1 /* $OpenBSD: monitor_wrap.c,v 1.70 2010/08/31 11:54:45 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 "includes.h" 29 30 #include <sys/types.h> 31 #include <sys/uio.h> 32 33 #include <errno.h> 34 #include <pwd.h> 35 #include <signal.h> 36 #include <stdarg.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 #include <openssl/bn.h> 42 #include <openssl/dh.h> 43 #include <openssl/evp.h> 44 45 #include "openbsd-compat/sys-queue.h" 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 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ 60 #undef TARGET_OS_MAC 61 #include "zlib.h" 62 #define TARGET_OS_MAC 1 63 #else 64 #include "zlib.h" 65 #endif 66 #include "monitor.h" 67 #ifdef GSSAPI 68 #include "ssh-gss.h" 69 #endif 70 #include "monitor_wrap.h" 71 #include "atomicio.h" 72 #include "monitor_fdpass.h" 73 #include "misc.h" 74 #include "schnorr.h" 75 #include "jpake.h" 76 #include "uuencode.h" 77 78 #include "channels.h" 79 #include "session.h" 80 #include "servconf.h" 81 #include "roaming.h" 82 83 /* Imports */ 84 extern int compat20; 85 extern z_stream incoming_stream; 86 extern z_stream outgoing_stream; 87 extern struct monitor *pmonitor; 88 extern Buffer loginmsg; 89 extern ServerOptions options; 90 91 int 92 mm_is_monitor(void) 93 { 94 /* 95 * m_pid is only set in the privileged part, and 96 * points to the unprivileged child. 97 */ 98 return (pmonitor && pmonitor->m_pid > 0); 99 } 100 101 void 102 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) 103 { 104 u_int mlen = buffer_len(m); 105 u_char buf[5]; 106 107 debug3("%s entering: type %d", __func__, type); 108 109 put_u32(buf, mlen + 1); 110 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ 111 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) 112 fatal("%s: write: %s", __func__, strerror(errno)); 113 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) 114 fatal("%s: write: %s", __func__, strerror(errno)); 115 } 116 117 void 118 mm_request_receive(int sock, Buffer *m) 119 { 120 u_char buf[4]; 121 u_int msg_len; 122 123 debug3("%s entering", __func__); 124 125 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { 126 if (errno == EPIPE) 127 cleanup_exit(255); 128 fatal("%s: read: %s", __func__, strerror(errno)); 129 } 130 msg_len = get_u32(buf); 131 if (msg_len > 256 * 1024) 132 fatal("%s: read: bad msg_len %d", __func__, msg_len); 133 buffer_clear(m); 134 buffer_append_space(m, msg_len); 135 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) 136 fatal("%s: read: %s", __func__, strerror(errno)); 137 } 138 139 void 140 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) 141 { 142 u_char rtype; 143 144 debug3("%s entering: type %d", __func__, type); 145 146 mm_request_receive(sock, m); 147 rtype = buffer_get_char(m); 148 if (rtype != type) 149 fatal("%s: read: rtype %d != type %d", __func__, 150 rtype, type); 151 } 152 153 DH * 154 mm_choose_dh(int min, int nbits, int max) 155 { 156 BIGNUM *p, *g; 157 int success = 0; 158 Buffer m; 159 160 buffer_init(&m); 161 buffer_put_int(&m, min); 162 buffer_put_int(&m, nbits); 163 buffer_put_int(&m, max); 164 165 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); 166 167 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); 168 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); 169 170 success = buffer_get_char(&m); 171 if (success == 0) 172 fatal("%s: MONITOR_ANS_MODULI failed", __func__); 173 174 if ((p = BN_new()) == NULL) 175 fatal("%s: BN_new failed", __func__); 176 if ((g = BN_new()) == NULL) 177 fatal("%s: BN_new failed", __func__); 178 buffer_get_bignum2(&m, p); 179 buffer_get_bignum2(&m, g); 180 181 debug3("%s: remaining %d", __func__, buffer_len(&m)); 182 buffer_free(&m); 183 184 return (dh_new_group(g, p)); 185 } 186 187 int 188 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) 189 { 190 Kex *kex = *pmonitor->m_pkex; 191 Buffer m; 192 193 debug3("%s entering", __func__); 194 195 buffer_init(&m); 196 buffer_put_int(&m, kex->host_key_index(key)); 197 buffer_put_string(&m, data, datalen); 198 199 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); 200 201 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); 202 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); 203 *sigp = buffer_get_string(&m, lenp); 204 buffer_free(&m); 205 206 return (0); 207 } 208 209 struct passwd * 210 mm_getpwnamallow(const char *username) 211 { 212 Buffer m; 213 struct passwd *pw; 214 u_int len; 215 ServerOptions *newopts; 216 217 debug3("%s entering", __func__); 218 219 buffer_init(&m); 220 buffer_put_cstring(&m, username); 221 222 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); 223 224 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); 225 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); 226 227 if (buffer_get_char(&m) == 0) { 228 pw = NULL; 229 goto out; 230 } 231 pw = buffer_get_string(&m, &len); 232 if (len != sizeof(struct passwd)) 233 fatal("%s: struct passwd size mismatch", __func__); 234 pw->pw_name = buffer_get_string(&m, NULL); 235 pw->pw_passwd = buffer_get_string(&m, NULL); 236 pw->pw_gecos = buffer_get_string(&m, NULL); 237 #ifdef HAVE_PW_CLASS_IN_PASSWD 238 pw->pw_class = buffer_get_string(&m, NULL); 239 #endif 240 pw->pw_dir = buffer_get_string(&m, NULL); 241 pw->pw_shell = buffer_get_string(&m, NULL); 242 243 out: 244 /* copy options block as a Match directive may have changed some */ 245 newopts = buffer_get_string(&m, &len); 246 if (len != sizeof(*newopts)) 247 fatal("%s: option block size mismatch", __func__); 248 if (newopts->banner != NULL) 249 newopts->banner = buffer_get_string(&m, NULL); 250 copy_set_server_options(&options, newopts, 1); 251 xfree(newopts); 252 253 buffer_free(&m); 254 255 return (pw); 256 } 257 258 char * 259 mm_auth2_read_banner(void) 260 { 261 Buffer m; 262 char *banner; 263 264 debug3("%s entering", __func__); 265 266 buffer_init(&m); 267 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 268 buffer_clear(&m); 269 270 mm_request_receive_expect(pmonitor->m_recvfd, 271 MONITOR_ANS_AUTH2_READ_BANNER, &m); 272 banner = buffer_get_string(&m, NULL); 273 buffer_free(&m); 274 275 /* treat empty banner as missing banner */ 276 if (strlen(banner) == 0) { 277 xfree(banner); 278 banner = NULL; 279 } 280 return (banner); 281 } 282 283 /* Inform the privileged process about service and style */ 284 285 void 286 mm_inform_authserv(char *service, char *style) 287 { 288 Buffer m; 289 290 debug3("%s entering", __func__); 291 292 buffer_init(&m); 293 buffer_put_cstring(&m, service); 294 buffer_put_cstring(&m, style ? style : ""); 295 296 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 297 298 buffer_free(&m); 299 } 300 301 /* Do the password authentication */ 302 int 303 mm_auth_password(Authctxt *authctxt, char *password) 304 { 305 Buffer m; 306 int authenticated = 0; 307 308 debug3("%s entering", __func__); 309 310 buffer_init(&m); 311 buffer_put_cstring(&m, password); 312 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 313 314 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 315 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 316 317 authenticated = buffer_get_int(&m); 318 319 buffer_free(&m); 320 321 debug3("%s: user %sauthenticated", 322 __func__, authenticated ? "" : "not "); 323 return (authenticated); 324 } 325 326 int 327 mm_user_key_allowed(struct passwd *pw, Key *key) 328 { 329 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); 330 } 331 332 int 333 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, 334 Key *key) 335 { 336 return (mm_key_allowed(MM_HOSTKEY, user, host, key)); 337 } 338 339 int 340 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, 341 char *host, Key *key) 342 { 343 int ret; 344 345 key->type = KEY_RSA; /* XXX hack for key_to_blob */ 346 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); 347 key->type = KEY_RSA1; 348 return (ret); 349 } 350 351 int 352 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) 353 { 354 Buffer m; 355 u_char *blob; 356 u_int len; 357 int allowed = 0, have_forced = 0; 358 359 debug3("%s entering", __func__); 360 361 /* Convert the key to a blob and the pass it over */ 362 if (!key_to_blob(key, &blob, &len)) 363 return (0); 364 365 buffer_init(&m); 366 buffer_put_int(&m, type); 367 buffer_put_cstring(&m, user ? user : ""); 368 buffer_put_cstring(&m, host ? host : ""); 369 buffer_put_string(&m, blob, len); 370 xfree(blob); 371 372 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 373 374 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 375 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 376 377 allowed = buffer_get_int(&m); 378 379 /* fake forced command */ 380 auth_clear_options(); 381 have_forced = buffer_get_int(&m); 382 forced_command = have_forced ? xstrdup("true") : NULL; 383 384 buffer_free(&m); 385 386 return (allowed); 387 } 388 389 /* 390 * This key verify needs to send the key type along, because the 391 * privileged parent makes the decision if the key is allowed 392 * for authentication. 393 */ 394 395 int 396 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) 397 { 398 Buffer m; 399 u_char *blob; 400 u_int len; 401 int verified = 0; 402 403 debug3("%s entering", __func__); 404 405 /* Convert the key to a blob and the pass it over */ 406 if (!key_to_blob(key, &blob, &len)) 407 return (0); 408 409 buffer_init(&m); 410 buffer_put_string(&m, blob, len); 411 buffer_put_string(&m, sig, siglen); 412 buffer_put_string(&m, data, datalen); 413 xfree(blob); 414 415 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 416 417 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 418 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 419 420 verified = buffer_get_int(&m); 421 422 buffer_free(&m); 423 424 return (verified); 425 } 426 427 /* Export key state after authentication */ 428 Newkeys * 429 mm_newkeys_from_blob(u_char *blob, int blen) 430 { 431 Buffer b; 432 u_int len; 433 Newkeys *newkey = NULL; 434 Enc *enc; 435 Mac *mac; 436 Comp *comp; 437 438 debug3("%s: %p(%d)", __func__, blob, blen); 439 #ifdef DEBUG_PK 440 dump_base64(stderr, blob, blen); 441 #endif 442 buffer_init(&b); 443 buffer_append(&b, blob, blen); 444 445 newkey = xmalloc(sizeof(*newkey)); 446 enc = &newkey->enc; 447 mac = &newkey->mac; 448 comp = &newkey->comp; 449 450 /* Enc structure */ 451 enc->name = buffer_get_string(&b, NULL); 452 buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); 453 enc->enabled = buffer_get_int(&b); 454 enc->block_size = buffer_get_int(&b); 455 enc->key = buffer_get_string(&b, &enc->key_len); 456 enc->iv = buffer_get_string(&b, &len); 457 if (len != enc->block_size) 458 fatal("%s: bad ivlen: expected %u != %u", __func__, 459 enc->block_size, len); 460 461 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) 462 fatal("%s: bad cipher name %s or pointer %p", __func__, 463 enc->name, enc->cipher); 464 465 /* Mac structure */ 466 mac->name = buffer_get_string(&b, NULL); 467 if (mac->name == NULL || mac_setup(mac, mac->name) == -1) 468 fatal("%s: can not setup mac %s", __func__, mac->name); 469 mac->enabled = buffer_get_int(&b); 470 mac->key = buffer_get_string(&b, &len); 471 if (len > mac->key_len) 472 fatal("%s: bad mac key length: %u > %d", __func__, len, 473 mac->key_len); 474 mac->key_len = len; 475 476 /* Comp structure */ 477 comp->type = buffer_get_int(&b); 478 comp->enabled = buffer_get_int(&b); 479 comp->name = buffer_get_string(&b, NULL); 480 481 len = buffer_len(&b); 482 if (len != 0) 483 error("newkeys_from_blob: remaining bytes in blob %u", len); 484 buffer_free(&b); 485 return (newkey); 486 } 487 488 int 489 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) 490 { 491 Buffer b; 492 int len; 493 Enc *enc; 494 Mac *mac; 495 Comp *comp; 496 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode); 497 498 debug3("%s: converting %p", __func__, newkey); 499 500 if (newkey == NULL) { 501 error("%s: newkey == NULL", __func__); 502 return 0; 503 } 504 enc = &newkey->enc; 505 mac = &newkey->mac; 506 comp = &newkey->comp; 507 508 buffer_init(&b); 509 /* Enc structure */ 510 buffer_put_cstring(&b, enc->name); 511 /* The cipher struct is constant and shared, you export pointer */ 512 buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); 513 buffer_put_int(&b, enc->enabled); 514 buffer_put_int(&b, enc->block_size); 515 buffer_put_string(&b, enc->key, enc->key_len); 516 packet_get_keyiv(mode, enc->iv, enc->block_size); 517 buffer_put_string(&b, enc->iv, enc->block_size); 518 519 /* Mac structure */ 520 buffer_put_cstring(&b, mac->name); 521 buffer_put_int(&b, mac->enabled); 522 buffer_put_string(&b, mac->key, mac->key_len); 523 524 /* Comp structure */ 525 buffer_put_int(&b, comp->type); 526 buffer_put_int(&b, comp->enabled); 527 buffer_put_cstring(&b, comp->name); 528 529 len = buffer_len(&b); 530 if (lenp != NULL) 531 *lenp = len; 532 if (blobp != NULL) { 533 *blobp = xmalloc(len); 534 memcpy(*blobp, buffer_ptr(&b), len); 535 } 536 memset(buffer_ptr(&b), 0, len); 537 buffer_free(&b); 538 return len; 539 } 540 541 static void 542 mm_send_kex(Buffer *m, Kex *kex) 543 { 544 buffer_put_string(m, kex->session_id, kex->session_id_len); 545 buffer_put_int(m, kex->we_need); 546 buffer_put_int(m, kex->hostkey_type); 547 buffer_put_int(m, kex->kex_type); 548 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); 549 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); 550 buffer_put_int(m, kex->flags); 551 buffer_put_cstring(m, kex->client_version_string); 552 buffer_put_cstring(m, kex->server_version_string); 553 } 554 555 void 556 mm_send_keystate(struct monitor *monitor) 557 { 558 Buffer m, *input, *output; 559 u_char *blob, *p; 560 u_int bloblen, plen; 561 u_int32_t seqnr, packets; 562 u_int64_t blocks, bytes; 563 564 buffer_init(&m); 565 566 if (!compat20) { 567 u_char iv[24]; 568 u_char *key; 569 u_int ivlen, keylen; 570 571 buffer_put_int(&m, packet_get_protocol_flags()); 572 573 buffer_put_int(&m, packet_get_ssh1_cipher()); 574 575 debug3("%s: Sending ssh1 KEY+IV", __func__); 576 keylen = packet_get_encryption_key(NULL); 577 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ 578 keylen = packet_get_encryption_key(key); 579 buffer_put_string(&m, key, keylen); 580 memset(key, 0, keylen); 581 xfree(key); 582 583 ivlen = packet_get_keyiv_len(MODE_OUT); 584 packet_get_keyiv(MODE_OUT, iv, ivlen); 585 buffer_put_string(&m, iv, ivlen); 586 ivlen = packet_get_keyiv_len(MODE_OUT); 587 packet_get_keyiv(MODE_IN, iv, ivlen); 588 buffer_put_string(&m, iv, ivlen); 589 goto skip; 590 } else { 591 /* Kex for rekeying */ 592 mm_send_kex(&m, *monitor->m_pkex); 593 } 594 595 debug3("%s: Sending new keys: %p %p", 596 __func__, packet_get_newkeys(MODE_OUT), 597 packet_get_newkeys(MODE_IN)); 598 599 /* Keys from Kex */ 600 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) 601 fatal("%s: conversion of newkeys failed", __func__); 602 603 buffer_put_string(&m, blob, bloblen); 604 xfree(blob); 605 606 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) 607 fatal("%s: conversion of newkeys failed", __func__); 608 609 buffer_put_string(&m, blob, bloblen); 610 xfree(blob); 611 612 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); 613 buffer_put_int(&m, seqnr); 614 buffer_put_int64(&m, blocks); 615 buffer_put_int(&m, packets); 616 buffer_put_int64(&m, bytes); 617 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); 618 buffer_put_int(&m, seqnr); 619 buffer_put_int64(&m, blocks); 620 buffer_put_int(&m, packets); 621 buffer_put_int64(&m, bytes); 622 623 debug3("%s: New keys have been sent", __func__); 624 skip: 625 /* More key context */ 626 plen = packet_get_keycontext(MODE_OUT, NULL); 627 p = xmalloc(plen+1); 628 packet_get_keycontext(MODE_OUT, p); 629 buffer_put_string(&m, p, plen); 630 xfree(p); 631 632 plen = packet_get_keycontext(MODE_IN, NULL); 633 p = xmalloc(plen+1); 634 packet_get_keycontext(MODE_IN, p); 635 buffer_put_string(&m, p, plen); 636 xfree(p); 637 638 /* Compression state */ 639 debug3("%s: Sending compression state", __func__); 640 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); 641 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); 642 643 /* Network I/O buffers */ 644 input = (Buffer *)packet_get_input(); 645 output = (Buffer *)packet_get_output(); 646 buffer_put_string(&m, buffer_ptr(input), buffer_len(input)); 647 buffer_put_string(&m, buffer_ptr(output), buffer_len(output)); 648 649 /* Roaming */ 650 if (compat20) { 651 buffer_put_int64(&m, get_sent_bytes()); 652 buffer_put_int64(&m, get_recv_bytes()); 653 } 654 655 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); 656 debug3("%s: Finished sending state", __func__); 657 658 buffer_free(&m); 659 } 660 661 int 662 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 663 { 664 Buffer m; 665 char *p, *msg; 666 int success = 0, tmp1 = -1, tmp2 = -1; 667 668 /* Kludge: ensure there are fds free to receive the pty/tty */ 669 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 670 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 671 error("%s: cannot allocate fds for pty", __func__); 672 if (tmp1 > 0) 673 close(tmp1); 674 if (tmp2 > 0) 675 close(tmp2); 676 return 0; 677 } 678 close(tmp1); 679 close(tmp2); 680 681 buffer_init(&m); 682 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 683 684 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 685 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 686 687 success = buffer_get_int(&m); 688 if (success == 0) { 689 debug3("%s: pty alloc failed", __func__); 690 buffer_free(&m); 691 return (0); 692 } 693 p = buffer_get_string(&m, NULL); 694 msg = buffer_get_string(&m, NULL); 695 buffer_free(&m); 696 697 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 698 xfree(p); 699 700 buffer_append(&loginmsg, msg, strlen(msg)); 701 xfree(msg); 702 703 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 704 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 705 fatal("%s: receive fds failed", __func__); 706 707 /* Success */ 708 return (1); 709 } 710 711 void 712 mm_session_pty_cleanup2(Session *s) 713 { 714 Buffer m; 715 716 if (s->ttyfd == -1) 717 return; 718 buffer_init(&m); 719 buffer_put_cstring(&m, s->tty); 720 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 721 buffer_free(&m); 722 723 /* closed dup'ed master */ 724 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 725 error("close(s->ptymaster/%d): %s", 726 s->ptymaster, strerror(errno)); 727 728 /* unlink pty from session */ 729 s->ttyfd = -1; 730 } 731 732 #ifdef USE_PAM 733 void 734 mm_start_pam(Authctxt *authctxt) 735 { 736 Buffer m; 737 738 debug3("%s entering", __func__); 739 if (!options.use_pam) 740 fatal("UsePAM=no, but ended up in %s anyway", __func__); 741 742 buffer_init(&m); 743 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); 744 745 buffer_free(&m); 746 } 747 748 u_int 749 mm_do_pam_account(void) 750 { 751 Buffer m; 752 u_int ret; 753 char *msg; 754 755 debug3("%s entering", __func__); 756 if (!options.use_pam) 757 fatal("UsePAM=no, but ended up in %s anyway", __func__); 758 759 buffer_init(&m); 760 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); 761 762 mm_request_receive_expect(pmonitor->m_recvfd, 763 MONITOR_ANS_PAM_ACCOUNT, &m); 764 ret = buffer_get_int(&m); 765 msg = buffer_get_string(&m, NULL); 766 buffer_append(&loginmsg, msg, strlen(msg)); 767 xfree(msg); 768 769 buffer_free(&m); 770 771 debug3("%s returning %d", __func__, ret); 772 773 return (ret); 774 } 775 776 void * 777 mm_sshpam_init_ctx(Authctxt *authctxt) 778 { 779 Buffer m; 780 int success; 781 782 debug3("%s", __func__); 783 buffer_init(&m); 784 buffer_put_cstring(&m, authctxt->user); 785 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); 786 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); 787 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); 788 success = buffer_get_int(&m); 789 if (success == 0) { 790 debug3("%s: pam_init_ctx failed", __func__); 791 buffer_free(&m); 792 return (NULL); 793 } 794 buffer_free(&m); 795 return (authctxt); 796 } 797 798 int 799 mm_sshpam_query(void *ctx, char **name, char **info, 800 u_int *num, char ***prompts, u_int **echo_on) 801 { 802 Buffer m; 803 u_int i; 804 int ret; 805 806 debug3("%s", __func__); 807 buffer_init(&m); 808 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); 809 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); 810 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); 811 ret = buffer_get_int(&m); 812 debug3("%s: pam_query returned %d", __func__, ret); 813 *name = buffer_get_string(&m, NULL); 814 *info = buffer_get_string(&m, NULL); 815 *num = buffer_get_int(&m); 816 if (*num > PAM_MAX_NUM_MSG) 817 fatal("%s: recieved %u PAM messages, expected <= %u", 818 __func__, *num, PAM_MAX_NUM_MSG); 819 *prompts = xcalloc((*num + 1), sizeof(char *)); 820 *echo_on = xcalloc((*num + 1), sizeof(u_int)); 821 for (i = 0; i < *num; ++i) { 822 (*prompts)[i] = buffer_get_string(&m, NULL); 823 (*echo_on)[i] = buffer_get_int(&m); 824 } 825 buffer_free(&m); 826 return (ret); 827 } 828 829 int 830 mm_sshpam_respond(void *ctx, u_int num, char **resp) 831 { 832 Buffer m; 833 u_int i; 834 int ret; 835 836 debug3("%s", __func__); 837 buffer_init(&m); 838 buffer_put_int(&m, num); 839 for (i = 0; i < num; ++i) 840 buffer_put_cstring(&m, resp[i]); 841 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); 842 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); 843 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); 844 ret = buffer_get_int(&m); 845 debug3("%s: pam_respond returned %d", __func__, ret); 846 buffer_free(&m); 847 return (ret); 848 } 849 850 void 851 mm_sshpam_free_ctx(void *ctxtp) 852 { 853 Buffer m; 854 855 debug3("%s", __func__); 856 buffer_init(&m); 857 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); 858 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); 859 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); 860 buffer_free(&m); 861 } 862 #endif /* USE_PAM */ 863 864 /* Request process termination */ 865 866 void 867 mm_terminate(void) 868 { 869 Buffer m; 870 871 buffer_init(&m); 872 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 873 buffer_free(&m); 874 } 875 876 int 877 mm_ssh1_session_key(BIGNUM *num) 878 { 879 int rsafail; 880 Buffer m; 881 882 buffer_init(&m); 883 buffer_put_bignum2(&m, num); 884 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); 885 886 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); 887 888 rsafail = buffer_get_int(&m); 889 buffer_get_bignum2(&m, num); 890 891 buffer_free(&m); 892 893 return (rsafail); 894 } 895 896 static void 897 mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 898 char ***prompts, u_int **echo_on) 899 { 900 *name = xstrdup(""); 901 *infotxt = xstrdup(""); 902 *numprompts = 1; 903 *prompts = xcalloc(*numprompts, sizeof(char *)); 904 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 905 (*echo_on)[0] = 0; 906 } 907 908 int 909 mm_bsdauth_query(void *ctx, char **name, char **infotxt, 910 u_int *numprompts, char ***prompts, u_int **echo_on) 911 { 912 Buffer m; 913 u_int success; 914 char *challenge; 915 916 debug3("%s: entering", __func__); 917 918 buffer_init(&m); 919 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 920 921 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 922 &m); 923 success = buffer_get_int(&m); 924 if (success == 0) { 925 debug3("%s: no challenge", __func__); 926 buffer_free(&m); 927 return (-1); 928 } 929 930 /* Get the challenge, and format the response */ 931 challenge = buffer_get_string(&m, NULL); 932 buffer_free(&m); 933 934 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 935 (*prompts)[0] = challenge; 936 937 debug3("%s: received challenge: %s", __func__, challenge); 938 939 return (0); 940 } 941 942 int 943 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 944 { 945 Buffer m; 946 int authok; 947 948 debug3("%s: entering", __func__); 949 if (numresponses != 1) 950 return (-1); 951 952 buffer_init(&m); 953 buffer_put_cstring(&m, responses[0]); 954 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 955 956 mm_request_receive_expect(pmonitor->m_recvfd, 957 MONITOR_ANS_BSDAUTHRESPOND, &m); 958 959 authok = buffer_get_int(&m); 960 buffer_free(&m); 961 962 return ((authok == 0) ? -1 : 0); 963 } 964 965 #ifdef SKEY 966 int 967 mm_skey_query(void *ctx, char **name, char **infotxt, 968 u_int *numprompts, char ***prompts, u_int **echo_on) 969 { 970 Buffer m; 971 u_int success; 972 char *challenge; 973 974 debug3("%s: entering", __func__); 975 976 buffer_init(&m); 977 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); 978 979 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, 980 &m); 981 success = buffer_get_int(&m); 982 if (success == 0) { 983 debug3("%s: no challenge", __func__); 984 buffer_free(&m); 985 return (-1); 986 } 987 988 /* Get the challenge, and format the response */ 989 challenge = buffer_get_string(&m, NULL); 990 buffer_free(&m); 991 992 debug3("%s: received challenge: %s", __func__, challenge); 993 994 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 995 996 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); 997 xfree(challenge); 998 999 return (0); 1000 } 1001 1002 int 1003 mm_skey_respond(void *ctx, u_int numresponses, char **responses) 1004 { 1005 Buffer m; 1006 int authok; 1007 1008 debug3("%s: entering", __func__); 1009 if (numresponses != 1) 1010 return (-1); 1011 1012 buffer_init(&m); 1013 buffer_put_cstring(&m, responses[0]); 1014 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); 1015 1016 mm_request_receive_expect(pmonitor->m_recvfd, 1017 MONITOR_ANS_SKEYRESPOND, &m); 1018 1019 authok = buffer_get_int(&m); 1020 buffer_free(&m); 1021 1022 return ((authok == 0) ? -1 : 0); 1023 } 1024 #endif /* SKEY */ 1025 1026 void 1027 mm_ssh1_session_id(u_char session_id[16]) 1028 { 1029 Buffer m; 1030 int i; 1031 1032 debug3("%s entering", __func__); 1033 1034 buffer_init(&m); 1035 for (i = 0; i < 16; i++) 1036 buffer_put_char(&m, session_id[i]); 1037 1038 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); 1039 buffer_free(&m); 1040 } 1041 1042 int 1043 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) 1044 { 1045 Buffer m; 1046 Key *key; 1047 u_char *blob; 1048 u_int blen; 1049 int allowed = 0, have_forced = 0; 1050 1051 debug3("%s entering", __func__); 1052 1053 buffer_init(&m); 1054 buffer_put_bignum2(&m, client_n); 1055 1056 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); 1057 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); 1058 1059 allowed = buffer_get_int(&m); 1060 1061 /* fake forced command */ 1062 auth_clear_options(); 1063 have_forced = buffer_get_int(&m); 1064 forced_command = have_forced ? xstrdup("true") : NULL; 1065 1066 if (allowed && rkey != NULL) { 1067 blob = buffer_get_string(&m, &blen); 1068 if ((key = key_from_blob(blob, blen)) == NULL) 1069 fatal("%s: key_from_blob failed", __func__); 1070 *rkey = key; 1071 xfree(blob); 1072 } 1073 buffer_free(&m); 1074 1075 return (allowed); 1076 } 1077 1078 BIGNUM * 1079 mm_auth_rsa_generate_challenge(Key *key) 1080 { 1081 Buffer m; 1082 BIGNUM *challenge; 1083 u_char *blob; 1084 u_int blen; 1085 1086 debug3("%s entering", __func__); 1087 1088 if ((challenge = BN_new()) == NULL) 1089 fatal("%s: BN_new failed", __func__); 1090 1091 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1092 if (key_to_blob(key, &blob, &blen) == 0) 1093 fatal("%s: key_to_blob failed", __func__); 1094 key->type = KEY_RSA1; 1095 1096 buffer_init(&m); 1097 buffer_put_string(&m, blob, blen); 1098 xfree(blob); 1099 1100 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); 1101 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); 1102 1103 buffer_get_bignum2(&m, challenge); 1104 buffer_free(&m); 1105 1106 return (challenge); 1107 } 1108 1109 int 1110 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) 1111 { 1112 Buffer m; 1113 u_char *blob; 1114 u_int blen; 1115 int success = 0; 1116 1117 debug3("%s entering", __func__); 1118 1119 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1120 if (key_to_blob(key, &blob, &blen) == 0) 1121 fatal("%s: key_to_blob failed", __func__); 1122 key->type = KEY_RSA1; 1123 1124 buffer_init(&m); 1125 buffer_put_string(&m, blob, blen); 1126 buffer_put_string(&m, response, 16); 1127 xfree(blob); 1128 1129 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); 1130 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); 1131 1132 success = buffer_get_int(&m); 1133 buffer_free(&m); 1134 1135 return (success); 1136 } 1137 1138 #ifdef SSH_AUDIT_EVENTS 1139 void 1140 mm_audit_event(ssh_audit_event_t event) 1141 { 1142 Buffer m; 1143 1144 debug3("%s entering", __func__); 1145 1146 buffer_init(&m); 1147 buffer_put_int(&m, event); 1148 1149 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); 1150 buffer_free(&m); 1151 } 1152 1153 void 1154 mm_audit_run_command(const char *command) 1155 { 1156 Buffer m; 1157 1158 debug3("%s entering command %s", __func__, command); 1159 1160 buffer_init(&m); 1161 buffer_put_cstring(&m, command); 1162 1163 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); 1164 buffer_free(&m); 1165 } 1166 #endif /* SSH_AUDIT_EVENTS */ 1167 1168 #ifdef GSSAPI 1169 OM_uint32 1170 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 1171 { 1172 Buffer m; 1173 OM_uint32 major; 1174 1175 /* Client doesn't get to see the context */ 1176 *ctx = NULL; 1177 1178 buffer_init(&m); 1179 buffer_put_string(&m, goid->elements, goid->length); 1180 1181 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 1182 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 1183 1184 major = buffer_get_int(&m); 1185 1186 buffer_free(&m); 1187 return (major); 1188 } 1189 1190 OM_uint32 1191 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 1192 gss_buffer_desc *out, OM_uint32 *flags) 1193 { 1194 Buffer m; 1195 OM_uint32 major; 1196 u_int len; 1197 1198 buffer_init(&m); 1199 buffer_put_string(&m, in->value, in->length); 1200 1201 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 1202 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 1203 1204 major = buffer_get_int(&m); 1205 out->value = buffer_get_string(&m, &len); 1206 out->length = len; 1207 if (flags) 1208 *flags = buffer_get_int(&m); 1209 1210 buffer_free(&m); 1211 1212 return (major); 1213 } 1214 1215 OM_uint32 1216 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 1217 { 1218 Buffer m; 1219 OM_uint32 major; 1220 1221 buffer_init(&m); 1222 buffer_put_string(&m, gssbuf->value, gssbuf->length); 1223 buffer_put_string(&m, gssmic->value, gssmic->length); 1224 1225 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 1226 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 1227 &m); 1228 1229 major = buffer_get_int(&m); 1230 buffer_free(&m); 1231 return(major); 1232 } 1233 1234 int 1235 mm_ssh_gssapi_userok(char *user) 1236 { 1237 Buffer m; 1238 int authenticated = 0; 1239 1240 buffer_init(&m); 1241 1242 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 1243 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 1244 &m); 1245 1246 authenticated = buffer_get_int(&m); 1247 1248 buffer_free(&m); 1249 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 1250 return (authenticated); 1251 } 1252 #endif /* GSSAPI */ 1253 1254 #ifdef JPAKE 1255 void 1256 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, 1257 char **hash_scheme, char **salt) 1258 { 1259 Buffer m; 1260 1261 debug3("%s entering", __func__); 1262 1263 buffer_init(&m); 1264 mm_request_send(pmonitor->m_recvfd, 1265 MONITOR_REQ_JPAKE_GET_PWDATA, &m); 1266 1267 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); 1268 mm_request_receive_expect(pmonitor->m_recvfd, 1269 MONITOR_ANS_JPAKE_GET_PWDATA, &m); 1270 1271 *hash_scheme = buffer_get_string(&m, NULL); 1272 *salt = buffer_get_string(&m, NULL); 1273 1274 buffer_free(&m); 1275 } 1276 1277 void 1278 mm_jpake_step1(struct modp_group *grp, 1279 u_char **id, u_int *id_len, 1280 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, 1281 u_char **priv1_proof, u_int *priv1_proof_len, 1282 u_char **priv2_proof, u_int *priv2_proof_len) 1283 { 1284 Buffer m; 1285 1286 debug3("%s entering", __func__); 1287 1288 buffer_init(&m); 1289 mm_request_send(pmonitor->m_recvfd, 1290 MONITOR_REQ_JPAKE_STEP1, &m); 1291 1292 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); 1293 mm_request_receive_expect(pmonitor->m_recvfd, 1294 MONITOR_ANS_JPAKE_STEP1, &m); 1295 1296 if ((*priv1 = BN_new()) == NULL || 1297 (*priv2 = BN_new()) == NULL || 1298 (*g_priv1 = BN_new()) == NULL || 1299 (*g_priv2 = BN_new()) == NULL) 1300 fatal("%s: BN_new", __func__); 1301 1302 *id = buffer_get_string(&m, id_len); 1303 /* priv1 and priv2 are, well, private */ 1304 buffer_get_bignum2(&m, *g_priv1); 1305 buffer_get_bignum2(&m, *g_priv2); 1306 *priv1_proof = buffer_get_string(&m, priv1_proof_len); 1307 *priv2_proof = buffer_get_string(&m, priv2_proof_len); 1308 1309 buffer_free(&m); 1310 } 1311 1312 void 1313 mm_jpake_step2(struct modp_group *grp, BIGNUM *s, 1314 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, 1315 const u_char *theirid, u_int theirid_len, 1316 const u_char *myid, u_int myid_len, 1317 const u_char *theirpub1_proof, u_int theirpub1_proof_len, 1318 const u_char *theirpub2_proof, u_int theirpub2_proof_len, 1319 BIGNUM **newpub, 1320 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) 1321 { 1322 Buffer m; 1323 1324 debug3("%s entering", __func__); 1325 1326 buffer_init(&m); 1327 /* monitor already has all bignums except theirpub1, theirpub2 */ 1328 buffer_put_bignum2(&m, theirpub1); 1329 buffer_put_bignum2(&m, theirpub2); 1330 /* monitor already knows our id */ 1331 buffer_put_string(&m, theirid, theirid_len); 1332 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); 1333 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); 1334 1335 mm_request_send(pmonitor->m_recvfd, 1336 MONITOR_REQ_JPAKE_STEP2, &m); 1337 1338 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); 1339 mm_request_receive_expect(pmonitor->m_recvfd, 1340 MONITOR_ANS_JPAKE_STEP2, &m); 1341 1342 if ((*newpub = BN_new()) == NULL) 1343 fatal("%s: BN_new", __func__); 1344 1345 buffer_get_bignum2(&m, *newpub); 1346 *newpub_exponent_proof = buffer_get_string(&m, 1347 newpub_exponent_proof_len); 1348 1349 buffer_free(&m); 1350 } 1351 1352 void 1353 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val, 1354 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, 1355 BIGNUM *theirpub1, BIGNUM *theirpub2, 1356 const u_char *my_id, u_int my_id_len, 1357 const u_char *their_id, u_int their_id_len, 1358 const u_char *sess_id, u_int sess_id_len, 1359 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, 1360 BIGNUM **k, 1361 u_char **confirm_hash, u_int *confirm_hash_len) 1362 { 1363 Buffer m; 1364 1365 debug3("%s entering", __func__); 1366 1367 buffer_init(&m); 1368 /* monitor already has all bignums except step2_val */ 1369 buffer_put_bignum2(&m, step2_val); 1370 /* monitor already knows all the ids */ 1371 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); 1372 1373 mm_request_send(pmonitor->m_recvfd, 1374 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); 1375 1376 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); 1377 mm_request_receive_expect(pmonitor->m_recvfd, 1378 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); 1379 1380 /* 'k' is sensitive and stays in the monitor */ 1381 *confirm_hash = buffer_get_string(&m, confirm_hash_len); 1382 1383 buffer_free(&m); 1384 } 1385 1386 int 1387 mm_jpake_check_confirm(const BIGNUM *k, 1388 const u_char *peer_id, u_int peer_id_len, 1389 const u_char *sess_id, u_int sess_id_len, 1390 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) 1391 { 1392 Buffer m; 1393 int success = 0; 1394 1395 debug3("%s entering", __func__); 1396 1397 buffer_init(&m); 1398 /* k is dummy in slave, ignored */ 1399 /* monitor knows all the ids */ 1400 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); 1401 mm_request_send(pmonitor->m_recvfd, 1402 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); 1403 1404 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); 1405 mm_request_receive_expect(pmonitor->m_recvfd, 1406 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); 1407 1408 success = buffer_get_int(&m); 1409 buffer_free(&m); 1410 1411 debug3("%s: success = %d", __func__, success); 1412 return success; 1413 } 1414 #endif /* JPAKE */ 1415