source: branches/samba-3.5.x/source3/utils/smbpasswd.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 14.6 KB
Line 
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
21extern bool AllowDebugChange;
22
23/*
24 * Next two lines needed for SunOS and don't
25 * hurt anything else...
26 */
27extern char *optarg;
28extern int optind;
29
30/* forced running in root-mode */
31static bool got_username = False;
32static bool stdin_passwd_get = False;
33static fstring user_name;
34static char *new_passwd = NULL;
35static const char *remote_machine = NULL;
36
37static fstring ldap_secret;
38
39
40/*********************************************************
41 Print command usage on stderr and die.
42**********************************************************/
43static 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
74static void set_line_buffering(FILE *f)
75{
76 setvbuf(f, NULL, _IOLBF, 0);
77}
78
79/*******************************************************************
80 Process command line options
81 ******************************************************************/
82
83static 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*************************************************************/
207static 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
236static 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 ******************************************************************/
277static 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
293static 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_autofree_context(), 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
495static 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_autofree_context(), 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**********************************************************/
565int main(int argc, char **argv)
566{
567 TALLOC_CTX *frame = talloc_stackframe();
568 int local_flags = 0;
569 int ret;
570
571 AllowDebugChange = False;
572
573#if defined(HAVE_SET_AUTH_PARAMETERS)
574 set_auth_parameters(argc, argv);
575#endif /* HAVE_SET_AUTH_PARAMETERS */
576
577 if (getuid() == 0) {
578 local_flags = LOCAL_AM_ROOT;
579 }
580
581 load_case_tables();
582
583 local_flags = process_options(argc, argv, local_flags);
584
585 setup_logging("smbpasswd", True);
586
587 /*
588 * Set the machine NETBIOS name if not already
589 * set from the config file.
590 */
591
592 if (!init_names())
593 return 1;
594
595 /* Check the effective uid - make sure we are not setuid */
596 if (is_setuid_root()) {
597 fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
598 exit(1);
599 }
600
601 if (local_flags & LOCAL_AM_ROOT) {
602 secrets_init();
603 return process_root(local_flags);
604 }
605
606 ret = process_nonroot(local_flags);
607 TALLOC_FREE(frame);
608 return ret;
609}
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