2 Unix SMB/CIFS implementation.
4 A composite API for initializing a domain
6 Copyright (C) Volker Lendecke 2005
7 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2007
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "libcli/composite/composite.h"
25 #include "libcli/smb_composite/smb_composite.h"
26 #include "winbind/wb_server.h"
27 #include "winbind/wb_async_helpers.h"
28 #include "winbind/wb_helper.h"
29 #include "smbd/service_task.h"
30 #include "librpc/gen_ndr/ndr_netlogon.h"
31 #include "librpc/gen_ndr/ndr_lsa_c.h"
32 #include "librpc/gen_ndr/ndr_samr_c.h"
33 #include "libcli/libcli.h"
35 #include "libcli/auth/credentials.h"
36 #include "libcli/security/security.h"
38 #include "libcli/ldap/ldap_client.h"
40 #include "auth/credentials/credentials.h"
41 #include "param/param.h"
44 * Initialize a domain:
46 * - With schannel credentials, try to open the SMB connection and
47 * NETLOGON pipe with the machine creds. This works against W2k3SP1
48 * with an NTLMSSP session setup. Fall back to anonymous (for the CIFS level).
50 * - If we have schannel creds, do the auth2 and open the schannel'ed netlogon
53 * - Open LSA. If we have machine creds, try to open with SPNEGO or NTLMSSP. Fall back
56 * - With queryinfopolicy, verify that we're talking to the right domain
58 * A bit complex, but with all the combinations I think it's the best we can
59 * get. NT4, W2k3 and W2k all have different combinations, but in the end we
60 * have a signed&sealed lsa connection on all of them.
62 * Not sure if it is overkill, but it seems to work.
65 struct init_domain_state {
66 struct composite_context *ctx;
67 struct wbsrv_domain *domain;
68 struct wbsrv_service *service;
70 struct lsa_ObjectAttribute objectattr;
71 struct lsa_OpenPolicy2 lsa_openpolicy;
72 struct lsa_QueryInfoPolicy queryinfo;
75 static void init_domain_recv_netlogonpipe(struct composite_context *ctx);
76 static void init_domain_recv_lsa_pipe(struct composite_context *ctx);
77 static void init_domain_recv_lsa_policy(struct rpc_request *req);
78 static void init_domain_recv_queryinfo(struct rpc_request *req);
79 static void init_domain_recv_ldapconn(struct composite_context *ctx);
80 static void init_domain_recv_samr(struct composite_context *ctx);
82 static struct dcerpc_binding *init_domain_binding(struct init_domain_state *state,
83 const struct ndr_interface_table *table)
85 struct dcerpc_binding *binding;
88 /* Make a binding string */
90 char *s = talloc_asprintf(state, "ncacn_np:%s", state->domain->dc_name);
91 if (s == NULL) return NULL;
92 status = dcerpc_parse_binding(state, s, &binding);
94 if (!NT_STATUS_IS_OK(status)) {
99 /* Alter binding to contain hostname, but also address (so we don't look it up twice) */
100 binding->target_hostname = state->domain->dc_name;
101 binding->host = state->domain->dc_address;
103 /* This shouldn't make a network call, as the mappings for named pipes are well known */
104 status = dcerpc_epm_map_binding(binding, binding, table, state->service->task->event_ctx,
105 state->service->task->lp_ctx);
106 if (!NT_STATUS_IS_OK(status)) {
113 struct composite_context *wb_init_domain_send(TALLOC_CTX *mem_ctx,
114 struct wbsrv_service *service,
115 struct wb_dom_info *dom_info)
117 struct composite_context *result, *ctx;
118 struct init_domain_state *state;
120 result = composite_create(mem_ctx, service->task->event_ctx);
121 if (result == NULL) goto failed;
123 state = talloc_zero(result, struct init_domain_state);
124 if (state == NULL) goto failed;
126 result->private_data = state;
128 state->service = service;
130 state->domain = talloc(state, struct wbsrv_domain);
131 if (state->domain == NULL) goto failed;
133 state->domain->info = talloc_reference(state->domain, dom_info);
134 if (state->domain->info == NULL) goto failed;
136 /* Caller should check, but to be safe: */
137 if (dom_info->num_dcs < 1) {
141 /* For now, we just pick the first. The next step will be to
142 * walk the entire list. Also need to fix finddcs() to return
144 state->domain->dc_name = dom_info->dcs[0].name;
145 state->domain->dc_address = dom_info->dcs[0].address;
147 state->domain->libnet_ctx = libnet_context_init(service->task->event_ctx,
148 service->task->lp_ctx);
150 /* Create a credentials structure */
151 state->domain->libnet_ctx->cred = cli_credentials_init(state->domain);
152 if (state->domain->libnet_ctx->cred == NULL) goto failed;
154 cli_credentials_set_event_context(state->domain->libnet_ctx->cred, service->task->event_ctx);
156 cli_credentials_set_conf(state->domain->libnet_ctx->cred, service->task->lp_ctx);
158 /* Connect the machine account to the credentials */
160 cli_credentials_set_machine_account(state->domain->libnet_ctx->cred);
161 if (!NT_STATUS_IS_OK(state->ctx->status)) goto failed;
163 state->domain->netlogon_binding = init_domain_binding(state, &ndr_table_netlogon);
165 state->domain->netlogon_pipe = NULL;
167 if ((!cli_credentials_is_anonymous(state->domain->libnet_ctx->cred)) &&
168 ((lp_server_role(service->task->lp_ctx) == ROLE_DOMAIN_MEMBER) ||
169 (lp_server_role(service->task->lp_ctx) == ROLE_DOMAIN_CONTROLLER)) &&
170 (dom_sid_equal(state->domain->info->sid,
171 state->service->primary_sid))) {
172 state->domain->netlogon_binding->flags |= DCERPC_SCHANNEL;
174 /* For debugging, it can be a real pain if all the traffic is encrypted */
175 if (lp_winbind_sealed_pipes(service->task->lp_ctx)) {
176 state->domain->netlogon_binding->flags |= (DCERPC_SIGN | DCERPC_SEAL );
178 state->domain->netlogon_binding->flags |= (DCERPC_SIGN);
182 /* No encryption on anonymous pipes */
184 ctx = dcerpc_pipe_connect_b_send(state, state->domain->netlogon_binding,
186 state->domain->libnet_ctx->cred,
187 service->task->event_ctx,
188 service->task->lp_ctx);
190 if (composite_nomem(ctx, state->ctx)) {
194 composite_continue(state->ctx, ctx, init_domain_recv_netlogonpipe,
202 /* Having make a netlogon connection (possibly secured with schannel),
203 * make an LSA connection to the same DC, on the same IPC$ share */
204 static void init_domain_recv_netlogonpipe(struct composite_context *ctx)
206 struct init_domain_state *state =
207 talloc_get_type(ctx->async.private_data,
208 struct init_domain_state);
210 state->ctx->status = dcerpc_pipe_connect_b_recv(ctx, state->domain,
211 &state->domain->netlogon_pipe);
213 if (!composite_is_ok(state->ctx)) {
214 talloc_free(state->domain->netlogon_binding);
217 talloc_steal(state->domain->netlogon_pipe, state->domain->netlogon_binding);
219 state->domain->lsa_binding = init_domain_binding(state, &ndr_table_lsarpc);
221 /* For debugging, it can be a real pain if all the traffic is encrypted */
222 if (lp_winbind_sealed_pipes(state->service->task->lp_ctx)) {
223 state->domain->lsa_binding->flags |= (DCERPC_SIGN | DCERPC_SEAL );
225 state->domain->lsa_binding->flags |= (DCERPC_SIGN);
228 state->domain->libnet_ctx->lsa.pipe = NULL;
230 /* this will make the secondary connection on the same IPC$ share,
231 secured with SPNEGO or NTLMSSP */
232 ctx = dcerpc_secondary_auth_connection_send(state->domain->netlogon_pipe,
233 state->domain->lsa_binding,
235 state->domain->libnet_ctx->cred,
236 state->domain->libnet_ctx->lp_ctx
238 composite_continue(state->ctx, ctx, init_domain_recv_lsa_pipe, state);
241 static bool retry_with_schannel(struct init_domain_state *state,
242 struct dcerpc_binding *binding,
243 const struct ndr_interface_table *table,
244 void (*continuation)(struct composite_context *))
246 struct composite_context *ctx;
247 state->ctx->status = NT_STATUS_OK;
248 if (state->domain->netlogon_binding->flags & DCERPC_SCHANNEL
249 && !(binding->flags & DCERPC_SCHANNEL)) {
250 /* Opening a policy handle failed, perhaps it was
251 * because we don't get a 'wrong password' error on
254 /* Try again with schannel */
255 binding->flags |= DCERPC_SCHANNEL;
257 /* Try again, likewise on the same IPC$ share,
258 secured with SCHANNEL */
259 ctx = dcerpc_secondary_auth_connection_send(state->domain->netlogon_pipe,
262 state->domain->libnet_ctx->cred,
263 state->domain->libnet_ctx->lp_ctx);
264 composite_continue(state->ctx, ctx, continuation, state);
270 /* We should now have either an authenticated LSA pipe, or an error.
271 * On success, open a policy handle
273 static void init_domain_recv_lsa_pipe(struct composite_context *ctx)
275 struct rpc_request *req;
276 struct init_domain_state *state =
277 talloc_get_type(ctx->async.private_data,
278 struct init_domain_state);
280 state->ctx->status = dcerpc_secondary_auth_connection_recv(ctx, state->domain,
281 &state->domain->libnet_ctx->lsa.pipe);
282 if (NT_STATUS_EQUAL(state->ctx->status, NT_STATUS_LOGON_FAILURE)) {
283 if (retry_with_schannel(state, state->domain->lsa_binding,
285 init_domain_recv_lsa_pipe)) {
289 if (!composite_is_ok(state->ctx)) return;
291 talloc_steal(state->domain->libnet_ctx, state->domain->libnet_ctx->lsa.pipe);
292 talloc_steal(state->domain->libnet_ctx->lsa.pipe, state->domain->lsa_binding);
293 state->domain->libnet_ctx->lsa.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
294 state->domain->libnet_ctx->lsa.name = state->domain->info->name;
296 ZERO_STRUCT(state->domain->libnet_ctx->lsa.handle);
297 state->lsa_openpolicy.in.system_name =
298 talloc_asprintf(state, "\\\\%s",
299 dcerpc_server_name(state->domain->libnet_ctx->lsa.pipe));
300 ZERO_STRUCT(state->objectattr);
301 state->lsa_openpolicy.in.attr = &state->objectattr;
302 state->lsa_openpolicy.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
303 state->lsa_openpolicy.out.handle = &state->domain->libnet_ctx->lsa.handle;
305 req = dcerpc_lsa_OpenPolicy2_send(state->domain->libnet_ctx->lsa.pipe, state,
306 &state->lsa_openpolicy);
308 composite_continue_rpc(state->ctx, req, init_domain_recv_lsa_policy, state);
311 /* Receive a policy handle (or not, and retry the authentication) and
312 * obtain some basic information about the domain */
314 static void init_domain_recv_lsa_policy(struct rpc_request *req)
316 struct init_domain_state *state =
317 talloc_get_type(req->async.private_data,
318 struct init_domain_state);
320 state->ctx->status = dcerpc_ndr_request_recv(req);
321 if ((!NT_STATUS_IS_OK(state->ctx->status)
322 || !NT_STATUS_IS_OK(state->lsa_openpolicy.out.result))) {
323 if (retry_with_schannel(state, state->domain->lsa_binding,
325 init_domain_recv_lsa_pipe)) {
329 if (!composite_is_ok(state->ctx)) return;
330 state->ctx->status = state->lsa_openpolicy.out.result;
331 if (!composite_is_ok(state->ctx)) return;
333 state->queryinfo.in.handle = &state->domain->libnet_ctx->lsa.handle;
334 state->queryinfo.in.level = LSA_POLICY_INFO_ACCOUNT_DOMAIN;
336 req = dcerpc_lsa_QueryInfoPolicy_send(state->domain->libnet_ctx->lsa.pipe, state,
338 composite_continue_rpc(state->ctx, req,
339 init_domain_recv_queryinfo, state);
342 static void init_domain_recv_queryinfo(struct rpc_request *req)
344 struct init_domain_state *state =
345 talloc_get_type(req->async.private_data, struct init_domain_state);
346 struct lsa_DomainInfo *dominfo;
347 struct composite_context *ctx;
349 state->ctx->status = dcerpc_ndr_request_recv(req);
350 if (!composite_is_ok(state->ctx)) return;
351 state->ctx->status = state->queryinfo.out.result;
352 if (!composite_is_ok(state->ctx)) return;
354 dominfo = &state->queryinfo.out.info->account_domain;
356 if (strcasecmp(state->domain->info->name, dominfo->name.string) != 0) {
357 DEBUG(2, ("Expected domain name %s, DC %s said %s\n",
358 state->domain->info->name,
359 dcerpc_server_name(state->domain->libnet_ctx->lsa.pipe),
360 dominfo->name.string));
361 composite_error(state->ctx, NT_STATUS_INVALID_DOMAIN_STATE);
365 if (!dom_sid_equal(state->domain->info->sid, dominfo->sid)) {
366 DEBUG(2, ("Expected domain sid %s, DC %s said %s\n",
367 dom_sid_string(state, state->domain->info->sid),
368 dcerpc_server_name(state->domain->libnet_ctx->lsa.pipe),
369 dom_sid_string(state, dominfo->sid)));
370 composite_error(state->ctx, NT_STATUS_INVALID_DOMAIN_STATE);
374 state->domain->samr_binding = init_domain_binding(state, &ndr_table_samr);
376 /* We want to use the same flags as the LSA pipe did (so, if
377 * it needed schannel, then we need that here too) */
378 state->domain->samr_binding->flags = state->domain->lsa_binding->flags;
380 state->domain->libnet_ctx->samr.pipe = NULL;
382 ctx = wb_connect_samr_send(state, state->domain);
383 composite_continue(state->ctx, ctx, init_domain_recv_samr, state);
386 /* Recv the SAMR details (SamrConnect and SamrOpenDomain handle) and
387 * open an LDAP connection */
388 static void init_domain_recv_samr(struct composite_context *ctx)
390 const char *ldap_url;
391 struct init_domain_state *state =
392 talloc_get_type(ctx->async.private_data,
393 struct init_domain_state);
395 state->ctx->status = wb_connect_samr_recv(
397 &state->domain->libnet_ctx->samr.pipe,
398 &state->domain->libnet_ctx->samr.handle,
399 &state->domain->libnet_ctx->samr.handle);
400 if (!composite_is_ok(state->ctx)) return;
402 talloc_steal(state->domain->libnet_ctx->samr.pipe, state->domain->samr_binding);
403 state->domain->libnet_ctx->samr.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
404 state->domain->libnet_ctx->samr.name = state->domain->info->name;
405 state->domain->libnet_ctx->samr.sid = state->domain->info->sid;
407 state->domain->ldap_conn =
408 ldap4_new_connection(state->domain, state->ctx->event_ctx);
409 composite_nomem(state->domain->ldap_conn, state->ctx);
411 ldap_url = talloc_asprintf(state, "ldap://%s/",
412 state->domain->dc_address);
413 composite_nomem(ldap_url, state->ctx);
415 ctx = ldap_connect_send(state->domain->ldap_conn, ldap_url);
416 composite_continue(state->ctx, ctx, init_domain_recv_ldapconn, state);
419 static void init_domain_recv_ldapconn(struct composite_context *ctx)
421 struct init_domain_state *state =
422 talloc_get_type(ctx->async.private_data,
423 struct init_domain_state);
425 state->ctx->status = ldap_connect_recv(ctx);
426 if (NT_STATUS_IS_OK(state->ctx->status)) {
427 state->domain->ldap_conn->host =
428 talloc_strdup(state->domain->ldap_conn,
429 state->domain->dc_name);
431 ldap_bind_sasl(state->domain->ldap_conn,
432 state->domain->libnet_ctx->cred,
433 state->domain->libnet_ctx->lp_ctx);
434 DEBUG(0, ("ldap_bind returned %s\n",
435 nt_errstr(state->ctx->status)));
438 composite_done(state->ctx);
441 NTSTATUS wb_init_domain_recv(struct composite_context *c,
443 struct wbsrv_domain **result)
445 NTSTATUS status = composite_wait(c);
446 if (NT_STATUS_IS_OK(status)) {
447 struct init_domain_state *state =
448 talloc_get_type(c->private_data,
449 struct init_domain_state);
450 *result = talloc_steal(mem_ctx, state->domain);
456 NTSTATUS wb_init_domain(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
457 struct wb_dom_info *dom_info,
458 struct wbsrv_domain **result)
460 struct composite_context *c =
461 wb_init_domain_send(mem_ctx, service, dom_info);
462 return wb_init_domain_recv(c, mem_ctx, result);