1 /* $OpenBSD: monitor_wrap.c,v 1.95 2017/10/05 15:52:03 djm 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 struct ssh *ssh = active_state; /* XXX */ 235 Buffer m; 236 struct passwd *pw; 237 u_int len, i; 238 ServerOptions *newopts; 239 240 debug3("%s entering", __func__); 241 242 buffer_init(&m); 243 buffer_put_cstring(&m, username); 244 245 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); 246 247 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); 248 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); 249 250 if (buffer_get_char(&m) == 0) { 251 pw = NULL; 252 goto out; 253 } 254 pw = buffer_get_string(&m, &len); 255 if (len != sizeof(struct passwd)) 256 fatal("%s: struct passwd size mismatch", __func__); 257 pw->pw_name = buffer_get_string(&m, NULL); 258 pw->pw_passwd = buffer_get_string(&m, NULL); 259 pw->pw_gecos = buffer_get_string(&m, NULL); 260 pw->pw_class = buffer_get_string(&m, NULL); 261 pw->pw_dir = buffer_get_string(&m, NULL); 262 pw->pw_shell = buffer_get_string(&m, NULL); 263 264 out: 265 /* copy options block as a Match directive may have changed some */ 266 newopts = buffer_get_string(&m, &len); 267 if (len != sizeof(*newopts)) 268 fatal("%s: option block size mismatch", __func__); 269 270 #define M_CP_STROPT(x) do { \ 271 if (newopts->x != NULL) \ 272 newopts->x = buffer_get_string(&m, NULL); \ 273 } while (0) 274 #define M_CP_STRARRAYOPT(x, nx) do { \ 275 newopts->x = newopts->nx == 0 ? \ 276 NULL : xcalloc(newopts->nx, sizeof(*newopts->x)); \ 277 for (i = 0; i < newopts->nx; i++) \ 278 newopts->x[i] = buffer_get_string(&m, NULL); \ 279 } while (0) 280 /* See comment in servconf.h */ 281 COPY_MATCH_STRING_OPTS(); 282 #undef M_CP_STROPT 283 #undef M_CP_STRARRAYOPT 284 285 copy_set_server_options(&options, newopts, 1); 286 log_change_level(options.log_level); 287 process_permitopen(ssh, &options); 288 free(newopts); 289 290 buffer_free(&m); 291 292 return (pw); 293 } 294 295 char * 296 mm_auth2_read_banner(void) 297 { 298 Buffer m; 299 char *banner; 300 301 debug3("%s entering", __func__); 302 303 buffer_init(&m); 304 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 305 buffer_clear(&m); 306 307 mm_request_receive_expect(pmonitor->m_recvfd, 308 MONITOR_ANS_AUTH2_READ_BANNER, &m); 309 banner = buffer_get_string(&m, NULL); 310 buffer_free(&m); 311 312 /* treat empty banner as missing banner */ 313 if (strlen(banner) == 0) { 314 free(banner); 315 banner = NULL; 316 } 317 return (banner); 318 } 319 320 /* Inform the privileged process about service and style */ 321 322 void 323 mm_inform_authserv(char *service, char *style) 324 { 325 Buffer m; 326 327 debug3("%s entering", __func__); 328 329 buffer_init(&m); 330 buffer_put_cstring(&m, service); 331 buffer_put_cstring(&m, style ? style : ""); 332 333 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 334 335 buffer_free(&m); 336 } 337 338 /* Do the password authentication */ 339 int 340 mm_auth_password(Authctxt *authctxt, char *password) 341 { 342 Buffer m; 343 int authenticated = 0; 344 345 debug3("%s entering", __func__); 346 347 buffer_init(&m); 348 buffer_put_cstring(&m, password); 349 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 350 351 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 352 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 353 354 authenticated = buffer_get_int(&m); 355 356 buffer_free(&m); 357 358 debug3("%s: user %sauthenticated", 359 __func__, authenticated ? "" : "not "); 360 return (authenticated); 361 } 362 363 int 364 mm_user_key_allowed(struct passwd *pw, struct sshkey *key, 365 int pubkey_auth_attempt) 366 { 367 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key, 368 pubkey_auth_attempt)); 369 } 370 371 int 372 mm_hostbased_key_allowed(struct passwd *pw, const char *user, const char *host, 373 struct sshkey *key) 374 { 375 return (mm_key_allowed(MM_HOSTKEY, user, host, key, 0)); 376 } 377 378 int 379 mm_key_allowed(enum mm_keytype type, const char *user, const char *host, 380 struct sshkey *key, int pubkey_auth_attempt) 381 { 382 Buffer m; 383 u_char *blob; 384 u_int len; 385 int allowed = 0, have_forced = 0; 386 387 debug3("%s entering", __func__); 388 389 /* Convert the key to a blob and the pass it over */ 390 if (!key_to_blob(key, &blob, &len)) 391 return (0); 392 393 buffer_init(&m); 394 buffer_put_int(&m, type); 395 buffer_put_cstring(&m, user ? user : ""); 396 buffer_put_cstring(&m, host ? host : ""); 397 buffer_put_string(&m, blob, len); 398 buffer_put_int(&m, pubkey_auth_attempt); 399 free(blob); 400 401 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 402 403 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 404 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 405 406 allowed = buffer_get_int(&m); 407 408 /* fake forced command */ 409 auth_clear_options(); 410 have_forced = buffer_get_int(&m); 411 forced_command = have_forced ? xstrdup("true") : NULL; 412 413 buffer_free(&m); 414 415 return (allowed); 416 } 417 418 /* 419 * This key verify needs to send the key type along, because the 420 * privileged parent makes the decision if the key is allowed 421 * for authentication. 422 */ 423 424 int 425 mm_sshkey_verify(const struct sshkey *key, const u_char *sig, size_t siglen, 426 const u_char *data, size_t datalen, u_int compat) 427 { 428 Buffer m; 429 u_char *blob; 430 u_int len; 431 u_int encoded_ret = 0; 432 433 debug3("%s entering", __func__); 434 435 /* Convert the key to a blob and the pass it over */ 436 if (!key_to_blob(key, &blob, &len)) 437 return (0); 438 439 buffer_init(&m); 440 buffer_put_string(&m, blob, len); 441 buffer_put_string(&m, sig, siglen); 442 buffer_put_string(&m, data, datalen); 443 free(blob); 444 445 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 446 447 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 448 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 449 450 encoded_ret = buffer_get_int(&m); 451 452 buffer_free(&m); 453 454 if (encoded_ret != 0) 455 return SSH_ERR_SIGNATURE_INVALID; 456 return 0; 457 } 458 459 void 460 mm_send_keystate(struct monitor *monitor) 461 { 462 struct ssh *ssh = active_state; /* XXX */ 463 struct sshbuf *m; 464 int r; 465 466 if ((m = sshbuf_new()) == NULL) 467 fatal("%s: sshbuf_new failed", __func__); 468 if ((r = ssh_packet_get_state(ssh, m)) != 0) 469 fatal("%s: get_state failed: %s", 470 __func__, ssh_err(r)); 471 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, m); 472 debug3("%s: Finished sending state", __func__); 473 sshbuf_free(m); 474 } 475 476 int 477 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 478 { 479 Buffer m; 480 char *p, *msg; 481 int success = 0, tmp1 = -1, tmp2 = -1; 482 483 /* Kludge: ensure there are fds free to receive the pty/tty */ 484 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 485 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 486 error("%s: cannot allocate fds for pty", __func__); 487 if (tmp1 > 0) 488 close(tmp1); 489 if (tmp2 > 0) 490 close(tmp2); 491 return 0; 492 } 493 close(tmp1); 494 close(tmp2); 495 496 buffer_init(&m); 497 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 498 499 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 500 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 501 502 success = buffer_get_int(&m); 503 if (success == 0) { 504 debug3("%s: pty alloc failed", __func__); 505 buffer_free(&m); 506 return (0); 507 } 508 p = buffer_get_string(&m, NULL); 509 msg = buffer_get_string(&m, NULL); 510 buffer_free(&m); 511 512 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 513 free(p); 514 515 buffer_append(&loginmsg, msg, strlen(msg)); 516 free(msg); 517 518 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 519 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 520 fatal("%s: receive fds failed", __func__); 521 522 /* Success */ 523 return (1); 524 } 525 526 void 527 mm_session_pty_cleanup2(Session *s) 528 { 529 Buffer m; 530 531 if (s->ttyfd == -1) 532 return; 533 buffer_init(&m); 534 buffer_put_cstring(&m, s->tty); 535 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 536 buffer_free(&m); 537 538 /* closed dup'ed master */ 539 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 540 error("close(s->ptymaster/%d): %s", 541 s->ptymaster, strerror(errno)); 542 543 /* unlink pty from session */ 544 s->ttyfd = -1; 545 } 546 547 /* Request process termination */ 548 549 void 550 mm_terminate(void) 551 { 552 Buffer m; 553 554 buffer_init(&m); 555 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 556 buffer_free(&m); 557 } 558 559 static void 560 mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 561 char ***prompts, u_int **echo_on) 562 { 563 *name = xstrdup(""); 564 *infotxt = xstrdup(""); 565 *numprompts = 1; 566 *prompts = xcalloc(*numprompts, sizeof(char *)); 567 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 568 (*echo_on)[0] = 0; 569 } 570 571 int 572 mm_bsdauth_query(void *ctx, char **name, char **infotxt, 573 u_int *numprompts, char ***prompts, u_int **echo_on) 574 { 575 Buffer m; 576 u_int success; 577 char *challenge; 578 579 debug3("%s: entering", __func__); 580 581 buffer_init(&m); 582 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 583 584 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 585 &m); 586 success = buffer_get_int(&m); 587 if (success == 0) { 588 debug3("%s: no challenge", __func__); 589 buffer_free(&m); 590 return (-1); 591 } 592 593 /* Get the challenge, and format the response */ 594 challenge = buffer_get_string(&m, NULL); 595 buffer_free(&m); 596 597 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 598 (*prompts)[0] = challenge; 599 600 debug3("%s: received challenge: %s", __func__, challenge); 601 602 return (0); 603 } 604 605 int 606 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 607 { 608 Buffer m; 609 int authok; 610 611 debug3("%s: entering", __func__); 612 if (numresponses != 1) 613 return (-1); 614 615 buffer_init(&m); 616 buffer_put_cstring(&m, responses[0]); 617 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 618 619 mm_request_receive_expect(pmonitor->m_recvfd, 620 MONITOR_ANS_BSDAUTHRESPOND, &m); 621 622 authok = buffer_get_int(&m); 623 buffer_free(&m); 624 625 return ((authok == 0) ? -1 : 0); 626 } 627 628 #ifdef GSSAPI 629 OM_uint32 630 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 631 { 632 Buffer m; 633 OM_uint32 major; 634 635 /* Client doesn't get to see the context */ 636 *ctx = NULL; 637 638 buffer_init(&m); 639 buffer_put_string(&m, goid->elements, goid->length); 640 641 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 642 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 643 644 major = buffer_get_int(&m); 645 646 buffer_free(&m); 647 return (major); 648 } 649 650 OM_uint32 651 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 652 gss_buffer_desc *out, OM_uint32 *flags) 653 { 654 Buffer m; 655 OM_uint32 major; 656 u_int len; 657 658 buffer_init(&m); 659 buffer_put_string(&m, in->value, in->length); 660 661 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 662 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 663 664 major = buffer_get_int(&m); 665 out->value = buffer_get_string(&m, &len); 666 out->length = len; 667 if (flags) 668 *flags = buffer_get_int(&m); 669 670 buffer_free(&m); 671 672 return (major); 673 } 674 675 OM_uint32 676 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 677 { 678 Buffer m; 679 OM_uint32 major; 680 681 buffer_init(&m); 682 buffer_put_string(&m, gssbuf->value, gssbuf->length); 683 buffer_put_string(&m, gssmic->value, gssmic->length); 684 685 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 686 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 687 &m); 688 689 major = buffer_get_int(&m); 690 buffer_free(&m); 691 return(major); 692 } 693 694 int 695 mm_ssh_gssapi_userok(char *user) 696 { 697 Buffer m; 698 int authenticated = 0; 699 700 buffer_init(&m); 701 702 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 703 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 704 &m); 705 706 authenticated = buffer_get_int(&m); 707 708 buffer_free(&m); 709 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 710 return (authenticated); 711 } 712 #endif /* GSSAPI */ 713 714