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/*
Unix SMB/CIFS implementation.
useful utilities for the DRS server
Copyright (C) Andrew Tridgell 2009
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "rpc_server/dcerpc_server.h"
#include "dsdb/samdb/samdb.h"
#include "libcli/security/security.h"
#include "libcli/security/session.h"
#include "param/param.h"
#include "auth/session.h"
int drsuapi_search_with_extended_dn(struct ldb_context *ldb,
TALLOC_CTX *mem_ctx,
struct ldb_result **_res,
struct ldb_dn *basedn,
enum ldb_scope scope,
const char * const *attrs,
const char *filter)
{
int ret;
struct ldb_request *req;
TALLOC_CTX *tmp_ctx;
struct ldb_result *res;
tmp_ctx = talloc_new(mem_ctx);
res = talloc_zero(tmp_ctx, struct ldb_result);
if (!res) {
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_build_search_req(&req, ldb, tmp_ctx,
basedn,
scope,
filter,
attrs,
NULL,
res,
ldb_search_default_callback,
NULL);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
ret = ldb_request_add_control(req, LDB_CONTROL_EXTENDED_DN_OID, true, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = ldb_request_add_control(req, LDB_CONTROL_SHOW_RECYCLED_OID, true, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = ldb_request_add_control(req, LDB_CONTROL_REVEAL_INTERNALS, false, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = ldb_request(ldb, req);
if (ret == LDB_SUCCESS) {
ret = ldb_wait(req->handle, LDB_WAIT_ALL);
}
talloc_free(req);
*_res = talloc_steal(mem_ctx, res);
return ret;
}
WERROR drs_security_level_check(struct dcesrv_call_state *dce_call,
const char* call,
enum security_user_level minimum_level,
const struct dom_sid *domain_sid)
{
enum security_user_level level;
if (lpcfg_parm_bool(dce_call->conn->dce_ctx->lp_ctx, NULL,
"drs", "disable_sec_check", false)) {
return WERR_OK;
}
level = security_session_user_level(dce_call->conn->auth_state.session_info, domain_sid);
if (level < minimum_level) {
if (call) {
DEBUG(0,("%s refused for security token (level=%u)\n",
call, (unsigned)level));
security_token_debug(0, 2, dce_call->conn->auth_state.session_info->security_token);
}
return WERR_DS_DRA_ACCESS_DENIED;
}
return WERR_OK;
}
void drsuapi_process_secret_attribute(struct drsuapi_DsReplicaAttribute *attr,
struct drsuapi_DsReplicaMetaData *meta_data)
{
if (attr->value_ctr.num_values == 0) {
return;
}
switch (attr->attid) {
case DRSUAPI_ATTID_dBCSPwd:
case DRSUAPI_ATTID_unicodePwd:
case DRSUAPI_ATTID_ntPwdHistory:
case DRSUAPI_ATTID_lmPwdHistory:
case DRSUAPI_ATTID_supplementalCredentials:
case DRSUAPI_ATTID_priorValue:
case DRSUAPI_ATTID_currentValue:
case DRSUAPI_ATTID_trustAuthOutgoing:
case DRSUAPI_ATTID_trustAuthIncoming:
case DRSUAPI_ATTID_initialAuthOutgoing:
case DRSUAPI_ATTID_initialAuthIncoming:
/*set value to null*/
attr->value_ctr.num_values = 0;
talloc_free(attr->value_ctr.values);
attr->value_ctr.values = NULL;
meta_data->originating_change_time = 0;
return;
default:
return;
}
}
/*
check security on a DN, with logging of errors
*/
static WERROR drs_security_access_check_log(struct ldb_context *sam_ctx,
TALLOC_CTX *mem_ctx,
struct security_token *token,
struct ldb_dn *dn,
const char *ext_right)
{
int ret;
if (!dn) {
DEBUG(3,("drs_security_access_check: Null dn provided, access is denied for %s\n",
ext_right));
return WERR_DS_DRA_ACCESS_DENIED;
}
ret = dsdb_check_access_on_dn(sam_ctx,
mem_ctx,
dn,
token,
SEC_ADS_CONTROL_ACCESS,
ext_right);
if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
DEBUG(3,("%s refused for security token on %s\n",
ext_right, ldb_dn_get_linearized(dn)));
security_token_debug(2, 0, token);
return WERR_DS_DRA_ACCESS_DENIED;
} else if (ret != LDB_SUCCESS) {
DEBUG(1,("Failed to perform access check on %s\n", ldb_dn_get_linearized(dn)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
return WERR_OK;
}
/*
check security on a object identifier
*/
WERROR drs_security_access_check(struct ldb_context *sam_ctx,
TALLOC_CTX *mem_ctx,
struct security_token *token,
struct drsuapi_DsReplicaObjectIdentifier *nc,
const char *ext_right)
{
struct ldb_dn *dn = drs_ObjectIdentifier_to_dn(mem_ctx, sam_ctx, nc);
WERROR werr;
werr = drs_security_access_check_log(sam_ctx, mem_ctx, token, dn, ext_right);
talloc_free(dn);
return werr;
}
/*
check security on the NC root of a object identifier
*/
WERROR drs_security_access_check_nc_root(struct ldb_context *sam_ctx,
TALLOC_CTX *mem_ctx,
struct security_token *token,
struct drsuapi_DsReplicaObjectIdentifier *nc,
const char *ext_right)
{
struct ldb_dn *dn, *nc_root;
WERROR werr;
int ret;
dn = drs_ObjectIdentifier_to_dn(mem_ctx, sam_ctx, nc);
W_ERROR_HAVE_NO_MEMORY(dn);
ret = dsdb_find_nc_root(sam_ctx, dn, dn, &nc_root);
if (ret != LDB_SUCCESS) {
return WERR_DS_CANT_FIND_EXPECTED_NC;
}
werr = drs_security_access_check_log(sam_ctx, mem_ctx, token, nc_root, ext_right);
talloc_free(dn);
return werr;
}
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