Line data Source code
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 "libsmb/proto.h"
25 : #include "passdb.h"
26 : #include "cmdline_contexts.h"
27 : #include "passwd_proto.h"
28 : #include "lib/util/string_wrappers.h"
29 :
30 : /*
31 : * Next two lines needed for SunOS and don't
32 : * hurt anything else...
33 : */
34 : extern char *optarg;
35 : extern int optind;
36 :
37 : /* forced running in root-mode */
38 : static bool got_username = False;
39 : static bool stdin_passwd_get = False;
40 : static fstring user_name;
41 : static char *new_passwd = NULL;
42 : static const char *remote_machine = NULL;
43 :
44 : static fstring ldap_secret;
45 :
46 :
47 : /*********************************************************
48 : Print command usage on stderr and die.
49 : **********************************************************/
50 0 : static void usage(void)
51 : {
52 0 : printf("When run by root:\n");
53 0 : printf(" smbpasswd [options] [username]\n");
54 0 : printf("otherwise:\n");
55 0 : printf(" smbpasswd [options]\n\n");
56 :
57 0 : printf("options:\n");
58 0 : printf(" -L local mode (must be first option)\n");
59 0 : printf(" -h print this usage message\n");
60 0 : printf(" -s use stdin for password prompt\n");
61 0 : printf(" -c smb.conf file Use the given path to the smb.conf file\n");
62 0 : printf(" -D LEVEL debug level\n");
63 0 : printf(" -r MACHINE remote machine\n");
64 0 : printf(" -U USER remote username (e.g. SAM/user)\n");
65 :
66 0 : printf("extra options when run by root or in local mode:\n");
67 0 : printf(" -a add user\n");
68 0 : printf(" -d disable user\n");
69 0 : printf(" -e enable user\n");
70 0 : printf(" -i interdomain trust account\n");
71 0 : printf(" -m machine trust account\n");
72 0 : printf(" -n set no password\n");
73 0 : printf(" -W use stdin ldap admin password\n");
74 0 : printf(" -w PASSWORD ldap admin password\n");
75 0 : printf(" -x delete user\n");
76 0 : printf(" -R ORDER name resolve order\n");
77 :
78 0 : exit(1);
79 : }
80 :
81 870 : static void set_line_buffering(FILE *f)
82 : {
83 870 : setvbuf(f, NULL, _IOLBF, 0);
84 870 : }
85 :
86 : /*******************************************************************
87 : Process command line options
88 : ******************************************************************/
89 :
90 299 : static int process_options(int argc, char **argv, int local_flags)
91 : {
92 : int ch;
93 299 : const char *configfile = get_dyn_CONFIGFILE();
94 :
95 299 : local_flags |= LOCAL_SET_PASSWORD;
96 :
97 299 : ZERO_STRUCT(user_name);
98 :
99 299 : user_name[0] = '\0';
100 :
101 1664 : while ((ch = getopt(argc, argv, "c:axdehminjr:sw:R:D:U:LWS:")) != EOF) {
102 1179 : switch(ch) {
103 292 : case 'L':
104 292 : if (getuid() != 0) {
105 0 : fprintf(stderr, "smbpasswd -L can only be used by root.\n");
106 0 : exit(1);
107 : }
108 292 : local_flags |= LOCAL_AM_ROOT;
109 292 : break;
110 299 : case 'c':
111 299 : configfile = optarg;
112 299 : set_dyn_CONFIGFILE(optarg);
113 299 : break;
114 292 : case 'a':
115 292 : local_flags |= LOCAL_ADD_USER;
116 292 : break;
117 2 : case 'x':
118 2 : local_flags |= LOCAL_DELETE_USER;
119 2 : local_flags &= ~LOCAL_SET_PASSWORD;
120 2 : break;
121 0 : case 'd':
122 0 : local_flags |= LOCAL_DISABLE_USER;
123 0 : local_flags &= ~LOCAL_SET_PASSWORD;
124 0 : break;
125 0 : case 'e':
126 0 : local_flags |= LOCAL_ENABLE_USER;
127 0 : local_flags &= ~LOCAL_SET_PASSWORD;
128 0 : break;
129 0 : case 'm':
130 0 : local_flags |= LOCAL_TRUST_ACCOUNT;
131 0 : break;
132 0 : case 'i':
133 0 : local_flags |= LOCAL_INTERDOM_ACCOUNT;
134 0 : break;
135 0 : case 'j':
136 0 : d_printf("See 'net join' for this functionality\n");
137 0 : exit(1);
138 : break;
139 0 : case 'n':
140 0 : local_flags |= LOCAL_SET_NO_PASSWORD;
141 0 : local_flags &= ~LOCAL_SET_PASSWORD;
142 0 : SAFE_FREE(new_passwd);
143 0 : new_passwd = smb_xstrdup("NO PASSWORD");
144 0 : break;
145 3 : case 'r':
146 3 : remote_machine = optarg;
147 3 : break;
148 290 : case 's':
149 290 : set_line_buffering(stdin);
150 290 : set_line_buffering(stdout);
151 290 : set_line_buffering(stderr);
152 290 : stdin_passwd_get = True;
153 290 : break;
154 0 : case 'w':
155 0 : local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
156 0 : fstrcpy(ldap_secret, optarg);
157 0 : break;
158 0 : case 'R':
159 0 : lp_set_cmdline("name resolve order", optarg);
160 0 : break;
161 0 : case 'D':
162 0 : lp_set_cmdline("log level", optarg);
163 0 : break;
164 1 : case 'U': {
165 1 : got_username = True;
166 1 : fstrcpy(user_name, optarg);
167 1 : break;
168 0 : case 'W':
169 0 : local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
170 0 : *ldap_secret = '\0';
171 0 : break;
172 : }
173 0 : case 'h':
174 : default:
175 0 : usage();
176 : }
177 : }
178 :
179 299 : argc -= optind;
180 299 : argv += optind;
181 :
182 299 : switch(argc) {
183 3 : case 0:
184 3 : if (!got_username)
185 2 : fstrcpy(user_name, "");
186 3 : break;
187 296 : case 1:
188 296 : if (!(local_flags & LOCAL_AM_ROOT)) {
189 0 : usage();
190 : } else {
191 296 : if (got_username) {
192 0 : usage();
193 : } else {
194 296 : fstrcpy(user_name, argv[0]);
195 : }
196 : }
197 296 : break;
198 0 : default:
199 0 : usage();
200 : }
201 :
202 299 : if (!lp_load_global(configfile)) {
203 0 : fprintf(stderr, "Can't load %s - run testparm to debug it\n",
204 : configfile);
205 0 : exit(1);
206 : }
207 :
208 299 : return local_flags;
209 : }
210 :
211 : /*************************************************************
212 : Utility function to prompt for new password.
213 : *************************************************************/
214 297 : static char *prompt_for_new_password(bool stdin_get)
215 : {
216 : char *p;
217 : fstring new_pw;
218 :
219 297 : ZERO_ARRAY(new_pw);
220 :
221 297 : p = get_pass("New SMB password:", stdin_get);
222 297 : if (p == NULL) {
223 0 : return NULL;
224 : }
225 :
226 297 : fstrcpy(new_pw, p);
227 297 : SAFE_FREE(p);
228 :
229 297 : p = get_pass("Retype new SMB password:", stdin_get);
230 297 : if (p == NULL) {
231 0 : return NULL;
232 : }
233 :
234 297 : if (strcmp(p, new_pw)) {
235 0 : fprintf(stderr, "Mismatch - password unchanged.\n");
236 0 : ZERO_ARRAY(new_pw);
237 0 : SAFE_FREE(p);
238 0 : return NULL;
239 : }
240 :
241 297 : return p;
242 : }
243 :
244 :
245 : /*************************************************************
246 : Change a password either locally or remotely.
247 : *************************************************************/
248 :
249 299 : static NTSTATUS password_change(const char *remote_mach,
250 : const char *domain, const char *username,
251 : const char *old_passwd, const char *new_pw,
252 : int local_flags)
253 : {
254 : NTSTATUS ret;
255 299 : char *err_str = NULL;
256 299 : char *msg_str = NULL;
257 :
258 299 : if (remote_mach != NULL) {
259 3 : if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|
260 : LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
261 : LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
262 : /* these things can't be done remotely yet */
263 0 : fprintf(stderr, "Invalid remote operation!\n");
264 0 : return NT_STATUS_UNSUCCESSFUL;
265 : }
266 3 : ret = remote_password_change(remote_mach,
267 : domain, username,
268 : old_passwd, new_pw, &err_str);
269 : } else {
270 296 : ret = local_password_change(username, local_flags, new_pw,
271 : &err_str, &msg_str);
272 : }
273 :
274 299 : if (msg_str) {
275 294 : printf("%s", msg_str);
276 : }
277 299 : if (err_str) {
278 0 : fprintf(stderr, "%s", err_str);
279 : }
280 299 : if (!NT_STATUS_IS_OK(ret) && !err_str) {
281 0 : fprintf(stderr, "Failed to change password!\n");
282 : }
283 :
284 299 : SAFE_FREE(msg_str);
285 299 : SAFE_FREE(err_str);
286 299 : return ret;
287 : }
288 :
289 : /*******************************************************************
290 : Store the LDAP admin password in secrets.tdb
291 : ******************************************************************/
292 0 : static bool store_ldap_admin_pw (char* pw)
293 : {
294 0 : if (!pw)
295 0 : return False;
296 :
297 0 : if (!secrets_init())
298 0 : return False;
299 :
300 0 : return secrets_store_ldap_pw(lp_ldap_admin_dn(), pw);
301 : }
302 :
303 :
304 : /*************************************************************
305 : Handle password changing for root.
306 : *************************************************************/
307 :
308 297 : static int process_root(int local_flags)
309 : {
310 : struct passwd *pwd;
311 297 : int result = 0;
312 297 : char *old_passwd = NULL;
313 :
314 297 : if (local_flags & LOCAL_SET_LDAP_ADMIN_PW) {
315 0 : const char *ldap_admin_dn = lp_ldap_admin_dn();
316 0 : if ( ! *ldap_admin_dn ) {
317 0 : DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n"));
318 0 : goto done;
319 : }
320 :
321 0 : printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn);
322 0 : if ( ! *ldap_secret ) {
323 0 : new_passwd = prompt_for_new_password(stdin_passwd_get);
324 0 : if (new_passwd == NULL) {
325 0 : fprintf(stderr, "Failed to read new password!\n");
326 0 : exit(1);
327 : }
328 0 : fstrcpy(ldap_secret, new_passwd);
329 : }
330 0 : if (!store_ldap_admin_pw(ldap_secret)) {
331 0 : DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
332 : }
333 0 : goto done;
334 : }
335 :
336 : /* Ensure passdb startup(). */
337 297 : if(!initialize_password_db(False, NULL)) {
338 0 : DEBUG(0, ("Failed to open passdb!\n"));
339 0 : exit(1);
340 : }
341 :
342 : /* Ensure we have a SAM sid. */
343 297 : get_global_sam_sid();
344 :
345 : /*
346 : * Ensure both add/delete user are not set
347 : * Ensure add/delete user and either remote machine or join domain are
348 : * not both set.
349 : */
350 482 : if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
351 479 : ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
352 294 : (remote_machine != NULL))) {
353 0 : usage();
354 : }
355 :
356 : /* Only load interfaces if we are doing network operations. */
357 :
358 297 : if (remote_machine) {
359 1 : load_interfaces();
360 : }
361 :
362 297 : if (!user_name[0] && (pwd = getpwuid_alloc(talloc_tos(), geteuid()))) {
363 0 : fstrcpy(user_name, pwd->pw_name);
364 0 : TALLOC_FREE(pwd);
365 : }
366 :
367 297 : if (!user_name[0]) {
368 0 : fprintf(stderr,"You must specify a username\n");
369 0 : exit(1);
370 : }
371 :
372 297 : if (local_flags & LOCAL_TRUST_ACCOUNT) {
373 : /* add the $ automatically */
374 0 : size_t user_name_len = strlen(user_name);
375 :
376 0 : if (user_name[user_name_len - 1] == '$') {
377 0 : user_name_len--;
378 : } else {
379 0 : if (user_name_len + 2 > sizeof(user_name)) {
380 0 : fprintf(stderr, "machine name too long\n");
381 0 : exit(1);
382 : }
383 0 : user_name[user_name_len] = '$';
384 0 : user_name[user_name_len + 1] = '\0';
385 : }
386 :
387 0 : if (local_flags & LOCAL_ADD_USER) {
388 0 : SAFE_FREE(new_passwd);
389 :
390 : /*
391 : * Remove any trailing '$' before we
392 : * generate the initial machine password.
393 : */
394 0 : new_passwd = smb_xstrndup(user_name, user_name_len);
395 0 : if (!strlower_m(new_passwd)) {
396 0 : fprintf(stderr, "strlower_m %s failed\n",
397 : new_passwd);
398 0 : exit(1);
399 : }
400 : }
401 297 : } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
402 0 : size_t user_name_len = strlen(user_name);
403 :
404 0 : if (user_name[user_name_len - 1] != '$') {
405 0 : if (user_name_len + 2 > sizeof(user_name)) {
406 0 : fprintf(stderr, "machine name too long\n");
407 0 : exit(1);
408 : }
409 0 : user_name[user_name_len] = '$';
410 0 : user_name[user_name_len + 1] = '\0';
411 : }
412 :
413 0 : if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) {
414 : /*
415 : * Prompt for trusting domain's account password
416 : */
417 0 : new_passwd = prompt_for_new_password(stdin_passwd_get);
418 0 : if(!new_passwd) {
419 0 : fprintf(stderr, "Unable to get newpassword.\n");
420 0 : exit(1);
421 : }
422 : }
423 : } else {
424 :
425 297 : if (remote_machine != NULL) {
426 1 : old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
427 1 : if(!old_passwd) {
428 0 : fprintf(stderr, "Unable to get old password.\n");
429 0 : exit(1);
430 : }
431 : }
432 :
433 297 : if (!(local_flags & LOCAL_SET_PASSWORD)) {
434 :
435 : /*
436 : * If we are trying to enable a user, first we need to find out
437 : * if they are using a modern version of the smbpasswd file that
438 : * disables a user by just writing a flag into the file. If so
439 : * then we can re-enable a user without prompting for a new
440 : * password. If not (ie. they have a no stored password in the
441 : * smbpasswd file) then we need to prompt for a new password.
442 : */
443 :
444 2 : if(local_flags & LOCAL_ENABLE_USER) {
445 0 : struct samu *sampass = NULL;
446 :
447 0 : sampass = samu_new( NULL );
448 0 : if (!sampass) {
449 0 : fprintf(stderr, "talloc fail for struct samu.\n");
450 0 : exit(1);
451 : }
452 0 : if (!pdb_getsampwnam(sampass, user_name)) {
453 0 : fprintf(stderr, "Failed to find user %s in passdb backend.\n",
454 : user_name );
455 0 : exit(1);
456 : }
457 :
458 0 : if(pdb_get_nt_passwd(sampass) == NULL) {
459 0 : local_flags |= LOCAL_SET_PASSWORD;
460 : }
461 0 : TALLOC_FREE(sampass);
462 : }
463 : }
464 :
465 297 : if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) {
466 :
467 295 : new_passwd = prompt_for_new_password(stdin_passwd_get);
468 295 : if(!new_passwd) {
469 0 : fprintf(stderr, "Unable to get new password.\n");
470 0 : exit(1);
471 : }
472 : }
473 : }
474 :
475 297 : if (!NT_STATUS_IS_OK(password_change(remote_machine,
476 : NULL, user_name,
477 : old_passwd, new_passwd,
478 : local_flags))) {
479 0 : result = 1;
480 0 : goto done;
481 : }
482 :
483 297 : if(remote_machine) {
484 1 : printf("Password changed for user %s on %s.\n", user_name, remote_machine );
485 296 : } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
486 0 : struct samu *sampass = NULL;
487 :
488 0 : sampass = samu_new( NULL );
489 0 : if (!sampass) {
490 0 : fprintf(stderr, "talloc fail for struct samu.\n");
491 0 : exit(1);
492 : }
493 :
494 0 : if (!pdb_getsampwnam(sampass, user_name)) {
495 0 : fprintf(stderr, "Failed to find user %s in passdb backend.\n",
496 : user_name );
497 0 : exit(1);
498 : }
499 :
500 0 : printf("Password changed for user %s.", user_name );
501 0 : if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) {
502 0 : printf(" User has disabled flag set.");
503 : }
504 0 : if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) {
505 0 : printf(" User has no password flag set.");
506 : }
507 0 : printf("\n");
508 0 : TALLOC_FREE(sampass);
509 : }
510 :
511 481 : done:
512 297 : SAFE_FREE(old_passwd);
513 297 : SAFE_FREE(new_passwd);
514 297 : return result;
515 : }
516 :
517 :
518 : /*************************************************************
519 : Handle password changing for non-root.
520 : *************************************************************/
521 :
522 2 : static int process_nonroot(int local_flags)
523 : {
524 2 : struct passwd *pwd = NULL;
525 2 : int result = 0;
526 2 : char *old_pw = NULL;
527 2 : char *new_pw = NULL;
528 2 : const char *username = user_name;
529 2 : const char *domain = NULL;
530 2 : char *p = NULL;
531 :
532 2 : if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) {
533 : /* Extra flags that we can't honor non-root */
534 0 : usage();
535 : }
536 :
537 2 : if (!user_name[0]) {
538 2 : pwd = getpwuid_alloc(talloc_tos(), getuid());
539 2 : if (pwd) {
540 2 : fstrcpy(user_name,pwd->pw_name);
541 2 : TALLOC_FREE(pwd);
542 : } else {
543 0 : fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid());
544 0 : exit(1);
545 : }
546 : }
547 :
548 : /* Allow domain as part of the username */
549 3 : if ((p = strchr_m(user_name, '\\')) ||
550 3 : (p = strchr_m(user_name, '/')) ||
551 2 : (p = strchr_m(user_name, *lp_winbind_separator()))) {
552 0 : *p = '\0';
553 0 : username = p + 1;
554 0 : domain = user_name;
555 : }
556 :
557 : /*
558 : * A non-root user is always setting a password
559 : * via a remote machine (even if that machine is
560 : * localhost).
561 : */
562 :
563 2 : load_interfaces(); /* Delayed from main() */
564 :
565 2 : if (remote_machine != NULL) {
566 2 : if (!is_ipaddress(remote_machine)) {
567 2 : domain = remote_machine;
568 : }
569 : } else {
570 0 : remote_machine = "127.0.0.1";
571 :
572 : /*
573 : * If we deal with a local user, change the password for the
574 : * user in our SAM.
575 : */
576 0 : domain = get_global_sam_name();
577 : }
578 :
579 2 : old_pw = get_pass("Old SMB password:",stdin_passwd_get);
580 2 : if (old_pw == NULL) {
581 0 : fprintf(stderr, "Unable to get old password.\n");
582 0 : exit(1);
583 : }
584 :
585 2 : if (!new_passwd) {
586 2 : new_pw = prompt_for_new_password(stdin_passwd_get);
587 : }
588 : else
589 0 : new_pw = smb_xstrdup(new_passwd);
590 :
591 2 : if (!new_pw) {
592 0 : fprintf(stderr, "Unable to get new password.\n");
593 0 : exit(1);
594 : }
595 :
596 2 : if (!NT_STATUS_IS_OK(password_change(remote_machine,
597 : domain, username,
598 : old_pw, new_pw, 0))) {
599 0 : result = 1;
600 0 : goto done;
601 : }
602 :
603 2 : printf("Password changed for user %s\n", username);
604 :
605 2 : done:
606 2 : SAFE_FREE(old_pw);
607 2 : SAFE_FREE(new_pw);
608 :
609 2 : return result;
610 : }
611 :
612 :
613 :
614 : /*********************************************************
615 : Start here.
616 : **********************************************************/
617 299 : int main(int argc, char **argv)
618 : {
619 299 : TALLOC_CTX *frame = talloc_stackframe();
620 299 : int local_flags = 0;
621 : int ret;
622 :
623 : #if defined(HAVE_SET_AUTH_PARAMETERS)
624 : set_auth_parameters(argc, argv);
625 : #endif /* HAVE_SET_AUTH_PARAMETERS */
626 :
627 299 : if (getuid() == 0) {
628 297 : local_flags = LOCAL_AM_ROOT;
629 : }
630 :
631 299 : smb_init_locale();
632 :
633 299 : local_flags = process_options(argc, argv, local_flags);
634 :
635 299 : setup_logging("smbpasswd", DEBUG_STDERR);
636 :
637 : /* Check the effective uid - make sure we are not setuid */
638 299 : if (is_setuid_root()) {
639 0 : fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
640 0 : exit(1);
641 : }
642 :
643 299 : if (local_flags & LOCAL_AM_ROOT) {
644 : bool ok;
645 :
646 297 : ok = secrets_init();
647 297 : if (!ok) {
648 0 : return 1;
649 : }
650 297 : ret = process_root(local_flags);
651 : } else {
652 2 : ret = process_nonroot(local_flags);
653 : }
654 299 : TALLOC_FREE(frame);
655 299 : return ret;
656 : }
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