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 if (!NT_STATUS_IS_OK(status)) {
112 struct composite_context *wb_init_domain_send(TALLOC_CTX *mem_ctx,
113 struct wbsrv_service *service,
114 struct wb_dom_info *dom_info)
116 struct composite_context *result, *ctx;
117 struct init_domain_state *state;
119 result = composite_create(mem_ctx, service->task->event_ctx);
120 if (result == NULL) goto failed;
122 state = talloc_zero(result, struct init_domain_state);
123 if (state == NULL) goto failed;
125 result->private_data = state;
127 state->service = service;
129 state->domain = talloc(state, struct wbsrv_domain);
130 if (state->domain == NULL) goto failed;
132 state->domain->info = talloc_reference(state->domain, dom_info);
133 if (state->domain->info == NULL) goto failed;
135 /* Caller should check, but to be safe: */
136 if (dom_info->num_dcs < 1) {
140 /* For now, we just pick the first. The next step will be to
141 * walk the entire list. Also need to fix finddcs() to return
143 state->domain->dc_name = dom_info->dcs[0].name;
144 state->domain->dc_address = dom_info->dcs[0].address;
146 state->domain->libnet_ctx = libnet_context_init(service->task->event_ctx);
148 /* Create a credentials structure */
149 state->domain->libnet_ctx->cred = cli_credentials_init(state->domain);
150 if (state->domain->libnet_ctx->cred == NULL) goto failed;
152 cli_credentials_set_event_context(state->domain->libnet_ctx->cred, service->task->event_ctx);
154 cli_credentials_set_conf(state->domain->libnet_ctx->cred, global_loadparm);
156 /* Connect the machine account to the credentials */
158 cli_credentials_set_machine_account(state->domain->libnet_ctx->cred);
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(global_loadparm) == ROLE_DOMAIN_MEMBER) ||
167 (lp_server_role(global_loadparm) == 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(global_loadparm)) {
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);
187 if (composite_nomem(ctx, state->ctx)) {
191 composite_continue(state->ctx, ctx, init_domain_recv_netlogonpipe,
199 /* Having make a netlogon connection (possibly secured with schannel),
200 * make an LSA connection to the same DC, on the same IPC$ share */
201 static void init_domain_recv_netlogonpipe(struct composite_context *ctx)
203 struct init_domain_state *state =
204 talloc_get_type(ctx->async.private_data,
205 struct init_domain_state);
207 state->ctx->status = dcerpc_pipe_connect_b_recv(ctx, state->domain,
208 &state->domain->netlogon_pipe);
210 if (!composite_is_ok(state->ctx)) {
211 talloc_free(state->domain->netlogon_binding);
214 talloc_steal(state->domain->netlogon_pipe, state->domain->netlogon_binding);
216 state->domain->lsa_binding = init_domain_binding(state, &ndr_table_lsarpc);
218 /* For debugging, it can be a real pain if all the traffic is encrypted */
219 if (lp_winbind_sealed_pipes(global_loadparm)) {
220 state->domain->lsa_binding->flags |= (DCERPC_SIGN | DCERPC_SEAL );
222 state->domain->lsa_binding->flags |= (DCERPC_SIGN);
225 state->domain->libnet_ctx->lsa.pipe = NULL;
227 /* this will make the secondary connection on the same IPC$ share,
228 secured with SPNEGO or NTLMSSP */
229 ctx = dcerpc_secondary_auth_connection_send(state->domain->netlogon_pipe,
230 state->domain->lsa_binding,
232 state->domain->libnet_ctx->cred
234 composite_continue(state->ctx, ctx, init_domain_recv_lsa_pipe, state);
237 static bool retry_with_schannel(struct init_domain_state *state,
238 struct dcerpc_binding *binding,
239 const struct ndr_interface_table *table,
240 void (*continuation)(struct composite_context *))
242 struct composite_context *ctx;
243 state->ctx->status = NT_STATUS_OK;
244 if (state->domain->netlogon_binding->flags & DCERPC_SCHANNEL
245 && !(binding->flags & DCERPC_SCHANNEL)) {
246 /* Opening a policy handle failed, perhaps it was
247 * because we don't get a 'wrong password' error on
250 /* Try again with schannel */
251 binding->flags |= DCERPC_SCHANNEL;
253 /* Try again, likewise on the same IPC$ share,
254 secured with SCHANNEL */
255 ctx = dcerpc_secondary_auth_connection_send(state->domain->netlogon_pipe,
258 state->domain->libnet_ctx->cred);
259 composite_continue(state->ctx, ctx, continuation, state);
265 /* We should now have either an authenticated LSA pipe, or an error.
266 * On success, open a policy handle
268 static void init_domain_recv_lsa_pipe(struct composite_context *ctx)
270 struct rpc_request *req;
271 struct init_domain_state *state =
272 talloc_get_type(ctx->async.private_data,
273 struct init_domain_state);
275 state->ctx->status = dcerpc_secondary_auth_connection_recv(ctx, state->domain,
276 &state->domain->libnet_ctx->lsa.pipe);
277 if (NT_STATUS_EQUAL(state->ctx->status, NT_STATUS_LOGON_FAILURE)) {
278 if (retry_with_schannel(state, state->domain->lsa_binding,
280 init_domain_recv_lsa_pipe)) {
284 if (!composite_is_ok(state->ctx)) return;
286 talloc_steal(state->domain->libnet_ctx, state->domain->libnet_ctx->lsa.pipe);
287 talloc_steal(state->domain->libnet_ctx->lsa.pipe, state->domain->lsa_binding);
288 state->domain->libnet_ctx->lsa.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
289 state->domain->libnet_ctx->lsa.name = state->domain->info->name;
291 ZERO_STRUCT(state->domain->libnet_ctx->lsa.handle);
292 state->lsa_openpolicy.in.system_name =
293 talloc_asprintf(state, "\\\\%s",
294 dcerpc_server_name(state->domain->libnet_ctx->lsa.pipe));
295 ZERO_STRUCT(state->objectattr);
296 state->lsa_openpolicy.in.attr = &state->objectattr;
297 state->lsa_openpolicy.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
298 state->lsa_openpolicy.out.handle = &state->domain->libnet_ctx->lsa.handle;
300 req = dcerpc_lsa_OpenPolicy2_send(state->domain->libnet_ctx->lsa.pipe, state,
301 &state->lsa_openpolicy);
303 composite_continue_rpc(state->ctx, req, init_domain_recv_lsa_policy, state);
306 /* Receive a policy handle (or not, and retry the authentication) and
307 * obtain some basic information about the domain */
309 static void init_domain_recv_lsa_policy(struct rpc_request *req)
311 struct init_domain_state *state =
312 talloc_get_type(req->async.private_data,
313 struct init_domain_state);
315 state->ctx->status = dcerpc_ndr_request_recv(req);
316 if ((!NT_STATUS_IS_OK(state->ctx->status)
317 || !NT_STATUS_IS_OK(state->lsa_openpolicy.out.result))) {
318 if (retry_with_schannel(state, state->domain->lsa_binding,
320 init_domain_recv_lsa_pipe)) {
324 if (!composite_is_ok(state->ctx)) return;
325 state->ctx->status = state->lsa_openpolicy.out.result;
326 if (!composite_is_ok(state->ctx)) return;
328 state->queryinfo.in.handle = &state->domain->libnet_ctx->lsa.handle;
329 state->queryinfo.in.level = LSA_POLICY_INFO_ACCOUNT_DOMAIN;
331 req = dcerpc_lsa_QueryInfoPolicy_send(state->domain->libnet_ctx->lsa.pipe, state,
333 composite_continue_rpc(state->ctx, req,
334 init_domain_recv_queryinfo, state);
337 static void init_domain_recv_queryinfo(struct rpc_request *req)
339 struct init_domain_state *state =
340 talloc_get_type(req->async.private_data, struct init_domain_state);
341 struct lsa_DomainInfo *dominfo;
342 struct composite_context *ctx;
344 state->ctx->status = dcerpc_ndr_request_recv(req);
345 if (!composite_is_ok(state->ctx)) return;
346 state->ctx->status = state->queryinfo.out.result;
347 if (!composite_is_ok(state->ctx)) return;
349 dominfo = &state->queryinfo.out.info->account_domain;
351 if (strcasecmp(state->domain->info->name, dominfo->name.string) != 0) {
352 DEBUG(2, ("Expected domain name %s, DC %s said %s\n",
353 state->domain->info->name,
354 dcerpc_server_name(state->domain->libnet_ctx->lsa.pipe),
355 dominfo->name.string));
356 composite_error(state->ctx, NT_STATUS_INVALID_DOMAIN_STATE);
360 if (!dom_sid_equal(state->domain->info->sid, dominfo->sid)) {
361 DEBUG(2, ("Expected domain sid %s, DC %s said %s\n",
362 dom_sid_string(state, state->domain->info->sid),
363 dcerpc_server_name(state->domain->libnet_ctx->lsa.pipe),
364 dom_sid_string(state, dominfo->sid)));
365 composite_error(state->ctx, NT_STATUS_INVALID_DOMAIN_STATE);
369 state->domain->samr_binding = init_domain_binding(state, &ndr_table_samr);
371 /* We want to use the same flags as the LSA pipe did (so, if
372 * it needed schannel, then we need that here too) */
373 state->domain->samr_binding->flags = state->domain->lsa_binding->flags;
375 state->domain->libnet_ctx->samr.pipe = NULL;
377 ctx = wb_connect_samr_send(state, state->domain);
378 composite_continue(state->ctx, ctx, init_domain_recv_samr, state);
381 /* Recv the SAMR details (SamrConnect and SamrOpenDomain handle) and
382 * open an LDAP connection */
383 static void init_domain_recv_samr(struct composite_context *ctx)
385 const char *ldap_url;
386 struct init_domain_state *state =
387 talloc_get_type(ctx->async.private_data,
388 struct init_domain_state);
390 state->ctx->status = wb_connect_samr_recv(
392 &state->domain->libnet_ctx->samr.pipe,
393 &state->domain->libnet_ctx->samr.handle,
394 &state->domain->libnet_ctx->samr.handle);
395 if (!composite_is_ok(state->ctx)) return;
397 talloc_steal(state->domain->libnet_ctx->samr.pipe, state->domain->samr_binding);
398 state->domain->libnet_ctx->samr.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
399 state->domain->libnet_ctx->samr.name = state->domain->info->name;
400 state->domain->libnet_ctx->samr.sid = state->domain->info->sid;
402 state->domain->ldap_conn =
403 ldap4_new_connection(state->domain, state->ctx->event_ctx);
404 composite_nomem(state->domain->ldap_conn, state->ctx);
406 ldap_url = talloc_asprintf(state, "ldap://%s/",
407 state->domain->dc_address);
408 composite_nomem(ldap_url, state->ctx);
410 ctx = ldap_connect_send(state->domain->ldap_conn, ldap_url);
411 composite_continue(state->ctx, ctx, init_domain_recv_ldapconn, state);
414 static void init_domain_recv_ldapconn(struct composite_context *ctx)
416 struct init_domain_state *state =
417 talloc_get_type(ctx->async.private_data,
418 struct init_domain_state);
420 state->ctx->status = ldap_connect_recv(ctx);
421 if (NT_STATUS_IS_OK(state->ctx->status)) {
422 state->domain->ldap_conn->host =
423 talloc_strdup(state->domain->ldap_conn,
424 state->domain->dc_name);
426 ldap_bind_sasl(state->domain->ldap_conn,
427 state->domain->libnet_ctx->cred);
428 DEBUG(0, ("ldap_bind returned %s\n",
429 nt_errstr(state->ctx->status)));
432 composite_done(state->ctx);
435 NTSTATUS wb_init_domain_recv(struct composite_context *c,
437 struct wbsrv_domain **result)
439 NTSTATUS status = composite_wait(c);
440 if (NT_STATUS_IS_OK(status)) {
441 struct init_domain_state *state =
442 talloc_get_type(c->private_data,
443 struct init_domain_state);
444 *result = talloc_steal(mem_ctx, state->domain);
450 NTSTATUS wb_init_domain(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
451 struct wb_dom_info *dom_info,
452 struct wbsrv_domain **result)
454 struct composite_context *c =
455 wb_init_domain_send(mem_ctx, service, dom_info);
456 return wb_init_domain_recv(c, mem_ctx, result);