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/*
Unix SMB/CIFS implementation.
implement the DsAddEntry call
Copyright (C) Stefan Metzmacher 2009
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 "dsdb/common/util.h"
#include "param/param.h"
#include "rpc_server/drsuapi/dcesrv_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "libcli/security/security.h"
/*
add special SPNs needed for DRS replication to machine accounts when
an AddEntry is done to create a nTDSDSA object
*/
static WERROR drsuapi_add_SPNs(struct drsuapi_bind_state *b_state,
struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
const struct drsuapi_DsReplicaObjectListItem *first_object)
{
int ret;
const struct drsuapi_DsReplicaObjectListItem *obj;
const char *attrs[] = { "serverReference", "objectGUID", NULL };
for (obj = first_object; obj; obj=obj->next_object) {
const char *dn_string = obj->object.identifier->dn;
struct ldb_dn *dn = ldb_dn_new(mem_ctx, b_state->sam_ctx, dn_string);
struct ldb_result *res, *res2;
struct ldb_dn *ref_dn;
struct GUID ntds_guid;
struct ldb_message *msg;
struct ldb_message_element *el;
const char *ntds_guid_str;
const char *dom_string;
const char *attrs2[] = { "dNSHostName", "cn", NULL };
const char *dNSHostName, *cn;
DEBUG(6,(__location__ ": Adding SPNs for %s\n",
ldb_dn_get_linearized(dn)));
ret = ldb_search(b_state->sam_ctx, mem_ctx, &res,
dn, LDB_SCOPE_BASE, attrs,
"(objectClass=ntDSDSA)");
if (ret != LDB_SUCCESS || res->count < 1) {
DEBUG(0,(__location__ ": Failed to find dn '%s'\n", dn_string));
return WERR_DS_DRA_INTERNAL_ERROR;
}
ref_dn = samdb_result_dn(b_state->sam_ctx, mem_ctx, res->msgs[0], "serverReference", NULL);
if (ref_dn == NULL) {
/* we only add SPNs for objects with a
serverReference */
continue;
}
DEBUG(6,(__location__ ": serverReference %s\n",
ldb_dn_get_linearized(ref_dn)));
ntds_guid = samdb_result_guid(res->msgs[0], "objectGUID");
ntds_guid_str = GUID_string(res, &ntds_guid);
dom_string = lpcfg_dnsdomain(dce_call->conn->dce_ctx->lp_ctx);
/* get the dNSHostName and cn */
ret = ldb_search(b_state->sam_ctx, mem_ctx, &res2,
ref_dn, LDB_SCOPE_BASE, attrs2, NULL);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find ref_dn '%s'\n",
ldb_dn_get_linearized(ref_dn)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
dNSHostName = ldb_msg_find_attr_as_string(res2->msgs[0], "dNSHostName", NULL);
cn = ldb_msg_find_attr_as_string(res2->msgs[0], "cn", NULL);
/*
* construct a modify request to add the new SPNs to
* the machine account
*/
msg = ldb_msg_new(mem_ctx);
if (msg == NULL) {
return WERR_NOMEM;
}
msg->dn = ref_dn;
ret = ldb_msg_add_empty(msg, "servicePrincipalName",
LDB_FLAG_MOD_ADD, &el);
if (ret != LDB_SUCCESS) {
return WERR_NOMEM;
}
ldb_msg_add_steal_string(msg, "servicePrincipalName",
talloc_asprintf(el->values,
"E3514235-4B06-11D1-AB04-00C04FC2DCD2/%s/%s",
ntds_guid_str, dom_string));
ldb_msg_add_steal_string(msg, "servicePrincipalName",
talloc_asprintf(el->values, "ldap/%s._msdcs.%s",
ntds_guid_str, dom_string));
if (cn) {
ldb_msg_add_steal_string(msg, "servicePrincipalName",
talloc_asprintf(el->values, "ldap/%s", cn));
}
if (dNSHostName) {
ldb_msg_add_steal_string(msg, "servicePrincipalName",
talloc_asprintf(el->values, "ldap/%s", dNSHostName));
}
if (el->num_values < 2) {
return WERR_NOMEM;
}
ret = dsdb_modify(b_state->sam_ctx, msg, DSDB_MODIFY_PERMISSIVE);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to add SPNs - %s\n",
ldb_errstring(b_state->sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
}
return WERR_OK;
}
/*
drsuapi_DsAddEntry
*/
WERROR dcesrv_drsuapi_DsAddEntry(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct drsuapi_DsAddEntry *r)
{
WERROR status;
struct drsuapi_bind_state *b_state;
struct dcesrv_handle *h;
uint32_t num = 0;
struct drsuapi_DsReplicaObjectIdentifier2 *ids = NULL;
int ret;
const struct drsuapi_DsReplicaObjectListItem *first_object;
if (DEBUGLVL(4)) {
NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsAddEntry, NDR_IN, r);
}
/* TODO: check which out level the client supports */
ZERO_STRUCTP(r->out.ctr);
*r->out.level_out = 3;
r->out.ctr->ctr3.err_ver = 1;
r->out.ctr->ctr3.err_data = talloc_zero(mem_ctx, union drsuapi_DsAddEntry_ErrData);
DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
b_state = h->data;
status = drs_security_level_check(dce_call, "DsAddEntry", SECURITY_DOMAIN_CONTROLLER, NULL);
if (!W_ERROR_IS_OK(status)) {
return status;
}
switch (r->in.level) {
case 2:
ret = ldb_transaction_start(b_state->sam_ctx);
if (ret != LDB_SUCCESS) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
first_object = &r->in.req->req2.first_object;
status = dsdb_origin_objects_commit(b_state->sam_ctx,
mem_ctx,
first_object,
&num,
&ids);
if (!W_ERROR_IS_OK(status)) {
r->out.ctr->ctr3.err_data->v1.status = status;
ldb_transaction_cancel(b_state->sam_ctx);
DEBUG(0,(__location__ ": DsAddEntry failed - %s\n", win_errstr(status)));
return status;
}
r->out.ctr->ctr3.count = num;
r->out.ctr->ctr3.objects = ids;
break;
default:
return WERR_FOOBAR;
}
/* if any of the added entries are nTDSDSA objects then we
* need to add the SPNs to the machine account
*/
status = drsuapi_add_SPNs(b_state, dce_call, mem_ctx, first_object);
if (!W_ERROR_IS_OK(status)) {
r->out.ctr->ctr3.err_data->v1.status = status;
ldb_transaction_cancel(b_state->sam_ctx);
DEBUG(0,(__location__ ": DsAddEntry add SPNs failed - %s\n", win_errstr(status)));
return status;
}
ret = ldb_transaction_commit(b_state->sam_ctx);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": DsAddEntry commit failed: %s\n",
ldb_errstring(b_state->sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
return WERR_OK;
}
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