pw_user.c revision 62461
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: head/usr.sbin/pw/pw_user.c 62461 2000-07-03 12:13:10Z davidn $"; 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#if defined(USE_MD5RAND) 46#include <md5.h> 47#endif 48#include "pw.h" 49#include "bitmap.h" 50 51#if (MAXLOGNAME-1) > UT_NAMESIZE 52#define LOGNAMESIZE UT_NAMESIZE 53#else 54#define LOGNAMESIZE (MAXLOGNAME-1) 55#endif 56 57static int randinit; 58static char locked_str[] = "*LOCKED*"; 59 60static int print_user(struct passwd * pwd, int pretty, int v7); 61static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args); 62static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer); 63static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args); 64static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args); 65static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user); 66static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell); 67static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user); 68static char *shell_path(char const * path, char *shells[], char *sh); 69static void rmat(uid_t uid); 70static void rmskey(char const * name); 71 72/*- 73 * -C config configuration file 74 * -q quiet operation 75 * -n name login name 76 * -u uid user id 77 * -c comment user name/comment 78 * -d directory home directory 79 * -e date account expiry date 80 * -p date password expiry date 81 * -g grp primary group 82 * -G grp1,grp2 additional groups 83 * -m [ -k dir ] create and set up home 84 * -s shell name of login shell 85 * -o duplicate uid ok 86 * -L class user class 87 * -l name new login name 88 * -h fd password filehandle 89 * -F force print or add 90 * Setting defaults: 91 * -D set user defaults 92 * -b dir default home root dir 93 * -e period default expiry period 94 * -p period default password change period 95 * -g group default group 96 * -G grp1,grp2.. default additional groups 97 * -L class default login class 98 * -k dir default home skeleton 99 * -s shell default shell 100 * -w method default password method 101 */ 102 103int 104pw_user(struct userconf * cnf, int mode, struct cargs * args) 105{ 106 int rc, edited = 0; 107 char *p = NULL; 108 char *passtmp; 109 struct carg *a_name; 110 struct carg *a_uid; 111 struct carg *arg; 112 struct passwd *pwd = NULL; 113 struct group *grp; 114 struct stat st; 115 char line[_PASSWORD_LEN+1]; 116 117 static struct passwd fakeuser = 118 { 119 NULL, 120 "*", 121 -1, 122 -1, 123 0, 124 "", 125 "User &", 126 "/nonexistent", 127 "/bin/sh", 128 0 129#if defined(__FreeBSD__) 130 ,0 131#endif 132 }; 133 134 135 /* 136 * With M_NEXT, we only need to return the 137 * next uid to stdout 138 */ 139 if (mode == M_NEXT) 140 { 141 uid_t next = pw_uidpolicy(cnf, args); 142 if (getarg(args, 'q')) 143 return next; 144 printf("%ld:", (long)next); 145 pw_group(cnf, mode, args); 146 return EXIT_SUCCESS; 147 } 148 149 /* 150 * We can do all of the common legwork here 151 */ 152 153 if ((arg = getarg(args, 'b')) != NULL) { 154 cnf->home = arg->val; 155 } 156 157 /* 158 * If we'll need to use it or we're updating it, 159 * then create the base home directory if necessary 160 */ 161 if (arg != NULL || getarg(args, 'm') != NULL) { 162 int l = strlen(cnf->home); 163 164 if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */ 165 cnf->home[--l] = '\0'; 166 167 if (l < 2 || *cnf->home != '/') /* Check for absolute path name */ 168 errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home); 169 170 if (stat(cnf->home, &st) == -1) { 171 char dbuf[MAXPATHLEN]; 172 173 /* 174 * This is a kludge especially for Joerg :) 175 * If the home directory would be created in the root partition, then 176 * we really create it under /usr which is likely to have more space. 177 * But we create a symlink from cnf->home -> "/usr" -> cnf->home 178 */ 179 if (strchr(cnf->home+1, '/') == NULL) { 180 strcpy(dbuf, "/usr"); 181 strncat(dbuf, cnf->home, MAXPATHLEN-5); 182 if (mkdir(dbuf, 0755) != -1 || errno == EEXIST) { 183 chown(dbuf, 0, 0); 184 symlink(dbuf, cnf->home); 185 } 186 /* If this falls, fall back to old method */ 187 } 188 p = strncpy(dbuf, cnf->home, sizeof dbuf); 189 dbuf[MAXPATHLEN-1] = '\0'; 190 if (stat(dbuf, &st) == -1) { 191 while ((p = strchr(++p, '/')) != NULL) { 192 *p = '\0'; 193 if (stat(dbuf, &st) == -1) { 194 if (mkdir(dbuf, 0755) == -1) 195 goto direrr; 196 chown(dbuf, 0, 0); 197 } else if (!S_ISDIR(st.st_mode)) 198 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf); 199 *p = '/'; 200 } 201 } 202 if (stat(dbuf, &st) == -1) { 203 if (mkdir(dbuf, 0755) == -1) { 204 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf); 205 } 206 chown(dbuf, 0, 0); 207 } 208 } else if (!S_ISDIR(st.st_mode)) 209 errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home); 210 } 211 212 if ((arg = getarg(args, 'e')) != NULL) 213 cnf->expire_days = atoi(arg->val); 214 215 if ((arg = getarg(args, 'y')) != NULL) 216 cnf->nispasswd = arg->val; 217 218 if ((arg = getarg(args, 'p')) != NULL && arg->val) 219 cnf->password_days = atoi(arg->val); 220 221 if ((arg = getarg(args, 'g')) != NULL) { 222 p = arg->val; 223 if ((grp = GETGRNAM(p)) == NULL) { 224 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 225 errx(EX_NOUSER, "group `%s' does not exist", p); 226 } 227 cnf->default_group = newstr(grp->gr_name); 228 } 229 if ((arg = getarg(args, 'L')) != NULL) 230 cnf->default_class = pw_checkname((u_char *)arg->val, 0); 231 232 if ((arg = getarg(args, 'G')) != NULL && arg->val) { 233 int i = 0; 234 235 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) { 236 if ((grp = GETGRNAM(p)) == NULL) { 237 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL) 238 errx(EX_NOUSER, "group `%s' does not exist", p); 239 } 240 if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1) 241 cnf->groups[i++] = newstr(grp->gr_name); 242 } 243 while (i < cnf->numgroups) 244 cnf->groups[i++] = NULL; 245 } 246 247 if ((arg = getarg(args, 'k')) != NULL) { 248 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode)) 249 errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir); 250 } 251 252 if ((arg = getarg(args, 's')) != NULL) 253 cnf->shell_default = arg->val; 254 255 if (mode == M_ADD && getarg(args, 'D')) { 256 if (getarg(args, 'n') != NULL) 257 errx(EX_DATAERR, "can't combine `-D' with `-n name'"); 258 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 259 if ((cnf->min_uid = (uid_t) atoi(p)) == 0) 260 cnf->min_uid = 1000; 261 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid) 262 cnf->max_uid = 32000; 263 } 264 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) { 265 if ((cnf->min_gid = (gid_t) atoi(p)) == 0) 266 cnf->min_gid = 1000; 267 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid) 268 cnf->max_gid = 32000; 269 } 270 if ((arg = getarg(args, 'w')) != NULL) 271 cnf->default_password = boolean_val(arg->val, cnf->default_password); 272 273 arg = getarg(args, 'C'); 274 if (write_userconfig(arg ? arg->val : NULL)) 275 return EXIT_SUCCESS; 276 warn("config update"); 277 return EX_IOERR; 278 } 279 280 if (mode == M_PRINT && getarg(args, 'a')) { 281 int pretty = getarg(args, 'P') != NULL; 282 int v7 = getarg(args, '7') != NULL; 283 284 SETPWENT(); 285 while ((pwd = GETPWENT()) != NULL) 286 print_user(pwd, pretty, v7); 287 ENDPWENT(); 288 return EXIT_SUCCESS; 289 } 290 291 if ((a_name = getarg(args, 'n')) != NULL) 292 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0)); 293 a_uid = getarg(args, 'u'); 294 295 if (a_uid == NULL) { 296 if (a_name == NULL) 297 errx(EX_DATAERR, "user name or id required"); 298 299 /* 300 * Determine whether 'n' switch is name or uid - we don't 301 * really don't really care which we have, but we need to 302 * know. 303 */ 304 if (mode != M_ADD && pwd == NULL 305 && strspn(a_name->val, "0123456789") == strlen(a_name->val) 306 && atoi(a_name->val) > 0) { /* Assume uid */ 307 (a_uid = a_name)->ch = 'u'; 308 a_name = NULL; 309 } 310 } 311 312 /* 313 * Update, delete & print require that the user exists 314 */ 315 if (mode == M_UPDATE || mode == M_DELETE || 316 mode == M_PRINT || mode == M_LOCK || mode == M_UNLOCK) { 317 318 if (a_name == NULL && pwd == NULL) /* Try harder */ 319 pwd = GETPWUID(atoi(a_uid->val)); 320 321 if (pwd == NULL) { 322 if (mode == M_PRINT && getarg(args, 'F')) { 323 fakeuser.pw_name = a_name ? a_name->val : "nouser"; 324 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1; 325 return print_user(&fakeuser, 326 getarg(args, 'P') != NULL, 327 getarg(args, '7') != NULL); 328 } 329 if (a_name == NULL) 330 errx(EX_NOUSER, "no such uid `%s'", a_uid->val); 331 errx(EX_NOUSER, "no such user `%s'", a_name->val); 332 } 333 334 if (a_name == NULL) /* May be needed later */ 335 a_name = addarg(args, 'n', newstr(pwd->pw_name)); 336 337 /* 338 * The M_LOCK and M_UNLOCK functions simply add or remove 339 * a "*LOCKED*" prefix from in front of the password to 340 * prevent it decoding correctly, and therefore prevents 341 * access. Of course, this only prevents access via 342 * password authentication (not ssh, kerberos or any 343 * other method that does not use the UNIX password) but 344 * that is a known limitation. 345 */ 346 347 if (mode == M_LOCK) { 348 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0) 349 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name); 350 passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str)); 351 if (passtmp == NULL) /* disaster */ 352 errx(EX_UNAVAILABLE, "out of memory"); 353 strcpy(passtmp, locked_str); 354 strcat(passtmp, pwd->pw_passwd); 355 pwd->pw_passwd = passtmp; 356 edited = 1; 357 } else if (mode == M_UNLOCK) { 358 if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0) 359 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name); 360 pwd->pw_passwd += sizeof(locked_str)-1; 361 edited = 1; 362 } else if (mode == M_DELETE) { 363 /* 364 * Handle deletions now 365 */ 366 char file[MAXPATHLEN]; 367 char home[MAXPATHLEN]; 368 uid_t uid = pwd->pw_uid; 369 370 if (strcmp(pwd->pw_name, "root") == 0) 371 errx(EX_DATAERR, "cannot remove user 'root'"); 372 373 if (!PWALTDIR()) { 374 /* 375 * Remove skey record from /etc/skeykeys 376 */ 377 378 rmskey(pwd->pw_name); 379 380 /* 381 * Remove crontabs 382 */ 383 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name); 384 if (access(file, F_OK) == 0) { 385 sprintf(file, "crontab -u %s -r", pwd->pw_name); 386 system(file); 387 } 388 } 389 /* 390 * Save these for later, since contents of pwd may be 391 * invalidated by deletion 392 */ 393 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 394 strncpy(home, pwd->pw_dir, sizeof home); 395 home[sizeof home - 1] = '\0'; 396 397 rc = delpwent(pwd); 398 if (rc == -1) 399 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name); 400 else if (rc != 0) { 401 warn("passwd update"); 402 return EX_IOERR; 403 } 404 405 if (cnf->nispasswd && *cnf->nispasswd=='/') { 406 rc = delnispwent(cnf->nispasswd, a_name->val); 407 if (rc == -1) 408 warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name); 409 else if (rc != 0) 410 warn("WARNING: NIS passwd update"); 411 /* non-fatal */ 412 } 413 414 editgroups(a_name->val, NULL); 415 416 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid); 417 418 if (!PWALTDIR()) { 419 /* 420 * Remove mail file 421 */ 422 remove(file); 423 424 /* 425 * Remove at jobs 426 */ 427 if (getpwuid(uid) == NULL) 428 rmat(uid); 429 430 /* 431 * Remove home directory and contents 432 */ 433 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) { 434 if (stat(home, &st) != -1) { 435 rm_r(home, uid); 436 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved", 437 a_name->val, (long) uid, home, 438 stat(home, &st) == -1 ? "" : "not completely "); 439 } 440 } 441 } 442 return EXIT_SUCCESS; 443 } else if (mode == M_PRINT) 444 return print_user(pwd, 445 getarg(args, 'P') != NULL, 446 getarg(args, '7') != NULL); 447 448 /* 449 * The rest is edit code 450 */ 451 if ((arg = getarg(args, 'l')) != NULL) { 452 if (strcmp(pwd->pw_name, "root") == 0) 453 errx(EX_DATAERR, "can't rename `root' account"); 454 pwd->pw_name = pw_checkname((u_char *)arg->val, 0); 455 edited = 1; 456 } 457 458 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) { 459 pwd->pw_uid = (uid_t) atol(arg->val); 460 edited = 1; 461 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0) 462 errx(EX_DATAERR, "can't change uid of `root' account"); 463 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 464 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name); 465 } 466 467 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */ 468 gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid; 469 if (newgid != pwd->pw_gid) { 470 edited = 1; 471 pwd->pw_gid = newgid; 472 } 473 } 474 475 if ((arg = getarg(args, 'p')) != NULL) { 476 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 477 if (pwd->pw_change != 0) { 478 pwd->pw_change = 0; 479 edited = 1; 480 } 481 } 482 else { 483 time_t now = time(NULL); 484 time_t expire = parse_date(now, arg->val); 485 486 if (now == expire) 487 errx(EX_DATAERR, "invalid password change date `%s'", arg->val); 488 if (pwd->pw_change != expire) { 489 pwd->pw_change = expire; 490 edited = 1; 491 } 492 } 493 } 494 495 if ((arg = getarg(args, 'e')) != NULL) { 496 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) { 497 if (pwd->pw_expire != 0) { 498 pwd->pw_expire = 0; 499 edited = 1; 500 } 501 } 502 else { 503 time_t now = time(NULL); 504 time_t expire = parse_date(now, arg->val); 505 506 if (now == expire) 507 errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val); 508 if (pwd->pw_expire != expire) { 509 pwd->pw_expire = expire; 510 edited = 1; 511 } 512 } 513 } 514 515 if ((arg = getarg(args, 's')) != NULL) { 516 char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val); 517 if (shell == NULL) 518 shell = ""; 519 if (strcmp(shell, pwd->pw_shell) != 0) { 520 pwd->pw_shell = shell; 521 edited = 1; 522 } 523 } 524 525 if (getarg(args, 'L')) { 526 if (cnf->default_class == NULL) 527 cnf->default_class = ""; 528 if (strcmp(pwd->pw_class, cnf->default_class) != 0) { 529 pwd->pw_class = cnf->default_class; 530 edited = 1; 531 } 532 } 533 534 if ((arg = getarg(args, 'd')) != NULL) { 535 edited = strcmp(pwd->pw_dir, arg->val) != 0; 536 if (stat(pwd->pw_dir = arg->val, &st) == -1) { 537 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0) 538 warnx("WARNING: home `%s' does not exist", pwd->pw_dir); 539 } else if (!S_ISDIR(st.st_mode)) 540 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir); 541 } 542 543 if ((arg = getarg(args, 'w')) != NULL && getarg(args, 'h') == NULL) { 544 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 545 edited = 1; 546 } 547 548 } else { 549 550 /* 551 * Add code 552 */ 553 554 if (a_name == NULL) /* Required */ 555 errx(EX_DATAERR, "login name required"); 556 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */ 557 errx(EX_DATAERR, "login name `%s' already exists", a_name->val); 558 559 /* 560 * Now, set up defaults for a new user 561 */ 562 pwd = &fakeuser; 563 pwd->pw_name = a_name->val; 564 pwd->pw_class = cnf->default_class ? cnf->default_class : ""; 565 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name); 566 pwd->pw_uid = pw_uidpolicy(cnf, args); 567 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid); 568 pwd->pw_change = pw_pwdpolicy(cnf, args); 569 pwd->pw_expire = pw_exppolicy(cnf, args); 570 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name); 571 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL); 572 edited = 1; 573 574 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0) 575 warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name); 576 } 577 578 /* 579 * Shared add/edit code 580 */ 581 if ((arg = getarg(args, 'c')) != NULL) { 582 char *gecos = pw_checkname((u_char *)arg->val, 1); 583 if (strcmp(pwd->pw_gecos, gecos) != 0) { 584 pwd->pw_gecos = gecos; 585 edited = 1; 586 } 587 } 588 589 if ((arg = getarg(args, 'h')) != NULL) { 590 if (strcmp(arg->val, "-") == 0) 591 pwd->pw_passwd = "*"; /* No access */ 592 else { 593 int fd = atoi(arg->val); 594 int b; 595 int istty = isatty(fd); 596 struct termios t; 597 598 if (istty) { 599 if (tcgetattr(fd, &t) == -1) 600 istty = 0; 601 else { 602 struct termios n = t; 603 604 /* Disable echo */ 605 n.c_lflag &= ~(ECHO); 606 tcsetattr(fd, TCSANOW, &n); 607 printf("%sassword for user %s:", (mode == M_UPDATE) ? "New p" : "P", pwd->pw_name); 608 fflush(stdout); 609 } 610 } 611 b = read(fd, line, sizeof(line) - 1); 612 if (istty) { /* Restore state */ 613 tcsetattr(fd, TCSANOW, &t); 614 fputc('\n', stdout); 615 fflush(stdout); 616 } 617 if (b < 0) { 618 warn("-h file descriptor"); 619 return EX_IOERR; 620 } 621 line[b] = '\0'; 622 if ((p = strpbrk(line, " \t\r\n")) != NULL) 623 *p = '\0'; 624 if (!*line) 625 errx(EX_DATAERR, "empty password read on file descriptor %d", fd); 626 pwd->pw_passwd = pw_pwcrypt(line); 627 edited = 1; 628 } 629 } 630 631 /* 632 * Special case: -N only displays & exits 633 */ 634 if (getarg(args, 'N') != NULL) 635 return print_user(pwd, 636 getarg(args, 'P') != NULL, 637 getarg(args, '7') != NULL); 638 639 if (mode == M_ADD) { 640 edited = 1; /* Always */ 641 rc = addpwent(pwd); 642 if (rc == -1) { 643 warnx("user '%s' already exists", pwd->pw_name); 644 return EX_IOERR; 645 } else if (rc != 0) { 646 warn("passwd file update"); 647 return EX_IOERR; 648 } 649 if (cnf->nispasswd && *cnf->nispasswd=='/') { 650 rc = addnispwent(cnf->nispasswd, pwd); 651 if (rc == -1) 652 warnx("User '%s' already exists in NIS passwd", pwd->pw_name); 653 else 654 warn("NIS passwd update"); 655 /* NOTE: we treat NIS-only update errors as non-fatal */ 656 } 657 } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) { 658 if (edited) { /* Only updated this if required */ 659 rc = chgpwent(a_name->val, pwd); 660 if (rc == -1) { 661 warnx("user '%s' does not exist (NIS?)", pwd->pw_name); 662 return EX_IOERR; 663 } else if (rc != 0) { 664 warn("passwd file update"); 665 return EX_IOERR; 666 } 667 if ( cnf->nispasswd && *cnf->nispasswd=='/') { 668 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd); 669 if (rc == -1) 670 warn("User '%s' not found in NIS passwd", pwd->pw_name); 671 else 672 warn("NIS passwd update"); 673 /* NOTE: NIS-only update errors are not fatal */ 674 } 675 } 676 } 677 678 /* 679 * Ok, user is created or changed - now edit group file 680 */ 681 682 if (mode == M_ADD || getarg(args, 'G') != NULL) 683 editgroups(pwd->pw_name, cnf->groups); 684 685 /* go get a current version of pwd */ 686 pwd = GETPWNAM(a_name->val); 687 if (pwd == NULL) { 688 /* This will fail when we rename, so special case that */ 689 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) { 690 a_name->val = arg->val; /* update new name */ 691 pwd = GETPWNAM(a_name->val); /* refetch renamed rec */ 692 } 693 } 694 if (pwd == NULL) /* can't go on without this */ 695 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val); 696 697 grp = GETGRGID(pwd->pw_gid); 698 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%d):%s:%s:%s", 699 pwd->pw_name, (long) pwd->pw_uid, 700 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1), 701 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell); 702 703 /* 704 * If adding, let's touch and chown the user's mail file. This is not 705 * strictly necessary under BSD with a 0755 maildir but it also 706 * doesn't hurt anything to create the empty mailfile 707 */ 708 if (mode == M_ADD) { 709 FILE *fp; 710 711 if (!PWALTDIR()) { 712 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name); 713 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents & 714 * mtime */ 715 chown(line, pwd->pw_uid, pwd->pw_gid); 716 717 /* 718 * Send mail to the new user as well, if we are asked to 719 */ 720 if (cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) { 721 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w"); 722 723 if (pfp == NULL) 724 warn("sendmail"); 725 else { 726 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name); 727 while (fgets(line, sizeof(line), fp) != NULL) { 728 /* Do substitutions? */ 729 fputs(line, pfp); 730 } 731 pclose(pfp); 732 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent", 733 pwd->pw_name, (long) pwd->pw_uid); 734 } 735 fclose(fp); 736 } 737 } 738 } 739 740 /* 741 * Finally, let's create and populate the user's home directory. Note 742 * that this also `works' for editing users if -m is used, but 743 * existing files will *not* be overwritten. 744 */ 745 if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) { 746 copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid); 747 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made", 748 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir); 749 } 750 751 return EXIT_SUCCESS; 752} 753 754 755static uid_t 756pw_uidpolicy(struct userconf * cnf, struct cargs * args) 757{ 758 struct passwd *pwd; 759 uid_t uid = (uid_t) - 1; 760 struct carg *a_uid = getarg(args, 'u'); 761 762 /* 763 * Check the given uid, if any 764 */ 765 if (a_uid != NULL) { 766 uid = (uid_t) atol(a_uid->val); 767 768 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL) 769 errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid); 770 } else { 771 struct bitmap bm; 772 773 /* 774 * We need to allocate the next available uid under one of 775 * two policies a) Grab the first unused uid b) Grab the 776 * highest possible unused uid 777 */ 778 if (cnf->min_uid >= cnf->max_uid) { /* Sanity 779 * claus^H^H^H^Hheck */ 780 cnf->min_uid = 1000; 781 cnf->max_uid = 32000; 782 } 783 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1); 784 785 /* 786 * Now, let's fill the bitmap from the password file 787 */ 788 SETPWENT(); 789 while ((pwd = GETPWENT()) != NULL) 790 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid) 791 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid); 792 ENDPWENT(); 793 794 /* 795 * Then apply the policy, with fallback to reuse if necessary 796 */ 797 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid) 798 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid); 799 800 /* 801 * Another sanity check 802 */ 803 if (uid < cnf->min_uid || uid > cnf->max_uid) 804 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used"); 805 bm_dealloc(&bm); 806 } 807 return uid; 808} 809 810 811static uid_t 812pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer) 813{ 814 struct group *grp; 815 gid_t gid = (uid_t) - 1; 816 struct carg *a_gid = getarg(args, 'g'); 817 818 /* 819 * If no arg given, see if default can help out 820 */ 821 if (a_gid == NULL && cnf->default_group && *cnf->default_group) 822 a_gid = addarg(args, 'g', cnf->default_group); 823 824 /* 825 * Check the given gid, if any 826 */ 827 SETGRENT(); 828 if (a_gid != NULL) { 829 if ((grp = GETGRNAM(a_gid->val)) == NULL) { 830 gid = (gid_t) atol(a_gid->val); 831 if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL) 832 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val); 833 } 834 gid = grp->gr_gid; 835 } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) { 836 gid = grp->gr_gid; /* Already created? Use it anyway... */ 837 } else { 838 struct cargs grpargs; 839 char tmp[32]; 840 841 LIST_INIT(&grpargs); 842 addarg(&grpargs, 'n', nam); 843 844 /* 845 * We need to auto-create a group with the user's name. We 846 * can send all the appropriate output to our sister routine 847 * bit first see if we can create a group with gid==uid so we 848 * can keep the user and group ids in sync. We purposely do 849 * NOT check the gid range if we can force the sync. If the 850 * user's name dups an existing group, then the group add 851 * function will happily handle that case for us and exit. 852 */ 853 if (GETGRGID(prefer) == NULL) { 854 sprintf(tmp, "%lu", (unsigned long) prefer); 855 addarg(&grpargs, 'g', tmp); 856 } 857 if (getarg(args, 'N')) 858 { 859 addarg(&grpargs, 'N', NULL); 860 addarg(&grpargs, 'q', NULL); 861 gid = pw_group(cnf, M_NEXT, &grpargs); 862 } 863 else 864 { 865 pw_group(cnf, M_ADD, &grpargs); 866 if ((grp = GETGRNAM(nam)) != NULL) 867 gid = grp->gr_gid; 868 } 869 a_gid = grpargs.lh_first; 870 while (a_gid != NULL) { 871 struct carg *t = a_gid->list.le_next; 872 LIST_REMOVE(a_gid, list); 873 a_gid = t; 874 } 875 } 876 ENDGRENT(); 877 return gid; 878} 879 880 881static time_t 882pw_pwdpolicy(struct userconf * cnf, struct cargs * args) 883{ 884 time_t result = 0; 885 time_t now = time(NULL); 886 struct carg *arg = getarg(args, 'p'); 887 888 if (arg != NULL) { 889 if ((result = parse_date(now, arg->val)) == now) 890 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 891 } else if (cnf->password_days > 0) 892 result = now + ((long) cnf->password_days * 86400L); 893 return result; 894} 895 896 897static time_t 898pw_exppolicy(struct userconf * cnf, struct cargs * args) 899{ 900 time_t result = 0; 901 time_t now = time(NULL); 902 struct carg *arg = getarg(args, 'e'); 903 904 if (arg != NULL) { 905 if ((result = parse_date(now, arg->val)) == now) 906 errx(EX_DATAERR, "invalid date/time `%s'", arg->val); 907 } else if (cnf->expire_days > 0) 908 result = now + ((long) cnf->expire_days * 86400L); 909 return result; 910} 911 912 913static char * 914pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user) 915{ 916 struct carg *arg = getarg(args, 'd'); 917 918 if (arg) 919 return arg->val; 920 else { 921 static char home[128]; 922 923 if (cnf->home == NULL || *cnf->home == '\0') 924 errx(EX_CONFIG, "no base home directory set"); 925 sprintf(home, "%s/%s", cnf->home, user); 926 return home; 927 } 928} 929 930static char * 931shell_path(char const * path, char *shells[], char *sh) 932{ 933 if (sh != NULL && (*sh == '/' || *sh == '\0')) 934 return sh; /* specified full path or forced none */ 935 else { 936 char *p; 937 char paths[_UC_MAXLINE]; 938 939 /* 940 * We need to search paths 941 */ 942 strncpy(paths, path, sizeof paths); 943 paths[sizeof paths - 1] = '\0'; 944 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) { 945 int i; 946 static char shellpath[256]; 947 948 if (sh != NULL) { 949 sprintf(shellpath, "%s/%s", p, sh); 950 if (access(shellpath, X_OK) == 0) 951 return shellpath; 952 } else 953 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) { 954 sprintf(shellpath, "%s/%s", p, shells[i]); 955 if (access(shellpath, X_OK) == 0) 956 return shellpath; 957 } 958 } 959 if (sh == NULL) 960 errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh); 961 errx(EX_CONFIG, "no default shell available or defined"); 962 return NULL; 963 } 964} 965 966 967static char * 968pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell) 969{ 970 char *sh = newshell; 971 struct carg *arg = getarg(args, 's'); 972 973 if (newshell == NULL && arg != NULL) 974 sh = arg->val; 975 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default); 976} 977 978static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ."; 979 980char * 981pw_pwcrypt(char *password) 982{ 983 int i; 984 char salt[12]; 985 986 static char buf[256]; 987 988 /* 989 * Calculate a salt value 990 */ 991 if (!randinit) { 992 randinit = 1; 993#ifdef __FreeBSD__ 994 srandomdev(); 995#else 996 srandom((unsigned long) (time(NULL) ^ getpid())); 997#endif 998 } 999 for (i = 0; i < 8; i++) 1000 salt[i] = chars[random() % 63]; 1001 salt[i] = '\0'; 1002 1003 return strcpy(buf, crypt(password, salt)); 1004} 1005 1006#if defined(USE_MD5RAND) 1007u_char * 1008pw_getrand(u_char *buf, int len) /* cryptographically secure rng */ 1009{ 1010 int i; 1011 for (i=0;i<len;i+=16) { 1012 u_char ubuf[16]; 1013 1014 MD5_CTX md5_ctx; 1015 struct timeval tv, tvo; 1016 struct rusage ru; 1017 int n=0; 1018 int t; 1019 1020 MD5Init (&md5_ctx); 1021 t=getpid(); 1022 MD5Update (&md5_ctx, (u_char*)&t, sizeof t); 1023 t=getppid(); 1024 MD5Update (&md5_ctx, (u_char*)&t, sizeof t); 1025 gettimeofday (&tvo, NULL); 1026 do { 1027 getrusage (RUSAGE_SELF, &ru); 1028 MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru); 1029 gettimeofday (&tv, NULL); 1030 MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv); 1031 } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000); 1032 MD5Final (ubuf, &md5_ctx); 1033 memcpy(buf+i, ubuf, MIN(16, len-n)); 1034 } 1035 return buf; 1036} 1037 1038#else /* Portable version */ 1039 1040static u_char * 1041pw_getrand(u_char *buf, int len) 1042{ 1043 int i; 1044 1045 for (i = 0; i < len; i++) { 1046 unsigned long val = random(); 1047 /* Use all bits in the random value */ 1048 buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val); 1049 } 1050 return buf; 1051} 1052 1053#endif 1054 1055static char * 1056pw_password(struct userconf * cnf, struct cargs * args, char const * user) 1057{ 1058 int i, l; 1059 char pwbuf[32]; 1060 u_char rndbuf[sizeof pwbuf]; 1061 1062 switch (cnf->default_password) { 1063 case -1: /* Random password */ 1064 if (!randinit) { 1065 randinit = 1; 1066#ifdef __FreeBSD__ 1067 srandomdev(); 1068#else 1069 srandom((unsigned long) (time(NULL) ^ getpid())); 1070#endif 1071 } 1072 l = (random() % 8 + 8); /* 8 - 16 chars */ 1073 pw_getrand(rndbuf, l); 1074 for (i = 0; i < l; i++) 1075 pwbuf[i] = chars[rndbuf[i] % (sizeof(chars)-1)]; 1076 pwbuf[i] = '\0'; 1077 1078 /* 1079 * We give this information back to the user 1080 */ 1081 if (getarg(args, 'h') == NULL && getarg(args, 'N') == NULL) { 1082 if (isatty(STDOUT_FILENO)) 1083 printf("Password for '%s' is: ", user); 1084 printf("%s\n", pwbuf); 1085 fflush(stdout); 1086 } 1087 break; 1088 1089 case -2: /* No password at all! */ 1090 return ""; 1091 1092 case 0: /* No login - default */ 1093 default: 1094 return "*"; 1095 1096 case 1: /* user's name */ 1097 strncpy(pwbuf, user, sizeof pwbuf); 1098 pwbuf[sizeof pwbuf - 1] = '\0'; 1099 break; 1100 } 1101 return pw_pwcrypt(pwbuf); 1102} 1103 1104 1105static int 1106print_user(struct passwd * pwd, int pretty, int v7) 1107{ 1108 if (!pretty) { 1109 char buf[_UC_MAXLINE]; 1110 1111 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD); 1112 fputs(buf, stdout); 1113 } else { 1114 int j; 1115 char *p; 1116 struct group *grp = GETGRGID(pwd->pw_gid); 1117 char uname[60] = "User &", office[60] = "[None]", 1118 wphone[60] = "[None]", hphone[60] = "[None]"; 1119 char acexpire[32] = "[None]", pwexpire[32] = "[None]"; 1120 struct tm * tptr; 1121 1122 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) { 1123 strncpy(uname, p, sizeof uname); 1124 uname[sizeof uname - 1] = '\0'; 1125 if ((p = strtok(NULL, ",")) != NULL) { 1126 strncpy(office, p, sizeof office); 1127 office[sizeof office - 1] = '\0'; 1128 if ((p = strtok(NULL, ",")) != NULL) { 1129 strncpy(wphone, p, sizeof wphone); 1130 wphone[sizeof wphone - 1] = '\0'; 1131 if ((p = strtok(NULL, "")) != NULL) { 1132 strncpy(hphone, p, sizeof hphone); 1133 hphone[sizeof hphone - 1] = '\0'; 1134 } 1135 } 1136 } 1137 } 1138 /* 1139 * Handle '&' in gecos field 1140 */ 1141 if ((p = strchr(uname, '&')) != NULL) { 1142 int l = strlen(pwd->pw_name); 1143 int m = strlen(p); 1144 1145 memmove(p + l, p + 1, m); 1146 memmove(p, pwd->pw_name, l); 1147 *p = (char) toupper((unsigned char)*p); 1148 } 1149 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL) 1150 strftime(acexpire, sizeof acexpire, "%a %Ef %Y %X", tptr); 1151 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL) 1152 strftime(pwexpire, sizeof pwexpire, "%a %Ef %Y %X", tptr); 1153 printf("Login Name: %-15s #%-12ld Group: %-15s #%ld\n" 1154 " Full Name: %s\n" 1155 " Home: %-26.26s Class: %s\n" 1156 " Shell: %-26.26s Office: %s\n" 1157 "Work Phone: %-26.26s Home Phone: %s\n" 1158 "Acc Expire: %-26.26s Pwd Expire: %s\n", 1159 pwd->pw_name, (long) pwd->pw_uid, 1160 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid, 1161 uname, pwd->pw_dir, pwd->pw_class, 1162 pwd->pw_shell, office, wphone, hphone, 1163 acexpire, pwexpire); 1164 SETGRENT(); 1165 j = 0; 1166 while ((grp=GETGRENT()) != NULL) 1167 { 1168 int i = 0; 1169 while (grp->gr_mem[i] != NULL) 1170 { 1171 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) 1172 { 1173 printf(j++ == 0 ? " Groups: %s" : ",%s", grp->gr_name); 1174 break; 1175 } 1176 ++i; 1177 } 1178 } 1179 ENDGRENT(); 1180 printf("%s", j ? "\n" : ""); 1181 } 1182 return EXIT_SUCCESS; 1183} 1184 1185char * 1186pw_checkname(u_char *name, int gecos) 1187{ 1188 int l = 0; 1189 char const *notch = gecos ? ":!@" : " ,\t:+&#%$^()!@~*?<>=|\\/\""; 1190 1191 while (name[l]) { 1192 if (strchr(notch, name[l]) != NULL || name[l] < ' ' || name[l] == 127 || 1193 (!gecos && l==0 && name[l] == '-') || /* leading '-' */ 1194 (!gecos && name[l] & 0x80)) /* 8-bit */ 1195 errx(EX_DATAERR, (name[l] >= ' ' && name[l] < 127) 1196 ? "invalid character `%c' in field" 1197 : "invalid character 0x%02x in field", 1198 name[l]); 1199 ++l; 1200 } 1201 if (!gecos && l > LOGNAMESIZE) 1202 errx(EX_DATAERR, "name too long `%s'", name); 1203 return (char *)name; 1204} 1205 1206 1207static void 1208rmat(uid_t uid) 1209{ 1210 DIR *d = opendir("/var/at/jobs"); 1211 1212 if (d != NULL) { 1213 struct dirent *e; 1214 1215 while ((e = readdir(d)) != NULL) { 1216 struct stat st; 1217 1218 if (strncmp(e->d_name, ".lock", 5) != 0 && 1219 stat(e->d_name, &st) == 0 && 1220 !S_ISDIR(st.st_mode) && 1221 st.st_uid == uid) { 1222 char tmp[MAXPATHLEN]; 1223 1224 sprintf(tmp, "/usr/bin/atrm %s", e->d_name); 1225 system(tmp); 1226 } 1227 } 1228 closedir(d); 1229 } 1230} 1231 1232static void 1233rmskey(char const * name) 1234{ 1235 static const char etcskey[] = "/etc/skeykeys"; 1236 FILE *fp = fopen(etcskey, "r+"); 1237 1238 if (fp != NULL) { 1239 char tmp[1024]; 1240 off_t atofs = 0; 1241 int length = strlen(name); 1242 1243 while (fgets(tmp, sizeof tmp, fp) != NULL) { 1244 if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') { 1245 if (fseek(fp, atofs, SEEK_SET) == 0) { 1246 fwrite("#", 1, 1, fp); /* Comment username out */ 1247 } 1248 break; 1249 } 1250 atofs = ftell(fp); 1251 } 1252 /* 1253 * If we got an error of any sort, don't update! 1254 */ 1255 fclose(fp); 1256 } 1257} 1258 1259