monitor_wrap.c revision 258343
1/* $OpenBSD: monitor_wrap.c,v 1.77 2013/11/06 16:52:11 markus Exp $ */ 2/* 3 * Copyright 2002 Niels Provos <provos@citi.umich.edu> 4 * Copyright 2002 Markus Friedl <markus@openbsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include "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 */ 84extern int compat20; 85extern z_stream incoming_stream; 86extern z_stream outgoing_stream; 87extern struct monitor *pmonitor; 88extern Buffer loginmsg; 89extern ServerOptions options; 90 91void 92mm_log_handler(LogLevel level, const char *msg, void *ctx) 93{ 94 Buffer log_msg; 95 struct monitor *mon = (struct monitor *)ctx; 96 97 if (mon->m_log_sendfd == -1) 98 fatal("%s: no log channel", __func__); 99 100 buffer_init(&log_msg); 101 /* 102 * Placeholder for packet length. Will be filled in with the actual 103 * packet length once the packet has been constucted. This saves 104 * fragile math. 105 */ 106 buffer_put_int(&log_msg, 0); 107 108 buffer_put_int(&log_msg, level); 109 buffer_put_cstring(&log_msg, msg); 110 put_u32(buffer_ptr(&log_msg), buffer_len(&log_msg) - 4); 111 if (atomicio(vwrite, mon->m_log_sendfd, buffer_ptr(&log_msg), 112 buffer_len(&log_msg)) != buffer_len(&log_msg)) 113 fatal("%s: write: %s", __func__, strerror(errno)); 114 buffer_free(&log_msg); 115} 116 117int 118mm_is_monitor(void) 119{ 120 /* 121 * m_pid is only set in the privileged part, and 122 * points to the unprivileged child. 123 */ 124 return (pmonitor && pmonitor->m_pid > 0); 125} 126 127void 128mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) 129{ 130 u_int mlen = buffer_len(m); 131 u_char buf[5]; 132 133 debug3("%s entering: type %d", __func__, type); 134 135 put_u32(buf, mlen + 1); 136 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ 137 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) 138 fatal("%s: write: %s", __func__, strerror(errno)); 139 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) 140 fatal("%s: write: %s", __func__, strerror(errno)); 141} 142 143void 144mm_request_receive(int sock, Buffer *m) 145{ 146 u_char buf[4]; 147 u_int msg_len; 148 149 debug3("%s entering", __func__); 150 151 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { 152 if (errno == EPIPE) 153 cleanup_exit(255); 154 fatal("%s: read: %s", __func__, strerror(errno)); 155 } 156 msg_len = get_u32(buf); 157 if (msg_len > 256 * 1024) 158 fatal("%s: read: bad msg_len %d", __func__, msg_len); 159 buffer_clear(m); 160 buffer_append_space(m, msg_len); 161 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) 162 fatal("%s: read: %s", __func__, strerror(errno)); 163} 164 165void 166mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) 167{ 168 u_char rtype; 169 170 debug3("%s entering: type %d", __func__, type); 171 172 mm_request_receive(sock, m); 173 rtype = buffer_get_char(m); 174 if (rtype != type) 175 fatal("%s: read: rtype %d != type %d", __func__, 176 rtype, type); 177} 178 179DH * 180mm_choose_dh(int min, int nbits, int max) 181{ 182 BIGNUM *p, *g; 183 int success = 0; 184 Buffer m; 185 186 buffer_init(&m); 187 buffer_put_int(&m, min); 188 buffer_put_int(&m, nbits); 189 buffer_put_int(&m, max); 190 191 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); 192 193 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); 194 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); 195 196 success = buffer_get_char(&m); 197 if (success == 0) 198 fatal("%s: MONITOR_ANS_MODULI failed", __func__); 199 200 if ((p = BN_new()) == NULL) 201 fatal("%s: BN_new failed", __func__); 202 if ((g = BN_new()) == NULL) 203 fatal("%s: BN_new failed", __func__); 204 buffer_get_bignum2(&m, p); 205 buffer_get_bignum2(&m, g); 206 207 debug3("%s: remaining %d", __func__, buffer_len(&m)); 208 buffer_free(&m); 209 210 return (dh_new_group(g, p)); 211} 212 213int 214mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) 215{ 216 Kex *kex = *pmonitor->m_pkex; 217 Buffer m; 218 219 debug3("%s entering", __func__); 220 221 buffer_init(&m); 222 buffer_put_int(&m, kex->host_key_index(key)); 223 buffer_put_string(&m, data, datalen); 224 225 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); 226 227 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); 228 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); 229 *sigp = buffer_get_string(&m, lenp); 230 buffer_free(&m); 231 232 return (0); 233} 234 235struct passwd * 236mm_getpwnamallow(const char *username) 237{ 238 Buffer m; 239 struct passwd *pw; 240 u_int len, i; 241 ServerOptions *newopts; 242 243 debug3("%s entering", __func__); 244 245 buffer_init(&m); 246 buffer_put_cstring(&m, username); 247 248 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); 249 250 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); 251 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); 252 253 if (buffer_get_char(&m) == 0) { 254 pw = NULL; 255 goto out; 256 } 257 pw = buffer_get_string(&m, &len); 258 if (len != sizeof(struct passwd)) 259 fatal("%s: struct passwd size mismatch", __func__); 260 pw->pw_name = buffer_get_string(&m, NULL); 261 pw->pw_passwd = buffer_get_string(&m, NULL); 262#ifdef HAVE_STRUCT_PASSWD_PW_GECOS 263 pw->pw_gecos = buffer_get_string(&m, NULL); 264#endif 265#ifdef HAVE_STRUCT_PASSWD_PW_CLASS 266 pw->pw_class = buffer_get_string(&m, NULL); 267#endif 268 pw->pw_dir = buffer_get_string(&m, NULL); 269 pw->pw_shell = buffer_get_string(&m, NULL); 270 271out: 272 /* copy options block as a Match directive may have changed some */ 273 newopts = buffer_get_string(&m, &len); 274 if (len != sizeof(*newopts)) 275 fatal("%s: option block size mismatch", __func__); 276 277#define M_CP_STROPT(x) do { \ 278 if (newopts->x != NULL) \ 279 newopts->x = buffer_get_string(&m, NULL); \ 280 } while (0) 281#define M_CP_STRARRAYOPT(x, nx) do { \ 282 for (i = 0; i < newopts->nx; i++) \ 283 newopts->x[i] = buffer_get_string(&m, NULL); \ 284 } while (0) 285 /* See comment in servconf.h */ 286 COPY_MATCH_STRING_OPTS(); 287#undef M_CP_STROPT 288#undef M_CP_STRARRAYOPT 289 290 copy_set_server_options(&options, newopts, 1); 291 free(newopts); 292 293 buffer_free(&m); 294 295 return (pw); 296} 297 298char * 299mm_auth2_read_banner(void) 300{ 301 Buffer m; 302 char *banner; 303 304 debug3("%s entering", __func__); 305 306 buffer_init(&m); 307 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 308 buffer_clear(&m); 309 310 mm_request_receive_expect(pmonitor->m_recvfd, 311 MONITOR_ANS_AUTH2_READ_BANNER, &m); 312 banner = buffer_get_string(&m, NULL); 313 buffer_free(&m); 314 315 /* treat empty banner as missing banner */ 316 if (strlen(banner) == 0) { 317 free(banner); 318 banner = NULL; 319 } 320 return (banner); 321} 322 323/* Inform the privileged process about service and style */ 324 325void 326mm_inform_authserv(char *service, char *style) 327{ 328 Buffer m; 329 330 debug3("%s entering", __func__); 331 332 buffer_init(&m); 333 buffer_put_cstring(&m, service); 334 buffer_put_cstring(&m, style ? style : ""); 335 336 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 337 338 buffer_free(&m); 339} 340 341/* Do the password authentication */ 342int 343mm_auth_password(Authctxt *authctxt, char *password) 344{ 345 Buffer m; 346 int authenticated = 0; 347 348 debug3("%s entering", __func__); 349 350 buffer_init(&m); 351 buffer_put_cstring(&m, password); 352 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 353 354 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 355 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 356 357 authenticated = buffer_get_int(&m); 358 359 buffer_free(&m); 360 361 debug3("%s: user %sauthenticated", 362 __func__, authenticated ? "" : "not "); 363 return (authenticated); 364} 365 366int 367mm_user_key_allowed(struct passwd *pw, Key *key) 368{ 369 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); 370} 371 372int 373mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, 374 Key *key) 375{ 376 return (mm_key_allowed(MM_HOSTKEY, user, host, key)); 377} 378 379int 380mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, 381 char *host, Key *key) 382{ 383 int ret; 384 385 key->type = KEY_RSA; /* XXX hack for key_to_blob */ 386 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); 387 key->type = KEY_RSA1; 388 return (ret); 389} 390 391int 392mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) 393{ 394 Buffer m; 395 u_char *blob; 396 u_int len; 397 int allowed = 0, have_forced = 0; 398 399 debug3("%s entering", __func__); 400 401 /* Convert the key to a blob and the pass it over */ 402 if (!key_to_blob(key, &blob, &len)) 403 return (0); 404 405 buffer_init(&m); 406 buffer_put_int(&m, type); 407 buffer_put_cstring(&m, user ? user : ""); 408 buffer_put_cstring(&m, host ? host : ""); 409 buffer_put_string(&m, blob, len); 410 free(blob); 411 412 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 413 414 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 415 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 416 417 allowed = buffer_get_int(&m); 418 419 /* fake forced command */ 420 auth_clear_options(); 421 have_forced = buffer_get_int(&m); 422 forced_command = have_forced ? xstrdup("true") : NULL; 423 424 buffer_free(&m); 425 426 return (allowed); 427} 428 429/* 430 * This key verify needs to send the key type along, because the 431 * privileged parent makes the decision if the key is allowed 432 * for authentication. 433 */ 434 435int 436mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) 437{ 438 Buffer m; 439 u_char *blob; 440 u_int len; 441 int verified = 0; 442 443 debug3("%s entering", __func__); 444 445 /* Convert the key to a blob and the pass it over */ 446 if (!key_to_blob(key, &blob, &len)) 447 return (0); 448 449 buffer_init(&m); 450 buffer_put_string(&m, blob, len); 451 buffer_put_string(&m, sig, siglen); 452 buffer_put_string(&m, data, datalen); 453 free(blob); 454 455 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 456 457 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 458 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 459 460 verified = buffer_get_int(&m); 461 462 buffer_free(&m); 463 464 return (verified); 465} 466 467/* Export key state after authentication */ 468Newkeys * 469mm_newkeys_from_blob(u_char *blob, int blen) 470{ 471 Buffer b; 472 u_int len; 473 Newkeys *newkey = NULL; 474 Enc *enc; 475 Mac *mac; 476 Comp *comp; 477 478 debug3("%s: %p(%d)", __func__, blob, blen); 479#ifdef DEBUG_PK 480 dump_base64(stderr, blob, blen); 481#endif 482 buffer_init(&b); 483 buffer_append(&b, blob, blen); 484 485 newkey = xcalloc(1, sizeof(*newkey)); 486 enc = &newkey->enc; 487 mac = &newkey->mac; 488 comp = &newkey->comp; 489 490 /* Enc structure */ 491 enc->name = buffer_get_string(&b, NULL); 492 buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); 493 enc->enabled = buffer_get_int(&b); 494 enc->block_size = buffer_get_int(&b); 495 enc->key = buffer_get_string(&b, &enc->key_len); 496 enc->iv = buffer_get_string(&b, &enc->iv_len); 497 498 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) 499 fatal("%s: bad cipher name %s or pointer %p", __func__, 500 enc->name, enc->cipher); 501 502 /* Mac structure */ 503 if (cipher_authlen(enc->cipher) == 0) { 504 mac->name = buffer_get_string(&b, NULL); 505 if (mac->name == NULL || mac_setup(mac, mac->name) == -1) 506 fatal("%s: can not setup mac %s", __func__, mac->name); 507 mac->enabled = buffer_get_int(&b); 508 mac->key = buffer_get_string(&b, &len); 509 if (len > mac->key_len) 510 fatal("%s: bad mac key length: %u > %d", __func__, len, 511 mac->key_len); 512 mac->key_len = len; 513 } 514 515 /* Comp structure */ 516 comp->type = buffer_get_int(&b); 517 comp->enabled = buffer_get_int(&b); 518 comp->name = buffer_get_string(&b, NULL); 519 520 len = buffer_len(&b); 521 if (len != 0) 522 error("newkeys_from_blob: remaining bytes in blob %u", len); 523 buffer_free(&b); 524 return (newkey); 525} 526 527int 528mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) 529{ 530 Buffer b; 531 int len; 532 Enc *enc; 533 Mac *mac; 534 Comp *comp; 535 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode); 536 537 debug3("%s: converting %p", __func__, newkey); 538 539 if (newkey == NULL) { 540 error("%s: newkey == NULL", __func__); 541 return 0; 542 } 543 enc = &newkey->enc; 544 mac = &newkey->mac; 545 comp = &newkey->comp; 546 547 buffer_init(&b); 548 /* Enc structure */ 549 buffer_put_cstring(&b, enc->name); 550 /* The cipher struct is constant and shared, you export pointer */ 551 buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); 552 buffer_put_int(&b, enc->enabled); 553 buffer_put_int(&b, enc->block_size); 554 buffer_put_string(&b, enc->key, enc->key_len); 555 packet_get_keyiv(mode, enc->iv, enc->iv_len); 556 buffer_put_string(&b, enc->iv, enc->iv_len); 557 558 /* Mac structure */ 559 if (cipher_authlen(enc->cipher) == 0) { 560 buffer_put_cstring(&b, mac->name); 561 buffer_put_int(&b, mac->enabled); 562 buffer_put_string(&b, mac->key, mac->key_len); 563 } 564 565 /* Comp structure */ 566 buffer_put_int(&b, comp->type); 567 buffer_put_int(&b, comp->enabled); 568 buffer_put_cstring(&b, comp->name); 569 570 len = buffer_len(&b); 571 if (lenp != NULL) 572 *lenp = len; 573 if (blobp != NULL) { 574 *blobp = xmalloc(len); 575 memcpy(*blobp, buffer_ptr(&b), len); 576 } 577 memset(buffer_ptr(&b), 0, len); 578 buffer_free(&b); 579 return len; 580} 581 582static void 583mm_send_kex(Buffer *m, Kex *kex) 584{ 585 buffer_put_string(m, kex->session_id, kex->session_id_len); 586 buffer_put_int(m, kex->we_need); 587 buffer_put_int(m, kex->hostkey_type); 588 buffer_put_int(m, kex->kex_type); 589 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); 590 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); 591 buffer_put_int(m, kex->flags); 592 buffer_put_cstring(m, kex->client_version_string); 593 buffer_put_cstring(m, kex->server_version_string); 594} 595 596void 597mm_send_keystate(struct monitor *monitor) 598{ 599 Buffer m, *input, *output; 600 u_char *blob, *p; 601 u_int bloblen, plen; 602 u_int32_t seqnr, packets; 603 u_int64_t blocks, bytes; 604 605 buffer_init(&m); 606 607 if (!compat20) { 608 u_char iv[24]; 609 u_char *key; 610 u_int ivlen, keylen; 611 612 buffer_put_int(&m, packet_get_protocol_flags()); 613 614 buffer_put_int(&m, packet_get_ssh1_cipher()); 615 616 debug3("%s: Sending ssh1 KEY+IV", __func__); 617 keylen = packet_get_encryption_key(NULL); 618 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ 619 keylen = packet_get_encryption_key(key); 620 buffer_put_string(&m, key, keylen); 621 memset(key, 0, keylen); 622 free(key); 623 624 ivlen = packet_get_keyiv_len(MODE_OUT); 625 packet_get_keyiv(MODE_OUT, iv, ivlen); 626 buffer_put_string(&m, iv, ivlen); 627 ivlen = packet_get_keyiv_len(MODE_IN); 628 packet_get_keyiv(MODE_IN, iv, ivlen); 629 buffer_put_string(&m, iv, ivlen); 630 goto skip; 631 } else { 632 /* Kex for rekeying */ 633 mm_send_kex(&m, *monitor->m_pkex); 634 } 635 636 debug3("%s: Sending new keys: %p %p", 637 __func__, packet_get_newkeys(MODE_OUT), 638 packet_get_newkeys(MODE_IN)); 639 640 /* Keys from Kex */ 641 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) 642 fatal("%s: conversion of newkeys failed", __func__); 643 644 buffer_put_string(&m, blob, bloblen); 645 free(blob); 646 647 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) 648 fatal("%s: conversion of newkeys failed", __func__); 649 650 buffer_put_string(&m, blob, bloblen); 651 free(blob); 652 653 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); 654 buffer_put_int(&m, seqnr); 655 buffer_put_int64(&m, blocks); 656 buffer_put_int(&m, packets); 657 buffer_put_int64(&m, bytes); 658 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); 659 buffer_put_int(&m, seqnr); 660 buffer_put_int64(&m, blocks); 661 buffer_put_int(&m, packets); 662 buffer_put_int64(&m, bytes); 663 664 debug3("%s: New keys have been sent", __func__); 665 skip: 666 /* More key context */ 667 plen = packet_get_keycontext(MODE_OUT, NULL); 668 p = xmalloc(plen+1); 669 packet_get_keycontext(MODE_OUT, p); 670 buffer_put_string(&m, p, plen); 671 free(p); 672 673 plen = packet_get_keycontext(MODE_IN, NULL); 674 p = xmalloc(plen+1); 675 packet_get_keycontext(MODE_IN, p); 676 buffer_put_string(&m, p, plen); 677 free(p); 678 679 /* Compression state */ 680 debug3("%s: Sending compression state", __func__); 681 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); 682 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); 683 684 /* Network I/O buffers */ 685 input = (Buffer *)packet_get_input(); 686 output = (Buffer *)packet_get_output(); 687 buffer_put_string(&m, buffer_ptr(input), buffer_len(input)); 688 buffer_put_string(&m, buffer_ptr(output), buffer_len(output)); 689 690 /* Roaming */ 691 if (compat20) { 692 buffer_put_int64(&m, get_sent_bytes()); 693 buffer_put_int64(&m, get_recv_bytes()); 694 } 695 696 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); 697 debug3("%s: Finished sending state", __func__); 698 699 buffer_free(&m); 700} 701 702int 703mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 704{ 705 Buffer m; 706 char *p, *msg; 707 int success = 0, tmp1 = -1, tmp2 = -1; 708 709 /* Kludge: ensure there are fds free to receive the pty/tty */ 710 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 711 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 712 error("%s: cannot allocate fds for pty", __func__); 713 if (tmp1 > 0) 714 close(tmp1); 715 if (tmp2 > 0) 716 close(tmp2); 717 return 0; 718 } 719 close(tmp1); 720 close(tmp2); 721 722 buffer_init(&m); 723 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 724 725 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 726 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 727 728 success = buffer_get_int(&m); 729 if (success == 0) { 730 debug3("%s: pty alloc failed", __func__); 731 buffer_free(&m); 732 return (0); 733 } 734 p = buffer_get_string(&m, NULL); 735 msg = buffer_get_string(&m, NULL); 736 buffer_free(&m); 737 738 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 739 free(p); 740 741 buffer_append(&loginmsg, msg, strlen(msg)); 742 free(msg); 743 744 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 745 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 746 fatal("%s: receive fds failed", __func__); 747 748 /* Success */ 749 return (1); 750} 751 752void 753mm_session_pty_cleanup2(Session *s) 754{ 755 Buffer m; 756 757 if (s->ttyfd == -1) 758 return; 759 buffer_init(&m); 760 buffer_put_cstring(&m, s->tty); 761 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 762 buffer_free(&m); 763 764 /* closed dup'ed master */ 765 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 766 error("close(s->ptymaster/%d): %s", 767 s->ptymaster, strerror(errno)); 768 769 /* unlink pty from session */ 770 s->ttyfd = -1; 771} 772 773#ifdef USE_PAM 774void 775mm_start_pam(Authctxt *authctxt) 776{ 777 Buffer m; 778 779 debug3("%s entering", __func__); 780 if (!options.use_pam) 781 fatal("UsePAM=no, but ended up in %s anyway", __func__); 782 783 buffer_init(&m); 784 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); 785 786 buffer_free(&m); 787} 788 789u_int 790mm_do_pam_account(void) 791{ 792 Buffer m; 793 u_int ret; 794 char *msg; 795 796 debug3("%s entering", __func__); 797 if (!options.use_pam) 798 fatal("UsePAM=no, but ended up in %s anyway", __func__); 799 800 buffer_init(&m); 801 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); 802 803 mm_request_receive_expect(pmonitor->m_recvfd, 804 MONITOR_ANS_PAM_ACCOUNT, &m); 805 ret = buffer_get_int(&m); 806 msg = buffer_get_string(&m, NULL); 807 buffer_append(&loginmsg, msg, strlen(msg)); 808 free(msg); 809 810 buffer_free(&m); 811 812 debug3("%s returning %d", __func__, ret); 813 814 return (ret); 815} 816 817void * 818mm_sshpam_init_ctx(Authctxt *authctxt) 819{ 820 Buffer m; 821 int success; 822 823 debug3("%s", __func__); 824 buffer_init(&m); 825 buffer_put_cstring(&m, authctxt->user); 826 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); 827 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); 828 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); 829 success = buffer_get_int(&m); 830 if (success == 0) { 831 debug3("%s: pam_init_ctx failed", __func__); 832 buffer_free(&m); 833 return (NULL); 834 } 835 buffer_free(&m); 836 return (authctxt); 837} 838 839int 840mm_sshpam_query(void *ctx, char **name, char **info, 841 u_int *num, char ***prompts, u_int **echo_on) 842{ 843 Buffer m; 844 u_int i; 845 int ret; 846 847 debug3("%s", __func__); 848 buffer_init(&m); 849 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); 850 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); 851 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); 852 ret = buffer_get_int(&m); 853 debug3("%s: pam_query returned %d", __func__, ret); 854 *name = buffer_get_string(&m, NULL); 855 *info = buffer_get_string(&m, NULL); 856 *num = buffer_get_int(&m); 857 if (*num > PAM_MAX_NUM_MSG) 858 fatal("%s: recieved %u PAM messages, expected <= %u", 859 __func__, *num, PAM_MAX_NUM_MSG); 860 *prompts = xcalloc((*num + 1), sizeof(char *)); 861 *echo_on = xcalloc((*num + 1), sizeof(u_int)); 862 for (i = 0; i < *num; ++i) { 863 (*prompts)[i] = buffer_get_string(&m, NULL); 864 (*echo_on)[i] = buffer_get_int(&m); 865 } 866 buffer_free(&m); 867 return (ret); 868} 869 870int 871mm_sshpam_respond(void *ctx, u_int num, char **resp) 872{ 873 Buffer m; 874 u_int i; 875 int ret; 876 877 debug3("%s", __func__); 878 buffer_init(&m); 879 buffer_put_int(&m, num); 880 for (i = 0; i < num; ++i) 881 buffer_put_cstring(&m, resp[i]); 882 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); 883 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); 884 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); 885 ret = buffer_get_int(&m); 886 debug3("%s: pam_respond returned %d", __func__, ret); 887 buffer_free(&m); 888 return (ret); 889} 890 891void 892mm_sshpam_free_ctx(void *ctxtp) 893{ 894 Buffer m; 895 896 debug3("%s", __func__); 897 buffer_init(&m); 898 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); 899 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); 900 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); 901 buffer_free(&m); 902} 903#endif /* USE_PAM */ 904 905/* Request process termination */ 906 907void 908mm_terminate(void) 909{ 910 Buffer m; 911 912 buffer_init(&m); 913 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 914 buffer_free(&m); 915} 916 917int 918mm_ssh1_session_key(BIGNUM *num) 919{ 920 int rsafail; 921 Buffer m; 922 923 buffer_init(&m); 924 buffer_put_bignum2(&m, num); 925 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); 926 927 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); 928 929 rsafail = buffer_get_int(&m); 930 buffer_get_bignum2(&m, num); 931 932 buffer_free(&m); 933 934 return (rsafail); 935} 936 937static void 938mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 939 char ***prompts, u_int **echo_on) 940{ 941 *name = xstrdup(""); 942 *infotxt = xstrdup(""); 943 *numprompts = 1; 944 *prompts = xcalloc(*numprompts, sizeof(char *)); 945 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 946 (*echo_on)[0] = 0; 947} 948 949int 950mm_bsdauth_query(void *ctx, char **name, char **infotxt, 951 u_int *numprompts, char ***prompts, u_int **echo_on) 952{ 953 Buffer m; 954 u_int success; 955 char *challenge; 956 957 debug3("%s: entering", __func__); 958 959 buffer_init(&m); 960 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 961 962 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 963 &m); 964 success = buffer_get_int(&m); 965 if (success == 0) { 966 debug3("%s: no challenge", __func__); 967 buffer_free(&m); 968 return (-1); 969 } 970 971 /* Get the challenge, and format the response */ 972 challenge = buffer_get_string(&m, NULL); 973 buffer_free(&m); 974 975 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 976 (*prompts)[0] = challenge; 977 978 debug3("%s: received challenge: %s", __func__, challenge); 979 980 return (0); 981} 982 983int 984mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 985{ 986 Buffer m; 987 int authok; 988 989 debug3("%s: entering", __func__); 990 if (numresponses != 1) 991 return (-1); 992 993 buffer_init(&m); 994 buffer_put_cstring(&m, responses[0]); 995 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 996 997 mm_request_receive_expect(pmonitor->m_recvfd, 998 MONITOR_ANS_BSDAUTHRESPOND, &m); 999 1000 authok = buffer_get_int(&m); 1001 buffer_free(&m); 1002 1003 return ((authok == 0) ? -1 : 0); 1004} 1005 1006#ifdef SKEY 1007int 1008mm_skey_query(void *ctx, char **name, char **infotxt, 1009 u_int *numprompts, char ***prompts, u_int **echo_on) 1010{ 1011 Buffer m; 1012 u_int success; 1013 char *challenge; 1014 1015 debug3("%s: entering", __func__); 1016 1017 buffer_init(&m); 1018 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); 1019 1020 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, 1021 &m); 1022 success = buffer_get_int(&m); 1023 if (success == 0) { 1024 debug3("%s: no challenge", __func__); 1025 buffer_free(&m); 1026 return (-1); 1027 } 1028 1029 /* Get the challenge, and format the response */ 1030 challenge = buffer_get_string(&m, NULL); 1031 buffer_free(&m); 1032 1033 debug3("%s: received challenge: %s", __func__, challenge); 1034 1035 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 1036 1037 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); 1038 free(challenge); 1039 1040 return (0); 1041} 1042 1043int 1044mm_skey_respond(void *ctx, u_int numresponses, char **responses) 1045{ 1046 Buffer m; 1047 int authok; 1048 1049 debug3("%s: entering", __func__); 1050 if (numresponses != 1) 1051 return (-1); 1052 1053 buffer_init(&m); 1054 buffer_put_cstring(&m, responses[0]); 1055 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); 1056 1057 mm_request_receive_expect(pmonitor->m_recvfd, 1058 MONITOR_ANS_SKEYRESPOND, &m); 1059 1060 authok = buffer_get_int(&m); 1061 buffer_free(&m); 1062 1063 return ((authok == 0) ? -1 : 0); 1064} 1065#endif /* SKEY */ 1066 1067void 1068mm_ssh1_session_id(u_char session_id[16]) 1069{ 1070 Buffer m; 1071 int i; 1072 1073 debug3("%s entering", __func__); 1074 1075 buffer_init(&m); 1076 for (i = 0; i < 16; i++) 1077 buffer_put_char(&m, session_id[i]); 1078 1079 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); 1080 buffer_free(&m); 1081} 1082 1083int 1084mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) 1085{ 1086 Buffer m; 1087 Key *key; 1088 u_char *blob; 1089 u_int blen; 1090 int allowed = 0, have_forced = 0; 1091 1092 debug3("%s entering", __func__); 1093 1094 buffer_init(&m); 1095 buffer_put_bignum2(&m, client_n); 1096 1097 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); 1098 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); 1099 1100 allowed = buffer_get_int(&m); 1101 1102 /* fake forced command */ 1103 auth_clear_options(); 1104 have_forced = buffer_get_int(&m); 1105 forced_command = have_forced ? xstrdup("true") : NULL; 1106 1107 if (allowed && rkey != NULL) { 1108 blob = buffer_get_string(&m, &blen); 1109 if ((key = key_from_blob(blob, blen)) == NULL) 1110 fatal("%s: key_from_blob failed", __func__); 1111 *rkey = key; 1112 free(blob); 1113 } 1114 buffer_free(&m); 1115 1116 return (allowed); 1117} 1118 1119BIGNUM * 1120mm_auth_rsa_generate_challenge(Key *key) 1121{ 1122 Buffer m; 1123 BIGNUM *challenge; 1124 u_char *blob; 1125 u_int blen; 1126 1127 debug3("%s entering", __func__); 1128 1129 if ((challenge = BN_new()) == NULL) 1130 fatal("%s: BN_new failed", __func__); 1131 1132 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1133 if (key_to_blob(key, &blob, &blen) == 0) 1134 fatal("%s: key_to_blob failed", __func__); 1135 key->type = KEY_RSA1; 1136 1137 buffer_init(&m); 1138 buffer_put_string(&m, blob, blen); 1139 free(blob); 1140 1141 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); 1142 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); 1143 1144 buffer_get_bignum2(&m, challenge); 1145 buffer_free(&m); 1146 1147 return (challenge); 1148} 1149 1150int 1151mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) 1152{ 1153 Buffer m; 1154 u_char *blob; 1155 u_int blen; 1156 int success = 0; 1157 1158 debug3("%s entering", __func__); 1159 1160 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1161 if (key_to_blob(key, &blob, &blen) == 0) 1162 fatal("%s: key_to_blob failed", __func__); 1163 key->type = KEY_RSA1; 1164 1165 buffer_init(&m); 1166 buffer_put_string(&m, blob, blen); 1167 buffer_put_string(&m, response, 16); 1168 free(blob); 1169 1170 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); 1171 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); 1172 1173 success = buffer_get_int(&m); 1174 buffer_free(&m); 1175 1176 return (success); 1177} 1178 1179#ifdef SSH_AUDIT_EVENTS 1180void 1181mm_audit_event(ssh_audit_event_t event) 1182{ 1183 Buffer m; 1184 1185 debug3("%s entering", __func__); 1186 1187 buffer_init(&m); 1188 buffer_put_int(&m, event); 1189 1190 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); 1191 buffer_free(&m); 1192} 1193 1194void 1195mm_audit_run_command(const char *command) 1196{ 1197 Buffer m; 1198 1199 debug3("%s entering command %s", __func__, command); 1200 1201 buffer_init(&m); 1202 buffer_put_cstring(&m, command); 1203 1204 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); 1205 buffer_free(&m); 1206} 1207#endif /* SSH_AUDIT_EVENTS */ 1208 1209#ifdef GSSAPI 1210OM_uint32 1211mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 1212{ 1213 Buffer m; 1214 OM_uint32 major; 1215 1216 /* Client doesn't get to see the context */ 1217 *ctx = NULL; 1218 1219 buffer_init(&m); 1220 buffer_put_string(&m, goid->elements, goid->length); 1221 1222 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 1223 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 1224 1225 major = buffer_get_int(&m); 1226 1227 buffer_free(&m); 1228 return (major); 1229} 1230 1231OM_uint32 1232mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 1233 gss_buffer_desc *out, OM_uint32 *flags) 1234{ 1235 Buffer m; 1236 OM_uint32 major; 1237 u_int len; 1238 1239 buffer_init(&m); 1240 buffer_put_string(&m, in->value, in->length); 1241 1242 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 1243 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 1244 1245 major = buffer_get_int(&m); 1246 out->value = buffer_get_string(&m, &len); 1247 out->length = len; 1248 if (flags) 1249 *flags = buffer_get_int(&m); 1250 1251 buffer_free(&m); 1252 1253 return (major); 1254} 1255 1256OM_uint32 1257mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 1258{ 1259 Buffer m; 1260 OM_uint32 major; 1261 1262 buffer_init(&m); 1263 buffer_put_string(&m, gssbuf->value, gssbuf->length); 1264 buffer_put_string(&m, gssmic->value, gssmic->length); 1265 1266 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 1267 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 1268 &m); 1269 1270 major = buffer_get_int(&m); 1271 buffer_free(&m); 1272 return(major); 1273} 1274 1275int 1276mm_ssh_gssapi_userok(char *user) 1277{ 1278 Buffer m; 1279 int authenticated = 0; 1280 1281 buffer_init(&m); 1282 1283 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 1284 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 1285 &m); 1286 1287 authenticated = buffer_get_int(&m); 1288 1289 buffer_free(&m); 1290 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 1291 return (authenticated); 1292} 1293#endif /* GSSAPI */ 1294 1295#ifdef JPAKE 1296void 1297mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, 1298 char **hash_scheme, char **salt) 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_GET_PWDATA, &m); 1307 1308 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); 1309 mm_request_receive_expect(pmonitor->m_recvfd, 1310 MONITOR_ANS_JPAKE_GET_PWDATA, &m); 1311 1312 *hash_scheme = buffer_get_string(&m, NULL); 1313 *salt = buffer_get_string(&m, NULL); 1314 1315 buffer_free(&m); 1316} 1317 1318void 1319mm_jpake_step1(struct modp_group *grp, 1320 u_char **id, u_int *id_len, 1321 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, 1322 u_char **priv1_proof, u_int *priv1_proof_len, 1323 u_char **priv2_proof, u_int *priv2_proof_len) 1324{ 1325 Buffer m; 1326 1327 debug3("%s entering", __func__); 1328 1329 buffer_init(&m); 1330 mm_request_send(pmonitor->m_recvfd, 1331 MONITOR_REQ_JPAKE_STEP1, &m); 1332 1333 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); 1334 mm_request_receive_expect(pmonitor->m_recvfd, 1335 MONITOR_ANS_JPAKE_STEP1, &m); 1336 1337 if ((*priv1 = BN_new()) == NULL || 1338 (*priv2 = BN_new()) == NULL || 1339 (*g_priv1 = BN_new()) == NULL || 1340 (*g_priv2 = BN_new()) == NULL) 1341 fatal("%s: BN_new", __func__); 1342 1343 *id = buffer_get_string(&m, id_len); 1344 /* priv1 and priv2 are, well, private */ 1345 buffer_get_bignum2(&m, *g_priv1); 1346 buffer_get_bignum2(&m, *g_priv2); 1347 *priv1_proof = buffer_get_string(&m, priv1_proof_len); 1348 *priv2_proof = buffer_get_string(&m, priv2_proof_len); 1349 1350 buffer_free(&m); 1351} 1352 1353void 1354mm_jpake_step2(struct modp_group *grp, BIGNUM *s, 1355 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, 1356 const u_char *theirid, u_int theirid_len, 1357 const u_char *myid, u_int myid_len, 1358 const u_char *theirpub1_proof, u_int theirpub1_proof_len, 1359 const u_char *theirpub2_proof, u_int theirpub2_proof_len, 1360 BIGNUM **newpub, 1361 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) 1362{ 1363 Buffer m; 1364 1365 debug3("%s entering", __func__); 1366 1367 buffer_init(&m); 1368 /* monitor already has all bignums except theirpub1, theirpub2 */ 1369 buffer_put_bignum2(&m, theirpub1); 1370 buffer_put_bignum2(&m, theirpub2); 1371 /* monitor already knows our id */ 1372 buffer_put_string(&m, theirid, theirid_len); 1373 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); 1374 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); 1375 1376 mm_request_send(pmonitor->m_recvfd, 1377 MONITOR_REQ_JPAKE_STEP2, &m); 1378 1379 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); 1380 mm_request_receive_expect(pmonitor->m_recvfd, 1381 MONITOR_ANS_JPAKE_STEP2, &m); 1382 1383 if ((*newpub = BN_new()) == NULL) 1384 fatal("%s: BN_new", __func__); 1385 1386 buffer_get_bignum2(&m, *newpub); 1387 *newpub_exponent_proof = buffer_get_string(&m, 1388 newpub_exponent_proof_len); 1389 1390 buffer_free(&m); 1391} 1392 1393void 1394mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val, 1395 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, 1396 BIGNUM *theirpub1, BIGNUM *theirpub2, 1397 const u_char *my_id, u_int my_id_len, 1398 const u_char *their_id, u_int their_id_len, 1399 const u_char *sess_id, u_int sess_id_len, 1400 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, 1401 BIGNUM **k, 1402 u_char **confirm_hash, u_int *confirm_hash_len) 1403{ 1404 Buffer m; 1405 1406 debug3("%s entering", __func__); 1407 1408 buffer_init(&m); 1409 /* monitor already has all bignums except step2_val */ 1410 buffer_put_bignum2(&m, step2_val); 1411 /* monitor already knows all the ids */ 1412 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); 1413 1414 mm_request_send(pmonitor->m_recvfd, 1415 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); 1416 1417 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); 1418 mm_request_receive_expect(pmonitor->m_recvfd, 1419 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); 1420 1421 /* 'k' is sensitive and stays in the monitor */ 1422 *confirm_hash = buffer_get_string(&m, confirm_hash_len); 1423 1424 buffer_free(&m); 1425} 1426 1427int 1428mm_jpake_check_confirm(const BIGNUM *k, 1429 const u_char *peer_id, u_int peer_id_len, 1430 const u_char *sess_id, u_int sess_id_len, 1431 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) 1432{ 1433 Buffer m; 1434 int success = 0; 1435 1436 debug3("%s entering", __func__); 1437 1438 buffer_init(&m); 1439 /* k is dummy in slave, ignored */ 1440 /* monitor knows all the ids */ 1441 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); 1442 mm_request_send(pmonitor->m_recvfd, 1443 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); 1444 1445 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); 1446 mm_request_receive_expect(pmonitor->m_recvfd, 1447 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); 1448 1449 success = buffer_get_int(&m); 1450 buffer_free(&m); 1451 1452 debug3("%s: success = %d", __func__, success); 1453 return success; 1454} 1455#endif /* JPAKE */ 1456