s3:libsmb: get rid of cli_state_remote_name
[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 "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 #include "../libcli/smb/smbXcli_base.h"
35
36 /* Macro for checking RPC error codes to make things more readable */
37
38 #define CHECK_RPC_ERR(rpc, msg) \
39         if (!NT_STATUS_IS_OK(status = rpc)) { \
40                 DEBUG(0, (msg ": %s\n", nt_errstr(status))); \
41                 goto done; \
42         }
43
44 #define CHECK_DCERPC_ERR(rpc, msg) \
45         if (!NT_STATUS_IS_OK(status = rpc)) { \
46                 DEBUG(0, (msg ": %s\n", nt_errstr(status))); \
47                 goto done; \
48         } \
49         if (!NT_STATUS_IS_OK(result)) { \
50                 status = result; \
51                 DEBUG(0, (msg ": %s\n", nt_errstr(result))); \
52                 goto done; \
53         }
54
55
56 #define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
57         if (!NT_STATUS_IS_OK(status = rpc)) { \
58                 DEBUG(0, debug_args); \
59                 goto done; \
60         }
61
62 #define CHECK_DCERPC_ERR_DEBUG(rpc, debug_args) \
63         if (!NT_STATUS_IS_OK(status = rpc)) { \
64                 DEBUG(0, debug_args); \
65                 goto done; \
66         } \
67         if (!NT_STATUS_IS_OK(result)) { \
68                 status = result; \
69                 DEBUG(0, debug_args); \
70                 goto done; \
71         }
72
73
74 /**
75  * confirm that a domain join is still valid
76  *
77  * @return A shell status integer (0 for success)
78  *
79  **/
80 NTSTATUS net_rpc_join_ok(struct net_context *c, const char *domain,
81                          const char *server,
82                          const struct sockaddr_storage *server_ss)
83 {
84         enum security_types sec;
85         unsigned int conn_flags = NET_FLAGS_PDC;
86         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
87         struct cli_state *cli = NULL;
88         struct rpc_pipe_client *pipe_hnd = NULL;
89         struct rpc_pipe_client *netlogon_pipe = NULL;
90         NTSTATUS ntret = NT_STATUS_UNSUCCESSFUL;
91
92         sec = (enum security_types)lp_security();
93
94         if (sec == SEC_ADS) {
95                 /* Connect to IPC$ using machine account's credentials. We don't use anonymous
96                    connection here, as it may be denied by server's local policy. */
97                 net_use_machine_account(c);
98
99         } else {
100                 /* some servers (e.g. WinNT) don't accept machine-authenticated
101                    smb connections */
102                 conn_flags |= NET_FLAGS_ANONYMOUS;
103         }
104
105         /* Connect to remote machine */
106         ntret = net_make_ipc_connection_ex(c, domain, server, server_ss,
107                                            conn_flags, &cli);
108         if (!NT_STATUS_IS_OK(ntret)) {
109                 return ntret;
110         }
111
112         /* Setup the creds as though we're going to do schannel... */
113         ntret = get_schannel_session_key(cli, domain, &neg_flags,
114                                          &netlogon_pipe);
115
116         /* We return NT_STATUS_INVALID_NETWORK_RESPONSE if the server is refusing
117            to negotiate schannel, but the creds were set up ok. That'll have to do. */
118
119         if (!NT_STATUS_IS_OK(ntret)) {
120                 if (NT_STATUS_EQUAL(ntret, NT_STATUS_INVALID_NETWORK_RESPONSE)) {
121                         cli_shutdown(cli);
122                         return NT_STATUS_OK;
123                 } else {
124                         DEBUG(0,("net_rpc_join_ok: failed to get schannel session "
125                                         "key from server %s for domain %s. Error was %s\n",
126                                 smbXcli_conn_remote_name(cli->conn), domain, nt_errstr(ntret) ));
127                         cli_shutdown(cli);
128                         return ntret;
129                 }
130         }
131
132         /* Only do the rest of the schannel test if the client is allowed to do this. */
133         if (!lp_client_schannel()) {
134                 cli_shutdown(cli);
135                 /* We're good... */
136                 return ntret;
137         }
138
139         ntret = cli_rpc_pipe_open_schannel_with_key(
140                 cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
141                 DCERPC_AUTH_LEVEL_PRIVACY,
142                 domain, &netlogon_pipe->dc, &pipe_hnd);
143
144         if (!NT_STATUS_IS_OK(ntret)) {
145                 DEBUG(0,("net_rpc_join_ok: failed to open schannel session "
146                                 "on netlogon pipe to server %s for domain %s. Error was %s\n",
147                         smbXcli_conn_remote_name(cli->conn), domain, nt_errstr(ntret) ));
148                 /*
149                  * Note: here, we have:
150                  * (pipe_hnd != NULL) if and only if NT_STATUS_IS_OK(ntret)
151                  */
152         }
153
154         cli_shutdown(cli);
155         return ntret;
156 }
157
158 /**
159  * Join a domain using the administrator username and password
160  *
161  * @param argc  Standard main() style argc
162  * @param argc  Standard main() style argv.  Initial components are already
163  *              stripped.  Currently not used.
164  * @return A shell status integer (0 for success)
165  *
166  **/
167
168 int net_rpc_join_newstyle(struct net_context *c, int argc, const char **argv)
169 {
170
171         /* libsmb variables */
172
173         struct cli_state *cli;
174         TALLOC_CTX *mem_ctx;
175         uint32 acb_info = ACB_WSTRUST;
176         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
177         enum netr_SchannelType sec_channel_type;
178         struct rpc_pipe_client *pipe_hnd = NULL;
179         struct dcerpc_binding_handle *b = NULL;
180
181         /* rpc variables */
182
183         struct policy_handle lsa_pol, sam_pol, domain_pol, user_pol;
184         struct dom_sid *domain_sid;
185         uint32 user_rid;
186
187         /* Password stuff */
188
189         char *clear_trust_password = NULL;
190         struct samr_CryptPassword crypt_pwd;
191         uchar md4_trust_password[16];
192         union samr_UserInfo set_info;
193
194         /* Misc */
195
196         NTSTATUS status, result;
197         int retval = 1;
198         const char *domain = NULL;
199         char *acct_name;
200         struct lsa_String lsa_acct_name;
201         uint32 acct_flags=0;
202         uint32_t access_granted = 0;
203         union lsa_PolicyInformation *info = NULL;
204         struct samr_Ids user_rids;
205         struct samr_Ids name_types;
206
207
208         /* check what type of join */
209         if (argc >= 0) {
210                 sec_channel_type = get_sec_channel_type(argv[0]);
211         } else {
212                 sec_channel_type = get_sec_channel_type(NULL);
213         }
214
215         switch (sec_channel_type) {
216         case SEC_CHAN_WKSTA:
217                 acb_info = ACB_WSTRUST;
218                 break;
219         case SEC_CHAN_BDC:
220                 acb_info = ACB_SVRTRUST;
221                 break;
222 #if 0
223         case SEC_CHAN_DOMAIN:
224                 acb_info = ACB_DOMTRUST;
225                 break;
226 #endif
227         default:
228                 DEBUG(0,("secure channel type %d not yet supported\n",
229                         sec_channel_type));
230                 break;
231         }
232
233         /* Make authenticated connection to remote machine */
234
235         status = net_make_ipc_connection(c, NET_FLAGS_PDC, &cli);
236         if (!NT_STATUS_IS_OK(status)) {
237                 return 1;
238         }
239
240         if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
241                 DEBUG(0, ("Could not initialise talloc context\n"));
242                 goto done;
243         }
244
245         /* Fetch domain sid */
246
247         status = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc.syntax_id,
248                                           &pipe_hnd);
249         if (!NT_STATUS_IS_OK(status)) {
250                 DEBUG(0, ("Error connecting to LSA pipe. Error was %s\n",
251                         nt_errstr(status) ));
252                 goto done;
253         }
254
255         b = pipe_hnd->binding_handle;
256
257         CHECK_RPC_ERR(rpccli_lsa_open_policy(pipe_hnd, mem_ctx, true,
258                                           SEC_FLAG_MAXIMUM_ALLOWED,
259                                           &lsa_pol),
260                       "error opening lsa policy handle");
261
262         CHECK_DCERPC_ERR(dcerpc_lsa_QueryInfoPolicy(b, mem_ctx,
263                                                     &lsa_pol,
264                                                     LSA_POLICY_INFO_ACCOUNT_DOMAIN,
265                                                     &info,
266                                                     &result),
267                       "error querying info policy");
268
269         domain = info->account_domain.name.string;
270         domain_sid = info->account_domain.sid;
271
272         dcerpc_lsa_Close(b, mem_ctx, &lsa_pol, &result);
273         TALLOC_FREE(pipe_hnd); /* Done with this pipe */
274
275         /* Bail out if domain didn't get set. */
276         if (!domain) {
277                 DEBUG(0, ("Could not get domain name.\n"));
278                 goto done;
279         }
280
281         /* Create domain user */
282         status = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
283                                           &pipe_hnd);
284         if (!NT_STATUS_IS_OK(status)) {
285                 DEBUG(0, ("Error connecting to SAM pipe. Error was %s\n",
286                         nt_errstr(status) ));
287                 goto done;
288         }
289
290         b = pipe_hnd->binding_handle;
291
292         CHECK_DCERPC_ERR(dcerpc_samr_Connect2(b, mem_ctx,
293                                               pipe_hnd->desthost,
294                                               SAMR_ACCESS_ENUM_DOMAINS
295                                               | SAMR_ACCESS_LOOKUP_DOMAIN,
296                                               &sam_pol,
297                                               &result),
298                       "could not connect to SAM database");
299
300
301         CHECK_DCERPC_ERR(dcerpc_samr_OpenDomain(b, mem_ctx,
302                                                 &sam_pol,
303                                                 SAMR_DOMAIN_ACCESS_LOOKUP_INFO_1
304                                                 | SAMR_DOMAIN_ACCESS_CREATE_USER
305                                                 | SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
306                                                 domain_sid,
307                                                 &domain_pol,
308                                                 &result),
309                       "could not open domain");
310
311         /* Create domain user */
312         if ((acct_name = talloc_asprintf(mem_ctx, "%s$", lp_netbios_name())) == NULL) {
313                 status = NT_STATUS_NO_MEMORY;
314                 goto done;
315         }
316         strlower_m(acct_name);
317
318         init_lsa_String(&lsa_acct_name, acct_name);
319
320         acct_flags = SEC_GENERIC_READ | SEC_GENERIC_WRITE | SEC_GENERIC_EXECUTE |
321                      SEC_STD_WRITE_DAC | SEC_STD_DELETE |
322                      SAMR_USER_ACCESS_SET_PASSWORD |
323                      SAMR_USER_ACCESS_GET_ATTRIBUTES |
324                      SAMR_USER_ACCESS_SET_ATTRIBUTES;
325
326         DEBUG(10, ("Creating account with flags: %d\n",acct_flags));
327
328         status = dcerpc_samr_CreateUser2(b, mem_ctx,
329                                          &domain_pol,
330                                          &lsa_acct_name,
331                                          acb_info,
332                                          acct_flags,
333                                          &user_pol,
334                                          &access_granted,
335                                          &user_rid,
336                                          &result);
337         if (!NT_STATUS_IS_OK(status)) {
338                 goto done;
339         }
340         if (!NT_STATUS_IS_OK(result) &&
341             !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
342                 status = result;
343                 d_fprintf(stderr,_("Creation of workstation account failed\n"));
344
345                 /* If NT_STATUS_ACCESS_DENIED then we have a valid
346                    username/password combo but the user does not have
347                    administrator access. */
348
349                 if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
350                         d_fprintf(stderr, _("User specified does not have "
351                                             "administrator privileges\n"));
352
353                 goto done;
354         }
355
356         /* We *must* do this.... don't ask... */
357
358         if (NT_STATUS_IS_OK(result)) {
359                 dcerpc_samr_Close(b, mem_ctx, &user_pol, &result);
360         }
361
362         CHECK_DCERPC_ERR_DEBUG(dcerpc_samr_LookupNames(b, mem_ctx,
363                                                        &domain_pol,
364                                                        1,
365                                                        &lsa_acct_name,
366                                                        &user_rids,
367                                                        &name_types,
368                                                        &result),
369                             ("error looking up rid for user %s: %s/%s\n",
370                              acct_name, nt_errstr(status), nt_errstr(result)));
371
372         if (name_types.ids[0] != SID_NAME_USER) {
373                 DEBUG(0, ("%s is not a user account (type=%d)\n", acct_name, name_types.ids[0]));
374                 goto done;
375         }
376
377         user_rid = user_rids.ids[0];
378
379         /* Open handle on user */
380
381         CHECK_DCERPC_ERR_DEBUG(
382                 dcerpc_samr_OpenUser(b, mem_ctx,
383                                      &domain_pol,
384                                      SEC_FLAG_MAXIMUM_ALLOWED,
385                                      user_rid,
386                                      &user_pol,
387                                      &result),
388                 ("could not re-open existing user %s: %s/%s\n",
389                  acct_name, nt_errstr(status), nt_errstr(result)));
390         
391         /* Create a random machine account password */
392
393         clear_trust_password = generate_random_str(talloc_tos(), DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
394         E_md4hash(clear_trust_password, md4_trust_password);
395
396         /* Set password on machine account */
397
398         init_samr_CryptPassword(clear_trust_password,
399                                 &cli->user_session_key,
400                                 &crypt_pwd);
401
402         set_info.info24.password = crypt_pwd;
403         set_info.info24.password_expired = PASS_DONT_CHANGE_AT_NEXT_LOGON;
404
405         CHECK_DCERPC_ERR(dcerpc_samr_SetUserInfo2(b, mem_ctx,
406                                                   &user_pol,
407                                                   24,
408                                                   &set_info,
409                                                   &result),
410                       "error setting trust account password");
411
412         /* Why do we have to try to (re-)set the ACB to be the same as what
413            we passed in the samr_create_dom_user() call?  When a NT
414            workstation is joined to a domain by an administrator the
415            acb_info is set to 0x80.  For a normal user with "Add
416            workstations to the domain" rights the acb_info is 0x84.  I'm
417            not sure whether it is supposed to make a difference or not.  NT
418            seems to cope with either value so don't bomb out if the set
419            userinfo2 level 0x10 fails.  -tpot */
420
421         set_info.info16.acct_flags = acb_info;
422
423         /* Ignoring the return value is necessary for joining a domain
424            as a normal user with "Add workstation to domain" privilege. */
425
426         status = dcerpc_samr_SetUserInfo(b, mem_ctx,
427                                          &user_pol,
428                                          16,
429                                          &set_info,
430                                          &result);
431
432         dcerpc_samr_Close(b, mem_ctx, &user_pol, &result);
433         TALLOC_FREE(pipe_hnd); /* Done with this pipe */
434
435         /* Now check the whole process from top-to-bottom */
436
437         status = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
438                                           &pipe_hnd);
439         if (!NT_STATUS_IS_OK(status)) {
440                 DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n",
441                         nt_errstr(status) ));
442                 goto done;
443         }
444
445         status = rpccli_netlogon_setup_creds(pipe_hnd,
446                                         pipe_hnd->desthost, /* server name */
447                                         domain,        /* domain */
448                                         lp_netbios_name(), /* client name */
449                                         lp_netbios_name(), /* machine account name */
450                                         md4_trust_password,
451                                         sec_channel_type,
452                                         &neg_flags);
453
454         if (!NT_STATUS_IS_OK(status)) {
455                 DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n",
456                           nt_errstr(status)));
457
458                 if ( NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
459                      (sec_channel_type == SEC_CHAN_BDC) ) {
460                         d_fprintf(stderr, _("Please make sure that no computer "
461                                             "account\nnamed like this machine "
462                                             "(%s) exists in the domain\n"),
463                                  lp_netbios_name());
464                 }
465
466                 goto done;
467         }
468
469         /* We can only check the schannel connection if the client is allowed
470            to do this and the server supports it. If not, just assume success
471            (after all the rpccli_netlogon_setup_creds() succeeded, and we'll
472            do the same again (setup creds) in net_rpc_join_ok(). JRA. */
473
474         if (lp_client_schannel() && (neg_flags & NETLOGON_NEG_SCHANNEL)) {
475                 struct rpc_pipe_client *netlogon_schannel_pipe;
476
477                 status = cli_rpc_pipe_open_schannel_with_key(
478                         cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
479                         DCERPC_AUTH_LEVEL_PRIVACY, domain, &pipe_hnd->dc,
480                         &netlogon_schannel_pipe);
481
482                 if (!NT_STATUS_IS_OK(status)) {
483                         DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n",
484                                   nt_errstr(status)));
485
486                         if ( NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
487                              (sec_channel_type == SEC_CHAN_BDC) ) {
488                                 d_fprintf(stderr, _("Please make sure that no "
489                                                     "computer account\nnamed "
490                                                     "like this machine (%s) "
491                                                     "exists in the domain\n"),
492                                          lp_netbios_name());
493                         }
494
495                         goto done;
496                 }
497                 TALLOC_FREE(netlogon_schannel_pipe);
498         }
499
500         TALLOC_FREE(pipe_hnd);
501
502         /* Now store the secret in the secrets database */
503
504         strupper_m(discard_const_p(char, domain));
505
506         if (!secrets_store_domain_sid(domain, domain_sid)) {
507                 DEBUG(0, ("error storing domain sid for %s\n", domain));
508                 goto done;
509         }
510
511         if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
512                 DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
513         }
514
515         /* double-check, connection from scratch */
516         status = net_rpc_join_ok(c, domain, smbXcli_conn_remote_name(cli->conn),
517                                  smbXcli_conn_remote_sockaddr(cli->conn));
518         retval = NT_STATUS_IS_OK(status) ? 0 : -1;
519
520 done:
521
522         /* Display success or failure */
523
524         if (domain) {
525                 if (retval != 0) {
526                         fprintf(stderr,_("Unable to join domain %s.\n"),domain);
527                 } else {
528                         printf(_("Joined domain %s.\n"),domain);
529                 }
530         }
531
532         cli_shutdown(cli);
533
534         TALLOC_FREE(clear_trust_password);
535
536         return retval;
537 }
538
539 /**
540  * check that a join is OK
541  *
542  * @return A shell status integer (0 for success)
543  *
544  **/
545 int net_rpc_testjoin(struct net_context *c, int argc, const char **argv)
546 {
547         NTSTATUS nt_status;
548
549         if (c->display_usage) {
550                 d_printf(_("Usage\n"
551                            "net rpc testjoin\n"
552                            "    Test if a join is OK\n"));
553                 return 0;
554         }
555
556         /* Display success or failure */
557         nt_status = net_rpc_join_ok(c, c->opt_target_workgroup, NULL, NULL);
558         if (!NT_STATUS_IS_OK(nt_status)) {
559                 fprintf(stderr, _("Join to domain '%s' is not valid: %s\n"),
560                         c->opt_target_workgroup, nt_errstr(nt_status));
561                 return -1;
562         }
563
564         printf(_("Join to '%s' is OK\n"), c->opt_target_workgroup);
565         return 0;
566 }