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 1.84 2002/02/04 11:58:10 markus 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 "match.h" 54 55 /* import */ 56 extern ServerOptions options; 57 extern u_char *session_id2; 58 extern int session_id2_len; 59 60 static Authctxt *x_authctxt = NULL; 61 static int one = 1; 62 63 typedef struct Authmethod Authmethod; 64 struct Authmethod { 65 char *name; 66 int (*userauth)(Authctxt *authctxt); 67 int *enabled; 68 }; 69 70 /* protocol */ 71 72 static void input_service_request(int, u_int32_t, void *); 73 static void input_userauth_request(int, u_int32_t, void *); 74 75 /* helper */ 76 static Authmethod *authmethod_lookup(const char *); 77 static char *authmethods_get(void); 78 static int user_key_allowed(struct passwd *, Key *); 79 static int hostbased_key_allowed(struct passwd *, const char *, char *, Key *); 80 81 /* auth */ 82 static void userauth_banner(void); 83 static int userauth_none(Authctxt *); 84 static int userauth_passwd(Authctxt *); 85 static int userauth_pubkey(Authctxt *); 86 static int userauth_hostbased(Authctxt *); 87 static int userauth_kbdint(Authctxt *); 88 89 Authmethod authmethods[] = { 90 {"none", 91 userauth_none, 92 &one}, 93 {"publickey", 94 userauth_pubkey, 95 &options.pubkey_authentication}, 96 {"password", 97 userauth_passwd, 98 &options.password_authentication}, 99 {"keyboard-interactive", 100 userauth_kbdint, 101 &options.kbd_interactive_authentication}, 102 {"hostbased", 103 userauth_hostbased, 104 &options.hostbased_authentication}, 105 {NULL, NULL, NULL} 106 }; 107 108 /* 109 * loop until authctxt->success == TRUE 110 */ 111 112 void 113 do_authentication2(void) 114 { 115 Authctxt *authctxt = authctxt_new(); 116 117 x_authctxt = authctxt; /*XXX*/ 118 119 /* challenge-response is implemented via keyboard interactive */ 120 if (options.challenge_response_authentication) 121 options.kbd_interactive_authentication = 1; 122 123 dispatch_init(&dispatch_protocol_error); 124 dispatch_set(SSH2_MSG_SERVICE_REQUEST, &input_service_request); 125 dispatch_run(DISPATCH_BLOCK, &authctxt->success, authctxt); 126 do_authenticated(authctxt); 127 } 128 129 static void 130 input_service_request(int type, u_int32_t seq, void *ctxt) 131 { 132 Authctxt *authctxt = ctxt; 133 u_int len; 134 int accept = 0; 135 char *service = packet_get_string(&len); 136 packet_check_eom(); 137 138 if (authctxt == NULL) 139 fatal("input_service_request: no authctxt"); 140 141 if (strcmp(service, "ssh-userauth") == 0) { 142 if (!authctxt->success) { 143 accept = 1; 144 /* now we can handle user-auth requests */ 145 dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &input_userauth_request); 146 } 147 } 148 /* XXX all other service requests are denied */ 149 150 if (accept) { 151 packet_start(SSH2_MSG_SERVICE_ACCEPT); 152 packet_put_cstring(service); 153 packet_send(); 154 packet_write_wait(); 155 } else { 156 debug("bad service request %s", service); 157 packet_disconnect("bad service request %s", service); 158 } 159 xfree(service); 160 } 161 162 static void 163 input_userauth_request(int type, u_int32_t seq, void *ctxt) 164 { 165 Authctxt *authctxt = ctxt; 166 Authmethod *m = NULL; 167 char *user, *service, *method, *style = NULL; 168 int authenticated = 0; 169 170 if (authctxt == NULL) 171 fatal("input_userauth_request: no authctxt"); 172 173 user = packet_get_string(NULL); 174 service = packet_get_string(NULL); 175 method = packet_get_string(NULL); 176 debug("userauth-request for user %s service %s method %s", user, service, method); 177 debug("attempt %d failures %d", authctxt->attempt, authctxt->failures); 178 179 if ((style = strchr(user, ':')) != NULL) 180 *style++ = 0; 181 182 if (authctxt->attempt++ == 0) { 183 /* setup auth context */ 184 struct passwd *pw = NULL; 185 pw = getpwnam(user); 186 if (pw && allowed_user(pw) && strcmp(service, "ssh-connection")==0) { 187 authctxt->pw = pwcopy(pw); 188 authctxt->valid = 1; 189 debug2("input_userauth_request: setting up authctxt for %s", user); 190 } else { 191 log("input_userauth_request: illegal user %s", user); 192 } 193 setproctitle("%s", pw ? user : "unknown"); 194 authctxt->user = xstrdup(user); 195 authctxt->service = xstrdup(service); 196 authctxt->style = style ? xstrdup(style) : NULL; 197 } else if (strcmp(user, authctxt->user) != 0 || 198 strcmp(service, authctxt->service) != 0) { 199 packet_disconnect("Change of username or service not allowed: " 200 "(%s,%s) -> (%s,%s)", 201 authctxt->user, authctxt->service, user, service); 202 } 203 /* reset state */ 204 auth2_challenge_stop(authctxt); 205 authctxt->postponed = 0; 206 207 /* try to authenticate user */ 208 m = authmethod_lookup(method); 209 if (m != NULL) { 210 debug2("input_userauth_request: try method %s", method); 211 authenticated = m->userauth(authctxt); 212 } 213 userauth_finish(authctxt, authenticated, method); 214 215 xfree(service); 216 xfree(user); 217 xfree(method); 218 } 219 220 void 221 userauth_finish(Authctxt *authctxt, int authenticated, char *method) 222 { 223 char *methods; 224 225 if (!authctxt->valid && authenticated) 226 fatal("INTERNAL ERROR: authenticated invalid user %s", 227 authctxt->user); 228 229 /* Special handling for root */ 230 if (authenticated && authctxt->pw->pw_uid == 0 && 231 !auth_root_allowed(method)) 232 authenticated = 0; 233 234 /* Log before sending the reply */ 235 auth_log(authctxt, authenticated, method, " ssh2"); 236 237 if (authctxt->postponed) 238 return; 239 240 /* XXX todo: check if multiple auth methods are needed */ 241 if (authenticated == 1) { 242 /* turn off userauth */ 243 dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &dispatch_protocol_ignore); 244 packet_start(SSH2_MSG_USERAUTH_SUCCESS); 245 packet_send(); 246 packet_write_wait(); 247 /* now we can break out */ 248 authctxt->success = 1; 249 } else { 250 if (authctxt->failures++ > AUTH_FAIL_MAX) 251 packet_disconnect(AUTH_FAIL_MSG, authctxt->user); 252 methods = authmethods_get(); 253 packet_start(SSH2_MSG_USERAUTH_FAILURE); 254 packet_put_cstring(methods); 255 packet_put_char(0); /* XXX partial success, unused */ 256 packet_send(); 257 packet_write_wait(); 258 xfree(methods); 259 } 260 } 261 262 static void 263 userauth_banner(void) 264 { 265 struct stat st; 266 char *banner = NULL; 267 off_t len, n; 268 int fd; 269 270 if (options.banner == NULL || (datafellows & SSH_BUG_BANNER)) 271 return; 272 if ((fd = open(options.banner, O_RDONLY)) < 0) 273 return; 274 if (fstat(fd, &st) < 0) 275 goto done; 276 len = st.st_size; 277 banner = xmalloc(len + 1); 278 if ((n = read(fd, banner, len)) < 0) 279 goto done; 280 banner[n] = '\0'; 281 packet_start(SSH2_MSG_USERAUTH_BANNER); 282 packet_put_cstring(banner); 283 packet_put_cstring(""); /* language, unused */ 284 packet_send(); 285 debug("userauth_banner: sent"); 286 done: 287 if (banner) 288 xfree(banner); 289 close(fd); 290 return; 291 } 292 293 static int 294 userauth_none(Authctxt *authctxt) 295 { 296 /* disable method "none", only allowed one time */ 297 Authmethod *m = authmethod_lookup("none"); 298 if (m != NULL) 299 m->enabled = NULL; 300 packet_check_eom(); 301 userauth_banner(); 302 return authctxt->valid ? auth_password(authctxt, "") : 0; 303 } 304 305 static int 306 userauth_passwd(Authctxt *authctxt) 307 { 308 char *password; 309 int authenticated = 0; 310 int change; 311 u_int len; 312 change = packet_get_char(); 313 if (change) 314 log("password change not supported"); 315 password = packet_get_string(&len); 316 packet_check_eom(); 317 if (authctxt->valid && 318 auth_password(authctxt, password) == 1) 319 authenticated = 1; 320 memset(password, 0, len); 321 xfree(password); 322 return authenticated; 323 } 324 325 static int 326 userauth_kbdint(Authctxt *authctxt) 327 { 328 int authenticated = 0; 329 char *lang, *devs; 330 331 lang = packet_get_string(NULL); 332 devs = packet_get_string(NULL); 333 packet_check_eom(); 334 335 debug("keyboard-interactive devs %s", devs); 336 337 if (options.challenge_response_authentication) 338 authenticated = auth2_challenge(authctxt, devs); 339 340 xfree(devs); 341 xfree(lang); 342 return authenticated; 343 } 344 345 static int 346 userauth_pubkey(Authctxt *authctxt) 347 { 348 Buffer b; 349 Key *key = NULL; 350 char *pkalg, *pkblob, *sig; 351 u_int alen, blen, slen; 352 int have_sig, pktype; 353 int authenticated = 0; 354 355 if (!authctxt->valid) { 356 debug2("userauth_pubkey: disabled because of invalid user"); 357 return 0; 358 } 359 have_sig = packet_get_char(); 360 if (datafellows & SSH_BUG_PKAUTH) { 361 debug2("userauth_pubkey: SSH_BUG_PKAUTH"); 362 /* no explicit pkalg given */ 363 pkblob = packet_get_string(&blen); 364 buffer_init(&b); 365 buffer_append(&b, pkblob, blen); 366 /* so we have to extract the pkalg from the pkblob */ 367 pkalg = buffer_get_string(&b, &alen); 368 buffer_free(&b); 369 } else { 370 pkalg = packet_get_string(&alen); 371 pkblob = packet_get_string(&blen); 372 } 373 pktype = key_type_from_name(pkalg); 374 if (pktype == KEY_UNSPEC) { 375 /* this is perfectly legal */ 376 log("userauth_pubkey: unsupported public key algorithm: %s", 377 pkalg); 378 goto done; 379 } 380 key = key_from_blob(pkblob, blen); 381 if (key == NULL) { 382 error("userauth_pubkey: cannot decode key: %s", pkalg); 383 goto done; 384 } 385 if (key->type != pktype) { 386 error("userauth_pubkey: type mismatch for decoded key " 387 "(received %d, expected %d)", key->type, pktype); 388 goto done; 389 } 390 if (have_sig) { 391 sig = packet_get_string(&slen); 392 packet_check_eom(); 393 buffer_init(&b); 394 if (datafellows & SSH_OLD_SESSIONID) { 395 buffer_append(&b, session_id2, session_id2_len); 396 } else { 397 buffer_put_string(&b, session_id2, session_id2_len); 398 } 399 /* reconstruct packet */ 400 buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST); 401 buffer_put_cstring(&b, authctxt->user); 402 buffer_put_cstring(&b, 403 datafellows & SSH_BUG_PKSERVICE ? 404 "ssh-userauth" : 405 authctxt->service); 406 if (datafellows & SSH_BUG_PKAUTH) { 407 buffer_put_char(&b, have_sig); 408 } else { 409 buffer_put_cstring(&b, "publickey"); 410 buffer_put_char(&b, have_sig); 411 buffer_put_cstring(&b, pkalg); 412 } 413 buffer_put_string(&b, pkblob, blen); 414 #ifdef DEBUG_PK 415 buffer_dump(&b); 416 #endif 417 /* test for correct signature */ 418 if (user_key_allowed(authctxt->pw, key) && 419 key_verify(key, sig, slen, buffer_ptr(&b), buffer_len(&b)) == 1) 420 authenticated = 1; 421 buffer_clear(&b); 422 xfree(sig); 423 } else { 424 debug("test whether pkalg/pkblob are acceptable"); 425 packet_check_eom(); 426 427 /* XXX fake reply and always send PK_OK ? */ 428 /* 429 * XXX this allows testing whether a user is allowed 430 * to login: if you happen to have a valid pubkey this 431 * message is sent. the message is NEVER sent at all 432 * if a user is not allowed to login. is this an 433 * issue? -markus 434 */ 435 if (user_key_allowed(authctxt->pw, key)) { 436 packet_start(SSH2_MSG_USERAUTH_PK_OK); 437 packet_put_string(pkalg, alen); 438 packet_put_string(pkblob, blen); 439 packet_send(); 440 packet_write_wait(); 441 authctxt->postponed = 1; 442 } 443 } 444 if (authenticated != 1) 445 auth_clear_options(); 446 done: 447 debug2("userauth_pubkey: authenticated %d pkalg %s", authenticated, pkalg); 448 if (key != NULL) 449 key_free(key); 450 xfree(pkalg); 451 xfree(pkblob); 452 return authenticated; 453 } 454 455 static int 456 userauth_hostbased(Authctxt *authctxt) 457 { 458 Buffer b; 459 Key *key = NULL; 460 char *pkalg, *pkblob, *sig, *cuser, *chost, *service; 461 u_int alen, blen, slen; 462 int pktype; 463 int authenticated = 0; 464 465 if (!authctxt->valid) { 466 debug2("userauth_hostbased: disabled because of invalid user"); 467 return 0; 468 } 469 pkalg = packet_get_string(&alen); 470 pkblob = packet_get_string(&blen); 471 chost = packet_get_string(NULL); 472 cuser = packet_get_string(NULL); 473 sig = packet_get_string(&slen); 474 475 debug("userauth_hostbased: cuser %s chost %s pkalg %s slen %d", 476 cuser, chost, pkalg, slen); 477 #ifdef DEBUG_PK 478 debug("signature:"); 479 buffer_init(&b); 480 buffer_append(&b, sig, slen); 481 buffer_dump(&b); 482 buffer_free(&b); 483 #endif 484 pktype = key_type_from_name(pkalg); 485 if (pktype == KEY_UNSPEC) { 486 /* this is perfectly legal */ 487 log("userauth_hostbased: unsupported " 488 "public key algorithm: %s", pkalg); 489 goto done; 490 } 491 key = key_from_blob(pkblob, blen); 492 if (key == NULL) { 493 error("userauth_hostbased: cannot decode key: %s", pkalg); 494 goto done; 495 } 496 if (key->type != pktype) { 497 error("userauth_hostbased: type mismatch for decoded key " 498 "(received %d, expected %d)", key->type, pktype); 499 goto done; 500 } 501 service = datafellows & SSH_BUG_HBSERVICE ? "ssh-userauth" : 502 authctxt->service; 503 buffer_init(&b); 504 buffer_put_string(&b, session_id2, session_id2_len); 505 /* reconstruct packet */ 506 buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST); 507 buffer_put_cstring(&b, authctxt->user); 508 buffer_put_cstring(&b, service); 509 buffer_put_cstring(&b, "hostbased"); 510 buffer_put_string(&b, pkalg, alen); 511 buffer_put_string(&b, pkblob, blen); 512 buffer_put_cstring(&b, chost); 513 buffer_put_cstring(&b, cuser); 514 #ifdef DEBUG_PK 515 buffer_dump(&b); 516 #endif 517 /* test for allowed key and correct signature */ 518 if (hostbased_key_allowed(authctxt->pw, cuser, chost, key) && 519 key_verify(key, sig, slen, buffer_ptr(&b), buffer_len(&b)) == 1) 520 authenticated = 1; 521 522 buffer_clear(&b); 523 done: 524 debug2("userauth_hostbased: authenticated %d", authenticated); 525 if (key != NULL) 526 key_free(key); 527 xfree(pkalg); 528 xfree(pkblob); 529 xfree(cuser); 530 xfree(chost); 531 xfree(sig); 532 return authenticated; 533 } 534 535 /* get current user */ 536 537 struct passwd* 538 auth_get_user(void) 539 { 540 return (x_authctxt != NULL && x_authctxt->valid) ? x_authctxt->pw : NULL; 541 } 542 543 #define DELIM "," 544 545 static char * 546 authmethods_get(void) 547 { 548 Authmethod *method = NULL; 549 Buffer b; 550 char *list; 551 552 buffer_init(&b); 553 for (method = authmethods; method->name != NULL; method++) { 554 if (strcmp(method->name, "none") == 0) 555 continue; 556 if (method->enabled != NULL && *(method->enabled) != 0) { 557 if (buffer_len(&b) > 0) 558 buffer_append(&b, ",", 1); 559 buffer_append(&b, method->name, strlen(method->name)); 560 } 561 } 562 buffer_append(&b, "\0", 1); 563 list = xstrdup(buffer_ptr(&b)); 564 buffer_free(&b); 565 return list; 566 } 567 568 static Authmethod * 569 authmethod_lookup(const char *name) 570 { 571 Authmethod *method = NULL; 572 if (name != NULL) 573 for (method = authmethods; method->name != NULL; method++) 574 if (method->enabled != NULL && 575 *(method->enabled) != 0 && 576 strcmp(name, method->name) == 0) 577 return method; 578 debug2("Unrecognized authentication method name: %s", name ? name : "NULL"); 579 return NULL; 580 } 581 582 /* return 1 if user allows given key */ 583 static int 584 user_key_allowed2(struct passwd *pw, Key *key, char *file) 585 { 586 char line[8192]; 587 int found_key = 0; 588 FILE *f; 589 u_long linenum = 0; 590 struct stat st; 591 Key *found; 592 char *fp; 593 594 if (pw == NULL) 595 return 0; 596 597 /* Temporarily use the user's uid. */ 598 temporarily_use_uid(pw); 599 600 debug("trying public key file %s", file); 601 602 /* Fail quietly if file does not exist */ 603 if (stat(file, &st) < 0) { 604 /* Restore the privileged uid. */ 605 restore_uid(); 606 return 0; 607 } 608 /* Open the file containing the authorized keys. */ 609 f = fopen(file, "r"); 610 if (!f) { 611 /* Restore the privileged uid. */ 612 restore_uid(); 613 return 0; 614 } 615 if (options.strict_modes && 616 secure_filename(f, file, pw, line, sizeof(line)) != 0) { 617 fclose(f); 618 log("Authentication refused: %s", line); 619 restore_uid(); 620 return 0; 621 } 622 623 found_key = 0; 624 found = key_new(key->type); 625 626 while (fgets(line, sizeof(line), f)) { 627 char *cp, *options = NULL; 628 linenum++; 629 /* Skip leading whitespace, empty and comment lines. */ 630 for (cp = line; *cp == ' ' || *cp == '\t'; cp++) 631 ; 632 if (!*cp || *cp == '\n' || *cp == '#') 633 continue; 634 635 if (key_read(found, &cp) != 1) { 636 /* no key? check if there are options for this key */ 637 int quoted = 0; 638 debug2("user_key_allowed: check options: '%s'", cp); 639 options = cp; 640 for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { 641 if (*cp == '\\' && cp[1] == '"') 642 cp++; /* Skip both */ 643 else if (*cp == '"') 644 quoted = !quoted; 645 } 646 /* Skip remaining whitespace. */ 647 for (; *cp == ' ' || *cp == '\t'; cp++) 648 ; 649 if (key_read(found, &cp) != 1) { 650 debug2("user_key_allowed: advance: '%s'", cp); 651 /* still no key? advance to next line*/ 652 continue; 653 } 654 } 655 if (key_equal(found, key) && 656 auth_parse_options(pw, options, file, linenum) == 1) { 657 found_key = 1; 658 debug("matching key found: file %s, line %lu", 659 file, linenum); 660 fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX); 661 verbose("Found matching %s key: %s", 662 key_type(found), fp); 663 xfree(fp); 664 break; 665 } 666 } 667 restore_uid(); 668 fclose(f); 669 key_free(found); 670 if (!found_key) 671 debug2("key not found"); 672 return found_key; 673 } 674 675 /* check whether given key is in .ssh/authorized_keys* */ 676 static int 677 user_key_allowed(struct passwd *pw, Key *key) 678 { 679 int success; 680 char *file; 681 682 file = authorized_keys_file(pw); 683 success = user_key_allowed2(pw, key, file); 684 xfree(file); 685 if (success) 686 return success; 687 688 /* try suffix "2" for backward compat, too */ 689 file = authorized_keys_file2(pw); 690 success = user_key_allowed2(pw, key, file); 691 xfree(file); 692 return success; 693 } 694 695 /* return 1 if given hostkey is allowed */ 696 static int 697 hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost, 698 Key *key) 699 { 700 const char *resolvedname, *ipaddr, *lookup; 701 HostStatus host_status; 702 int len; 703 704 resolvedname = get_canonical_hostname(options.verify_reverse_mapping); 705 ipaddr = get_remote_ipaddr(); 706 707 debug2("userauth_hostbased: chost %s resolvedname %s ipaddr %s", 708 chost, resolvedname, ipaddr); 709 710 if (options.hostbased_uses_name_from_packet_only) { 711 if (auth_rhosts2(pw, cuser, chost, chost) == 0) 712 return 0; 713 lookup = chost; 714 } else { 715 if (((len = strlen(chost)) > 0) && chost[len - 1] == '.') { 716 debug2("stripping trailing dot from chost %s", chost); 717 chost[len - 1] = '\0'; 718 } 719 if (strcasecmp(resolvedname, chost) != 0) 720 log("userauth_hostbased mismatch: " 721 "client sends %s, but we resolve %s to %s", 722 chost, ipaddr, resolvedname); 723 if (auth_rhosts2(pw, cuser, resolvedname, ipaddr) == 0) 724 return 0; 725 lookup = resolvedname; 726 } 727 debug2("userauth_hostbased: access allowed by auth_rhosts2"); 728 729 host_status = check_key_in_hostfiles(pw, key, lookup, 730 _PATH_SSH_SYSTEM_HOSTFILE, 731 options.ignore_user_known_hosts ? NULL : _PATH_SSH_USER_HOSTFILE); 732 733 /* backward compat if no key has been found. */ 734 if (host_status == HOST_NEW) 735 host_status = check_key_in_hostfiles(pw, key, lookup, 736 _PATH_SSH_SYSTEM_HOSTFILE2, 737 options.ignore_user_known_hosts ? NULL : 738 _PATH_SSH_USER_HOSTFILE2); 739 740 return (host_status == HOST_OK); 741 } 742 743