Merge commit 'origin/master' into libcli-auth-merge-without-netlogond
[bbaumbach/samba-autobuild/.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
25 /* Macro for checking RPC error codes to make things more readable */
26
27 #define CHECK_RPC_ERR(rpc, msg) \
28         if (!NT_STATUS_IS_OK(result = rpc)) { \
29                 DEBUG(0, (msg ": %s\n", nt_errstr(result))); \
30                 goto done; \
31         }
32
33 #define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
34         if (!NT_STATUS_IS_OK(result = rpc)) { \
35                 DEBUG(0, debug_args); \
36                 goto done; \
37         }
38
39 /**
40  * confirm that a domain join is still valid
41  *
42  * @return A shell status integer (0 for success)
43  *
44  **/
45 NTSTATUS net_rpc_join_ok(struct net_context *c, const char *domain,
46                          const char *server, struct sockaddr_storage *pss)
47 {
48         enum security_types sec;
49         unsigned int conn_flags = NET_FLAGS_PDC;
50         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
51         struct cli_state *cli = NULL;
52         struct rpc_pipe_client *pipe_hnd = NULL;
53         struct rpc_pipe_client *netlogon_pipe = NULL;
54         NTSTATUS ntret = NT_STATUS_UNSUCCESSFUL;
55
56         sec = (enum security_types)lp_security();
57
58         if (sec == SEC_ADS) {
59                 /* Connect to IPC$ using machine account's credentials. We don't use anonymous
60                    connection here, as it may be denied by server's local policy. */
61                 net_use_machine_account(c);
62
63         } else {
64                 /* some servers (e.g. WinNT) don't accept machine-authenticated
65                    smb connections */
66                 conn_flags |= NET_FLAGS_ANONYMOUS;
67         }
68
69         /* Connect to remote machine */
70         ntret = net_make_ipc_connection_ex(c, domain, server, pss, conn_flags,
71                                            &cli);
72         if (!NT_STATUS_IS_OK(ntret)) {
73                 return ntret;
74         }
75
76         /* Setup the creds as though we're going to do schannel... */
77         ntret = get_schannel_session_key(cli, domain, &neg_flags,
78                                          &netlogon_pipe);
79
80         /* We return NT_STATUS_INVALID_NETWORK_RESPONSE if the server is refusing
81            to negotiate schannel, but the creds were set up ok. That'll have to do. */
82
83         if (!NT_STATUS_IS_OK(ntret)) {
84                 if (NT_STATUS_EQUAL(ntret, NT_STATUS_INVALID_NETWORK_RESPONSE)) {
85                         cli_shutdown(cli);
86                         return NT_STATUS_OK;
87                 } else {
88                         DEBUG(0,("net_rpc_join_ok: failed to get schannel session "
89                                         "key from server %s for domain %s. Error was %s\n",
90                                 cli->desthost, domain, nt_errstr(ntret) ));
91                         cli_shutdown(cli);
92                         return ntret;
93                 }
94         }
95
96         /* Only do the rest of the schannel test if the client is allowed to do this. */
97         if (!lp_client_schannel()) {
98                 cli_shutdown(cli);
99                 /* We're good... */
100                 return ntret;
101         }
102
103         ntret = cli_rpc_pipe_open_schannel_with_key(
104                 cli, &ndr_table_netlogon.syntax_id, 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
131 int 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         struct policy_handle 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         clear_trust_password = generate_random_str(talloc_tos(), DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
338         E_md4hash(clear_trust_password, md4_trust_password);
339
340         /* Set password on machine account */
341
342         init_samr_CryptPassword(clear_trust_password,
343                                 &cli->user_session_key,
344                                 &crypt_pwd);
345
346         set_info.info24.password = crypt_pwd;
347         set_info.info24.password_expired = PASS_DONT_CHANGE_AT_NEXT_LOGON;
348
349         CHECK_RPC_ERR(rpccli_samr_SetUserInfo2(pipe_hnd, mem_ctx,
350                                                &user_pol,
351                                                24,
352                                                &set_info),
353                       "error setting trust account password");
354
355         /* Why do we have to try to (re-)set the ACB to be the same as what
356            we passed in the samr_create_dom_user() call?  When a NT
357            workstation is joined to a domain by an administrator the
358            acb_info is set to 0x80.  For a normal user with "Add
359            workstations to the domain" rights the acb_info is 0x84.  I'm
360            not sure whether it is supposed to make a difference or not.  NT
361            seems to cope with either value so don't bomb out if the set
362            userinfo2 level 0x10 fails.  -tpot */
363
364         set_info.info16.acct_flags = acb_info;
365
366         /* Ignoring the return value is necessary for joining a domain
367            as a normal user with "Add workstation to domain" privilege. */
368
369         result = rpccli_samr_SetUserInfo(pipe_hnd, mem_ctx,
370                                          &user_pol,
371                                          16,
372                                          &set_info);
373
374         rpccli_samr_Close(pipe_hnd, mem_ctx, &user_pol);
375         TALLOC_FREE(pipe_hnd); /* Done with this pipe */
376
377         /* Now check the whole process from top-to-bottom */
378
379         result = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
380                                           &pipe_hnd);
381         if (!NT_STATUS_IS_OK(result)) {
382                 DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n",
383                         nt_errstr(result) ));
384                 goto done;
385         }
386
387         result = rpccli_netlogon_setup_creds(pipe_hnd,
388                                         cli->desthost, /* server name */
389                                         domain,        /* domain */
390                                         global_myname(), /* client name */
391                                         global_myname(), /* machine account name */
392                                         md4_trust_password,
393                                         sec_channel_type,
394                                         &neg_flags);
395
396         if (!NT_STATUS_IS_OK(result)) {
397                 DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n",
398                           nt_errstr(result)));
399
400                 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
401                      (sec_channel_type == SEC_CHAN_BDC) ) {
402                         d_fprintf(stderr, "Please make sure that no computer account\n"
403                                  "named like this machine (%s) exists in the domain\n",
404                                  global_myname());
405                 }
406
407                 goto done;
408         }
409
410         /* We can only check the schannel connection if the client is allowed
411            to do this and the server supports it. If not, just assume success
412            (after all the rpccli_netlogon_setup_creds() succeeded, and we'll
413            do the same again (setup creds) in net_rpc_join_ok(). JRA. */
414
415         if (lp_client_schannel() && (neg_flags & NETLOGON_NEG_SCHANNEL)) {
416                 struct rpc_pipe_client *netlogon_schannel_pipe;
417
418                 result = cli_rpc_pipe_open_schannel_with_key(
419                         cli, &ndr_table_netlogon.syntax_id,
420                         PIPE_AUTH_LEVEL_PRIVACY, domain, pipe_hnd->dc,
421                         &netlogon_schannel_pipe);
422
423                 if (!NT_STATUS_IS_OK(result)) {
424                         DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n",
425                                   nt_errstr(result)));
426
427                         if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
428                              (sec_channel_type == SEC_CHAN_BDC) ) {
429                                 d_fprintf(stderr, "Please make sure that no computer account\n"
430                                          "named like this machine (%s) exists in the domain\n",
431                                          global_myname());
432                         }
433
434                         goto done;
435                 }
436                 TALLOC_FREE(netlogon_schannel_pipe);
437         }
438
439         TALLOC_FREE(pipe_hnd);
440
441         /* Now store the secret in the secrets database */
442
443         strupper_m(CONST_DISCARD(char *, domain));
444
445         if (!secrets_store_domain_sid(domain, domain_sid)) {
446                 DEBUG(0, ("error storing domain sid for %s\n", domain));
447                 goto done;
448         }
449
450         if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
451                 DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
452         }
453
454         /* double-check, connection from scratch */
455         result = net_rpc_join_ok(c, domain, cli->desthost, &cli->dest_ss);
456         retval = NT_STATUS_IS_OK(result) ? 0 : -1;
457
458 done:
459
460         /* Display success or failure */
461
462         if (domain) {
463                 if (retval != 0) {
464                         fprintf(stderr,"Unable to join domain %s.\n",domain);
465                 } else {
466                         printf("Joined domain %s.\n",domain);
467                 }
468         }
469
470         cli_shutdown(cli);
471
472         TALLOC_FREE(clear_trust_password);
473
474         return retval;
475 }
476
477 /**
478  * check that a join is OK
479  *
480  * @return A shell status integer (0 for success)
481  *
482  **/
483 int net_rpc_testjoin(struct net_context *c, int argc, const char **argv)
484 {
485         NTSTATUS nt_status;
486
487         if (c->display_usage) {
488                 d_printf("Usage\n"
489                          "net rpc testjoin\n"
490                          "    Test if a join is OK\n");
491                 return 0;
492         }
493
494         /* Display success or failure */
495         nt_status = net_rpc_join_ok(c, c->opt_target_workgroup, NULL, NULL);
496         if (!NT_STATUS_IS_OK(nt_status)) {
497                 fprintf(stderr,"Join to domain '%s' is not valid: %s\n",
498                         c->opt_target_workgroup, nt_errstr(nt_status));
499                 return -1;
500         }
501
502         printf("Join to '%s' is OK\n", c->opt_target_workgroup);
503         return 0;
504 }