source: branches/samba-3.3.x/source/utils/smbpasswd.c

Last change on this file was 224, checked in by Herwig Bauernfeind, 16 years ago

Update Samba 3.3 branch to 3.3.4
File size: 15.5 KB
RevLine 
[224]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|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
246 LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
247 /* these things can't be done remotely yet */
248 return NT_STATUS_UNSUCCESSFUL;
249 }
250 ret = remote_password_change(remote_mach, username,
251 old_passwd, new_pw, &err_str);
252 if (err_str != NULL)
253 fprintf(stderr, "%s", err_str);
254 SAFE_FREE(err_str);
255 return ret;
256 }
257
258 ret = local_password_change(username, local_flags, new_pw,
259 &err_str, &msg_str);
260
261 if(msg_str)
262 printf("%s", msg_str);
263 if(err_str)
264 fprintf(stderr, "%s", err_str);
265
266 SAFE_FREE(msg_str);
267 SAFE_FREE(err_str);
268 return ret;
269}
270
271/*******************************************************************
272 Store the LDAP admin password in secrets.tdb
273 ******************************************************************/
274static bool store_ldap_admin_pw (char* pw)
275{
276 if (!pw)
277 return False;
278
279 if (!secrets_init())
280 return False;
281
282 return secrets_store_ldap_pw(lp_ldap_admin_dn(), pw);
283}
284
285
286/*************************************************************
287 Handle password changing for root.
288*************************************************************/
289
290static int process_root(int local_flags)
291{
292 struct passwd *pwd;
293 int result = 0;
294 char *old_passwd = NULL;
295
296 if (local_flags & LOCAL_SET_LDAP_ADMIN_PW) {
297 char *ldap_admin_dn = lp_ldap_admin_dn();
298 if ( ! *ldap_admin_dn ) {
299 DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n"));
300 goto done;
301 }
302
303 printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn);
304 if ( ! *ldap_secret ) {
305 new_passwd = prompt_for_new_password(stdin_passwd_get);
306 fstrcpy(ldap_secret, new_passwd);
307 }
308 if (!store_ldap_admin_pw(ldap_secret)) {
309 DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
310 }
311 goto done;
312 }
313
314 /* Ensure passdb startup(). */
315 if(!initialize_password_db(False, NULL)) {
316 DEBUG(0, ("Failed to open passdb!\n"));
317 exit(1);
318 }
319
320 /* Ensure we have a SAM sid. */
321 get_global_sam_sid();
322
323 /*
324 * Ensure both add/delete user are not set
325 * Ensure add/delete user and either remote machine or join domain are
326 * not both set.
327 */
328 if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
329 ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
330 (remote_machine != NULL))) {
331 usage();
332 }
333
334 /* Only load interfaces if we are doing network operations. */
335
336 if (remote_machine) {
337 load_interfaces();
338 }
339
340 if (!user_name[0] && (pwd = getpwuid_alloc(talloc_autofree_context(), geteuid()))) {
341 fstrcpy(user_name, pwd->pw_name);
342 TALLOC_FREE(pwd);
343 }
344
345 if (!user_name[0]) {
346 fprintf(stderr,"You must specify a username\n");
347 exit(1);
348 }
349
350 if (local_flags & LOCAL_TRUST_ACCOUNT) {
351 /* add the $ automatically */
352 static fstring buf;
353
354 /*
355 * Remove any trailing '$' before we
356 * generate the initial machine password.
357 */
358
359 if (user_name[strlen(user_name)-1] == '$') {
360 user_name[strlen(user_name)-1] = 0;
361 }
362
363 if (local_flags & LOCAL_ADD_USER) {
364 SAFE_FREE(new_passwd);
365 new_passwd = smb_xstrdup(user_name);
366 strlower_m(new_passwd);
367 }
368
369 /*
370 * Now ensure the username ends in '$' for
371 * the machine add.
372 */
373
374 slprintf(buf, sizeof(buf)-1, "%s$", user_name);
375 fstrcpy(user_name, buf);
376 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
377 static fstring buf;
378
379 if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) {
380 /*
381 * Prompt for trusting domain's account password
382 */
383 new_passwd = prompt_for_new_password(stdin_passwd_get);
384 if(!new_passwd) {
385 fprintf(stderr, "Unable to get newpassword.\n");
386 exit(1);
387 }
388 }
389
390 /* prepare uppercased and '$' terminated username */
391 slprintf(buf, sizeof(buf) - 1, "%s$", user_name);
392 fstrcpy(user_name, buf);
393
394 } else {
395
396 if (remote_machine != NULL) {
397 old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
398 }
399
400 if (!(local_flags & LOCAL_SET_PASSWORD)) {
401
402 /*
403 * If we are trying to enable a user, first we need to find out
404 * if they are using a modern version of the smbpasswd file that
405 * disables a user by just writing a flag into the file. If so
406 * then we can re-enable a user without prompting for a new
407 * password. If not (ie. they have a no stored password in the
408 * smbpasswd file) then we need to prompt for a new password.
409 */
410
411 if(local_flags & LOCAL_ENABLE_USER) {
412 struct samu *sampass = NULL;
413
414 sampass = samu_new( NULL );
415 if (!sampass) {
416 fprintf(stderr, "talloc fail for struct samu.\n");
417 exit(1);
418 }
419 if (!pdb_getsampwnam(sampass, user_name)) {
420 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
421 user_name );
422 exit(1);
423 }
424
425 if(pdb_get_nt_passwd(sampass) == NULL) {
426 local_flags |= LOCAL_SET_PASSWORD;
427 }
428 TALLOC_FREE(sampass);
429 }
430 }
431
432 if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) {
433 struct passwd *passwd;
434
435 if (remote_machine == NULL) {
436 passwd = getpwnam_alloc(NULL, user_name);
437
438 if (!passwd) {
439 fprintf(stderr, "Cannot locate Unix account for "
440 "'%s'!\n", user_name);
441 exit(1);
442 }
443 TALLOC_FREE(passwd);
444 }
445
446 new_passwd = prompt_for_new_password(stdin_passwd_get);
447
448 if(!new_passwd) {
449 fprintf(stderr, "Unable to get new password.\n");
450 exit(1);
451 }
452 }
453 }
454
455 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name,
456 old_passwd, new_passwd,
457 local_flags))) {
458 fprintf(stderr,"Failed to modify password entry for user %s\n", user_name);
459 result = 1;
460 goto done;
461 }
462
463 if(remote_machine) {
464 printf("Password changed for user %s on %s.\n", user_name, remote_machine );
465 } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
466 struct samu *sampass = NULL;
467
468 sampass = samu_new( NULL );
469 if (!sampass) {
470 fprintf(stderr, "talloc fail for struct samu.\n");
471 exit(1);
472 }
473
474 if (!pdb_getsampwnam(sampass, user_name)) {
475 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
476 user_name );
477 exit(1);
478 }
479
480 printf("Password changed for user %s.", user_name );
481 if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) {
482 printf(" User has disabled flag set.");
483 }
484 if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) {
485 printf(" User has no password flag set.");
486 }
487 printf("\n");
488 TALLOC_FREE(sampass);
489 }
490
491 done:
492 SAFE_FREE(new_passwd);
493 return result;
494}
495
496
497/*************************************************************
498 Handle password changing for non-root.
499*************************************************************/
500
501static int process_nonroot(int local_flags)
502{
503 struct passwd *pwd = NULL;
504 int result = 0;
505 char *old_pw = NULL;
506 char *new_pw = NULL;
507
508 if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) {
509 /* Extra flags that we can't honor non-root */
510 usage();
511 }
512
513 if (!user_name[0]) {
514 pwd = getpwuid_alloc(talloc_autofree_context(), getuid());
515 if (pwd) {
516 fstrcpy(user_name,pwd->pw_name);
517 TALLOC_FREE(pwd);
518 } else {
519 fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid());
520 exit(1);
521 }
522 }
523
524 /*
525 * A non-root user is always setting a password
526 * via a remote machine (even if that machine is
527 * localhost).
528 */
529
530 load_interfaces(); /* Delayed from main() */
531
532 if (remote_machine == NULL) {
533 remote_machine = "127.0.0.1";
534 }
535
536 if (remote_machine != NULL) {
537 old_pw = get_pass("Old SMB password:",stdin_passwd_get);
538 }
539
540 if (!new_passwd) {
541 new_pw = prompt_for_new_password(stdin_passwd_get);
542 }
543 else
544 new_pw = smb_xstrdup(new_passwd);
545
546 if (!new_pw) {
547 fprintf(stderr, "Unable to get new password.\n");
548 exit(1);
549 }
550
551 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name, old_pw,
552 new_pw, 0))) {
553 fprintf(stderr,"Failed to change password for %s\n", user_name);
554 result = 1;
555 goto done;
556 }
557
558 printf("Password changed for user %s\n", user_name);
559
560 done:
561 SAFE_FREE(old_pw);
562 SAFE_FREE(new_pw);
563
564 return result;
565}
566
567
568
569/*********************************************************
570 Start here.
571**********************************************************/
572int main(int argc, char **argv)
573{
574 TALLOC_CTX *frame = talloc_stackframe();
575 int local_flags = 0;
576 int ret;
577
578 AllowDebugChange = False;
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", True);
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 secrets_init();
610 return process_root(local_flags);
611 }
612
613 ret = process_nonroot(local_flags);
614 TALLOC_FREE(frame);
615 return ret;
616}
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