source: branches/samba-3.0/source/utils/smbpasswd.c@ 407

Last change on this file since 407 was 124, checked in by Paul Smedley, 17 years ago

Update source to 3.0.28a
File size: 15.1 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 2 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, write to the Free Software Foundation, Inc., 675
18 * Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "includes.h"
21
22extern BOOL AllowDebugChange;
23
24/*
25 * Next two lines needed for SunOS and don't
26 * hurt anything else...
27 */
28extern char *optarg;
29extern int optind;
30
31/* forced running in root-mode */
32static BOOL got_username = False;
33static BOOL stdin_passwd_get = False;
34static fstring user_name;
35static char *new_passwd = NULL;
36static const char *remote_machine = NULL;
37
38static fstring ldap_secret;
39
40
41/*********************************************************
42 Print command usage on stderr and die.
43**********************************************************/
44static void usage(void)
45{
46 printf("When run by root:\n");
47 printf(" smbpasswd [options] [username]\n");
48 printf("otherwise:\n");
49 printf(" smbpasswd [options]\n\n");
50
51 printf("options:\n");
52 printf(" -L local mode (must be first option)\n");
53 printf(" -h print this usage message\n");
54 printf(" -s use stdin for password prompt\n");
55 printf(" -c smb.conf file Use the given path to the smb.conf file\n");
56 printf(" -D LEVEL debug level\n");
57 printf(" -r MACHINE remote machine\n");
58 printf(" -U USER remote username\n");
59
60 printf("extra options when run by root or in local mode:\n");
61 printf(" -a add user\n");
62 printf(" -d disable user\n");
63 printf(" -e enable user\n");
64 printf(" -i interdomain trust account\n");
65 printf(" -m machine trust account\n");
66 printf(" -n set no password\n");
67 printf(" -W use stdin ldap admin password\n");
68 printf(" -w PASSWORD ldap admin password\n");
69 printf(" -x delete user\n");
70 printf(" -R ORDER name resolve order\n");
71
72 exit(1);
73}
74
75static void set_line_buffering(FILE *f)
76{
77 setvbuf(f, NULL, _IOLBF, 0);
78}
79
80/*******************************************************************
81 Process command line options
82 ******************************************************************/
83
84static int process_options(int argc, char **argv, int local_flags)
85{
86 int ch;
87 pstring configfile;
88 pstrcpy(configfile, dyn_CONFIGFILE);
89
90 local_flags |= LOCAL_SET_PASSWORD;
91
92 ZERO_STRUCT(user_name);
93
94 user_name[0] = '\0';
95
96 while ((ch = getopt(argc, argv, "c:axdehminjr:sw:R:D:U:LW")) != EOF) {
97 switch(ch) {
98 case 'L':
99#if !defined(DEVELOPER)
100 if (getuid() != 0) {
101 fprintf(stderr, "smbpasswd -L can only be used by root.\n");
102 exit(1);
103 }
104#endif
105 local_flags |= LOCAL_AM_ROOT;
106 break;
107 case 'c':
108 pstrcpy(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 new_passwd = smb_xstrdup("NO PASSWORD");
139 break;
140 case 'r':
141 remote_machine = optarg;
142 break;
143 case 's':
144 set_line_buffering(stdin);
145 set_line_buffering(stdout);
146 set_line_buffering(stderr);
147 stdin_passwd_get = True;
148 break;
149 case 'w':
150 local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
151 fstrcpy(ldap_secret, optarg);
152 break;
153 case 'R':
154 lp_set_name_resolve_order(optarg);
155 break;
156 case 'D':
157 DEBUGLEVEL = atoi(optarg);
158 break;
159 case 'U': {
160 got_username = True;
161 fstrcpy(user_name, optarg);
162 break;
163 case 'W':
164 local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
165 *ldap_secret = '\0';
166 break;
167 }
168 case 'h':
169 default:
170 usage();
171 }
172 }
173
174 argc -= optind;
175 argv += optind;
176
177 switch(argc) {
178 case 0:
179 if (!got_username)
180 fstrcpy(user_name, "");
181 break;
182 case 1:
183 if (!(local_flags & LOCAL_AM_ROOT)) {
184 usage();
185 } else {
186 if (got_username) {
187 usage();
188 } else {
189 fstrcpy(user_name, argv[0]);
190 }
191 }
192 break;
193 default:
194 usage();
195 }
196
197 if (!lp_load(configfile,True,False,False,True)) {
198 fprintf(stderr, "Can't load %s - run testparm to debug it\n",
199 configfile);
200 exit(1);
201 }
202
203 return local_flags;
204}
205
206/*************************************************************
207 Utility function to prompt for new password.
208*************************************************************/
209static char *prompt_for_new_password(BOOL stdin_get)
210{
211 char *p;
212 fstring new_pw;
213
214 ZERO_ARRAY(new_pw);
215
216 p = get_pass("New SMB password:", stdin_get);
217
218 fstrcpy(new_pw, p);
219 SAFE_FREE(p);
220
221 p = get_pass("Retype new SMB password:", stdin_get);
222
223 if (strcmp(p, new_pw)) {
224 fprintf(stderr, "Mismatch - password unchanged.\n");
225 ZERO_ARRAY(new_pw);
226 SAFE_FREE(p);
227 return NULL;
228 }
229
230 return p;
231}
232
233
234/*************************************************************
235 Change a password either locally or remotely.
236*************************************************************/
237
238static NTSTATUS password_change(const char *remote_mach, char *username,
239 char *old_passwd, char *new_pw,
240 int local_flags)
241{
242 NTSTATUS ret;
243 pstring err_str;
244 pstring msg_str;
245
246 if (remote_mach != NULL) {
247 if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
248 LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
249 /* these things can't be done remotely yet */
250 return NT_STATUS_UNSUCCESSFUL;
251 }
252 ret = remote_password_change(remote_mach, username,
253 old_passwd, new_pw, err_str, sizeof(err_str));
254 if(*err_str)
255 fprintf(stderr, "%s", err_str);
256 return ret;
257 }
258
259 ret = local_password_change(username, local_flags, new_pw,
260 err_str, sizeof(err_str), msg_str, sizeof(msg_str));
261
262 if(*msg_str)
263 printf("%s", msg_str);
264 if(*err_str)
265 fprintf(stderr, "%s", err_str);
266
267 return ret;
268}
269
270/*******************************************************************
271 Store the LDAP admin password in secrets.tdb
272 ******************************************************************/
273static BOOL store_ldap_admin_pw (char* pw)
274{
275 if (!pw)
276 return False;
277
278 if (!secrets_init())
279 return False;
280
281 return secrets_store_ldap_pw(lp_ldap_admin_dn(), pw);
282}
283
284
285/*************************************************************
286 Handle password changing for root.
287*************************************************************/
288
289static int process_root(int local_flags)
290{
291 struct passwd *pwd;
292 int result = 0;
293 char *old_passwd = NULL;
294
295 if (local_flags & LOCAL_SET_LDAP_ADMIN_PW) {
296 char *ldap_admin_dn = lp_ldap_admin_dn();
297 if ( ! *ldap_admin_dn ) {
298 DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n"));
299 goto done;
300 }
301
302 printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn);
303 if ( ! *ldap_secret ) {
304 new_passwd = prompt_for_new_password(stdin_passwd_get);
305 fstrcpy(ldap_secret, new_passwd);
306 }
307 if (!store_ldap_admin_pw(ldap_secret)) {
308 DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
309 }
310 goto done;
311 }
312
313 /* Ensure passdb startup(). */
314 if(!initialize_password_db(False)) {
315 DEBUG(0, ("Failed to open passdb!\n"));
316 exit(1);
317 }
318
319 /* Ensure we have a SAM sid. */
320 get_global_sam_sid();
321
322 /*
323 * Ensure both add/delete user are not set
324 * Ensure add/delete user and either remote machine or join domain are
325 * not both set.
326 */
327 if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
328 ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
329 (remote_machine != NULL))) {
330 usage();
331 }
332
333 /* Only load interfaces if we are doing network operations. */
334
335 if (remote_machine) {
336 load_interfaces();
337 }
338
339 if (!user_name[0] && (pwd = getpwuid_alloc(NULL, geteuid()))) {
340 fstrcpy(user_name, pwd->pw_name);
341 TALLOC_FREE(pwd);
342 }
343
344 if (!user_name[0]) {
345 fprintf(stderr,"You must specify a username\n");
346 exit(1);
347 }
348
349 if (local_flags & LOCAL_TRUST_ACCOUNT) {
350 /* add the $ automatically */
351 static fstring buf;
352
353 /*
354 * Remove any trailing '$' before we
355 * generate the initial machine password.
356 */
357
358 if (user_name[strlen(user_name)-1] == '$') {
359 user_name[strlen(user_name)-1] = 0;
360 }
361
362 if (local_flags & LOCAL_ADD_USER) {
363 SAFE_FREE(new_passwd);
364 new_passwd = smb_xstrdup(user_name);
365 strlower_m(new_passwd);
366 }
367
368 /*
369 * Now ensure the username ends in '$' for
370 * the machine add.
371 */
372
373 slprintf(buf, sizeof(buf)-1, "%s$", user_name);
374 fstrcpy(user_name, buf);
375 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
376 static fstring buf;
377
378 if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) {
379 /*
380 * Prompt for trusting domain's account password
381 */
382 new_passwd = prompt_for_new_password(stdin_passwd_get);
383 if(!new_passwd) {
384 fprintf(stderr, "Unable to get newpassword.\n");
385 exit(1);
386 }
387 }
388
389 /* prepare uppercased and '$' terminated username */
390 slprintf(buf, sizeof(buf) - 1, "%s$", user_name);
391 fstrcpy(user_name, buf);
392
393 } else {
394
395 if (remote_machine != NULL) {
396 old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
397 }
398
399 if (!(local_flags & LOCAL_SET_PASSWORD)) {
400
401 /*
402 * If we are trying to enable a user, first we need to find out
403 * if they are using a modern version of the smbpasswd file that
404 * disables a user by just writing a flag into the file. If so
405 * then we can re-enable a user without prompting for a new
406 * password. If not (ie. they have a no stored password in the
407 * smbpasswd file) then we need to prompt for a new password.
408 */
409
410 if(local_flags & LOCAL_ENABLE_USER) {
411 struct samu *sampass = NULL;
412
413 sampass = samu_new( NULL );
414 if (!sampass) {
415 fprintf(stderr, "talloc fail for struct samu.\n");
416 exit(1);
417 }
418 if (!pdb_getsampwnam(sampass, user_name)) {
419 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
420 user_name );
421 exit(1);
422 }
423
424 if(pdb_get_nt_passwd(sampass) == NULL) {
425 local_flags |= LOCAL_SET_PASSWORD;
426 }
427 TALLOC_FREE(sampass);
428 }
429 }
430
431 if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) {
432 new_passwd = prompt_for_new_password(stdin_passwd_get);
433
434 if(!new_passwd) {
435 fprintf(stderr, "Unable to get new password.\n");
436 exit(1);
437 }
438 }
439 }
440
441 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name,
442 old_passwd, new_passwd,
443 local_flags))) {
444 fprintf(stderr,"Failed to modify password entry for user %s\n", user_name);
445 result = 1;
446 goto done;
447 }
448
449 if(remote_machine) {
450 printf("Password changed for user %s on %s.\n", user_name, remote_machine );
451 } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
452 struct samu *sampass = NULL;
453
454 sampass = samu_new( NULL );
455 if (!sampass) {
456 fprintf(stderr, "talloc fail for struct samu.\n");
457 exit(1);
458 }
459
460 if (!pdb_getsampwnam(sampass, user_name)) {
461 fprintf(stderr, "Failed to find user %s in passdb backend.\n",
462 user_name );
463 exit(1);
464 }
465
466 printf("Password changed for user %s.", user_name );
467 if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) {
468 printf(" User has disabled flag set.");
469 }
470 if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) {
471 printf(" User has no password flag set.");
472 }
473 printf("\n");
474 TALLOC_FREE(sampass);
475 }
476
477 done:
478 SAFE_FREE(new_passwd);
479 return result;
480}
481
482
483/*************************************************************
484 Handle password changing for non-root.
485*************************************************************/
486
487static int process_nonroot(int local_flags)
488{
489 struct passwd *pwd = NULL;
490 int result = 0;
491 char *old_pw = NULL;
492 char *new_pw = NULL;
493
494 if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) {
495 /* Extra flags that we can't honor non-root */
496 usage();
497 }
498
499 if (!user_name[0]) {
500 pwd = getpwuid_alloc(NULL, getuid());
501 if (pwd) {
502 fstrcpy(user_name,pwd->pw_name);
503 TALLOC_FREE(pwd);
504 } else {
505 fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid());
506 exit(1);
507 }
508 }
509
510 /*
511 * A non-root user is always setting a password
512 * via a remote machine (even if that machine is
513 * localhost).
514 */
515
516 load_interfaces(); /* Delayed from main() */
517
518 if (remote_machine == NULL) {
519 remote_machine = "127.0.0.1";
520 }
521
522 if (remote_machine != NULL) {
523 old_pw = get_pass("Old SMB password:",stdin_passwd_get);
524 }
525
526 if (!new_passwd) {
527 new_pw = prompt_for_new_password(stdin_passwd_get);
528 }
529 else
530 new_pw = smb_xstrdup(new_passwd);
531
532 if (!new_pw) {
533 fprintf(stderr, "Unable to get new password.\n");
534 exit(1);
535 }
536
537 if (!NT_STATUS_IS_OK(password_change(remote_machine, user_name, old_pw,
538 new_pw, 0))) {
539 fprintf(stderr,"Failed to change password for %s\n", user_name);
540 result = 1;
541 goto done;
542 }
543
544 printf("Password changed for user %s\n", user_name);
545
546 done:
547 SAFE_FREE(old_pw);
548 SAFE_FREE(new_pw);
549
550 return result;
551}
552
553
554
555/*********************************************************
556 Start here.
557**********************************************************/
558int main(int argc, char **argv)
559{
560 int local_flags = 0;
561
562 AllowDebugChange = False;
563
564#if defined(HAVE_SET_AUTH_PARAMETERS)
565 set_auth_parameters(argc, argv);
566#endif /* HAVE_SET_AUTH_PARAMETERS */
567
568 if (getuid() == 0) {
569 local_flags = LOCAL_AM_ROOT;
570 }
571
572 load_case_tables();
573
574 local_flags = process_options(argc, argv, local_flags);
575
576 setup_logging("smbpasswd", True);
577
578 /*
579 * Set the machine NETBIOS name if not already
580 * set from the config file.
581 */
582
583 if (!init_names())
584 return 1;
585
586 /* Check the effective uid - make sure we are not setuid */
587 if (is_setuid_root()) {
588 fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
589 exit(1);
590 }
591
592 if (local_flags & LOCAL_AM_ROOT) {
593 secrets_init();
594 return process_root(local_flags);
595 }
596
597 return process_nonroot(local_flags);
598}
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