s3-debug Remove 'AllowDebugChange' and use lp_set_cmdline() instead
[sfrench/samba-autobuild/.git] / source3 / utils / smbpasswd.c
1 /*
2  * Unix SMB/CIFS implementation. 
3  * Copyright (C) Jeremy Allison 1995-1998
4  * Copyright (C) Tim Potter     2001
5  * 
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License as published by the
8  * Free Software Foundation; either version 3 of the License, or (at your
9  * option) any later version.
10  * 
11  * This program is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
14  * more details.
15  * 
16  * You should have received a copy of the GNU General Public License along with
17  * this program; if not, see <http://www.gnu.org/licenses/>.  */
18
19 #include "includes.h"
20 #include "secrets.h"
21 #include "../librpc/gen_ndr/samr.h"
22
23 /*
24  * Next two lines needed for SunOS and don't
25  * hurt anything else...
26  */
27 extern char *optarg;
28 extern int optind;
29
30 /* forced running in root-mode */
31 static bool got_username = False;
32 static bool stdin_passwd_get = False;
33 static fstring user_name;
34 static char *new_passwd = NULL;
35 static const char *remote_machine = NULL;
36
37 static fstring ldap_secret;
38
39
40 /*********************************************************
41  Print command usage on stderr and die.
42 **********************************************************/
43 static void usage(void)
44 {
45         printf("When run by root:\n");
46         printf("    smbpasswd [options] [username]\n");
47         printf("otherwise:\n");
48         printf("    smbpasswd [options]\n\n");
49
50         printf("options:\n");
51         printf("  -L                   local mode (must be first option)\n");
52         printf("  -h                   print this usage message\n");
53         printf("  -s                   use stdin for password prompt\n");
54         printf("  -c smb.conf file     Use the given path to the smb.conf file\n");
55         printf("  -D LEVEL             debug level\n");
56         printf("  -r MACHINE           remote machine\n");
57         printf("  -U USER              remote username\n");
58
59         printf("extra options when run by root or in local mode:\n");
60         printf("  -a                   add user\n");
61         printf("  -d                   disable user\n");
62         printf("  -e                   enable user\n");
63         printf("  -i                   interdomain trust account\n");
64         printf("  -m                   machine trust account\n");
65         printf("  -n                   set no password\n");
66         printf("  -W                   use stdin ldap admin password\n");
67         printf("  -w PASSWORD          ldap admin password\n");
68         printf("  -x                   delete user\n");
69         printf("  -R ORDER             name resolve order\n");
70
71         exit(1);
72 }
73
74 static void set_line_buffering(FILE *f)
75 {
76         setvbuf(f, NULL, _IOLBF, 0);
77 }
78
79 /*******************************************************************
80  Process command line options
81  ******************************************************************/
82
83 static int process_options(int argc, char **argv, int local_flags)
84 {
85         int ch;
86         const char *configfile = get_dyn_CONFIGFILE();
87
88         local_flags |= LOCAL_SET_PASSWORD;
89
90         ZERO_STRUCT(user_name);
91
92         user_name[0] = '\0';
93
94         while ((ch = getopt(argc, argv, "c:axdehminjr:sw:R:D:U:LW")) != EOF) {
95                 switch(ch) {
96                 case 'L':
97 #if !defined(NSS_WRAPPER)
98                         if (getuid() != 0) {
99                                 fprintf(stderr, "smbpasswd -L can only be used by root.\n");
100                                 exit(1);
101                         }
102 #endif
103                         local_flags |= LOCAL_AM_ROOT;
104                         break;
105                 case 'c':
106                         configfile = optarg;
107                         break;
108                 case 'a':
109                         local_flags |= LOCAL_ADD_USER;
110                         break;
111                 case 'x':
112                         local_flags |= LOCAL_DELETE_USER;
113                         local_flags &= ~LOCAL_SET_PASSWORD;
114                         break;
115                 case 'd':
116                         local_flags |= LOCAL_DISABLE_USER;
117                         local_flags &= ~LOCAL_SET_PASSWORD;
118                         break;
119                 case 'e':
120                         local_flags |= LOCAL_ENABLE_USER;
121                         local_flags &= ~LOCAL_SET_PASSWORD;
122                         break;
123                 case 'm':
124                         local_flags |= LOCAL_TRUST_ACCOUNT;
125                         break;
126                 case 'i':
127                         local_flags |= LOCAL_INTERDOM_ACCOUNT;
128                         break;
129                 case 'j':
130                         d_printf("See 'net join' for this functionality\n");
131                         exit(1);
132                         break;
133                 case 'n':
134                         local_flags |= LOCAL_SET_NO_PASSWORD;
135                         local_flags &= ~LOCAL_SET_PASSWORD;
136                         new_passwd = smb_xstrdup("NO PASSWORD");
137                         break;
138                 case 'r':
139                         remote_machine = optarg;
140                         break;
141                 case 's':
142                         set_line_buffering(stdin);
143                         set_line_buffering(stdout);
144                         set_line_buffering(stderr);
145                         stdin_passwd_get = True;
146                         break;
147                 case 'w':
148                         local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
149                         fstrcpy(ldap_secret, optarg);
150                         break;
151                 case 'R':
152                         lp_set_name_resolve_order(optarg);
153                         break;
154                 case 'D':
155                         DEBUGLEVEL = atoi(optarg);
156                         break;
157                 case 'U': {
158                         got_username = True;
159                         fstrcpy(user_name, optarg);
160                         break;
161                 case 'W':
162                         local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
163                         *ldap_secret = '\0';
164                         break;
165                 }
166                 case 'h':
167                 default:
168                         usage();
169                 }
170         }
171
172         argc -= optind;
173         argv += optind;
174
175         switch(argc) {
176         case 0:
177                 if (!got_username)
178                         fstrcpy(user_name, "");
179                 break;
180         case 1:
181                 if (!(local_flags & LOCAL_AM_ROOT)) {
182                         usage();
183                 } else {
184                         if (got_username) {
185                                 usage();
186                         } else {
187                                 fstrcpy(user_name, argv[0]);
188                         }
189                 }
190                 break;
191         default:
192                 usage();
193         }
194
195         if (!lp_load(configfile,True,False,False,True)) {
196                 fprintf(stderr, "Can't load %s - run testparm to debug it\n", 
197                         configfile);
198                 exit(1);
199         }
200
201         return local_flags;
202 }
203
204 /*************************************************************
205  Utility function to prompt for new password.
206 *************************************************************/
207 static char *prompt_for_new_password(bool stdin_get)
208 {
209         char *p;
210         fstring new_pw;
211
212         ZERO_ARRAY(new_pw);
213
214         p = get_pass("New SMB password:", stdin_get);
215
216         fstrcpy(new_pw, p);
217         SAFE_FREE(p);
218
219         p = get_pass("Retype new SMB password:", stdin_get);
220
221         if (strcmp(p, new_pw)) {
222                 fprintf(stderr, "Mismatch - password unchanged.\n");
223                 ZERO_ARRAY(new_pw);
224                 SAFE_FREE(p);
225                 return NULL;
226         }
227
228         return p;
229 }
230
231
232 /*************************************************************
233  Change a password either locally or remotely.
234 *************************************************************/
235
236 static NTSTATUS password_change(const char *remote_mach, char *username, 
237                                 char *old_passwd, char *new_pw,
238                                 int local_flags)
239 {
240         NTSTATUS ret;
241         char *err_str = NULL;
242         char *msg_str = NULL;
243
244         if (remote_mach != NULL) {
245                 if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|
246                                    LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
247                                    LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
248                         /* these things can't be done remotely yet */
249                         fprintf(stderr, "Invalid remote operation!\n");
250                         return NT_STATUS_UNSUCCESSFUL;
251                 }
252                 ret = remote_password_change(remote_mach, username,
253                                              old_passwd, new_pw, &err_str);
254         } else {
255                 ret = local_password_change(username, local_flags, new_pw,
256                                             &err_str, &msg_str);
257         }
258
259         if (msg_str) {
260                 printf("%s", msg_str);
261         }
262         if (err_str) {
263                 fprintf(stderr, "%s", err_str);
264         }
265         if (!NT_STATUS_IS_OK(ret) && !err_str) {
266                 fprintf(stderr, "Failed to change password!\n");
267         }
268
269         SAFE_FREE(msg_str);
270         SAFE_FREE(err_str);
271         return ret;
272 }
273
274 /*******************************************************************
275  Store the LDAP admin password in secrets.tdb
276  ******************************************************************/
277 static bool store_ldap_admin_pw (char* pw)
278 {       
279         if (!pw) 
280                 return False;
281
282         if (!secrets_init())
283                 return False;
284
285         return secrets_store_ldap_pw(lp_ldap_admin_dn(), pw);
286 }
287
288
289 /*************************************************************
290  Handle password changing for root.
291 *************************************************************/
292
293 static int process_root(int local_flags)
294 {
295         struct passwd  *pwd;
296         int result = 0;
297         char *old_passwd = NULL;
298
299         if (local_flags & LOCAL_SET_LDAP_ADMIN_PW) {
300                 char *ldap_admin_dn = lp_ldap_admin_dn();
301                 if ( ! *ldap_admin_dn ) {
302                         DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n"));
303                         goto done;
304                 }
305
306                 printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn);
307                 if ( ! *ldap_secret ) {
308                         new_passwd = prompt_for_new_password(stdin_passwd_get);
309                         fstrcpy(ldap_secret, new_passwd);
310                 }
311                 if (!store_ldap_admin_pw(ldap_secret)) {
312                         DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
313                 }
314                 goto done;
315         }
316
317         /* Ensure passdb startup(). */
318         if(!initialize_password_db(False, NULL)) {
319                 DEBUG(0, ("Failed to open passdb!\n"));
320                 exit(1);
321         }
322
323         /* Ensure we have a SAM sid. */
324         get_global_sam_sid();
325
326         /*
327          * Ensure both add/delete user are not set
328          * Ensure add/delete user and either remote machine or join domain are
329          * not both set.
330          */     
331         if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) || 
332            ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) && 
333                 (remote_machine != NULL))) {
334                 usage();
335         }
336
337         /* Only load interfaces if we are doing network operations. */
338
339         if (remote_machine) {
340                 load_interfaces();
341         }
342
343         if (!user_name[0] && (pwd = getpwuid_alloc(talloc_tos(), geteuid()))) {
344                 fstrcpy(user_name, pwd->pw_name);
345                 TALLOC_FREE(pwd);
346         } 
347
348         if (!user_name[0]) {
349                 fprintf(stderr,"You must specify a username\n");
350                 exit(1);
351         }
352
353         if (local_flags & LOCAL_TRUST_ACCOUNT) {
354                 /* add the $ automatically */
355                 static fstring buf;
356
357                 /*
358                  * Remove any trailing '$' before we
359                  * generate the initial machine password.
360                  */
361
362                 if (user_name[strlen(user_name)-1] == '$') {
363                         user_name[strlen(user_name)-1] = 0;
364                 }
365
366                 if (local_flags & LOCAL_ADD_USER) {
367                         SAFE_FREE(new_passwd);
368                         new_passwd = smb_xstrdup(user_name);
369                         strlower_m(new_passwd);
370                 }
371
372                 /*
373                  * Now ensure the username ends in '$' for
374                  * the machine add.
375                  */
376
377                 slprintf(buf, sizeof(buf)-1, "%s$", user_name);
378                 fstrcpy(user_name, buf);
379         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
380                 static fstring buf;
381
382                 if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) {
383                         /*
384                          * Prompt for trusting domain's account password
385                          */
386                         new_passwd = prompt_for_new_password(stdin_passwd_get);
387                         if(!new_passwd) {
388                                 fprintf(stderr, "Unable to get newpassword.\n");
389                                 exit(1);
390                         }
391                 }
392
393                 /* prepare uppercased and '$' terminated username */
394                 slprintf(buf, sizeof(buf) - 1, "%s$", user_name);
395                 fstrcpy(user_name, buf);
396
397         } else {
398
399                 if (remote_machine != NULL) {
400                         old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
401                         if(!old_passwd) {
402                                 fprintf(stderr, "Unable to get old password.\n");
403                                 exit(1);
404                         }
405                 }
406
407                 if (!(local_flags & LOCAL_SET_PASSWORD)) {
408
409                         /*
410                          * If we are trying to enable a user, first we need to find out
411                          * if they are using a modern version of the smbpasswd file that
412                          * disables a user by just writing a flag into the file. If so
413                          * then we can re-enable a user without prompting for a new
414                          * password. If not (ie. they have a no stored password in the
415                          * smbpasswd file) then we need to prompt for a new password.
416                          */
417
418                         if(local_flags & LOCAL_ENABLE_USER) {
419                                 struct samu *sampass = NULL;
420
421                                 sampass = samu_new( NULL );
422                                 if (!sampass) {
423                                         fprintf(stderr, "talloc fail for struct samu.\n");
424                                         exit(1);
425                                 }
426                                 if (!pdb_getsampwnam(sampass, user_name)) {
427                                         fprintf(stderr, "Failed to find user %s in passdb backend.\n",
428                                                 user_name );
429                                         exit(1);
430                                 }
431
432                                 if(pdb_get_nt_passwd(sampass) == NULL) {
433                                         local_flags |= LOCAL_SET_PASSWORD;
434                                 }
435                                 TALLOC_FREE(sampass);
436                         }
437                 }
438
439                 if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) {
440
441                         new_passwd = prompt_for_new_password(stdin_passwd_get);
442                         if(!new_passwd) {
443                                 fprintf(stderr, "Unable to get new password.\n");
444                                 exit(1);
445                         }
446                 }
447         }
448
449         if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name,
450                                              old_passwd, new_passwd,
451                                              local_flags))) {
452                 result = 1;
453                 goto done;
454         } 
455
456         if(remote_machine) {
457                 printf("Password changed for user %s on %s.\n", user_name, remote_machine );
458         } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
459                 struct samu *sampass = NULL;
460
461                 sampass = samu_new( NULL );
462                 if (!sampass) {
463                         fprintf(stderr, "talloc fail for struct samu.\n");
464                         exit(1);
465                 }
466
467                 if (!pdb_getsampwnam(sampass, user_name)) {
468                         fprintf(stderr, "Failed to find user %s in passdb backend.\n",
469                                 user_name );
470                         exit(1);
471                 }
472
473                 printf("Password changed for user %s.", user_name );
474                 if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) {
475                         printf(" User has disabled flag set.");
476                 }
477                 if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) {
478                         printf(" User has no password flag set.");
479                 }
480                 printf("\n");
481                 TALLOC_FREE(sampass);
482         }
483
484  done:
485         SAFE_FREE(old_passwd);
486         SAFE_FREE(new_passwd);
487         return result;
488 }
489
490
491 /*************************************************************
492  Handle password changing for non-root.
493 *************************************************************/
494
495 static int process_nonroot(int local_flags)
496 {
497         struct passwd  *pwd = NULL;
498         int result = 0;
499         char *old_pw = NULL;
500         char *new_pw = NULL;
501
502         if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) {
503                 /* Extra flags that we can't honor non-root */
504                 usage();
505         }
506
507         if (!user_name[0]) {
508                 pwd = getpwuid_alloc(talloc_tos(), getuid());
509                 if (pwd) {
510                         fstrcpy(user_name,pwd->pw_name);
511                         TALLOC_FREE(pwd);
512                 } else {
513                         fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid());
514                         exit(1);
515                 }
516         }
517
518         /*
519          * A non-root user is always setting a password
520          * via a remote machine (even if that machine is
521          * localhost).
522          */     
523
524         load_interfaces(); /* Delayed from main() */
525
526         if (remote_machine == NULL) {
527                 remote_machine = "127.0.0.1";
528         }
529
530         if (remote_machine != NULL) {
531                 old_pw = get_pass("Old SMB password:",stdin_passwd_get);
532         }
533
534         if (!new_passwd) {
535                 new_pw = prompt_for_new_password(stdin_passwd_get);
536         }
537         else
538                 new_pw = smb_xstrdup(new_passwd);
539
540         if (!new_pw) {
541                 fprintf(stderr, "Unable to get new password.\n");
542                 exit(1);
543         }
544
545         if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name, old_pw,
546                                              new_pw, 0))) {
547                 result = 1;
548                 goto done;
549         }
550
551         printf("Password changed for user %s\n", user_name);
552
553  done:
554         SAFE_FREE(old_pw);
555         SAFE_FREE(new_pw);
556
557         return result;
558 }
559
560
561
562 /*********************************************************
563  Start here.
564 **********************************************************/
565 int main(int argc, char **argv)
566 {       
567         TALLOC_CTX *frame = talloc_stackframe();
568         int local_flags = 0;
569         int ret;
570
571 #if defined(HAVE_SET_AUTH_PARAMETERS)
572         set_auth_parameters(argc, argv);
573 #endif /* HAVE_SET_AUTH_PARAMETERS */
574
575         if (getuid() == 0) {
576                 local_flags = LOCAL_AM_ROOT;
577         }
578
579         load_case_tables();
580
581         local_flags = process_options(argc, argv, local_flags);
582
583         setup_logging("smbpasswd", DEBUG_STDERR);
584
585         /*
586          * Set the machine NETBIOS name if not already
587          * set from the config file. 
588          */ 
589
590         if (!init_names())
591                 return 1;
592
593         /* Check the effective uid - make sure we are not setuid */
594         if (is_setuid_root()) {
595                 fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
596                 exit(1);
597         }
598
599         if (local_flags & LOCAL_AM_ROOT) {
600                 secrets_init();
601                 return process_root(local_flags);
602         } 
603
604         ret = process_nonroot(local_flags);
605         TALLOC_FREE(frame);
606         return ret;
607 }