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646012954c
metze
244 lines
6.8 KiB
C
244 lines
6.8 KiB
C
/*
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Unix SMB/CIFS implementation.
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Do a netr_LogonSamLogon to a remote DC
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Copyright (C) Volker Lendecke 2005
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
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Copyright (C) Stefan Metzmacher 2006
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include <tevent.h>
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#include "../lib/util/tevent_ntstatus.h"
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#include "libcli/composite/composite.h"
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#include "winbind/wb_server.h"
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#include "smbd/service_task.h"
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#include "auth/credentials/credentials.h"
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#include "libcli/auth/libcli_auth.h"
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#include "librpc/gen_ndr/ndr_netlogon_c.h"
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#include "librpc/gen_ndr/winbind.h"
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struct wb_sam_logon_state {
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struct tevent_context *ev;
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struct winbind_SamLogon *req;
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struct wbsrv_domain *domain;
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struct tevent_queue_entry *queue_entry;
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struct netlogon_creds_CredentialState *creds_state;
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struct netr_Authenticator auth1, auth2;
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TALLOC_CTX *r_mem_ctx;
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struct netr_LogonSamLogon r;
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};
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static void wb_sam_logon_recv_domain(struct composite_context *ctx);
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static void wb_sam_logon_queue_trigger(struct tevent_req *req, void *priv);
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static void wb_sam_logon_recv_samlogon(struct tevent_req *subreq);
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/*
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Find the connection to the DC (or find an existing connection)
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*/
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struct tevent_req *wb_sam_logon_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct wbsrv_service *service,
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struct winbind_SamLogon *_req)
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{
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struct tevent_req *req;
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struct wb_sam_logon_state *state;
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struct composite_context *csubreq;
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req = tevent_req_create(mem_ctx, &state,
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struct wb_sam_logon_state);
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if (req == NULL) {
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return NULL;
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}
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state->ev = ev;
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state->req = _req;
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csubreq = wb_sid2domain_send(state, service, service->primary_sid);
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if (tevent_req_nomem(csubreq, req)) {
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return tevent_req_post(req, ev);
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}
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csubreq->async.fn = wb_sam_logon_recv_domain;
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csubreq->async.private_data = req;
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return req;
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}
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/*
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Having finished making the connection to the DC
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Send of a SamLogon request to authenticate a user.
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*/
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static void wb_sam_logon_recv_domain(struct composite_context *csubreq)
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{
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struct tevent_req *req =
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talloc_get_type_abort(csubreq->async.private_data,
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struct tevent_req);
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struct wb_sam_logon_state *state =
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tevent_req_data(req,
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struct wb_sam_logon_state);
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NTSTATUS status;
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struct tevent_queue_entry *e;
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status = wb_sid2domain_recv(csubreq, &state->domain);
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if (tevent_req_nterror(req, status)) {
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return;
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}
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/*
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* Because of the netlogon_creds behavior we have to
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* queue the netr_LogonSamLogon() calls
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*/
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e = tevent_queue_add_entry(state->domain->netlogon_queue,
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state->ev,
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req,
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wb_sam_logon_queue_trigger,
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NULL);
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state->queue_entry = e;
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}
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static void wb_sam_logon_queue_trigger(struct tevent_req *req, void *priv)
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{
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struct wb_sam_logon_state *state =
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tevent_req_data(req,
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struct wb_sam_logon_state);
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struct wbsrv_domain *domain = state->domain;
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struct tevent_req *subreq;
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state->creds_state = cli_credentials_get_netlogon_creds(domain->libnet_ctx->cred);
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netlogon_creds_client_authenticator(state->creds_state, &state->auth1);
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state->r.in.server_name = talloc_asprintf(state, "\\\\%s",
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dcerpc_server_name(domain->netlogon_pipe));
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if (tevent_req_nomem(state->r.in.server_name, req)) {
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return;
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}
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state->r.in.computer_name = cli_credentials_get_workstation(domain->libnet_ctx->cred);
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state->r.in.credential = &state->auth1;
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state->r.in.return_authenticator = &state->auth2;
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state->r.in.logon_level = state->req->in.logon_level;
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state->r.in.logon = &state->req->in.logon;
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state->r.in.validation_level = state->req->in.validation_level;
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state->r.out.return_authenticator = NULL;
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state->r.out.validation = talloc(state, union netr_Validation);
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if (tevent_req_nomem(state->r.out.validation, req)) {
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return;
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}
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state->r.out.authoritative = talloc(state, uint8_t);
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if (tevent_req_nomem(state->r.out.authoritative, req)) {
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return;
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}
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/*
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* use a new talloc context for the LogonSamLogon call
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* because then we can just to a talloc_steal on this context
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* in the final _recv() function to give the caller all the content of
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* the state->r.out.validation
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*/
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state->r_mem_ctx = talloc_new(state);
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if (tevent_req_nomem(state->r_mem_ctx, req)) {
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return;
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}
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subreq = dcerpc_netr_LogonSamLogon_r_send(state,
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state->ev,
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domain->netlogon_pipe->binding_handle,
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&state->r);
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if (tevent_req_nomem(subreq, req)) {
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return;
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}
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tevent_req_set_callback(subreq, wb_sam_logon_recv_samlogon, req);
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}
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/*
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NTLM Authentication
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Check the SamLogon reply and decrypt the session keys
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*/
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static void wb_sam_logon_recv_samlogon(struct tevent_req *subreq)
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{
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struct tevent_req *req =
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tevent_req_callback_data(subreq,
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struct tevent_req);
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struct wb_sam_logon_state *state =
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tevent_req_data(req,
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struct wb_sam_logon_state);
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NTSTATUS status;
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bool ok;
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status = dcerpc_netr_LogonSamLogon_r_recv(subreq, state->r_mem_ctx);
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TALLOC_FREE(subreq);
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if (tevent_req_nterror(req, status)) {
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return;
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}
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if (tevent_req_nterror(req, state->r.out.result)) {
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return;
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}
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if (state->r.out.return_authenticator == NULL) {
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tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
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return;
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}
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ok = netlogon_creds_client_check(state->creds_state,
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&state->r.out.return_authenticator->cred);
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if (!ok) {
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DEBUG(0, ("Credentials check failed!\n"));
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tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
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return;
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}
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/* Decrypt the session keys before we reform the info3, so the
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* person on the other end of winbindd pipe doesn't have to.
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* They won't have the encryption key anyway */
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netlogon_creds_decrypt_samlogon(state->creds_state,
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state->r.in.validation_level,
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state->r.out.validation);
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/*
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* we do not need the netlogon_creds lock anymore
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*/
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TALLOC_FREE(state->queue_entry);
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tevent_req_done(req);
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}
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NTSTATUS wb_sam_logon_recv(struct tevent_req *req,
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TALLOC_CTX *mem_ctx,
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struct winbind_SamLogon *_req)
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{
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struct wb_sam_logon_state *state =
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tevent_req_data(req,
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struct wb_sam_logon_state);
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NTSTATUS status;
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if (tevent_req_is_nterror(req, &status)) {
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tevent_req_received(req);
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return status;
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}
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talloc_steal(mem_ctx, state->r_mem_ctx);
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_req->out.validation = *state->r.out.validation;
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_req->out.authoritative = 1;
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tevent_req_received(req);
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return NT_STATUS_OK;
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}
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