1 /*- 2 * Copyright (C) 1996 3 * David L. Nugent. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #ifndef lint 29 static const char rcsid[] = 30 "$FreeBSD$"; 31 #endif /* not lint */ 32 33 #include <ctype.h> 34 #include <err.h> 35 #include <fcntl.h> 36 #include <sys/param.h> 37 #include <dirent.h> 38 #include <paths.h> 39 #include <termios.h> 40 #include <sys/types.h> 41 #include <sys/time.h> 42 #include <sys/resource.h> 43 #include <unistd.h> 44 #include <utmp.h> 45 #include <login_cap.h> 46 #include "pw.h" 47 #include "bitmap.h" 48 49 #if (MAXLOGNAME-1) > UT_NAMESIZE 50 #define LOGNAMESIZE UT_NAMESIZE 51 #else 52 #define LOGNAMESIZE (MAXLOGNAME-1) 53 #endif 54 55 static char locked_str[] = "*LOCKED*"; 56 57 static int print_user(struct passwd * pwd, int pretty, int v7); 58 static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args); 59 static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer); 60 static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 61 static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 62 static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 63 static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 64 static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user); 65 static char *shell_path(char const * path, char *shells[], char *sh); 66 static void rmat(uid_t uid); 67 static void rmopie(char const * name); 68 69 /*- 70 * -C config configuration file 71 * -q quiet operation 72 * -n name login name 73 * -u uid user id 74 * -c comment user name/comment 75 * -d directory home directory 76 * -e date account expiry date 77 * -p date password expiry date 78 * -g grp primary group 79 * -G grp1,grp2 additional groups 80 * -m [ -k dir ] create and set up home 81 * -s shell name of login shell 82 * -o duplicate uid ok 83 * -L class user class 84 * -l name new login name 85 * -h fd password filehandle 86 * -H fd encrypted password filehandle 87 * -F force print or add 88 * Setting defaults: 89 * -D set user defaults 90 * -b dir default home root dir 91 * -e period default expiry period 92 * -p period default password change period 93 * -g group default group 94 * -G grp1,grp2.. default additional groups 95 * -L class default login class 96 * -k dir default home skeleton 97 * -s shell default shell 98 * -w method default password method 99 */ 100 101 int 102 pw_user(struct userconf * cnf, int mode, struct cargs * args) 103 { 104 int rc, edited = 0; 105 char *p = NULL; 106 char *passtmp; 107 struct carg *a_name; 108 struct carg *a_uid; 109 struct carg *arg; 110 struct passwd *pwd = NULL; 111 struct group *grp; 112 struct stat st; 113 char line[_PASSWORD_LEN+1]; 114 FILE *fp; 115 mode_t dmode; 116 char *dmode_c; 117 void *set = NULL; 118 119 static struct passwd fakeuser = 120 { 121 NULL, 122 "*", 123 -1, 124 -1, 125 0, 126 "", 127 "User &", 128 "/nonexistent", 129 "/bin/sh", 130 0 131 #if defined(__FreeBSD__) 132 ,0 133 #endif 134 }; 135 136 137 /* 138 * With M_NEXT, we only need to return the 139 * next uid to stdout 140 */ 141 if (mode == M_NEXT) 142 { 143 uid_t next = pw_uidpolicy(cnf, args); 144 if (getarg(args, 'q')) 145 return next; 146 printf("%ld:", (long)next); 147 pw_group(cnf, mode, args); 148 return EXIT_SUCCESS; 149 } 150 151 /* 152 * We can do all of the common legwork here 153 */ 154 155 if ((arg = getarg(args, 'b')) != NULL) { 156 cnf->home = arg->val; 157 } 158 159 if ((arg = getarg(args, 'M')) != NULL) { 160 dmode_c = arg->val; 161 if ((set = setmode(dmode_c)) == NULL) 162 errx(EX_DATAERR, "invalid directory creation mode '%s'", 163 dmode_c); 164 dmode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO); 165 free(set); 166 cnf->homemode = dmode; 167 } 168 169 /* 170 * If we'll need to use it or we're updating it, 171 * then create the base home directory if necessary 172 */ 173 if (arg != NULL || getarg(args, 'm') != NULL) { 174 int l = strlen(cnf->home); 175 176 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 177 cnf->home[--l] = '\0'; 178 179 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 180 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 181 182 if (stat(cnf->home, &st) == -1) { 183 char dbuf[MAXPATHLEN]; 184 185 /* 186 * This is a kludge especially for Joerg :) 187 * If the home directory would be created in the root partition, then 188 * we really create it under /usr which is likely to have more space. 189 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 190 */ 191 if (strchr(cnf->home+1, '/') == NULL) { 192 strcpy(dbuf, "/usr"); 193 strncat(dbuf, cnf->home, MAXPATHLEN-5); 194 if (mkdir(dbuf, cnf->homemode) != -1 || errno == EEXIST) { 195 chown(dbuf, 0, 0); 196 /* 197 * Skip first "/" and create symlink: 198 * /home -> usr/home 199 */ 200 symlink(dbuf+1, cnf->home); 201 } 202 /* If this falls, fall back to old method */ 203 } 204 strlcpy(dbuf, cnf->home, sizeof(dbuf)); 205 p = dbuf; 206 if (stat(dbuf, &st) == -1) { 207 while ((p = strchr(++p, '/')) != NULL) { 208 *p = '\0'; 209 if (stat(dbuf, &st) == -1) { 210 if (mkdir(dbuf, cnf->homemode) == -1) 211 goto direrr; 212 chown(dbuf, 0, 0); 213 } else if (!S_ISDIR(st.st_mode)) 214 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 215 *p = '/'; 216 } 217 } 218 if (stat(dbuf, &st) == -1) { 219 if (mkdir(dbuf, cnf->homemode) == -1) { 220 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf); 221 } 222 chown(dbuf, 0, 0); 223 } 224 } else if (!S_ISDIR(st.st_mode)) 225 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 226 } 227 228 if ((arg = getarg(args, 'e')) != NULL) 229 cnf->expire_days = atoi(arg->val); 230 231 if ((arg = getarg(args, 'y')) != NULL) 232 cnf->nispasswd = arg->val; 233 234 if ((arg = getarg(args, 'p')) != NULL && arg->val) 235 cnf->password_days = atoi(arg->val); 236 237 if ((arg = getarg(args, 'g')) != NULL) { 238 if (!*(p = arg->val)) /* Handle empty group list specially */ 239 cnf->default_group = ""; 240 else { 241 if ((grp = GETGRNAM(p)) == NULL) { 242 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 243 errx(EX_NOUSER, "group `%s' does not exist", p); 244 } 245 cnf->default_group = newstr(grp->gr_name); 246 } 247 } 248 if ((arg = getarg(args, 'L')) != NULL) 249 cnf->default_class = pw_checkname((u_char *)arg->val, 0); 250 251 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 252 int i = 0; 253 254 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 255 if ((grp = GETGRNAM(p)) == NULL) { 256 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 257 errx(EX_NOUSER, "group `%s' does not exist", p); 258 } 259 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1) 260 cnf->groups[i++] = newstr(grp->gr_name); 261 } 262 while (i < cnf->numgroups) 263 cnf->groups[i++] = NULL; 264 } 265 266 if ((arg = getarg(args, 'k')) != NULL) { 267 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode)) 268 errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir); 269 } 270 271 if ((arg = getarg(args, 's')) != NULL) 272 cnf->shell_default = arg->val; 273 274 if ((arg = getarg(args, 'w')) != NULL) 275 cnf->default_password = boolean_val(arg->val, cnf->default_password); 276 if (mode == M_ADD && getarg(args, 'D')) { 277 if (getarg(args, 'n') != NULL) 278 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 279 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 280 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 281 cnf->min_uid = 1000; 282 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 283 cnf->max_uid = 32000; 284 } 285 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 286 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 287 cnf->min_gid = 1000; 288 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 289 cnf->max_gid = 32000; 290 } 291 292 arg = getarg(args, 'C'); 293 if (write_userconfig(arg ? arg->val : NULL)) 294 return EXIT_SUCCESS; 295 warn("config update"); 296 return EX_IOERR; 297 } 298 299 if (mode == M_PRINT && getarg(args, 'a')) { 300 int pretty = getarg(args, 'P') != NULL; 301 int v7 = getarg(args, '7') != NULL; 302 303 SETPWENT(); 304 while ((pwd = GETPWENT()) != NULL) 305 print_user(pwd, pretty, v7); 306 ENDPWENT(); 307 return EXIT_SUCCESS; 308 } 309 310 if ((a_name = getarg(args, 'n')) != NULL) 311 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0)); 312 a_uid = getarg(args, 'u'); 313 314 if (a_uid == NULL) { 315 if (a_name == NULL) 316 errx(EX_DATAERR, "user name or id required"); 317 318 /* 319 * Determine whether 'n' switch is name or uid - we don't 320 * really don't really care which we have, but we need to 321 * know. 322 */ 323 if (mode != M_ADD && pwd == NULL 324 && strspn(a_name->val, "0123456789") == strlen(a_name->val) 325 && atoi(a_name->val) > 0) { /* Assume uid */ 326 (a_uid = a_name)->ch = 'u'; 327 a_name = NULL; 328 } 329 } 330 331 /* 332 * Update, delete & print require that the user exists 333 */ 334 if (mode == M_UPDATE || mode == M_DELETE || 335 mode == M_PRINT || mode == M_LOCK || mode == M_UNLOCK) { 336 337 if (a_name == NULL && pwd == NULL) /* Try harder */ 338 pwd = GETPWUID(atoi(a_uid->val)); 339 340 if (pwd == NULL) { 341 if (mode == M_PRINT && getarg(args, 'F')) { 342 fakeuser.pw_name = a_name ? a_name->val : "nouser"; 343 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1; 344 return print_user(&fakeuser, 345 getarg(args, 'P') != NULL, 346 getarg(args, '7') != NULL); 347 } 348 if (a_name == NULL) 349 errx(EX_NOUSER, "no such uid `%s'", a_uid->val); 350 errx(EX_NOUSER, "no such user `%s'", a_name->val); 351 } 352 353 if (a_name == NULL) /* May be needed later */ 354 a_name = addarg(args, 'n', newstr(pwd->pw_name)); 355 356 /* 357 * The M_LOCK and M_UNLOCK functions simply add or remove 358 * a "*LOCKED*" prefix from in front of the password to 359 * prevent it decoding correctly, and therefore prevents 360 * access. Of course, this only prevents access via 361 * password authentication (not ssh, kerberos or any 362 * other method that does not use the UNIX password) but 363 * that is a known limitation. 364 */ 365 366 if (mode == M_LOCK) { 367 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0) 368 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name); 369 passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str)); 370 if (passtmp == NULL) /* disaster */ 371 errx(EX_UNAVAILABLE, "out of memory"); 372 strcpy(passtmp, locked_str); 373 strcat(passtmp, pwd->pw_passwd); 374 pwd->pw_passwd = passtmp; 375 edited = 1; 376 } else if (mode == M_UNLOCK) { 377 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0) 378 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name); 379 pwd->pw_passwd += sizeof(locked_str)-1; 380 edited = 1; 381 } else if (mode == M_DELETE) { 382 /* 383 * Handle deletions now 384 */ 385 char file[MAXPATHLEN]; 386 char home[MAXPATHLEN]; 387 uid_t uid = pwd->pw_uid; 388 389 if (strcmp(pwd->pw_name, "root") == 0) 390 errx(EX_DATAERR, "cannot remove user 'root'"); 391 392 if (!PWALTDIR()) { 393 /* 394 * Remove opie record from /etc/opiekeys 395 */ 396 397 rmopie(pwd->pw_name); 398 399 /* 400 * Remove crontabs 401 */ 402 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name); 403 if (access(file, F_OK) == 0) { 404 sprintf(file, "crontab -u %s -r", pwd->pw_name); 405 system(file); 406 } 407 } 408 /* 409 * Save these for later, since contents of pwd may be 410 * invalidated by deletion 411 */ 412 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 413 strlcpy(home, pwd->pw_dir, sizeof(home)); 414 415 rc = delpwent(pwd); 416 if (rc == -1) 417 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 418 else if (rc != 0) { 419 warn("passwd update"); 420 return EX_IOERR; 421 } 422 423 if (cnf->nispasswd && *cnf->nispasswd=='/') { 424 rc = delnispwent(cnf->nispasswd, a_name->val); 425 if (rc == -1) 426 warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name); 427 else if (rc != 0) 428 warn("WARNING: NIS passwd update"); 429 /* non-fatal */ 430 } 431 432 editgroups(a_name->val, NULL); 433 434 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid); 435 436 if (!PWALTDIR()) { 437 /* 438 * Remove mail file 439 */ 440 remove(file); 441 442 /* 443 * Remove at jobs 444 */ 445 if (getpwuid(uid) == NULL) 446 rmat(uid); 447 448 /* 449 * Remove home directory and contents 450 */ 451 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) { 452 if (stat(home, &st) != -1) { 453 rm_r(home, uid); 454 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved", 455 a_name->val, (long) uid, home, 456 stat(home, &st) == -1 ? "" : "not completely "); 457 } 458 } 459 } 460 return EXIT_SUCCESS; 461 } else if (mode == M_PRINT) 462 return print_user(pwd, 463 getarg(args, 'P') != NULL, 464 getarg(args, '7') != NULL); 465 466 /* 467 * The rest is edit code 468 */ 469 if ((arg = getarg(args, 'l')) != NULL) { 470 if (strcmp(pwd->pw_name, "root") == 0) 471 errx(EX_DATAERR, "can't rename `root' account"); 472 pwd->pw_name = pw_checkname((u_char *)arg->val, 0); 473 edited = 1; 474 } 475 476 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) { 477 pwd->pw_uid = (uid_t) atol(arg->val); 478 edited = 1; 479 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 480 errx(EX_DATAERR, "can't change uid of `root' account"); 481 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 482 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 483 } 484 485 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */ 486 gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 487 if (newgid != pwd->pw_gid) { 488 edited = 1; 489 pwd->pw_gid = newgid; 490 } 491 } 492 493 if ((arg = getarg(args, 'p')) != NULL) { 494 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 495 if (pwd->pw_change != 0) { 496 pwd->pw_change = 0; 497 edited = 1; 498 } 499 } 500 else { 501 time_t now = time(NULL); 502 time_t expire = parse_date(now, arg->val); 503 504 if (now == expire) 505 errx(EX_DATAERR, "invalid password change date `%s'", arg->val); 506 if (pwd->pw_change != expire) { 507 pwd->pw_change = expire; 508 edited = 1; 509 } 510 } 511 } 512 513 if ((arg = getarg(args, 'e')) != NULL) { 514 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 515 if (pwd->pw_expire != 0) { 516 pwd->pw_expire = 0; 517 edited = 1; 518 } 519 } 520 else { 521 time_t now = time(NULL); 522 time_t expire = parse_date(now, arg->val); 523 524 if (now == expire) 525 errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val); 526 if (pwd->pw_expire != expire) { 527 pwd->pw_expire = expire; 528 edited = 1; 529 } 530 } 531 } 532 533 if ((arg = getarg(args, 's')) != NULL) { 534 char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 535 if (shell == NULL) 536 shell = ""; 537 if (strcmp(shell, pwd->pw_shell) != 0) { 538 pwd->pw_shell = shell; 539 edited = 1; 540 } 541 } 542 543 if (getarg(args, 'L')) { 544 if (cnf->default_class == NULL) 545 cnf->default_class = ""; 546 if (strcmp(pwd->pw_class, cnf->default_class) != 0) { 547 pwd->pw_class = cnf->default_class; 548 edited = 1; 549 } 550 } 551 552 if ((arg = getarg(args, 'd')) != NULL) { 553 if (strcmp(pwd->pw_dir, arg->val)) 554 edited = 1; 555 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 556 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 557 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 558 } else if (!S_ISDIR(st.st_mode)) 559 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 560 } 561 562 if ((arg = getarg(args, 'w')) != NULL && 563 getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) { 564 login_cap_t *lc; 565 566 lc = login_getpwclass(pwd); 567 if (lc == NULL || 568 login_setcryptfmt(lc, "md5", NULL) == NULL) 569 warn("setting crypt(3) format"); 570 login_close(lc); 571 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 572 edited = 1; 573 } 574 575 } else { 576 login_cap_t *lc; 577 578 /* 579 * Add code 580 */ 581 582 if (a_name == NULL) /* Required */ 583 errx(EX_DATAERR, "login name required"); 584 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */ 585 errx(EX_DATAERR, "login name `%s' already exists", a_name->val); 586 587 /* 588 * Now, set up defaults for a new user 589 */ 590 pwd = &fakeuser; 591 pwd->pw_name = a_name->val; 592 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 593 pwd->pw_uid = pw_uidpolicy(cnf, args); 594 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid); 595 pwd->pw_change = pw_pwdpolicy(cnf, args); 596 pwd->pw_expire = pw_exppolicy(cnf, args); 597 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 598 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 599 lc = login_getpwclass(pwd); 600 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL) 601 warn("setting crypt(3) format"); 602 login_close(lc); 603 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 604 edited = 1; 605 606 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 607 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 608 } 609 610 /* 611 * Shared add/edit code 612 */ 613 if ((arg = getarg(args, 'c')) != NULL) { 614 char *gecos = pw_checkname((u_char *)arg->val, 1); 615 if (strcmp(pwd->pw_gecos, gecos) != 0) { 616 pwd->pw_gecos = gecos; 617 edited = 1; 618 } 619 } 620 621 if ((arg = getarg(args, 'h')) != NULL || 622 (arg = getarg(args, 'H')) != NULL) { 623 if (strcmp(arg->val, "-") == 0) { 624 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') { 625 pwd->pw_passwd = "*"; /* No access */ 626 edited = 1; 627 } 628 } else { 629 int fd = atoi(arg->val); 630 int precrypt = (arg->ch == 'H'); 631 int b; 632 int istty = isatty(fd); 633 struct termios t; 634 login_cap_t *lc; 635 636 if (istty) { 637 if (tcgetattr(fd, &t) == -1) 638 istty = 0; 639 else { 640 struct termios n = t; 641 642 /* Disable echo */ 643 n.c_lflag &= ~(ECHO); 644 tcsetattr(fd, TCSANOW, &n); 645 printf("%s%spassword for user %s:", 646 (mode == M_UPDATE) ? "new " : "", 647 precrypt ? "encrypted " : "", 648 pwd->pw_name); 649 fflush(stdout); 650 } 651 } 652 b = read(fd, line, sizeof(line) - 1); 653 if (istty) { /* Restore state */ 654 tcsetattr(fd, TCSANOW, &t); 655 fputc('\n', stdout); 656 fflush(stdout); 657 } 658 if (b < 0) { 659 warn("-%c file descriptor", precrypt ? 'H' : 660 'h'); 661 return EX_IOERR; 662 } 663 line[b] = '\0'; 664 if ((p = strpbrk(line, "\r\n")) != NULL) 665 *p = '\0'; 666 if (!*line) 667 errx(EX_DATAERR, "empty password read on file descriptor %d", fd); 668 if (precrypt) { 669 if (strchr(line, ':') != NULL) 670 return EX_DATAERR; 671 pwd->pw_passwd = line; 672 } else { 673 lc = login_getpwclass(pwd); 674 if (lc == NULL || 675 login_setcryptfmt(lc, "md5", NULL) == NULL) 676 warn("setting crypt(3) format"); 677 login_close(lc); 678 pwd->pw_passwd = pw_pwcrypt(line); 679 } 680 edited = 1; 681 } 682 } 683 684 /* 685 * Special case: -N only displays & exits 686 */ 687 if (getarg(args, 'N') != NULL) 688 return print_user(pwd, 689 getarg(args, 'P') != NULL, 690 getarg(args, '7') != NULL); 691 692 if (mode == M_ADD) { 693 edited = 1; /* Always */ 694 rc = addpwent(pwd); 695 if (rc == -1) { 696 warnx("user '%s' already exists", pwd->pw_name); 697 return EX_IOERR; 698 } else if (rc != 0) { 699 warn("passwd file update"); 700 return EX_IOERR; 701 } 702 if (cnf->nispasswd && *cnf->nispasswd=='/') { 703 rc = addnispwent(cnf->nispasswd, pwd); 704 if (rc == -1) 705 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 706 else 707 warn("NIS passwd update"); 708 /* NOTE: we treat NIS-only update errors as non-fatal */ 709 } 710 } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) { 711 if (edited) { /* Only updated this if required */ 712 rc = chgpwent(a_name->val, pwd); 713 if (rc == -1) { 714 warnx("user '%s' does not exist (NIS?)", pwd->pw_name); 715 return EX_IOERR; 716 } else if (rc != 0) { 717 warn("passwd file update"); 718 return EX_IOERR; 719 } 720 if ( cnf->nispasswd && *cnf->nispasswd=='/') { 721 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd); 722 if (rc == -1) 723 warn("User '%s' not found in NIS passwd", pwd->pw_name); 724 else 725 warn("NIS passwd update"); 726 /* NOTE: NIS-only update errors are not fatal */ 727 } 728 } 729 } 730 731 /* 732 * Ok, user is created or changed - now edit group file 733 */ 734 735 if (mode == M_ADD || getarg(args, 'G') != NULL) 736 editgroups(pwd->pw_name, cnf->groups); 737 738 /* go get a current version of pwd */ 739 pwd = GETPWNAM(a_name->val); 740 if (pwd == NULL) { 741 /* This will fail when we rename, so special case that */ 742 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) { 743 a_name->val = arg->val; /* update new name */ 744 pwd = GETPWNAM(a_name->val); /* refetch renamed rec */ 745 } 746 } 747 if (pwd == NULL) /* can't go on without this */ 748 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val); 749 750 grp = GETGRGID(pwd->pw_gid); 751 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s", 752 pwd->pw_name, (long) pwd->pw_uid, 753 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1), 754 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 755 756 /* 757 * If adding, let's touch and chown the user's mail file. This is not 758 * strictly necessary under BSD with a 0755 maildir but it also 759 * doesn't hurt anything to create the empty mailfile 760 */ 761 if (mode == M_ADD) { 762 if (!PWALTDIR()) { 763 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 764 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 765 * mtime */ 766 chown(line, pwd->pw_uid, pwd->pw_gid); 767 } 768 } 769 770 /* 771 * Let's create and populate the user's home directory. Note 772 * that this also `works' for editing users if -m is used, but 773 * existing files will *not* be overwritten. 774 */ 775 if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) { 776 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid); 777 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made", 778 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir); 779 } 780 781 782 /* 783 * Finally, send mail to the new user as well, if we are asked to 784 */ 785 if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 786 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 787 788 if (pfp == NULL) 789 warn("sendmail"); 790 else { 791 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 792 while (fgets(line, sizeof(line), fp) != NULL) { 793 /* Do substitutions? */ 794 fputs(line, pfp); 795 } 796 pclose(pfp); 797 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent", 798 pwd->pw_name, (long) pwd->pw_uid); 799 } 800 fclose(fp); 801 } 802 803 return EXIT_SUCCESS; 804 } 805 806 807 static uid_t 808 pw_uidpolicy(struct userconf * cnf, struct cargs * args) 809 { 810 struct passwd *pwd; 811 uid_t uid = (uid_t) - 1; 812 struct carg *a_uid = getarg(args, 'u'); 813 814 /* 815 * Check the given uid, if any 816 */ 817 if (a_uid != NULL) { 818 uid = (uid_t) atol(a_uid->val); 819 820 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL) 821 errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid); 822 } else { 823 struct bitmap bm; 824 825 /* 826 * We need to allocate the next available uid under one of 827 * two policies a) Grab the first unused uid b) Grab the 828 * highest possible unused uid 829 */ 830 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 831 * claus^H^H^H^Hheck */ 832 cnf->min_uid = 1000; 833 cnf->max_uid = 32000; 834 } 835 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 836 837 /* 838 * Now, let's fill the bitmap from the password file 839 */ 840 SETPWENT(); 841 while ((pwd = GETPWENT()) != NULL) 842 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 843 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 844 ENDPWENT(); 845 846 /* 847 * Then apply the policy, with fallback to reuse if necessary 848 */ 849 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 850 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 851 852 /* 853 * Another sanity check 854 */ 855 if (uid < cnf->min_uid || uid > cnf->max_uid) 856 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 857 bm_dealloc(&bm); 858 } 859 return uid; 860 } 861 862 863 static uid_t 864 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer) 865 { 866 struct group *grp; 867 gid_t gid = (uid_t) - 1; 868 struct carg *a_gid = getarg(args, 'g'); 869 870 /* 871 * If no arg given, see if default can help out 872 */ 873 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 874 a_gid = addarg(args, 'g', cnf->default_group); 875 876 /* 877 * Check the given gid, if any 878 */ 879 SETGRENT(); 880 if (a_gid != NULL) { 881 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 882 gid = (gid_t) atol(a_gid->val); 883 if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 884 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 885 } 886 gid = grp->gr_gid; 887 } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) { 888 gid = grp->gr_gid; /* Already created? Use it anyway... */ 889 } else { 890 struct cargs grpargs; 891 char tmp[32]; 892 893 LIST_INIT(&grpargs); 894 addarg(&grpargs, 'n', nam); 895 896 /* 897 * We need to auto-create a group with the user's name. We 898 * can send all the appropriate output to our sister routine 899 * bit first see if we can create a group with gid==uid so we 900 * can keep the user and group ids in sync. We purposely do 901 * NOT check the gid range if we can force the sync. If the 902 * user's name dups an existing group, then the group add 903 * function will happily handle that case for us and exit. 904 */ 905 if (GETGRGID(prefer) == NULL) { 906 sprintf(tmp, "%lu", (unsigned long) prefer); 907 addarg(&grpargs, 'g', tmp); 908 } 909 if (getarg(args, 'N')) 910 { 911 addarg(&grpargs, 'N', NULL); 912 addarg(&grpargs, 'q', NULL); 913 gid = pw_group(cnf, M_NEXT, &grpargs); 914 } 915 else 916 { 917 pw_group(cnf, M_ADD, &grpargs); 918 if ((grp = GETGRNAM(nam)) != NULL) 919 gid = grp->gr_gid; 920 } 921 a_gid = LIST_FIRST(&grpargs); 922 while (a_gid != NULL) { 923 struct carg *t = LIST_NEXT(a_gid, list); 924 LIST_REMOVE(a_gid, list); 925 a_gid = t; 926 } 927 } 928 ENDGRENT(); 929 return gid; 930 } 931 932 933 static time_t 934 pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 935 { 936 time_t result = 0; 937 time_t now = time(NULL); 938 struct carg *arg = getarg(args, 'p'); 939 940 if (arg != NULL) { 941 if ((result = parse_date(now, arg->val)) == now) 942 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 943 } else if (cnf->password_days > 0) 944 result = now + ((long) cnf->password_days * 86400L); 945 return result; 946 } 947 948 949 static time_t 950 pw_exppolicy(struct userconf * cnf, struct cargs * args) 951 { 952 time_t result = 0; 953 time_t now = time(NULL); 954 struct carg *arg = getarg(args, 'e'); 955 956 if (arg != NULL) { 957 if ((result = parse_date(now, arg->val)) == now) 958 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 959 } else if (cnf->expire_days > 0) 960 result = now + ((long) cnf->expire_days * 86400L); 961 return result; 962 } 963 964 965 static char * 966 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 967 { 968 struct carg *arg = getarg(args, 'd'); 969 970 if (arg) 971 return arg->val; 972 else { 973 static char home[128]; 974 975 if (cnf->home == NULL || *cnf->home == '\0') 976 errx(EX_CONFIG, "no base home directory set"); 977 sprintf(home, "%s/%s", cnf->home, user); 978 return home; 979 } 980 } 981 982 static char * 983 shell_path(char const * path, char *shells[], char *sh) 984 { 985 if (sh != NULL && (*sh == '/' || *sh == '\0')) 986 return sh; /* specified full path or forced none */ 987 else { 988 char *p; 989 char paths[_UC_MAXLINE]; 990 991 /* 992 * We need to search paths 993 */ 994 strlcpy(paths, path, sizeof(paths)); 995 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 996 int i; 997 static char shellpath[256]; 998 999 if (sh != NULL) { 1000 sprintf(shellpath, "%s/%s", p, sh); 1001 if (access(shellpath, X_OK) == 0) 1002 return shellpath; 1003 } else 1004 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 1005 sprintf(shellpath, "%s/%s", p, shells[i]); 1006 if (access(shellpath, X_OK) == 0) 1007 return shellpath; 1008 } 1009 } 1010 if (sh == NULL) 1011 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 1012 errx(EX_CONFIG, "no default shell available or defined"); 1013 return NULL; 1014 } 1015 } 1016 1017 1018 static char * 1019 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 1020 { 1021 char *sh = newshell; 1022 struct carg *arg = getarg(args, 's'); 1023 1024 if (newshell == NULL && arg != NULL) 1025 sh = arg->val; 1026 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 1027 } 1028 1029 #define SALTSIZE 32 1030 1031 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./"; 1032 1033 char * 1034 pw_pwcrypt(char *password) 1035 { 1036 int i; 1037 char salt[SALTSIZE + 1]; 1038 1039 static char buf[256]; 1040 1041 /* 1042 * Calculate a salt value 1043 */ 1044 for (i = 0; i < SALTSIZE; i++) 1045 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)]; 1046 salt[SALTSIZE] = '\0'; 1047 1048 return strcpy(buf, crypt(password, salt)); 1049 } 1050 1051 1052 static char * 1053 pw_password(struct userconf * cnf, struct cargs * args, char const * user) 1054 { 1055 int i, l; 1056 char pwbuf[32]; 1057 1058 switch (cnf->default_password) { 1059 case -1: /* Random password */ 1060 l = (arc4random() % 8 + 8); /* 8 - 16 chars */ 1061 for (i = 0; i < l; i++) 1062 pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)]; 1063 pwbuf[i] = '\0'; 1064 1065 /* 1066 * We give this information back to the user 1067 */ 1068 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL && 1069 getarg(args, 'N') == NULL) { 1070 if (isatty(STDOUT_FILENO)) 1071 printf("Password for '%s' is: ", user); 1072 printf("%s\n", pwbuf); 1073 fflush(stdout); 1074 } 1075 break; 1076 1077 case -2: /* No password at all! */ 1078 return ""; 1079 1080 case 0: /* No login - default */ 1081 default: 1082 return "*"; 1083 1084 case 1: /* user's name */ 1085 strlcpy(pwbuf, user, sizeof(pwbuf)); 1086 break; 1087 } 1088 return pw_pwcrypt(pwbuf); 1089 } 1090 1091 1092 static int 1093 print_user(struct passwd * pwd, int pretty, int v7) 1094 { 1095 if (!pretty) { 1096 char buf[_UC_MAXLINE]; 1097 1098 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD); 1099 fputs(buf, stdout); 1100 } else { 1101 int j; 1102 char *p; 1103 struct group *grp = GETGRGID(pwd->pw_gid); 1104 char uname[60] = "User &", office[60] = "[None]", 1105 wphone[60] = "[None]", hphone[60] = "[None]"; 1106 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1107 struct tm * tptr; 1108 1109 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1110 strlcpy(uname, p, sizeof(uname)); 1111 if ((p = strtok(NULL, ",")) != NULL) { 1112 strlcpy(office, p, sizeof(office)); 1113 if ((p = strtok(NULL, ",")) != NULL) { 1114 strlcpy(wphone, p, sizeof(wphone)); 1115 if ((p = strtok(NULL, "")) != NULL) { 1116 strlcpy(hphone, p, 1117 sizeof(hphone)); 1118 } 1119 } 1120 } 1121 } 1122 /* 1123 * Handle '&' in gecos field 1124 */ 1125 if ((p = strchr(uname, '&')) != NULL) { 1126 int l = strlen(pwd->pw_name); 1127 int m = strlen(p); 1128 1129 memmove(p + l, p + 1, m); 1130 memmove(p, pwd->pw_name, l); 1131 *p = (char) toupper((unsigned char)*p); 1132 } 1133 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1134 strftime(acexpire, sizeof acexpire, "%c", tptr); 1135 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 1136 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 1137 printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n" 1138 " Full Name: %s\n" 1139 " Home: %-26.26s Class: %s\n" 1140 " Shell: %-26.26s Office: %s\n" 1141 "Work Phone: %-26.26s Home Phone: %s\n" 1142 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1143 pwd->pw_name, (long) pwd->pw_uid, 1144 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid, 1145 uname, pwd->pw_dir, pwd->pw_class, 1146 pwd->pw_shell, office, wphone, hphone, 1147 acexpire, pwexpire); 1148 SETGRENT(); 1149 j = 0; 1150 while ((grp=GETGRENT()) != NULL) 1151 { 1152 int i = 0; 1153 while (grp->gr_mem[i] != NULL) 1154 { 1155 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1156 { 1157 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1158 break; 1159 } 1160 ++i; 1161 } 1162 } 1163 ENDGRENT(); 1164 printf("%s", j ? "\n" : ""); 1165 } 1166 return EXIT_SUCCESS; 1167 } 1168 1169 char * 1170 pw_checkname(u_char *name, int gecos) 1171 { 1172 char showch[8]; 1173 u_char const *badchars, *ch, *showtype; 1174 int reject; 1175 1176 ch = name; 1177 reject = 0; 1178 if (gecos) { 1179 /* See if the name is valid as a gecos (comment) field. */ 1180 badchars = ":!@"; 1181 showtype = "gecos field"; 1182 } else { 1183 /* See if the name is valid as a userid or group. */ 1184 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\""; 1185 showtype = "userid/group name"; 1186 /* Userids and groups can not have a leading '-'. */ 1187 if (*ch == '-') 1188 reject = 1; 1189 } 1190 if (!reject) { 1191 while (*ch) { 1192 if (strchr(badchars, *ch) != NULL || *ch < ' ' || 1193 *ch == 127) { 1194 reject = 1; 1195 break; 1196 } 1197 /* 8-bit characters are only allowed in GECOS fields */ 1198 if (!gecos && (*ch & 0x80)) { 1199 reject = 1; 1200 break; 1201 } 1202 ch++; 1203 } 1204 } 1205 /* 1206 * A `$' is allowed as the final character for userids and groups, 1207 * mainly for the benefit of samba. 1208 */ 1209 if (reject && !gecos) { 1210 if (*ch == '$' && *(ch + 1) == '\0') { 1211 reject = 0; 1212 ch++; 1213 } 1214 } 1215 if (reject) { 1216 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127) 1217 ? "`%c'" : "0x%02x", *ch); 1218 errx(EX_DATAERR, "invalid character %s at position %d in %s", 1219 showch, (ch - name), showtype); 1220 } 1221 if (!gecos && (ch - name) > LOGNAMESIZE) 1222 errx(EX_DATAERR, "name too long `%s' (max is %d)", name, 1223 LOGNAMESIZE); 1224 return (char *)name; 1225 } 1226 1227 1228 static void 1229 rmat(uid_t uid) 1230 { 1231 DIR *d = opendir("/var/at/jobs"); 1232 1233 if (d != NULL) { 1234 struct dirent *e; 1235 1236 while ((e = readdir(d)) != NULL) { 1237 struct stat st; 1238 1239 if (strncmp(e->d_name, ".lock", 5) != 0 && 1240 stat(e->d_name, &st) == 0 && 1241 !S_ISDIR(st.st_mode) && 1242 st.st_uid == uid) { 1243 char tmp[MAXPATHLEN]; 1244 1245 sprintf(tmp, "/usr/bin/atrm %s", e->d_name); 1246 system(tmp); 1247 } 1248 } 1249 closedir(d); 1250 } 1251 } 1252 1253 static void 1254 rmopie(char const * name) 1255 { 1256 static const char etcopie[] = "/etc/opiekeys"; 1257 FILE *fp = fopen(etcopie, "r+"); 1258 1259 if (fp != NULL) { 1260 char tmp[1024]; 1261 off_t atofs = 0; 1262 int length = strlen(name); 1263 1264 while (fgets(tmp, sizeof tmp, fp) != NULL) { 1265 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') { 1266 if (fseek(fp, atofs, SEEK_SET) == 0) { 1267 fwrite("#", 1, 1, fp); /* Comment username out */ 1268 } 1269 break; 1270 } 1271 atofs = ftell(fp); 1272 } 1273 /* 1274 * If we got an error of any sort, don't update! 1275 */ 1276 fclose(fp); 1277 } 1278 } 1279 1280