1 /* $OpenBSD: monitor_wrap.c,v 1.92 2017/05/30 14:10:53 markus Exp $ */ 2 /* 3 * Copyright 2002 Niels Provos <provos@citi.umich.edu> 4 * Copyright 2002 Markus Friedl <markus@openbsd.org> 5 * 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/types.h> 29 #include <sys/uio.h> 30 #include <sys/queue.h> 31 32 #include <errno.h> 33 #include <pwd.h> 34 #include <signal.h> 35 #include <stdio.h> 36 #include <string.h> 37 #include <unistd.h> 38 39 #ifdef WITH_OPENSSL 40 #include <openssl/bn.h> 41 #include <openssl/dh.h> 42 #endif 43 44 #include "xmalloc.h" 45 #include "ssh.h" 46 #ifdef WITH_OPENSSL 47 #include "dh.h" 48 #endif 49 #include "buffer.h" 50 #include "key.h" 51 #include "cipher.h" 52 #include "kex.h" 53 #include "hostfile.h" 54 #include "auth.h" 55 #include "auth-options.h" 56 #include "packet.h" 57 #include "mac.h" 58 #include "log.h" 59 #include <zlib.h> 60 #include "monitor.h" 61 #ifdef GSSAPI 62 #include "ssh-gss.h" 63 #endif 64 #include "monitor_wrap.h" 65 #include "atomicio.h" 66 #include "monitor_fdpass.h" 67 #include "misc.h" 68 #include "uuencode.h" 69 70 #include "channels.h" 71 #include "session.h" 72 #include "servconf.h" 73 74 #include "ssherr.h" 75 76 /* Imports */ 77 extern z_stream incoming_stream; 78 extern z_stream outgoing_stream; 79 extern struct monitor *pmonitor; 80 extern Buffer loginmsg; 81 extern ServerOptions options; 82 83 void 84 mm_log_handler(LogLevel level, const char *msg, void *ctx) 85 { 86 Buffer log_msg; 87 struct monitor *mon = (struct monitor *)ctx; 88 89 if (mon->m_log_sendfd == -1) 90 fatal("%s: no log channel", __func__); 91 92 buffer_init(&log_msg); 93 /* 94 * Placeholder for packet length. Will be filled in with the actual 95 * packet length once the packet has been constucted. This saves 96 * fragile math. 97 */ 98 buffer_put_int(&log_msg, 0); 99 100 buffer_put_int(&log_msg, level); 101 buffer_put_cstring(&log_msg, msg); 102 put_u32(buffer_ptr(&log_msg), buffer_len(&log_msg) - 4); 103 if (atomicio(vwrite, mon->m_log_sendfd, buffer_ptr(&log_msg), 104 buffer_len(&log_msg)) != buffer_len(&log_msg)) 105 fatal("%s: write: %s", __func__, strerror(errno)); 106 buffer_free(&log_msg); 107 } 108 109 int 110 mm_is_monitor(void) 111 { 112 /* 113 * m_pid is only set in the privileged part, and 114 * points to the unprivileged child. 115 */ 116 return (pmonitor && pmonitor->m_pid > 0); 117 } 118 119 void 120 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) 121 { 122 u_int mlen = buffer_len(m); 123 u_char buf[5]; 124 125 debug3("%s entering: type %d", __func__, type); 126 127 put_u32(buf, mlen + 1); 128 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ 129 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) 130 fatal("%s: write: %s", __func__, strerror(errno)); 131 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) 132 fatal("%s: write: %s", __func__, strerror(errno)); 133 } 134 135 void 136 mm_request_receive(int sock, Buffer *m) 137 { 138 u_char buf[4]; 139 u_int msg_len; 140 141 debug3("%s entering", __func__); 142 143 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { 144 if (errno == EPIPE) 145 cleanup_exit(255); 146 fatal("%s: read: %s", __func__, strerror(errno)); 147 } 148 msg_len = get_u32(buf); 149 if (msg_len > 256 * 1024) 150 fatal("%s: read: bad msg_len %d", __func__, msg_len); 151 buffer_clear(m); 152 buffer_append_space(m, msg_len); 153 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) 154 fatal("%s: read: %s", __func__, strerror(errno)); 155 } 156 157 void 158 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) 159 { 160 u_char rtype; 161 162 debug3("%s entering: type %d", __func__, type); 163 164 mm_request_receive(sock, m); 165 rtype = buffer_get_char(m); 166 if (rtype != type) 167 fatal("%s: read: rtype %d != type %d", __func__, 168 rtype, type); 169 } 170 171 #ifdef WITH_OPENSSL 172 DH * 173 mm_choose_dh(int min, int nbits, int max) 174 { 175 BIGNUM *p, *g; 176 int success = 0; 177 Buffer m; 178 179 buffer_init(&m); 180 buffer_put_int(&m, min); 181 buffer_put_int(&m, nbits); 182 buffer_put_int(&m, max); 183 184 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); 185 186 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); 187 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); 188 189 success = buffer_get_char(&m); 190 if (success == 0) 191 fatal("%s: MONITOR_ANS_MODULI failed", __func__); 192 193 if ((p = BN_new()) == NULL) 194 fatal("%s: BN_new failed", __func__); 195 if ((g = BN_new()) == NULL) 196 fatal("%s: BN_new failed", __func__); 197 buffer_get_bignum2(&m, p); 198 buffer_get_bignum2(&m, g); 199 200 debug3("%s: remaining %d", __func__, buffer_len(&m)); 201 buffer_free(&m); 202 203 return (dh_new_group(g, p)); 204 } 205 #endif 206 207 int 208 mm_key_sign(struct sshkey *key, u_char **sigp, u_int *lenp, 209 const u_char *data, u_int datalen, const char *hostkey_alg) 210 { 211 struct kex *kex = *pmonitor->m_pkex; 212 Buffer m; 213 214 debug3("%s entering", __func__); 215 216 buffer_init(&m); 217 buffer_put_int(&m, kex->host_key_index(key, 0, active_state)); 218 buffer_put_string(&m, data, datalen); 219 buffer_put_cstring(&m, hostkey_alg); 220 221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); 222 223 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); 224 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); 225 *sigp = buffer_get_string(&m, lenp); 226 buffer_free(&m); 227 228 return (0); 229 } 230 231 struct passwd * 232 mm_getpwnamallow(const char *username) 233 { 234 Buffer m; 235 struct passwd *pw; 236 u_int len, i; 237 ServerOptions *newopts; 238 239 debug3("%s entering", __func__); 240 241 buffer_init(&m); 242 buffer_put_cstring(&m, username); 243 244 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); 245 246 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); 247 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); 248 249 if (buffer_get_char(&m) == 0) { 250 pw = NULL; 251 goto out; 252 } 253 pw = buffer_get_string(&m, &len); 254 if (len != sizeof(struct passwd)) 255 fatal("%s: struct passwd size mismatch", __func__); 256 pw->pw_name = buffer_get_string(&m, NULL); 257 pw->pw_passwd = buffer_get_string(&m, NULL); 258 pw->pw_gecos = buffer_get_string(&m, NULL); 259 pw->pw_class = buffer_get_string(&m, NULL); 260 pw->pw_dir = buffer_get_string(&m, NULL); 261 pw->pw_shell = buffer_get_string(&m, NULL); 262 263 out: 264 /* copy options block as a Match directive may have changed some */ 265 newopts = buffer_get_string(&m, &len); 266 if (len != sizeof(*newopts)) 267 fatal("%s: option block size mismatch", __func__); 268 269 #define M_CP_STROPT(x) do { \ 270 if (newopts->x != NULL) \ 271 newopts->x = buffer_get_string(&m, NULL); \ 272 } while (0) 273 #define M_CP_STRARRAYOPT(x, nx) do { \ 274 for (i = 0; i < newopts->nx; i++) \ 275 newopts->x[i] = buffer_get_string(&m, NULL); \ 276 } while (0) 277 /* See comment in servconf.h */ 278 COPY_MATCH_STRING_OPTS(); 279 #undef M_CP_STROPT 280 #undef M_CP_STRARRAYOPT 281 282 copy_set_server_options(&options, newopts, 1); 283 log_change_level(options.log_level); 284 free(newopts); 285 286 buffer_free(&m); 287 288 return (pw); 289 } 290 291 char * 292 mm_auth2_read_banner(void) 293 { 294 Buffer m; 295 char *banner; 296 297 debug3("%s entering", __func__); 298 299 buffer_init(&m); 300 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 301 buffer_clear(&m); 302 303 mm_request_receive_expect(pmonitor->m_recvfd, 304 MONITOR_ANS_AUTH2_READ_BANNER, &m); 305 banner = buffer_get_string(&m, NULL); 306 buffer_free(&m); 307 308 /* treat empty banner as missing banner */ 309 if (strlen(banner) == 0) { 310 free(banner); 311 banner = NULL; 312 } 313 return (banner); 314 } 315 316 /* Inform the privileged process about service and style */ 317 318 void 319 mm_inform_authserv(char *service, char *style) 320 { 321 Buffer m; 322 323 debug3("%s entering", __func__); 324 325 buffer_init(&m); 326 buffer_put_cstring(&m, service); 327 buffer_put_cstring(&m, style ? style : ""); 328 329 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 330 331 buffer_free(&m); 332 } 333 334 /* Do the password authentication */ 335 int 336 mm_auth_password(Authctxt *authctxt, char *password) 337 { 338 Buffer m; 339 int authenticated = 0; 340 341 debug3("%s entering", __func__); 342 343 buffer_init(&m); 344 buffer_put_cstring(&m, password); 345 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 346 347 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 348 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 349 350 authenticated = buffer_get_int(&m); 351 352 buffer_free(&m); 353 354 debug3("%s: user %sauthenticated", 355 __func__, authenticated ? "" : "not "); 356 return (authenticated); 357 } 358 359 int 360 mm_user_key_allowed(struct passwd *pw, struct sshkey *key, 361 int pubkey_auth_attempt) 362 { 363 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key, 364 pubkey_auth_attempt)); 365 } 366 367 int 368 mm_hostbased_key_allowed(struct passwd *pw, const char *user, const char *host, 369 struct sshkey *key) 370 { 371 return (mm_key_allowed(MM_HOSTKEY, user, host, key, 0)); 372 } 373 374 int 375 mm_key_allowed(enum mm_keytype type, const char *user, const char *host, 376 struct sshkey *key, int pubkey_auth_attempt) 377 { 378 Buffer m; 379 u_char *blob; 380 u_int len; 381 int allowed = 0, have_forced = 0; 382 383 debug3("%s entering", __func__); 384 385 /* Convert the key to a blob and the pass it over */ 386 if (!key_to_blob(key, &blob, &len)) 387 return (0); 388 389 buffer_init(&m); 390 buffer_put_int(&m, type); 391 buffer_put_cstring(&m, user ? user : ""); 392 buffer_put_cstring(&m, host ? host : ""); 393 buffer_put_string(&m, blob, len); 394 buffer_put_int(&m, pubkey_auth_attempt); 395 free(blob); 396 397 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 398 399 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 400 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 401 402 allowed = buffer_get_int(&m); 403 404 /* fake forced command */ 405 auth_clear_options(); 406 have_forced = buffer_get_int(&m); 407 forced_command = have_forced ? xstrdup("true") : NULL; 408 409 buffer_free(&m); 410 411 return (allowed); 412 } 413 414 /* 415 * This key verify needs to send the key type along, because the 416 * privileged parent makes the decision if the key is allowed 417 * for authentication. 418 */ 419 420 int 421 mm_sshkey_verify(const struct sshkey *key, const u_char *sig, size_t siglen, 422 const u_char *data, size_t datalen, u_int compat) 423 { 424 Buffer m; 425 u_char *blob; 426 u_int len; 427 u_int encoded_ret = 0; 428 429 debug3("%s entering", __func__); 430 431 /* Convert the key to a blob and the pass it over */ 432 if (!key_to_blob(key, &blob, &len)) 433 return (0); 434 435 buffer_init(&m); 436 buffer_put_string(&m, blob, len); 437 buffer_put_string(&m, sig, siglen); 438 buffer_put_string(&m, data, datalen); 439 free(blob); 440 441 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 442 443 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 444 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 445 446 encoded_ret = buffer_get_int(&m); 447 448 buffer_free(&m); 449 450 if (encoded_ret != 0) 451 return SSH_ERR_SIGNATURE_INVALID; 452 return 0; 453 } 454 455 void 456 mm_send_keystate(struct monitor *monitor) 457 { 458 struct ssh *ssh = active_state; /* XXX */ 459 struct sshbuf *m; 460 int r; 461 462 if ((m = sshbuf_new()) == NULL) 463 fatal("%s: sshbuf_new failed", __func__); 464 if ((r = ssh_packet_get_state(ssh, m)) != 0) 465 fatal("%s: get_state failed: %s", 466 __func__, ssh_err(r)); 467 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, m); 468 debug3("%s: Finished sending state", __func__); 469 sshbuf_free(m); 470 } 471 472 int 473 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 474 { 475 Buffer m; 476 char *p, *msg; 477 int success = 0, tmp1 = -1, tmp2 = -1; 478 479 /* Kludge: ensure there are fds free to receive the pty/tty */ 480 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 481 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 482 error("%s: cannot allocate fds for pty", __func__); 483 if (tmp1 > 0) 484 close(tmp1); 485 if (tmp2 > 0) 486 close(tmp2); 487 return 0; 488 } 489 close(tmp1); 490 close(tmp2); 491 492 buffer_init(&m); 493 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 494 495 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 496 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 497 498 success = buffer_get_int(&m); 499 if (success == 0) { 500 debug3("%s: pty alloc failed", __func__); 501 buffer_free(&m); 502 return (0); 503 } 504 p = buffer_get_string(&m, NULL); 505 msg = buffer_get_string(&m, NULL); 506 buffer_free(&m); 507 508 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 509 free(p); 510 511 buffer_append(&loginmsg, msg, strlen(msg)); 512 free(msg); 513 514 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 515 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 516 fatal("%s: receive fds failed", __func__); 517 518 /* Success */ 519 return (1); 520 } 521 522 void 523 mm_session_pty_cleanup2(Session *s) 524 { 525 Buffer m; 526 527 if (s->ttyfd == -1) 528 return; 529 buffer_init(&m); 530 buffer_put_cstring(&m, s->tty); 531 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 532 buffer_free(&m); 533 534 /* closed dup'ed master */ 535 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 536 error("close(s->ptymaster/%d): %s", 537 s->ptymaster, strerror(errno)); 538 539 /* unlink pty from session */ 540 s->ttyfd = -1; 541 } 542 543 /* Request process termination */ 544 545 void 546 mm_terminate(void) 547 { 548 Buffer m; 549 550 buffer_init(&m); 551 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 552 buffer_free(&m); 553 } 554 555 static void 556 mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 557 char ***prompts, u_int **echo_on) 558 { 559 *name = xstrdup(""); 560 *infotxt = xstrdup(""); 561 *numprompts = 1; 562 *prompts = xcalloc(*numprompts, sizeof(char *)); 563 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 564 (*echo_on)[0] = 0; 565 } 566 567 int 568 mm_bsdauth_query(void *ctx, char **name, char **infotxt, 569 u_int *numprompts, char ***prompts, u_int **echo_on) 570 { 571 Buffer m; 572 u_int success; 573 char *challenge; 574 575 debug3("%s: entering", __func__); 576 577 buffer_init(&m); 578 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 579 580 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 581 &m); 582 success = buffer_get_int(&m); 583 if (success == 0) { 584 debug3("%s: no challenge", __func__); 585 buffer_free(&m); 586 return (-1); 587 } 588 589 /* Get the challenge, and format the response */ 590 challenge = buffer_get_string(&m, NULL); 591 buffer_free(&m); 592 593 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 594 (*prompts)[0] = challenge; 595 596 debug3("%s: received challenge: %s", __func__, challenge); 597 598 return (0); 599 } 600 601 int 602 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 603 { 604 Buffer m; 605 int authok; 606 607 debug3("%s: entering", __func__); 608 if (numresponses != 1) 609 return (-1); 610 611 buffer_init(&m); 612 buffer_put_cstring(&m, responses[0]); 613 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 614 615 mm_request_receive_expect(pmonitor->m_recvfd, 616 MONITOR_ANS_BSDAUTHRESPOND, &m); 617 618 authok = buffer_get_int(&m); 619 buffer_free(&m); 620 621 return ((authok == 0) ? -1 : 0); 622 } 623 624 #ifdef GSSAPI 625 OM_uint32 626 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 627 { 628 Buffer m; 629 OM_uint32 major; 630 631 /* Client doesn't get to see the context */ 632 *ctx = NULL; 633 634 buffer_init(&m); 635 buffer_put_string(&m, goid->elements, goid->length); 636 637 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 638 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 639 640 major = buffer_get_int(&m); 641 642 buffer_free(&m); 643 return (major); 644 } 645 646 OM_uint32 647 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 648 gss_buffer_desc *out, OM_uint32 *flags) 649 { 650 Buffer m; 651 OM_uint32 major; 652 u_int len; 653 654 buffer_init(&m); 655 buffer_put_string(&m, in->value, in->length); 656 657 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 658 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 659 660 major = buffer_get_int(&m); 661 out->value = buffer_get_string(&m, &len); 662 out->length = len; 663 if (flags) 664 *flags = buffer_get_int(&m); 665 666 buffer_free(&m); 667 668 return (major); 669 } 670 671 OM_uint32 672 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 673 { 674 Buffer m; 675 OM_uint32 major; 676 677 buffer_init(&m); 678 buffer_put_string(&m, gssbuf->value, gssbuf->length); 679 buffer_put_string(&m, gssmic->value, gssmic->length); 680 681 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 682 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 683 &m); 684 685 major = buffer_get_int(&m); 686 buffer_free(&m); 687 return(major); 688 } 689 690 int 691 mm_ssh_gssapi_userok(char *user) 692 { 693 Buffer m; 694 int authenticated = 0; 695 696 buffer_init(&m); 697 698 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 699 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 700 &m); 701 702 authenticated = buffer_get_int(&m); 703 704 buffer_free(&m); 705 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 706 return (authenticated); 707 } 708 #endif /* GSSAPI */ 709 710