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/*
Unix SMB/CIFS implementation.
Do a netr_DsrUpdateReadOnlyServerDnsRecords to a remote DC
Copyright (C) Andrew Bartlett 2010
Copyright (C) Andrew Tridgell 2010
based heavily on wb_sam_logon.c which is copyright:
Copyright (C) Volker Lendecke 2005
Copyright (C) Andrew Bartlett 2005
Copyright (C) Stefan Metzmacher 2006
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 <tevent.h>
#include "../lib/util/tevent_ntstatus.h"
#include "libcli/composite/composite.h"
#include "winbind/wb_server.h"
#include "smbd/service_task.h"
#include "auth/credentials/credentials.h"
#include "libcli/auth/libcli_auth.h"
#include "librpc/gen_ndr/ndr_netlogon_c.h"
#include "librpc/gen_ndr/winbind.h"
struct wb_update_rodc_dns_state {
struct tevent_context *ev;
struct winbind_DsrUpdateReadOnlyServerDnsRecords *req;
struct wbsrv_domain *domain;
struct tevent_queue_entry *queue_entry;
struct netlogon_creds_CredentialState *creds_state;
struct netr_Authenticator auth1, auth2;
TALLOC_CTX *r_mem_ctx;
struct netr_DsrUpdateReadOnlyServerDnsRecords r;
};
static void wb_update_rodc_dns_recv_domain(struct composite_context *csubreq);
static void wb_sam_logon_queue_trigger(struct tevent_req *req, void *priv);
static void wb_update_rodc_dns_recv_response(struct tevent_req *subreq);
/*
Find the connection to the DC (or find an existing connection)
*/
struct tevent_req *wb_update_rodc_dns_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct wbsrv_service *service,
struct winbind_DsrUpdateReadOnlyServerDnsRecords *_req)
{
struct tevent_req *req;
struct wb_update_rodc_dns_state *state;
struct composite_context *csubreq;
req = tevent_req_create(mem_ctx, &state,
struct wb_update_rodc_dns_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->req = _req;
csubreq = wb_sid2domain_send(state, service, service->primary_sid);
if (tevent_req_nomem(csubreq, req)) {
return tevent_req_post(req, ev);
}
csubreq->async.fn = wb_update_rodc_dns_recv_domain;
csubreq->async.private_data = req;
return req;
}
/*
Having finished making the connection to the DC
Send of a DsrUpdateReadOnlyServerDnsRecords request to authenticate a user.
*/
static void wb_update_rodc_dns_recv_domain(struct composite_context *csubreq)
{
struct tevent_req *req =
talloc_get_type_abort(csubreq->async.private_data,
struct tevent_req);
struct wb_update_rodc_dns_state *state =
tevent_req_data(req,
struct wb_update_rodc_dns_state);
NTSTATUS status;
struct tevent_queue_entry *e;
status = wb_sid2domain_recv(csubreq, &state->domain);
if (tevent_req_nterror(req, status)) {
return;
}
/*
* Because of the netlogon_creds behavior we have to
* queue the netr_LogonSamLogon() calls
*/
e = tevent_queue_add_entry(state->domain->netlogon_queue,
state->ev,
req,
wb_sam_logon_queue_trigger,
NULL);
state->queue_entry = e;
}
static void wb_sam_logon_queue_trigger(struct tevent_req *req, void *priv)
{
struct wb_update_rodc_dns_state *state =
tevent_req_data(req,
struct wb_update_rodc_dns_state);
struct wbsrv_domain *domain = state->domain;
struct tevent_req *subreq;
state->creds_state = cli_credentials_get_netlogon_creds(domain->libnet_ctx->cred);
netlogon_creds_client_authenticator(state->creds_state, &state->auth1);
state->r.in.server_name = talloc_asprintf(state, "\\\\%s",
dcerpc_server_name(domain->netlogon_pipe));
if (tevent_req_nomem(state->r.in.server_name, req)) {
return;
}
state->r.in.computer_name = cli_credentials_get_workstation(domain->libnet_ctx->cred);
state->r.in.credential = &state->auth1;
state->r.out.return_authenticator = &state->auth2;
state->r.in.site_name = state->req->in.site_name;
state->r.in.dns_ttl = state->req->in.dns_ttl;
state->r.in.dns_names = state->req->in.dns_names;
state->r.out.dns_names = state->req->in.dns_names;
/*
* use a new talloc context for the DsrUpdateReadOnlyServerDnsRecords call
* because then we can just to a talloc_steal on this context
* in the final _recv() function to give the caller all the content of
* the s->r.out.dns_names
*/
state->r_mem_ctx = talloc_new(state);
if (tevent_req_nomem(state->r_mem_ctx, req)) {
return;
}
subreq = dcerpc_netr_DsrUpdateReadOnlyServerDnsRecords_r_send(state,
state->ev,
domain->netlogon_pipe->binding_handle,
&state->r);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, wb_update_rodc_dns_recv_response, req);
}
/*
NTLM Authentication
Check the DsrUpdateReadOnlyServerDnsRecords reply and decrypt the session keys
*/
static void wb_update_rodc_dns_recv_response(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct wb_update_rodc_dns_state *state =
tevent_req_data(req,
struct wb_update_rodc_dns_state);
NTSTATUS status;
bool ok;
status = dcerpc_netr_DsrUpdateReadOnlyServerDnsRecords_r_recv(subreq,
state->r_mem_ctx);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
if (tevent_req_nterror(req, state->r.out.result)) {
return;
}
if (state->r.out.return_authenticator == NULL) {
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
return;
}
ok = netlogon_creds_client_check(state->creds_state,
&state->r.out.return_authenticator->cred);
if (!ok) {
DEBUG(0, ("Credentials check failed!\n"));
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
return;
}
/*
* we do not need the netlogon_creds lock anymore
*/
TALLOC_FREE(state->queue_entry);
tevent_req_done(req);
}
NTSTATUS wb_update_rodc_dns_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
struct winbind_DsrUpdateReadOnlyServerDnsRecords *_req)
{
struct wb_update_rodc_dns_state *state =
tevent_req_data(req,
struct wb_update_rodc_dns_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
talloc_steal(mem_ctx, state->r_mem_ctx);
_req->out.dns_names = state->r.out.dns_names;
tevent_req_received(req);
return NT_STATUS_OK;
}
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