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docs-xml: update 'winbind sealed pipes' description
[Samba/wip.git] / source3 / utils / smbpasswd.c
blob67780ff7cd6b6ff55fbd0a8dce2717367ff00d0f
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 if (p == NULL) {
221 return NULL;
222 }
223
224 fstrcpy(new_pw, p);
225 SAFE_FREE(p);
226
227 p = get_pass("Retype new SMB password:", stdin_get);
228 if (p == NULL) {
229 return NULL;
230 }
231
232 if (strcmp(p, new_pw)) {
233 fprintf(stderr, "Mismatch - password unchanged.\n");
234 ZERO_ARRAY(new_pw);
235 SAFE_FREE(p);
236 return NULL;
237 }
238
239 return p;
240 }
241
242
243 /*************************************************************
244 Change a password either locally or remotely.
245 *************************************************************/
246
247 static NTSTATUS password_change(const char *remote_mach, char *username,
248 char *old_passwd, char *new_pw,
249 int local_flags)
250 {
251 NTSTATUS ret;
252 char *err_str = NULL;
253 char *msg_str = NULL;
254
255 if (remote_mach != NULL) {
256 if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|
257 LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
258 LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
259 /* these things can't be done remotely yet */
260 fprintf(stderr, "Invalid remote operation!\n");
261 return NT_STATUS_UNSUCCESSFUL;
262 }
263 ret = remote_password_change(remote_mach, username,
264 old_passwd, new_pw, &err_str);
265 } else {
266 ret = local_password_change(username, local_flags, new_pw,
267 &err_str, &msg_str);
268 }
269
270 if (msg_str) {
271 printf("%s", msg_str);
272 }
273 if (err_str) {
274 fprintf(stderr, "%s", err_str);
275 }
276 if (!NT_STATUS_IS_OK(ret) && !err_str) {
277 fprintf(stderr, "Failed to change password!\n");
278 }
279
280 SAFE_FREE(msg_str);
281 SAFE_FREE(err_str);
282 return ret;
283 }
284
285 /*******************************************************************
286 Store the LDAP admin password in secrets.tdb
287 ******************************************************************/
288 static bool store_ldap_admin_pw (char* pw)
289 {
290 if (!pw)
291 return False;
292
293 if (!secrets_init())
294 return False;
295
296 return secrets_store_ldap_pw(lp_ldap_admin_dn(talloc_tos()), pw);
297 }
298
299
300 /*************************************************************
301 Handle password changing for root.
302 *************************************************************/
303
304 static int process_root(int local_flags)
305 {
306 struct passwd *pwd;
307 int result = 0;
308 char *old_passwd = NULL;
309
310 if (local_flags & LOCAL_SET_LDAP_ADMIN_PW) {
311 char *ldap_admin_dn = lp_ldap_admin_dn(talloc_tos());
312 if ( ! *ldap_admin_dn ) {
313 DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n"));
314 goto done;
315 }
316
317 printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn);
318 if ( ! *ldap_secret ) {
319 new_passwd = prompt_for_new_password(stdin_passwd_get);
320 if (new_passwd == NULL) {
321 fprintf(stderr, "Failed to read new password!\n");
322 exit(1);
323 }
324 fstrcpy(ldap_secret, new_passwd);
325 }
326 if (!store_ldap_admin_pw(ldap_secret)) {
327 DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
328 }
329 goto done;
330 }
331
332 /* Ensure passdb startup(). */
333 if(!initialize_password_db(False, NULL)) {
334 DEBUG(0, ("Failed to open passdb!\n"));
335 exit(1);
336 }
337
338 /* Ensure we have a SAM sid. */
339 get_global_sam_sid();
340
341 /*
342 * Ensure both add/delete user are not set
343 * Ensure add/delete user and either remote machine or join domain are
344 * not both set.
345 */
346 if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
347 ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
348 (remote_machine != NULL))) {
349 usage();
350 }
351
352 /* Only load interfaces if we are doing network operations. */
353
354 if (remote_machine) {
355 load_interfaces();
356 }
357
358 if (!user_name[0] && (pwd = getpwuid_alloc(talloc_tos(), geteuid()))) {
359 fstrcpy(user_name, pwd->pw_name);
360 TALLOC_FREE(pwd);
361 }
362
363 if (!user_name[0]) {
364 fprintf(stderr,"You must specify a username\n");
365 exit(1);
366 }
367
368 if (local_flags & LOCAL_TRUST_ACCOUNT) {
369 /* add the $ automatically */
370 static fstring buf;
371
372 /*
373 * Remove any trailing '$' before we
374 * generate the initial machine password.
375 */
376
377 if (user_name[strlen(user_name)-1] == '$') {
378 user_name[strlen(user_name)-1] = 0;
379 }
380
381 if (local_flags & LOCAL_ADD_USER) {
382 SAFE_FREE(new_passwd);
383 new_passwd = smb_xstrdup(user_name);
384 if (!strlower_m(new_passwd)) {
385 fprintf(stderr, "strlower_m %s failed\n",
386 new_passwd);
387 exit(1);
388 }
389 }
390
391 /*
392 * Now ensure the username ends in '$' for
393 * the machine add.
394 */
395
396 slprintf(buf, sizeof(buf)-1, "%s$", user_name);
397 strlcpy(user_name, buf, sizeof(user_name));
398 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
399 static fstring buf;
400
401 if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) {
402 /*
403 * Prompt for trusting domain's account password
404 */
405 new_passwd = prompt_for_new_password(stdin_passwd_get);
406 if(!new_passwd) {
407 fprintf(stderr, "Unable to get newpassword.\n");
408 exit(1);
409 }
410 }
411
412 /* prepare uppercased and '$' terminated username */
413 slprintf(buf, sizeof(buf) - 1, "%s$", user_name);
414 strlcpy(user_name, buf, sizeof(user_name));
415
416 } else {
417
418 if (remote_machine != NULL) {
419 old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
420 if(!old_passwd) {
421 fprintf(stderr, "Unable to get old password.\n");
422 exit(1);
423 }
424 }
425
426 if (!(local_flags & LOCAL_SET_PASSWORD)) {
427
428 /*
429 * If we are trying to enable a user, first we need to find out
430 * if they are using a modern version of the smbpasswd file that
431 * disables a user by just writing a flag into the file. If so
432 * then we can re-enable a user without prompting for a new
433 * password. If not (ie. they have a no stored password in the
434 * smbpasswd file) then we need to prompt for a new password.
435 */
436
437 if(local_flags & LOCAL_ENABLE_USER) {
438 struct samu *sampass = NULL;
439
440 sampass = samu_new( NULL );
441 if (!sampass) {
442 fprintf(stderr, "talloc fail for struct samu.\n");
443 exit(1);
444 }
445 if (!pdb_getsampwnam(sampass, user_name)) {
446 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
447 user_name );
448 exit(1);
449 }
450
451 if(pdb_get_nt_passwd(sampass) == NULL) {
452 local_flags |= LOCAL_SET_PASSWORD;
453 }
454 TALLOC_FREE(sampass);
455 }
456 }
457
458 if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) {
459
460 new_passwd = prompt_for_new_password(stdin_passwd_get);
461 if(!new_passwd) {
462 fprintf(stderr, "Unable to get new password.\n");
463 exit(1);
464 }
465 }
466 }
467
468 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name,
469 old_passwd, new_passwd,
470 local_flags))) {
471 result = 1;
472 goto done;
473 }
474
475 if(remote_machine) {
476 printf("Password changed for user %s on %s.\n", user_name, remote_machine );
477 } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
478 struct samu *sampass = NULL;
479
480 sampass = samu_new( NULL );
481 if (!sampass) {
482 fprintf(stderr, "talloc fail for struct samu.\n");
483 exit(1);
484 }
485
486 if (!pdb_getsampwnam(sampass, user_name)) {
487 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
488 user_name );
489 exit(1);
490 }
491
492 printf("Password changed for user %s.", user_name );
493 if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) {
494 printf(" User has disabled flag set.");
495 }
496 if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) {
497 printf(" User has no password flag set.");
498 }
499 printf("\n");
500 TALLOC_FREE(sampass);
501 }
502
503 done:
504 SAFE_FREE(old_passwd);
505 SAFE_FREE(new_passwd);
506 return result;
507 }
508
509
510 /*************************************************************
511 Handle password changing for non-root.
512 *************************************************************/
513
514 static int process_nonroot(int local_flags)
515 {
516 struct passwd *pwd = NULL;
517 int result = 0;
518 char *old_pw = NULL;
519 char *new_pw = NULL;
520
521 if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) {
522 /* Extra flags that we can't honor non-root */
523 usage();
524 }
525
526 if (!user_name[0]) {
527 pwd = getpwuid_alloc(talloc_tos(), getuid());
528 if (pwd) {
529 fstrcpy(user_name,pwd->pw_name);
530 TALLOC_FREE(pwd);
531 } else {
532 fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid());
533 exit(1);
534 }
535 }
536
537 /*
538 * A non-root user is always setting a password
539 * via a remote machine (even if that machine is
540 * localhost).
541 */
542
543 load_interfaces(); /* Delayed from main() */
544
545 if (remote_machine == NULL) {
546 remote_machine = "127.0.0.1";
547 }
548
549 if (remote_machine != NULL) {
550 old_pw = get_pass("Old SMB password:",stdin_passwd_get);
551 if (old_pw == NULL) {
552 fprintf(stderr, "Unable to get old password.\n");
553 exit(1);
554 }
555 }
556
557 if (!new_passwd) {
558 new_pw = prompt_for_new_password(stdin_passwd_get);
559 }
560 else
561 new_pw = smb_xstrdup(new_passwd);
562
563 if (!new_pw) {
564 fprintf(stderr, "Unable to get new password.\n");
565 exit(1);
566 }
567
568 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name, old_pw,
569 new_pw, 0))) {
570 result = 1;
571 goto done;
572 }
573
574 printf("Password changed for user %s\n", user_name);
575
576 done:
577 SAFE_FREE(old_pw);
578 SAFE_FREE(new_pw);
579
580 return result;
581 }
582
583
584
585 /*********************************************************
586 Start here.
587 **********************************************************/
588 int main(int argc, char **argv)
589 {
590 TALLOC_CTX *frame = talloc_stackframe();
591 int local_flags = 0;
592 int ret;
593
594 #if defined(HAVE_SET_AUTH_PARAMETERS)
595 set_auth_parameters(argc, argv);
596 #endif /* HAVE_SET_AUTH_PARAMETERS */
597
598 if (getuid() == 0) {
599 local_flags = LOCAL_AM_ROOT;
600 }
601
602 load_case_tables();
603
604 local_flags = process_options(argc, argv, local_flags);
605
606 setup_logging("smbpasswd", DEBUG_STDERR);
607
608 /*
609 * Set the machine NETBIOS name if not already
610 * set from the config file.
611 */
612
613 if (!init_names())
614 return 1;
615
616 /* Check the effective uid - make sure we are not setuid */
617 if (is_setuid_root()) {
618 fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
619 exit(1);
620 }
621
622 if (local_flags & LOCAL_AM_ROOT) {
623 bool ok;
624
625 ok = secrets_init();
626 if (!ok) {
627 return 1;
628 }
629 ret = process_root(local_flags);
630 } else {
631 ret = process_nonroot(local_flags);
632 }
633 TALLOC_FREE(frame);
634 return ret;
635 }
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