
return ret;
}
/* Add a "member" attribute for the previous primary group */
msg = talloc_zero(ac, struct ldb_message);
msg->dn = prev_prim_group_dn;
ret = samdb_msg_add_addval(ldb, ac, msg, "member",
ldb_dn_get_linearized(ac->msg->dn));
if (ret != LDB_SUCCESS) {
return ret;
}
ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE);
if (ret != LDB_SUCCESS) {
return ret;
}
}
return LDB_SUCCESS;
}
static int samldb_member_check(struct samldb_ctx *ac)
{
struct ldb_context *ldb;
struct ldb_message_element *el;
struct ldb_dn *member_dn, *group_dn;
uint32_t prim_group_rid;
struct dom_sid *sid;
unsigned int i;
ldb = ldb_module_get_ctx(ac->module);
el = ldb_msg_find_element(ac->msg, "member");
if (el == NULL) {
/* we aren't affected */
return LDB_SUCCESS;
}
for (i = 0; i < el->num_values; i++) {
/* Denies to add "member"s to groups which are primary ones
* for them */
member_dn = ldb_dn_from_ldb_val(ac, ldb, &el->values[i]);
if (!ldb_dn_validate(member_dn)) {
return ldb_operr(ldb);
}
prim_group_rid = samdb_search_uint(ldb, ac, (uint32_t) -1,
member_dn, "primaryGroupID",
NULL);
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);
}
group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSID=%s)",
dom_sid_string(ac, sid));
if (group_dn == NULL) {
return ldb_operr(ldb);
}
if (ldb_dn_compare(group_dn, ac->msg->dn) == 0) {
return LDB_ERR_ENTRY_ALREADY_EXISTS;
}
}
return LDB_SUCCESS;
}
/* add */
static int samldb_add(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct samldb_ctx *ac;
int ret;
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);
}
ac = samldb_ctx_init(module, req);
if (ac == NULL) {
return ldb_operr(ldb);
}
/* build the new msg */
req->op.add.message = ac->msg = ldb_msg_copy_shallow(req,
req->op.add.message);
if (ac->msg == NULL) {
return ldb_operr(ldb);
}
if (samdb_find_attribute(ldb, ac->msg,
"objectclass", "user") != NULL) {
return samldb_fill_object(ac, "user");
}
if (samdb_find_attribute(ldb, ac->msg,
"objectclass", "group") != NULL) {
return samldb_fill_object(ac, "group");
}
/* 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) {
ret = samldb_schema_info_update(ac);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
return samldb_fill_object(ac, "classSchema");
}
if (samdb_find_attribute(ldb, ac->msg,
"objectclass", "attributeSchema") != NULL) {
ret = samldb_schema_info_update(ac);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
return samldb_fill_object(ac, "attributeSchema");
}
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;
int ret;
uint32_t account_type;
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);
if (ldb_msg_find_element(req->op.mod.message, "sAMAccountType") != NULL) {
ldb_asprintf_errstring(ldb,
"sAMAccountType 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;
}
}
ac = samldb_ctx_init(module, req);
if (ac == NULL) {
return ldb_operr(ldb);
}
/* build the new msg */
req->op.mod.message = ac->msg = ldb_msg_copy_shallow(req,
req->op.mod.message);
if (ac->msg == NULL) {
return ldb_operr(ldb);
}
el = ldb_msg_find_element(ac->msg, "groupType");
if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) && el->num_values == 1) {
uint32_t group_type;
group_type = strtoul((const char *)el->values[0].data, NULL, 0);
account_type = ds_gtype2atype(group_type);
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;
}
if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE)) {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
el = ldb_msg_find_element(ac->msg, "primaryGroupID");
if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) && el->num_values == 1) {
ret = samldb_prim_group_change(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE)) {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
el = ldb_msg_find_element(ac->msg, "userAccountControl");
if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) && el->num_values == 1) {
uint32_t user_account_control;
user_account_control = strtoul((const char *)el->values[0].data,
NULL, 0);
account_type = ds_uf2atype(user_account_control);
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;
if (user_account_control & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
ret = samdb_msg_add_string(ldb, ac->msg, ac->msg,
"isCriticalSystemObject",
"TRUE");
if (ret != LDB_SUCCESS) {
return ret;
}
el2 = ldb_msg_find_element(ac->msg,
"isCriticalSystemObject");
el2->flags = LDB_FLAG_MOD_REPLACE;
/* DCs have primaryGroupID of DOMAIN_RID_DCS */
if (!ldb_msg_find_element(ac->msg, "primaryGroupID")) {
uint32_t rid;
if (user_account_control & UF_SERVER_TRUST_ACCOUNT) {
rid = DOMAIN_RID_DCS;
} else {
/* read-only DC */
rid = DOMAIN_RID_READONLY_DCS;
}
ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
"primaryGroupID", rid);
if (ret != LDB_SUCCESS) {
return ret;
}
el2 = ldb_msg_find_element(ac->msg,
"primaryGroupID");
el2->flags = LDB_FLAG_MOD_REPLACE;
}
}
}
if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE)) {
return LDB_ERR_UNWILLING_TO_PERFORM;
}
el = ldb_msg_find_element(ac->msg, "member");
if (el && el->flags & (LDB_FLAG_MOD_ADD|LDB_FLAG_MOD_REPLACE) && el->num_values == 1) {
ret = samldb_member_check(ac);
if (ret != LDB_SUCCESS) {
return ret;
}
}
talloc_free(ac);
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 count;
ldb = ldb_module_get_ctx(ac->module);
/* Finds out the SID/RID of the SAM object */
sid = samdb_search_dom_sid(ldb, ac, ac->req->op.del.dn, "objectSID",
NULL);
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;
}
/* Deny delete requests from groups which are primary ones */
count = samdb_search_count(ldb, NULL,
"(&(primaryGroupID=%u)(objectClass=user))",
rid);
if (count < 0) {
return ldb_operr(ldb);
}
if (count > 0) {
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;
int ret;
if (ldb_dn_is_special(req->op.del.dn)) {
/* do not manipulate our control entries */
return ldb_next_request(module, req);
}
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;
}
return ldb_next_request(module, 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_debug(ldb, LDB_DEBUG_FATAL, "samldb_extended_allocate_rid_pool: invalid extended data\n");
return LDB_ERR_PROTOCOL_ERROR;
}
ret = ridalloc_allocate_rid_pool_fsmo(module, exop);
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);
}
return ldb_next_request(module, req);
}
_PUBLIC_ const struct ldb_module_ops ldb_samldb_module_ops = {
.name = "samldb",
.add = samldb_add,
.modify = samldb_modify,
.del = samldb_delete,
.extended = samldb_extended
};
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