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