1 /* 2 * Copyright (c) 2000 Markus Friedl. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #include "includes.h" 26 RCSID("$OpenBSD: auth2.c,v 1.69 2001/07/23 18:14:58 stevesk Exp $"); 27 28 #include <openssl/evp.h> 29 30 #include "ssh2.h" 31 #include "xmalloc.h" 32 #include "rsa.h" 33 #include "sshpty.h" 34 #include "packet.h" 35 #include "buffer.h" 36 #include "log.h" 37 #include "servconf.h" 38 #include "compat.h" 39 #include "channels.h" 40 #include "bufaux.h" 41 #include "auth.h" 42 #include "session.h" 43 #include "dispatch.h" 44 #include "key.h" 45 #include "cipher.h" 46 #include "kex.h" 47 #include "pathnames.h" 48 #include "uidswap.h" 49 #include "auth-options.h" 50 #include "misc.h" 51 #include "hostfile.h" 52 #include "canohost.h" 53 #include "tildexpand.h" 54 #include "match.h" 55 56 /* import */ 57 extern ServerOptions options; 58 extern u_char *session_id2; 59 extern int session_id2_len; 60 61 static Authctxt *x_authctxt = NULL; 62 static int one = 1; 63 64 typedef struct Authmethod Authmethod; 65 struct Authmethod { 66 char *name; 67 int (*userauth)(Authctxt *authctxt); 68 int *enabled; 69 }; 70 71 /* protocol */ 72 73 static void input_service_request(int, int, void *); 74 static void input_userauth_request(int, int, void *); 75 static void protocol_error(int, int, void *); 76 77 /* helper */ 78 static Authmethod *authmethod_lookup(const char *); 79 static char *authmethods_get(void); 80 static int user_key_allowed(struct passwd *, Key *); 81 static int hostbased_key_allowed(struct passwd *, const char *, char *, Key *); 82 83 /* auth */ 84 static void userauth_banner(void); 85 static int userauth_none(Authctxt *); 86 static int userauth_passwd(Authctxt *); 87 static int userauth_pubkey(Authctxt *); 88 static int userauth_hostbased(Authctxt *); 89 static int userauth_kbdint(Authctxt *); 90 91 Authmethod authmethods[] = { 92 {"none", 93 userauth_none, 94 &one}, 95 {"publickey", 96 userauth_pubkey, 97 &options.pubkey_authentication}, 98 {"password", 99 userauth_passwd, 100 &options.password_authentication}, 101 {"keyboard-interactive", 102 userauth_kbdint, 103 &options.kbd_interactive_authentication}, 104 {"hostbased", 105 userauth_hostbased, 106 &options.hostbased_authentication}, 107 {NULL, NULL, NULL} 108 }; 109 110 /* 111 * loop until authctxt->success == TRUE 112 */ 113 114 void 115 do_authentication2() 116 { 117 Authctxt *authctxt = authctxt_new(); 118 119 x_authctxt = authctxt; /*XXX*/ 120 121 /* challenge-reponse is implemented via keyboard interactive */ 122 if (options.challenge_response_authentication) 123 options.kbd_interactive_authentication = 1; 124 125 dispatch_init(&protocol_error); 126 dispatch_set(SSH2_MSG_SERVICE_REQUEST, &input_service_request); 127 dispatch_run(DISPATCH_BLOCK, &authctxt->success, authctxt); 128 do_authenticated(authctxt); 129 } 130 131 static void 132 protocol_error(int type, int plen, void *ctxt) 133 { 134 log("auth: protocol error: type %d plen %d", type, plen); 135 packet_start(SSH2_MSG_UNIMPLEMENTED); 136 packet_put_int(0); 137 packet_send(); 138 packet_write_wait(); 139 } 140 141 static void 142 input_service_request(int type, int plen, void *ctxt) 143 { 144 Authctxt *authctxt = ctxt; 145 u_int len; 146 int accept = 0; 147 char *service = packet_get_string(&len); 148 packet_done(); 149 150 if (authctxt == NULL) 151 fatal("input_service_request: no authctxt"); 152 153 if (strcmp(service, "ssh-userauth") == 0) { 154 if (!authctxt->success) { 155 accept = 1; 156 /* now we can handle user-auth requests */ 157 dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &input_userauth_request); 158 } 159 } 160 /* XXX all other service requests are denied */ 161 162 if (accept) { 163 packet_start(SSH2_MSG_SERVICE_ACCEPT); 164 packet_put_cstring(service); 165 packet_send(); 166 packet_write_wait(); 167 } else { 168 debug("bad service request %s", service); 169 packet_disconnect("bad service request %s", service); 170 } 171 xfree(service); 172 } 173 174 static void 175 input_userauth_request(int type, int plen, void *ctxt) 176 { 177 Authctxt *authctxt = ctxt; 178 Authmethod *m = NULL; 179 char *user, *service, *method, *style = NULL; 180 int authenticated = 0; 181 182 if (authctxt == NULL) 183 fatal("input_userauth_request: no authctxt"); 184 185 user = packet_get_string(NULL); 186 service = packet_get_string(NULL); 187 method = packet_get_string(NULL); 188 debug("userauth-request for user %s service %s method %s", user, service, method); 189 debug("attempt %d failures %d", authctxt->attempt, authctxt->failures); 190 191 if ((style = strchr(user, ':')) != NULL) 192 *style++ = 0; 193 194 if (authctxt->attempt++ == 0) { 195 /* setup auth context */ 196 struct passwd *pw = NULL; 197 pw = getpwnam(user); 198 if (pw && allowed_user(pw) && strcmp(service, "ssh-connection")==0) { 199 authctxt->pw = pwcopy(pw); 200 authctxt->valid = 1; 201 debug2("input_userauth_request: setting up authctxt for %s", user); 202 } else { 203 log("input_userauth_request: illegal user %s", user); 204 } 205 setproctitle("%s", pw ? user : "unknown"); 206 authctxt->user = xstrdup(user); 207 authctxt->service = xstrdup(service); 208 authctxt->style = style ? xstrdup(style) : NULL; 209 } else if (strcmp(user, authctxt->user) != 0 || 210 strcmp(service, authctxt->service) != 0) { 211 packet_disconnect("Change of username or service not allowed: " 212 "(%s,%s) -> (%s,%s)", 213 authctxt->user, authctxt->service, user, service); 214 } 215 /* reset state */ 216 dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE, &protocol_error); 217 authctxt->postponed = 0; 218 #ifdef BSD_AUTH 219 if (authctxt->as) { 220 auth_close(authctxt->as); 221 authctxt->as = NULL; 222 } 223 #endif 224 225 /* try to authenticate user */ 226 m = authmethod_lookup(method); 227 if (m != NULL) { 228 debug2("input_userauth_request: try method %s", method); 229 authenticated = m->userauth(authctxt); 230 } 231 userauth_finish(authctxt, authenticated, method); 232 233 xfree(service); 234 xfree(user); 235 xfree(method); 236 } 237 238 void 239 userauth_finish(Authctxt *authctxt, int authenticated, char *method) 240 { 241 char *methods; 242 243 if (!authctxt->valid && authenticated) 244 fatal("INTERNAL ERROR: authenticated invalid user %s", 245 authctxt->user); 246 247 /* Special handling for root */ 248 if (authenticated && authctxt->pw->pw_uid == 0 && 249 !auth_root_allowed(method)) 250 authenticated = 0; 251 252 /* Log before sending the reply */ 253 auth_log(authctxt, authenticated, method, " ssh2"); 254 255 if (authctxt->postponed) 256 return; 257 258 /* XXX todo: check if multiple auth methods are needed */ 259 if (authenticated == 1) { 260 /* turn off userauth */ 261 dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &protocol_error); 262 packet_start(SSH2_MSG_USERAUTH_SUCCESS); 263 packet_send(); 264 packet_write_wait(); 265 /* now we can break out */ 266 authctxt->success = 1; 267 } else { 268 if (authctxt->failures++ > AUTH_FAIL_MAX) 269 packet_disconnect(AUTH_FAIL_MSG, authctxt->user); 270 methods = authmethods_get(); 271 packet_start(SSH2_MSG_USERAUTH_FAILURE); 272 packet_put_cstring(methods); 273 packet_put_char(0); /* XXX partial success, unused */ 274 packet_send(); 275 packet_write_wait(); 276 xfree(methods); 277 } 278 } 279 280 static void 281 userauth_banner(void) 282 { 283 struct stat st; 284 char *banner = NULL; 285 off_t len, n; 286 int fd; 287 288 if (options.banner == NULL || (datafellows & SSH_BUG_BANNER)) 289 return; 290 if ((fd = open(options.banner, O_RDONLY)) < 0) 291 return; 292 if (fstat(fd, &st) < 0) 293 goto done; 294 len = st.st_size; 295 banner = xmalloc(len + 1); 296 if ((n = read(fd, banner, len)) < 0) 297 goto done; 298 banner[n] = '\0'; 299 packet_start(SSH2_MSG_USERAUTH_BANNER); 300 packet_put_cstring(banner); 301 packet_put_cstring(""); /* language, unused */ 302 packet_send(); 303 debug("userauth_banner: sent"); 304 done: 305 if (banner) 306 xfree(banner); 307 close(fd); 308 return; 309 } 310 311 static int 312 userauth_none(Authctxt *authctxt) 313 { 314 /* disable method "none", only allowed one time */ 315 Authmethod *m = authmethod_lookup("none"); 316 if (m != NULL) 317 m->enabled = NULL; 318 packet_done(); 319 userauth_banner(); 320 return authctxt->valid ? auth_password(authctxt, "") : 0; 321 } 322 323 static int 324 userauth_passwd(Authctxt *authctxt) 325 { 326 char *password; 327 int authenticated = 0; 328 int change; 329 u_int len; 330 change = packet_get_char(); 331 if (change) 332 log("password change not supported"); 333 password = packet_get_string(&len); 334 packet_done(); 335 if (authctxt->valid && 336 auth_password(authctxt, password) == 1) 337 authenticated = 1; 338 memset(password, 0, len); 339 xfree(password); 340 return authenticated; 341 } 342 343 static int 344 userauth_kbdint(Authctxt *authctxt) 345 { 346 int authenticated = 0; 347 char *lang, *devs; 348 349 lang = packet_get_string(NULL); 350 devs = packet_get_string(NULL); 351 packet_done(); 352 353 debug("keyboard-interactive devs %s", devs); 354 355 if (options.challenge_response_authentication) 356 authenticated = auth2_challenge(authctxt, devs); 357 358 xfree(devs); 359 xfree(lang); 360 return authenticated; 361 } 362 363 static int 364 userauth_pubkey(Authctxt *authctxt) 365 { 366 Buffer b; 367 Key *key; 368 char *pkalg, *pkblob, *sig; 369 u_int alen, blen, slen; 370 int have_sig, pktype; 371 int authenticated = 0; 372 373 if (!authctxt->valid) { 374 debug2("userauth_pubkey: disabled because of invalid user"); 375 return 0; 376 } 377 have_sig = packet_get_char(); 378 if (datafellows & SSH_BUG_PKAUTH) { 379 debug2("userauth_pubkey: SSH_BUG_PKAUTH"); 380 /* no explicit pkalg given */ 381 pkblob = packet_get_string(&blen); 382 buffer_init(&b); 383 buffer_append(&b, pkblob, blen); 384 /* so we have to extract the pkalg from the pkblob */ 385 pkalg = buffer_get_string(&b, &alen); 386 buffer_free(&b); 387 } else { 388 pkalg = packet_get_string(&alen); 389 pkblob = packet_get_string(&blen); 390 } 391 pktype = key_type_from_name(pkalg); 392 if (pktype == KEY_UNSPEC) { 393 /* this is perfectly legal */ 394 log("userauth_pubkey: unsupported public key algorithm: %s", pkalg); 395 xfree(pkalg); 396 xfree(pkblob); 397 return 0; 398 } 399 key = key_from_blob(pkblob, blen); 400 if (key != NULL) { 401 if (have_sig) { 402 sig = packet_get_string(&slen); 403 packet_done(); 404 buffer_init(&b); 405 if (datafellows & SSH_OLD_SESSIONID) { 406 buffer_append(&b, session_id2, session_id2_len); 407 } else { 408 buffer_put_string(&b, session_id2, session_id2_len); 409 } 410 /* reconstruct packet */ 411 buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST); 412 buffer_put_cstring(&b, authctxt->user); 413 buffer_put_cstring(&b, 414 datafellows & SSH_BUG_PKSERVICE ? 415 "ssh-userauth" : 416 authctxt->service); 417 if (datafellows & SSH_BUG_PKAUTH) { 418 buffer_put_char(&b, have_sig); 419 } else { 420 buffer_put_cstring(&b, "publickey"); 421 buffer_put_char(&b, have_sig); 422 buffer_put_cstring(&b, pkalg); 423 } 424 buffer_put_string(&b, pkblob, blen); 425 #ifdef DEBUG_PK 426 buffer_dump(&b); 427 #endif 428 /* test for correct signature */ 429 if (user_key_allowed(authctxt->pw, key) && 430 key_verify(key, sig, slen, buffer_ptr(&b), buffer_len(&b)) == 1) 431 authenticated = 1; 432 buffer_clear(&b); 433 xfree(sig); 434 } else { 435 debug("test whether pkalg/pkblob are acceptable"); 436 packet_done(); 437 438 /* XXX fake reply and always send PK_OK ? */ 439 /* 440 * XXX this allows testing whether a user is allowed 441 * to login: if you happen to have a valid pubkey this 442 * message is sent. the message is NEVER sent at all 443 * if a user is not allowed to login. is this an 444 * issue? -markus 445 */ 446 if (user_key_allowed(authctxt->pw, key)) { 447 packet_start(SSH2_MSG_USERAUTH_PK_OK); 448 packet_put_string(pkalg, alen); 449 packet_put_string(pkblob, blen); 450 packet_send(); 451 packet_write_wait(); 452 authctxt->postponed = 1; 453 } 454 } 455 if (authenticated != 1) 456 auth_clear_options(); 457 key_free(key); 458 } 459 debug2("userauth_pubkey: authenticated %d pkalg %s", authenticated, pkalg); 460 xfree(pkalg); 461 xfree(pkblob); 462 return authenticated; 463 } 464 465 static int 466 userauth_hostbased(Authctxt *authctxt) 467 { 468 Buffer b; 469 Key *key; 470 char *pkalg, *pkblob, *sig, *cuser, *chost, *service; 471 u_int alen, blen, slen; 472 int pktype; 473 int authenticated = 0; 474 475 if (!authctxt->valid) { 476 debug2("userauth_hostbased: disabled because of invalid user"); 477 return 0; 478 } 479 pkalg = packet_get_string(&alen); 480 pkblob = packet_get_string(&blen); 481 chost = packet_get_string(NULL); 482 cuser = packet_get_string(NULL); 483 sig = packet_get_string(&slen); 484 485 debug("userauth_hostbased: cuser %s chost %s pkalg %s slen %d", 486 cuser, chost, pkalg, slen); 487 #ifdef DEBUG_PK 488 debug("signature:"); 489 buffer_init(&b); 490 buffer_append(&b, sig, slen); 491 buffer_dump(&b); 492 buffer_free(&b); 493 #endif 494 pktype = key_type_from_name(pkalg); 495 if (pktype == KEY_UNSPEC) { 496 /* this is perfectly legal */ 497 log("userauth_hostbased: unsupported " 498 "public key algorithm: %s", pkalg); 499 goto done; 500 } 501 key = key_from_blob(pkblob, blen); 502 if (key == NULL) { 503 debug("userauth_hostbased: cannot decode key: %s", pkalg); 504 goto done; 505 } 506 service = datafellows & SSH_BUG_HBSERVICE ? "ssh-userauth" : 507 authctxt->service; 508 buffer_init(&b); 509 buffer_put_string(&b, session_id2, session_id2_len); 510 /* reconstruct packet */ 511 buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST); 512 buffer_put_cstring(&b, authctxt->user); 513 buffer_put_cstring(&b, service); 514 buffer_put_cstring(&b, "hostbased"); 515 buffer_put_string(&b, pkalg, alen); 516 buffer_put_string(&b, pkblob, blen); 517 buffer_put_cstring(&b, chost); 518 buffer_put_cstring(&b, cuser); 519 #ifdef DEBUG_PK 520 buffer_dump(&b); 521 #endif 522 /* test for allowed key and correct signature */ 523 if (hostbased_key_allowed(authctxt->pw, cuser, chost, key) && 524 key_verify(key, sig, slen, buffer_ptr(&b), buffer_len(&b)) == 1) 525 authenticated = 1; 526 527 buffer_clear(&b); 528 key_free(key); 529 530 done: 531 debug2("userauth_hostbased: authenticated %d", authenticated); 532 xfree(pkalg); 533 xfree(pkblob); 534 xfree(cuser); 535 xfree(chost); 536 xfree(sig); 537 return authenticated; 538 } 539 540 /* get current user */ 541 542 struct passwd* 543 auth_get_user(void) 544 { 545 return (x_authctxt != NULL && x_authctxt->valid) ? x_authctxt->pw : NULL; 546 } 547 548 #define DELIM "," 549 550 static char * 551 authmethods_get(void) 552 { 553 Authmethod *method = NULL; 554 u_int size = 0; 555 char *list; 556 557 for (method = authmethods; method->name != NULL; method++) { 558 if (strcmp(method->name, "none") == 0) 559 continue; 560 if (method->enabled != NULL && *(method->enabled) != 0) { 561 if (size != 0) 562 size += strlen(DELIM); 563 size += strlen(method->name); 564 } 565 } 566 size++; /* trailing '\0' */ 567 list = xmalloc(size); 568 list[0] = '\0'; 569 570 for (method = authmethods; method->name != NULL; method++) { 571 if (strcmp(method->name, "none") == 0) 572 continue; 573 if (method->enabled != NULL && *(method->enabled) != 0) { 574 if (list[0] != '\0') 575 strlcat(list, DELIM, size); 576 strlcat(list, method->name, size); 577 } 578 } 579 return list; 580 } 581 582 static Authmethod * 583 authmethod_lookup(const char *name) 584 { 585 Authmethod *method = NULL; 586 if (name != NULL) 587 for (method = authmethods; method->name != NULL; method++) 588 if (method->enabled != NULL && 589 *(method->enabled) != 0 && 590 strcmp(name, method->name) == 0) 591 return method; 592 debug2("Unrecognized authentication method name: %s", name ? name : "NULL"); 593 return NULL; 594 } 595 596 /* return 1 if user allows given key */ 597 static int 598 user_key_allowed2(struct passwd *pw, Key *key, char *file) 599 { 600 char line[8192]; 601 int found_key = 0; 602 FILE *f; 603 u_long linenum = 0; 604 struct stat st; 605 Key *found; 606 607 if (pw == NULL) 608 return 0; 609 610 /* Temporarily use the user's uid. */ 611 temporarily_use_uid(pw); 612 613 debug("trying public key file %s", file); 614 615 /* Fail quietly if file does not exist */ 616 if (stat(file, &st) < 0) { 617 /* Restore the privileged uid. */ 618 restore_uid(); 619 return 0; 620 } 621 /* Open the file containing the authorized keys. */ 622 f = fopen(file, "r"); 623 if (!f) { 624 /* Restore the privileged uid. */ 625 restore_uid(); 626 return 0; 627 } 628 if (options.strict_modes && 629 secure_filename(f, file, pw, line, sizeof(line)) != 0) { 630 fclose(f); 631 log("Authentication refused: %s", line); 632 restore_uid(); 633 return 0; 634 } 635 636 found_key = 0; 637 found = key_new(key->type); 638 639 while (fgets(line, sizeof(line), f)) { 640 char *cp, *options = NULL; 641 linenum++; 642 /* Skip leading whitespace, empty and comment lines. */ 643 for (cp = line; *cp == ' ' || *cp == '\t'; cp++) 644 ; 645 if (!*cp || *cp == '\n' || *cp == '#') 646 continue; 647 648 if (key_read(found, &cp) == -1) { 649 /* no key? check if there are options for this key */ 650 int quoted = 0; 651 debug2("user_key_allowed: check options: '%s'", cp); 652 options = cp; 653 for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { 654 if (*cp == '\\' && cp[1] == '"') 655 cp++; /* Skip both */ 656 else if (*cp == '"') 657 quoted = !quoted; 658 } 659 /* Skip remaining whitespace. */ 660 for (; *cp == ' ' || *cp == '\t'; cp++) 661 ; 662 if (key_read(found, &cp) == -1) { 663 debug2("user_key_allowed: advance: '%s'", cp); 664 /* still no key? advance to next line*/ 665 continue; 666 } 667 } 668 if (key_equal(found, key) && 669 auth_parse_options(pw, options, file, linenum) == 1) { 670 found_key = 1; 671 debug("matching key found: file %s, line %lu", 672 file, linenum); 673 break; 674 } 675 } 676 restore_uid(); 677 fclose(f); 678 key_free(found); 679 if (!found_key) 680 debug2("key not found"); 681 return found_key; 682 } 683 684 /* check whether given key is in .ssh/authorized_keys* */ 685 static int 686 user_key_allowed(struct passwd *pw, Key *key) 687 { 688 int success; 689 char *file; 690 691 file = authorized_keys_file(pw); 692 success = user_key_allowed2(pw, key, file); 693 xfree(file); 694 if (success) 695 return success; 696 697 /* try suffix "2" for backward compat, too */ 698 file = authorized_keys_file2(pw); 699 success = user_key_allowed2(pw, key, file); 700 xfree(file); 701 return success; 702 } 703 704 /* return 1 if given hostkey is allowed */ 705 static int 706 hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost, 707 Key *key) 708 { 709 const char *resolvedname, *ipaddr, *lookup; 710 int host_status, len; 711 712 resolvedname = get_canonical_hostname(options.reverse_mapping_check); 713 ipaddr = get_remote_ipaddr(); 714 715 debug2("userauth_hostbased: chost %s resolvedname %s ipaddr %s", 716 chost, resolvedname, ipaddr); 717 718 if (options.hostbased_uses_name_from_packet_only) { 719 if (auth_rhosts2(pw, cuser, chost, chost) == 0) 720 return 0; 721 lookup = chost; 722 } else { 723 if (((len = strlen(chost)) > 0) && chost[len - 1] == '.') { 724 debug2("stripping trailing dot from chost %s", chost); 725 chost[len - 1] = '\0'; 726 } 727 if (strcasecmp(resolvedname, chost) != 0) 728 log("userauth_hostbased mismatch: " 729 "client sends %s, but we resolve %s to %s", 730 chost, ipaddr, resolvedname); 731 if (auth_rhosts2(pw, cuser, resolvedname, ipaddr) == 0) 732 return 0; 733 lookup = resolvedname; 734 } 735 debug2("userauth_hostbased: access allowed by auth_rhosts2"); 736 737 host_status = check_key_in_hostfiles(pw, key, lookup, 738 _PATH_SSH_SYSTEM_HOSTFILE, 739 options.ignore_user_known_hosts ? NULL : _PATH_SSH_USER_HOSTFILE); 740 741 /* backward compat if no key has been found. */ 742 if (host_status == HOST_NEW) 743 host_status = check_key_in_hostfiles(pw, key, lookup, 744 _PATH_SSH_SYSTEM_HOSTFILE2, 745 options.ignore_user_known_hosts ? NULL : 746 _PATH_SSH_USER_HOSTFILE2); 747 748 return (host_status == HOST_OK); 749 } 750 751