pw_user.c revision 267654
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 29static const char rcsid[] = 30 "$FreeBSD: releng/9.3/usr.sbin/pw/pw_user.c 253157 2013-07-10 14:16:39Z des $"; 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 <login_cap.h> 45#include "pw.h" 46#include "bitmap.h" 47 48#define LOGNAMESIZE (MAXLOGNAME-1) 49 50static char locked_str[] = "*LOCKED*"; 51 52static int print_user(struct passwd * pwd, int pretty, int v7); 53static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args); 54static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer); 55static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 56static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 57static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 58static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 59static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user); 60static char *shell_path(char const * path, char *shells[], char *sh); 61static void rmat(uid_t uid); 62static void rmopie(char const * name); 63 64/*- 65 * -C config configuration file 66 * -q quiet operation 67 * -n name login name 68 * -u uid user id 69 * -c comment user name/comment 70 * -d directory home directory 71 * -e date account expiry date 72 * -p date password expiry date 73 * -g grp primary group 74 * -G grp1,grp2 additional groups 75 * -m [ -k dir ] create and set up home 76 * -s shell name of login shell 77 * -o duplicate uid ok 78 * -L class user class 79 * -l name new login name 80 * -h fd password filehandle 81 * -H fd encrypted password filehandle 82 * -F force print or add 83 * Setting defaults: 84 * -D set user defaults 85 * -b dir default home root dir 86 * -e period default expiry period 87 * -p period default password change period 88 * -g group default group 89 * -G grp1,grp2.. default additional groups 90 * -L class default login class 91 * -k dir default home skeleton 92 * -s shell default shell 93 * -w method default password method 94 */ 95 96int 97pw_user(struct userconf * cnf, int mode, struct cargs * args) 98{ 99 int rc, edited = 0; 100 char *p = NULL; 101 char *passtmp; 102 struct carg *a_name; 103 struct carg *a_uid; 104 struct carg *arg; 105 struct passwd *pwd = NULL; 106 struct group *grp; 107 struct stat st; 108 char line[_PASSWORD_LEN+1]; 109 FILE *fp; 110 char *dmode_c; 111 void *set = NULL; 112 113 static struct passwd fakeuser = 114 { 115 NULL, 116 "*", 117 -1, 118 -1, 119 0, 120 "", 121 "User &", 122 "/nonexistent", 123 "/bin/sh", 124 0 125#if defined(__FreeBSD__) 126 ,0 127#endif 128 }; 129 130 131 /* 132 * With M_NEXT, we only need to return the 133 * next uid to stdout 134 */ 135 if (mode == M_NEXT) 136 { 137 uid_t next = pw_uidpolicy(cnf, args); 138 if (getarg(args, 'q')) 139 return next; 140 printf("%ld:", (long)next); 141 pw_group(cnf, mode, args); 142 return EXIT_SUCCESS; 143 } 144 145 /* 146 * We can do all of the common legwork here 147 */ 148 149 if ((arg = getarg(args, 'b')) != NULL) { 150 cnf->home = arg->val; 151 } 152 153 if ((arg = getarg(args, 'M')) != NULL) { 154 dmode_c = arg->val; 155 if ((set = setmode(dmode_c)) == NULL) 156 errx(EX_DATAERR, "invalid directory creation mode '%s'", 157 dmode_c); 158 cnf->homemode = getmode(set, _DEF_DIRMODE); 159 free(set); 160 } 161 162 /* 163 * If we'll need to use it or we're updating it, 164 * then create the base home directory if necessary 165 */ 166 if (arg != NULL || getarg(args, 'm') != NULL) { 167 int l = strlen(cnf->home); 168 169 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 170 cnf->home[--l] = '\0'; 171 172 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 173 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 174 175 if (stat(cnf->home, &st) == -1) { 176 char dbuf[MAXPATHLEN]; 177 178 /* 179 * This is a kludge especially for Joerg :) 180 * If the home directory would be created in the root partition, then 181 * we really create it under /usr which is likely to have more space. 182 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 183 */ 184 if (strchr(cnf->home+1, '/') == NULL) { 185 strcpy(dbuf, "/usr"); 186 strncat(dbuf, cnf->home, MAXPATHLEN-5); 187 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) { 188 chown(dbuf, 0, 0); 189 /* 190 * Skip first "/" and create symlink: 191 * /home -> usr/home 192 */ 193 symlink(dbuf+1, cnf->home); 194 } 195 /* If this falls, fall back to old method */ 196 } 197 strlcpy(dbuf, cnf->home, sizeof(dbuf)); 198 p = dbuf; 199 if (stat(dbuf, &st) == -1) { 200 while ((p = strchr(++p, '/')) != NULL) { 201 *p = '\0'; 202 if (stat(dbuf, &st) == -1) { 203 if (mkdir(dbuf, _DEF_DIRMODE) == -1) 204 goto direrr; 205 chown(dbuf, 0, 0); 206 } else if (!S_ISDIR(st.st_mode)) 207 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 208 *p = '/'; 209 } 210 } 211 if (stat(dbuf, &st) == -1) { 212 if (mkdir(dbuf, _DEF_DIRMODE) == -1) { 213 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf); 214 } 215 chown(dbuf, 0, 0); 216 } 217 } else if (!S_ISDIR(st.st_mode)) 218 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 219 } 220 221 if ((arg = getarg(args, 'e')) != NULL) 222 cnf->expire_days = atoi(arg->val); 223 224 if ((arg = getarg(args, 'y')) != NULL) 225 cnf->nispasswd = arg->val; 226 227 if ((arg = getarg(args, 'p')) != NULL && arg->val) 228 cnf->password_days = atoi(arg->val); 229 230 if ((arg = getarg(args, 'g')) != NULL) { 231 if (!*(p = arg->val)) /* Handle empty group list specially */ 232 cnf->default_group = ""; 233 else { 234 if ((grp = GETGRNAM(p)) == NULL) { 235 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 236 errx(EX_NOUSER, "group `%s' does not exist", p); 237 } 238 cnf->default_group = newstr(grp->gr_name); 239 } 240 } 241 if ((arg = getarg(args, 'L')) != NULL) 242 cnf->default_class = pw_checkname((u_char *)arg->val, 0); 243 244 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 245 int i = 0; 246 247 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 248 if ((grp = GETGRNAM(p)) == NULL) { 249 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 250 errx(EX_NOUSER, "group `%s' does not exist", p); 251 } 252 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1) 253 cnf->groups[i++] = newstr(grp->gr_name); 254 } 255 while (i < cnf->numgroups) 256 cnf->groups[i++] = NULL; 257 } 258 259 if ((arg = getarg(args, 'k')) != NULL) { 260 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode)) 261 errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir); 262 } 263 264 if ((arg = getarg(args, 's')) != NULL) 265 cnf->shell_default = arg->val; 266 267 if ((arg = getarg(args, 'w')) != NULL) 268 cnf->default_password = boolean_val(arg->val, cnf->default_password); 269 if (mode == M_ADD && getarg(args, 'D')) { 270 if (getarg(args, 'n') != NULL) 271 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 272 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 273 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 274 cnf->min_uid = 1000; 275 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 276 cnf->max_uid = 32000; 277 } 278 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 279 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 280 cnf->min_gid = 1000; 281 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 282 cnf->max_gid = 32000; 283 } 284 285 arg = getarg(args, 'C'); 286 if (write_userconfig(arg ? arg->val : NULL)) 287 return EXIT_SUCCESS; 288 warn("config update"); 289 return EX_IOERR; 290 } 291 292 if (mode == M_PRINT && getarg(args, 'a')) { 293 int pretty = getarg(args, 'P') != NULL; 294 int v7 = getarg(args, '7') != NULL; 295 296 SETPWENT(); 297 while ((pwd = GETPWENT()) != NULL) 298 print_user(pwd, pretty, v7); 299 ENDPWENT(); 300 return EXIT_SUCCESS; 301 } 302 303 if ((a_name = getarg(args, 'n')) != NULL) 304 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0)); 305 a_uid = getarg(args, 'u'); 306 307 if (a_uid == NULL) { 308 if (a_name == NULL) 309 errx(EX_DATAERR, "user name or id required"); 310 311 /* 312 * Determine whether 'n' switch is name or uid - we don't 313 * really don't really care which we have, but we need to 314 * know. 315 */ 316 if (mode != M_ADD && pwd == NULL 317 && strspn(a_name->val, "0123456789") == strlen(a_name->val) 318 && *a_name->val) { 319 (a_uid = a_name)->ch = 'u'; 320 a_name = NULL; 321 } 322 } 323 324 /* 325 * Update, delete & print require that the user exists 326 */ 327 if (mode == M_UPDATE || mode == M_DELETE || 328 mode == M_PRINT || mode == M_LOCK || mode == M_UNLOCK) { 329 330 if (a_name == NULL && pwd == NULL) /* Try harder */ 331 pwd = GETPWUID(atoi(a_uid->val)); 332 333 if (pwd == NULL) { 334 if (mode == M_PRINT && getarg(args, 'F')) { 335 fakeuser.pw_name = a_name ? a_name->val : "nouser"; 336 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1; 337 return print_user(&fakeuser, 338 getarg(args, 'P') != NULL, 339 getarg(args, '7') != NULL); 340 } 341 if (a_name == NULL) 342 errx(EX_NOUSER, "no such uid `%s'", a_uid->val); 343 errx(EX_NOUSER, "no such user `%s'", a_name->val); 344 } 345 346 if (a_name == NULL) /* May be needed later */ 347 a_name = addarg(args, 'n', newstr(pwd->pw_name)); 348 349 /* 350 * The M_LOCK and M_UNLOCK functions simply add or remove 351 * a "*LOCKED*" prefix from in front of the password to 352 * prevent it decoding correctly, and therefore prevents 353 * access. Of course, this only prevents access via 354 * password authentication (not ssh, kerberos or any 355 * other method that does not use the UNIX password) but 356 * that is a known limitation. 357 */ 358 359 if (mode == M_LOCK) { 360 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0) 361 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name); 362 passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str)); 363 if (passtmp == NULL) /* disaster */ 364 errx(EX_UNAVAILABLE, "out of memory"); 365 strcpy(passtmp, locked_str); 366 strcat(passtmp, pwd->pw_passwd); 367 pwd->pw_passwd = passtmp; 368 edited = 1; 369 } else if (mode == M_UNLOCK) { 370 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0) 371 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name); 372 pwd->pw_passwd += sizeof(locked_str)-1; 373 edited = 1; 374 } else if (mode == M_DELETE) { 375 /* 376 * Handle deletions now 377 */ 378 char file[MAXPATHLEN]; 379 char home[MAXPATHLEN]; 380 uid_t uid = pwd->pw_uid; 381 382 if (strcmp(pwd->pw_name, "root") == 0) 383 errx(EX_DATAERR, "cannot remove user 'root'"); 384 385 if (!PWALTDIR()) { 386 /* 387 * Remove opie record from /etc/opiekeys 388 */ 389 390 rmopie(pwd->pw_name); 391 392 /* 393 * Remove crontabs 394 */ 395 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name); 396 if (access(file, F_OK) == 0) { 397 sprintf(file, "crontab -u %s -r", pwd->pw_name); 398 system(file); 399 } 400 } 401 /* 402 * Save these for later, since contents of pwd may be 403 * invalidated by deletion 404 */ 405 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 406 strlcpy(home, pwd->pw_dir, sizeof(home)); 407 408 rc = delpwent(pwd); 409 if (rc == -1) 410 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 411 else if (rc != 0) { 412 warn("passwd update"); 413 return EX_IOERR; 414 } 415 416 if (cnf->nispasswd && *cnf->nispasswd=='/') { 417 rc = delnispwent(cnf->nispasswd, a_name->val); 418 if (rc == -1) 419 warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name); 420 else if (rc != 0) 421 warn("WARNING: NIS passwd update"); 422 /* non-fatal */ 423 } 424 425 editgroups(a_name->val, NULL); 426 427 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid); 428 429 if (!PWALTDIR()) { 430 /* 431 * Remove mail file 432 */ 433 remove(file); 434 435 /* 436 * Remove at jobs 437 */ 438 if (getpwuid(uid) == NULL) 439 rmat(uid); 440 441 /* 442 * Remove home directory and contents 443 */ 444 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) { 445 if (stat(home, &st) != -1) { 446 rm_r(home, uid); 447 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved", 448 a_name->val, (long) uid, home, 449 stat(home, &st) == -1 ? "" : "not completely "); 450 } 451 } 452 } 453 return EXIT_SUCCESS; 454 } else if (mode == M_PRINT) 455 return print_user(pwd, 456 getarg(args, 'P') != NULL, 457 getarg(args, '7') != NULL); 458 459 /* 460 * The rest is edit code 461 */ 462 if ((arg = getarg(args, 'l')) != NULL) { 463 if (strcmp(pwd->pw_name, "root") == 0) 464 errx(EX_DATAERR, "can't rename `root' account"); 465 pwd->pw_name = pw_checkname((u_char *)arg->val, 0); 466 edited = 1; 467 } 468 469 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) { 470 pwd->pw_uid = (uid_t) atol(arg->val); 471 edited = 1; 472 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 473 errx(EX_DATAERR, "can't change uid of `root' account"); 474 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 475 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 476 } 477 478 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */ 479 gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 480 if (newgid != pwd->pw_gid) { 481 edited = 1; 482 pwd->pw_gid = newgid; 483 } 484 } 485 486 if ((arg = getarg(args, 'p')) != NULL) { 487 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 488 if (pwd->pw_change != 0) { 489 pwd->pw_change = 0; 490 edited = 1; 491 } 492 } 493 else { 494 time_t now = time(NULL); 495 time_t expire = parse_date(now, arg->val); 496 497 if (pwd->pw_change != expire) { 498 pwd->pw_change = expire; 499 edited = 1; 500 } 501 } 502 } 503 504 if ((arg = getarg(args, 'e')) != NULL) { 505 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 506 if (pwd->pw_expire != 0) { 507 pwd->pw_expire = 0; 508 edited = 1; 509 } 510 } 511 else { 512 time_t now = time(NULL); 513 time_t expire = parse_date(now, arg->val); 514 515 if (pwd->pw_expire != expire) { 516 pwd->pw_expire = expire; 517 edited = 1; 518 } 519 } 520 } 521 522 if ((arg = getarg(args, 's')) != NULL) { 523 char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 524 if (shell == NULL) 525 shell = ""; 526 if (strcmp(shell, pwd->pw_shell) != 0) { 527 pwd->pw_shell = shell; 528 edited = 1; 529 } 530 } 531 532 if (getarg(args, 'L')) { 533 if (cnf->default_class == NULL) 534 cnf->default_class = ""; 535 if (strcmp(pwd->pw_class, cnf->default_class) != 0) { 536 pwd->pw_class = cnf->default_class; 537 edited = 1; 538 } 539 } 540 541 if ((arg = getarg(args, 'd')) != NULL) { 542 if (strcmp(pwd->pw_dir, arg->val)) 543 edited = 1; 544 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 545 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 546 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 547 } else if (!S_ISDIR(st.st_mode)) 548 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 549 } 550 551 if ((arg = getarg(args, 'w')) != NULL && 552 getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) { 553 login_cap_t *lc; 554 555 lc = login_getpwclass(pwd); 556 if (lc == NULL || 557 login_setcryptfmt(lc, "sha512", NULL) == NULL) 558 warn("setting crypt(3) format"); 559 login_close(lc); 560 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 561 edited = 1; 562 } 563 564 } else { 565 login_cap_t *lc; 566 567 /* 568 * Add code 569 */ 570 571 if (a_name == NULL) /* Required */ 572 errx(EX_DATAERR, "login name required"); 573 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */ 574 errx(EX_DATAERR, "login name `%s' already exists", a_name->val); 575 576 /* 577 * Now, set up defaults for a new user 578 */ 579 pwd = &fakeuser; 580 pwd->pw_name = a_name->val; 581 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 582 pwd->pw_uid = pw_uidpolicy(cnf, args); 583 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid); 584 pwd->pw_change = pw_pwdpolicy(cnf, args); 585 pwd->pw_expire = pw_exppolicy(cnf, args); 586 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 587 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 588 lc = login_getpwclass(pwd); 589 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL) 590 warn("setting crypt(3) format"); 591 login_close(lc); 592 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 593 edited = 1; 594 595 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 596 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 597 } 598 599 /* 600 * Shared add/edit code 601 */ 602 if ((arg = getarg(args, 'c')) != NULL) { 603 char *gecos = pw_checkname((u_char *)arg->val, 1); 604 if (strcmp(pwd->pw_gecos, gecos) != 0) { 605 pwd->pw_gecos = gecos; 606 edited = 1; 607 } 608 } 609 610 if ((arg = getarg(args, 'h')) != NULL || 611 (arg = getarg(args, 'H')) != NULL) { 612 if (strcmp(arg->val, "-") == 0) { 613 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') { 614 pwd->pw_passwd = "*"; /* No access */ 615 edited = 1; 616 } 617 } else { 618 int fd = atoi(arg->val); 619 int precrypt = (arg->ch == 'H'); 620 int b; 621 int istty = isatty(fd); 622 struct termios t; 623 login_cap_t *lc; 624 625 if (istty) { 626 if (tcgetattr(fd, &t) == -1) 627 istty = 0; 628 else { 629 struct termios n = t; 630 631 /* Disable echo */ 632 n.c_lflag &= ~(ECHO); 633 tcsetattr(fd, TCSANOW, &n); 634 printf("%s%spassword for user %s:", 635 (mode == M_UPDATE) ? "new " : "", 636 precrypt ? "encrypted " : "", 637 pwd->pw_name); 638 fflush(stdout); 639 } 640 } 641 b = read(fd, line, sizeof(line) - 1); 642 if (istty) { /* Restore state */ 643 tcsetattr(fd, TCSANOW, &t); 644 fputc('\n', stdout); 645 fflush(stdout); 646 } 647 if (b < 0) { 648 warn("-%c file descriptor", precrypt ? 'H' : 649 'h'); 650 return EX_IOERR; 651 } 652 line[b] = '\0'; 653 if ((p = strpbrk(line, "\r\n")) != NULL) 654 *p = '\0'; 655 if (!*line) 656 errx(EX_DATAERR, "empty password read on file descriptor %d", fd); 657 if (precrypt) { 658 if (strchr(line, ':') != NULL) 659 return EX_DATAERR; 660 pwd->pw_passwd = line; 661 } else { 662 lc = login_getpwclass(pwd); 663 if (lc == NULL || 664 login_setcryptfmt(lc, "md5", NULL) == NULL) 665 warn("setting crypt(3) format"); 666 login_close(lc); 667 pwd->pw_passwd = pw_pwcrypt(line); 668 } 669 edited = 1; 670 } 671 } 672 673 /* 674 * Special case: -N only displays & exits 675 */ 676 if (getarg(args, 'N') != NULL) 677 return print_user(pwd, 678 getarg(args, 'P') != NULL, 679 getarg(args, '7') != NULL); 680 681 if (mode == M_ADD) { 682 edited = 1; /* Always */ 683 rc = addpwent(pwd); 684 if (rc == -1) { 685 warnx("user '%s' already exists", pwd->pw_name); 686 return EX_IOERR; 687 } else if (rc != 0) { 688 warn("passwd file update"); 689 return EX_IOERR; 690 } 691 if (cnf->nispasswd && *cnf->nispasswd=='/') { 692 rc = addnispwent(cnf->nispasswd, pwd); 693 if (rc == -1) 694 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 695 else 696 warn("NIS passwd update"); 697 /* NOTE: we treat NIS-only update errors as non-fatal */ 698 } 699 } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) { 700 if (edited) { /* Only updated this if required */ 701 rc = chgpwent(a_name->val, pwd); 702 if (rc == -1) { 703 warnx("user '%s' does not exist (NIS?)", pwd->pw_name); 704 return EX_IOERR; 705 } else if (rc != 0) { 706 warn("passwd file update"); 707 return EX_IOERR; 708 } 709 if ( cnf->nispasswd && *cnf->nispasswd=='/') { 710 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd); 711 if (rc == -1) 712 warn("User '%s' not found in NIS passwd", pwd->pw_name); 713 else 714 warn("NIS passwd update"); 715 /* NOTE: NIS-only update errors are not fatal */ 716 } 717 } 718 } 719 720 /* 721 * Ok, user is created or changed - now edit group file 722 */ 723 724 if (mode == M_ADD || getarg(args, 'G') != NULL) 725 editgroups(pwd->pw_name, cnf->groups); 726 727 /* go get a current version of pwd */ 728 pwd = GETPWNAM(a_name->val); 729 if (pwd == NULL) { 730 /* This will fail when we rename, so special case that */ 731 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) { 732 a_name->val = arg->val; /* update new name */ 733 pwd = GETPWNAM(a_name->val); /* refetch renamed rec */ 734 } 735 } 736 if (pwd == NULL) /* can't go on without this */ 737 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val); 738 739 grp = GETGRGID(pwd->pw_gid); 740 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s", 741 pwd->pw_name, (long) pwd->pw_uid, 742 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1), 743 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 744 745 /* 746 * If adding, let's touch and chown the user's mail file. This is not 747 * strictly necessary under BSD with a 0755 maildir but it also 748 * doesn't hurt anything to create the empty mailfile 749 */ 750 if (mode == M_ADD) { 751 if (!PWALTDIR()) { 752 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 753 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 754 * mtime */ 755 chown(line, pwd->pw_uid, pwd->pw_gid); 756 } 757 } 758 759 /* 760 * Let's create and populate the user's home directory. Note 761 * that this also `works' for editing users if -m is used, but 762 * existing files will *not* be overwritten. 763 */ 764 if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) { 765 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid); 766 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made", 767 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir); 768 } 769 770 771 /* 772 * Finally, send mail to the new user as well, if we are asked to 773 */ 774 if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 775 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 776 777 if (pfp == NULL) 778 warn("sendmail"); 779 else { 780 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 781 while (fgets(line, sizeof(line), fp) != NULL) { 782 /* Do substitutions? */ 783 fputs(line, pfp); 784 } 785 pclose(pfp); 786 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent", 787 pwd->pw_name, (long) pwd->pw_uid); 788 } 789 fclose(fp); 790 } 791 792 return EXIT_SUCCESS; 793} 794 795 796static uid_t 797pw_uidpolicy(struct userconf * cnf, struct cargs * args) 798{ 799 struct passwd *pwd; 800 uid_t uid = (uid_t) - 1; 801 struct carg *a_uid = getarg(args, 'u'); 802 803 /* 804 * Check the given uid, if any 805 */ 806 if (a_uid != NULL) { 807 uid = (uid_t) atol(a_uid->val); 808 809 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL) 810 errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid); 811 } else { 812 struct bitmap bm; 813 814 /* 815 * We need to allocate the next available uid under one of 816 * two policies a) Grab the first unused uid b) Grab the 817 * highest possible unused uid 818 */ 819 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 820 * claus^H^H^H^Hheck */ 821 cnf->min_uid = 1000; 822 cnf->max_uid = 32000; 823 } 824 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 825 826 /* 827 * Now, let's fill the bitmap from the password file 828 */ 829 SETPWENT(); 830 while ((pwd = GETPWENT()) != NULL) 831 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 832 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 833 ENDPWENT(); 834 835 /* 836 * Then apply the policy, with fallback to reuse if necessary 837 */ 838 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 839 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 840 841 /* 842 * Another sanity check 843 */ 844 if (uid < cnf->min_uid || uid > cnf->max_uid) 845 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 846 bm_dealloc(&bm); 847 } 848 return uid; 849} 850 851 852static uid_t 853pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer) 854{ 855 struct group *grp; 856 gid_t gid = (uid_t) - 1; 857 struct carg *a_gid = getarg(args, 'g'); 858 859 /* 860 * If no arg given, see if default can help out 861 */ 862 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 863 a_gid = addarg(args, 'g', cnf->default_group); 864 865 /* 866 * Check the given gid, if any 867 */ 868 SETGRENT(); 869 if (a_gid != NULL) { 870 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 871 gid = (gid_t) atol(a_gid->val); 872 if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 873 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 874 } 875 gid = grp->gr_gid; 876 } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) { 877 gid = grp->gr_gid; /* Already created? Use it anyway... */ 878 } else { 879 struct cargs grpargs; 880 char tmp[32]; 881 882 LIST_INIT(&grpargs); 883 addarg(&grpargs, 'n', nam); 884 885 /* 886 * We need to auto-create a group with the user's name. We 887 * can send all the appropriate output to our sister routine 888 * bit first see if we can create a group with gid==uid so we 889 * can keep the user and group ids in sync. We purposely do 890 * NOT check the gid range if we can force the sync. If the 891 * user's name dups an existing group, then the group add 892 * function will happily handle that case for us and exit. 893 */ 894 if (GETGRGID(prefer) == NULL) { 895 sprintf(tmp, "%lu", (unsigned long) prefer); 896 addarg(&grpargs, 'g', tmp); 897 } 898 if (getarg(args, 'N')) 899 { 900 addarg(&grpargs, 'N', NULL); 901 addarg(&grpargs, 'q', NULL); 902 gid = pw_group(cnf, M_NEXT, &grpargs); 903 } 904 else 905 { 906 pw_group(cnf, M_ADD, &grpargs); 907 if ((grp = GETGRNAM(nam)) != NULL) 908 gid = grp->gr_gid; 909 } 910 a_gid = LIST_FIRST(&grpargs); 911 while (a_gid != NULL) { 912 struct carg *t = LIST_NEXT(a_gid, list); 913 LIST_REMOVE(a_gid, list); 914 a_gid = t; 915 } 916 } 917 ENDGRENT(); 918 return gid; 919} 920 921 922static time_t 923pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 924{ 925 time_t result = 0; 926 time_t now = time(NULL); 927 struct carg *arg = getarg(args, 'p'); 928 929 if (arg != NULL) { 930 if ((result = parse_date(now, arg->val)) == now) 931 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 932 } else if (cnf->password_days > 0) 933 result = now + ((long) cnf->password_days * 86400L); 934 return result; 935} 936 937 938static time_t 939pw_exppolicy(struct userconf * cnf, struct cargs * args) 940{ 941 time_t result = 0; 942 time_t now = time(NULL); 943 struct carg *arg = getarg(args, 'e'); 944 945 if (arg != NULL) { 946 if ((result = parse_date(now, arg->val)) == now) 947 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 948 } else if (cnf->expire_days > 0) 949 result = now + ((long) cnf->expire_days * 86400L); 950 return result; 951} 952 953 954static char * 955pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 956{ 957 struct carg *arg = getarg(args, 'd'); 958 959 if (arg) 960 return arg->val; 961 else { 962 static char home[128]; 963 964 if (cnf->home == NULL || *cnf->home == '\0') 965 errx(EX_CONFIG, "no base home directory set"); 966 sprintf(home, "%s/%s", cnf->home, user); 967 return home; 968 } 969} 970 971static char * 972shell_path(char const * path, char *shells[], char *sh) 973{ 974 if (sh != NULL && (*sh == '/' || *sh == '\0')) 975 return sh; /* specified full path or forced none */ 976 else { 977 char *p; 978 char paths[_UC_MAXLINE]; 979 980 /* 981 * We need to search paths 982 */ 983 strlcpy(paths, path, sizeof(paths)); 984 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 985 int i; 986 static char shellpath[256]; 987 988 if (sh != NULL) { 989 sprintf(shellpath, "%s/%s", p, sh); 990 if (access(shellpath, X_OK) == 0) 991 return shellpath; 992 } else 993 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 994 sprintf(shellpath, "%s/%s", p, shells[i]); 995 if (access(shellpath, X_OK) == 0) 996 return shellpath; 997 } 998 } 999 if (sh == NULL) 1000 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 1001 errx(EX_CONFIG, "no default shell available or defined"); 1002 return NULL; 1003 } 1004} 1005 1006 1007static char * 1008pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 1009{ 1010 char *sh = newshell; 1011 struct carg *arg = getarg(args, 's'); 1012 1013 if (newshell == NULL && arg != NULL) 1014 sh = arg->val; 1015 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 1016} 1017 1018#define SALTSIZE 32 1019 1020static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./"; 1021 1022char * 1023pw_pwcrypt(char *password) 1024{ 1025 int i; 1026 char salt[SALTSIZE + 1]; 1027 1028 static char buf[256]; 1029 1030 /* 1031 * Calculate a salt value 1032 */ 1033 for (i = 0; i < SALTSIZE; i++) 1034 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)]; 1035 salt[SALTSIZE] = '\0'; 1036 1037 return strcpy(buf, crypt(password, salt)); 1038} 1039 1040 1041static char * 1042pw_password(struct userconf * cnf, struct cargs * args, char const * user) 1043{ 1044 int i, l; 1045 char pwbuf[32]; 1046 1047 switch (cnf->default_password) { 1048 case -1: /* Random password */ 1049 l = (arc4random() % 8 + 8); /* 8 - 16 chars */ 1050 for (i = 0; i < l; i++) 1051 pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)]; 1052 pwbuf[i] = '\0'; 1053 1054 /* 1055 * We give this information back to the user 1056 */ 1057 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL && 1058 getarg(args, 'N') == NULL) { 1059 if (isatty(STDOUT_FILENO)) 1060 printf("Password for '%s' is: ", user); 1061 printf("%s\n", pwbuf); 1062 fflush(stdout); 1063 } 1064 break; 1065 1066 case -2: /* No password at all! */ 1067 return ""; 1068 1069 case 0: /* No login - default */ 1070 default: 1071 return "*"; 1072 1073 case 1: /* user's name */ 1074 strlcpy(pwbuf, user, sizeof(pwbuf)); 1075 break; 1076 } 1077 return pw_pwcrypt(pwbuf); 1078} 1079 1080 1081static int 1082print_user(struct passwd * pwd, int pretty, int v7) 1083{ 1084 if (!pretty) { 1085 char buf[_UC_MAXLINE]; 1086 1087 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD); 1088 fputs(buf, stdout); 1089 } else { 1090 int j; 1091 char *p; 1092 struct group *grp = GETGRGID(pwd->pw_gid); 1093 char uname[60] = "User &", office[60] = "[None]", 1094 wphone[60] = "[None]", hphone[60] = "[None]"; 1095 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1096 struct tm * tptr; 1097 1098 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1099 strlcpy(uname, p, sizeof(uname)); 1100 if ((p = strtok(NULL, ",")) != NULL) { 1101 strlcpy(office, p, sizeof(office)); 1102 if ((p = strtok(NULL, ",")) != NULL) { 1103 strlcpy(wphone, p, sizeof(wphone)); 1104 if ((p = strtok(NULL, "")) != NULL) { 1105 strlcpy(hphone, p, 1106 sizeof(hphone)); 1107 } 1108 } 1109 } 1110 } 1111 /* 1112 * Handle '&' in gecos field 1113 */ 1114 if ((p = strchr(uname, '&')) != NULL) { 1115 int l = strlen(pwd->pw_name); 1116 int m = strlen(p); 1117 1118 memmove(p + l, p + 1, m); 1119 memmove(p, pwd->pw_name, l); 1120 *p = (char) toupper((unsigned char)*p); 1121 } 1122 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1123 strftime(acexpire, sizeof acexpire, "%c", tptr); 1124 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 1125 strftime(pwexpire, sizeof pwexpire, "%c", tptr); 1126 printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n" 1127 " Full Name: %s\n" 1128 " Home: %-26.26s Class: %s\n" 1129 " Shell: %-26.26s Office: %s\n" 1130 "Work Phone: %-26.26s Home Phone: %s\n" 1131 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1132 pwd->pw_name, (long) pwd->pw_uid, 1133 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid, 1134 uname, pwd->pw_dir, pwd->pw_class, 1135 pwd->pw_shell, office, wphone, hphone, 1136 acexpire, pwexpire); 1137 SETGRENT(); 1138 j = 0; 1139 while ((grp=GETGRENT()) != NULL) 1140 { 1141 int i = 0; 1142 while (grp->gr_mem[i] != NULL) 1143 { 1144 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1145 { 1146 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1147 break; 1148 } 1149 ++i; 1150 } 1151 } 1152 ENDGRENT(); 1153 printf("%s", j ? "\n" : ""); 1154 } 1155 return EXIT_SUCCESS; 1156} 1157 1158char * 1159pw_checkname(u_char *name, int gecos) 1160{ 1161 char showch[8]; 1162 u_char const *badchars, *ch, *showtype; 1163 int reject; 1164 1165 ch = name; 1166 reject = 0; 1167 if (gecos) { 1168 /* See if the name is valid as a gecos (comment) field. */ 1169 badchars = ":!@"; 1170 showtype = "gecos field"; 1171 } else { 1172 /* See if the name is valid as a userid or group. */ 1173 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\""; 1174 showtype = "userid/group name"; 1175 /* Userids and groups can not have a leading '-'. */ 1176 if (*ch == '-') 1177 reject = 1; 1178 } 1179 if (!reject) { 1180 while (*ch) { 1181 if (strchr(badchars, *ch) != NULL || *ch < ' ' || 1182 *ch == 127) { 1183 reject = 1; 1184 break; 1185 } 1186 /* 8-bit characters are only allowed in GECOS fields */ 1187 if (!gecos && (*ch & 0x80)) { 1188 reject = 1; 1189 break; 1190 } 1191 ch++; 1192 } 1193 } 1194 /* 1195 * A `$' is allowed as the final character for userids and groups, 1196 * mainly for the benefit of samba. 1197 */ 1198 if (reject && !gecos) { 1199 if (*ch == '$' && *(ch + 1) == '\0') { 1200 reject = 0; 1201 ch++; 1202 } 1203 } 1204 if (reject) { 1205 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127) 1206 ? "`%c'" : "0x%02x", *ch); 1207 errx(EX_DATAERR, "invalid character %s at position %td in %s", 1208 showch, (ch - name), showtype); 1209 } 1210 if (!gecos && (ch - name) > LOGNAMESIZE) 1211 errx(EX_DATAERR, "name too long `%s' (max is %d)", name, 1212 LOGNAMESIZE); 1213 return (char *)name; 1214} 1215 1216 1217static void 1218rmat(uid_t uid) 1219{ 1220 DIR *d = opendir("/var/at/jobs"); 1221 1222 if (d != NULL) { 1223 struct dirent *e; 1224 1225 while ((e = readdir(d)) != NULL) { 1226 struct stat st; 1227 1228 if (strncmp(e->d_name, ".lock", 5) != 0 && 1229 stat(e->d_name, &st) == 0 && 1230 !S_ISDIR(st.st_mode) && 1231 st.st_uid == uid) { 1232 char tmp[MAXPATHLEN]; 1233 1234 sprintf(tmp, "/usr/bin/atrm %s", e->d_name); 1235 system(tmp); 1236 } 1237 } 1238 closedir(d); 1239 } 1240} 1241 1242static void 1243rmopie(char const * name) 1244{ 1245 static const char etcopie[] = "/etc/opiekeys"; 1246 FILE *fp = fopen(etcopie, "r+"); 1247 1248 if (fp != NULL) { 1249 char tmp[1024]; 1250 off_t atofs = 0; 1251 int length = strlen(name); 1252 1253 while (fgets(tmp, sizeof tmp, fp) != NULL) { 1254 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') { 1255 if (fseek(fp, atofs, SEEK_SET) == 0) { 1256 fwrite("#", 1, 1, fp); /* Comment username out */ 1257 } 1258 break; 1259 } 1260 atofs = ftell(fp); 1261 } 1262 /* 1263 * If we got an error of any sort, don't update! 1264 */ 1265 fclose(fp); 1266 } 1267} 1268 1269