login_pam.c revision 1.1
1 /* $NetBSD: login_pam.c,v 1.1 2005/01/23 09:47:43 manu 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 1.1 2005/01/23 09:47:43 manu 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); 302 303 pwd = getpwnam(username); 304 305 /* 306 * Establish the class now, before we might goto 307 * within the next block. pwd can be NULL since it 308 * falls back to the "default" class if it is. 309 */ 310 lc = login_getclass(pwd ? pwd->pw_class : NULL); 311 312 /* 313 * if we have a valid account name, and it doesn't have a 314 * password, or the -f option was specified and the caller 315 * is root or the caller isn't changing their uid, don't 316 * authenticate. 317 */ 318 if (pwd) { 319 if (pwd->pw_uid == 0) 320 rootlogin = 1; 321 322 if (fflag && (uid == 0 || uid == pwd->pw_uid)) { 323 /* already authenticated */ 324 auth_passed = 1; 325 goto skip_auth; 326 } 327 } 328 329 (void)setpriority(PRIO_PROCESS, 0, -4); 330 331 switch(pam_err = pam_authenticate(pamh, pam_silent)) { 332 case PAM_SUCCESS: 333 /* 334 * PAM can change the user, refresh 335 * username, pwd, and lc. 336 */ 337 pam_err = pam_get_item(pamh, PAM_USER, &newuser); 338 if (pam_err != PAM_SUCCESS) 339 PAM_END("pam_get_item(PAM_USER)"); 340 341 username = (char *)newuser; 342 pwd = getpwnam(username); 343 lc = login_getpwclass(pwd); 344 auth_passed = 1; 345 346 switch (pam_err = pam_acct_mgmt(pamh, pam_silent)) { 347 case PAM_SUCCESS: 348 break; 349 350 case PAM_NEW_AUTHTOK_REQD: 351 pam_err = pam_chauthtok(pamh, 352 pam_silent|PAM_CHANGE_EXPIRED_AUTHTOK); 353 354 if (pam_err != PAM_SUCCESS) 355 PAM_END("pam_chauthtok"); 356 break; 357 358 default: 359 PAM_END("pam_acct_mgmt"); 360 break; 361 } 362 break; 363 364 case PAM_AUTH_ERR: 365 case PAM_USER_UNKNOWN: 366 case PAM_MAXTRIES: 367 auth_passed = 0; 368 break; 369 370 default: 371 PAM_END("pam_authenticate"); 372 break; 373 } 374 375 (void)setpriority(PRIO_PROCESS, 0, 0); 376 377 skip_auth: 378 /* 379 * If the user exists and authentication passed, 380 * get out of the loop and login the user. 381 */ 382 if (pwd && auth_passed) 383 break; 384 385 (void)printf("Login incorrect\n"); 386 failures++; 387 cnt++; 388 /* we allow 10 tries, but after 3 we start backing off */ 389 if (cnt > login_backoff) { 390 if (cnt >= login_retries) { 391 badlogin(username); 392 pam_end(pamh, PAM_SUCCESS); 393 sleepexit(1); 394 } 395 sleep((u_int)((cnt - 3) * 5)); 396 } 397 } 398 399 /* committed to login -- turn off timeout */ 400 (void)alarm((u_int)0); 401 402 endpwent(); 403 404 quietlog = login_getcapbool(lc, "hushlogin", 0); 405 406 /* 407 * Temporarily give up special privileges so we can change 408 * into NFS-mounted homes that are exported for non-root 409 * access and have mode 7x0 410 */ 411 saved_uid = geteuid(); 412 saved_gid = getegid(); 413 nsaved_gids = getgroups(NGROUPS_MAX, saved_gids); 414 415 (void)setegid(pwd->pw_gid); 416 initgroups(username, pwd->pw_gid); 417 (void)seteuid(pwd->pw_uid); 418 419 if (chdir(pwd->pw_dir) != 0) { 420 if (login_getcapbool(lc, "requirehome", 0)) { 421 (void)printf("Home directory %s required\n", 422 pwd->pw_dir); 423 pam_end(pamh, PAM_SUCCESS); 424 exit(1); 425 } 426 427 (void)printf("No home directory %s!\n", pwd->pw_dir); 428 if (chdir("/")) { 429 pam_end(pamh, PAM_SUCCESS); 430 exit(0); 431 } 432 pwd->pw_dir = "/"; 433 (void)printf("Logging in with home = \"/\".\n"); 434 } 435 436 if (!quietlog) { 437 quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0; 438 pam_silent = 0; 439 } 440 441 /* regain special privileges */ 442 setegid(saved_gid); 443 setgroups(nsaved_gids, saved_gids); 444 seteuid(saved_uid); 445 446 /* Nothing else left to fail -- really log in. */ 447 update_db(quietlog); 448 449 if (nested == NULL && setusercontext(lc, pwd, pwd->pw_uid, 450 LOGIN_SETLOGIN) != 0) { 451 syslog(LOG_ERR, "setusercontext failed"); 452 pam_end(pamh, PAM_SUCCESS); 453 exit(1); 454 } 455 456 if (tty[sizeof("tty")-1] == 'd') 457 syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name); 458 459 /* If fflag is on, assume caller/authenticator has logged root login. */ 460 if (rootlogin && fflag == 0) { 461 if (hostname) 462 syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s", 463 username, tty, hostname); 464 else 465 syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", 466 username, tty); 467 } 468 469 /* 470 * Establish groups 471 */ 472 if (setusercontext(lc, pwd, pwd->pw_uid, LOGIN_SETGROUP) != 0) { 473 syslog(LOG_ERR, "setusercontext failed"); 474 pam_end(pamh, PAM_SUCCESS); 475 exit(1); 476 } 477 478 pam_err = pam_setcred(pamh, pam_silent|PAM_ESTABLISH_CRED); 479 if (pam_err != PAM_SUCCESS) 480 PAM_END("pam_setcred"); 481 482 pam_err = pam_open_session(pamh, pam_silent); 483 if (pam_err != PAM_SUCCESS) 484 PAM_END("pam_open_session"); 485 486 /* 487 * Fork because we need to call pam_closesession as root. 488 * Make sure signals cannot kill the parent. 489 * This is copied from crontab(8), which has to 490 * cope with a similar situation. 491 */ 492 oint = signal(SIGINT, SIG_IGN); 493 oabrt = signal(SIGABRT, SIG_IGN); 494 495 switch(pid = fork()) { 496 case -1: 497 pam_err = pam_close_session(pamh, 0); 498 if (pam_err != PAM_SUCCESS) { 499 syslog(LOG_ERR, "pam_close_session: %s", 500 pam_strerror(pamh, pam_err)); 501 warnx("pam_close_session: %s", 502 pam_strerror(pamh, pam_err)); 503 } 504 syslog(LOG_ERR, "fork failed: %m"); 505 warn("fork failed"); 506 pam_end(pamh, pam_err); 507 exit(1); 508 break; 509 510 case 0: /* Child */ 511 break; 512 513 default: 514 /* 515 * Parent: wait for the child to terminate 516 * and call pam_close_session. 517 */ 518 if ((xpid = wait(&status)) != pid) { 519 pam_err = pam_close_session(pamh, 0); 520 if (pam_err != PAM_SUCCESS) { 521 syslog(LOG_ERR, 522 "pam_close_session: %s", 523 pam_strerror(pamh, pam_err)); 524 warnx("pam_close_session: %s", 525 pam_strerror(pamh, pam_err)); 526 } 527 pam_end(pamh, pam_err); 528 warnx("wrong PID: %d != %d", pid, xpid); 529 exit(1); 530 } 531 532 (void)signal(SIGINT, oint); 533 (void)signal(SIGABRT, oabrt); 534 if ((pam_err = pam_close_session(pamh, 0)) != PAM_SUCCESS) { 535 syslog(LOG_ERR, "pam_close_session: %s", 536 pam_strerror(pamh, pam_err)); 537 warnx("pam_close_session: %s", 538 pam_strerror(pamh, pam_err)); 539 } 540 pam_end(pamh, PAM_SUCCESS); 541 exit(0); 542 break; 543 } 544 545 /* 546 * The child: starting here, we don't have to care about 547 * handling PAM issues if we exit, the parent will do the 548 * job when we exit. 549 * 550 * Destroy environment unless user has requested its preservation. 551 * Try to preserve TERM anyway. 552 */ 553 saved_term = getenv("TERM"); 554 if (!pflag) { 555 environ = envinit; 556 if (saved_term) 557 setenv("TERM", saved_term, 0); 558 } 559 560 if (*pwd->pw_shell == '\0') 561 pwd->pw_shell = _PATH_BSHELL; 562 563 shell = login_getcapstr(lc, "shell", pwd->pw_shell, pwd->pw_shell); 564 if (*shell == '\0') 565 shell = pwd->pw_shell; 566 567 if ((pwd->pw_shell = strdup(shell)) == NULL) { 568 syslog(LOG_ERR, "Cannot alloc mem"); 569 exit(1); 570 } 571 572 (void)setenv("HOME", pwd->pw_dir, 1); 573 (void)setenv("SHELL", pwd->pw_shell, 1); 574 if (term[0] == '\0') { 575 char *tt = (char *)stypeof(tty); 576 577 if (tt == NULL) 578 tt = login_getcapstr(lc, "term", NULL, NULL); 579 580 /* unknown term -> "su" */ 581 (void)strlcpy(term, tt != NULL ? tt : "su", sizeof(term)); 582 } 583 (void)setenv("TERM", term, 0); 584 (void)setenv("LOGNAME", pwd->pw_name, 1); 585 (void)setenv("USER", pwd->pw_name, 1); 586 587 /* 588 * Add PAM environement 589 */ 590 if ((pamenv = pam_getenvlist(pamh)) != NULL) { 591 char **envitem; 592 593 for (envitem = pamenv; *envitem; envitem++) { 594 putenv(*envitem); 595 free(*envitem); 596 } 597 598 free(pamenv); 599 } 600 601 /* This drops root privs */ 602 if (setusercontext(lc, pwd, pwd->pw_uid, 603 (LOGIN_SETALL & ~LOGIN_SETLOGIN)) != 0) { 604 syslog(LOG_ERR, "setusercontext failed"); 605 exit(1); 606 } 607 608 if (!quietlog) { 609 char *fname; 610 611 fname = login_getcapstr(lc, "copyright", NULL, NULL); 612 if (fname != NULL && access(fname, F_OK) == 0) 613 motd(fname); 614 else 615 (void)printf("%s", copyrightstr); 616 617 fname = login_getcapstr(lc, "welcome", NULL, NULL); 618 if (fname == NULL || access(fname, F_OK) != 0) 619 fname = _PATH_MOTDFILE; 620 motd(fname); 621 622 (void)snprintf(tbuf, 623 sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 624 if (stat(tbuf, &st) == 0 && st.st_size != 0) 625 (void)printf("You have %smail.\n", 626 (st.st_mtime > st.st_atime) ? "new " : ""); 627 } 628 629 login_close(lc); 630 631 (void)signal(SIGALRM, SIG_DFL); 632 (void)signal(SIGQUIT, SIG_DFL); 633 (void)signal(SIGINT, SIG_DFL); 634 (void)signal(SIGTSTP, SIG_IGN); 635 636 tbuf[0] = '-'; 637 (void)strlcpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ? 638 p + 1 : pwd->pw_shell, sizeof(tbuf) - 1); 639 640 execlp(pwd->pw_shell, tbuf, 0); 641 err(1, "%s", pwd->pw_shell); 642 } 643 644 #define NBUFSIZ (MAXLOGNAME + 1) 645 646 647 void 648 getloginname(void) 649 { 650 int ch; 651 char *p; 652 static char nbuf[NBUFSIZ]; 653 654 for (;;) { 655 (void)printf("login: "); 656 for (p = nbuf; (ch = getchar()) != '\n'; ) { 657 if (ch == EOF) { 658 badlogin(username); 659 exit(0); 660 } 661 if (p < nbuf + (NBUFSIZ - 1)) 662 *p++ = ch; 663 } 664 if (p > nbuf) { 665 if (nbuf[0] == '-') 666 (void)fprintf(stderr, 667 "login names may not start with '-'.\n"); 668 else { 669 *p = '\0'; 670 username = nbuf; 671 break; 672 } 673 } 674 } 675 } 676 677 int 678 rootterm(char *ttyn) 679 { 680 struct ttyent *t; 681 682 return ((t = getttynam(ttyn)) && t->ty_status & TTY_SECURE); 683 } 684 685 jmp_buf motdinterrupt; 686 687 void 688 motd(char *fname) 689 { 690 int fd, nchars; 691 sig_t oldint; 692 char tbuf[8192]; 693 694 if ((fd = open(fname ? fname : _PATH_MOTDFILE, O_RDONLY, 0)) < 0) 695 return; 696 oldint = signal(SIGINT, sigint); 697 if (setjmp(motdinterrupt) == 0) 698 while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) 699 (void)write(fileno(stdout), tbuf, nchars); 700 (void)signal(SIGINT, oldint); 701 (void)close(fd); 702 } 703 704 /* ARGSUSED */ 705 void 706 sigint(int signo) 707 { 708 709 longjmp(motdinterrupt, 1); 710 } 711 712 /* ARGSUSED */ 713 void 714 timedout(int signo) 715 { 716 717 (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout); 718 exit(0); 719 } 720 721 static void 722 update_db(int quietlog) 723 { 724 if (nested != NULL) { 725 if (hostname != NULL) 726 syslog(LOG_NOTICE, "%s to %s on tty %s from %s", 727 nested, pwd->pw_name, tty, hostname); 728 else 729 syslog(LOG_NOTICE, "%s to %s on tty %s", nested, 730 pwd->pw_name, tty); 731 732 return; 733 } 734 if (hostname != NULL && have_ss == 0) { 735 socklen_t len = sizeof(ss); 736 (void)getpeername(STDIN_FILENO, (struct sockaddr *)&ss, &len); 737 } 738 (void)gettimeofday(&now, NULL); 739 } 740 741 void 742 badlogin(char *name) 743 { 744 745 if (failures == 0) 746 return; 747 if (hostname) { 748 syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s", 749 failures, failures > 1 ? "S" : "", hostname); 750 syslog(LOG_AUTHPRIV|LOG_NOTICE, 751 "%d LOGIN FAILURE%s FROM %s, %s", 752 failures, failures > 1 ? "S" : "", hostname, name); 753 } else { 754 syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s", 755 failures, failures > 1 ? "S" : "", tty); 756 syslog(LOG_AUTHPRIV|LOG_NOTICE, 757 "%d LOGIN FAILURE%s ON %s, %s", 758 failures, failures > 1 ? "S" : "", tty, name); 759 } 760 } 761 762 const char * 763 stypeof(const char *ttyid) 764 { 765 struct ttyent *t; 766 767 return (ttyid && (t = getttynam(ttyid)) ? t->ty_type : NULL); 768 } 769 770 void 771 sleepexit(int eval) 772 { 773 774 (void)sleep(5); 775 exit(eval); 776 } 777 778 void 779 decode_ss(const char *arg) 780 { 781 struct sockaddr_storage *ssp; 782 size_t len = strlen(arg); 783 784 if (len > sizeof(*ssp) * 4 + 1 || len < sizeof(*ssp)) 785 errx(1, "Bad argument"); 786 787 if ((ssp = malloc(len)) == NULL) 788 err(1, NULL); 789 790 if (strunvis((char *)ssp, arg) != sizeof(*ssp)) 791 errx(1, "Decoding error"); 792 793 (void)memcpy(&ss, ssp, sizeof(ss)); 794 have_ss = 1; 795 } 796 797 void 798 usage(void) 799 { 800 (void)fprintf(stderr, 801 "Usage: %s [-Ffps] [-a address] [-h hostname] [username]\n", 802 getprogname()); 803 exit(1); 804 } 805
Indexes created Tue Sep 30 11:09:46 GMT 2025