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s4:winbindd: do not drop the workgroup name in the getgrgid call
[Samba.git] / source3 / utils / smbpasswd.c
blobd93261eade342efb7505e3c6ec25863bdbf69f42
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 "system/passwd.h"
21 #include "secrets.h"
22 #include "../librpc/gen_ndr/samr.h"
23 #include "../lib/util/util_pw.h"
24 #include "passdb.h"
25
26 /*
27 * Next two lines needed for SunOS and don't
28 * hurt anything else...
29 */
30 extern char *optarg;
31 extern int optind;
32
33 /* forced running in root-mode */
34 static bool got_username = False;
35 static bool stdin_passwd_get = False;
36 static fstring user_name;
37 static char *new_passwd = NULL;
38 static const char *remote_machine = NULL;
39
40 static fstring ldap_secret;
41
42
43 /*********************************************************
44 Print command usage on stderr and die.
45 **********************************************************/
46 static void usage(void)
47 {
48 printf("When run by root:\n");
49 printf(" smbpasswd [options] [username]\n");
50 printf("otherwise:\n");
51 printf(" smbpasswd [options]\n\n");
52
53 printf("options:\n");
54 printf(" -L local mode (must be first option)\n");
55 printf(" -h print this usage message\n");
56 printf(" -s use stdin for password prompt\n");
57 printf(" -c smb.conf file Use the given path to the smb.conf file\n");
58 printf(" -D LEVEL debug level\n");
59 printf(" -r MACHINE remote machine\n");
60 printf(" -U USER remote username\n");
61
62 printf("extra options when run by root or in local mode:\n");
63 printf(" -a add user\n");
64 printf(" -d disable user\n");
65 printf(" -e enable user\n");
66 printf(" -i interdomain trust account\n");
67 printf(" -m machine trust account\n");
68 printf(" -n set no password\n");
69 printf(" -W use stdin ldap admin password\n");
70 printf(" -w PASSWORD ldap admin password\n");
71 printf(" -x delete user\n");
72 printf(" -R ORDER name resolve order\n");
73
74 exit(1);
75 }
76
77 static void set_line_buffering(FILE *f)
78 {
79 setvbuf(f, NULL, _IOLBF, 0);
80 }
81
82 /*******************************************************************
83 Process command line options
84 ******************************************************************/
85
86 static int process_options(int argc, char **argv, int local_flags)
87 {
88 int ch;
89 const char *configfile = get_dyn_CONFIGFILE();
90
91 local_flags |= LOCAL_SET_PASSWORD;
92
93 ZERO_STRUCT(user_name);
94
95 user_name[0] = '\0';
96
97 while ((ch = getopt(argc, argv, "c:axdehminjr:sw:R:D:U:LW")) != EOF) {
98 switch(ch) {
99 case 'L':
100 #if !defined(NSS_WRAPPER)
101 if (getuid() != 0) {
102 fprintf(stderr, "smbpasswd -L can only be used by root.\n");
103 exit(1);
104 }
105 #endif
106 local_flags |= LOCAL_AM_ROOT;
107 break;
108 case 'c':
109 configfile = optarg;
110 set_dyn_CONFIGFILE(optarg);
111 break;
112 case 'a':
113 local_flags |= LOCAL_ADD_USER;
114 break;
115 case 'x':
116 local_flags |= LOCAL_DELETE_USER;
117 local_flags &= ~LOCAL_SET_PASSWORD;
118 break;
119 case 'd':
120 local_flags |= LOCAL_DISABLE_USER;
121 local_flags &= ~LOCAL_SET_PASSWORD;
122 break;
123 case 'e':
124 local_flags |= LOCAL_ENABLE_USER;
125 local_flags &= ~LOCAL_SET_PASSWORD;
126 break;
127 case 'm':
128 local_flags |= LOCAL_TRUST_ACCOUNT;
129 break;
130 case 'i':
131 local_flags |= LOCAL_INTERDOM_ACCOUNT;
132 break;
133 case 'j':
134 d_printf("See 'net join' for this functionality\n");
135 exit(1);
136 break;
137 case 'n':
138 local_flags |= LOCAL_SET_NO_PASSWORD;
139 local_flags &= ~LOCAL_SET_PASSWORD;
140 SAFE_FREE(new_passwd);
141 new_passwd = smb_xstrdup("NO PASSWORD");
142 break;
143 case 'r':
144 remote_machine = optarg;
145 break;
146 case 's':
147 set_line_buffering(stdin);
148 set_line_buffering(stdout);
149 set_line_buffering(stderr);
150 stdin_passwd_get = True;
151 break;
152 case 'w':
153 local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
154 fstrcpy(ldap_secret, optarg);
155 break;
156 case 'R':
157 lp_set_cmdline("name resolve order", optarg);
158 break;
159 case 'D':
160 lp_set_cmdline("log level", optarg);
161 break;
162 case 'U': {
163 got_username = True;
164 fstrcpy(user_name, optarg);
165 break;
166 case 'W':
167 local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
168 *ldap_secret = '\0';
169 break;
170 }
171 case 'h':
172 default:
173 usage();
174 }
175 }
176
177 argc -= optind;
178 argv += optind;
179
180 switch(argc) {
181 case 0:
182 if (!got_username)
183 fstrcpy(user_name, "");
184 break;
185 case 1:
186 if (!(local_flags & LOCAL_AM_ROOT)) {
187 usage();
188 } else {
189 if (got_username) {
190 usage();
191 } else {
192 fstrcpy(user_name, argv[0]);
193 }
194 }
195 break;
196 default:
197 usage();
198 }
199
200 if (!lp_load_global(configfile)) {
201 fprintf(stderr, "Can't load %s - run testparm to debug it\n",
202 configfile);
203 exit(1);
204 }
205
206 return local_flags;
207 }
208
209 /*************************************************************
210 Utility function to prompt for new password.
211 *************************************************************/
212 static char *prompt_for_new_password(bool stdin_get)
213 {
214 char *p;
215 fstring new_pw;
216
217 ZERO_ARRAY(new_pw);
218
219 p = get_pass("New SMB password:", stdin_get);
220
221 fstrcpy(new_pw, p);
222 SAFE_FREE(p);
223
224 p = get_pass("Retype new SMB password:", stdin_get);
225
226 if (strcmp(p, new_pw)) {
227 fprintf(stderr, "Mismatch - password unchanged.\n");
228 ZERO_ARRAY(new_pw);
229 SAFE_FREE(p);
230 return NULL;
231 }
232
233 return p;
234 }
235
236
237 /*************************************************************
238 Change a password either locally or remotely.
239 *************************************************************/
240
241 static NTSTATUS password_change(const char *remote_mach, char *username,
242 char *old_passwd, char *new_pw,
243 int local_flags)
244 {
245 NTSTATUS ret;
246 char *err_str = NULL;
247 char *msg_str = NULL;
248
249 if (remote_mach != NULL) {
250 if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|
251 LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
252 LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
253 /* these things can't be done remotely yet */
254 fprintf(stderr, "Invalid remote operation!\n");
255 return NT_STATUS_UNSUCCESSFUL;
256 }
257 ret = remote_password_change(remote_mach, username,
258 old_passwd, new_pw, &err_str);
259 } else {
260 ret = local_password_change(username, local_flags, new_pw,
261 &err_str, &msg_str);
262 }
263
264 if (msg_str) {
265 printf("%s", msg_str);
266 }
267 if (err_str) {
268 fprintf(stderr, "%s", err_str);
269 }
270 if (!NT_STATUS_IS_OK(ret) && !err_str) {
271 fprintf(stderr, "Failed to change password!\n");
272 }
273
274 SAFE_FREE(msg_str);
275 SAFE_FREE(err_str);
276 return ret;
277 }
278
279 /*******************************************************************
280 Store the LDAP admin password in secrets.tdb
281 ******************************************************************/
282 static bool store_ldap_admin_pw (char* pw)
283 {
284 if (!pw)
285 return False;
286
287 if (!secrets_init())
288 return False;
289
290 return secrets_store_ldap_pw(lp_ldap_admin_dn(talloc_tos()), pw);
291 }
292
293
294 /*************************************************************
295 Handle password changing for root.
296 *************************************************************/
297
298 static int process_root(int local_flags)
299 {
300 struct passwd *pwd;
301 int result = 0;
302 char *old_passwd = NULL;
303
304 if (local_flags & LOCAL_SET_LDAP_ADMIN_PW) {
305 char *ldap_admin_dn = lp_ldap_admin_dn(talloc_tos());
306 if ( ! *ldap_admin_dn ) {
307 DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n"));
308 goto done;
309 }
310
311 printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn);
312 if ( ! *ldap_secret ) {
313 new_passwd = prompt_for_new_password(stdin_passwd_get);
314 fstrcpy(ldap_secret, new_passwd);
315 }
316 if (!store_ldap_admin_pw(ldap_secret)) {
317 DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
318 }
319 goto done;
320 }
321
322 /* Ensure passdb startup(). */
323 if(!initialize_password_db(False, NULL)) {
324 DEBUG(0, ("Failed to open passdb!\n"));
325 exit(1);
326 }
327
328 /* Ensure we have a SAM sid. */
329 get_global_sam_sid();
330
331 /*
332 * Ensure both add/delete user are not set
333 * Ensure add/delete user and either remote machine or join domain are
334 * not both set.
335 */
336 if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
337 ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
338 (remote_machine != NULL))) {
339 usage();
340 }
341
342 /* Only load interfaces if we are doing network operations. */
343
344 if (remote_machine) {
345 load_interfaces();
346 }
347
348 if (!user_name[0] && (pwd = getpwuid_alloc(talloc_tos(), geteuid()))) {
349 fstrcpy(user_name, pwd->pw_name);
350 TALLOC_FREE(pwd);
351 }
352
353 if (!user_name[0]) {
354 fprintf(stderr,"You must specify a username\n");
355 exit(1);
356 }
357
358 if (local_flags & LOCAL_TRUST_ACCOUNT) {
359 /* add the $ automatically */
360 static fstring buf;
361
362 /*
363 * Remove any trailing '$' before we
364 * generate the initial machine password.
365 */
366
367 if (user_name[strlen(user_name)-1] == '$') {
368 user_name[strlen(user_name)-1] = 0;
369 }
370
371 if (local_flags & LOCAL_ADD_USER) {
372 SAFE_FREE(new_passwd);
373 new_passwd = smb_xstrdup(user_name);
374 if (!strlower_m(new_passwd)) {
375 fprintf(stderr, "strlower_m %s failed\n",
376 new_passwd);
377 exit(1);
378 }
379 }
380
381 /*
382 * Now ensure the username ends in '$' for
383 * the machine add.
384 */
385
386 slprintf(buf, sizeof(buf)-1, "%s$", user_name);
387 strlcpy(user_name, buf, sizeof(user_name));
388 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
389 static fstring buf;
390
391 if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) {
392 /*
393 * Prompt for trusting domain's account password
394 */
395 new_passwd = prompt_for_new_password(stdin_passwd_get);
396 if(!new_passwd) {
397 fprintf(stderr, "Unable to get newpassword.\n");
398 exit(1);
399 }
400 }
401
402 /* prepare uppercased and '$' terminated username */
403 slprintf(buf, sizeof(buf) - 1, "%s$", user_name);
404 strlcpy(user_name, buf, sizeof(user_name));
405
406 } else {
407
408 if (remote_machine != NULL) {
409 old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
410 if(!old_passwd) {
411 fprintf(stderr, "Unable to get old password.\n");
412 exit(1);
413 }
414 }
415
416 if (!(local_flags & LOCAL_SET_PASSWORD)) {
417
418 /*
419 * If we are trying to enable a user, first we need to find out
420 * if they are using a modern version of the smbpasswd file that
421 * disables a user by just writing a flag into the file. If so
422 * then we can re-enable a user without prompting for a new
423 * password. If not (ie. they have a no stored password in the
424 * smbpasswd file) then we need to prompt for a new password.
425 */
426
427 if(local_flags & LOCAL_ENABLE_USER) {
428 struct samu *sampass = NULL;
429
430 sampass = samu_new( NULL );
431 if (!sampass) {
432 fprintf(stderr, "talloc fail for struct samu.\n");
433 exit(1);
434 }
435 if (!pdb_getsampwnam(sampass, user_name)) {
436 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
437 user_name );
438 exit(1);
439 }
440
441 if(pdb_get_nt_passwd(sampass) == NULL) {
442 local_flags |= LOCAL_SET_PASSWORD;
443 }
444 TALLOC_FREE(sampass);
445 }
446 }
447
448 if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) {
449
450 new_passwd = prompt_for_new_password(stdin_passwd_get);
451 if(!new_passwd) {
452 fprintf(stderr, "Unable to get new password.\n");
453 exit(1);
454 }
455 }
456 }
457
458 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name,
459 old_passwd, new_passwd,
460 local_flags))) {
461 result = 1;
462 goto done;
463 }
464
465 if(remote_machine) {
466 printf("Password changed for user %s on %s.\n", user_name, remote_machine );
467 } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
468 struct samu *sampass = NULL;
469
470 sampass = samu_new( NULL );
471 if (!sampass) {
472 fprintf(stderr, "talloc fail for struct samu.\n");
473 exit(1);
474 }
475
476 if (!pdb_getsampwnam(sampass, user_name)) {
477 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
478 user_name );
479 exit(1);
480 }
481
482 printf("Password changed for user %s.", user_name );
483 if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) {
484 printf(" User has disabled flag set.");
485 }
486 if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) {
487 printf(" User has no password flag set.");
488 }
489 printf("\n");
490 TALLOC_FREE(sampass);
491 }
492
493 done:
494 SAFE_FREE(old_passwd);
495 SAFE_FREE(new_passwd);
496 return result;
497 }
498
499
500 /*************************************************************
501 Handle password changing for non-root.
502 *************************************************************/
503
504 static int process_nonroot(int local_flags)
505 {
506 struct passwd *pwd = NULL;
507 int result = 0;
508 char *old_pw = NULL;
509 char *new_pw = NULL;
510
511 if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) {
512 /* Extra flags that we can't honor non-root */
513 usage();
514 }
515
516 if (!user_name[0]) {
517 pwd = getpwuid_alloc(talloc_tos(), getuid());
518 if (pwd) {
519 fstrcpy(user_name,pwd->pw_name);
520 TALLOC_FREE(pwd);
521 } else {
522 fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid());
523 exit(1);
524 }
525 }
526
527 /*
528 * A non-root user is always setting a password
529 * via a remote machine (even if that machine is
530 * localhost).
531 */
532
533 load_interfaces(); /* Delayed from main() */
534
535 if (remote_machine == NULL) {
536 remote_machine = "127.0.0.1";
537 }
538
539 if (remote_machine != NULL) {
540 old_pw = get_pass("Old SMB password:",stdin_passwd_get);
541 }
542
543 if (!new_passwd) {
544 new_pw = prompt_for_new_password(stdin_passwd_get);
545 }
546 else
547 new_pw = smb_xstrdup(new_passwd);
548
549 if (!new_pw) {
550 fprintf(stderr, "Unable to get new password.\n");
551 exit(1);
552 }
553
554 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name, old_pw,
555 new_pw, 0))) {
556 result = 1;
557 goto done;
558 }
559
560 printf("Password changed for user %s\n", user_name);
561
562 done:
563 SAFE_FREE(old_pw);
564 SAFE_FREE(new_pw);
565
566 return result;
567 }
568
569
570
571 /*********************************************************
572 Start here.
573 **********************************************************/
574 int main(int argc, char **argv)
575 {
576 TALLOC_CTX *frame = talloc_stackframe();
577 int local_flags = 0;
578 int ret;
579
580 #if defined(HAVE_SET_AUTH_PARAMETERS)
581 set_auth_parameters(argc, argv);
582 #endif /* HAVE_SET_AUTH_PARAMETERS */
583
584 if (getuid() == 0) {
585 local_flags = LOCAL_AM_ROOT;
586 }
587
588 load_case_tables();
589
590 local_flags = process_options(argc, argv, local_flags);
591
592 setup_logging("smbpasswd", DEBUG_STDERR);
593
594 /*
595 * Set the machine NETBIOS name if not already
596 * set from the config file.
597 */
598
599 if (!init_names())
600 return 1;
601
602 /* Check the effective uid - make sure we are not setuid */
603 if (is_setuid_root()) {
604 fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
605 exit(1);
606 }
607
608 if (local_flags & LOCAL_AM_ROOT) {
609 bool ok;
610
611 ok = secrets_init();
612 if (!ok) {
613 return 1;
614 }
615 ret = process_root(local_flags);
616 } else {
617 ret = process_nonroot(local_flags);
618 }
619 TALLOC_FREE(frame);
620 return ret;
621 }
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