1/* $OpenBSD: monitor_wrap.c,v 1.75 2013/01/08 18:49:04 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#ifdef __APPLE_CRYPTO__ 42#include "ossl-bn.h" 43#include "ossl-dh.h" 44#include "ossl-evp.h" 45#else 46#include <openssl/bn.h> 47#include <openssl/dh.h> 48#include <openssl/evp.h> 49#endif 50 51#include "openbsd-compat/sys-queue.h" 52#include "xmalloc.h" 53#include "ssh.h" 54#include "dh.h" 55#include "buffer.h" 56#include "key.h" 57#include "cipher.h" 58#include "kex.h" 59#include "hostfile.h" 60#include "auth.h" 61#include "auth-options.h" 62#include "packet.h" 63#include "mac.h" 64#include "log.h" 65#ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ 66#undef TARGET_OS_MAC 67#include "zlib.h" 68#define TARGET_OS_MAC 1 69#else 70#include "zlib.h" 71#endif 72#include "monitor.h" 73#ifdef GSSAPI 74#include "ssh-gss.h" 75#endif 76#include "monitor_wrap.h" 77#include "atomicio.h" 78#include "monitor_fdpass.h" 79#include "misc.h" 80#include "schnorr.h" 81#include "jpake.h" 82#include "uuencode.h" 83 84#include "channels.h" 85#include "session.h" 86#include "servconf.h" 87#include "roaming.h" 88 89/* Imports */ 90extern int compat20; 91extern z_stream incoming_stream; 92extern z_stream outgoing_stream; 93extern struct monitor *pmonitor; 94extern Buffer loginmsg; 95extern ServerOptions options; 96 97void 98mm_log_handler(LogLevel level, const char *msg, void *ctx) 99{ 100 Buffer log_msg; 101 struct monitor *mon = (struct monitor *)ctx; 102 103 if (mon->m_log_sendfd == -1) 104 fatal("%s: no log channel", __func__); 105 106 buffer_init(&log_msg); 107 /* 108 * Placeholder for packet length. Will be filled in with the actual 109 * packet length once the packet has been constucted. This saves 110 * fragile math. 111 */ 112 buffer_put_int(&log_msg, 0); 113 114 buffer_put_int(&log_msg, level); 115 buffer_put_cstring(&log_msg, msg); 116 put_u32(buffer_ptr(&log_msg), buffer_len(&log_msg) - 4); 117 if (atomicio(vwrite, mon->m_log_sendfd, buffer_ptr(&log_msg), 118 buffer_len(&log_msg)) != buffer_len(&log_msg)) 119 fatal("%s: write: %s", __func__, strerror(errno)); 120 buffer_free(&log_msg); 121} 122 123int 124mm_is_monitor(void) 125{ 126 /* 127 * m_pid is only set in the privileged part, and 128 * points to the unprivileged child. 129 */ 130 return (pmonitor && pmonitor->m_pid > 0); 131} 132 133void 134mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) 135{ 136 u_int mlen = buffer_len(m); 137 u_char buf[5]; 138 139 debug3("%s entering: type %d", __func__, type); 140 141 put_u32(buf, mlen + 1); 142 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ 143 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) 144 fatal("%s: write: %s", __func__, strerror(errno)); 145 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) 146 fatal("%s: write: %s", __func__, strerror(errno)); 147} 148 149void 150mm_request_receive(int sock, Buffer *m) 151{ 152 u_char buf[4]; 153 u_int msg_len; 154 155 debug3("%s entering", __func__); 156 157 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { 158 if (errno == EPIPE) 159 cleanup_exit(255); 160 fatal("%s: read: %s", __func__, strerror(errno)); 161 } 162 msg_len = get_u32(buf); 163 if (msg_len > 256 * 1024) 164 fatal("%s: read: bad msg_len %d", __func__, msg_len); 165 buffer_clear(m); 166 buffer_append_space(m, msg_len); 167 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) 168 fatal("%s: read: %s", __func__, strerror(errno)); 169} 170 171void 172mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) 173{ 174 u_char rtype; 175 176 debug3("%s entering: type %d", __func__, type); 177 178 mm_request_receive(sock, m); 179 rtype = buffer_get_char(m); 180 if (rtype != type) 181 fatal("%s: read: rtype %d != type %d", __func__, 182 rtype, type); 183} 184 185DH * 186mm_choose_dh(int min, int nbits, int max) 187{ 188 BIGNUM *p, *g; 189 int success = 0; 190 Buffer m; 191 192 buffer_init(&m); 193 buffer_put_int(&m, min); 194 buffer_put_int(&m, nbits); 195 buffer_put_int(&m, max); 196 197 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); 198 199 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); 200 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); 201 202 success = buffer_get_char(&m); 203 if (success == 0) 204 fatal("%s: MONITOR_ANS_MODULI failed", __func__); 205 206 if ((p = BN_new()) == NULL) 207 fatal("%s: BN_new failed", __func__); 208 if ((g = BN_new()) == NULL) 209 fatal("%s: BN_new failed", __func__); 210 buffer_get_bignum2(&m, p); 211 buffer_get_bignum2(&m, g); 212 213 debug3("%s: remaining %d", __func__, buffer_len(&m)); 214 buffer_free(&m); 215 216 return (dh_new_group(g, p)); 217} 218 219int 220mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) 221{ 222 Kex *kex = *pmonitor->m_pkex; 223 Buffer m; 224 225 debug3("%s entering", __func__); 226 227 buffer_init(&m); 228 buffer_put_int(&m, kex->host_key_index(key)); 229 buffer_put_string(&m, data, datalen); 230 231 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); 232 233 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); 234 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); 235 *sigp = buffer_get_string(&m, lenp); 236 buffer_free(&m); 237 238 return (0); 239} 240 241struct passwd * 242mm_getpwnamallow(const char *username) 243{ 244 Buffer m; 245 struct passwd *pw; 246 u_int len, i; 247 ServerOptions *newopts; 248 249 debug3("%s entering", __func__); 250 251 buffer_init(&m); 252 buffer_put_cstring(&m, username); 253 254 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); 255 256 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); 257 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); 258 259 if (buffer_get_char(&m) == 0) { 260 pw = NULL; 261 goto out; 262 } 263 pw = buffer_get_string(&m, &len); 264 if (len != sizeof(struct passwd)) 265 fatal("%s: struct passwd size mismatch", __func__); 266 pw->pw_name = buffer_get_string(&m, NULL); 267 pw->pw_passwd = buffer_get_string(&m, NULL); 268 pw->pw_gecos = buffer_get_string(&m, NULL); 269#ifdef HAVE_PW_CLASS_IN_PASSWD 270 pw->pw_class = buffer_get_string(&m, NULL); 271#endif 272 pw->pw_dir = buffer_get_string(&m, NULL); 273 pw->pw_shell = buffer_get_string(&m, NULL); 274 275out: 276 /* copy options block as a Match directive may have changed some */ 277 newopts = buffer_get_string(&m, &len); 278 if (len != sizeof(*newopts)) 279 fatal("%s: option block size mismatch", __func__); 280 281#define M_CP_STROPT(x) do { \ 282 if (newopts->x != NULL) \ 283 newopts->x = buffer_get_string(&m, NULL); \ 284 } while (0) 285#define M_CP_STRARRAYOPT(x, nx) do { \ 286 for (i = 0; i < newopts->nx; i++) \ 287 newopts->x[i] = buffer_get_string(&m, NULL); \ 288 } while (0) 289 /* See comment in servconf.h */ 290 COPY_MATCH_STRING_OPTS(); 291#undef M_CP_STROPT 292#undef M_CP_STRARRAYOPT 293 294 copy_set_server_options(&options, newopts, 1); 295 xfree(newopts); 296 297 buffer_free(&m); 298 299 return (pw); 300} 301 302char * 303mm_auth2_read_banner(void) 304{ 305 Buffer m; 306 char *banner; 307 308 debug3("%s entering", __func__); 309 310 buffer_init(&m); 311 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 312 buffer_clear(&m); 313 314 mm_request_receive_expect(pmonitor->m_recvfd, 315 MONITOR_ANS_AUTH2_READ_BANNER, &m); 316 banner = buffer_get_string(&m, NULL); 317 buffer_free(&m); 318 319 /* treat empty banner as missing banner */ 320 if (strlen(banner) == 0) { 321 xfree(banner); 322 banner = NULL; 323 } 324 return (banner); 325} 326 327/* Inform the privileged process about service and style */ 328 329void 330mm_inform_authserv(char *service, char *style) 331{ 332 Buffer m; 333 334 debug3("%s entering", __func__); 335 336 buffer_init(&m); 337 buffer_put_cstring(&m, service); 338 buffer_put_cstring(&m, style ? style : ""); 339 340 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 341 342 buffer_free(&m); 343} 344 345/* Do the password authentication */ 346int 347mm_auth_password(Authctxt *authctxt, char *password) 348{ 349 Buffer m; 350 int authenticated = 0; 351 352 debug3("%s entering", __func__); 353 354 buffer_init(&m); 355 buffer_put_cstring(&m, password); 356 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 357 358 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 359 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 360 361 authenticated = buffer_get_int(&m); 362 363 buffer_free(&m); 364 365 debug3("%s: user %sauthenticated", 366 __func__, authenticated ? "" : "not "); 367 return (authenticated); 368} 369 370int 371mm_user_key_allowed(struct passwd *pw, Key *key) 372{ 373 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); 374} 375 376int 377mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, 378 Key *key) 379{ 380 return (mm_key_allowed(MM_HOSTKEY, user, host, key)); 381} 382 383int 384mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, 385 char *host, Key *key) 386{ 387 int ret; 388 389 key->type = KEY_RSA; /* XXX hack for key_to_blob */ 390 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); 391 key->type = KEY_RSA1; 392 return (ret); 393} 394 395int 396mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) 397{ 398 Buffer m; 399 u_char *blob; 400 u_int len; 401 int allowed = 0, have_forced = 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_int(&m, type); 411 buffer_put_cstring(&m, user ? user : ""); 412 buffer_put_cstring(&m, host ? host : ""); 413 buffer_put_string(&m, blob, len); 414 xfree(blob); 415 416 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 417 418 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 419 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 420 421 allowed = buffer_get_int(&m); 422 423 /* fake forced command */ 424 auth_clear_options(); 425 have_forced = buffer_get_int(&m); 426 forced_command = have_forced ? xstrdup("true") : NULL; 427 428 buffer_free(&m); 429 430 return (allowed); 431} 432 433/* 434 * This key verify needs to send the key type along, because the 435 * privileged parent makes the decision if the key is allowed 436 * for authentication. 437 */ 438 439int 440mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) 441{ 442 Buffer m; 443 u_char *blob; 444 u_int len; 445 int verified = 0; 446 447 debug3("%s entering", __func__); 448 449 /* Convert the key to a blob and the pass it over */ 450 if (!key_to_blob(key, &blob, &len)) 451 return (0); 452 453 buffer_init(&m); 454 buffer_put_string(&m, blob, len); 455 buffer_put_string(&m, sig, siglen); 456 buffer_put_string(&m, data, datalen); 457 xfree(blob); 458 459 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 460 461 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 462 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 463 464 verified = buffer_get_int(&m); 465 466 buffer_free(&m); 467 468 return (verified); 469} 470 471/* Export key state after authentication */ 472Newkeys * 473mm_newkeys_from_blob(u_char *blob, int blen) 474{ 475 Buffer b; 476 u_int len; 477 Newkeys *newkey = NULL; 478 Enc *enc; 479 Mac *mac; 480 Comp *comp; 481 482 debug3("%s: %p(%d)", __func__, blob, blen); 483#ifdef DEBUG_PK 484 dump_base64(stderr, blob, blen); 485#endif 486 buffer_init(&b); 487 buffer_append(&b, blob, blen); 488 489 newkey = xmalloc(sizeof(*newkey)); 490 enc = &newkey->enc; 491 mac = &newkey->mac; 492 comp = &newkey->comp; 493 494 /* Enc structure */ 495 enc->name = buffer_get_string(&b, NULL); 496 buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); 497 enc->enabled = buffer_get_int(&b); 498 enc->block_size = buffer_get_int(&b); 499 enc->key = buffer_get_string(&b, &enc->key_len); 500 enc->iv = buffer_get_string(&b, &enc->iv_len); 501 502 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) 503 fatal("%s: bad cipher name %s or pointer %p", __func__, 504 enc->name, enc->cipher); 505 506 /* Mac structure */ 507 if (cipher_authlen(enc->cipher) == 0) { 508 mac->name = buffer_get_string(&b, NULL); 509 if (mac->name == NULL || mac_setup(mac, mac->name) == -1) 510 fatal("%s: can not setup mac %s", __func__, mac->name); 511 mac->enabled = buffer_get_int(&b); 512 mac->key = buffer_get_string(&b, &len); 513 if (len > mac->key_len) 514 fatal("%s: bad mac key length: %u > %d", __func__, len, 515 mac->key_len); 516 mac->key_len = len; 517 } 518 519 /* Comp structure */ 520 comp->type = buffer_get_int(&b); 521 comp->enabled = buffer_get_int(&b); 522 comp->name = buffer_get_string(&b, NULL); 523 524 len = buffer_len(&b); 525 if (len != 0) 526 error("newkeys_from_blob: remaining bytes in blob %u", len); 527 buffer_free(&b); 528 return (newkey); 529} 530 531int 532mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) 533{ 534 Buffer b; 535 int len; 536 Enc *enc; 537 Mac *mac; 538 Comp *comp; 539 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode); 540 541 debug3("%s: converting %p", __func__, newkey); 542 543 if (newkey == NULL) { 544 error("%s: newkey == NULL", __func__); 545 return 0; 546 } 547 enc = &newkey->enc; 548 mac = &newkey->mac; 549 comp = &newkey->comp; 550 551 buffer_init(&b); 552 /* Enc structure */ 553 buffer_put_cstring(&b, enc->name); 554 /* The cipher struct is constant and shared, you export pointer */ 555 buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); 556 buffer_put_int(&b, enc->enabled); 557 buffer_put_int(&b, enc->block_size); 558 buffer_put_string(&b, enc->key, enc->key_len); 559 packet_get_keyiv(mode, enc->iv, enc->iv_len); 560 buffer_put_string(&b, enc->iv, enc->iv_len); 561 562 /* Mac structure */ 563 if (cipher_authlen(enc->cipher) == 0) { 564 buffer_put_cstring(&b, mac->name); 565 buffer_put_int(&b, mac->enabled); 566 buffer_put_string(&b, mac->key, mac->key_len); 567 } 568 569 /* Comp structure */ 570 buffer_put_int(&b, comp->type); 571 buffer_put_int(&b, comp->enabled); 572 buffer_put_cstring(&b, comp->name); 573 574 len = buffer_len(&b); 575 if (lenp != NULL) 576 *lenp = len; 577 if (blobp != NULL) { 578 *blobp = xmalloc(len); 579 memcpy(*blobp, buffer_ptr(&b), len); 580 } 581 memset(buffer_ptr(&b), 0, len); 582 buffer_free(&b); 583 return len; 584} 585 586static void 587mm_send_kex(Buffer *m, Kex *kex) 588{ 589 buffer_put_string(m, kex->session_id, kex->session_id_len); 590 buffer_put_int(m, kex->we_need); 591 buffer_put_int(m, kex->hostkey_type); 592 buffer_put_int(m, kex->kex_type); 593 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); 594 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); 595 buffer_put_int(m, kex->flags); 596 buffer_put_cstring(m, kex->client_version_string); 597 buffer_put_cstring(m, kex->server_version_string); 598} 599 600void 601mm_send_keystate(struct monitor *monitor) 602{ 603 Buffer m, *input, *output; 604 u_char *blob, *p; 605 u_int bloblen, plen; 606 u_int32_t seqnr, packets; 607 u_int64_t blocks, bytes; 608 609 buffer_init(&m); 610 611 if (!compat20) { 612 u_char iv[24]; 613 u_char *key; 614 u_int ivlen, keylen; 615 616 buffer_put_int(&m, packet_get_protocol_flags()); 617 618 buffer_put_int(&m, packet_get_ssh1_cipher()); 619 620 debug3("%s: Sending ssh1 KEY+IV", __func__); 621 keylen = packet_get_encryption_key(NULL); 622 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ 623 keylen = packet_get_encryption_key(key); 624 buffer_put_string(&m, key, keylen); 625 memset(key, 0, keylen); 626 xfree(key); 627 628 ivlen = packet_get_keyiv_len(MODE_OUT); 629 packet_get_keyiv(MODE_OUT, iv, ivlen); 630 buffer_put_string(&m, iv, ivlen); 631 ivlen = packet_get_keyiv_len(MODE_IN); 632 packet_get_keyiv(MODE_IN, iv, ivlen); 633 buffer_put_string(&m, iv, ivlen); 634 goto skip; 635 } else { 636 /* Kex for rekeying */ 637 mm_send_kex(&m, *monitor->m_pkex); 638 } 639 640 debug3("%s: Sending new keys: %p %p", 641 __func__, packet_get_newkeys(MODE_OUT), 642 packet_get_newkeys(MODE_IN)); 643 644 /* Keys from Kex */ 645 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) 646 fatal("%s: conversion of newkeys failed", __func__); 647 648 buffer_put_string(&m, blob, bloblen); 649 xfree(blob); 650 651 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) 652 fatal("%s: conversion of newkeys failed", __func__); 653 654 buffer_put_string(&m, blob, bloblen); 655 xfree(blob); 656 657 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); 658 buffer_put_int(&m, seqnr); 659 buffer_put_int64(&m, blocks); 660 buffer_put_int(&m, packets); 661 buffer_put_int64(&m, bytes); 662 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); 663 buffer_put_int(&m, seqnr); 664 buffer_put_int64(&m, blocks); 665 buffer_put_int(&m, packets); 666 buffer_put_int64(&m, bytes); 667 668 debug3("%s: New keys have been sent", __func__); 669 skip: 670 /* More key context */ 671 plen = packet_get_keycontext(MODE_OUT, NULL); 672 p = xmalloc(plen+1); 673 packet_get_keycontext(MODE_OUT, p); 674 buffer_put_string(&m, p, plen); 675 xfree(p); 676 677 plen = packet_get_keycontext(MODE_IN, NULL); 678 p = xmalloc(plen+1); 679 packet_get_keycontext(MODE_IN, p); 680 buffer_put_string(&m, p, plen); 681 xfree(p); 682 683 /* Compression state */ 684 debug3("%s: Sending compression state", __func__); 685 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); 686 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); 687 688 /* Network I/O buffers */ 689 input = (Buffer *)packet_get_input(); 690 output = (Buffer *)packet_get_output(); 691 buffer_put_string(&m, buffer_ptr(input), buffer_len(input)); 692 buffer_put_string(&m, buffer_ptr(output), buffer_len(output)); 693 694 /* Roaming */ 695 if (compat20) { 696 buffer_put_int64(&m, get_sent_bytes()); 697 buffer_put_int64(&m, get_recv_bytes()); 698 } 699 700 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); 701 debug3("%s: Finished sending state", __func__); 702 703 buffer_free(&m); 704} 705 706int 707mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 708{ 709 Buffer m; 710 char *p, *msg; 711 int success = 0, tmp1 = -1, tmp2 = -1; 712 713 /* Kludge: ensure there are fds free to receive the pty/tty */ 714 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 715 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 716 error("%s: cannot allocate fds for pty", __func__); 717 if (tmp1 > 0) 718 close(tmp1); 719 if (tmp2 > 0) 720 close(tmp2); 721 return 0; 722 } 723 close(tmp1); 724 close(tmp2); 725 726 buffer_init(&m); 727 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 728 729 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 730 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 731 732 success = buffer_get_int(&m); 733 if (success == 0) { 734 debug3("%s: pty alloc failed", __func__); 735 buffer_free(&m); 736 return (0); 737 } 738 p = buffer_get_string(&m, NULL); 739 msg = buffer_get_string(&m, NULL); 740 buffer_free(&m); 741 742 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 743 xfree(p); 744 745 buffer_append(&loginmsg, msg, strlen(msg)); 746 xfree(msg); 747 748 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 749 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 750 fatal("%s: receive fds failed", __func__); 751 752 /* Success */ 753 return (1); 754} 755 756void 757mm_session_pty_cleanup2(Session *s) 758{ 759 Buffer m; 760 761 if (s->ttyfd == -1) 762 return; 763 buffer_init(&m); 764 buffer_put_cstring(&m, s->tty); 765 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 766 buffer_free(&m); 767 768 /* closed dup'ed master */ 769 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 770 error("close(s->ptymaster/%d): %s", 771 s->ptymaster, strerror(errno)); 772 773 /* unlink pty from session */ 774 s->ttyfd = -1; 775} 776 777#ifdef USE_PAM 778void 779mm_start_pam(Authctxt *authctxt) 780{ 781 Buffer m; 782 783 debug3("%s entering", __func__); 784 if (!options.use_pam) 785 fatal("UsePAM=no, but ended up in %s anyway", __func__); 786 787 buffer_init(&m); 788 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); 789 790 buffer_free(&m); 791} 792 793u_int 794mm_do_pam_account(void) 795{ 796 Buffer m; 797 u_int ret; 798 char *msg; 799 800 debug3("%s entering", __func__); 801 if (!options.use_pam) 802 fatal("UsePAM=no, but ended up in %s anyway", __func__); 803 804 buffer_init(&m); 805 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); 806 807 mm_request_receive_expect(pmonitor->m_recvfd, 808 MONITOR_ANS_PAM_ACCOUNT, &m); 809 ret = buffer_get_int(&m); 810 msg = buffer_get_string(&m, NULL); 811 buffer_append(&loginmsg, msg, strlen(msg)); 812 xfree(msg); 813 814 buffer_free(&m); 815 816 debug3("%s returning %d", __func__, ret); 817 818 return (ret); 819} 820 821void * 822mm_sshpam_init_ctx(Authctxt *authctxt) 823{ 824 Buffer m; 825 int success; 826 827 debug3("%s", __func__); 828 buffer_init(&m); 829 buffer_put_cstring(&m, authctxt->user); 830 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); 831 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); 832 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); 833 success = buffer_get_int(&m); 834 if (success == 0) { 835 debug3("%s: pam_init_ctx failed", __func__); 836 buffer_free(&m); 837 return (NULL); 838 } 839 buffer_free(&m); 840 return (authctxt); 841} 842 843int 844mm_sshpam_query(void *ctx, char **name, char **info, 845 u_int *num, char ***prompts, u_int **echo_on) 846{ 847 Buffer m; 848 u_int i; 849 int ret; 850 851 debug3("%s", __func__); 852 buffer_init(&m); 853 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); 854 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); 855 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); 856 ret = buffer_get_int(&m); 857 debug3("%s: pam_query returned %d", __func__, ret); 858 *name = buffer_get_string(&m, NULL); 859 *info = buffer_get_string(&m, NULL); 860 *num = buffer_get_int(&m); 861 if (*num > PAM_MAX_NUM_MSG) 862 fatal("%s: recieved %u PAM messages, expected <= %u", 863 __func__, *num, PAM_MAX_NUM_MSG); 864 *prompts = xcalloc((*num + 1), sizeof(char *)); 865 *echo_on = xcalloc((*num + 1), sizeof(u_int)); 866 for (i = 0; i < *num; ++i) { 867 (*prompts)[i] = buffer_get_string(&m, NULL); 868 (*echo_on)[i] = buffer_get_int(&m); 869 } 870 buffer_free(&m); 871 return (ret); 872} 873 874int 875mm_sshpam_respond(void *ctx, u_int num, char **resp) 876{ 877 Buffer m; 878 u_int i; 879 int ret; 880 881 debug3("%s", __func__); 882 buffer_init(&m); 883 buffer_put_int(&m, num); 884 for (i = 0; i < num; ++i) 885 buffer_put_cstring(&m, resp[i]); 886 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); 887 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); 888 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); 889 ret = buffer_get_int(&m); 890 debug3("%s: pam_respond returned %d", __func__, ret); 891 buffer_free(&m); 892 return (ret); 893} 894 895void 896mm_sshpam_free_ctx(void *ctxtp) 897{ 898 Buffer m; 899 900 debug3("%s", __func__); 901 buffer_init(&m); 902 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); 903 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); 904 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); 905 buffer_free(&m); 906} 907#endif /* USE_PAM */ 908 909/* Request process termination */ 910 911void 912mm_terminate(void) 913{ 914 Buffer m; 915 916 buffer_init(&m); 917 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 918 buffer_free(&m); 919} 920 921int 922mm_ssh1_session_key(BIGNUM *num) 923{ 924 int rsafail; 925 Buffer m; 926 927 buffer_init(&m); 928 buffer_put_bignum2(&m, num); 929 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); 930 931 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); 932 933 rsafail = buffer_get_int(&m); 934 buffer_get_bignum2(&m, num); 935 936 buffer_free(&m); 937 938 return (rsafail); 939} 940 941static void 942mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 943 char ***prompts, u_int **echo_on) 944{ 945 *name = xstrdup(""); 946 *infotxt = xstrdup(""); 947 *numprompts = 1; 948 *prompts = xcalloc(*numprompts, sizeof(char *)); 949 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 950 (*echo_on)[0] = 0; 951} 952 953int 954mm_bsdauth_query(void *ctx, char **name, char **infotxt, 955 u_int *numprompts, char ***prompts, u_int **echo_on) 956{ 957 Buffer m; 958 u_int success; 959 char *challenge; 960 961 debug3("%s: entering", __func__); 962 963 buffer_init(&m); 964 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 965 966 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 967 &m); 968 success = buffer_get_int(&m); 969 if (success == 0) { 970 debug3("%s: no challenge", __func__); 971 buffer_free(&m); 972 return (-1); 973 } 974 975 /* Get the challenge, and format the response */ 976 challenge = buffer_get_string(&m, NULL); 977 buffer_free(&m); 978 979 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 980 (*prompts)[0] = challenge; 981 982 debug3("%s: received challenge: %s", __func__, challenge); 983 984 return (0); 985} 986 987int 988mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 989{ 990 Buffer m; 991 int authok; 992 993 debug3("%s: entering", __func__); 994 if (numresponses != 1) 995 return (-1); 996 997 buffer_init(&m); 998 buffer_put_cstring(&m, responses[0]); 999 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 1000 1001 mm_request_receive_expect(pmonitor->m_recvfd, 1002 MONITOR_ANS_BSDAUTHRESPOND, &m); 1003 1004 authok = buffer_get_int(&m); 1005 buffer_free(&m); 1006 1007 return ((authok == 0) ? -1 : 0); 1008} 1009 1010#ifdef SKEY 1011int 1012mm_skey_query(void *ctx, char **name, char **infotxt, 1013 u_int *numprompts, char ***prompts, u_int **echo_on) 1014{ 1015 Buffer m; 1016 u_int success; 1017 char *challenge; 1018 1019 debug3("%s: entering", __func__); 1020 1021 buffer_init(&m); 1022 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); 1023 1024 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, 1025 &m); 1026 success = buffer_get_int(&m); 1027 if (success == 0) { 1028 debug3("%s: no challenge", __func__); 1029 buffer_free(&m); 1030 return (-1); 1031 } 1032 1033 /* Get the challenge, and format the response */ 1034 challenge = buffer_get_string(&m, NULL); 1035 buffer_free(&m); 1036 1037 debug3("%s: received challenge: %s", __func__, challenge); 1038 1039 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 1040 1041 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); 1042 xfree(challenge); 1043 1044 return (0); 1045} 1046 1047int 1048mm_skey_respond(void *ctx, u_int numresponses, char **responses) 1049{ 1050 Buffer m; 1051 int authok; 1052 1053 debug3("%s: entering", __func__); 1054 if (numresponses != 1) 1055 return (-1); 1056 1057 buffer_init(&m); 1058 buffer_put_cstring(&m, responses[0]); 1059 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); 1060 1061 mm_request_receive_expect(pmonitor->m_recvfd, 1062 MONITOR_ANS_SKEYRESPOND, &m); 1063 1064 authok = buffer_get_int(&m); 1065 buffer_free(&m); 1066 1067 return ((authok == 0) ? -1 : 0); 1068} 1069#endif /* SKEY */ 1070 1071void 1072mm_ssh1_session_id(u_char session_id[16]) 1073{ 1074 Buffer m; 1075 int i; 1076 1077 debug3("%s entering", __func__); 1078 1079 buffer_init(&m); 1080 for (i = 0; i < 16; i++) 1081 buffer_put_char(&m, session_id[i]); 1082 1083 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); 1084 buffer_free(&m); 1085} 1086 1087int 1088mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) 1089{ 1090 Buffer m; 1091 Key *key; 1092 u_char *blob; 1093 u_int blen; 1094 int allowed = 0, have_forced = 0; 1095 1096 debug3("%s entering", __func__); 1097 1098 buffer_init(&m); 1099 buffer_put_bignum2(&m, client_n); 1100 1101 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); 1102 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); 1103 1104 allowed = buffer_get_int(&m); 1105 1106 /* fake forced command */ 1107 auth_clear_options(); 1108 have_forced = buffer_get_int(&m); 1109 forced_command = have_forced ? xstrdup("true") : NULL; 1110 1111 if (allowed && rkey != NULL) { 1112 blob = buffer_get_string(&m, &blen); 1113 if ((key = key_from_blob(blob, blen)) == NULL) 1114 fatal("%s: key_from_blob failed", __func__); 1115 *rkey = key; 1116 xfree(blob); 1117 } 1118 buffer_free(&m); 1119 1120 return (allowed); 1121} 1122 1123BIGNUM * 1124mm_auth_rsa_generate_challenge(Key *key) 1125{ 1126 Buffer m; 1127 BIGNUM *challenge; 1128 u_char *blob; 1129 u_int blen; 1130 1131 debug3("%s entering", __func__); 1132 1133 if ((challenge = BN_new()) == NULL) 1134 fatal("%s: BN_new failed", __func__); 1135 1136 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1137 if (key_to_blob(key, &blob, &blen) == 0) 1138 fatal("%s: key_to_blob failed", __func__); 1139 key->type = KEY_RSA1; 1140 1141 buffer_init(&m); 1142 buffer_put_string(&m, blob, blen); 1143 xfree(blob); 1144 1145 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); 1146 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); 1147 1148 buffer_get_bignum2(&m, challenge); 1149 buffer_free(&m); 1150 1151 return (challenge); 1152} 1153 1154int 1155mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) 1156{ 1157 Buffer m; 1158 u_char *blob; 1159 u_int blen; 1160 int success = 0; 1161 1162 debug3("%s entering", __func__); 1163 1164 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1165 if (key_to_blob(key, &blob, &blen) == 0) 1166 fatal("%s: key_to_blob failed", __func__); 1167 key->type = KEY_RSA1; 1168 1169 buffer_init(&m); 1170 buffer_put_string(&m, blob, blen); 1171 buffer_put_string(&m, response, 16); 1172 xfree(blob); 1173 1174 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); 1175 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); 1176 1177 success = buffer_get_int(&m); 1178 buffer_free(&m); 1179 1180 return (success); 1181} 1182 1183#ifdef SSH_AUDIT_EVENTS 1184void 1185mm_audit_event(ssh_audit_event_t event) 1186{ 1187 Buffer m; 1188 1189 debug3("%s entering", __func__); 1190 1191 buffer_init(&m); 1192 buffer_put_int(&m, event); 1193 1194 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); 1195 buffer_free(&m); 1196} 1197 1198void 1199mm_audit_run_command(const char *command) 1200{ 1201 Buffer m; 1202 1203 debug3("%s entering command %s", __func__, command); 1204 1205 buffer_init(&m); 1206 buffer_put_cstring(&m, command); 1207 1208 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); 1209 buffer_free(&m); 1210} 1211#endif /* SSH_AUDIT_EVENTS */ 1212 1213#ifdef GSSAPI 1214OM_uint32 1215mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 1216{ 1217 Buffer m; 1218 OM_uint32 major; 1219 1220 /* Client doesn't get to see the context */ 1221 *ctx = NULL; 1222 1223 buffer_init(&m); 1224 buffer_put_string(&m, goid->elements, goid->length); 1225 1226 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 1227 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 1228 1229 major = buffer_get_int(&m); 1230 1231 buffer_free(&m); 1232 return (major); 1233} 1234 1235OM_uint32 1236mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 1237 gss_buffer_desc *out, OM_uint32 *flags) 1238{ 1239 Buffer m; 1240 OM_uint32 major; 1241 u_int len; 1242 1243 buffer_init(&m); 1244 buffer_put_string(&m, in->value, in->length); 1245 1246 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 1247 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 1248 1249 major = buffer_get_int(&m); 1250 out->value = buffer_get_string(&m, &len); 1251 out->length = len; 1252 if (flags) 1253 *flags = buffer_get_int(&m); 1254 1255 buffer_free(&m); 1256 1257 return (major); 1258} 1259 1260OM_uint32 1261mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 1262{ 1263 Buffer m; 1264 OM_uint32 major; 1265 1266 buffer_init(&m); 1267 buffer_put_string(&m, gssbuf->value, gssbuf->length); 1268 buffer_put_string(&m, gssmic->value, gssmic->length); 1269 1270 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 1271 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 1272 &m); 1273 1274 major = buffer_get_int(&m); 1275 buffer_free(&m); 1276 return(major); 1277} 1278 1279int 1280mm_ssh_gssapi_userok(char *user, struct passwd *pw) 1281{ 1282 Buffer m; 1283 int authenticated = 0; 1284 1285 buffer_init(&m); 1286 1287 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 1288 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 1289 &m); 1290 1291 authenticated = buffer_get_int(&m); 1292 1293 buffer_free(&m); 1294 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 1295 return (authenticated); 1296} 1297 1298OM_uint32 1299mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash) 1300{ 1301 Buffer m; 1302 OM_uint32 major; 1303 u_int len; 1304 1305 buffer_init(&m); 1306 buffer_put_string(&m, data->value, data->length); 1307 1308 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m); 1309 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m); 1310 1311 major = buffer_get_int(&m); 1312 hash->value = buffer_get_string(&m, &len); 1313 hash->length = len; 1314 1315 buffer_free(&m); 1316 1317 return(major); 1318} 1319 1320int 1321mm_ssh_gssapi_update_creds(ssh_gssapi_ccache *store) 1322{ 1323 Buffer m; 1324 int ok; 1325 1326 buffer_init(&m); 1327 1328 buffer_put_cstring(&m, store->filename ? store->filename : ""); 1329 buffer_put_cstring(&m, store->envvar ? store->envvar : ""); 1330 buffer_put_cstring(&m, store->envval ? store->envval : ""); 1331 1332 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUPCREDS, &m); 1333 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUPCREDS, &m); 1334 1335 ok = buffer_get_int(&m); 1336 1337 buffer_free(&m); 1338 1339 return (ok); 1340} 1341 1342#endif /* GSSAPI */ 1343 1344#ifdef JPAKE 1345void 1346mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, 1347 char **hash_scheme, char **salt) 1348{ 1349 Buffer m; 1350 1351 debug3("%s entering", __func__); 1352 1353 buffer_init(&m); 1354 mm_request_send(pmonitor->m_recvfd, 1355 MONITOR_REQ_JPAKE_GET_PWDATA, &m); 1356 1357 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); 1358 mm_request_receive_expect(pmonitor->m_recvfd, 1359 MONITOR_ANS_JPAKE_GET_PWDATA, &m); 1360 1361 *hash_scheme = buffer_get_string(&m, NULL); 1362 *salt = buffer_get_string(&m, NULL); 1363 1364 buffer_free(&m); 1365} 1366 1367void 1368mm_jpake_step1(struct modp_group *grp, 1369 u_char **id, u_int *id_len, 1370 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, 1371 u_char **priv1_proof, u_int *priv1_proof_len, 1372 u_char **priv2_proof, u_int *priv2_proof_len) 1373{ 1374 Buffer m; 1375 1376 debug3("%s entering", __func__); 1377 1378 buffer_init(&m); 1379 mm_request_send(pmonitor->m_recvfd, 1380 MONITOR_REQ_JPAKE_STEP1, &m); 1381 1382 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); 1383 mm_request_receive_expect(pmonitor->m_recvfd, 1384 MONITOR_ANS_JPAKE_STEP1, &m); 1385 1386 if ((*priv1 = BN_new()) == NULL || 1387 (*priv2 = BN_new()) == NULL || 1388 (*g_priv1 = BN_new()) == NULL || 1389 (*g_priv2 = BN_new()) == NULL) 1390 fatal("%s: BN_new", __func__); 1391 1392 *id = buffer_get_string(&m, id_len); 1393 /* priv1 and priv2 are, well, private */ 1394 buffer_get_bignum2(&m, *g_priv1); 1395 buffer_get_bignum2(&m, *g_priv2); 1396 *priv1_proof = buffer_get_string(&m, priv1_proof_len); 1397 *priv2_proof = buffer_get_string(&m, priv2_proof_len); 1398 1399 buffer_free(&m); 1400} 1401 1402void 1403mm_jpake_step2(struct modp_group *grp, BIGNUM *s, 1404 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, 1405 const u_char *theirid, u_int theirid_len, 1406 const u_char *myid, u_int myid_len, 1407 const u_char *theirpub1_proof, u_int theirpub1_proof_len, 1408 const u_char *theirpub2_proof, u_int theirpub2_proof_len, 1409 BIGNUM **newpub, 1410 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) 1411{ 1412 Buffer m; 1413 1414 debug3("%s entering", __func__); 1415 1416 buffer_init(&m); 1417 /* monitor already has all bignums except theirpub1, theirpub2 */ 1418 buffer_put_bignum2(&m, theirpub1); 1419 buffer_put_bignum2(&m, theirpub2); 1420 /* monitor already knows our id */ 1421 buffer_put_string(&m, theirid, theirid_len); 1422 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); 1423 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); 1424 1425 mm_request_send(pmonitor->m_recvfd, 1426 MONITOR_REQ_JPAKE_STEP2, &m); 1427 1428 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); 1429 mm_request_receive_expect(pmonitor->m_recvfd, 1430 MONITOR_ANS_JPAKE_STEP2, &m); 1431 1432 if ((*newpub = BN_new()) == NULL) 1433 fatal("%s: BN_new", __func__); 1434 1435 buffer_get_bignum2(&m, *newpub); 1436 *newpub_exponent_proof = buffer_get_string(&m, 1437 newpub_exponent_proof_len); 1438 1439 buffer_free(&m); 1440} 1441 1442void 1443mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val, 1444 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, 1445 BIGNUM *theirpub1, BIGNUM *theirpub2, 1446 const u_char *my_id, u_int my_id_len, 1447 const u_char *their_id, u_int their_id_len, 1448 const u_char *sess_id, u_int sess_id_len, 1449 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, 1450 BIGNUM **k, 1451 u_char **confirm_hash, u_int *confirm_hash_len) 1452{ 1453 Buffer m; 1454 1455 debug3("%s entering", __func__); 1456 1457 buffer_init(&m); 1458 /* monitor already has all bignums except step2_val */ 1459 buffer_put_bignum2(&m, step2_val); 1460 /* monitor already knows all the ids */ 1461 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); 1462 1463 mm_request_send(pmonitor->m_recvfd, 1464 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); 1465 1466 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); 1467 mm_request_receive_expect(pmonitor->m_recvfd, 1468 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); 1469 1470 /* 'k' is sensitive and stays in the monitor */ 1471 *confirm_hash = buffer_get_string(&m, confirm_hash_len); 1472 1473 buffer_free(&m); 1474} 1475 1476int 1477mm_jpake_check_confirm(const BIGNUM *k, 1478 const u_char *peer_id, u_int peer_id_len, 1479 const u_char *sess_id, u_int sess_id_len, 1480 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) 1481{ 1482 Buffer m; 1483 int success = 0; 1484 1485 debug3("%s entering", __func__); 1486 1487 buffer_init(&m); 1488 /* k is dummy in slave, ignored */ 1489 /* monitor knows all the ids */ 1490 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); 1491 mm_request_send(pmonitor->m_recvfd, 1492 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); 1493 1494 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); 1495 mm_request_receive_expect(pmonitor->m_recvfd, 1496 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); 1497 1498 success = buffer_get_int(&m); 1499 buffer_free(&m); 1500 1501 debug3("%s: success = %d", __func__, success); 1502 return success; 1503} 1504#endif /* JPAKE */ 1505