summaryrefslogtreecommitdiff
path: root/source3/utils/smbpasswd.c
blob: b97b0c765fd0c56e36ce6abf2eb4c4308a5d76d5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
/*
 * Unix SMB/Netbios implementation. Version 1.9. smbpasswd module. Copyright
 * (C) Jeremy Allison 1995-1998
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 675
 * Mass Ave, Cambridge, MA 02139, USA.
 */

#include "includes.h"

extern pstring myhostname;
extern pstring global_myname;
extern fstring global_myworkgroup;

static char *prog_name;

/*********************************************************
 Print command usage on stderr and die.
**********************************************************/

static void usage(char *name, BOOL is_root)
{
	if(is_root)
		fprintf(stderr, "Usage is : %s [-D DEBUGLEVEL] [-a] [-d] [-e] [-m] [-n] [username] [password]\n\
%s: [-R <name resolve order>] [-D DEBUGLEVEL] [-j DOMAINNAME] [-r machine] [-U remote_username] [username] [password]\n%s: [-h]\n", name, name, name);
	else
		fprintf(stderr, "Usage is : %s [-h] [-D DEBUGLEVEL] [-r machine] [-U remote_username] [password]\n", name);
	exit(1);
}

/*********************************************************
Join a domain.
**********************************************************/

static int join_domain( char *domain, char *remote)
{
  pstring remote_machine;
  fstring trust_passwd;
  unsigned char orig_trust_passwd_hash[16];
  BOOL ret;

  pstrcpy(remote_machine, remote ? remote : "");
  fstrcpy(trust_passwd, global_myname);
  strlower(trust_passwd);
  E_md4hash( (uchar *)trust_passwd, orig_trust_passwd_hash);

  /* Ensure that we are not trying to join a
     domain if we are locally set up as a domain
     controller. */

  if(lp_domain_controller() && strequal(lp_workgroup(), domain)) {
    fprintf(stderr, "%s: Cannot join domain %s as we already configured as \
domain controller for that domain.\n", prog_name, domain);
    return 1;
  }

  /*
   * Create the machine account password file.
   */
  if(!trust_password_lock( domain, global_myname, True)) {
    fprintf(stderr, "%s: unable to open the machine account password file for \
machine %s in domain %s.\n", prog_name, global_myname, domain); 
    return 1;
  }

  /*
   * Write the old machine account password.
   */

  if(!set_trust_account_password( orig_trust_passwd_hash)) {              
    fprintf(stderr, "%s: unable to write the machine account password for \
machine %s in domain %s.\n", prog_name, global_myname, domain);
    trust_password_unlock();
    return 1;
  }

  /*
   * If we are given a remote machine assume this is the PDC.
   */

  if(remote == NULL)
    pstrcpy(remote_machine, lp_passwordserver());

  if(!*remote_machine) {
    fprintf(stderr, "%s: No password server list given in smb.conf - \
unable to join domain.\n", prog_name);
    trust_password_unlock();
    return 1;
  }

  ret = change_trust_account_password( domain, remote_machine);
  trust_password_unlock();

  if(!ret) {
    trust_password_delete( domain, global_myname);
    fprintf(stderr,"%s: Unable to join domain %s.\n", prog_name, domain);
  } else {
    printf("%s: Joined domain %s.\n", prog_name, domain);
  }

  return (int)ret;
}

/*************************************************************
 Utility function to create password hashes.
*************************************************************/

static void create_new_hashes( char *new_passwd, uchar *new_p16, uchar *new_nt_p16)
{
  memset(new_nt_p16, '\0', 16);
  E_md4hash((uchar *) new_passwd, new_nt_p16);
  
  /* Mangle the password into Lanman format */
  new_passwd[14] = '\0';
  strupper(new_passwd);
  
  /*
   * Calculate the SMB (lanman) hash functions of the new password.
   */
  
  memset(new_p16, '\0', 16);
  E_P16((uchar *) new_passwd, new_p16);
}

/*************************************************************
 Utility function to prompt for new password.
*************************************************************/

static void prompt_for_new_password(char *new_passwd)
{
  char *p;

  new_passwd[0] = '\0';
  
  p = getpass("New SMB password:");

  strncpy(new_passwd, p, sizeof(fstring));
  new_passwd[sizeof(fstring)-1] = '\0';

  p = getpass("Retype new SMB password:");

  if (strncmp(p, new_passwd, sizeof(fstring)-1))
  {
    fprintf(stderr, "%s: Mismatch - password unchanged.\n", prog_name);
    exit(1);
  }

  if (new_passwd[0] == '\0') {
    printf("Password not set\n");
    exit(0);
  }
}

/*********************************************************
 Start here.
**********************************************************/

int main(int argc, char **argv)
{
  extern char *optarg;
  extern int optind;
  extern int DEBUGLEVEL;
  int             real_uid;
  struct passwd  *pwd;
  fstring         old_passwd;
  fstring         new_passwd;
  uchar           new_p16[16];
  uchar           new_nt_p16[16];
  char           *p;
  struct smb_passwd *smb_pwent;
  FILE           *fp;
  int             ch;
  int             err;
  BOOL is_root = False;
  pstring  user_name;
  BOOL remote_user_name = False;
  char *remote_machine = NULL;
  BOOL add_user = False;
  BOOL got_new_pass = False;
  BOOL trust_account = False;
  BOOL disable_user = False;
  BOOL enable_user = False;
  BOOL set_no_password = False;
  BOOL joining_domain = False;
  char *new_domain = NULL;
  pstring servicesf = CONFIGFILE;
  void           *vp;

  new_passwd[0] = '\0';
  user_name[0] = '\0';

  memset(old_passwd, '\0', sizeof(old_passwd));
  memset(new_passwd, '\0', sizeof(new_passwd));

  prog_name = argv[0];

  TimeInit();

  setup_logging(prog_name,True);
  
  charset_initialise();

  if(!initialize_password_db()) {
    fprintf(stderr, "%s: Can't setup password database vectors.\n", prog_name);
    exit(1);
  }

  if (!lp_load(servicesf,True,False,False)) {
    fprintf(stderr, "%s: Can't load %s - run testparm to debug it\n", prog_name, servicesf);
    exit(1);
  }

  if(!get_myname(myhostname,NULL)) {
    fprintf(stderr, "%s: unable to get my hostname.\n", prog_name );
    exit(1);
  }

  /*
   * Set the machine NETBIOS name if not already
   * set from the config file. 
   */ 
    
  if (!*global_myname)
  {   
    fstrcpy( global_myname, myhostname );
    p = strchr( global_myname, '.' );
    if (p) 
      *p = 0;
  }           
  strupper( global_myname );

  codepage_initialise(lp_client_code_page());

  /* Get the real uid */
  real_uid = getuid();
  
  /* Check the effective uid */
  if ((geteuid() == 0) && (real_uid != 0)) {
    fprintf(stderr, "%s: Must *NOT* be setuid root.\n", prog_name);
    exit(1);
  }

  is_root = (real_uid == 0);

  while ((ch = getopt(argc, argv, "adehmnj:r:R:D:U:")) != EOF) {
    switch(ch) {
    case 'a':
      if(is_root)
        add_user = True;
      else
        usage(prog_name, is_root);
      break;
    case 'd':
      if(is_root) {
        disable_user = True;
        got_new_pass = True;
        fstrcpy(new_passwd, "XXXXXX");
      } else
        usage(prog_name, is_root);
      break;
    case 'e':
      if(is_root) {
        enable_user = True;
        got_new_pass = True;
        fstrcpy(new_passwd, "XXXXXX");
      } else
        usage(prog_name, is_root);
      break;
    case 'D':
      DEBUGLEVEL = atoi(optarg);
      break;
    case 'n':
      if(is_root) {
        set_no_password = True;
        got_new_pass = True;
        fstrcpy(new_passwd, "NO PASSWORD");
      } else
        usage(prog_name, is_root);
    case 'r':
      remote_machine = optarg;
      break;
    case 'R':
      if(is_root) {
        lp_set_name_resolve_order(optarg);
        break;
      } else
        usage(prog_name, is_root);
    case 'm':
      if(is_root) {
        trust_account = True;
      } else
        usage(prog_name, is_root);
      break;
    case 'j':
      if(is_root) {
        new_domain = optarg;
        strupper(new_domain);
        joining_domain = True;
      } else
        usage(prog_name, is_root);  
      break;
    case 'U':
      remote_user_name = True;
      pstrcpy(user_name, optarg);
      break;
    case 'h':
    default:
      usage(prog_name, is_root);
    }
  }

  argc -= optind;
  argv += optind;

  if (!is_root && remote_user_name && !remote_machine) {
    fprintf(stderr, "%s: You can only use -U with -r.\n", prog_name);
    usage(prog_name, False);
  }

  /*
   * Ensure add_user and either remote machine or join domain are
   * not both set.
   */

  if(add_user && ((remote_machine != NULL) || joining_domain))
    usage(prog_name, True);

  /*
   * Deal with joining a domain.
   */
  if(joining_domain && argc != 0)
    usage(prog_name, True);

  if(joining_domain) {
    return join_domain( new_domain, remote_machine);
  }

  if(is_root) {

    /*
     * Deal with root - can add a user, but only locally.
     */

    switch(argc) {
      case 0:
        break;
      case 1:
        /* If we are root we can change another's password. */
        pstrcpy(user_name, argv[0]);
        break;
      case 2:
        pstrcpy(user_name, argv[0]);
        fstrcpy(new_passwd, argv[1]);
        got_new_pass = True;
        break;
      default:
        usage(prog_name, True);
    }

    if(*user_name) {

      if(trust_account) {
        int username_len = strlen(user_name);
        if(username_len >= sizeof(pstring) - 1) {
          fprintf(stderr, "%s: machine account name too long.\n", user_name);
          exit(1);
        }

        if(user_name[username_len-1] != '$') {
          user_name[username_len] = '$';
          user_name[username_len+1] = '\0';
        }
      }

      if(!remote_machine && ((pwd = Get_Pwnam(user_name, True)) == NULL)) {
        fprintf(stderr, "%s: User \"%s\" was not found in system password file.\n", 
                    prog_name, user_name);
        exit(1);
      }
    } else {
      if((pwd = getpwuid(real_uid)) != NULL)
        pstrcpy( user_name, pwd->pw_name);
    }

  } else {

    if(add_user) {
      fprintf(stderr, "%s: Only root can add a user.\n", prog_name);
      usage(prog_name, False);
    }

    if(disable_user) {
      fprintf(stderr, "%s: Only root can disable a user.\n", prog_name);
      usage(prog_name, False);
    }

    if(enable_user) {
      fprintf(stderr, "%s: Only root can enable a user.\n", prog_name);
      usage(prog_name, False);
    }

    if(argc > 1)
      usage(prog_name, False);

    if(argc == 1) {
      fstrcpy(new_passwd, argv[0]);
      got_new_pass = True;
    }

    if(!remote_user_name && ((pwd = getpwuid(real_uid)) != NULL))
      pstrcpy( user_name, pwd->pw_name);

    /*
     * A non-root user is always setting a password
     * via a remote machine (even if that machine is
     * localhost).
     */

    if(remote_machine == NULL)
      remote_machine = "127.0.0.1";
  }    
    
  if (*user_name == '\0') {
    fprintf(stderr, "%s: Unable to get a user name for password change.\n", prog_name);
    exit(1);
  }

  /*
   * If we are adding a machine account then pretend
   * we already have the new password, we will be using
   * the machinename as the password.
   */

  if(add_user && trust_account) {
    got_new_pass = True;
    strncpy(new_passwd, user_name, sizeof(fstring));
    new_passwd[sizeof(fstring)-1] = '\0';
    strlower(new_passwd);
    if(new_passwd[strlen(new_passwd)-1] == '$')
      new_passwd[strlen(new_passwd)-1] = '\0';
  }

  /* 
   * If we are root we don't ask for the old password (unless it's on a
   * remote machine.
   */

  if (remote_machine != NULL) {
    p = getpass("Old SMB password:");
    fstrcpy(old_passwd, p);
  }

  if (!got_new_pass)
    prompt_for_new_password(new_passwd);
  
  if (new_passwd[0] == '\0') {
    printf("Password not set\n");
    exit(0);
  }
 
  /* 
   * Now do things differently depending on if we're changing the
   * password on a remote machine. Remember - a normal user is
   * always using this code, looping back to the local smbd.
   */

  if(remote_machine != NULL) {
    struct cli_state cli;
    struct in_addr ip;

    if(!resolve_name( remote_machine, &ip)) {
      fprintf(stderr, "%s: unable to find an IP address for machine %s.\n",
              prog_name, remote_machine );
      exit(1);
    }
 
    ZERO_STRUCT(cli);
 
    if (!cli_initialise(&cli) || !cli_connect(&cli, remote_machine, &ip)) {
      fprintf(stderr, "%s: unable to connect to SMB server on machine %s. Error was : %s.\n",
              prog_name, remote_machine, cli_errstr(&cli) );
      exit(1);
    }
  
    if (!cli_session_request(&cli, remote_machine, 0x20, global_myname)) {
      fprintf(stderr, "%s: machine %s rejected the session setup. Error was : %s.\n",
              prog_name, remote_machine, cli_errstr(&cli) );
      cli_shutdown(&cli);
      exit(1);
    }
  
    cli.protocol = PROTOCOL_NT1;

    if (!cli_negprot(&cli)) {
      fprintf(stderr, "%s: machine %s rejected the negotiate protocol. Error was : %s.\n",        
              prog_name, remote_machine, cli_errstr(&cli) );
      cli_shutdown(&cli);
      exit(1);
    }
  
    if (!cli_session_setup(&cli, user_name, old_passwd, strlen(old_passwd),
                           "", 0, "")) {
      fprintf(stderr, "%s: machine %s rejected the session setup. Error was : %s.\n",        
              prog_name, remote_machine, cli_errstr(&cli) );
      cli_shutdown(&cli);
      exit(1);
    }               

    if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
      fprintf(stderr, "%s: machine %s rejected the tconX on the IPC$ share. Error was : %s.\n",
              prog_name, remote_machine, cli_errstr(&cli) );
      cli_shutdown(&cli);
      exit(1);
    }

    if(!cli_oem_change_password(&cli, user_name, new_passwd, old_passwd)) {
      fprintf(stderr, "%s: machine %s rejected the password change: Error was : %s.\n",
              prog_name, remote_machine, cli_errstr(&cli) );
      cli_shutdown(&cli);
      exit(1);
    }

    cli_shutdown(&cli);
    exit(0);
  }

  /*
   * Check for a machine account.
   */

  if(trust_account && !pwd) {
    fprintf(stderr, "%s: User %s does not exist in system password file \
(usually /etc/passwd). Cannot add machine account without a valid system user.\n",
           prog_name, user_name);
    exit(1);
  }

  /* Calculate the MD4 hash (NT compatible) of the new password. */
  
  create_new_hashes( new_passwd, new_p16, new_nt_p16);

  /*
   * Open the smbpaswd file.
   */
  vp = startsmbpwent(True);
  if (!vp && errno == ENOENT) {
      fprintf(stderr,"%s: smbpasswd file did not exist - attempting to create it.\n", prog_name);
	  fp = fopen(lp_smb_passwd_file(), "w");
	  if (fp) {
		  fprintf(fp, "# Samba SMB password file\n");
		  fclose(fp);
		  vp = startsmbpwent(True);
	  }
  }
  if (!vp) {
	  err = errno;
	  fprintf(stderr, "%s: Failed to open password file %s.\n",
		  prog_name, lp_smb_passwd_file());
	  errno = err;
	  perror(prog_name);
	  exit(err);
  }
  
  /* Get the smb passwd entry for this user */
  smb_pwent = getsmbpwnam(user_name);
  if (smb_pwent == NULL) {
    if(add_user == False) {
      fprintf(stderr, "%s: Failed to find entry for user %s.\n",
  	      prog_name, pwd->pw_name);
      endsmbpwent(vp);
      exit(1);
    }

    /* Create a new smb passwd entry and set it to the given password. */
    {
      struct smb_passwd new_smb_pwent;

      new_smb_pwent.smb_userid = pwd->pw_uid;
      new_smb_pwent.smb_name = pwd->pw_name; 
      new_smb_pwent.smb_passwd = NULL;
      new_smb_pwent.smb_nt_passwd = NULL;
      new_smb_pwent.acct_ctrl = (trust_account ? ACB_WSTRUST : ACB_NORMAL);

      if(disable_user) {
        new_smb_pwent.acct_ctrl |= ACB_DISABLED;
      } else if (set_no_password) {
        new_smb_pwent.acct_ctrl |= ACB_PWNOTREQ;
      } else {
        new_smb_pwent.smb_passwd = new_p16;
        new_smb_pwent.smb_nt_passwd = new_nt_p16;
      }

      if(add_smbpwd_entry(&new_smb_pwent) == False) {
        fprintf(stderr, "%s: Failed to add entry for user %s.\n", 
                prog_name, pwd->pw_name);
        endsmbpwent(vp);
        exit(1);
      }
      
      endsmbpwent(vp);
      printf("%s: Added user %s.\n", prog_name, user_name);
      exit(0);
    }
  } else {
	  /* the entry already existed */
	  add_user = False;
  }

  /*
   * We are root - just write the new password
   * and the valid last change time.
   */

  if(disable_user)
    smb_pwent->acct_ctrl |= ACB_DISABLED;
  else if (enable_user) {
    if(smb_pwent->smb_passwd == NULL) {
      prompt_for_new_password(new_passwd);
      create_new_hashes( new_passwd, new_p16, new_nt_p16);
      smb_pwent->smb_passwd = new_p16;
      smb_pwent->smb_nt_passwd = new_nt_p16;
    }
    smb_pwent->acct_ctrl &= ~ACB_DISABLED;
  } else if (set_no_password)
    smb_pwent->acct_ctrl |= ACB_PWNOTREQ;
  else {
    smb_pwent->smb_passwd = new_p16;
    smb_pwent->smb_nt_passwd = new_nt_p16;
  }

  if(mod_smbpwd_entry(smb_pwent,True) == False) {
    fprintf(stderr, "%s: Failed to modify entry for user %s.\n",
            prog_name, pwd->pw_name);
    endsmbpwent(vp);
    exit(1);
  }

  endsmbpwent(vp);
  if(disable_user)
    printf("User %s disabled.\n", user_name);
  else if(enable_user)
    printf("User %s enabled.\n", user_name);
  else if (set_no_password)
    printf("User %s - set to no password.\n", user_name);
  else
    printf("Password changed for user %s.\n", user_name);
  return 0;
}