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_conf(state->domain->libnet_ctx->cred, service->task->lp_ctx);
156 /* Connect the machine account to the credentials */
158 cli_credentials_set_machine_account(state->domain->libnet_ctx->cred, state->domain->libnet_ctx->lp_ctx);
159 if (!NT_STATUS_IS_OK(state->ctx->status)) goto failed;
161 state->domain->netlogon_binding = init_domain_binding(state, &ndr_table_netlogon);
163 state->domain->netlogon_pipe = NULL;
165 if ((!cli_credentials_is_anonymous(state->domain->libnet_ctx->cred)) &&
166 ((lp_server_role(service->task->lp_ctx) == ROLE_DOMAIN_MEMBER) ||
167 (lp_server_role(service->task->lp_ctx) == ROLE_DOMAIN_CONTROLLER)) &&
168 (dom_sid_equal(state->domain->info->sid,
169 state->service->primary_sid))) {
170 state->domain->netlogon_binding->flags |= DCERPC_SCHANNEL;
172 /* For debugging, it can be a real pain if all the traffic is encrypted */
173 if (lp_winbind_sealed_pipes(service->task->lp_ctx)) {
174 state->domain->netlogon_binding->flags |= (DCERPC_SIGN | DCERPC_SEAL );
176 state->domain->netlogon_binding->flags |= (DCERPC_SIGN);
180 /* No encryption on anonymous pipes */
182 ctx = dcerpc_pipe_connect_b_send(state, state->domain->netlogon_binding,
184 state->domain->libnet_ctx->cred,
185 service->task->event_ctx,
186 service->task->lp_ctx);
188 if (composite_nomem(ctx, state->ctx)) {
192 composite_continue(state->ctx, ctx, init_domain_recv_netlogonpipe,
200 /* Having make a netlogon connection (possibly secured with schannel),
201 * make an LSA connection to the same DC, on the same IPC$ share */
202 static void init_domain_recv_netlogonpipe(struct composite_context *ctx)
204 struct init_domain_state *state =
205 talloc_get_type(ctx->async.private_data,
206 struct init_domain_state);
208 state->ctx->status = dcerpc_pipe_connect_b_recv(ctx, state->domain,
209 &state->domain->netlogon_pipe);
211 if (!composite_is_ok(state->ctx)) {
212 talloc_free(state->domain->netlogon_binding);
215 talloc_steal(state->domain->netlogon_pipe, state->domain->netlogon_binding);
217 state->domain->lsa_binding = init_domain_binding(state, &ndr_table_lsarpc);
219 /* For debugging, it can be a real pain if all the traffic is encrypted */
220 if (lp_winbind_sealed_pipes(state->service->task->lp_ctx)) {
221 state->domain->lsa_binding->flags |= (DCERPC_SIGN | DCERPC_SEAL );
223 state->domain->lsa_binding->flags |= (DCERPC_SIGN);
226 state->domain->libnet_ctx->lsa.pipe = NULL;
228 /* this will make the secondary connection on the same IPC$ share,
229 secured with SPNEGO or NTLMSSP */
230 ctx = dcerpc_secondary_auth_connection_send(state->domain->netlogon_pipe,
231 state->domain->lsa_binding,
233 state->domain->libnet_ctx->cred,
234 state->domain->libnet_ctx->lp_ctx
236 composite_continue(state->ctx, ctx, init_domain_recv_lsa_pipe, state);
239 static bool retry_with_schannel(struct init_domain_state *state,
240 struct dcerpc_binding *binding,
241 const struct ndr_interface_table *table,
242 void (*continuation)(struct composite_context *))
244 struct composite_context *ctx;
245 state->ctx->status = NT_STATUS_OK;
246 if (state->domain->netlogon_binding->flags & DCERPC_SCHANNEL
247 && !(binding->flags & DCERPC_SCHANNEL)) {
248 /* Opening a policy handle failed, perhaps it was
249 * because we don't get a 'wrong password' error on
252 /* Try again with schannel */
253 binding->flags |= DCERPC_SCHANNEL;
255 /* Try again, likewise on the same IPC$ share,
256 secured with SCHANNEL */
257 ctx = dcerpc_secondary_auth_connection_send(state->domain->netlogon_pipe,
260 state->domain->libnet_ctx->cred,
261 state->domain->libnet_ctx->lp_ctx);
262 composite_continue(state->ctx, ctx, continuation, state);
268 /* We should now have either an authenticated LSA pipe, or an error.
269 * On success, open a policy handle
271 static void init_domain_recv_lsa_pipe(struct composite_context *ctx)
273 struct rpc_request *req;
274 struct init_domain_state *state =
275 talloc_get_type(ctx->async.private_data,
276 struct init_domain_state);
278 state->ctx->status = dcerpc_secondary_auth_connection_recv(ctx, state->domain,
279 &state->domain->libnet_ctx->lsa.pipe);
280 if (NT_STATUS_EQUAL(state->ctx->status, NT_STATUS_LOGON_FAILURE)) {
281 if (retry_with_schannel(state, state->domain->lsa_binding,
283 init_domain_recv_lsa_pipe)) {
287 if (!composite_is_ok(state->ctx)) return;
289 talloc_steal(state->domain->libnet_ctx, state->domain->libnet_ctx->lsa.pipe);
290 talloc_steal(state->domain->libnet_ctx->lsa.pipe, state->domain->lsa_binding);
291 state->domain->libnet_ctx->lsa.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
292 state->domain->libnet_ctx->lsa.name = state->domain->info->name;
294 ZERO_STRUCT(state->domain->libnet_ctx->lsa.handle);
295 state->lsa_openpolicy.in.system_name =
296 talloc_asprintf(state, "\\\\%s",
297 dcerpc_server_name(state->domain->libnet_ctx->lsa.pipe));
298 ZERO_STRUCT(state->objectattr);
299 state->lsa_openpolicy.in.attr = &state->objectattr;
300 state->lsa_openpolicy.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
301 state->lsa_openpolicy.out.handle = &state->domain->libnet_ctx->lsa.handle;
303 req = dcerpc_lsa_OpenPolicy2_send(state->domain->libnet_ctx->lsa.pipe, state,
304 &state->lsa_openpolicy);
306 composite_continue_rpc(state->ctx, req, init_domain_recv_lsa_policy, state);
309 /* Receive a policy handle (or not, and retry the authentication) and
310 * obtain some basic information about the domain */
312 static void init_domain_recv_lsa_policy(struct rpc_request *req)
314 struct init_domain_state *state =
315 talloc_get_type(req->async.private_data,
316 struct init_domain_state);
318 state->ctx->status = dcerpc_ndr_request_recv(req);
319 if ((!NT_STATUS_IS_OK(state->ctx->status)
320 || !NT_STATUS_IS_OK(state->lsa_openpolicy.out.result))) {
321 if (retry_with_schannel(state, state->domain->lsa_binding,
323 init_domain_recv_lsa_pipe)) {
327 if (!composite_is_ok(state->ctx)) return;
328 state->ctx->status = state->lsa_openpolicy.out.result;
329 if (!composite_is_ok(state->ctx)) return;
331 state->queryinfo.in.handle = &state->domain->libnet_ctx->lsa.handle;
332 state->queryinfo.in.level = LSA_POLICY_INFO_ACCOUNT_DOMAIN;
334 req = dcerpc_lsa_QueryInfoPolicy_send(state->domain->libnet_ctx->lsa.pipe, state,
336 composite_continue_rpc(state->ctx, req,
337 init_domain_recv_queryinfo, state);
340 static void init_domain_recv_queryinfo(struct rpc_request *req)
342 struct init_domain_state *state =
343 talloc_get_type(req->async.private_data, struct init_domain_state);
344 struct lsa_DomainInfo *dominfo;
345 struct composite_context *ctx;
347 state->ctx->status = dcerpc_ndr_request_recv(req);
348 if (!composite_is_ok(state->ctx)) return;
349 state->ctx->status = state->queryinfo.out.result;
350 if (!composite_is_ok(state->ctx)) return;
352 dominfo = &state->queryinfo.out.info->account_domain;
354 if (strcasecmp(state->domain->info->name, dominfo->name.string) != 0) {
355 DEBUG(2, ("Expected domain name %s, DC %s said %s\n",
356 state->domain->info->name,
357 dcerpc_server_name(state->domain->libnet_ctx->lsa.pipe),
358 dominfo->name.string));
359 composite_error(state->ctx, NT_STATUS_INVALID_DOMAIN_STATE);
363 if (!dom_sid_equal(state->domain->info->sid, dominfo->sid)) {
364 DEBUG(2, ("Expected domain sid %s, DC %s said %s\n",
365 dom_sid_string(state, state->domain->info->sid),
366 dcerpc_server_name(state->domain->libnet_ctx->lsa.pipe),
367 dom_sid_string(state, dominfo->sid)));
368 composite_error(state->ctx, NT_STATUS_INVALID_DOMAIN_STATE);
372 state->domain->samr_binding = init_domain_binding(state, &ndr_table_samr);
374 /* We want to use the same flags as the LSA pipe did (so, if
375 * it needed schannel, then we need that here too) */
376 state->domain->samr_binding->flags = state->domain->lsa_binding->flags;
378 state->domain->libnet_ctx->samr.pipe = NULL;
380 ctx = wb_connect_samr_send(state, state->domain);
381 composite_continue(state->ctx, ctx, init_domain_recv_samr, state);
384 /* Recv the SAMR details (SamrConnect and SamrOpenDomain handle) and
385 * open an LDAP connection */
386 static void init_domain_recv_samr(struct composite_context *ctx)
388 const char *ldap_url;
389 struct init_domain_state *state =
390 talloc_get_type(ctx->async.private_data,
391 struct init_domain_state);
393 state->ctx->status = wb_connect_samr_recv(
395 &state->domain->libnet_ctx->samr.pipe,
396 &state->domain->libnet_ctx->samr.handle,
397 &state->domain->libnet_ctx->samr.handle);
398 if (!composite_is_ok(state->ctx)) return;
400 talloc_steal(state->domain->libnet_ctx->samr.pipe, state->domain->samr_binding);
401 state->domain->libnet_ctx->samr.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
402 state->domain->libnet_ctx->samr.name = state->domain->info->name;
403 state->domain->libnet_ctx->samr.sid = state->domain->info->sid;
405 state->domain->ldap_conn =
406 ldap4_new_connection(state->domain, state->domain->libnet_ctx->lp_ctx, state->ctx->event_ctx);
407 composite_nomem(state->domain->ldap_conn, state->ctx);
409 ldap_url = talloc_asprintf(state, "ldap://%s/",
410 state->domain->dc_address);
411 composite_nomem(ldap_url, state->ctx);
413 ctx = ldap_connect_send(state->domain->ldap_conn, ldap_url);
414 composite_continue(state->ctx, ctx, init_domain_recv_ldapconn, state);
417 static void init_domain_recv_ldapconn(struct composite_context *ctx)
419 struct init_domain_state *state =
420 talloc_get_type(ctx->async.private_data,
421 struct init_domain_state);
423 state->ctx->status = ldap_connect_recv(ctx);
424 if (NT_STATUS_IS_OK(state->ctx->status)) {
425 state->domain->ldap_conn->host =
426 talloc_strdup(state->domain->ldap_conn,
427 state->domain->dc_name);
429 ldap_bind_sasl(state->domain->ldap_conn,
430 state->domain->libnet_ctx->cred,
431 state->domain->libnet_ctx->lp_ctx);
432 DEBUG(0, ("ldap_bind returned %s\n",
433 nt_errstr(state->ctx->status)));
436 composite_done(state->ctx);
439 NTSTATUS wb_init_domain_recv(struct composite_context *c,
441 struct wbsrv_domain **result)
443 NTSTATUS status = composite_wait(c);
444 if (NT_STATUS_IS_OK(status)) {
445 struct init_domain_state *state =
446 talloc_get_type(c->private_data,
447 struct init_domain_state);
448 *result = talloc_steal(mem_ctx, state->domain);
454 NTSTATUS wb_init_domain(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
455 struct wb_dom_info *dom_info,
456 struct wbsrv_domain **result)
458 struct composite_context *c =
459 wb_init_domain_send(mem_ctx, service, dom_info);
460 return wb_init_domain_recv(c, mem_ctx, result);