source: trunk/server/source3/utils/net_rpc_join.c

Last change on this file was 862, checked in by Silvan Scherrer, 11 years ago

Samba Server: update trunk to 3.6.23
File size: 15.7 KB
Line 
1/*
2 Samba Unix/Linux SMB client library
3 Distributed SMB/CIFS Server Management Utility
4 Copyright (C) 2001 Andrew Bartlett (abartlet@samba.org)
5 Copyright (C) Tim Potter 2001
6 Copyright (C) 2008 Guenther Deschner
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20
21#include "includes.h"
22#include "utils/net.h"
23#include "rpc_client/cli_pipe.h"
24#include "../libcli/auth/libcli_auth.h"
25#include "../librpc/gen_ndr/ndr_lsa_c.h"
26#include "rpc_client/cli_lsarpc.h"
27#include "../librpc/gen_ndr/ndr_samr_c.h"
28#include "rpc_client/init_samr.h"
29#include "../librpc/gen_ndr/ndr_netlogon.h"
30#include "rpc_client/cli_netlogon.h"
31#include "secrets.h"
32#include "rpc_client/init_lsa.h"
33#include "libsmb/libsmb.h"
34
35/* Macro for checking RPC error codes to make things more readable */
36
37#define CHECK_RPC_ERR(rpc, msg) \
38 if (!NT_STATUS_IS_OK(status = rpc)) { \
39 DEBUG(0, (msg ": %s\n", nt_errstr(status))); \
40 goto done; \
41 }
42
43#define CHECK_DCERPC_ERR(rpc, msg) \
44 if (!NT_STATUS_IS_OK(status = rpc)) { \
45 DEBUG(0, (msg ": %s\n", nt_errstr(status))); \
46 goto done; \
47 } \
48 if (!NT_STATUS_IS_OK(result)) { \
49 status = result; \
50 DEBUG(0, (msg ": %s\n", nt_errstr(result))); \
51 goto done; \
52 }
53
54
55#define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
56 if (!NT_STATUS_IS_OK(status = rpc)) { \
57 DEBUG(0, debug_args); \
58 goto done; \
59 }
60
61#define CHECK_DCERPC_ERR_DEBUG(rpc, debug_args) \
62 if (!NT_STATUS_IS_OK(status = rpc)) { \
63 DEBUG(0, debug_args); \
64 goto done; \
65 } \
66 if (!NT_STATUS_IS_OK(result)) { \
67 status = result; \
68 DEBUG(0, debug_args); \
69 goto done; \
70 }
71
72
73/**
74 * confirm that a domain join is still valid
75 *
76 * @return A shell status integer (0 for success)
77 *
78 **/
79NTSTATUS net_rpc_join_ok(struct net_context *c, const char *domain,
80 const char *server, struct sockaddr_storage *pss)
81{
82 enum security_types sec;
83 unsigned int conn_flags = NET_FLAGS_PDC;
84 uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
85 struct cli_state *cli = NULL;
86 struct rpc_pipe_client *pipe_hnd = NULL;
87 struct rpc_pipe_client *netlogon_pipe = NULL;
88 NTSTATUS ntret = NT_STATUS_UNSUCCESSFUL;
89
90 sec = (enum security_types)lp_security();
91
92 if (sec == SEC_ADS) {
93 /* Connect to IPC$ using machine account's credentials. We don't use anonymous
94 connection here, as it may be denied by server's local policy. */
95 net_use_machine_account(c);
96
97 } else {
98 /* some servers (e.g. WinNT) don't accept machine-authenticated
99 smb connections */
100 conn_flags |= NET_FLAGS_ANONYMOUS;
101 }
102
103 /* Connect to remote machine */
104 ntret = net_make_ipc_connection_ex(c, domain, server, pss, conn_flags,
105 &cli);
106 if (!NT_STATUS_IS_OK(ntret)) {
107 return ntret;
108 }
109
110 /* Setup the creds as though we're going to do schannel... */
111 ntret = get_schannel_session_key(cli, domain, &neg_flags,
112 &netlogon_pipe);
113
114 /* We return NT_STATUS_INVALID_NETWORK_RESPONSE if the server is refusing
115 to negotiate schannel, but the creds were set up ok. That'll have to do. */
116
117 if (!NT_STATUS_IS_OK(ntret)) {
118 if (NT_STATUS_EQUAL(ntret, NT_STATUS_INVALID_NETWORK_RESPONSE)) {
119 cli_shutdown(cli);
120 return NT_STATUS_OK;
121 } else {
122 DEBUG(0,("net_rpc_join_ok: failed to get schannel session "
123 "key from server %s for domain %s. Error was %s\n",
124 cli->desthost, domain, nt_errstr(ntret) ));
125 cli_shutdown(cli);
126 return ntret;
127 }
128 }
129
130 /* Only do the rest of the schannel test if the client is allowed to do this. */
131 if (!lp_client_schannel()) {
132 cli_shutdown(cli);
133 /* We're good... */
134 return ntret;
135 }
136
137 ntret = cli_rpc_pipe_open_schannel_with_key(
138 cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
139 DCERPC_AUTH_LEVEL_PRIVACY,
140 domain, &netlogon_pipe->dc, &pipe_hnd);
141
142 if (!NT_STATUS_IS_OK(ntret)) {
143 DEBUG(0,("net_rpc_join_ok: failed to open schannel session "
144 "on netlogon pipe to server %s for domain %s. Error was %s\n",
145 cli->desthost, domain, nt_errstr(ntret) ));
146 /*
147 * Note: here, we have:
148 * (pipe_hnd != NULL) if and only if NT_STATUS_IS_OK(ntret)
149 */
150 }
151
152 cli_shutdown(cli);
153 return ntret;
154}
155
156/**
157 * Join a domain using the administrator username and password
158 *
159 * @param argc Standard main() style argc
160 * @param argc Standard main() style argv. Initial components are already
161 * stripped. Currently not used.
162 * @return A shell status integer (0 for success)
163 *
164 **/
165
166int net_rpc_join_newstyle(struct net_context *c, int argc, const char **argv)
167{
168
169 /* libsmb variables */
170
171 struct cli_state *cli;
172 TALLOC_CTX *mem_ctx;
173 uint32 acb_info = ACB_WSTRUST;
174 uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
175 enum netr_SchannelType sec_channel_type;
176 struct rpc_pipe_client *pipe_hnd = NULL;
177 struct dcerpc_binding_handle *b = NULL;
178
179 /* rpc variables */
180
181 struct policy_handle lsa_pol, sam_pol, domain_pol, user_pol;
182 struct dom_sid *domain_sid;
183 uint32 user_rid;
184
185 /* Password stuff */
186
187 char *clear_trust_password = NULL;
188 struct samr_CryptPassword crypt_pwd;
189 uchar md4_trust_password[16];
190 union samr_UserInfo set_info;
191
192 /* Misc */
193
194 NTSTATUS status, result;
195 int retval = 1;
196 const char *domain = NULL;
197 char *acct_name;
198 struct lsa_String lsa_acct_name;
199 uint32 acct_flags=0;
200 uint32_t access_granted = 0;
201 union lsa_PolicyInformation *info = NULL;
202 struct samr_Ids user_rids;
203 struct samr_Ids name_types;
204
205
206 /* check what type of join */
207 if (argc >= 0) {
208 sec_channel_type = get_sec_channel_type(argv[0]);
209 } else {
210 sec_channel_type = get_sec_channel_type(NULL);
211 }
212
213 switch (sec_channel_type) {
214 case SEC_CHAN_WKSTA:
215 acb_info = ACB_WSTRUST;
216 break;
217 case SEC_CHAN_BDC:
218 acb_info = ACB_SVRTRUST;
219 break;
220#if 0
221 case SEC_CHAN_DOMAIN:
222 acb_info = ACB_DOMTRUST;
223 break;
224#endif
225 default:
226 DEBUG(0,("secure channel type %d not yet supported\n",
227 sec_channel_type));
228 break;
229 }
230
231 /* Make authenticated connection to remote machine */
232
233 status = net_make_ipc_connection(c, NET_FLAGS_PDC, &cli);
234 if (!NT_STATUS_IS_OK(status)) {
235 return 1;
236 }
237
238 if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
239 DEBUG(0, ("Could not initialise talloc context\n"));
240 goto done;
241 }
242
243 /* Fetch domain sid */
244
245 status = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc.syntax_id,
246 &pipe_hnd);
247 if (!NT_STATUS_IS_OK(status)) {
248 DEBUG(0, ("Error connecting to LSA pipe. Error was %s\n",
249 nt_errstr(status) ));
250 goto done;
251 }
252
253 b = pipe_hnd->binding_handle;
254
255 CHECK_RPC_ERR(rpccli_lsa_open_policy(pipe_hnd, mem_ctx, true,
256 SEC_FLAG_MAXIMUM_ALLOWED,
257 &lsa_pol),
258 "error opening lsa policy handle");
259
260 CHECK_DCERPC_ERR(dcerpc_lsa_QueryInfoPolicy(b, mem_ctx,
261 &lsa_pol,
262 LSA_POLICY_INFO_ACCOUNT_DOMAIN,
263 &info,
264 &result),
265 "error querying info policy");
266
267 domain = info->account_domain.name.string;
268 domain_sid = info->account_domain.sid;
269
270 dcerpc_lsa_Close(b, mem_ctx, &lsa_pol, &result);
271 TALLOC_FREE(pipe_hnd); /* Done with this pipe */
272
273 /* Bail out if domain didn't get set. */
274 if (!domain) {
275 DEBUG(0, ("Could not get domain name.\n"));
276 goto done;
277 }
278
279 /* Create domain user */
280 status = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
281 &pipe_hnd);
282 if (!NT_STATUS_IS_OK(status)) {
283 DEBUG(0, ("Error connecting to SAM pipe. Error was %s\n",
284 nt_errstr(status) ));
285 goto done;
286 }
287
288 b = pipe_hnd->binding_handle;
289
290 CHECK_DCERPC_ERR(dcerpc_samr_Connect2(b, mem_ctx,
291 pipe_hnd->desthost,
292 SAMR_ACCESS_ENUM_DOMAINS
293 | SAMR_ACCESS_LOOKUP_DOMAIN,
294 &sam_pol,
295 &result),
296 "could not connect to SAM database");
297
298
299 CHECK_DCERPC_ERR(dcerpc_samr_OpenDomain(b, mem_ctx,
300 &sam_pol,
301 SAMR_DOMAIN_ACCESS_LOOKUP_INFO_1
302 | SAMR_DOMAIN_ACCESS_CREATE_USER
303 | SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
304 domain_sid,
305 &domain_pol,
306 &result),
307 "could not open domain");
308
309 /* Create domain user */
310 if ((acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname())) == NULL) {
311 status = NT_STATUS_NO_MEMORY;
312 goto done;
313 }
314 strlower_m(acct_name);
315
316 init_lsa_String(&lsa_acct_name, acct_name);
317
318 acct_flags = SEC_GENERIC_READ | SEC_GENERIC_WRITE | SEC_GENERIC_EXECUTE |
319 SEC_STD_WRITE_DAC | SEC_STD_DELETE |
320 SAMR_USER_ACCESS_SET_PASSWORD |
321 SAMR_USER_ACCESS_GET_ATTRIBUTES |
322 SAMR_USER_ACCESS_SET_ATTRIBUTES;
323
324 DEBUG(10, ("Creating account with flags: %d\n",acct_flags));
325
326 status = dcerpc_samr_CreateUser2(b, mem_ctx,
327 &domain_pol,
328 &lsa_acct_name,
329 acb_info,
330 acct_flags,
331 &user_pol,
332 &access_granted,
333 &user_rid,
334 &result);
335 if (!NT_STATUS_IS_OK(status)) {
336 goto done;
337 }
338 if (!NT_STATUS_IS_OK(result) &&
339 !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
340 status = result;
341 d_fprintf(stderr,_("Creation of workstation account failed\n"));
342
343 /* If NT_STATUS_ACCESS_DENIED then we have a valid
344 username/password combo but the user does not have
345 administrator access. */
346
347 if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
348 d_fprintf(stderr, _("User specified does not have "
349 "administrator privileges\n"));
350
351 goto done;
352 }
353
354 /* We *must* do this.... don't ask... */
355
356 if (NT_STATUS_IS_OK(result)) {
357 dcerpc_samr_Close(b, mem_ctx, &user_pol, &result);
358 }
359
360 CHECK_DCERPC_ERR_DEBUG(dcerpc_samr_LookupNames(b, mem_ctx,
361 &domain_pol,
362 1,
363 &lsa_acct_name,
364 &user_rids,
365 &name_types,
366 &result),
367 ("error looking up rid for user %s: %s/%s\n",
368 acct_name, nt_errstr(status), nt_errstr(result)));
369
370 if (user_rids.count != 1) {
371 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
372 goto done;
373 }
374 if (name_types.count != 1) {
375 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
376 goto done;
377 }
378
379 if (name_types.ids[0] != SID_NAME_USER) {
380 DEBUG(0, ("%s is not a user account (type=%d)\n", acct_name, name_types.ids[0]));
381 goto done;
382 }
383
384 user_rid = user_rids.ids[0];
385
386 /* Open handle on user */
387
388 CHECK_DCERPC_ERR_DEBUG(
389 dcerpc_samr_OpenUser(b, mem_ctx,
390 &domain_pol,
391 SEC_FLAG_MAXIMUM_ALLOWED,
392 user_rid,
393 &user_pol,
394 &result),
395 ("could not re-open existing user %s: %s/%s\n",
396 acct_name, nt_errstr(status), nt_errstr(result)));
397
398 /* Create a random machine account password */
399
400 clear_trust_password = generate_random_str(talloc_tos(), DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
401 E_md4hash(clear_trust_password, md4_trust_password);
402
403 /* Set password on machine account */
404
405 init_samr_CryptPassword(clear_trust_password,
406 &cli->user_session_key,
407 &crypt_pwd);
408
409 set_info.info24.password = crypt_pwd;
410 set_info.info24.password_expired = PASS_DONT_CHANGE_AT_NEXT_LOGON;
411
412 CHECK_DCERPC_ERR(dcerpc_samr_SetUserInfo2(b, mem_ctx,
413 &user_pol,
414 24,
415 &set_info,
416 &result),
417 "error setting trust account password");
418
419 /* Why do we have to try to (re-)set the ACB to be the same as what
420 we passed in the samr_create_dom_user() call? When a NT
421 workstation is joined to a domain by an administrator the
422 acb_info is set to 0x80. For a normal user with "Add
423 workstations to the domain" rights the acb_info is 0x84. I'm
424 not sure whether it is supposed to make a difference or not. NT
425 seems to cope with either value so don't bomb out if the set
426 userinfo2 level 0x10 fails. -tpot */
427
428 set_info.info16.acct_flags = acb_info;
429
430 /* Ignoring the return value is necessary for joining a domain
431 as a normal user with "Add workstation to domain" privilege. */
432
433 status = dcerpc_samr_SetUserInfo(b, mem_ctx,
434 &user_pol,
435 16,
436 &set_info,
437 &result);
438
439 dcerpc_samr_Close(b, mem_ctx, &user_pol, &result);
440 TALLOC_FREE(pipe_hnd); /* Done with this pipe */
441
442 /* Now check the whole process from top-to-bottom */
443
444 status = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
445 &pipe_hnd);
446 if (!NT_STATUS_IS_OK(status)) {
447 DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n",
448 nt_errstr(status) ));
449 goto done;
450 }
451
452 status = rpccli_netlogon_setup_creds(pipe_hnd,
453 cli->desthost, /* server name */
454 domain, /* domain */
455 global_myname(), /* client name */
456 global_myname(), /* machine account name */
457 md4_trust_password,
458 sec_channel_type,
459 &neg_flags);
460
461 if (!NT_STATUS_IS_OK(status)) {
462 DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n",
463 nt_errstr(status)));
464
465 if ( NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
466 (sec_channel_type == SEC_CHAN_BDC) ) {
467 d_fprintf(stderr, _("Please make sure that no computer "
468 "account\nnamed like this machine "
469 "(%s) exists in the domain\n"),
470 global_myname());
471 }
472
473 goto done;
474 }
475
476 /* We can only check the schannel connection if the client is allowed
477 to do this and the server supports it. If not, just assume success
478 (after all the rpccli_netlogon_setup_creds() succeeded, and we'll
479 do the same again (setup creds) in net_rpc_join_ok(). JRA. */
480
481 if (lp_client_schannel() && (neg_flags & NETLOGON_NEG_SCHANNEL)) {
482 struct rpc_pipe_client *netlogon_schannel_pipe;
483
484 status = cli_rpc_pipe_open_schannel_with_key(
485 cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
486 DCERPC_AUTH_LEVEL_PRIVACY, domain, &pipe_hnd->dc,
487 &netlogon_schannel_pipe);
488
489 if (!NT_STATUS_IS_OK(status)) {
490 DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n",
491 nt_errstr(status)));
492
493 if ( NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
494 (sec_channel_type == SEC_CHAN_BDC) ) {
495 d_fprintf(stderr, _("Please make sure that no "
496 "computer account\nnamed "
497 "like this machine (%s) "
498 "exists in the domain\n"),
499 global_myname());
500 }
501
502 goto done;
503 }
504 TALLOC_FREE(netlogon_schannel_pipe);
505 }
506
507 TALLOC_FREE(pipe_hnd);
508
509 /* Now store the secret in the secrets database */
510
511 strupper_m(CONST_DISCARD(char *, domain));
512
513 if (!secrets_store_domain_sid(domain, domain_sid)) {
514 DEBUG(0, ("error storing domain sid for %s\n", domain));
515 goto done;
516 }
517
518 if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
519 DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
520 }
521
522 /* double-check, connection from scratch */
523 status = net_rpc_join_ok(c, domain, cli->desthost, &cli->dest_ss);
524 retval = NT_STATUS_IS_OK(status) ? 0 : -1;
525
526done:
527
528 /* Display success or failure */
529
530 if (domain) {
531 if (retval != 0) {
532 fprintf(stderr,_("Unable to join domain %s.\n"),domain);
533 } else {
534 printf(_("Joined domain %s.\n"),domain);
535 }
536 }
537
538 cli_shutdown(cli);
539
540 TALLOC_FREE(clear_trust_password);
541
542 return retval;
543}
544
545/**
546 * check that a join is OK
547 *
548 * @return A shell status integer (0 for success)
549 *
550 **/
551int net_rpc_testjoin(struct net_context *c, int argc, const char **argv)
552{
553 NTSTATUS nt_status;
554
555 if (c->display_usage) {
556 d_printf(_("Usage\n"
557 "net rpc testjoin\n"
558 " Test if a join is OK\n"));
559 return 0;
560 }
561
562 /* Display success or failure */
563 nt_status = net_rpc_join_ok(c, c->opt_target_workgroup, NULL, NULL);
564 if (!NT_STATUS_IS_OK(nt_status)) {
565 fprintf(stderr, _("Join to domain '%s' is not valid: %s\n"),
566 c->opt_target_workgroup, nt_errstr(nt_status));
567 return -1;
568 }
569
570 printf(_("Join to '%s' is OK\n"), c->opt_target_workgroup);
571 return 0;
572}
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