source: branches/samba-3.3.x/source/utils/net_rpc_join.c

Last change on this file was 342, checked in by Herwig Bauernfeind, 16 years ago

Update 3.3 to 3.3.9
File size: 14.6 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
24/* Macro for checking RPC error codes to make things more readable */
25
26#define CHECK_RPC_ERR(rpc, msg) \
27 if (!NT_STATUS_IS_OK(result = rpc)) { \
28 DEBUG(0, (msg ": %s\n", nt_errstr(result))); \
29 goto done; \
30 }
31
32#define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
33 if (!NT_STATUS_IS_OK(result = rpc)) { \
34 DEBUG(0, debug_args); \
35 goto done; \
36 }
37
38/**
39 * confirm that a domain join is still valid
40 *
41 * @return A shell status integer (0 for success)
42 *
43 **/
44NTSTATUS net_rpc_join_ok(struct net_context *c, const char *domain,
45 const char *server, struct sockaddr_storage *pss)
46{
47 enum security_types sec;
48 unsigned int conn_flags = NET_FLAGS_PDC;
49 uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
50 struct cli_state *cli = NULL;
51 struct rpc_pipe_client *pipe_hnd = NULL;
52 struct rpc_pipe_client *netlogon_pipe = NULL;
53 NTSTATUS ntret = NT_STATUS_UNSUCCESSFUL;
54
55 sec = (enum security_types)lp_security();
56
57 if (sec == SEC_ADS) {
58 /* Connect to IPC$ using machine account's credentials. We don't use anonymous
59 connection here, as it may be denied by server's local policy. */
60 net_use_machine_account(c);
61
62 } else {
63 /* some servers (e.g. WinNT) don't accept machine-authenticated
64 smb connections */
65 conn_flags |= NET_FLAGS_ANONYMOUS;
66 }
67
68 /* Connect to remote machine */
69 ntret = net_make_ipc_connection_ex(c, domain, server, pss, conn_flags,
70 &cli);
71 if (!NT_STATUS_IS_OK(ntret)) {
72 return ntret;
73 }
74
75 /* Setup the creds as though we're going to do schannel... */
76 ntret = get_schannel_session_key(cli, domain, &neg_flags,
77 &netlogon_pipe);
78
79 /* We return NT_STATUS_INVALID_NETWORK_RESPONSE if the server is refusing
80 to negotiate schannel, but the creds were set up ok. That'll have to do. */
81
82 if (!NT_STATUS_IS_OK(ntret)) {
83 if (NT_STATUS_EQUAL(ntret, NT_STATUS_INVALID_NETWORK_RESPONSE)) {
84 cli_shutdown(cli);
85 return NT_STATUS_OK;
86 } else {
87 DEBUG(0,("net_rpc_join_ok: failed to get schannel session "
88 "key from server %s for domain %s. Error was %s\n",
89 cli->desthost, domain, nt_errstr(ntret) ));
90 cli_shutdown(cli);
91 return ntret;
92 }
93 }
94
95 /* Only do the rest of the schannel test if the client is allowed to do this. */
96 if (!lp_client_schannel()) {
97 cli_shutdown(cli);
98 /* We're good... */
99 return ntret;
100 }
101
102 ntret = cli_rpc_pipe_open_schannel_with_key(
103 cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
104 PIPE_AUTH_LEVEL_PRIVACY,
105 domain, netlogon_pipe->dc, &pipe_hnd);
106
107 if (!NT_STATUS_IS_OK(ntret)) {
108 DEBUG(0,("net_rpc_join_ok: failed to open schannel session "
109 "on netlogon pipe to server %s for domain %s. Error was %s\n",
110 cli->desthost, domain, nt_errstr(ntret) ));
111 /*
112 * Note: here, we have:
113 * (pipe_hnd != NULL) if and only if NT_STATUS_IS_OK(ntret)
114 */
115 }
116
117 cli_shutdown(cli);
118 return ntret;
119}
120
121/**
122 * Join a domain using the administrator username and password
123 *
124 * @param argc Standard main() style argc
125 * @param argc Standard main() style argv. Initial components are already
126 * stripped. Currently not used.
127 * @return A shell status integer (0 for success)
128 *
129 **/
130
131int net_rpc_join_newstyle(struct net_context *c, int argc, const char **argv)
132{
133
134 /* libsmb variables */
135
136 struct cli_state *cli;
137 TALLOC_CTX *mem_ctx;
138 uint32 acb_info = ACB_WSTRUST;
139 uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
140 uint32 sec_channel_type;
141 struct rpc_pipe_client *pipe_hnd = NULL;
142
143 /* rpc variables */
144
145 POLICY_HND lsa_pol, sam_pol, domain_pol, user_pol;
146 DOM_SID *domain_sid;
147 uint32 user_rid;
148
149 /* Password stuff */
150
151 char *clear_trust_password = NULL;
152 struct samr_CryptPassword crypt_pwd;
153 uchar md4_trust_password[16];
154 union samr_UserInfo set_info;
155
156 /* Misc */
157
158 NTSTATUS result;
159 int retval = 1;
160 const char *domain = NULL;
161 char *acct_name;
162 struct lsa_String lsa_acct_name;
163 uint32 acct_flags=0;
164 uint32_t access_granted = 0;
165 union lsa_PolicyInformation *info = NULL;
166 struct samr_Ids user_rids;
167 struct samr_Ids name_types;
168
169 /* check what type of join */
170 if (argc >= 0) {
171 sec_channel_type = get_sec_channel_type(argv[0]);
172 } else {
173 sec_channel_type = get_sec_channel_type(NULL);
174 }
175
176 switch (sec_channel_type) {
177 case SEC_CHAN_WKSTA:
178 acb_info = ACB_WSTRUST;
179 break;
180 case SEC_CHAN_BDC:
181 acb_info = ACB_SVRTRUST;
182 break;
183#if 0
184 case SEC_CHAN_DOMAIN:
185 acb_info = ACB_DOMTRUST;
186 break;
187#endif
188 }
189
190 /* Make authenticated connection to remote machine */
191
192 result = net_make_ipc_connection(c, NET_FLAGS_PDC, &cli);
193 if (!NT_STATUS_IS_OK(result)) {
194 return 1;
195 }
196
197 if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
198 DEBUG(0, ("Could not initialise talloc context\n"));
199 goto done;
200 }
201
202 /* Fetch domain sid */
203
204 result = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc.syntax_id,
205 &pipe_hnd);
206 if (!NT_STATUS_IS_OK(result)) {
207 DEBUG(0, ("Error connecting to LSA pipe. Error was %s\n",
208 nt_errstr(result) ));
209 goto done;
210 }
211
212
213 CHECK_RPC_ERR(rpccli_lsa_open_policy(pipe_hnd, mem_ctx, true,
214 SEC_RIGHTS_MAXIMUM_ALLOWED,
215 &lsa_pol),
216 "error opening lsa policy handle");
217
218 CHECK_RPC_ERR(rpccli_lsa_QueryInfoPolicy(pipe_hnd, mem_ctx,
219 &lsa_pol,
220 LSA_POLICY_INFO_ACCOUNT_DOMAIN,
221 &info),
222 "error querying info policy");
223
224 domain = info->account_domain.name.string;
225 domain_sid = info->account_domain.sid;
226
227 rpccli_lsa_Close(pipe_hnd, mem_ctx, &lsa_pol);
228 TALLOC_FREE(pipe_hnd); /* Done with this pipe */
229
230 /* Bail out if domain didn't get set. */
231 if (!domain) {
232 DEBUG(0, ("Could not get domain name.\n"));
233 goto done;
234 }
235
236 /* Create domain user */
237 result = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
238 &pipe_hnd);
239 if (!NT_STATUS_IS_OK(result)) {
240 DEBUG(0, ("Error connecting to SAM pipe. Error was %s\n",
241 nt_errstr(result) ));
242 goto done;
243 }
244
245 CHECK_RPC_ERR(rpccli_samr_Connect2(pipe_hnd, mem_ctx,
246 pipe_hnd->desthost,
247 SAMR_ACCESS_ENUM_DOMAINS
248 | SAMR_ACCESS_LOOKUP_DOMAIN,
249 &sam_pol),
250 "could not connect to SAM database");
251
252
253 CHECK_RPC_ERR(rpccli_samr_OpenDomain(pipe_hnd, mem_ctx,
254 &sam_pol,
255 SAMR_DOMAIN_ACCESS_LOOKUP_INFO_1
256 | SAMR_DOMAIN_ACCESS_CREATE_USER
257 | SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
258 domain_sid,
259 &domain_pol),
260 "could not open domain");
261
262 /* Create domain user */
263 if ((acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname())) == NULL) {
264 result = NT_STATUS_NO_MEMORY;
265 goto done;
266 }
267 strlower_m(acct_name);
268
269 init_lsa_String(&lsa_acct_name, acct_name);
270
271 acct_flags = SEC_GENERIC_READ | SEC_GENERIC_WRITE | SEC_GENERIC_EXECUTE |
272 SEC_STD_WRITE_DAC | SEC_STD_DELETE |
273 SAMR_USER_ACCESS_SET_PASSWORD |
274 SAMR_USER_ACCESS_GET_ATTRIBUTES |
275 SAMR_USER_ACCESS_SET_ATTRIBUTES;
276
277 DEBUG(10, ("Creating account with flags: %d\n",acct_flags));
278
279 result = rpccli_samr_CreateUser2(pipe_hnd, mem_ctx,
280 &domain_pol,
281 &lsa_acct_name,
282 acb_info,
283 acct_flags,
284 &user_pol,
285 &access_granted,
286 &user_rid);
287
288 if (!NT_STATUS_IS_OK(result) &&
289 !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
290 d_fprintf(stderr, "Creation of workstation account failed\n");
291
292 /* If NT_STATUS_ACCESS_DENIED then we have a valid
293 username/password combo but the user does not have
294 administrator access. */
295
296 if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
297 d_fprintf(stderr, "User specified does not have administrator privileges\n");
298
299 goto done;
300 }
301
302 /* We *must* do this.... don't ask... */
303
304 if (NT_STATUS_IS_OK(result)) {
305 rpccli_samr_Close(pipe_hnd, mem_ctx, &user_pol);
306 }
307
308 CHECK_RPC_ERR_DEBUG(rpccli_samr_LookupNames(pipe_hnd, mem_ctx,
309 &domain_pol,
310 1,
311 &lsa_acct_name,
312 &user_rids,
313 &name_types),
314 ("error looking up rid for user %s: %s\n",
315 acct_name, nt_errstr(result)));
316
317 if (name_types.ids[0] != SID_NAME_USER) {
318 DEBUG(0, ("%s is not a user account (type=%d)\n", acct_name, name_types.ids[0]));
319 goto done;
320 }
321
322 user_rid = user_rids.ids[0];
323
324 /* Open handle on user */
325
326 CHECK_RPC_ERR_DEBUG(
327 rpccli_samr_OpenUser(pipe_hnd, mem_ctx,
328 &domain_pol,
329 SEC_RIGHTS_MAXIMUM_ALLOWED,
330 user_rid,
331 &user_pol),
332 ("could not re-open existing user %s: %s\n",
333 acct_name, nt_errstr(result)));
334
335 /* Create a random machine account password */
336
337 {
338 char *str;
339 str = generate_random_str(DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
340 clear_trust_password = SMB_STRDUP(str);
341 E_md4hash(clear_trust_password, md4_trust_password);
342 }
343
344 /* Set password on machine account */
345
346 init_samr_CryptPassword(clear_trust_password,
347 &cli->user_session_key,
348 &crypt_pwd);
349
350 init_samr_user_info24(&set_info.info24, &crypt_pwd,
351 PASS_DONT_CHANGE_AT_NEXT_LOGON);
352
353 CHECK_RPC_ERR(rpccli_samr_SetUserInfo2(pipe_hnd, mem_ctx,
354 &user_pol,
355 24,
356 &set_info),
357 "error setting trust account password");
358
359 /* Why do we have to try to (re-)set the ACB to be the same as what
360 we passed in the samr_create_dom_user() call? When a NT
361 workstation is joined to a domain by an administrator the
362 acb_info is set to 0x80. For a normal user with "Add
363 workstations to the domain" rights the acb_info is 0x84. I'm
364 not sure whether it is supposed to make a difference or not. NT
365 seems to cope with either value so don't bomb out if the set
366 userinfo2 level 0x10 fails. -tpot */
367
368 set_info.info16.acct_flags = acb_info;
369
370 /* Ignoring the return value is necessary for joining a domain
371 as a normal user with "Add workstation to domain" privilege. */
372
373 result = rpccli_samr_SetUserInfo(pipe_hnd, mem_ctx,
374 &user_pol,
375 16,
376 &set_info);
377
378 rpccli_samr_Close(pipe_hnd, mem_ctx, &user_pol);
379 TALLOC_FREE(pipe_hnd); /* Done with this pipe */
380
381 /* Now check the whole process from top-to-bottom */
382
383 result = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
384 &pipe_hnd);
385 if (!NT_STATUS_IS_OK(result)) {
386 DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n",
387 nt_errstr(result) ));
388 goto done;
389 }
390
391 result = rpccli_netlogon_setup_creds(pipe_hnd,
392 cli->desthost, /* server name */
393 domain, /* domain */
394 global_myname(), /* client name */
395 global_myname(), /* machine account name */
396 md4_trust_password,
397 sec_channel_type,
398 &neg_flags);
399
400 if (!NT_STATUS_IS_OK(result)) {
401 DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n",
402 nt_errstr(result)));
403
404 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
405 (sec_channel_type == SEC_CHAN_BDC) ) {
406 d_fprintf(stderr, "Please make sure that no computer account\n"
407 "named like this machine (%s) exists in the domain\n",
408 global_myname());
409 }
410
411 goto done;
412 }
413
414 /* We can only check the schannel connection if the client is allowed
415 to do this and the server supports it. If not, just assume success
416 (after all the rpccli_netlogon_setup_creds() succeeded, and we'll
417 do the same again (setup creds) in net_rpc_join_ok(). JRA. */
418
419 if (lp_client_schannel() && (neg_flags & NETLOGON_NEG_SCHANNEL)) {
420 struct rpc_pipe_client *netlogon_schannel_pipe;
421
422 result = cli_rpc_pipe_open_schannel_with_key(
423 cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
424 PIPE_AUTH_LEVEL_PRIVACY, domain, pipe_hnd->dc,
425 &netlogon_schannel_pipe);
426
427 if (!NT_STATUS_IS_OK(result)) {
428 DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n",
429 nt_errstr(result)));
430
431 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
432 (sec_channel_type == SEC_CHAN_BDC) ) {
433 d_fprintf(stderr, "Please make sure that no computer account\n"
434 "named like this machine (%s) exists in the domain\n",
435 global_myname());
436 }
437
438 goto done;
439 }
440 TALLOC_FREE(netlogon_schannel_pipe);
441 }
442
443 TALLOC_FREE(pipe_hnd);
444
445 /* Now store the secret in the secrets database */
446
447 strupper_m(CONST_DISCARD(char *, domain));
448
449 if (!secrets_store_domain_sid(domain, domain_sid)) {
450 DEBUG(0, ("error storing domain sid for %s\n", domain));
451 goto done;
452 }
453
454 if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
455 DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
456 }
457
458 /* double-check, connection from scratch */
459 result = net_rpc_join_ok(c, domain, cli->desthost, &cli->dest_ss);
460 retval = NT_STATUS_IS_OK(result) ? 0 : -1;
461
462done:
463
464 /* Display success or failure */
465
466 if (domain) {
467 if (retval != 0) {
468 fprintf(stderr,"Unable to join domain %s.\n",domain);
469 } else {
470 printf("Joined domain %s.\n",domain);
471 }
472 }
473
474 cli_shutdown(cli);
475
476 SAFE_FREE(clear_trust_password);
477
478 return retval;
479}
480
481/**
482 * check that a join is OK
483 *
484 * @return A shell status integer (0 for success)
485 *
486 **/
487int net_rpc_testjoin(struct net_context *c, int argc, const char **argv)
488{
489 NTSTATUS nt_status;
490
491 if (c->display_usage) {
492 d_printf("Usage\n"
493 "net rpc testjoin\n"
494 " Test if a join is OK\n");
495 return 0;
496 }
497
498 /* Display success or failure */
499 nt_status = net_rpc_join_ok(c, c->opt_target_workgroup, NULL, NULL);
500 if (!NT_STATUS_IS_OK(nt_status)) {
501 fprintf(stderr,"Join to domain '%s' is not valid: %s\n",
502 c->opt_target_workgroup, nt_errstr(nt_status));
503 return -1;
504 }
505
506 printf("Join to '%s' is OK\n", c->opt_target_workgroup);
507 return 0;
508}
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