1 /* $NetBSD: monitor_wrap.c,v 1.2 2009/06/07 22:38:46 christos Exp $ */ 2 /* $OpenBSD: monitor_wrap.c,v 1.64 2008/11/04 08:22:13 djm Exp $ */ 3 /* 4 * Copyright 2002 Niels Provos <provos@citi.umich.edu> 5 * Copyright 2002 Markus Friedl <markus@openbsd.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "includes.h" 30 __RCSID("$NetBSD: monitor_wrap.c,v 1.2 2009/06/07 22:38:46 christos Exp $"); 31 #include <sys/types.h> 32 #include <sys/uio.h> 33 #include <sys/queue.h> 34 35 #include <openssl/bn.h> 36 #include <openssl/dh.h> 37 #include <openssl/evp.h> 38 39 #include <errno.h> 40 #include <pwd.h> 41 #include <signal.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #include "xmalloc.h" 47 #include "ssh.h" 48 #include "dh.h" 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 #ifdef USE_PAM 68 #include "servconf.h" 69 #include <security/pam_appl.h> 70 #endif 71 #include "misc.h" 72 #include "jpake.h" 73 74 #include "channels.h" 75 #include "session.h" 76 #include "servconf.h" 77 78 /* Imports */ 79 extern int compat20; 80 extern Newkeys *newkeys[]; 81 extern z_stream incoming_stream; 82 extern z_stream outgoing_stream; 83 extern struct monitor *pmonitor; 84 extern Buffer input, output; 85 extern Buffer loginmsg; 86 extern ServerOptions options; 87 88 int 89 mm_is_monitor(void) 90 { 91 /* 92 * m_pid is only set in the privileged part, and 93 * points to the unprivileged child. 94 */ 95 return (pmonitor && pmonitor->m_pid > 0); 96 } 97 98 void 99 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) 100 { 101 u_int mlen = buffer_len(m); 102 u_char buf[5]; 103 104 debug3("%s entering: type %d", __func__, type); 105 106 put_u32(buf, mlen + 1); 107 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ 108 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) 109 fatal("%s: write: %s", __func__, strerror(errno)); 110 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) 111 fatal("%s: write: %s", __func__, strerror(errno)); 112 } 113 114 void 115 mm_request_receive(int sock, Buffer *m) 116 { 117 u_char buf[4]; 118 u_int msg_len; 119 120 debug3("%s entering", __func__); 121 122 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { 123 if (errno == EPIPE) 124 cleanup_exit(255); 125 fatal("%s: read: %s", __func__, strerror(errno)); 126 } 127 msg_len = get_u32(buf); 128 if (msg_len > 256 * 1024) 129 fatal("%s: read: bad msg_len %d", __func__, msg_len); 130 buffer_clear(m); 131 buffer_append_space(m, msg_len); 132 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) 133 fatal("%s: read: %s", __func__, strerror(errno)); 134 } 135 136 void 137 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) 138 { 139 u_char rtype; 140 141 debug3("%s entering: type %d", __func__, type); 142 143 mm_request_receive(sock, m); 144 rtype = buffer_get_char(m); 145 if (rtype != type) 146 fatal("%s: read: rtype %d != type %d", __func__, 147 rtype, type); 148 } 149 150 DH * 151 mm_choose_dh(int min, int nbits, int max) 152 { 153 BIGNUM *p, *g; 154 int success = 0; 155 Buffer m; 156 157 buffer_init(&m); 158 buffer_put_int(&m, min); 159 buffer_put_int(&m, nbits); 160 buffer_put_int(&m, max); 161 162 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); 163 164 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); 165 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); 166 167 success = buffer_get_char(&m); 168 if (success == 0) 169 fatal("%s: MONITOR_ANS_MODULI failed", __func__); 170 171 if ((p = BN_new()) == NULL) 172 fatal("%s: BN_new failed", __func__); 173 if ((g = BN_new()) == NULL) 174 fatal("%s: BN_new failed", __func__); 175 buffer_get_bignum2(&m, p); 176 buffer_get_bignum2(&m, g); 177 178 debug3("%s: remaining %d", __func__, buffer_len(&m)); 179 buffer_free(&m); 180 181 return (dh_new_group(g, p)); 182 } 183 184 int 185 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) 186 { 187 Kex *kex = *pmonitor->m_pkex; 188 Buffer m; 189 190 debug3("%s entering", __func__); 191 192 buffer_init(&m); 193 buffer_put_int(&m, kex->host_key_index(key)); 194 buffer_put_string(&m, data, datalen); 195 196 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); 197 198 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); 199 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); 200 *sigp = buffer_get_string(&m, lenp); 201 buffer_free(&m); 202 203 return (0); 204 } 205 206 struct passwd * 207 mm_getpwnamallow(const char *username) 208 { 209 Buffer m; 210 struct passwd *pw; 211 u_int len; 212 ServerOptions *newopts; 213 214 debug3("%s entering", __func__); 215 216 buffer_init(&m); 217 buffer_put_cstring(&m, username); 218 219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); 220 221 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); 222 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); 223 224 if (buffer_get_char(&m) == 0) { 225 pw = NULL; 226 goto out; 227 } 228 pw = buffer_get_string(&m, &len); 229 if (len != sizeof(struct passwd)) 230 fatal("%s: struct passwd size mismatch", __func__); 231 pw->pw_name = buffer_get_string(&m, NULL); 232 pw->pw_passwd = buffer_get_string(&m, NULL); 233 pw->pw_gecos = buffer_get_string(&m, NULL); 234 pw->pw_class = buffer_get_string(&m, NULL); 235 pw->pw_dir = buffer_get_string(&m, NULL); 236 pw->pw_shell = buffer_get_string(&m, NULL); 237 238 out: 239 /* copy options block as a Match directive may have changed some */ 240 newopts = buffer_get_string(&m, &len); 241 if (len != sizeof(*newopts)) 242 fatal("%s: option block size mismatch", __func__); 243 if (newopts->banner != NULL) 244 newopts->banner = buffer_get_string(&m, NULL); 245 copy_set_server_options(&options, newopts, 1); 246 xfree(newopts); 247 248 buffer_free(&m); 249 250 return (pw); 251 } 252 253 char * 254 mm_auth2_read_banner(void) 255 { 256 Buffer m; 257 char *banner; 258 259 debug3("%s entering", __func__); 260 261 buffer_init(&m); 262 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 263 buffer_clear(&m); 264 265 mm_request_receive_expect(pmonitor->m_recvfd, 266 MONITOR_ANS_AUTH2_READ_BANNER, &m); 267 banner = buffer_get_string(&m, NULL); 268 buffer_free(&m); 269 270 /* treat empty banner as missing banner */ 271 if (strlen(banner) == 0) { 272 xfree(banner); 273 banner = NULL; 274 } 275 return (banner); 276 } 277 278 /* Inform the privileged process about service and style */ 279 280 void 281 mm_inform_authserv(char *service, char *style) 282 { 283 Buffer m; 284 285 debug3("%s entering", __func__); 286 287 buffer_init(&m); 288 buffer_put_cstring(&m, service); 289 buffer_put_cstring(&m, style ? style : ""); 290 291 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 292 293 buffer_free(&m); 294 } 295 296 /* Do the password authentication */ 297 int 298 mm_auth_password(Authctxt *authctxt, char *password) 299 { 300 Buffer m; 301 int authenticated = 0; 302 303 debug3("%s entering", __func__); 304 305 buffer_init(&m); 306 buffer_put_cstring(&m, password); 307 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 308 309 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 310 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 311 312 authenticated = buffer_get_int(&m); 313 314 buffer_free(&m); 315 316 debug3("%s: user %sauthenticated", 317 __func__, authenticated ? "" : "not "); 318 return (authenticated); 319 } 320 321 int 322 mm_user_key_allowed(struct passwd *pw, Key *key) 323 { 324 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); 325 } 326 327 int 328 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, 329 Key *key) 330 { 331 return (mm_key_allowed(MM_HOSTKEY, user, host, key)); 332 } 333 334 int 335 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, 336 char *host, Key *key) 337 { 338 int ret; 339 340 key->type = KEY_RSA; /* XXX hack for key_to_blob */ 341 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); 342 key->type = KEY_RSA1; 343 return (ret); 344 } 345 346 static void 347 mm_send_debug(Buffer *m) 348 { 349 char *msg; 350 351 while (buffer_len(m)) { 352 msg = buffer_get_string(m, NULL); 353 debug3("%s: Sending debug: %s", __func__, msg); 354 packet_send_debug("%s", msg); 355 xfree(msg); 356 } 357 } 358 359 int 360 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) 361 { 362 Buffer m; 363 u_char *blob; 364 u_int len; 365 int allowed = 0, have_forced = 0; 366 367 debug3("%s entering", __func__); 368 369 /* Convert the key to a blob and the pass it over */ 370 if (!key_to_blob(key, &blob, &len)) 371 return (0); 372 373 buffer_init(&m); 374 buffer_put_int(&m, type); 375 buffer_put_cstring(&m, user ? user : ""); 376 buffer_put_cstring(&m, host ? host : ""); 377 buffer_put_string(&m, blob, len); 378 xfree(blob); 379 380 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 381 382 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 383 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 384 385 allowed = buffer_get_int(&m); 386 387 /* fake forced command */ 388 auth_clear_options(); 389 have_forced = buffer_get_int(&m); 390 forced_command = have_forced ? xstrdup("true") : NULL; 391 392 /* Send potential debug messages */ 393 mm_send_debug(&m); 394 395 buffer_free(&m); 396 397 return (allowed); 398 } 399 400 /* 401 * This key verify needs to send the key type along, because the 402 * privileged parent makes the decision if the key is allowed 403 * for authentication. 404 */ 405 406 int 407 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) 408 { 409 Buffer m; 410 u_char *blob; 411 u_int len; 412 int verified = 0; 413 414 debug3("%s entering", __func__); 415 416 /* Convert the key to a blob and the pass it over */ 417 if (!key_to_blob(key, &blob, &len)) 418 return (0); 419 420 buffer_init(&m); 421 buffer_put_string(&m, blob, len); 422 buffer_put_string(&m, sig, siglen); 423 buffer_put_string(&m, data, datalen); 424 xfree(blob); 425 426 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 427 428 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 429 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 430 431 verified = buffer_get_int(&m); 432 433 buffer_free(&m); 434 435 return (verified); 436 } 437 438 /* Export key state after authentication */ 439 Newkeys * 440 mm_newkeys_from_blob(u_char *blob, int blen) 441 { 442 Buffer b; 443 u_int len; 444 Newkeys *newkey = NULL; 445 Enc *enc; 446 Mac *mac; 447 Comp *comp; 448 449 debug3("%s: %p(%d)", __func__, blob, blen); 450 #ifdef DEBUG_PK 451 dump_base64(stderr, blob, blen); 452 #endif 453 buffer_init(&b); 454 buffer_append(&b, blob, blen); 455 456 newkey = xmalloc(sizeof(*newkey)); 457 enc = &newkey->enc; 458 mac = &newkey->mac; 459 comp = &newkey->comp; 460 461 /* Enc structure */ 462 enc->name = buffer_get_string(&b, NULL); 463 buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); 464 enc->enabled = buffer_get_int(&b); 465 enc->block_size = buffer_get_int(&b); 466 enc->key = buffer_get_string(&b, &enc->key_len); 467 enc->iv = buffer_get_string(&b, &len); 468 if (len != enc->block_size) 469 fatal("%s: bad ivlen: expected %u != %u", __func__, 470 enc->block_size, len); 471 472 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) 473 fatal("%s: bad cipher name %s or pointer %p", __func__, 474 enc->name, enc->cipher); 475 476 /* Mac structure */ 477 mac->name = buffer_get_string(&b, NULL); 478 if (mac->name == NULL || mac_setup(mac, mac->name) == -1) 479 fatal("%s: can not setup mac %s", __func__, mac->name); 480 mac->enabled = buffer_get_int(&b); 481 mac->key = buffer_get_string(&b, &len); 482 if (len > mac->key_len) 483 fatal("%s: bad mac key length: %u > %d", __func__, len, 484 mac->key_len); 485 mac->key_len = len; 486 487 /* Comp structure */ 488 comp->type = buffer_get_int(&b); 489 comp->enabled = buffer_get_int(&b); 490 comp->name = buffer_get_string(&b, NULL); 491 492 len = buffer_len(&b); 493 if (len != 0) 494 error("newkeys_from_blob: remaining bytes in blob %u", len); 495 buffer_free(&b); 496 return (newkey); 497 } 498 499 int 500 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) 501 { 502 Buffer b; 503 int len; 504 Enc *enc; 505 Mac *mac; 506 Comp *comp; 507 Newkeys *newkey = newkeys[mode]; 508 509 debug3("%s: converting %p", __func__, newkey); 510 511 if (newkey == NULL) { 512 error("%s: newkey == NULL", __func__); 513 return 0; 514 } 515 enc = &newkey->enc; 516 mac = &newkey->mac; 517 comp = &newkey->comp; 518 519 buffer_init(&b); 520 /* Enc structure */ 521 buffer_put_cstring(&b, enc->name); 522 /* The cipher struct is constant and shared, you export pointer */ 523 buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); 524 buffer_put_int(&b, enc->enabled); 525 buffer_put_int(&b, enc->block_size); 526 buffer_put_string(&b, enc->key, enc->key_len); 527 packet_get_keyiv(mode, enc->iv, enc->block_size); 528 buffer_put_string(&b, enc->iv, enc->block_size); 529 530 /* Mac structure */ 531 buffer_put_cstring(&b, mac->name); 532 buffer_put_int(&b, mac->enabled); 533 buffer_put_string(&b, mac->key, mac->key_len); 534 535 /* Comp structure */ 536 buffer_put_int(&b, comp->type); 537 buffer_put_int(&b, comp->enabled); 538 buffer_put_cstring(&b, comp->name); 539 540 len = buffer_len(&b); 541 if (lenp != NULL) 542 *lenp = len; 543 if (blobp != NULL) { 544 *blobp = xmalloc(len); 545 memcpy(*blobp, buffer_ptr(&b), len); 546 } 547 memset(buffer_ptr(&b), 0, len); 548 buffer_free(&b); 549 return len; 550 } 551 552 static void 553 mm_send_kex(Buffer *m, Kex *kex) 554 { 555 buffer_put_string(m, kex->session_id, kex->session_id_len); 556 buffer_put_int(m, kex->we_need); 557 buffer_put_int(m, kex->hostkey_type); 558 buffer_put_int(m, kex->kex_type); 559 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); 560 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); 561 buffer_put_int(m, kex->flags); 562 buffer_put_cstring(m, kex->client_version_string); 563 buffer_put_cstring(m, kex->server_version_string); 564 } 565 566 void 567 mm_send_keystate(struct monitor *monitor) 568 { 569 Buffer m; 570 u_char *blob, *p; 571 u_int bloblen, plen; 572 u_int32_t seqnr, packets; 573 u_int64_t blocks, bytes; 574 575 buffer_init(&m); 576 577 if (!compat20) { 578 u_char iv[24]; 579 u_char *key; 580 u_int ivlen, keylen; 581 582 buffer_put_int(&m, packet_get_protocol_flags()); 583 584 buffer_put_int(&m, packet_get_ssh1_cipher()); 585 586 debug3("%s: Sending ssh1 KEY+IV", __func__); 587 keylen = packet_get_encryption_key(NULL); 588 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ 589 keylen = packet_get_encryption_key(key); 590 buffer_put_string(&m, key, keylen); 591 memset(key, 0, keylen); 592 xfree(key); 593 594 ivlen = packet_get_keyiv_len(MODE_OUT); 595 packet_get_keyiv(MODE_OUT, iv, ivlen); 596 buffer_put_string(&m, iv, ivlen); 597 ivlen = packet_get_keyiv_len(MODE_OUT); 598 packet_get_keyiv(MODE_IN, iv, ivlen); 599 buffer_put_string(&m, iv, ivlen); 600 goto skip; 601 } else { 602 /* Kex for rekeying */ 603 mm_send_kex(&m, *monitor->m_pkex); 604 } 605 606 debug3("%s: Sending new keys: %p %p", 607 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); 608 609 /* Keys from Kex */ 610 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) 611 fatal("%s: conversion of newkeys failed", __func__); 612 613 buffer_put_string(&m, blob, bloblen); 614 xfree(blob); 615 616 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) 617 fatal("%s: conversion of newkeys failed", __func__); 618 619 buffer_put_string(&m, blob, bloblen); 620 xfree(blob); 621 622 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); 623 buffer_put_int(&m, seqnr); 624 buffer_put_int64(&m, blocks); 625 buffer_put_int(&m, packets); 626 buffer_put_int64(&m, bytes); 627 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); 628 buffer_put_int(&m, seqnr); 629 buffer_put_int64(&m, blocks); 630 buffer_put_int(&m, packets); 631 buffer_put_int64(&m, bytes); 632 633 debug3("%s: New keys have been sent", __func__); 634 skip: 635 /* More key context */ 636 plen = packet_get_keycontext(MODE_OUT, NULL); 637 p = xmalloc(plen+1); 638 packet_get_keycontext(MODE_OUT, p); 639 buffer_put_string(&m, p, plen); 640 xfree(p); 641 642 plen = packet_get_keycontext(MODE_IN, NULL); 643 p = xmalloc(plen+1); 644 packet_get_keycontext(MODE_IN, p); 645 buffer_put_string(&m, p, plen); 646 xfree(p); 647 648 /* Compression state */ 649 debug3("%s: Sending compression state", __func__); 650 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); 651 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); 652 653 /* Network I/O buffers */ 654 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); 655 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); 656 657 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); 658 debug3("%s: Finished sending state", __func__); 659 660 buffer_free(&m); 661 } 662 663 int 664 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 665 { 666 Buffer m; 667 char *p, *msg; 668 int success = 0, tmp1 = -1, tmp2 = -1; 669 670 /* Kludge: ensure there are fds free to receive the pty/tty */ 671 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 672 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 673 error("%s: cannot allocate fds for pty", __func__); 674 if (tmp1 > 0) 675 close(tmp1); 676 if (tmp2 > 0) 677 close(tmp2); 678 return 0; 679 } 680 close(tmp1); 681 close(tmp2); 682 683 buffer_init(&m); 684 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 685 686 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 687 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 688 689 success = buffer_get_int(&m); 690 if (success == 0) { 691 debug3("%s: pty alloc failed", __func__); 692 buffer_free(&m); 693 return (0); 694 } 695 p = buffer_get_string(&m, NULL); 696 msg = buffer_get_string(&m, NULL); 697 buffer_free(&m); 698 699 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 700 xfree(p); 701 702 buffer_append(&loginmsg, msg, strlen(msg)); 703 xfree(msg); 704 705 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 706 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 707 fatal("%s: receive fds failed", __func__); 708 709 /* Success */ 710 return (1); 711 } 712 713 void 714 mm_session_pty_cleanup2(Session *s) 715 { 716 Buffer m; 717 718 if (s->ttyfd == -1) 719 return; 720 buffer_init(&m); 721 buffer_put_cstring(&m, s->tty); 722 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 723 buffer_free(&m); 724 725 /* closed dup'ed master */ 726 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 727 error("close(s->ptymaster/%d): %s", 728 s->ptymaster, strerror(errno)); 729 730 /* unlink pty from session */ 731 s->ttyfd = -1; 732 } 733 734 #ifdef USE_PAM 735 void 736 mm_start_pam(Authctxt *authctxt) 737 { 738 Buffer m; 739 740 debug3("%s entering", __func__); 741 if (!options.use_pam) 742 fatal("UsePAM=no, but ended up in %s anyway", __func__); 743 744 buffer_init(&m); 745 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); 746 747 buffer_free(&m); 748 } 749 750 u_int 751 mm_do_pam_account(void) 752 { 753 Buffer m; 754 u_int ret; 755 char *msg; 756 757 debug3("%s entering", __func__); 758 if (!options.use_pam) 759 fatal("UsePAM=no, but ended up in %s anyway", __func__); 760 761 buffer_init(&m); 762 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); 763 764 mm_request_receive_expect(pmonitor->m_recvfd, 765 MONITOR_ANS_PAM_ACCOUNT, &m); 766 ret = buffer_get_int(&m); 767 msg = buffer_get_string(&m, NULL); 768 buffer_append(&loginmsg, msg, strlen(msg)); 769 xfree(msg); 770 771 buffer_free(&m); 772 773 debug3("%s returning %d", __func__, ret); 774 775 return (ret); 776 } 777 778 void * 779 mm_sshpam_init_ctx(Authctxt *authctxt) 780 { 781 Buffer m; 782 int success; 783 784 debug3("%s", __func__); 785 buffer_init(&m); 786 buffer_put_cstring(&m, authctxt->user); 787 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); 788 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); 789 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); 790 success = buffer_get_int(&m); 791 if (success == 0) { 792 debug3("%s: pam_init_ctx failed", __func__); 793 buffer_free(&m); 794 return (NULL); 795 } 796 buffer_free(&m); 797 return (authctxt); 798 } 799 800 int 801 mm_sshpam_query(void *ctx, char **name, char **info, 802 u_int *num, char ***prompts, u_int **echo_on) 803 { 804 Buffer m; 805 u_int i; 806 int ret; 807 808 debug3("%s", __func__); 809 buffer_init(&m); 810 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); 811 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); 812 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); 813 ret = buffer_get_int(&m); 814 debug3("%s: pam_query returned %d", __func__, ret); 815 *name = buffer_get_string(&m, NULL); 816 *info = buffer_get_string(&m, NULL); 817 *num = buffer_get_int(&m); 818 if (*num > PAM_MAX_NUM_MSG) 819 fatal("%s: received %u PAM messages, expected <= %u", 820 __func__, *num, PAM_MAX_NUM_MSG); 821 *prompts = xcalloc((*num + 1), sizeof(char *)); 822 *echo_on = xcalloc((*num + 1), sizeof(u_int)); 823 for (i = 0; i < *num; ++i) { 824 (*prompts)[i] = buffer_get_string(&m, NULL); 825 (*echo_on)[i] = buffer_get_int(&m); 826 } 827 buffer_free(&m); 828 return (ret); 829 } 830 831 int 832 mm_sshpam_respond(void *ctx, u_int num, char **resp) 833 { 834 Buffer m; 835 u_int i; 836 int ret; 837 838 debug3("%s", __func__); 839 buffer_init(&m); 840 buffer_put_int(&m, num); 841 for (i = 0; i < num; ++i) 842 buffer_put_cstring(&m, resp[i]); 843 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); 844 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); 845 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); 846 ret = buffer_get_int(&m); 847 debug3("%s: pam_respond returned %d", __func__, ret); 848 buffer_free(&m); 849 return (ret); 850 } 851 852 void 853 mm_sshpam_free_ctx(void *ctxtp) 854 { 855 Buffer m; 856 857 debug3("%s", __func__); 858 buffer_init(&m); 859 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); 860 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); 861 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); 862 buffer_free(&m); 863 } 864 #endif /* USE_PAM */ 865 866 /* Request process termination */ 867 868 void 869 mm_terminate(void) 870 { 871 Buffer m; 872 873 buffer_init(&m); 874 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 875 buffer_free(&m); 876 } 877 878 int 879 mm_ssh1_session_key(BIGNUM *num) 880 { 881 int rsafail; 882 Buffer m; 883 884 buffer_init(&m); 885 buffer_put_bignum2(&m, num); 886 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); 887 888 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); 889 890 rsafail = buffer_get_int(&m); 891 buffer_get_bignum2(&m, num); 892 893 buffer_free(&m); 894 895 return (rsafail); 896 } 897 898 #if defined(BSD_AUTH) || defined(SKEY) 899 static void 900 mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 901 char ***prompts, u_int **echo_on) 902 { 903 *name = xstrdup(""); 904 *infotxt = xstrdup(""); 905 *numprompts = 1; 906 *prompts = xcalloc(*numprompts, sizeof(char *)); 907 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 908 (*echo_on)[0] = 0; 909 } 910 #endif 911 912 #ifdef BSD_AUTH 913 int 914 mm_bsdauth_query(void *ctx, char **name, char **infotxt, 915 u_int *numprompts, char ***prompts, u_int **echo_on) 916 { 917 Buffer m; 918 u_int success; 919 char *challenge; 920 921 debug3("%s: entering", __func__); 922 923 buffer_init(&m); 924 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 925 926 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 927 &m); 928 success = buffer_get_int(&m); 929 if (success == 0) { 930 debug3("%s: no challenge", __func__); 931 buffer_free(&m); 932 return (-1); 933 } 934 935 /* Get the challenge, and format the response */ 936 challenge = buffer_get_string(&m, NULL); 937 buffer_free(&m); 938 939 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 940 (*prompts)[0] = challenge; 941 942 debug3("%s: received challenge: %s", __func__, challenge); 943 944 return (0); 945 } 946 947 int 948 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 949 { 950 Buffer m; 951 int authok; 952 953 debug3("%s: entering", __func__); 954 if (numresponses != 1) 955 return (-1); 956 957 buffer_init(&m); 958 buffer_put_cstring(&m, responses[0]); 959 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 960 961 mm_request_receive_expect(pmonitor->m_recvfd, 962 MONITOR_ANS_BSDAUTHRESPOND, &m); 963 964 authok = buffer_get_int(&m); 965 buffer_free(&m); 966 967 return ((authok == 0) ? -1 : 0); 968 } 969 #endif 970 971 #ifdef SKEY 972 int 973 mm_skey_query(void *ctx, char **name, char **infotxt, 974 u_int *numprompts, char ***prompts, u_int **echo_on) 975 { 976 Buffer m; 977 u_int success; 978 char *challenge; 979 980 debug3("%s: entering", __func__); 981 982 buffer_init(&m); 983 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); 984 985 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, 986 &m); 987 success = buffer_get_int(&m); 988 if (success == 0) { 989 debug3("%s: no challenge", __func__); 990 buffer_free(&m); 991 return (-1); 992 } 993 994 /* Get the challenge, and format the response */ 995 challenge = buffer_get_string(&m, NULL); 996 buffer_free(&m); 997 998 debug3("%s: received challenge: %s", __func__, challenge); 999 1000 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 1001 1002 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); 1003 xfree(challenge); 1004 1005 return (0); 1006 } 1007 1008 int 1009 mm_skey_respond(void *ctx, u_int numresponses, char **responses) 1010 { 1011 Buffer m; 1012 int authok; 1013 1014 debug3("%s: entering", __func__); 1015 if (numresponses != 1) 1016 return (-1); 1017 1018 buffer_init(&m); 1019 buffer_put_cstring(&m, responses[0]); 1020 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); 1021 1022 mm_request_receive_expect(pmonitor->m_recvfd, 1023 MONITOR_ANS_SKEYRESPOND, &m); 1024 1025 authok = buffer_get_int(&m); 1026 buffer_free(&m); 1027 1028 return ((authok == 0) ? -1 : 0); 1029 } 1030 #endif /* SKEY */ 1031 1032 void 1033 mm_ssh1_session_id(u_char session_id[16]) 1034 { 1035 Buffer m; 1036 int i; 1037 1038 debug3("%s entering", __func__); 1039 1040 buffer_init(&m); 1041 for (i = 0; i < 16; i++) 1042 buffer_put_char(&m, session_id[i]); 1043 1044 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); 1045 buffer_free(&m); 1046 } 1047 1048 int 1049 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) 1050 { 1051 Buffer m; 1052 Key *key; 1053 u_char *blob; 1054 u_int blen; 1055 int allowed = 0, have_forced = 0; 1056 1057 debug3("%s entering", __func__); 1058 1059 buffer_init(&m); 1060 buffer_put_bignum2(&m, client_n); 1061 1062 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); 1063 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); 1064 1065 allowed = buffer_get_int(&m); 1066 1067 /* fake forced command */ 1068 auth_clear_options(); 1069 have_forced = buffer_get_int(&m); 1070 forced_command = have_forced ? xstrdup("true") : NULL; 1071 1072 if (allowed && rkey != NULL) { 1073 blob = buffer_get_string(&m, &blen); 1074 if ((key = key_from_blob(blob, blen)) == NULL) 1075 fatal("%s: key_from_blob failed", __func__); 1076 *rkey = key; 1077 xfree(blob); 1078 } 1079 mm_send_debug(&m); 1080 buffer_free(&m); 1081 1082 return (allowed); 1083 } 1084 1085 BIGNUM * 1086 mm_auth_rsa_generate_challenge(Key *key) 1087 { 1088 Buffer m; 1089 BIGNUM *challenge; 1090 u_char *blob; 1091 u_int blen; 1092 1093 debug3("%s entering", __func__); 1094 1095 if ((challenge = BN_new()) == NULL) 1096 fatal("%s: BN_new failed", __func__); 1097 1098 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1099 if (key_to_blob(key, &blob, &blen) == 0) 1100 fatal("%s: key_to_blob failed", __func__); 1101 key->type = KEY_RSA1; 1102 1103 buffer_init(&m); 1104 buffer_put_string(&m, blob, blen); 1105 xfree(blob); 1106 1107 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); 1108 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); 1109 1110 buffer_get_bignum2(&m, challenge); 1111 buffer_free(&m); 1112 1113 return (challenge); 1114 } 1115 1116 int 1117 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) 1118 { 1119 Buffer m; 1120 u_char *blob; 1121 u_int blen; 1122 int success = 0; 1123 1124 debug3("%s entering", __func__); 1125 1126 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1127 if (key_to_blob(key, &blob, &blen) == 0) 1128 fatal("%s: key_to_blob failed", __func__); 1129 key->type = KEY_RSA1; 1130 1131 buffer_init(&m); 1132 buffer_put_string(&m, blob, blen); 1133 buffer_put_string(&m, response, 16); 1134 xfree(blob); 1135 1136 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); 1137 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); 1138 1139 success = buffer_get_int(&m); 1140 buffer_free(&m); 1141 1142 return (success); 1143 } 1144 1145 #ifdef GSSAPI 1146 OM_uint32 1147 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 1148 { 1149 Buffer m; 1150 OM_uint32 major; 1151 1152 /* Client doesn't get to see the context */ 1153 *ctx = NULL; 1154 1155 buffer_init(&m); 1156 buffer_put_string(&m, goid->elements, goid->length); 1157 1158 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 1159 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 1160 1161 major = buffer_get_int(&m); 1162 1163 buffer_free(&m); 1164 return (major); 1165 } 1166 1167 OM_uint32 1168 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 1169 gss_buffer_desc *out, OM_uint32 *flags) 1170 { 1171 Buffer m; 1172 OM_uint32 major; 1173 u_int len; 1174 1175 buffer_init(&m); 1176 buffer_put_string(&m, in->value, in->length); 1177 1178 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 1179 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 1180 1181 major = buffer_get_int(&m); 1182 out->value = buffer_get_string(&m, &len); 1183 out->length = len; 1184 if (flags) 1185 *flags = buffer_get_int(&m); 1186 1187 buffer_free(&m); 1188 1189 return (major); 1190 } 1191 1192 OM_uint32 1193 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 1194 { 1195 Buffer m; 1196 OM_uint32 major; 1197 1198 buffer_init(&m); 1199 buffer_put_string(&m, gssbuf->value, gssbuf->length); 1200 buffer_put_string(&m, gssmic->value, gssmic->length); 1201 1202 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 1203 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 1204 &m); 1205 1206 major = buffer_get_int(&m); 1207 buffer_free(&m); 1208 return(major); 1209 } 1210 1211 int 1212 mm_ssh_gssapi_userok(char *user) 1213 { 1214 Buffer m; 1215 int authenticated = 0; 1216 1217 buffer_init(&m); 1218 1219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 1220 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 1221 &m); 1222 1223 authenticated = buffer_get_int(&m); 1224 1225 buffer_free(&m); 1226 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 1227 return (authenticated); 1228 } 1229 #endif /* GSSAPI */ 1230 1231 #ifdef JPAKE 1232 void 1233 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, 1234 char **hash_scheme, char **salt) 1235 { 1236 Buffer m; 1237 1238 debug3("%s entering", __func__); 1239 1240 buffer_init(&m); 1241 mm_request_send(pmonitor->m_recvfd, 1242 MONITOR_REQ_JPAKE_GET_PWDATA, &m); 1243 1244 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); 1245 mm_request_receive_expect(pmonitor->m_recvfd, 1246 MONITOR_ANS_JPAKE_GET_PWDATA, &m); 1247 1248 *hash_scheme = buffer_get_string(&m, NULL); 1249 *salt = buffer_get_string(&m, NULL); 1250 1251 buffer_free(&m); 1252 } 1253 1254 void 1255 mm_jpake_step1(struct jpake_group *grp, 1256 u_char **id, u_int *id_len, 1257 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, 1258 u_char **priv1_proof, u_int *priv1_proof_len, 1259 u_char **priv2_proof, u_int *priv2_proof_len) 1260 { 1261 Buffer m; 1262 1263 debug3("%s entering", __func__); 1264 1265 buffer_init(&m); 1266 mm_request_send(pmonitor->m_recvfd, 1267 MONITOR_REQ_JPAKE_STEP1, &m); 1268 1269 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); 1270 mm_request_receive_expect(pmonitor->m_recvfd, 1271 MONITOR_ANS_JPAKE_STEP1, &m); 1272 1273 if ((*priv1 = BN_new()) == NULL || 1274 (*priv2 = BN_new()) == NULL || 1275 (*g_priv1 = BN_new()) == NULL || 1276 (*g_priv2 = BN_new()) == NULL) 1277 fatal("%s: BN_new", __func__); 1278 1279 *id = buffer_get_string(&m, id_len); 1280 /* priv1 and priv2 are, well, private */ 1281 buffer_get_bignum2(&m, *g_priv1); 1282 buffer_get_bignum2(&m, *g_priv2); 1283 *priv1_proof = buffer_get_string(&m, priv1_proof_len); 1284 *priv2_proof = buffer_get_string(&m, priv2_proof_len); 1285 1286 buffer_free(&m); 1287 } 1288 1289 void 1290 mm_jpake_step2(struct jpake_group *grp, BIGNUM *s, 1291 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, 1292 const u_char *theirid, u_int theirid_len, 1293 const u_char *myid, u_int myid_len, 1294 const u_char *theirpub1_proof, u_int theirpub1_proof_len, 1295 const u_char *theirpub2_proof, u_int theirpub2_proof_len, 1296 BIGNUM **newpub, 1297 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) 1298 { 1299 Buffer m; 1300 1301 debug3("%s entering", __func__); 1302 1303 buffer_init(&m); 1304 /* monitor already has all bignums except theirpub1, theirpub2 */ 1305 buffer_put_bignum2(&m, theirpub1); 1306 buffer_put_bignum2(&m, theirpub2); 1307 /* monitor already knows our id */ 1308 buffer_put_string(&m, theirid, theirid_len); 1309 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); 1310 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); 1311 1312 mm_request_send(pmonitor->m_recvfd, 1313 MONITOR_REQ_JPAKE_STEP2, &m); 1314 1315 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); 1316 mm_request_receive_expect(pmonitor->m_recvfd, 1317 MONITOR_ANS_JPAKE_STEP2, &m); 1318 1319 if ((*newpub = BN_new()) == NULL) 1320 fatal("%s: BN_new", __func__); 1321 1322 buffer_get_bignum2(&m, *newpub); 1323 *newpub_exponent_proof = buffer_get_string(&m, 1324 newpub_exponent_proof_len); 1325 1326 buffer_free(&m); 1327 } 1328 1329 void 1330 mm_jpake_key_confirm(struct jpake_group *grp, BIGNUM *s, BIGNUM *step2_val, 1331 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, 1332 BIGNUM *theirpub1, BIGNUM *theirpub2, 1333 const u_char *my_id, u_int my_id_len, 1334 const u_char *their_id, u_int their_id_len, 1335 const u_char *sess_id, u_int sess_id_len, 1336 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, 1337 BIGNUM **k, 1338 u_char **confirm_hash, u_int *confirm_hash_len) 1339 { 1340 Buffer m; 1341 1342 debug3("%s entering", __func__); 1343 1344 buffer_init(&m); 1345 /* monitor already has all bignums except step2_val */ 1346 buffer_put_bignum2(&m, step2_val); 1347 /* monitor already knows all the ids */ 1348 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); 1349 1350 mm_request_send(pmonitor->m_recvfd, 1351 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); 1352 1353 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); 1354 mm_request_receive_expect(pmonitor->m_recvfd, 1355 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); 1356 1357 /* 'k' is sensitive and stays in the monitor */ 1358 *confirm_hash = buffer_get_string(&m, confirm_hash_len); 1359 1360 buffer_free(&m); 1361 } 1362 1363 int 1364 mm_jpake_check_confirm(const BIGNUM *k, 1365 const u_char *peer_id, u_int peer_id_len, 1366 const u_char *sess_id, u_int sess_id_len, 1367 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) 1368 { 1369 Buffer m; 1370 int success = 0; 1371 1372 debug3("%s entering", __func__); 1373 1374 buffer_init(&m); 1375 /* k is dummy in slave, ignored */ 1376 /* monitor knows all the ids */ 1377 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); 1378 mm_request_send(pmonitor->m_recvfd, 1379 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); 1380 1381 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); 1382 mm_request_receive_expect(pmonitor->m_recvfd, 1383 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); 1384 1385 success = buffer_get_int(&m); 1386 buffer_free(&m); 1387 1388 debug3("%s: success = %d", __func__, success); 1389 return success; 1390 } 1391 #endif /* JPAKE */ 1392 1393 #ifdef KRB4 1394 int 1395 mm_auth_krb4(Authctxt *authctxt, void *_auth, char **client, void *_reply) 1396 { 1397 KTEXT auth, reply; 1398 Buffer m; 1399 u_int rlen; 1400 int success = 0; 1401 char *p; 1402 1403 debug3("%s entering", __func__); 1404 auth = _auth; 1405 reply = _reply; 1406 1407 buffer_init(&m); 1408 buffer_put_string(&m, auth->dat, auth->length); 1409 1410 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB4, &m); 1411 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB4, &m); 1412 1413 success = buffer_get_int(&m); 1414 if (success) { 1415 *client = buffer_get_string(&m, NULL); 1416 p = buffer_get_string(&m, &rlen); 1417 if (rlen >= MAX_KTXT_LEN) 1418 fatal("%s: reply from monitor too large", __func__); 1419 reply->length = rlen; 1420 memcpy(reply->dat, p, rlen); 1421 memset(p, 0, rlen); 1422 xfree(p); 1423 } 1424 buffer_free(&m); 1425 return (success); 1426 } 1427 #endif 1428 1429 #ifdef KRB5 1430 int 1431 mm_auth_krb5(void *ctx, void *argp, char **userp, void *resp) 1432 { 1433 krb5_data *tkt, *reply; 1434 Buffer m; 1435 int success; 1436 1437 debug3("%s entering", __func__); 1438 tkt = (krb5_data *) argp; 1439 reply = (krb5_data *) resp; 1440 1441 buffer_init(&m); 1442 buffer_put_string(&m, tkt->data, tkt->length); 1443 1444 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB5, &m); 1445 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB5, &m); 1446 1447 success = buffer_get_int(&m); 1448 if (success) { 1449 u_int len; 1450 1451 *userp = buffer_get_string(&m, NULL); 1452 reply->data = buffer_get_string(&m, &len); 1453 reply->length = len; 1454 } else { 1455 memset(reply, 0, sizeof(*reply)); 1456 *userp = NULL; 1457 } 1458 1459 buffer_free(&m); 1460 return (success); 1461 } 1462 #endif 1463