login_pam.c revision 1.2
1 /* $NetBSD: login_pam.c,v 1.2 2005/02/01 17:57:16 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT( 35 "@(#) Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994\n\ 36 The Regents of the University of California. All rights reserved.\n"); 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)login.c 8.4 (Berkeley) 4/2/94"; 42 #endif 43 __RCSID("$NetBSD: login_pam.c,v 1.2 2005/02/01 17:57:16 christos Exp $"); 44 #endif /* not lint */ 45 46 /* 47 * login [ name ] 48 * login -h hostname (for telnetd, etc.) 49 * login -f name (for pre-authenticated login: datakit, xterm, etc.) 50 */ 51 52 #include <sys/param.h> 53 #include <sys/stat.h> 54 #include <sys/time.h> 55 #include <sys/resource.h> 56 #include <sys/file.h> 57 #include <sys/wait.h> 58 #include <sys/socket.h> 59 60 #include <err.h> 61 #include <errno.h> 62 #include <grp.h> 63 #include <pwd.h> 64 #include <setjmp.h> 65 #include <signal.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <syslog.h> 70 #include <time.h> 71 #include <ttyent.h> 72 #include <tzfile.h> 73 #include <unistd.h> 74 #include <util.h> 75 #include <login_cap.h> 76 #include <vis.h> 77 78 #include <security/pam_appl.h> 79 #include <security/openpam.h> 80 81 #include "pathnames.h" 82 83 void badlogin (char *); 84 static void update_db (int); 85 void getloginname (void); 86 int main (int, char *[]); 87 void motd (char *); 88 int rootterm (char *); 89 void sigint (int); 90 void sleepexit (int); 91 const char *stypeof (const char *); 92 void timedout (int); 93 void decode_ss (const char *); 94 void usage (void); 95 96 static struct pam_conv pamc = { openpam_ttyconv, NULL }; 97 98 #define TTYGRPNAME "tty" /* name of group to own ttys */ 99 100 #define DEFAULT_BACKOFF 3 101 #define DEFAULT_RETRIES 10 102 103 /* 104 * This bounds the time given to login. Not a define so it can 105 * be patched on machines where it's too small. 106 */ 107 u_int timeout = 300; 108 109 struct passwd *pwd; 110 int failures, have_ss; 111 char term[64], *envinit[1], *hostname, *username, *tty, *nested; 112 struct timeval now; 113 struct sockaddr_storage ss; 114 115 extern const char copyrightstr[]; 116 117 int 118 main(int argc, char *argv[]) 119 { 120 extern char **environ; 121 struct stat st; 122 int ask, ch, cnt, fflag, hflag, pflag, sflag, quietlog, rootlogin; 123 int auth_passed; 124 int Fflag; 125 uid_t uid, saved_uid; 126 gid_t saved_gid, saved_gids[NGROUPS_MAX]; 127 int nsaved_gids; 128 char *domain, *p, *ttyn, *pwprompt; 129 char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10]; 130 char localhost[MAXHOSTNAMELEN + 1]; 131 int need_chpass, require_chpass; 132 int login_retries = DEFAULT_RETRIES, 133 login_backoff = DEFAULT_BACKOFF; 134 char *shell = NULL; 135 login_cap_t *lc = NULL; 136 pam_handle_t *pamh = NULL; 137 int pam_err; 138 void *oint; 139 void *oabrt; 140 const void *newuser; 141 int pam_silent = PAM_SILENT; 142 pid_t xpid, pid; 143 int status; 144 char *saved_term; 145 char **pamenv; 146 147 tbuf[0] = '\0'; 148 pwprompt = NULL; 149 nested = NULL; 150 need_chpass = require_chpass = 0; 151 152 (void)signal(SIGALRM, timedout); 153 (void)alarm(timeout); 154 (void)signal(SIGQUIT, SIG_IGN); 155 (void)signal(SIGINT, SIG_IGN); 156 (void)setpriority(PRIO_PROCESS, 0, 0); 157 158 openlog("login", 0, LOG_AUTH); 159 160 /* 161 * -p is used by getty to tell login not to destroy the environment 162 * -f is used to skip a second login authentication 163 * -h is used by other servers to pass the name of the remote host to 164 * login so that it may be placed in utmp/utmpx and wtmp/wtmpx 165 * -a in addition to -h, a server my supply -a to pass the actual 166 * server address. 167 * -s is used to force use of S/Key or equivalent. 168 */ 169 domain = NULL; 170 if (gethostname(localhost, sizeof(localhost)) < 0) 171 syslog(LOG_ERR, "couldn't get local hostname: %m"); 172 else 173 domain = strchr(localhost, '.'); 174 localhost[sizeof(localhost) - 1] = '\0'; 175 176 Fflag = fflag = hflag = pflag = sflag = 0; 177 have_ss = 0; 178 uid = getuid(); 179 while ((ch = getopt(argc, argv, "a:Ffh:ps")) != -1) 180 switch (ch) { 181 case 'a': 182 if (uid) 183 errx(1, "-a option: %s", strerror(EPERM)); 184 decode_ss(optarg); 185 break; 186 case 'F': 187 Fflag = 1; 188 /* FALLTHROUGH */ 189 case 'f': 190 fflag = 1; 191 break; 192 case 'h': 193 if (uid) 194 errx(1, "-h option: %s", strerror(EPERM)); 195 hflag = 1; 196 if (domain && (p = strchr(optarg, '.')) != NULL && 197 strcasecmp(p, domain) == 0) 198 *p = '\0'; 199 hostname = optarg; 200 break; 201 case 'p': 202 pflag = 1; 203 break; 204 case 's': 205 sflag = 1; 206 break; 207 default: 208 case '?': 209 usage(); 210 break; 211 } 212 argc -= optind; 213 argv += optind; 214 215 if (*argv) { 216 username = *argv; 217 ask = 0; 218 } else 219 ask = 1; 220 221 for (cnt = getdtablesize(); cnt > 2; cnt--) 222 (void)close(cnt); 223 224 ttyn = ttyname(STDIN_FILENO); 225 if (ttyn == NULL || *ttyn == '\0') { 226 (void)snprintf(tname, sizeof(tname), "%s??", _PATH_TTY); 227 ttyn = tname; 228 } 229 if ((tty = strrchr(ttyn, '/')) != NULL) 230 ++tty; 231 else 232 tty = ttyn; 233 234 if (issetugid()) { 235 nested = strdup(user_from_uid(getuid(), 0)); 236 if (nested == NULL) { 237 syslog(LOG_ERR, "strdup: %m"); 238 sleepexit(1); 239 } 240 } 241 242 /* Get "login-retries" and "login-backoff" from default class */ 243 if ((lc = login_getclass(NULL)) != NULL) { 244 login_retries = (int)login_getcapnum(lc, "login-retries", 245 DEFAULT_RETRIES, DEFAULT_RETRIES); 246 login_backoff = (int)login_getcapnum(lc, "login-backoff", 247 DEFAULT_BACKOFF, DEFAULT_BACKOFF); 248 login_close(lc); 249 lc = NULL; 250 } 251 252 253 for (cnt = 0;; ask = 1) { 254 if (ask) { 255 fflag = 0; 256 getloginname(); 257 } 258 rootlogin = 0; 259 auth_passed = 0; 260 if (strlen(username) > MAXLOGNAME) 261 username[MAXLOGNAME] = '\0'; 262 263 /* 264 * Note if trying multiple user names; log failures for 265 * previous user name, but don't bother logging one failure 266 * for nonexistent name (mistyped username). 267 */ 268 if (failures && strcmp(tbuf, username)) { 269 if (failures > (pwd ? 0 : 1)) 270 badlogin(tbuf); 271 failures = 0; 272 } 273 274 #define PAM_END(msg) do { \ 275 syslog(LOG_ERR, "%s: %s", msg, pam_strerror(pamh, pam_err)); \ 276 warnx("%s: %s", msg, pam_strerror(pamh, pam_err)); \ 277 pam_end(pamh, pam_err); \ 278 sleepexit(1); \ 279 } while (/*CONSTCOND*/0) 280 281 pam_err = pam_start("login", username, &pamc, &pamh); 282 if (pam_err != PAM_SUCCESS) { 283 if (pamh != NULL) 284 PAM_END("pam_start"); 285 /* Things went really bad... */ 286 syslog(LOG_ERR, "pam_start failed: %s", 287 pam_strerror(pamh, pam_err)); 288 errx(1, "pam_start failed"); 289 } 290 291 #define PAM_SET_ITEM(item, var) do { \ 292 pam_err = pam_set_item(pamh, (item), (var)); \ 293 if (pam_err != PAM_SUCCESS) \ 294 PAM_END("pam_set_item(" # item ")"); \ 295 } while (/*CONSTCOND*/0) 296 297 /* 298 * Fill hostname and tty 299 */ 300 PAM_SET_ITEM(PAM_RHOST, hostname); 301 PAM_SET_ITEM(PAM_TTY, tty); 302 if (have_ss) 303 PAM_SET_ITEM(PAM_SOCKADDR, &ss); 304 305 pwd = getpwnam(username); 306 307 /* 308 * Establish the class now, before we might goto 309 * within the next block. pwd can be NULL since it 310 * falls back to the "default" class if it is. 311 */ 312 lc = login_getclass(pwd ? pwd->pw_class : NULL); 313 314 /* 315 * if we have a valid account name, and it doesn't have a 316 * password, or the -f option was specified and the caller 317 * is root or the caller isn't changing their uid, don't 318 * authenticate. 319 */ 320 if (pwd) { 321 if (pwd->pw_uid == 0) 322 rootlogin = 1; 323 324 if (fflag && (uid == 0 || uid == pwd->pw_uid)) { 325 /* already authenticated */ 326 auth_passed = 1; 327 goto skip_auth; 328 } 329 } 330 331 (void)setpriority(PRIO_PROCESS, 0, -4); 332 333 switch(pam_err = pam_authenticate(pamh, pam_silent)) { 334 case PAM_SUCCESS: 335 /* 336 * PAM can change the user, refresh 337 * username, pwd, and lc. 338 */ 339 pam_err = pam_get_item(pamh, PAM_USER, &newuser); 340 if (pam_err != PAM_SUCCESS) 341 PAM_END("pam_get_item(PAM_USER)"); 342 343 username = (char *)newuser; 344 pwd = getpwnam(username); 345 lc = login_getpwclass(pwd); 346 auth_passed = 1; 347 348 switch (pam_err = pam_acct_mgmt(pamh, pam_silent)) { 349 case PAM_SUCCESS: 350 break; 351 352 case PAM_NEW_AUTHTOK_REQD: 353 pam_err = pam_chauthtok(pamh, 354 pam_silent|PAM_CHANGE_EXPIRED_AUTHTOK); 355 356 if (pam_err != PAM_SUCCESS) 357 PAM_END("pam_chauthtok"); 358 break; 359 360 default: 361 PAM_END("pam_acct_mgmt"); 362 break; 363 } 364 break; 365 366 case PAM_AUTH_ERR: 367 case PAM_USER_UNKNOWN: 368 case PAM_MAXTRIES: 369 auth_passed = 0; 370 break; 371 372 default: 373 PAM_END("pam_authenticate"); 374 break; 375 } 376 377 (void)setpriority(PRIO_PROCESS, 0, 0); 378 379 skip_auth: 380 /* 381 * If the user exists and authentication passed, 382 * get out of the loop and login the user. 383 */ 384 if (pwd && auth_passed) 385 break; 386 387 (void)printf("Login incorrect\n"); 388 failures++; 389 cnt++; 390 /* we allow 10 tries, but after 3 we start backing off */ 391 if (cnt > login_backoff) { 392 if (cnt >= login_retries) { 393 badlogin(username); 394 pam_end(pamh, PAM_SUCCESS); 395 sleepexit(1); 396 } 397 sleep((u_int)((cnt - 3) * 5)); 398 } 399 } 400 401 /* committed to login -- turn off timeout */ 402 (void)alarm((u_int)0); 403 404 endpwent(); 405 406 quietlog = login_getcapbool(lc, "hushlogin", 0); 407 408 /* 409 * Temporarily give up special privileges so we can change 410 * into NFS-mounted homes that are exported for non-root 411 * access and have mode 7x0 412 */ 413 saved_uid = geteuid(); 414 saved_gid = getegid(); 415 nsaved_gids = getgroups(NGROUPS_MAX, saved_gids); 416 417 (void)setegid(pwd->pw_gid); 418 initgroups(username, pwd->pw_gid); 419 (void)seteuid(pwd->pw_uid); 420 421 if (chdir(pwd->pw_dir) != 0) { 422 if (login_getcapbool(lc, "requirehome", 0)) { 423 (void)printf("Home directory %s required\n", 424 pwd->pw_dir); 425 pam_end(pamh, PAM_SUCCESS); 426 exit(1); 427 } 428 429 (void)printf("No home directory %s!\n", pwd->pw_dir); 430 if (chdir("/")) { 431 pam_end(pamh, PAM_SUCCESS); 432 exit(0); 433 } 434 pwd->pw_dir = "/"; 435 (void)printf("Logging in with home = \"/\".\n"); 436 } 437 438 if (!quietlog) { 439 quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0; 440 pam_silent = 0; 441 } 442 443 /* regain special privileges */ 444 setegid(saved_gid); 445 setgroups(nsaved_gids, saved_gids); 446 seteuid(saved_uid); 447 448 /* Nothing else left to fail -- really log in. */ 449 update_db(quietlog); 450 451 if (nested == NULL && setusercontext(lc, pwd, pwd->pw_uid, 452 LOGIN_SETLOGIN) != 0) { 453 syslog(LOG_ERR, "setusercontext failed"); 454 pam_end(pamh, PAM_SUCCESS); 455 exit(1); 456 } 457 458 if (tty[sizeof("tty")-1] == 'd') 459 syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name); 460 461 /* If fflag is on, assume caller/authenticator has logged root login. */ 462 if (rootlogin && fflag == 0) { 463 if (hostname) 464 syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s", 465 username, tty, hostname); 466 else 467 syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", 468 username, tty); 469 } 470 471 /* 472 * Establish groups 473 */ 474 if (setusercontext(lc, pwd, pwd->pw_uid, LOGIN_SETGROUP) != 0) { 475 syslog(LOG_ERR, "setusercontext failed"); 476 pam_end(pamh, PAM_SUCCESS); 477 exit(1); 478 } 479 480 pam_err = pam_setcred(pamh, pam_silent|PAM_ESTABLISH_CRED); 481 if (pam_err != PAM_SUCCESS) 482 PAM_END("pam_setcred"); 483 484 pam_err = pam_open_session(pamh, pam_silent); 485 if (pam_err != PAM_SUCCESS) 486 PAM_END("pam_open_session"); 487 488 /* 489 * Fork because we need to call pam_closesession as root. 490 * Make sure signals cannot kill the parent. 491 * This is copied from crontab(8), which has to 492 * cope with a similar situation. 493 */ 494 oint = signal(SIGINT, SIG_IGN); 495 oabrt = signal(SIGABRT, SIG_IGN); 496 497 switch(pid = fork()) { 498 case -1: 499 pam_err = pam_close_session(pamh, 0); 500 if (pam_err != PAM_SUCCESS) { 501 syslog(LOG_ERR, "pam_close_session: %s", 502 pam_strerror(pamh, pam_err)); 503 warnx("pam_close_session: %s", 504 pam_strerror(pamh, pam_err)); 505 } 506 syslog(LOG_ERR, "fork failed: %m"); 507 warn("fork failed"); 508 pam_end(pamh, pam_err); 509 exit(1); 510 break; 511 512 case 0: /* Child */ 513 break; 514 515 default: 516 /* 517 * Parent: wait for the child to terminate 518 * and call pam_close_session. 519 */ 520 if ((xpid = wait(&status)) != pid) { 521 pam_err = pam_close_session(pamh, 0); 522 if (pam_err != PAM_SUCCESS) { 523 syslog(LOG_ERR, 524 "pam_close_session: %s", 525 pam_strerror(pamh, pam_err)); 526 warnx("pam_close_session: %s", 527 pam_strerror(pamh, pam_err)); 528 } 529 pam_end(pamh, pam_err); 530 warnx("wrong PID: %d != %d", pid, xpid); 531 exit(1); 532 } 533 534 (void)signal(SIGINT, oint); 535 (void)signal(SIGABRT, oabrt); 536 if ((pam_err = pam_close_session(pamh, 0)) != PAM_SUCCESS) { 537 syslog(LOG_ERR, "pam_close_session: %s", 538 pam_strerror(pamh, pam_err)); 539 warnx("pam_close_session: %s", 540 pam_strerror(pamh, pam_err)); 541 } 542 pam_end(pamh, PAM_SUCCESS); 543 exit(0); 544 break; 545 } 546 547 /* 548 * The child: starting here, we don't have to care about 549 * handling PAM issues if we exit, the parent will do the 550 * job when we exit. 551 * 552 * Destroy environment unless user has requested its preservation. 553 * Try to preserve TERM anyway. 554 */ 555 saved_term = getenv("TERM"); 556 if (!pflag) { 557 environ = envinit; 558 if (saved_term) 559 setenv("TERM", saved_term, 0); 560 } 561 562 if (*pwd->pw_shell == '\0') 563 pwd->pw_shell = _PATH_BSHELL; 564 565 shell = login_getcapstr(lc, "shell", pwd->pw_shell, pwd->pw_shell); 566 if (*shell == '\0') 567 shell = pwd->pw_shell; 568 569 if ((pwd->pw_shell = strdup(shell)) == NULL) { 570 syslog(LOG_ERR, "Cannot alloc mem"); 571 exit(1); 572 } 573 574 (void)setenv("HOME", pwd->pw_dir, 1); 575 (void)setenv("SHELL", pwd->pw_shell, 1); 576 if (term[0] == '\0') { 577 char *tt = (char *)stypeof(tty); 578 579 if (tt == NULL) 580 tt = login_getcapstr(lc, "term", NULL, NULL); 581 582 /* unknown term -> "su" */ 583 (void)strlcpy(term, tt != NULL ? tt : "su", sizeof(term)); 584 } 585 (void)setenv("TERM", term, 0); 586 (void)setenv("LOGNAME", pwd->pw_name, 1); 587 (void)setenv("USER", pwd->pw_name, 1); 588 589 /* 590 * Add PAM environement 591 */ 592 if ((pamenv = pam_getenvlist(pamh)) != NULL) { 593 char **envitem; 594 595 for (envitem = pamenv; *envitem; envitem++) { 596 putenv(*envitem); 597 free(*envitem); 598 } 599 600 free(pamenv); 601 } 602 603 /* This drops root privs */ 604 if (setusercontext(lc, pwd, pwd->pw_uid, 605 (LOGIN_SETALL & ~LOGIN_SETLOGIN)) != 0) { 606 syslog(LOG_ERR, "setusercontext failed"); 607 exit(1); 608 } 609 610 if (!quietlog) { 611 char *fname; 612 613 fname = login_getcapstr(lc, "copyright", NULL, NULL); 614 if (fname != NULL && access(fname, F_OK) == 0) 615 motd(fname); 616 else 617 (void)printf("%s", copyrightstr); 618 619 fname = login_getcapstr(lc, "welcome", NULL, NULL); 620 if (fname == NULL || access(fname, F_OK) != 0) 621 fname = _PATH_MOTDFILE; 622 motd(fname); 623 624 (void)snprintf(tbuf, 625 sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 626 if (stat(tbuf, &st) == 0 && st.st_size != 0) 627 (void)printf("You have %smail.\n", 628 (st.st_mtime > st.st_atime) ? "new " : ""); 629 } 630 631 login_close(lc); 632 633 (void)signal(SIGALRM, SIG_DFL); 634 (void)signal(SIGQUIT, SIG_DFL); 635 (void)signal(SIGINT, SIG_DFL); 636 (void)signal(SIGTSTP, SIG_IGN); 637 638 tbuf[0] = '-'; 639 (void)strlcpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ? 640 p + 1 : pwd->pw_shell, sizeof(tbuf) - 1); 641 642 execlp(pwd->pw_shell, tbuf, 0); 643 err(1, "%s", pwd->pw_shell); 644 } 645 646 #define NBUFSIZ (MAXLOGNAME + 1) 647 648 649 void 650 getloginname(void) 651 { 652 int ch; 653 char *p; 654 static char nbuf[NBUFSIZ]; 655 656 for (;;) { 657 (void)printf("login: "); 658 for (p = nbuf; (ch = getchar()) != '\n'; ) { 659 if (ch == EOF) { 660 badlogin(username); 661 exit(0); 662 } 663 if (p < nbuf + (NBUFSIZ - 1)) 664 *p++ = ch; 665 } 666 if (p > nbuf) { 667 if (nbuf[0] == '-') 668 (void)fprintf(stderr, 669 "login names may not start with '-'.\n"); 670 else { 671 *p = '\0'; 672 username = nbuf; 673 break; 674 } 675 } 676 } 677 } 678 679 int 680 rootterm(char *ttyn) 681 { 682 struct ttyent *t; 683 684 return ((t = getttynam(ttyn)) && t->ty_status & TTY_SECURE); 685 } 686 687 jmp_buf motdinterrupt; 688 689 void 690 motd(char *fname) 691 { 692 int fd, nchars; 693 sig_t oldint; 694 char tbuf[8192]; 695 696 if ((fd = open(fname ? fname : _PATH_MOTDFILE, O_RDONLY, 0)) < 0) 697 return; 698 oldint = signal(SIGINT, sigint); 699 if (setjmp(motdinterrupt) == 0) 700 while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) 701 (void)write(fileno(stdout), tbuf, nchars); 702 (void)signal(SIGINT, oldint); 703 (void)close(fd); 704 } 705 706 /* ARGSUSED */ 707 void 708 sigint(int signo) 709 { 710 711 longjmp(motdinterrupt, 1); 712 } 713 714 /* ARGSUSED */ 715 void 716 timedout(int signo) 717 { 718 719 (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout); 720 exit(0); 721 } 722 723 static void 724 update_db(int quietlog) 725 { 726 if (nested != NULL) { 727 if (hostname != NULL) 728 syslog(LOG_NOTICE, "%s to %s on tty %s from %s", 729 nested, pwd->pw_name, tty, hostname); 730 else 731 syslog(LOG_NOTICE, "%s to %s on tty %s", nested, 732 pwd->pw_name, tty); 733 734 return; 735 } 736 if (hostname != NULL && have_ss == 0) { 737 socklen_t len = sizeof(ss); 738 (void)getpeername(STDIN_FILENO, (struct sockaddr *)&ss, &len); 739 } 740 (void)gettimeofday(&now, NULL); 741 } 742 743 void 744 badlogin(char *name) 745 { 746 747 if (failures == 0) 748 return; 749 if (hostname) { 750 syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s", 751 failures, failures > 1 ? "S" : "", hostname); 752 syslog(LOG_AUTHPRIV|LOG_NOTICE, 753 "%d LOGIN FAILURE%s FROM %s, %s", 754 failures, failures > 1 ? "S" : "", hostname, name); 755 } else { 756 syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s", 757 failures, failures > 1 ? "S" : "", tty); 758 syslog(LOG_AUTHPRIV|LOG_NOTICE, 759 "%d LOGIN FAILURE%s ON %s, %s", 760 failures, failures > 1 ? "S" : "", tty, name); 761 } 762 } 763 764 const char * 765 stypeof(const char *ttyid) 766 { 767 struct ttyent *t; 768 769 return (ttyid && (t = getttynam(ttyid)) ? t->ty_type : NULL); 770 } 771 772 void 773 sleepexit(int eval) 774 { 775 776 (void)sleep(5); 777 exit(eval); 778 } 779 780 void 781 decode_ss(const char *arg) 782 { 783 struct sockaddr_storage *ssp; 784 size_t len = strlen(arg); 785 786 if (len > sizeof(*ssp) * 4 + 1 || len < sizeof(*ssp)) 787 errx(1, "Bad argument"); 788 789 if ((ssp = malloc(len)) == NULL) 790 err(1, NULL); 791 792 if (strunvis((char *)ssp, arg) != sizeof(*ssp)) 793 errx(1, "Decoding error"); 794 795 (void)memcpy(&ss, ssp, sizeof(ss)); 796 have_ss = 1; 797 } 798 799 void 800 usage(void) 801 { 802 (void)fprintf(stderr, 803 "Usage: %s [-Ffps] [-a address] [-h hostname] [username]\n", 804 getprogname()); 805 exit(1); 806 } 807
Indexes created Tue Sep 30 11:09:46 GMT 2025