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s4-auth: Use kerberos util functions in srv_keytab
[Samba.git] / source3 / utils / smbpasswd.c
blob437a5e551bba45cd24ddcc92ce503abba6ede6e9
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 (getuid() != 0) {
101 fprintf(stderr, "smbpasswd -L can only be used by root.\n");
102 exit(1);
103 }
104 local_flags |= LOCAL_AM_ROOT;
105 break;
106 case 'c':
107 configfile = optarg;
108 set_dyn_CONFIGFILE(optarg);
109 break;
110 case 'a':
111 local_flags |= LOCAL_ADD_USER;
112 break;
113 case 'x':
114 local_flags |= LOCAL_DELETE_USER;
115 local_flags &= ~LOCAL_SET_PASSWORD;
116 break;
117 case 'd':
118 local_flags |= LOCAL_DISABLE_USER;
119 local_flags &= ~LOCAL_SET_PASSWORD;
120 break;
121 case 'e':
122 local_flags |= LOCAL_ENABLE_USER;
123 local_flags &= ~LOCAL_SET_PASSWORD;
124 break;
125 case 'm':
126 local_flags |= LOCAL_TRUST_ACCOUNT;
127 break;
128 case 'i':
129 local_flags |= LOCAL_INTERDOM_ACCOUNT;
130 break;
131 case 'j':
132 d_printf("See 'net join' for this functionality\n");
133 exit(1);
134 break;
135 case 'n':
136 local_flags |= LOCAL_SET_NO_PASSWORD;
137 local_flags &= ~LOCAL_SET_PASSWORD;
138 SAFE_FREE(new_passwd);
139 new_passwd = smb_xstrdup("NO PASSWORD");
140 break;
141 case 'r':
142 remote_machine = optarg;
143 break;
144 case 's':
145 set_line_buffering(stdin);
146 set_line_buffering(stdout);
147 set_line_buffering(stderr);
148 stdin_passwd_get = True;
149 break;
150 case 'w':
151 local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
152 fstrcpy(ldap_secret, optarg);
153 break;
154 case 'R':
155 lp_set_cmdline("name resolve order", optarg);
156 break;
157 case 'D':
158 lp_set_cmdline("log level", optarg);
159 break;
160 case 'U': {
161 got_username = True;
162 fstrcpy(user_name, optarg);
163 break;
164 case 'W':
165 local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
166 *ldap_secret = '\0';
167 break;
168 }
169 case 'h':
170 default:
171 usage();
172 }
173 }
174
175 argc -= optind;
176 argv += optind;
177
178 switch(argc) {
179 case 0:
180 if (!got_username)
181 fstrcpy(user_name, "");
182 break;
183 case 1:
184 if (!(local_flags & LOCAL_AM_ROOT)) {
185 usage();
186 } else {
187 if (got_username) {
188 usage();
189 } else {
190 fstrcpy(user_name, argv[0]);
191 }
192 }
193 break;
194 default:
195 usage();
196 }
197
198 if (!lp_load_global(configfile)) {
199 fprintf(stderr, "Can't load %s - run testparm to debug it\n",
200 configfile);
201 exit(1);
202 }
203
204 return local_flags;
205 }
206
207 /*************************************************************
208 Utility function to prompt for new password.
209 *************************************************************/
210 static char *prompt_for_new_password(bool stdin_get)
211 {
212 char *p;
213 fstring new_pw;
214
215 ZERO_ARRAY(new_pw);
216
217 p = get_pass("New SMB password:", stdin_get);
218 if (p == NULL) {
219 return NULL;
220 }
221
222 fstrcpy(new_pw, p);
223 SAFE_FREE(p);
224
225 p = get_pass("Retype new SMB password:", stdin_get);
226 if (p == NULL) {
227 return NULL;
228 }
229
230 if (strcmp(p, new_pw)) {
231 fprintf(stderr, "Mismatch - password unchanged.\n");
232 ZERO_ARRAY(new_pw);
233 SAFE_FREE(p);
234 return NULL;
235 }
236
237 return p;
238 }
239
240
241 /*************************************************************
242 Change a password either locally or remotely.
243 *************************************************************/
244
245 static NTSTATUS password_change(const char *remote_mach, char *username,
246 char *old_passwd, char *new_pw,
247 int local_flags)
248 {
249 NTSTATUS ret;
250 char *err_str = NULL;
251 char *msg_str = NULL;
252
253 if (remote_mach != NULL) {
254 if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|
255 LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
256 LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
257 /* these things can't be done remotely yet */
258 fprintf(stderr, "Invalid remote operation!\n");
259 return NT_STATUS_UNSUCCESSFUL;
260 }
261 ret = remote_password_change(remote_mach, username,
262 old_passwd, new_pw, &err_str);
263 } else {
264 ret = local_password_change(username, local_flags, new_pw,
265 &err_str, &msg_str);
266 }
267
268 if (msg_str) {
269 printf("%s", msg_str);
270 }
271 if (err_str) {
272 fprintf(stderr, "%s", err_str);
273 }
274 if (!NT_STATUS_IS_OK(ret) && !err_str) {
275 fprintf(stderr, "Failed to change password!\n");
276 }
277
278 SAFE_FREE(msg_str);
279 SAFE_FREE(err_str);
280 return ret;
281 }
282
283 /*******************************************************************
284 Store the LDAP admin password in secrets.tdb
285 ******************************************************************/
286 static bool store_ldap_admin_pw (char* pw)
287 {
288 if (!pw)
289 return False;
290
291 if (!secrets_init())
292 return False;
293
294 return secrets_store_ldap_pw(lp_ldap_admin_dn(talloc_tos()), pw);
295 }
296
297
298 /*************************************************************
299 Handle password changing for root.
300 *************************************************************/
301
302 static int process_root(int local_flags)
303 {
304 struct passwd *pwd;
305 int result = 0;
306 char *old_passwd = NULL;
307
308 if (local_flags & LOCAL_SET_LDAP_ADMIN_PW) {
309 char *ldap_admin_dn = lp_ldap_admin_dn(talloc_tos());
310 if ( ! *ldap_admin_dn ) {
311 DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n"));
312 goto done;
313 }
314
315 printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn);
316 if ( ! *ldap_secret ) {
317 new_passwd = prompt_for_new_password(stdin_passwd_get);
318 if (new_passwd == NULL) {
319 fprintf(stderr, "Failed to read new password!\n");
320 exit(1);
321 }
322 fstrcpy(ldap_secret, new_passwd);
323 }
324 if (!store_ldap_admin_pw(ldap_secret)) {
325 DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
326 }
327 goto done;
328 }
329
330 /* Ensure passdb startup(). */
331 if(!initialize_password_db(False, NULL)) {
332 DEBUG(0, ("Failed to open passdb!\n"));
333 exit(1);
334 }
335
336 /* Ensure we have a SAM sid. */
337 get_global_sam_sid();
338
339 /*
340 * Ensure both add/delete user are not set
341 * Ensure add/delete user and either remote machine or join domain are
342 * not both set.
343 */
344 if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
345 ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
346 (remote_machine != NULL))) {
347 usage();
348 }
349
350 /* Only load interfaces if we are doing network operations. */
351
352 if (remote_machine) {
353 load_interfaces();
354 }
355
356 if (!user_name[0] && (pwd = getpwuid_alloc(talloc_tos(), geteuid()))) {
357 fstrcpy(user_name, pwd->pw_name);
358 TALLOC_FREE(pwd);
359 }
360
361 if (!user_name[0]) {
362 fprintf(stderr,"You must specify a username\n");
363 exit(1);
364 }
365
366 if (local_flags & LOCAL_TRUST_ACCOUNT) {
367 /* add the $ automatically */
368 static fstring buf;
369
370 /*
371 * Remove any trailing '$' before we
372 * generate the initial machine password.
373 */
374
375 if (user_name[strlen(user_name)-1] == '$') {
376 user_name[strlen(user_name)-1] = 0;
377 }
378
379 if (local_flags & LOCAL_ADD_USER) {
380 SAFE_FREE(new_passwd);
381 new_passwd = smb_xstrdup(user_name);
382 if (!strlower_m(new_passwd)) {
383 fprintf(stderr, "strlower_m %s failed\n",
384 new_passwd);
385 exit(1);
386 }
387 }
388
389 /*
390 * Now ensure the username ends in '$' for
391 * the machine add.
392 */
393
394 slprintf(buf, sizeof(buf)-1, "%s$", user_name);
395 strlcpy(user_name, buf, sizeof(user_name));
396 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
397 static fstring buf;
398
399 if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) {
400 /*
401 * Prompt for trusting domain's account password
402 */
403 new_passwd = prompt_for_new_password(stdin_passwd_get);
404 if(!new_passwd) {
405 fprintf(stderr, "Unable to get newpassword.\n");
406 exit(1);
407 }
408 }
409
410 /* prepare uppercased and '$' terminated username */
411 slprintf(buf, sizeof(buf) - 1, "%s$", user_name);
412 strlcpy(user_name, buf, sizeof(user_name));
413
414 } else {
415
416 if (remote_machine != NULL) {
417 old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
418 if(!old_passwd) {
419 fprintf(stderr, "Unable to get old password.\n");
420 exit(1);
421 }
422 }
423
424 if (!(local_flags & LOCAL_SET_PASSWORD)) {
425
426 /*
427 * If we are trying to enable a user, first we need to find out
428 * if they are using a modern version of the smbpasswd file that
429 * disables a user by just writing a flag into the file. If so
430 * then we can re-enable a user without prompting for a new
431 * password. If not (ie. they have a no stored password in the
432 * smbpasswd file) then we need to prompt for a new password.
433 */
434
435 if(local_flags & LOCAL_ENABLE_USER) {
436 struct samu *sampass = NULL;
437
438 sampass = samu_new( NULL );
439 if (!sampass) {
440 fprintf(stderr, "talloc fail for struct samu.\n");
441 exit(1);
442 }
443 if (!pdb_getsampwnam(sampass, user_name)) {
444 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
445 user_name );
446 exit(1);
447 }
448
449 if(pdb_get_nt_passwd(sampass) == NULL) {
450 local_flags |= LOCAL_SET_PASSWORD;
451 }
452 TALLOC_FREE(sampass);
453 }
454 }
455
456 if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) {
457
458 new_passwd = prompt_for_new_password(stdin_passwd_get);
459 if(!new_passwd) {
460 fprintf(stderr, "Unable to get new password.\n");
461 exit(1);
462 }
463 }
464 }
465
466 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name,
467 old_passwd, new_passwd,
468 local_flags))) {
469 result = 1;
470 goto done;
471 }
472
473 if(remote_machine) {
474 printf("Password changed for user %s on %s.\n", user_name, remote_machine );
475 } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
476 struct samu *sampass = NULL;
477
478 sampass = samu_new( NULL );
479 if (!sampass) {
480 fprintf(stderr, "talloc fail for struct samu.\n");
481 exit(1);
482 }
483
484 if (!pdb_getsampwnam(sampass, user_name)) {
485 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
486 user_name );
487 exit(1);
488 }
489
490 printf("Password changed for user %s.", user_name );
491 if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) {
492 printf(" User has disabled flag set.");
493 }
494 if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) {
495 printf(" User has no password flag set.");
496 }
497 printf("\n");
498 TALLOC_FREE(sampass);
499 }
500
501 done:
502 SAFE_FREE(old_passwd);
503 SAFE_FREE(new_passwd);
504 return result;
505 }
506
507
508 /*************************************************************
509 Handle password changing for non-root.
510 *************************************************************/
511
512 static int process_nonroot(int local_flags)
513 {
514 struct passwd *pwd = NULL;
515 int result = 0;
516 char *old_pw = NULL;
517 char *new_pw = NULL;
518
519 if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) {
520 /* Extra flags that we can't honor non-root */
521 usage();
522 }
523
524 if (!user_name[0]) {
525 pwd = getpwuid_alloc(talloc_tos(), getuid());
526 if (pwd) {
527 fstrcpy(user_name,pwd->pw_name);
528 TALLOC_FREE(pwd);
529 } else {
530 fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid());
531 exit(1);
532 }
533 }
534
535 /*
536 * A non-root user is always setting a password
537 * via a remote machine (even if that machine is
538 * localhost).
539 */
540
541 load_interfaces(); /* Delayed from main() */
542
543 if (remote_machine == NULL) {
544 remote_machine = "127.0.0.1";
545 }
546
547 if (remote_machine != NULL) {
548 old_pw = get_pass("Old SMB password:",stdin_passwd_get);
549 if (old_pw == NULL) {
550 fprintf(stderr, "Unable to get old password.\n");
551 exit(1);
552 }
553 }
554
555 if (!new_passwd) {
556 new_pw = prompt_for_new_password(stdin_passwd_get);
557 }
558 else
559 new_pw = smb_xstrdup(new_passwd);
560
561 if (!new_pw) {
562 fprintf(stderr, "Unable to get new password.\n");
563 exit(1);
564 }
565
566 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name, old_pw,
567 new_pw, 0))) {
568 result = 1;
569 goto done;
570 }
571
572 printf("Password changed for user %s\n", user_name);
573
574 done:
575 SAFE_FREE(old_pw);
576 SAFE_FREE(new_pw);
577
578 return result;
579 }
580
581
582
583 /*********************************************************
584 Start here.
585 **********************************************************/
586 int main(int argc, char **argv)
587 {
588 TALLOC_CTX *frame = talloc_stackframe();
589 int local_flags = 0;
590 int ret;
591
592 #if defined(HAVE_SET_AUTH_PARAMETERS)
593 set_auth_parameters(argc, argv);
594 #endif /* HAVE_SET_AUTH_PARAMETERS */
595
596 if (getuid() == 0) {
597 local_flags = LOCAL_AM_ROOT;
598 }
599
600 smb_init_locale();
601
602 local_flags = process_options(argc, argv, local_flags);
603
604 setup_logging("smbpasswd", DEBUG_STDERR);
605
606 /*
607 * Set the machine NETBIOS name if not already
608 * set from the config file.
609 */
610
611 if (!init_names())
612 return 1;
613
614 /* Check the effective uid - make sure we are not setuid */
615 if (is_setuid_root()) {
616 fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
617 exit(1);
618 }
619
620 if (local_flags & LOCAL_AM_ROOT) {
621 bool ok;
622
623 ok = secrets_init();
624 if (!ok) {
625 return 1;
626 }
627 ret = process_root(local_flags);
628 } else {
629 ret = process_nonroot(local_flags);
630 }
631 TALLOC_FREE(frame);
632 return ret;
633 }
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