1 /* $OpenBSD: monitor_wrap.c,v 1.68 2009/06/22 05:39:28 dtucker 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 77 #include "channels.h" 78 #include "session.h" 79 #include "servconf.h" 80 #include "roaming.h" 81 82 /* Imports */ 83 extern int compat20; 84 extern z_stream incoming_stream; 85 extern z_stream outgoing_stream; 86 extern struct monitor *pmonitor; 87 extern Buffer loginmsg; 88 extern ServerOptions options; 89 90 int 91 mm_is_monitor(void) 92 { 93 /* 94 * m_pid is only set in the privileged part, and 95 * points to the unprivileged child. 96 */ 97 return (pmonitor && pmonitor->m_pid > 0); 98 } 99 100 void 101 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) 102 { 103 u_int mlen = buffer_len(m); 104 u_char buf[5]; 105 106 debug3("%s entering: type %d", __func__, type); 107 108 put_u32(buf, mlen + 1); 109 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ 110 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) 111 fatal("%s: write: %s", __func__, strerror(errno)); 112 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) 113 fatal("%s: write: %s", __func__, strerror(errno)); 114 } 115 116 void 117 mm_request_receive(int sock, Buffer *m) 118 { 119 u_char buf[4]; 120 u_int msg_len; 121 122 debug3("%s entering", __func__); 123 124 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { 125 if (errno == EPIPE) 126 cleanup_exit(255); 127 fatal("%s: read: %s", __func__, strerror(errno)); 128 } 129 msg_len = get_u32(buf); 130 if (msg_len > 256 * 1024) 131 fatal("%s: read: bad msg_len %d", __func__, msg_len); 132 buffer_clear(m); 133 buffer_append_space(m, msg_len); 134 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) 135 fatal("%s: read: %s", __func__, strerror(errno)); 136 } 137 138 void 139 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) 140 { 141 u_char rtype; 142 143 debug3("%s entering: type %d", __func__, type); 144 145 mm_request_receive(sock, m); 146 rtype = buffer_get_char(m); 147 if (rtype != type) 148 fatal("%s: read: rtype %d != type %d", __func__, 149 rtype, type); 150 } 151 152 DH * 153 mm_choose_dh(int min, int nbits, int max) 154 { 155 BIGNUM *p, *g; 156 int success = 0; 157 Buffer m; 158 159 buffer_init(&m); 160 buffer_put_int(&m, min); 161 buffer_put_int(&m, nbits); 162 buffer_put_int(&m, max); 163 164 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); 165 166 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); 167 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); 168 169 success = buffer_get_char(&m); 170 if (success == 0) 171 fatal("%s: MONITOR_ANS_MODULI failed", __func__); 172 173 if ((p = BN_new()) == NULL) 174 fatal("%s: BN_new failed", __func__); 175 if ((g = BN_new()) == NULL) 176 fatal("%s: BN_new failed", __func__); 177 buffer_get_bignum2(&m, p); 178 buffer_get_bignum2(&m, g); 179 180 debug3("%s: remaining %d", __func__, buffer_len(&m)); 181 buffer_free(&m); 182 183 return (dh_new_group(g, p)); 184 } 185 186 int 187 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) 188 { 189 Kex *kex = *pmonitor->m_pkex; 190 Buffer m; 191 192 debug3("%s entering", __func__); 193 194 buffer_init(&m); 195 buffer_put_int(&m, kex->host_key_index(key)); 196 buffer_put_string(&m, data, datalen); 197 198 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); 199 200 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); 201 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); 202 *sigp = buffer_get_string(&m, lenp); 203 buffer_free(&m); 204 205 return (0); 206 } 207 208 struct passwd * 209 mm_getpwnamallow(const char *username) 210 { 211 Buffer m; 212 struct passwd *pw; 213 u_int len; 214 ServerOptions *newopts; 215 216 debug3("%s entering", __func__); 217 218 buffer_init(&m); 219 buffer_put_cstring(&m, username); 220 221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); 222 223 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); 224 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); 225 226 if (buffer_get_char(&m) == 0) { 227 pw = NULL; 228 goto out; 229 } 230 pw = buffer_get_string(&m, &len); 231 if (len != sizeof(struct passwd)) 232 fatal("%s: struct passwd size mismatch", __func__); 233 pw->pw_name = buffer_get_string(&m, NULL); 234 pw->pw_passwd = buffer_get_string(&m, NULL); 235 pw->pw_gecos = buffer_get_string(&m, NULL); 236 #ifdef HAVE_PW_CLASS_IN_PASSWD 237 pw->pw_class = buffer_get_string(&m, NULL); 238 #endif 239 pw->pw_dir = buffer_get_string(&m, NULL); 240 pw->pw_shell = buffer_get_string(&m, NULL); 241 242 out: 243 /* copy options block as a Match directive may have changed some */ 244 newopts = buffer_get_string(&m, &len); 245 if (len != sizeof(*newopts)) 246 fatal("%s: option block size mismatch", __func__); 247 if (newopts->banner != NULL) 248 newopts->banner = buffer_get_string(&m, NULL); 249 copy_set_server_options(&options, newopts, 1); 250 xfree(newopts); 251 252 buffer_free(&m); 253 254 return (pw); 255 } 256 257 char * 258 mm_auth2_read_banner(void) 259 { 260 Buffer m; 261 char *banner; 262 263 debug3("%s entering", __func__); 264 265 buffer_init(&m); 266 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 267 buffer_clear(&m); 268 269 mm_request_receive_expect(pmonitor->m_recvfd, 270 MONITOR_ANS_AUTH2_READ_BANNER, &m); 271 banner = buffer_get_string(&m, NULL); 272 buffer_free(&m); 273 274 /* treat empty banner as missing banner */ 275 if (strlen(banner) == 0) { 276 xfree(banner); 277 banner = NULL; 278 } 279 return (banner); 280 } 281 282 /* Inform the privileged process about service and style */ 283 284 void 285 mm_inform_authserv(char *service, char *style) 286 { 287 Buffer m; 288 289 debug3("%s entering", __func__); 290 291 buffer_init(&m); 292 buffer_put_cstring(&m, service); 293 buffer_put_cstring(&m, style ? style : ""); 294 295 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 296 297 buffer_free(&m); 298 } 299 300 /* Do the password authentication */ 301 int 302 mm_auth_password(Authctxt *authctxt, char *password) 303 { 304 Buffer m; 305 int authenticated = 0; 306 307 debug3("%s entering", __func__); 308 309 buffer_init(&m); 310 buffer_put_cstring(&m, password); 311 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 312 313 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 314 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 315 316 authenticated = buffer_get_int(&m); 317 318 buffer_free(&m); 319 320 debug3("%s: user %sauthenticated", 321 __func__, authenticated ? "" : "not "); 322 return (authenticated); 323 } 324 325 int 326 mm_user_key_allowed(struct passwd *pw, Key *key) 327 { 328 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); 329 } 330 331 int 332 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, 333 Key *key) 334 { 335 return (mm_key_allowed(MM_HOSTKEY, user, host, key)); 336 } 337 338 int 339 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, 340 char *host, Key *key) 341 { 342 int ret; 343 344 key->type = KEY_RSA; /* XXX hack for key_to_blob */ 345 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); 346 key->type = KEY_RSA1; 347 return (ret); 348 } 349 350 static void 351 mm_send_debug(Buffer *m) 352 { 353 char *msg; 354 355 while (buffer_len(m)) { 356 msg = buffer_get_string(m, NULL); 357 debug3("%s: Sending debug: %s", __func__, msg); 358 packet_send_debug("%s", msg); 359 xfree(msg); 360 } 361 } 362 363 int 364 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) 365 { 366 Buffer m; 367 u_char *blob; 368 u_int len; 369 int allowed = 0, have_forced = 0; 370 371 debug3("%s entering", __func__); 372 373 /* Convert the key to a blob and the pass it over */ 374 if (!key_to_blob(key, &blob, &len)) 375 return (0); 376 377 buffer_init(&m); 378 buffer_put_int(&m, type); 379 buffer_put_cstring(&m, user ? user : ""); 380 buffer_put_cstring(&m, host ? host : ""); 381 buffer_put_string(&m, blob, len); 382 xfree(blob); 383 384 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 385 386 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 387 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 388 389 allowed = buffer_get_int(&m); 390 391 /* fake forced command */ 392 auth_clear_options(); 393 have_forced = buffer_get_int(&m); 394 forced_command = have_forced ? xstrdup("true") : NULL; 395 396 /* Send potential debug messages */ 397 mm_send_debug(&m); 398 399 buffer_free(&m); 400 401 return (allowed); 402 } 403 404 /* 405 * This key verify needs to send the key type along, because the 406 * privileged parent makes the decision if the key is allowed 407 * for authentication. 408 */ 409 410 int 411 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) 412 { 413 Buffer m; 414 u_char *blob; 415 u_int len; 416 int verified = 0; 417 418 debug3("%s entering", __func__); 419 420 /* Convert the key to a blob and the pass it over */ 421 if (!key_to_blob(key, &blob, &len)) 422 return (0); 423 424 buffer_init(&m); 425 buffer_put_string(&m, blob, len); 426 buffer_put_string(&m, sig, siglen); 427 buffer_put_string(&m, data, datalen); 428 xfree(blob); 429 430 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 431 432 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 433 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 434 435 verified = buffer_get_int(&m); 436 437 buffer_free(&m); 438 439 return (verified); 440 } 441 442 /* Export key state after authentication */ 443 Newkeys * 444 mm_newkeys_from_blob(u_char *blob, int blen) 445 { 446 Buffer b; 447 u_int len; 448 Newkeys *newkey = NULL; 449 Enc *enc; 450 Mac *mac; 451 Comp *comp; 452 453 debug3("%s: %p(%d)", __func__, blob, blen); 454 #ifdef DEBUG_PK 455 dump_base64(stderr, blob, blen); 456 #endif 457 buffer_init(&b); 458 buffer_append(&b, blob, blen); 459 460 newkey = xmalloc(sizeof(*newkey)); 461 enc = &newkey->enc; 462 mac = &newkey->mac; 463 comp = &newkey->comp; 464 465 /* Enc structure */ 466 enc->name = buffer_get_string(&b, NULL); 467 buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); 468 enc->enabled = buffer_get_int(&b); 469 enc->block_size = buffer_get_int(&b); 470 enc->key = buffer_get_string(&b, &enc->key_len); 471 enc->iv = buffer_get_string(&b, &len); 472 if (len != enc->block_size) 473 fatal("%s: bad ivlen: expected %u != %u", __func__, 474 enc->block_size, len); 475 476 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) 477 fatal("%s: bad cipher name %s or pointer %p", __func__, 478 enc->name, enc->cipher); 479 480 /* Mac structure */ 481 mac->name = buffer_get_string(&b, NULL); 482 if (mac->name == NULL || mac_setup(mac, mac->name) == -1) 483 fatal("%s: can not setup mac %s", __func__, mac->name); 484 mac->enabled = buffer_get_int(&b); 485 mac->key = buffer_get_string(&b, &len); 486 if (len > mac->key_len) 487 fatal("%s: bad mac key length: %u > %d", __func__, len, 488 mac->key_len); 489 mac->key_len = len; 490 491 /* Comp structure */ 492 comp->type = buffer_get_int(&b); 493 comp->enabled = buffer_get_int(&b); 494 comp->name = buffer_get_string(&b, NULL); 495 496 len = buffer_len(&b); 497 if (len != 0) 498 error("newkeys_from_blob: remaining bytes in blob %u", len); 499 buffer_free(&b); 500 return (newkey); 501 } 502 503 int 504 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) 505 { 506 Buffer b; 507 int len; 508 Enc *enc; 509 Mac *mac; 510 Comp *comp; 511 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode); 512 513 debug3("%s: converting %p", __func__, newkey); 514 515 if (newkey == NULL) { 516 error("%s: newkey == NULL", __func__); 517 return 0; 518 } 519 enc = &newkey->enc; 520 mac = &newkey->mac; 521 comp = &newkey->comp; 522 523 buffer_init(&b); 524 /* Enc structure */ 525 buffer_put_cstring(&b, enc->name); 526 /* The cipher struct is constant and shared, you export pointer */ 527 buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); 528 buffer_put_int(&b, enc->enabled); 529 buffer_put_int(&b, enc->block_size); 530 buffer_put_string(&b, enc->key, enc->key_len); 531 packet_get_keyiv(mode, enc->iv, enc->block_size); 532 buffer_put_string(&b, enc->iv, enc->block_size); 533 534 /* Mac structure */ 535 buffer_put_cstring(&b, mac->name); 536 buffer_put_int(&b, mac->enabled); 537 buffer_put_string(&b, mac->key, mac->key_len); 538 539 /* Comp structure */ 540 buffer_put_int(&b, comp->type); 541 buffer_put_int(&b, comp->enabled); 542 buffer_put_cstring(&b, comp->name); 543 544 len = buffer_len(&b); 545 if (lenp != NULL) 546 *lenp = len; 547 if (blobp != NULL) { 548 *blobp = xmalloc(len); 549 memcpy(*blobp, buffer_ptr(&b), len); 550 } 551 memset(buffer_ptr(&b), 0, len); 552 buffer_free(&b); 553 return len; 554 } 555 556 static void 557 mm_send_kex(Buffer *m, Kex *kex) 558 { 559 buffer_put_string(m, kex->session_id, kex->session_id_len); 560 buffer_put_int(m, kex->we_need); 561 buffer_put_int(m, kex->hostkey_type); 562 buffer_put_int(m, kex->kex_type); 563 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); 564 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); 565 buffer_put_int(m, kex->flags); 566 buffer_put_cstring(m, kex->client_version_string); 567 buffer_put_cstring(m, kex->server_version_string); 568 } 569 570 void 571 mm_send_keystate(struct monitor *monitor) 572 { 573 Buffer m, *input, *output; 574 u_char *blob, *p; 575 u_int bloblen, plen; 576 u_int32_t seqnr, packets; 577 u_int64_t blocks, bytes; 578 579 buffer_init(&m); 580 581 if (!compat20) { 582 u_char iv[24]; 583 u_char *key; 584 u_int ivlen, keylen; 585 586 buffer_put_int(&m, packet_get_protocol_flags()); 587 588 buffer_put_int(&m, packet_get_ssh1_cipher()); 589 590 debug3("%s: Sending ssh1 KEY+IV", __func__); 591 keylen = packet_get_encryption_key(NULL); 592 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ 593 keylen = packet_get_encryption_key(key); 594 buffer_put_string(&m, key, keylen); 595 memset(key, 0, keylen); 596 xfree(key); 597 598 ivlen = packet_get_keyiv_len(MODE_OUT); 599 packet_get_keyiv(MODE_OUT, iv, ivlen); 600 buffer_put_string(&m, iv, ivlen); 601 ivlen = packet_get_keyiv_len(MODE_OUT); 602 packet_get_keyiv(MODE_IN, iv, ivlen); 603 buffer_put_string(&m, iv, ivlen); 604 goto skip; 605 } else { 606 /* Kex for rekeying */ 607 mm_send_kex(&m, *monitor->m_pkex); 608 } 609 610 debug3("%s: Sending new keys: %p %p", 611 __func__, packet_get_newkeys(MODE_OUT), 612 packet_get_newkeys(MODE_IN)); 613 614 /* Keys from Kex */ 615 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) 616 fatal("%s: conversion of newkeys failed", __func__); 617 618 buffer_put_string(&m, blob, bloblen); 619 xfree(blob); 620 621 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) 622 fatal("%s: conversion of newkeys failed", __func__); 623 624 buffer_put_string(&m, blob, bloblen); 625 xfree(blob); 626 627 packet_get_state(MODE_OUT, &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 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); 633 buffer_put_int(&m, seqnr); 634 buffer_put_int64(&m, blocks); 635 buffer_put_int(&m, packets); 636 buffer_put_int64(&m, bytes); 637 638 debug3("%s: New keys have been sent", __func__); 639 skip: 640 /* More key context */ 641 plen = packet_get_keycontext(MODE_OUT, NULL); 642 p = xmalloc(plen+1); 643 packet_get_keycontext(MODE_OUT, p); 644 buffer_put_string(&m, p, plen); 645 xfree(p); 646 647 plen = packet_get_keycontext(MODE_IN, NULL); 648 p = xmalloc(plen+1); 649 packet_get_keycontext(MODE_IN, p); 650 buffer_put_string(&m, p, plen); 651 xfree(p); 652 653 /* Compression state */ 654 debug3("%s: Sending compression state", __func__); 655 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); 656 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); 657 658 /* Network I/O buffers */ 659 input = (Buffer *)packet_get_input(); 660 output = (Buffer *)packet_get_output(); 661 buffer_put_string(&m, buffer_ptr(input), buffer_len(input)); 662 buffer_put_string(&m, buffer_ptr(output), buffer_len(output)); 663 664 /* Roaming */ 665 if (compat20) { 666 buffer_put_int64(&m, get_sent_bytes()); 667 buffer_put_int64(&m, get_recv_bytes()); 668 } 669 670 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); 671 debug3("%s: Finished sending state", __func__); 672 673 buffer_free(&m); 674 } 675 676 int 677 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 678 { 679 Buffer m; 680 char *p, *msg; 681 int success = 0, tmp1 = -1, tmp2 = -1; 682 683 /* Kludge: ensure there are fds free to receive the pty/tty */ 684 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 685 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 686 error("%s: cannot allocate fds for pty", __func__); 687 if (tmp1 > 0) 688 close(tmp1); 689 if (tmp2 > 0) 690 close(tmp2); 691 return 0; 692 } 693 close(tmp1); 694 close(tmp2); 695 696 buffer_init(&m); 697 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 698 699 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 700 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 701 702 success = buffer_get_int(&m); 703 if (success == 0) { 704 debug3("%s: pty alloc failed", __func__); 705 buffer_free(&m); 706 return (0); 707 } 708 p = buffer_get_string(&m, NULL); 709 msg = buffer_get_string(&m, NULL); 710 buffer_free(&m); 711 712 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 713 xfree(p); 714 715 buffer_append(&loginmsg, msg, strlen(msg)); 716 xfree(msg); 717 718 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 719 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 720 fatal("%s: receive fds failed", __func__); 721 722 /* Success */ 723 return (1); 724 } 725 726 void 727 mm_session_pty_cleanup2(Session *s) 728 { 729 Buffer m; 730 731 if (s->ttyfd == -1) 732 return; 733 buffer_init(&m); 734 buffer_put_cstring(&m, s->tty); 735 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 736 buffer_free(&m); 737 738 /* closed dup'ed master */ 739 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 740 error("close(s->ptymaster/%d): %s", 741 s->ptymaster, strerror(errno)); 742 743 /* unlink pty from session */ 744 s->ttyfd = -1; 745 } 746 747 #ifdef USE_PAM 748 void 749 mm_start_pam(Authctxt *authctxt) 750 { 751 Buffer m; 752 753 debug3("%s entering", __func__); 754 if (!options.use_pam) 755 fatal("UsePAM=no, but ended up in %s anyway", __func__); 756 757 buffer_init(&m); 758 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); 759 760 buffer_free(&m); 761 } 762 763 u_int 764 mm_do_pam_account(void) 765 { 766 Buffer m; 767 u_int ret; 768 char *msg; 769 770 debug3("%s entering", __func__); 771 if (!options.use_pam) 772 fatal("UsePAM=no, but ended up in %s anyway", __func__); 773 774 buffer_init(&m); 775 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); 776 777 mm_request_receive_expect(pmonitor->m_recvfd, 778 MONITOR_ANS_PAM_ACCOUNT, &m); 779 ret = buffer_get_int(&m); 780 msg = buffer_get_string(&m, NULL); 781 buffer_append(&loginmsg, msg, strlen(msg)); 782 xfree(msg); 783 784 buffer_free(&m); 785 786 debug3("%s returning %d", __func__, ret); 787 788 return (ret); 789 } 790 791 void * 792 mm_sshpam_init_ctx(Authctxt *authctxt) 793 { 794 Buffer m; 795 int success; 796 797 debug3("%s", __func__); 798 buffer_init(&m); 799 buffer_put_cstring(&m, authctxt->user); 800 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); 801 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); 802 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); 803 success = buffer_get_int(&m); 804 if (success == 0) { 805 debug3("%s: pam_init_ctx failed", __func__); 806 buffer_free(&m); 807 return (NULL); 808 } 809 buffer_free(&m); 810 return (authctxt); 811 } 812 813 int 814 mm_sshpam_query(void *ctx, char **name, char **info, 815 u_int *num, char ***prompts, u_int **echo_on) 816 { 817 Buffer m; 818 u_int i; 819 int ret; 820 821 debug3("%s", __func__); 822 buffer_init(&m); 823 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); 824 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); 825 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); 826 ret = buffer_get_int(&m); 827 debug3("%s: pam_query returned %d", __func__, ret); 828 *name = buffer_get_string(&m, NULL); 829 *info = buffer_get_string(&m, NULL); 830 *num = buffer_get_int(&m); 831 if (*num > PAM_MAX_NUM_MSG) 832 fatal("%s: recieved %u PAM messages, expected <= %u", 833 __func__, *num, PAM_MAX_NUM_MSG); 834 *prompts = xcalloc((*num + 1), sizeof(char *)); 835 *echo_on = xcalloc((*num + 1), sizeof(u_int)); 836 for (i = 0; i < *num; ++i) { 837 (*prompts)[i] = buffer_get_string(&m, NULL); 838 (*echo_on)[i] = buffer_get_int(&m); 839 } 840 buffer_free(&m); 841 return (ret); 842 } 843 844 int 845 mm_sshpam_respond(void *ctx, u_int num, char **resp) 846 { 847 Buffer m; 848 u_int i; 849 int ret; 850 851 debug3("%s", __func__); 852 buffer_init(&m); 853 buffer_put_int(&m, num); 854 for (i = 0; i < num; ++i) 855 buffer_put_cstring(&m, resp[i]); 856 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); 857 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); 858 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); 859 ret = buffer_get_int(&m); 860 debug3("%s: pam_respond returned %d", __func__, ret); 861 buffer_free(&m); 862 return (ret); 863 } 864 865 void 866 mm_sshpam_free_ctx(void *ctxtp) 867 { 868 Buffer m; 869 870 debug3("%s", __func__); 871 buffer_init(&m); 872 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); 873 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); 874 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); 875 buffer_free(&m); 876 } 877 #endif /* USE_PAM */ 878 879 /* Request process termination */ 880 881 void 882 mm_terminate(void) 883 { 884 Buffer m; 885 886 buffer_init(&m); 887 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 888 buffer_free(&m); 889 } 890 891 int 892 mm_ssh1_session_key(BIGNUM *num) 893 { 894 int rsafail; 895 Buffer m; 896 897 buffer_init(&m); 898 buffer_put_bignum2(&m, num); 899 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); 900 901 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); 902 903 rsafail = buffer_get_int(&m); 904 buffer_get_bignum2(&m, num); 905 906 buffer_free(&m); 907 908 return (rsafail); 909 } 910 911 static void 912 mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 913 char ***prompts, u_int **echo_on) 914 { 915 *name = xstrdup(""); 916 *infotxt = xstrdup(""); 917 *numprompts = 1; 918 *prompts = xcalloc(*numprompts, sizeof(char *)); 919 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 920 (*echo_on)[0] = 0; 921 } 922 923 int 924 mm_bsdauth_query(void *ctx, char **name, char **infotxt, 925 u_int *numprompts, char ***prompts, u_int **echo_on) 926 { 927 Buffer m; 928 u_int success; 929 char *challenge; 930 931 debug3("%s: entering", __func__); 932 933 buffer_init(&m); 934 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 935 936 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 937 &m); 938 success = buffer_get_int(&m); 939 if (success == 0) { 940 debug3("%s: no challenge", __func__); 941 buffer_free(&m); 942 return (-1); 943 } 944 945 /* Get the challenge, and format the response */ 946 challenge = buffer_get_string(&m, NULL); 947 buffer_free(&m); 948 949 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 950 (*prompts)[0] = challenge; 951 952 debug3("%s: received challenge: %s", __func__, challenge); 953 954 return (0); 955 } 956 957 int 958 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 959 { 960 Buffer m; 961 int authok; 962 963 debug3("%s: entering", __func__); 964 if (numresponses != 1) 965 return (-1); 966 967 buffer_init(&m); 968 buffer_put_cstring(&m, responses[0]); 969 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 970 971 mm_request_receive_expect(pmonitor->m_recvfd, 972 MONITOR_ANS_BSDAUTHRESPOND, &m); 973 974 authok = buffer_get_int(&m); 975 buffer_free(&m); 976 977 return ((authok == 0) ? -1 : 0); 978 } 979 980 #ifdef SKEY 981 int 982 mm_skey_query(void *ctx, char **name, char **infotxt, 983 u_int *numprompts, char ***prompts, u_int **echo_on) 984 { 985 Buffer m; 986 u_int success; 987 char *challenge; 988 989 debug3("%s: entering", __func__); 990 991 buffer_init(&m); 992 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); 993 994 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, 995 &m); 996 success = buffer_get_int(&m); 997 if (success == 0) { 998 debug3("%s: no challenge", __func__); 999 buffer_free(&m); 1000 return (-1); 1001 } 1002 1003 /* Get the challenge, and format the response */ 1004 challenge = buffer_get_string(&m, NULL); 1005 buffer_free(&m); 1006 1007 debug3("%s: received challenge: %s", __func__, challenge); 1008 1009 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 1010 1011 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); 1012 xfree(challenge); 1013 1014 return (0); 1015 } 1016 1017 int 1018 mm_skey_respond(void *ctx, u_int numresponses, char **responses) 1019 { 1020 Buffer m; 1021 int authok; 1022 1023 debug3("%s: entering", __func__); 1024 if (numresponses != 1) 1025 return (-1); 1026 1027 buffer_init(&m); 1028 buffer_put_cstring(&m, responses[0]); 1029 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); 1030 1031 mm_request_receive_expect(pmonitor->m_recvfd, 1032 MONITOR_ANS_SKEYRESPOND, &m); 1033 1034 authok = buffer_get_int(&m); 1035 buffer_free(&m); 1036 1037 return ((authok == 0) ? -1 : 0); 1038 } 1039 #endif /* SKEY */ 1040 1041 void 1042 mm_ssh1_session_id(u_char session_id[16]) 1043 { 1044 Buffer m; 1045 int i; 1046 1047 debug3("%s entering", __func__); 1048 1049 buffer_init(&m); 1050 for (i = 0; i < 16; i++) 1051 buffer_put_char(&m, session_id[i]); 1052 1053 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); 1054 buffer_free(&m); 1055 } 1056 1057 int 1058 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) 1059 { 1060 Buffer m; 1061 Key *key; 1062 u_char *blob; 1063 u_int blen; 1064 int allowed = 0, have_forced = 0; 1065 1066 debug3("%s entering", __func__); 1067 1068 buffer_init(&m); 1069 buffer_put_bignum2(&m, client_n); 1070 1071 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); 1072 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); 1073 1074 allowed = buffer_get_int(&m); 1075 1076 /* fake forced command */ 1077 auth_clear_options(); 1078 have_forced = buffer_get_int(&m); 1079 forced_command = have_forced ? xstrdup("true") : NULL; 1080 1081 if (allowed && rkey != NULL) { 1082 blob = buffer_get_string(&m, &blen); 1083 if ((key = key_from_blob(blob, blen)) == NULL) 1084 fatal("%s: key_from_blob failed", __func__); 1085 *rkey = key; 1086 xfree(blob); 1087 } 1088 mm_send_debug(&m); 1089 buffer_free(&m); 1090 1091 return (allowed); 1092 } 1093 1094 BIGNUM * 1095 mm_auth_rsa_generate_challenge(Key *key) 1096 { 1097 Buffer m; 1098 BIGNUM *challenge; 1099 u_char *blob; 1100 u_int blen; 1101 1102 debug3("%s entering", __func__); 1103 1104 if ((challenge = BN_new()) == NULL) 1105 fatal("%s: BN_new failed", __func__); 1106 1107 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1108 if (key_to_blob(key, &blob, &blen) == 0) 1109 fatal("%s: key_to_blob failed", __func__); 1110 key->type = KEY_RSA1; 1111 1112 buffer_init(&m); 1113 buffer_put_string(&m, blob, blen); 1114 xfree(blob); 1115 1116 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); 1117 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); 1118 1119 buffer_get_bignum2(&m, challenge); 1120 buffer_free(&m); 1121 1122 return (challenge); 1123 } 1124 1125 int 1126 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) 1127 { 1128 Buffer m; 1129 u_char *blob; 1130 u_int blen; 1131 int success = 0; 1132 1133 debug3("%s entering", __func__); 1134 1135 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1136 if (key_to_blob(key, &blob, &blen) == 0) 1137 fatal("%s: key_to_blob failed", __func__); 1138 key->type = KEY_RSA1; 1139 1140 buffer_init(&m); 1141 buffer_put_string(&m, blob, blen); 1142 buffer_put_string(&m, response, 16); 1143 xfree(blob); 1144 1145 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); 1146 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); 1147 1148 success = buffer_get_int(&m); 1149 buffer_free(&m); 1150 1151 return (success); 1152 } 1153 1154 #ifdef SSH_AUDIT_EVENTS 1155 void 1156 mm_audit_event(ssh_audit_event_t event) 1157 { 1158 Buffer m; 1159 1160 debug3("%s entering", __func__); 1161 1162 buffer_init(&m); 1163 buffer_put_int(&m, event); 1164 1165 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); 1166 buffer_free(&m); 1167 } 1168 1169 void 1170 mm_audit_run_command(const char *command) 1171 { 1172 Buffer m; 1173 1174 debug3("%s entering command %s", __func__, command); 1175 1176 buffer_init(&m); 1177 buffer_put_cstring(&m, command); 1178 1179 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); 1180 buffer_free(&m); 1181 } 1182 #endif /* SSH_AUDIT_EVENTS */ 1183 1184 #ifdef GSSAPI 1185 OM_uint32 1186 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 1187 { 1188 Buffer m; 1189 OM_uint32 major; 1190 1191 /* Client doesn't get to see the context */ 1192 *ctx = NULL; 1193 1194 buffer_init(&m); 1195 buffer_put_string(&m, goid->elements, goid->length); 1196 1197 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 1198 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 1199 1200 major = buffer_get_int(&m); 1201 1202 buffer_free(&m); 1203 return (major); 1204 } 1205 1206 OM_uint32 1207 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 1208 gss_buffer_desc *out, OM_uint32 *flags) 1209 { 1210 Buffer m; 1211 OM_uint32 major; 1212 u_int len; 1213 1214 buffer_init(&m); 1215 buffer_put_string(&m, in->value, in->length); 1216 1217 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 1218 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 1219 1220 major = buffer_get_int(&m); 1221 out->value = buffer_get_string(&m, &len); 1222 out->length = len; 1223 if (flags) 1224 *flags = buffer_get_int(&m); 1225 1226 buffer_free(&m); 1227 1228 return (major); 1229 } 1230 1231 OM_uint32 1232 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 1233 { 1234 Buffer m; 1235 OM_uint32 major; 1236 1237 buffer_init(&m); 1238 buffer_put_string(&m, gssbuf->value, gssbuf->length); 1239 buffer_put_string(&m, gssmic->value, gssmic->length); 1240 1241 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 1242 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 1243 &m); 1244 1245 major = buffer_get_int(&m); 1246 buffer_free(&m); 1247 return(major); 1248 } 1249 1250 int 1251 mm_ssh_gssapi_userok(char *user) 1252 { 1253 Buffer m; 1254 int authenticated = 0; 1255 1256 buffer_init(&m); 1257 1258 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 1259 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 1260 &m); 1261 1262 authenticated = buffer_get_int(&m); 1263 1264 buffer_free(&m); 1265 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 1266 return (authenticated); 1267 } 1268 #endif /* GSSAPI */ 1269 1270 #ifdef JPAKE 1271 void 1272 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, 1273 char **hash_scheme, char **salt) 1274 { 1275 Buffer m; 1276 1277 debug3("%s entering", __func__); 1278 1279 buffer_init(&m); 1280 mm_request_send(pmonitor->m_recvfd, 1281 MONITOR_REQ_JPAKE_GET_PWDATA, &m); 1282 1283 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); 1284 mm_request_receive_expect(pmonitor->m_recvfd, 1285 MONITOR_ANS_JPAKE_GET_PWDATA, &m); 1286 1287 *hash_scheme = buffer_get_string(&m, NULL); 1288 *salt = buffer_get_string(&m, NULL); 1289 1290 buffer_free(&m); 1291 } 1292 1293 void 1294 mm_jpake_step1(struct modp_group *grp, 1295 u_char **id, u_int *id_len, 1296 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, 1297 u_char **priv1_proof, u_int *priv1_proof_len, 1298 u_char **priv2_proof, u_int *priv2_proof_len) 1299 { 1300 Buffer m; 1301 1302 debug3("%s entering", __func__); 1303 1304 buffer_init(&m); 1305 mm_request_send(pmonitor->m_recvfd, 1306 MONITOR_REQ_JPAKE_STEP1, &m); 1307 1308 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); 1309 mm_request_receive_expect(pmonitor->m_recvfd, 1310 MONITOR_ANS_JPAKE_STEP1, &m); 1311 1312 if ((*priv1 = BN_new()) == NULL || 1313 (*priv2 = BN_new()) == NULL || 1314 (*g_priv1 = BN_new()) == NULL || 1315 (*g_priv2 = BN_new()) == NULL) 1316 fatal("%s: BN_new", __func__); 1317 1318 *id = buffer_get_string(&m, id_len); 1319 /* priv1 and priv2 are, well, private */ 1320 buffer_get_bignum2(&m, *g_priv1); 1321 buffer_get_bignum2(&m, *g_priv2); 1322 *priv1_proof = buffer_get_string(&m, priv1_proof_len); 1323 *priv2_proof = buffer_get_string(&m, priv2_proof_len); 1324 1325 buffer_free(&m); 1326 } 1327 1328 void 1329 mm_jpake_step2(struct modp_group *grp, BIGNUM *s, 1330 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, 1331 const u_char *theirid, u_int theirid_len, 1332 const u_char *myid, u_int myid_len, 1333 const u_char *theirpub1_proof, u_int theirpub1_proof_len, 1334 const u_char *theirpub2_proof, u_int theirpub2_proof_len, 1335 BIGNUM **newpub, 1336 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) 1337 { 1338 Buffer m; 1339 1340 debug3("%s entering", __func__); 1341 1342 buffer_init(&m); 1343 /* monitor already has all bignums except theirpub1, theirpub2 */ 1344 buffer_put_bignum2(&m, theirpub1); 1345 buffer_put_bignum2(&m, theirpub2); 1346 /* monitor already knows our id */ 1347 buffer_put_string(&m, theirid, theirid_len); 1348 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); 1349 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); 1350 1351 mm_request_send(pmonitor->m_recvfd, 1352 MONITOR_REQ_JPAKE_STEP2, &m); 1353 1354 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); 1355 mm_request_receive_expect(pmonitor->m_recvfd, 1356 MONITOR_ANS_JPAKE_STEP2, &m); 1357 1358 if ((*newpub = BN_new()) == NULL) 1359 fatal("%s: BN_new", __func__); 1360 1361 buffer_get_bignum2(&m, *newpub); 1362 *newpub_exponent_proof = buffer_get_string(&m, 1363 newpub_exponent_proof_len); 1364 1365 buffer_free(&m); 1366 } 1367 1368 void 1369 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val, 1370 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, 1371 BIGNUM *theirpub1, BIGNUM *theirpub2, 1372 const u_char *my_id, u_int my_id_len, 1373 const u_char *their_id, u_int their_id_len, 1374 const u_char *sess_id, u_int sess_id_len, 1375 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, 1376 BIGNUM **k, 1377 u_char **confirm_hash, u_int *confirm_hash_len) 1378 { 1379 Buffer m; 1380 1381 debug3("%s entering", __func__); 1382 1383 buffer_init(&m); 1384 /* monitor already has all bignums except step2_val */ 1385 buffer_put_bignum2(&m, step2_val); 1386 /* monitor already knows all the ids */ 1387 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); 1388 1389 mm_request_send(pmonitor->m_recvfd, 1390 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); 1391 1392 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); 1393 mm_request_receive_expect(pmonitor->m_recvfd, 1394 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); 1395 1396 /* 'k' is sensitive and stays in the monitor */ 1397 *confirm_hash = buffer_get_string(&m, confirm_hash_len); 1398 1399 buffer_free(&m); 1400 } 1401 1402 int 1403 mm_jpake_check_confirm(const BIGNUM *k, 1404 const u_char *peer_id, u_int peer_id_len, 1405 const u_char *sess_id, u_int sess_id_len, 1406 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) 1407 { 1408 Buffer m; 1409 int success = 0; 1410 1411 debug3("%s entering", __func__); 1412 1413 buffer_init(&m); 1414 /* k is dummy in slave, ignored */ 1415 /* monitor knows all the ids */ 1416 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); 1417 mm_request_send(pmonitor->m_recvfd, 1418 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); 1419 1420 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); 1421 mm_request_receive_expect(pmonitor->m_recvfd, 1422 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); 1423 1424 success = buffer_get_int(&m); 1425 buffer_free(&m); 1426 1427 debug3("%s: success = %d", __func__, success); 1428 return success; 1429 } 1430 #endif /* JPAKE */ 1431