4659fe52ec8f606006dab89e21d3664bfabfdd1d
[samba.git] / source3 / utils / net_rpc_join.c
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 "../libcli/auth/libcli_auth.h"
24 #include "../librpc/gen_ndr/cli_lsa.h"
25 #include "rpc_client/cli_lsarpc.h"
26 #include "../librpc/gen_ndr/cli_samr.h"
27 #include "rpc_client/init_samr.h"
28 #include "../librpc/gen_ndr/ndr_netlogon.h"
29 #include "rpc_client/cli_netlogon.h"
30
31 /* Macro for checking RPC error codes to make things more readable */
32
33 #define CHECK_RPC_ERR(rpc, msg) \
34         if (!NT_STATUS_IS_OK(result = rpc)) { \
35                 DEBUG(0, (msg ": %s\n", nt_errstr(result))); \
36                 goto done; \
37         }
38
39 #define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
40         if (!NT_STATUS_IS_OK(result = rpc)) { \
41                 DEBUG(0, debug_args); \
42                 goto done; \
43         }
44
45 /**
46  * confirm that a domain join is still valid
47  *
48  * @return A shell status integer (0 for success)
49  *
50  **/
51 NTSTATUS net_rpc_join_ok(struct net_context *c, const char *domain,
52                          const char *server, struct sockaddr_storage *pss)
53 {
54         enum security_types sec;
55         unsigned int conn_flags = NET_FLAGS_PDC;
56         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
57         struct cli_state *cli = NULL;
58         struct rpc_pipe_client *pipe_hnd = NULL;
59         struct rpc_pipe_client *netlogon_pipe = NULL;
60         NTSTATUS ntret = NT_STATUS_UNSUCCESSFUL;
61
62         sec = (enum security_types)lp_security();
63
64         if (sec == SEC_ADS) {
65                 /* Connect to IPC$ using machine account's credentials. We don't use anonymous
66                    connection here, as it may be denied by server's local policy. */
67                 net_use_machine_account(c);
68
69         } else {
70                 /* some servers (e.g. WinNT) don't accept machine-authenticated
71                    smb connections */
72                 conn_flags |= NET_FLAGS_ANONYMOUS;
73         }
74
75         /* Connect to remote machine */
76         ntret = net_make_ipc_connection_ex(c, domain, server, pss, conn_flags,
77                                            &cli);
78         if (!NT_STATUS_IS_OK(ntret)) {
79                 return ntret;
80         }
81
82         /* Setup the creds as though we're going to do schannel... */
83         ntret = get_schannel_session_key(cli, domain, &neg_flags,
84                                          &netlogon_pipe);
85
86         /* We return NT_STATUS_INVALID_NETWORK_RESPONSE if the server is refusing
87            to negotiate schannel, but the creds were set up ok. That'll have to do. */
88
89         if (!NT_STATUS_IS_OK(ntret)) {
90                 if (NT_STATUS_EQUAL(ntret, NT_STATUS_INVALID_NETWORK_RESPONSE)) {
91                         cli_shutdown(cli);
92                         return NT_STATUS_OK;
93                 } else {
94                         DEBUG(0,("net_rpc_join_ok: failed to get schannel session "
95                                         "key from server %s for domain %s. Error was %s\n",
96                                 cli->desthost, domain, nt_errstr(ntret) ));
97                         cli_shutdown(cli);
98                         return ntret;
99                 }
100         }
101
102         /* Only do the rest of the schannel test if the client is allowed to do this. */
103         if (!lp_client_schannel()) {
104                 cli_shutdown(cli);
105                 /* We're good... */
106                 return ntret;
107         }
108
109         ntret = cli_rpc_pipe_open_schannel_with_key(
110                 cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
111                 DCERPC_AUTH_LEVEL_PRIVACY,
112                 domain, &netlogon_pipe->dc, &pipe_hnd);
113
114         if (!NT_STATUS_IS_OK(ntret)) {
115                 DEBUG(0,("net_rpc_join_ok: failed to open schannel session "
116                                 "on netlogon pipe to server %s for domain %s. Error was %s\n",
117                         cli->desthost, domain, nt_errstr(ntret) ));
118                 /*
119                  * Note: here, we have:
120                  * (pipe_hnd != NULL) if and only if NT_STATUS_IS_OK(ntret)
121                  */
122         }
123
124         cli_shutdown(cli);
125         return ntret;
126 }
127
128 /**
129  * Join a domain using the administrator username and password
130  *
131  * @param argc  Standard main() style argc
132  * @param argc  Standard main() style argv.  Initial components are already
133  *              stripped.  Currently not used.
134  * @return A shell status integer (0 for success)
135  *
136  **/
137
138 int net_rpc_join_newstyle(struct net_context *c, int argc, const char **argv)
139 {
140
141         /* libsmb variables */
142
143         struct cli_state *cli;
144         TALLOC_CTX *mem_ctx;
145         uint32 acb_info = ACB_WSTRUST;
146         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
147         enum netr_SchannelType sec_channel_type;
148         struct rpc_pipe_client *pipe_hnd = NULL;
149
150         /* rpc variables */
151
152         struct policy_handle lsa_pol, sam_pol, domain_pol, user_pol;
153         struct dom_sid *domain_sid;
154         uint32 user_rid;
155
156         /* Password stuff */
157
158         char *clear_trust_password = NULL;
159         struct samr_CryptPassword crypt_pwd;
160         uchar md4_trust_password[16];
161         union samr_UserInfo set_info;
162
163         /* Misc */
164
165         NTSTATUS result;
166         int retval = 1;
167         const char *domain = NULL;
168         char *acct_name;
169         struct lsa_String lsa_acct_name;
170         uint32 acct_flags=0;
171         uint32_t access_granted = 0;
172         union lsa_PolicyInformation *info = NULL;
173         struct samr_Ids user_rids;
174         struct samr_Ids name_types;
175
176         /* check what type of join */
177         if (argc >= 0) {
178                 sec_channel_type = get_sec_channel_type(argv[0]);
179         } else {
180                 sec_channel_type = get_sec_channel_type(NULL);
181         }
182
183         switch (sec_channel_type) {
184         case SEC_CHAN_WKSTA:
185                 acb_info = ACB_WSTRUST;
186                 break;
187         case SEC_CHAN_BDC:
188                 acb_info = ACB_SVRTRUST;
189                 break;
190 #if 0
191         case SEC_CHAN_DOMAIN:
192                 acb_info = ACB_DOMTRUST;
193                 break;
194 #endif
195         default:
196                 DEBUG(0,("secure channel type %d not yet supported\n",
197                         sec_channel_type));
198                 break;
199         }
200
201         /* Make authenticated connection to remote machine */
202
203         result = net_make_ipc_connection(c, NET_FLAGS_PDC, &cli);
204         if (!NT_STATUS_IS_OK(result)) {
205                 return 1;
206         }
207
208         if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
209                 DEBUG(0, ("Could not initialise talloc context\n"));
210                 goto done;
211         }
212
213         /* Fetch domain sid */
214
215         result = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc.syntax_id,
216                                           &pipe_hnd);
217         if (!NT_STATUS_IS_OK(result)) {
218                 DEBUG(0, ("Error connecting to LSA pipe. Error was %s\n",
219                         nt_errstr(result) ));
220                 goto done;
221         }
222
223
224         CHECK_RPC_ERR(rpccli_lsa_open_policy(pipe_hnd, mem_ctx, true,
225                                           SEC_FLAG_MAXIMUM_ALLOWED,
226                                           &lsa_pol),
227                       "error opening lsa policy handle");
228
229         CHECK_RPC_ERR(rpccli_lsa_QueryInfoPolicy(pipe_hnd, mem_ctx,
230                                                  &lsa_pol,
231                                                  LSA_POLICY_INFO_ACCOUNT_DOMAIN,
232                                                  &info),
233                       "error querying info policy");
234
235         domain = info->account_domain.name.string;
236         domain_sid = info->account_domain.sid;
237
238         rpccli_lsa_Close(pipe_hnd, mem_ctx, &lsa_pol);
239         TALLOC_FREE(pipe_hnd); /* Done with this pipe */
240
241         /* Bail out if domain didn't get set. */
242         if (!domain) {
243                 DEBUG(0, ("Could not get domain name.\n"));
244                 goto done;
245         }
246
247         /* Create domain user */
248         result = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
249                                           &pipe_hnd);
250         if (!NT_STATUS_IS_OK(result)) {
251                 DEBUG(0, ("Error connecting to SAM pipe. Error was %s\n",
252                         nt_errstr(result) ));
253                 goto done;
254         }
255
256         CHECK_RPC_ERR(rpccli_samr_Connect2(pipe_hnd, mem_ctx,
257                                            pipe_hnd->desthost,
258                                            SAMR_ACCESS_ENUM_DOMAINS
259                                            | SAMR_ACCESS_LOOKUP_DOMAIN,
260                                            &sam_pol),
261                       "could not connect to SAM database");
262
263
264         CHECK_RPC_ERR(rpccli_samr_OpenDomain(pipe_hnd, mem_ctx,
265                                              &sam_pol,
266                                              SAMR_DOMAIN_ACCESS_LOOKUP_INFO_1
267                                              | SAMR_DOMAIN_ACCESS_CREATE_USER
268                                              | SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
269                                              domain_sid,
270                                              &domain_pol),
271                       "could not open domain");
272
273         /* Create domain user */
274         if ((acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname())) == NULL) {
275                 result = NT_STATUS_NO_MEMORY;
276                 goto done;
277         }
278         strlower_m(acct_name);
279
280         init_lsa_String(&lsa_acct_name, acct_name);
281
282         acct_flags = SEC_GENERIC_READ | SEC_GENERIC_WRITE | SEC_GENERIC_EXECUTE |
283                      SEC_STD_WRITE_DAC | SEC_STD_DELETE |
284                      SAMR_USER_ACCESS_SET_PASSWORD |
285                      SAMR_USER_ACCESS_GET_ATTRIBUTES |
286                      SAMR_USER_ACCESS_SET_ATTRIBUTES;
287
288         DEBUG(10, ("Creating account with flags: %d\n",acct_flags));
289
290         result = rpccli_samr_CreateUser2(pipe_hnd, mem_ctx,
291                                          &domain_pol,
292                                          &lsa_acct_name,
293                                          acb_info,
294                                          acct_flags,
295                                          &user_pol,
296                                          &access_granted,
297                                          &user_rid);
298
299         if (!NT_STATUS_IS_OK(result) &&
300             !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
301                 d_fprintf(stderr,_("Creation of workstation account failed\n"));
302
303                 /* If NT_STATUS_ACCESS_DENIED then we have a valid
304                    username/password combo but the user does not have
305                    administrator access. */
306
307                 if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
308                         d_fprintf(stderr, _("User specified does not have "
309                                             "administrator privileges\n"));
310
311                 goto done;
312         }
313
314         /* We *must* do this.... don't ask... */
315
316         if (NT_STATUS_IS_OK(result)) {
317                 rpccli_samr_Close(pipe_hnd, mem_ctx, &user_pol);
318         }
319
320         CHECK_RPC_ERR_DEBUG(rpccli_samr_LookupNames(pipe_hnd, mem_ctx,
321                                                     &domain_pol,
322                                                     1,
323                                                     &lsa_acct_name,
324                                                     &user_rids,
325                                                     &name_types),
326                             ("error looking up rid for user %s: %s\n",
327                              acct_name, nt_errstr(result)));
328
329         if (name_types.ids[0] != SID_NAME_USER) {
330                 DEBUG(0, ("%s is not a user account (type=%d)\n", acct_name, name_types.ids[0]));
331                 goto done;
332         }
333
334         user_rid = user_rids.ids[0];
335
336         /* Open handle on user */
337
338         CHECK_RPC_ERR_DEBUG(
339                 rpccli_samr_OpenUser(pipe_hnd, mem_ctx,
340                                      &domain_pol,
341                                      SEC_FLAG_MAXIMUM_ALLOWED,
342                                      user_rid,
343                                      &user_pol),
344                 ("could not re-open existing user %s: %s\n",
345                  acct_name, nt_errstr(result)));
346         
347         /* Create a random machine account password */
348
349         clear_trust_password = generate_random_str(talloc_tos(), DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
350         E_md4hash(clear_trust_password, md4_trust_password);
351
352         /* Set password on machine account */
353
354         init_samr_CryptPassword(clear_trust_password,
355                                 &cli->user_session_key,
356                                 &crypt_pwd);
357
358         set_info.info24.password = crypt_pwd;
359         set_info.info24.password_expired = PASS_DONT_CHANGE_AT_NEXT_LOGON;
360
361         CHECK_RPC_ERR(rpccli_samr_SetUserInfo2(pipe_hnd, mem_ctx,
362                                                &user_pol,
363                                                24,
364                                                &set_info),
365                       "error setting trust account password");
366
367         /* Why do we have to try to (re-)set the ACB to be the same as what
368            we passed in the samr_create_dom_user() call?  When a NT
369            workstation is joined to a domain by an administrator the
370            acb_info is set to 0x80.  For a normal user with "Add
371            workstations to the domain" rights the acb_info is 0x84.  I'm
372            not sure whether it is supposed to make a difference or not.  NT
373            seems to cope with either value so don't bomb out if the set
374            userinfo2 level 0x10 fails.  -tpot */
375
376         set_info.info16.acct_flags = acb_info;
377
378         /* Ignoring the return value is necessary for joining a domain
379            as a normal user with "Add workstation to domain" privilege. */
380
381         result = rpccli_samr_SetUserInfo(pipe_hnd, mem_ctx,
382                                          &user_pol,
383                                          16,
384                                          &set_info);
385
386         rpccli_samr_Close(pipe_hnd, mem_ctx, &user_pol);
387         TALLOC_FREE(pipe_hnd); /* Done with this pipe */
388
389         /* Now check the whole process from top-to-bottom */
390
391         result = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
392                                           &pipe_hnd);
393         if (!NT_STATUS_IS_OK(result)) {
394                 DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n",
395                         nt_errstr(result) ));
396                 goto done;
397         }
398
399         result = rpccli_netlogon_setup_creds(pipe_hnd,
400                                         cli->desthost, /* server name */
401                                         domain,        /* domain */
402                                         global_myname(), /* client name */
403                                         global_myname(), /* machine account name */
404                                         md4_trust_password,
405                                         sec_channel_type,
406                                         &neg_flags);
407
408         if (!NT_STATUS_IS_OK(result)) {
409                 DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n",
410                           nt_errstr(result)));
411
412                 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
413                      (sec_channel_type == SEC_CHAN_BDC) ) {
414                         d_fprintf(stderr, _("Please make sure that no computer "
415                                             "account\nnamed like this machine "
416                                             "(%s) exists in the domain\n"),
417                                  global_myname());
418                 }
419
420                 goto done;
421         }
422
423         /* We can only check the schannel connection if the client is allowed
424            to do this and the server supports it. If not, just assume success
425            (after all the rpccli_netlogon_setup_creds() succeeded, and we'll
426            do the same again (setup creds) in net_rpc_join_ok(). JRA. */
427
428         if (lp_client_schannel() && (neg_flags & NETLOGON_NEG_SCHANNEL)) {
429                 struct rpc_pipe_client *netlogon_schannel_pipe;
430
431                 result = cli_rpc_pipe_open_schannel_with_key(
432                         cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
433                         DCERPC_AUTH_LEVEL_PRIVACY, domain, &pipe_hnd->dc,
434                         &netlogon_schannel_pipe);
435
436                 if (!NT_STATUS_IS_OK(result)) {
437                         DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n",
438                                   nt_errstr(result)));
439
440                         if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
441                              (sec_channel_type == SEC_CHAN_BDC) ) {
442                                 d_fprintf(stderr, _("Please make sure that no "
443                                                     "computer account\nnamed "
444                                                     "like this machine (%s) "
445                                                     "exists in the domain\n"),
446                                          global_myname());
447                         }
448
449                         goto done;
450                 }
451                 TALLOC_FREE(netlogon_schannel_pipe);
452         }
453
454         TALLOC_FREE(pipe_hnd);
455
456         /* Now store the secret in the secrets database */
457
458         strupper_m(CONST_DISCARD(char *, domain));
459
460         if (!secrets_store_domain_sid(domain, domain_sid)) {
461                 DEBUG(0, ("error storing domain sid for %s\n", domain));
462                 goto done;
463         }
464
465         if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
466                 DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
467         }
468
469         /* double-check, connection from scratch */
470         result = net_rpc_join_ok(c, domain, cli->desthost, &cli->dest_ss);
471         retval = NT_STATUS_IS_OK(result) ? 0 : -1;
472
473 done:
474
475         /* Display success or failure */
476
477         if (domain) {
478                 if (retval != 0) {
479                         fprintf(stderr,_("Unable to join domain %s.\n"),domain);
480                 } else {
481                         printf(_("Joined domain %s.\n"),domain);
482                 }
483         }
484
485         cli_shutdown(cli);
486
487         TALLOC_FREE(clear_trust_password);
488
489         return retval;
490 }
491
492 /**
493  * check that a join is OK
494  *
495  * @return A shell status integer (0 for success)
496  *
497  **/
498 int net_rpc_testjoin(struct net_context *c, int argc, const char **argv)
499 {
500         NTSTATUS nt_status;
501
502         if (c->display_usage) {
503                 d_printf(_("Usage\n"
504                            "net rpc testjoin\n"
505                            "    Test if a join is OK\n"));
506                 return 0;
507         }
508
509         /* Display success or failure */
510         nt_status = net_rpc_join_ok(c, c->opt_target_workgroup, NULL, NULL);
511         if (!NT_STATUS_IS_OK(nt_status)) {
512                 fprintf(stderr, _("Join to domain '%s' is not valid: %s\n"),
513                         c->opt_target_workgroup, nt_errstr(nt_status));
514                 return -1;
515         }
516
517         printf(_("Join to '%s' is OK\n"), c->opt_target_workgroup);
518         return 0;
519 }