source3/utils/smbpasswd.c

   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
  22 extern pstring global_myname;
  23 extern BOOL AllowDebugChange;
  24
  25 /*
  26  * Next two lines needed for SunOS and don't
  27  * hurt anything else...
  28  */
  29 extern char *optarg;
  30 extern int optind;
  31
  32 /* forced running in root-mode */
  33 static BOOL local_mode;
  34 static BOOL got_pass = False, got_username = False;
  35 static int local_flags = 0;
  36 static BOOL stdin_passwd_get = False;
  37 static fstring user_name, user_password;
  38 static char *new_domain = NULL;
  39 static char *new_passwd = NULL;
  40 static char *old_passwd = NULL;
  41 static char *remote_machine = NULL;
  42 static pstring configfile;
  43
  44 #ifdef WITH_LDAP_SAM
  45 static fstring ldap_secret;
  46 #endif
  47
  48 /*********************************************************
  49  Print command usage on stderr and die.
  50 **********************************************************/
  51 static void usage(void)
  52 {
  53         printf("When run by root:\n");
  54         printf("    smbpasswd [options] [username] [password]\n");
  55         printf("otherwise:\n");
  56         printf("    smbpasswd [options] [password]\n\n");
  57
  58         printf("options:\n");
  59         printf("  -L                   local mode (must be first option)\n");
  60         printf("  -h                   print this usage message\n");
  61         printf("  -s                   use stdin for password prompt\n");
  62         printf("  -c smb.conf file     Use the given path to the smb.conf file\n");
  63         printf("  -D LEVEL             debug level\n");
  64         printf("  -r MACHINE           remote machine\n");
  65         printf("  -U USER              remote username\n");
  66
  67         printf("extra options when run by root or in local mode:\n");
  68         printf("  -a                   add user\n");
  69         printf("  -d                   disable user\n");
  70         printf("  -e                   enable user\n");
  71         printf("  -i                   interdomain trust account\n");
  72         printf("  -m                   machine trust account\n");
  73         printf("  -n                   set no password\n");
  74 #ifdef WITH_LDAP_SAM
  75         printf("  -w                   ldap admin password\n");
  76 #endif
  77         printf("  -x                   delete user\n");
  78         printf("  -R ORDER             name resolve order\n");
  79
  80         exit(1);
  81 }
  82
  83 static void set_line_buffering(FILE *f)
  84 {
  85         setvbuf(f, NULL, _IOLBF, 0);
  86 }
  87
  88 /*******************************************************************
  89  Process command line options
  90  ******************************************************************/
  91 static void process_options(int argc, char **argv, BOOL amroot)
  92 {
  93         int ch;
  94
  95         if (amroot)
  96                 local_flags = LOCAL_SET_PASSWORD;
  97
  98         ZERO_STRUCT(user_name);
  99         ZERO_STRUCT(user_password);
 100
 101         user_name[0] = '\0';
 102
 103         while ((ch = getopt(argc, argv, "c:axdehmnj:r:sw:R:D:U:L")) != EOF) {
 104                 switch(ch) {
 105                 case 'L':
 106                         local_mode = amroot = True;
 107                         local_flags = LOCAL_SET_PASSWORD;
 108                         break;
 109                 case 'c':
 110                         pstrcpy(configfile,optarg);
 111                         break;
 112                 case 'a':
 113                         if (!amroot) goto bad_args;
 114                         local_flags |= LOCAL_ADD_USER;
 115                         break;
 116                 case 'x':
 117                         if (!amroot) goto bad_args;
 118                         local_flags |= LOCAL_DELETE_USER;
 119                         local_flags &= ~LOCAL_SET_PASSWORD;
 120                         break;
 121                 case 'd':
 122                         if (!amroot) goto bad_args;
 123                         local_flags |= LOCAL_DISABLE_USER;
 124                         local_flags &= ~LOCAL_SET_PASSWORD;
 125                         break;
 126                 case 'e':
 127                         if (!amroot) goto bad_args;
 128                         local_flags |= LOCAL_ENABLE_USER;
 129                         local_flags &= ~LOCAL_SET_PASSWORD;
 130                         break;
 131                 case 'm':
 132                         if (!amroot) goto bad_args;
 133                         local_flags |= LOCAL_TRUST_ACCOUNT;
 134                         break;
 135                 case 'i':
 136                         if (!amroot) goto bad_args;
 137                         local_flags |= LOCAL_INTERDOM_ACCOUNT;
 138                         break;
 139                 case 'j':
 140                         if (!amroot) goto bad_args;
 141                         d_printf("See 'net rpc join' for this functionality\n");
 142                         exit(1);
 143                         break;
 144                 case 'n':
 145                         if (!amroot) goto bad_args;
 146                         local_flags |= LOCAL_SET_NO_PASSWORD;
 147                         new_passwd = smb_xstrdup("NO PASSWORD");
 148                         break;
 149                 case 'r':
 150                         remote_machine = optarg;
 151                         break;
 152                 case 's':
 153                         set_line_buffering(stdin);
 154                         set_line_buffering(stdout);
 155                         set_line_buffering(stderr);
 156                         stdin_passwd_get = True;
 157                         break;
 158                 case 'w':
 159                         if (!amroot) goto bad_args;
 160 #ifdef WITH_LDAP_SAM
 161                         local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
 162                         fstrcpy(ldap_secret, optarg);
 163                         break;
 164 #else
 165                         printf("-w not available unless configured --with-ldap\n");
 166                         goto bad_args;
 167 #endif
 168                 case 'R':
 169                         if (!amroot) goto bad_args;
 170                         lp_set_name_resolve_order(optarg);
 171                         break;
 172                 case 'D':
 173                         DEBUGLEVEL = atoi(optarg);
 174                         break;
 175                 case 'U': {
 176                         char *lp;
 177
 178                         got_username = True;
 179                         fstrcpy(user_name, optarg);
 180
 181                         if ((lp = strchr(user_name, '%'))) {
 182                                 *lp = 0;
 183                                 fstrcpy(user_password, lp + 1);
 184                                 got_pass = True;
 185                                 memset(strchr_m(optarg, '%') + 1, 'X',
 186                                        strlen(user_password));
 187                         }
 188
 189                         break;
 190                 }
 191                 case 'h':
 192                 default:
 193 bad_args:
 194                         usage();
 195                 }
 196         }
 197
 198         argc -= optind;
 199         argv += optind;
 200
 201         switch(argc) {
 202         case 0:
 203                 if (!got_username)
 204                         fstrcpy(user_name, "");
 205                 break;
 206         case 1:
 207                 if (!amroot) {
 208                         new_passwd = argv[0];
 209                         break;
 210                 }
 211                 if (got_username)
 212                         usage();
 213                 fstrcpy(user_name, argv[0]);
 214                 break;
 215         case 2:
 216                 if (!amroot || got_username || got_pass)
 217                         usage();
 218                 fstrcpy(user_name, argv[0]);
 219                 new_passwd = smb_xstrdup(argv[1]);
 220                 break;
 221         default:
 222                 usage();
 223         }
 224
 225 }
 226
 227 /*************************************************************
 228  Utility function to prompt for passwords from stdin. Each
 229  password entered must end with a newline.
 230 *************************************************************/
 231 static char *stdin_new_passwd(void)
 232 {
 233         static fstring new_passwd;
 234         size_t len;
 235
 236         ZERO_ARRAY(new_passwd);
 237
 238         /*
 239          * if no error is reported from fgets() and string at least contains
 240          * the newline that ends the password, then replace the newline with
 241          * a null terminator.
 242          */
 243         if ( fgets(new_passwd, sizeof(new_passwd), stdin) != NULL) {
 244                 if ((len = strlen(new_passwd)) > 0) {
 245                         if(new_passwd[len-1] == '\n')
 246                                 new_passwd[len - 1] = 0;
 247                 }
 248         }
 249         return(new_passwd);
 250 }
 251
 252
 253 /*************************************************************
 254  Utility function to get passwords via tty or stdin
 255  Used if the '-s' option is set to silently get passwords
 256  to enable scripting.
 257 *************************************************************/
 258 static char *get_pass( char *prompt, BOOL stdin_get)
 259 {
 260         char *p;
 261         if (stdin_get) {
 262                 p = stdin_new_passwd();
 263         } else {
 264                 p = getpass(prompt);
 265         }
 266         return smb_xstrdup(p);
 267 }
 268
 269 /*************************************************************
 270  Utility function to prompt for new password.
 271 *************************************************************/
 272 static char *prompt_for_new_password(BOOL stdin_get)
 273 {
 274         char *p;
 275         fstring new_passwd;
 276
 277         ZERO_ARRAY(new_passwd);
 278
 279         p = get_pass("New SMB password:", stdin_get);
 280
 281         fstrcpy(new_passwd, p);
 282         SAFE_FREE(p);
 283
 284         p = get_pass("Retype new SMB password:", stdin_get);
 285
 286         if (strcmp(p, new_passwd)) {
 287                 fprintf(stderr, "Mismatch - password unchanged.\n");
 288                 ZERO_ARRAY(new_passwd);
 289                 SAFE_FREE(p);
 290                 return NULL;
 291         }
 292
 293         return p;
 294 }
 295
 296
 297 /*************************************************************
 298  Change a password either locally or remotely.
 299 *************************************************************/
 300
 301 static BOOL password_change(const char *remote_machine, char *user_name,
 302                             char *old_passwd, char *new_passwd, int local_flags)
 303 {
 304         BOOL ret;
 305         pstring err_str;
 306         pstring msg_str;
 307
 308         if (remote_machine != NULL) {
 309                 if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
 310                                                         LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
 311                         /* these things can't be done remotely yet */
 312                         return False;
 313                 }
 314                 ret = remote_password_change(remote_machine, user_name,
 315                                              old_passwd, new_passwd, err_str, sizeof(err_str));
 316                 if(*err_str)
 317                         fprintf(stderr, err_str);
 318                 return ret;
 319         }
 320
 321         ret = local_password_change(user_name, local_flags, new_passwd,
 322                                      err_str, sizeof(err_str), msg_str, sizeof(msg_str));
 323
 324         if(*msg_str)
 325                 printf(msg_str);
 326         if(*err_str)
 327                 fprintf(stderr, err_str);
 328
 329         return ret;
 330 }
 331
 332 #ifdef WITH_LDAP_SAM
 333 /*******************************************************************
 334  Store the LDAP admin password in secrets.tdb
 335  ******************************************************************/
 336 static BOOL store_ldap_admin_pw (char* pw)
 337 {
 338         if (!pw)
 339                 return False;
 340
 341         if (!secrets_init())
 342                 return False;
 343
 344         return secrets_store_ldap_pw(lp_ldap_admin_dn(), pw);
 345 }
 346 #endif
 347
 348
 349 /*************************************************************
 350  Handle password changing for root.
 351 *************************************************************/
 352
 353 static int process_root(void)
 354 {
 355         struct passwd  *pwd;
 356         int result = 0;
 357
 358 #ifdef WITH_LDAP_SAM
 359         if (local_flags & LOCAL_SET_LDAP_ADMIN_PW)
 360         {
 361                 printf("Setting stored password for \"%s\" in secrets.tdb\n",
 362                         lp_ldap_admin_dn());
 363                 if (!store_ldap_admin_pw(ldap_secret))
 364                         DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
 365                 goto done;
 366         }
 367 #endif
 368
 369         /*
 370          * Ensure both add/delete user are not set
 371          * Ensure add/delete user and either remote machine or join domain are
 372          * not both set.
 373          */
 374         if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
 375            ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
 376                 (remote_machine != NULL))) {
 377                 usage();
 378         }
 379
 380         /* Only load interfaces if we are doing network operations. */
 381
 382         if (remote_machine) {
 383                 load_interfaces();
 384         }
 385
 386         if (!user_name[0] && (pwd = sys_getpwuid(geteuid()))) {
 387                 fstrcpy(user_name, pwd->pw_name);
 388         }
 389
 390         if (!user_name[0]) {
 391                 fprintf(stderr,"You must specify a username\n");
 392                 exit(1);
 393         }
 394
 395         if (local_flags & LOCAL_TRUST_ACCOUNT) {
 396                 /* add the $ automatically */
 397                 static fstring buf;
 398
 399                 /*
 400                  * Remove any trailing '$' before we
 401                  * generate the initial machine password.
 402                  */
 403
 404                 if (user_name[strlen(user_name)-1] == '$') {
 405                         user_name[strlen(user_name)-1] = 0;
 406                 }
 407
 408                 if (local_flags & LOCAL_ADD_USER) {
 409                         SAFE_FREE(new_passwd);
 410                         new_passwd = smb_xstrdup(user_name);
 411                         strlower(new_passwd);
 412                 }
 413
 414                 /*
 415                  * Now ensure the username ends in '$' for
 416                  * the machine add.
 417                  */
 418
 419                 slprintf(buf, sizeof(buf)-1, "%s$", user_name);
 420                 fstrcpy(user_name, buf);
 421         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
 422                 static fstring buf;
 423
 424                 if (local_flags & LOCAL_ADD_USER) {
 425                         /*
 426                          * Prompt for trusting domain's account password
 427                          */
 428                         new_passwd = prompt_for_new_password(stdin_passwd_get);
 429                         if(!new_passwd) {
 430                                 fprintf(stderr, "Unable to get newpassword.\n");
 431                                 exit(1);
 432                         }
 433                 }
 434                 slprintf(buf, sizeof(buf) - 1, "%s$", user_name);
 435                 fstrcpy(user_name, buf);
 436
 437         } else {
 438
 439                 if (remote_machine != NULL) {
 440                         old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
 441                 }
 442
 443                 if (!(local_flags & LOCAL_SET_PASSWORD)) {
 444
 445                         /*
 446                          * If we are trying to enable a user, first we need to find out
 447                          * if they are using a modern version of the smbpasswd file that
 448                          * disables a user by just writing a flag into the file. If so
 449                          * then we can re-enable a user without prompting for a new
 450                          * password. If not (ie. they have a no stored password in the
 451                          * smbpasswd file) then we need to prompt for a new password.
 452                          */
 453
 454                         if(local_flags & LOCAL_ENABLE_USER) {
 455                                 SAM_ACCOUNT *sampass = NULL;
 456                                 BOOL ret;
 457
 458                                 pdb_init_sam(&sampass);
 459                                 ret = pdb_getsampwnam(sampass, user_name);
 460                                 if((sampass != False) && (pdb_get_lanman_passwd(sampass) == NULL)) {
 461                                         local_flags |= LOCAL_SET_PASSWORD;
 462                                 }
 463                                 pdb_free_sam(&sampass);
 464                         }
 465                 }
 466
 467                 if(local_flags & LOCAL_SET_PASSWORD) {
 468                         new_passwd = prompt_for_new_password(stdin_passwd_get);
 469
 470                         if(!new_passwd) {
 471                                 fprintf(stderr, "Unable to get new password.\n");
 472                                 exit(1);
 473                         }
 474                 }
 475         }
 476
 477         if (!password_change(remote_machine, user_name, old_passwd, new_passwd, local_flags)) {
 478                 fprintf(stderr,"Failed to modify password entry for user %s\n", user_name);
 479                 result = 1;
 480                 goto done;
 481         }
 482
 483         if(remote_machine) {
 484                 printf("Password changed for user %s on %s.\n", user_name, remote_machine );
 485         } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
 486                 SAM_ACCOUNT *sampass = NULL;
 487                 BOOL ret;
 488
 489                 pdb_init_sam(&sampass);
 490                 ret = pdb_getsampwnam(sampass, user_name);
 491
 492                 printf("Password changed for user %s.", user_name );
 493                 if( (ret != False) && (pdb_get_acct_ctrl(sampass)&ACB_DISABLED) )
 494                         printf(" User has disabled flag set.");
 495                 if((ret != False) && (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) )
 496                         printf(" User has no password flag set.");
 497                 printf("\n");
 498                 pdb_free_sam(&sampass);
 499         }
 500
 501  done:
 502         SAFE_FREE(new_passwd);
 503         return result;
 504 }
 505
 506
 507 /*************************************************************
 508  Handle password changing for non-root.
 509 *************************************************************/
 510
 511 static int process_nonroot(void)
 512 {
 513         struct passwd  *pwd = NULL;
 514         int result = 0;
 515
 516         if (!user_name[0]) {
 517                 pwd = sys_getpwuid(getuid());
 518                 if (pwd) {
 519                         fstrcpy(user_name,pwd->pw_name);
 520                 } else {
 521                         fprintf(stderr, "smbpasswd: you don't exist - go away\n");
 522                         exit(1);
 523                 }
 524         }
 525
 526         /*
 527          * A non-root user is always setting a password
 528          * via a remote machine (even if that machine is
 529          * localhost).
 530          */
 531
 532         load_interfaces(); /* Delayed from main() */
 533
 534         if (remote_machine == NULL) {
 535                 remote_machine = "127.0.0.1";
 536         }
 537
 538         if (remote_machine != NULL) {
 539                 old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
 540         }
 541
 542         if (!new_passwd) {
 543                 new_passwd = prompt_for_new_password(stdin_passwd_get);
 544         }
 545
 546         if (!new_passwd) {
 547                 fprintf(stderr, "Unable to get new password.\n");
 548                 exit(1);
 549         }
 550
 551         if (!password_change(remote_machine, user_name, old_passwd, new_passwd, 0)) {
 552                 fprintf(stderr,"Failed to change password for %s\n", user_name);
 553                 result = 1;
 554                 goto done;
 555         }
 556
 557         printf("Password changed for user %s\n", user_name);
 558
 559  done:
 560         SAFE_FREE(old_passwd);
 561         SAFE_FREE(new_passwd);
 562
 563         return result;
 564 }
 565
 566
 567
 568 /*********************************************************
 569  Start here.
 570 **********************************************************/
 571 int main(int argc, char **argv)
 572 {
 573         BOOL amroot = getuid() == 0;
 574
 575         pstrcpy(configfile, dyn_CONFIGFILE);
 576         AllowDebugChange = False;
 577
 578 #if defined(HAVE_SET_AUTH_PARAMETERS)
 579         set_auth_parameters(argc, argv);
 580 #endif /* HAVE_SET_AUTH_PARAMETERS */
 581
 582         process_options(argc, argv, amroot);
 583
 584         setup_logging("smbpasswd", True);
 585
 586         if (!lp_load(configfile,True,False,False)) {
 587                 fprintf(stderr, "Can't load %s - run testparm to debug it\n",
 588                         dyn_CONFIGFILE);
 589                 exit(1);
 590         }
 591
 592         /*
 593          * Set the machine NETBIOS name if not already
 594          * set from the config file.
 595          */
 596
 597         if (!*global_myname) {
 598                 char *p;
 599                 fstrcpy(global_myname, myhostname());
 600                 p = strchr_m(global_myname, '.' );
 601                 if (p) *p = 0;
 602         }
 603         strupper(global_myname);
 604
 605         /* Check the effective uid - make sure we are not setuid */
 606         if (is_setuid_root()) {
 607                 fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
 608                 exit(1);
 609         }
 610
 611         if (local_mode || amroot) {
 612                 secrets_init();
 613                 return process_root();
 614         }
 615
 616         return process_nonroot();
 617 }