1 /* $OpenBSD: monitor_wrap.c,v 1.73 2011/06/17 21:44:31 djm Exp $ */ 2 /* 3 * Copyright 2002 Niels Provos <provos@citi.umich.edu> 4 * Copyright 2002 Markus Friedl <markus@openbsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "includes.h" 29 30 #include <sys/types.h> 31 #include <sys/uio.h> 32 33 #include <errno.h> 34 #include <pwd.h> 35 #include <signal.h> 36 #include <stdarg.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 #include <openssl/bn.h> 42 #include <openssl/dh.h> 43 #include <openssl/evp.h> 44 45 #include "openbsd-compat/sys-queue.h" 46 #include "xmalloc.h" 47 #include "ssh.h" 48 #include "dh.h" 49 #include "buffer.h" 50 #include "key.h" 51 #include "cipher.h" 52 #include "kex.h" 53 #include "hostfile.h" 54 #include "auth.h" 55 #include "auth-options.h" 56 #include "packet.h" 57 #include "mac.h" 58 #include "log.h" 59 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ 60 #undef TARGET_OS_MAC 61 #include "zlib.h" 62 #define TARGET_OS_MAC 1 63 #else 64 #include "zlib.h" 65 #endif 66 #include "monitor.h" 67 #ifdef GSSAPI 68 #include "ssh-gss.h" 69 #endif 70 #include "monitor_wrap.h" 71 #include "atomicio.h" 72 #include "monitor_fdpass.h" 73 #include "misc.h" 74 #include "schnorr.h" 75 #include "jpake.h" 76 #include "uuencode.h" 77 78 #include "channels.h" 79 #include "session.h" 80 #include "servconf.h" 81 #include "roaming.h" 82 83 /* Imports */ 84 extern int compat20; 85 extern z_stream incoming_stream; 86 extern z_stream outgoing_stream; 87 extern struct monitor *pmonitor; 88 extern Buffer loginmsg; 89 extern ServerOptions options; 90 91 void 92 mm_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 } 116 117 int 118 mm_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 } 126 127 void 128 mm_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 } 142 143 void 144 mm_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 } 164 165 void 166 mm_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 } 178 179 DH * 180 mm_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 } 212 213 int 214 mm_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 } 234 235 struct passwd * 236 mm_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 pw->pw_gecos = buffer_get_string(&m, NULL); 263 #ifdef HAVE_PW_CLASS_IN_PASSWD 264 pw->pw_class = buffer_get_string(&m, NULL); 265 #endif 266 pw->pw_dir = buffer_get_string(&m, NULL); 267 pw->pw_shell = buffer_get_string(&m, NULL); 268 269 out: 270 /* copy options block as a Match directive may have changed some */ 271 newopts = buffer_get_string(&m, &len); 272 if (len != sizeof(*newopts)) 273 fatal("%s: option block size mismatch", __func__); 274 275 #define M_CP_STROPT(x) do { \ 276 if (newopts->x != NULL) \ 277 newopts->x = buffer_get_string(&m, NULL); \ 278 } while (0) 279 #define M_CP_STRARRAYOPT(x, nx) do { \ 280 for (i = 0; i < newopts->nx; i++) \ 281 newopts->x[i] = buffer_get_string(&m, NULL); \ 282 } while (0) 283 /* See comment in servconf.h */ 284 COPY_MATCH_STRING_OPTS(); 285 #undef M_CP_STROPT 286 #undef M_CP_STRARRAYOPT 287 288 copy_set_server_options(&options, newopts, 1); 289 xfree(newopts); 290 291 buffer_free(&m); 292 293 return (pw); 294 } 295 296 char * 297 mm_auth2_read_banner(void) 298 { 299 Buffer m; 300 char *banner; 301 302 debug3("%s entering", __func__); 303 304 buffer_init(&m); 305 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 306 buffer_clear(&m); 307 308 mm_request_receive_expect(pmonitor->m_recvfd, 309 MONITOR_ANS_AUTH2_READ_BANNER, &m); 310 banner = buffer_get_string(&m, NULL); 311 buffer_free(&m); 312 313 /* treat empty banner as missing banner */ 314 if (strlen(banner) == 0) { 315 xfree(banner); 316 banner = NULL; 317 } 318 return (banner); 319 } 320 321 /* Inform the privileged process about service and style */ 322 323 void 324 mm_inform_authserv(char *service, char *style) 325 { 326 Buffer m; 327 328 debug3("%s entering", __func__); 329 330 buffer_init(&m); 331 buffer_put_cstring(&m, service); 332 buffer_put_cstring(&m, style ? style : ""); 333 334 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 335 336 buffer_free(&m); 337 } 338 339 /* Do the password authentication */ 340 int 341 mm_auth_password(Authctxt *authctxt, char *password) 342 { 343 Buffer m; 344 int authenticated = 0; 345 346 debug3("%s entering", __func__); 347 348 buffer_init(&m); 349 buffer_put_cstring(&m, password); 350 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 351 352 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 353 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 354 355 authenticated = buffer_get_int(&m); 356 357 buffer_free(&m); 358 359 debug3("%s: user %sauthenticated", 360 __func__, authenticated ? "" : "not "); 361 return (authenticated); 362 } 363 364 int 365 mm_user_key_allowed(struct passwd *pw, Key *key) 366 { 367 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); 368 } 369 370 int 371 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, 372 Key *key) 373 { 374 return (mm_key_allowed(MM_HOSTKEY, user, host, key)); 375 } 376 377 int 378 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, 379 char *host, Key *key) 380 { 381 int ret; 382 383 key->type = KEY_RSA; /* XXX hack for key_to_blob */ 384 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); 385 key->type = KEY_RSA1; 386 return (ret); 387 } 388 389 int 390 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) 391 { 392 Buffer m; 393 u_char *blob; 394 u_int len; 395 int allowed = 0, have_forced = 0; 396 397 debug3("%s entering", __func__); 398 399 /* Convert the key to a blob and the pass it over */ 400 if (!key_to_blob(key, &blob, &len)) 401 return (0); 402 403 buffer_init(&m); 404 buffer_put_int(&m, type); 405 buffer_put_cstring(&m, user ? user : ""); 406 buffer_put_cstring(&m, host ? host : ""); 407 buffer_put_string(&m, blob, len); 408 xfree(blob); 409 410 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 411 412 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 413 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 414 415 allowed = buffer_get_int(&m); 416 417 /* fake forced command */ 418 auth_clear_options(); 419 have_forced = buffer_get_int(&m); 420 forced_command = have_forced ? xstrdup("true") : NULL; 421 422 buffer_free(&m); 423 424 return (allowed); 425 } 426 427 /* 428 * This key verify needs to send the key type along, because the 429 * privileged parent makes the decision if the key is allowed 430 * for authentication. 431 */ 432 433 int 434 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) 435 { 436 Buffer m; 437 u_char *blob; 438 u_int len; 439 int verified = 0; 440 441 debug3("%s entering", __func__); 442 443 /* Convert the key to a blob and the pass it over */ 444 if (!key_to_blob(key, &blob, &len)) 445 return (0); 446 447 buffer_init(&m); 448 buffer_put_string(&m, blob, len); 449 buffer_put_string(&m, sig, siglen); 450 buffer_put_string(&m, data, datalen); 451 xfree(blob); 452 453 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 454 455 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 456 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 457 458 verified = buffer_get_int(&m); 459 460 buffer_free(&m); 461 462 return (verified); 463 } 464 465 /* Export key state after authentication */ 466 Newkeys * 467 mm_newkeys_from_blob(u_char *blob, int blen) 468 { 469 Buffer b; 470 u_int len; 471 Newkeys *newkey = NULL; 472 Enc *enc; 473 Mac *mac; 474 Comp *comp; 475 476 debug3("%s: %p(%d)", __func__, blob, blen); 477 #ifdef DEBUG_PK 478 dump_base64(stderr, blob, blen); 479 #endif 480 buffer_init(&b); 481 buffer_append(&b, blob, blen); 482 483 newkey = xmalloc(sizeof(*newkey)); 484 enc = &newkey->enc; 485 mac = &newkey->mac; 486 comp = &newkey->comp; 487 488 /* Enc structure */ 489 enc->name = buffer_get_string(&b, NULL); 490 buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); 491 enc->enabled = buffer_get_int(&b); 492 enc->block_size = buffer_get_int(&b); 493 enc->key = buffer_get_string(&b, &enc->key_len); 494 enc->iv = buffer_get_string(&b, &len); 495 if (len != enc->block_size) 496 fatal("%s: bad ivlen: expected %u != %u", __func__, 497 enc->block_size, len); 498 499 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) 500 fatal("%s: bad cipher name %s or pointer %p", __func__, 501 enc->name, enc->cipher); 502 503 /* Mac structure */ 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 /* Comp structure */ 515 comp->type = buffer_get_int(&b); 516 comp->enabled = buffer_get_int(&b); 517 comp->name = buffer_get_string(&b, NULL); 518 519 len = buffer_len(&b); 520 if (len != 0) 521 error("newkeys_from_blob: remaining bytes in blob %u", len); 522 buffer_free(&b); 523 return (newkey); 524 } 525 526 int 527 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) 528 { 529 Buffer b; 530 int len; 531 Enc *enc; 532 Mac *mac; 533 Comp *comp; 534 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode); 535 536 debug3("%s: converting %p", __func__, newkey); 537 538 if (newkey == NULL) { 539 error("%s: newkey == NULL", __func__); 540 return 0; 541 } 542 enc = &newkey->enc; 543 mac = &newkey->mac; 544 comp = &newkey->comp; 545 546 buffer_init(&b); 547 /* Enc structure */ 548 buffer_put_cstring(&b, enc->name); 549 /* The cipher struct is constant and shared, you export pointer */ 550 buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); 551 buffer_put_int(&b, enc->enabled); 552 buffer_put_int(&b, enc->block_size); 553 buffer_put_string(&b, enc->key, enc->key_len); 554 packet_get_keyiv(mode, enc->iv, enc->block_size); 555 buffer_put_string(&b, enc->iv, enc->block_size); 556 557 /* Mac structure */ 558 buffer_put_cstring(&b, mac->name); 559 buffer_put_int(&b, mac->enabled); 560 buffer_put_string(&b, mac->key, mac->key_len); 561 562 /* Comp structure */ 563 buffer_put_int(&b, comp->type); 564 buffer_put_int(&b, comp->enabled); 565 buffer_put_cstring(&b, comp->name); 566 567 len = buffer_len(&b); 568 if (lenp != NULL) 569 *lenp = len; 570 if (blobp != NULL) { 571 *blobp = xmalloc(len); 572 memcpy(*blobp, buffer_ptr(&b), len); 573 } 574 memset(buffer_ptr(&b), 0, len); 575 buffer_free(&b); 576 return len; 577 } 578 579 static void 580 mm_send_kex(Buffer *m, Kex *kex) 581 { 582 buffer_put_string(m, kex->session_id, kex->session_id_len); 583 buffer_put_int(m, kex->we_need); 584 buffer_put_int(m, kex->hostkey_type); 585 buffer_put_int(m, kex->kex_type); 586 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); 587 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); 588 buffer_put_int(m, kex->flags); 589 buffer_put_cstring(m, kex->client_version_string); 590 buffer_put_cstring(m, kex->server_version_string); 591 } 592 593 void 594 mm_send_keystate(struct monitor *monitor) 595 { 596 Buffer m, *input, *output; 597 u_char *blob, *p; 598 u_int bloblen, plen; 599 u_int32_t seqnr, packets; 600 u_int64_t blocks, bytes; 601 602 buffer_init(&m); 603 604 if (!compat20) { 605 u_char iv[24]; 606 u_char *key; 607 u_int ivlen, keylen; 608 609 buffer_put_int(&m, packet_get_protocol_flags()); 610 611 buffer_put_int(&m, packet_get_ssh1_cipher()); 612 613 debug3("%s: Sending ssh1 KEY+IV", __func__); 614 keylen = packet_get_encryption_key(NULL); 615 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ 616 keylen = packet_get_encryption_key(key); 617 buffer_put_string(&m, key, keylen); 618 memset(key, 0, keylen); 619 xfree(key); 620 621 ivlen = packet_get_keyiv_len(MODE_OUT); 622 packet_get_keyiv(MODE_OUT, iv, ivlen); 623 buffer_put_string(&m, iv, ivlen); 624 ivlen = packet_get_keyiv_len(MODE_OUT); 625 packet_get_keyiv(MODE_IN, iv, ivlen); 626 buffer_put_string(&m, iv, ivlen); 627 goto skip; 628 } else { 629 /* Kex for rekeying */ 630 mm_send_kex(&m, *monitor->m_pkex); 631 } 632 633 debug3("%s: Sending new keys: %p %p", 634 __func__, packet_get_newkeys(MODE_OUT), 635 packet_get_newkeys(MODE_IN)); 636 637 /* Keys from Kex */ 638 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) 639 fatal("%s: conversion of newkeys failed", __func__); 640 641 buffer_put_string(&m, blob, bloblen); 642 xfree(blob); 643 644 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) 645 fatal("%s: conversion of newkeys failed", __func__); 646 647 buffer_put_string(&m, blob, bloblen); 648 xfree(blob); 649 650 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); 651 buffer_put_int(&m, seqnr); 652 buffer_put_int64(&m, blocks); 653 buffer_put_int(&m, packets); 654 buffer_put_int64(&m, bytes); 655 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); 656 buffer_put_int(&m, seqnr); 657 buffer_put_int64(&m, blocks); 658 buffer_put_int(&m, packets); 659 buffer_put_int64(&m, bytes); 660 661 debug3("%s: New keys have been sent", __func__); 662 skip: 663 /* More key context */ 664 plen = packet_get_keycontext(MODE_OUT, NULL); 665 p = xmalloc(plen+1); 666 packet_get_keycontext(MODE_OUT, p); 667 buffer_put_string(&m, p, plen); 668 xfree(p); 669 670 plen = packet_get_keycontext(MODE_IN, NULL); 671 p = xmalloc(plen+1); 672 packet_get_keycontext(MODE_IN, p); 673 buffer_put_string(&m, p, plen); 674 xfree(p); 675 676 /* Compression state */ 677 debug3("%s: Sending compression state", __func__); 678 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); 679 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); 680 681 /* Network I/O buffers */ 682 input = (Buffer *)packet_get_input(); 683 output = (Buffer *)packet_get_output(); 684 buffer_put_string(&m, buffer_ptr(input), buffer_len(input)); 685 buffer_put_string(&m, buffer_ptr(output), buffer_len(output)); 686 687 /* Roaming */ 688 if (compat20) { 689 buffer_put_int64(&m, get_sent_bytes()); 690 buffer_put_int64(&m, get_recv_bytes()); 691 } 692 693 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); 694 debug3("%s: Finished sending state", __func__); 695 696 buffer_free(&m); 697 } 698 699 int 700 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 701 { 702 Buffer m; 703 char *p, *msg; 704 int success = 0, tmp1 = -1, tmp2 = -1; 705 706 /* Kludge: ensure there are fds free to receive the pty/tty */ 707 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 708 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 709 error("%s: cannot allocate fds for pty", __func__); 710 if (tmp1 > 0) 711 close(tmp1); 712 if (tmp2 > 0) 713 close(tmp2); 714 return 0; 715 } 716 close(tmp1); 717 close(tmp2); 718 719 buffer_init(&m); 720 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 721 722 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 723 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 724 725 success = buffer_get_int(&m); 726 if (success == 0) { 727 debug3("%s: pty alloc failed", __func__); 728 buffer_free(&m); 729 return (0); 730 } 731 p = buffer_get_string(&m, NULL); 732 msg = buffer_get_string(&m, NULL); 733 buffer_free(&m); 734 735 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 736 xfree(p); 737 738 buffer_append(&loginmsg, msg, strlen(msg)); 739 xfree(msg); 740 741 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 742 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 743 fatal("%s: receive fds failed", __func__); 744 745 /* Success */ 746 return (1); 747 } 748 749 void 750 mm_session_pty_cleanup2(Session *s) 751 { 752 Buffer m; 753 754 if (s->ttyfd == -1) 755 return; 756 buffer_init(&m); 757 buffer_put_cstring(&m, s->tty); 758 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 759 buffer_free(&m); 760 761 /* closed dup'ed master */ 762 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 763 error("close(s->ptymaster/%d): %s", 764 s->ptymaster, strerror(errno)); 765 766 /* unlink pty from session */ 767 s->ttyfd = -1; 768 } 769 770 #ifdef USE_PAM 771 void 772 mm_start_pam(Authctxt *authctxt) 773 { 774 Buffer m; 775 776 debug3("%s entering", __func__); 777 if (!options.use_pam) 778 fatal("UsePAM=no, but ended up in %s anyway", __func__); 779 780 buffer_init(&m); 781 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); 782 783 buffer_free(&m); 784 } 785 786 u_int 787 mm_do_pam_account(void) 788 { 789 Buffer m; 790 u_int ret; 791 char *msg; 792 793 debug3("%s entering", __func__); 794 if (!options.use_pam) 795 fatal("UsePAM=no, but ended up in %s anyway", __func__); 796 797 buffer_init(&m); 798 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); 799 800 mm_request_receive_expect(pmonitor->m_recvfd, 801 MONITOR_ANS_PAM_ACCOUNT, &m); 802 ret = buffer_get_int(&m); 803 msg = buffer_get_string(&m, NULL); 804 buffer_append(&loginmsg, msg, strlen(msg)); 805 xfree(msg); 806 807 buffer_free(&m); 808 809 debug3("%s returning %d", __func__, ret); 810 811 return (ret); 812 } 813 814 void * 815 mm_sshpam_init_ctx(Authctxt *authctxt) 816 { 817 Buffer m; 818 int success; 819 820 debug3("%s", __func__); 821 buffer_init(&m); 822 buffer_put_cstring(&m, authctxt->user); 823 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); 824 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); 825 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); 826 success = buffer_get_int(&m); 827 if (success == 0) { 828 debug3("%s: pam_init_ctx failed", __func__); 829 buffer_free(&m); 830 return (NULL); 831 } 832 buffer_free(&m); 833 return (authctxt); 834 } 835 836 int 837 mm_sshpam_query(void *ctx, char **name, char **info, 838 u_int *num, char ***prompts, u_int **echo_on) 839 { 840 Buffer m; 841 u_int i; 842 int ret; 843 844 debug3("%s", __func__); 845 buffer_init(&m); 846 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); 847 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); 848 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); 849 ret = buffer_get_int(&m); 850 debug3("%s: pam_query returned %d", __func__, ret); 851 *name = buffer_get_string(&m, NULL); 852 *info = buffer_get_string(&m, NULL); 853 *num = buffer_get_int(&m); 854 if (*num > PAM_MAX_NUM_MSG) 855 fatal("%s: recieved %u PAM messages, expected <= %u", 856 __func__, *num, PAM_MAX_NUM_MSG); 857 *prompts = xcalloc((*num + 1), sizeof(char *)); 858 *echo_on = xcalloc((*num + 1), sizeof(u_int)); 859 for (i = 0; i < *num; ++i) { 860 (*prompts)[i] = buffer_get_string(&m, NULL); 861 (*echo_on)[i] = buffer_get_int(&m); 862 } 863 buffer_free(&m); 864 return (ret); 865 } 866 867 int 868 mm_sshpam_respond(void *ctx, u_int num, char **resp) 869 { 870 Buffer m; 871 u_int i; 872 int ret; 873 874 debug3("%s", __func__); 875 buffer_init(&m); 876 buffer_put_int(&m, num); 877 for (i = 0; i < num; ++i) 878 buffer_put_cstring(&m, resp[i]); 879 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); 880 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); 881 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); 882 ret = buffer_get_int(&m); 883 debug3("%s: pam_respond returned %d", __func__, ret); 884 buffer_free(&m); 885 return (ret); 886 } 887 888 void 889 mm_sshpam_free_ctx(void *ctxtp) 890 { 891 Buffer m; 892 893 debug3("%s", __func__); 894 buffer_init(&m); 895 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); 896 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); 897 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); 898 buffer_free(&m); 899 } 900 #endif /* USE_PAM */ 901 902 /* Request process termination */ 903 904 void 905 mm_terminate(void) 906 { 907 Buffer m; 908 909 buffer_init(&m); 910 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 911 buffer_free(&m); 912 } 913 914 int 915 mm_ssh1_session_key(BIGNUM *num) 916 { 917 int rsafail; 918 Buffer m; 919 920 buffer_init(&m); 921 buffer_put_bignum2(&m, num); 922 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); 923 924 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); 925 926 rsafail = buffer_get_int(&m); 927 buffer_get_bignum2(&m, num); 928 929 buffer_free(&m); 930 931 return (rsafail); 932 } 933 934 static void 935 mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 936 char ***prompts, u_int **echo_on) 937 { 938 *name = xstrdup(""); 939 *infotxt = xstrdup(""); 940 *numprompts = 1; 941 *prompts = xcalloc(*numprompts, sizeof(char *)); 942 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 943 (*echo_on)[0] = 0; 944 } 945 946 int 947 mm_bsdauth_query(void *ctx, char **name, char **infotxt, 948 u_int *numprompts, char ***prompts, u_int **echo_on) 949 { 950 Buffer m; 951 u_int success; 952 char *challenge; 953 954 debug3("%s: entering", __func__); 955 956 buffer_init(&m); 957 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 958 959 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 960 &m); 961 success = buffer_get_int(&m); 962 if (success == 0) { 963 debug3("%s: no challenge", __func__); 964 buffer_free(&m); 965 return (-1); 966 } 967 968 /* Get the challenge, and format the response */ 969 challenge = buffer_get_string(&m, NULL); 970 buffer_free(&m); 971 972 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 973 (*prompts)[0] = challenge; 974 975 debug3("%s: received challenge: %s", __func__, challenge); 976 977 return (0); 978 } 979 980 int 981 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 982 { 983 Buffer m; 984 int authok; 985 986 debug3("%s: entering", __func__); 987 if (numresponses != 1) 988 return (-1); 989 990 buffer_init(&m); 991 buffer_put_cstring(&m, responses[0]); 992 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 993 994 mm_request_receive_expect(pmonitor->m_recvfd, 995 MONITOR_ANS_BSDAUTHRESPOND, &m); 996 997 authok = buffer_get_int(&m); 998 buffer_free(&m); 999 1000 return ((authok == 0) ? -1 : 0); 1001 } 1002 1003 #ifdef SKEY 1004 int 1005 mm_skey_query(void *ctx, char **name, char **infotxt, 1006 u_int *numprompts, char ***prompts, u_int **echo_on) 1007 { 1008 Buffer m; 1009 u_int success; 1010 char *challenge; 1011 1012 debug3("%s: entering", __func__); 1013 1014 buffer_init(&m); 1015 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); 1016 1017 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, 1018 &m); 1019 success = buffer_get_int(&m); 1020 if (success == 0) { 1021 debug3("%s: no challenge", __func__); 1022 buffer_free(&m); 1023 return (-1); 1024 } 1025 1026 /* Get the challenge, and format the response */ 1027 challenge = buffer_get_string(&m, NULL); 1028 buffer_free(&m); 1029 1030 debug3("%s: received challenge: %s", __func__, challenge); 1031 1032 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 1033 1034 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); 1035 xfree(challenge); 1036 1037 return (0); 1038 } 1039 1040 int 1041 mm_skey_respond(void *ctx, u_int numresponses, char **responses) 1042 { 1043 Buffer m; 1044 int authok; 1045 1046 debug3("%s: entering", __func__); 1047 if (numresponses != 1) 1048 return (-1); 1049 1050 buffer_init(&m); 1051 buffer_put_cstring(&m, responses[0]); 1052 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); 1053 1054 mm_request_receive_expect(pmonitor->m_recvfd, 1055 MONITOR_ANS_SKEYRESPOND, &m); 1056 1057 authok = buffer_get_int(&m); 1058 buffer_free(&m); 1059 1060 return ((authok == 0) ? -1 : 0); 1061 } 1062 #endif /* SKEY */ 1063 1064 void 1065 mm_ssh1_session_id(u_char session_id[16]) 1066 { 1067 Buffer m; 1068 int i; 1069 1070 debug3("%s entering", __func__); 1071 1072 buffer_init(&m); 1073 for (i = 0; i < 16; i++) 1074 buffer_put_char(&m, session_id[i]); 1075 1076 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); 1077 buffer_free(&m); 1078 } 1079 1080 int 1081 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) 1082 { 1083 Buffer m; 1084 Key *key; 1085 u_char *blob; 1086 u_int blen; 1087 int allowed = 0, have_forced = 0; 1088 1089 debug3("%s entering", __func__); 1090 1091 buffer_init(&m); 1092 buffer_put_bignum2(&m, client_n); 1093 1094 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); 1095 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); 1096 1097 allowed = buffer_get_int(&m); 1098 1099 /* fake forced command */ 1100 auth_clear_options(); 1101 have_forced = buffer_get_int(&m); 1102 forced_command = have_forced ? xstrdup("true") : NULL; 1103 1104 if (allowed && rkey != NULL) { 1105 blob = buffer_get_string(&m, &blen); 1106 if ((key = key_from_blob(blob, blen)) == NULL) 1107 fatal("%s: key_from_blob failed", __func__); 1108 *rkey = key; 1109 xfree(blob); 1110 } 1111 buffer_free(&m); 1112 1113 return (allowed); 1114 } 1115 1116 BIGNUM * 1117 mm_auth_rsa_generate_challenge(Key *key) 1118 { 1119 Buffer m; 1120 BIGNUM *challenge; 1121 u_char *blob; 1122 u_int blen; 1123 1124 debug3("%s entering", __func__); 1125 1126 if ((challenge = BN_new()) == NULL) 1127 fatal("%s: BN_new failed", __func__); 1128 1129 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1130 if (key_to_blob(key, &blob, &blen) == 0) 1131 fatal("%s: key_to_blob failed", __func__); 1132 key->type = KEY_RSA1; 1133 1134 buffer_init(&m); 1135 buffer_put_string(&m, blob, blen); 1136 xfree(blob); 1137 1138 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); 1139 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); 1140 1141 buffer_get_bignum2(&m, challenge); 1142 buffer_free(&m); 1143 1144 return (challenge); 1145 } 1146 1147 int 1148 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) 1149 { 1150 Buffer m; 1151 u_char *blob; 1152 u_int blen; 1153 int success = 0; 1154 1155 debug3("%s entering", __func__); 1156 1157 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1158 if (key_to_blob(key, &blob, &blen) == 0) 1159 fatal("%s: key_to_blob failed", __func__); 1160 key->type = KEY_RSA1; 1161 1162 buffer_init(&m); 1163 buffer_put_string(&m, blob, blen); 1164 buffer_put_string(&m, response, 16); 1165 xfree(blob); 1166 1167 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); 1168 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); 1169 1170 success = buffer_get_int(&m); 1171 buffer_free(&m); 1172 1173 return (success); 1174 } 1175 1176 #ifdef SSH_AUDIT_EVENTS 1177 void 1178 mm_audit_event(ssh_audit_event_t event) 1179 { 1180 Buffer m; 1181 1182 debug3("%s entering", __func__); 1183 1184 buffer_init(&m); 1185 buffer_put_int(&m, event); 1186 1187 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); 1188 buffer_free(&m); 1189 } 1190 1191 void 1192 mm_audit_run_command(const char *command) 1193 { 1194 Buffer m; 1195 1196 debug3("%s entering command %s", __func__, command); 1197 1198 buffer_init(&m); 1199 buffer_put_cstring(&m, command); 1200 1201 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); 1202 buffer_free(&m); 1203 } 1204 #endif /* SSH_AUDIT_EVENTS */ 1205 1206 #ifdef GSSAPI 1207 OM_uint32 1208 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 1209 { 1210 Buffer m; 1211 OM_uint32 major; 1212 1213 /* Client doesn't get to see the context */ 1214 *ctx = NULL; 1215 1216 buffer_init(&m); 1217 buffer_put_string(&m, goid->elements, goid->length); 1218 1219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 1220 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 1221 1222 major = buffer_get_int(&m); 1223 1224 buffer_free(&m); 1225 return (major); 1226 } 1227 1228 OM_uint32 1229 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 1230 gss_buffer_desc *out, OM_uint32 *flags) 1231 { 1232 Buffer m; 1233 OM_uint32 major; 1234 u_int len; 1235 1236 buffer_init(&m); 1237 buffer_put_string(&m, in->value, in->length); 1238 1239 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 1240 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 1241 1242 major = buffer_get_int(&m); 1243 out->value = buffer_get_string(&m, &len); 1244 out->length = len; 1245 if (flags) 1246 *flags = buffer_get_int(&m); 1247 1248 buffer_free(&m); 1249 1250 return (major); 1251 } 1252 1253 OM_uint32 1254 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 1255 { 1256 Buffer m; 1257 OM_uint32 major; 1258 1259 buffer_init(&m); 1260 buffer_put_string(&m, gssbuf->value, gssbuf->length); 1261 buffer_put_string(&m, gssmic->value, gssmic->length); 1262 1263 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 1264 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 1265 &m); 1266 1267 major = buffer_get_int(&m); 1268 buffer_free(&m); 1269 return(major); 1270 } 1271 1272 int 1273 mm_ssh_gssapi_userok(char *user) 1274 { 1275 Buffer m; 1276 int authenticated = 0; 1277 1278 buffer_init(&m); 1279 1280 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 1281 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 1282 &m); 1283 1284 authenticated = buffer_get_int(&m); 1285 1286 buffer_free(&m); 1287 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 1288 return (authenticated); 1289 } 1290 #endif /* GSSAPI */ 1291 1292 #ifdef JPAKE 1293 void 1294 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, 1295 char **hash_scheme, char **salt) 1296 { 1297 Buffer m; 1298 1299 debug3("%s entering", __func__); 1300 1301 buffer_init(&m); 1302 mm_request_send(pmonitor->m_recvfd, 1303 MONITOR_REQ_JPAKE_GET_PWDATA, &m); 1304 1305 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); 1306 mm_request_receive_expect(pmonitor->m_recvfd, 1307 MONITOR_ANS_JPAKE_GET_PWDATA, &m); 1308 1309 *hash_scheme = buffer_get_string(&m, NULL); 1310 *salt = buffer_get_string(&m, NULL); 1311 1312 buffer_free(&m); 1313 } 1314 1315 void 1316 mm_jpake_step1(struct modp_group *grp, 1317 u_char **id, u_int *id_len, 1318 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, 1319 u_char **priv1_proof, u_int *priv1_proof_len, 1320 u_char **priv2_proof, u_int *priv2_proof_len) 1321 { 1322 Buffer m; 1323 1324 debug3("%s entering", __func__); 1325 1326 buffer_init(&m); 1327 mm_request_send(pmonitor->m_recvfd, 1328 MONITOR_REQ_JPAKE_STEP1, &m); 1329 1330 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); 1331 mm_request_receive_expect(pmonitor->m_recvfd, 1332 MONITOR_ANS_JPAKE_STEP1, &m); 1333 1334 if ((*priv1 = BN_new()) == NULL || 1335 (*priv2 = BN_new()) == NULL || 1336 (*g_priv1 = BN_new()) == NULL || 1337 (*g_priv2 = BN_new()) == NULL) 1338 fatal("%s: BN_new", __func__); 1339 1340 *id = buffer_get_string(&m, id_len); 1341 /* priv1 and priv2 are, well, private */ 1342 buffer_get_bignum2(&m, *g_priv1); 1343 buffer_get_bignum2(&m, *g_priv2); 1344 *priv1_proof = buffer_get_string(&m, priv1_proof_len); 1345 *priv2_proof = buffer_get_string(&m, priv2_proof_len); 1346 1347 buffer_free(&m); 1348 } 1349 1350 void 1351 mm_jpake_step2(struct modp_group *grp, BIGNUM *s, 1352 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, 1353 const u_char *theirid, u_int theirid_len, 1354 const u_char *myid, u_int myid_len, 1355 const u_char *theirpub1_proof, u_int theirpub1_proof_len, 1356 const u_char *theirpub2_proof, u_int theirpub2_proof_len, 1357 BIGNUM **newpub, 1358 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) 1359 { 1360 Buffer m; 1361 1362 debug3("%s entering", __func__); 1363 1364 buffer_init(&m); 1365 /* monitor already has all bignums except theirpub1, theirpub2 */ 1366 buffer_put_bignum2(&m, theirpub1); 1367 buffer_put_bignum2(&m, theirpub2); 1368 /* monitor already knows our id */ 1369 buffer_put_string(&m, theirid, theirid_len); 1370 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); 1371 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); 1372 1373 mm_request_send(pmonitor->m_recvfd, 1374 MONITOR_REQ_JPAKE_STEP2, &m); 1375 1376 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); 1377 mm_request_receive_expect(pmonitor->m_recvfd, 1378 MONITOR_ANS_JPAKE_STEP2, &m); 1379 1380 if ((*newpub = BN_new()) == NULL) 1381 fatal("%s: BN_new", __func__); 1382 1383 buffer_get_bignum2(&m, *newpub); 1384 *newpub_exponent_proof = buffer_get_string(&m, 1385 newpub_exponent_proof_len); 1386 1387 buffer_free(&m); 1388 } 1389 1390 void 1391 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val, 1392 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, 1393 BIGNUM *theirpub1, BIGNUM *theirpub2, 1394 const u_char *my_id, u_int my_id_len, 1395 const u_char *their_id, u_int their_id_len, 1396 const u_char *sess_id, u_int sess_id_len, 1397 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, 1398 BIGNUM **k, 1399 u_char **confirm_hash, u_int *confirm_hash_len) 1400 { 1401 Buffer m; 1402 1403 debug3("%s entering", __func__); 1404 1405 buffer_init(&m); 1406 /* monitor already has all bignums except step2_val */ 1407 buffer_put_bignum2(&m, step2_val); 1408 /* monitor already knows all the ids */ 1409 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); 1410 1411 mm_request_send(pmonitor->m_recvfd, 1412 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); 1413 1414 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); 1415 mm_request_receive_expect(pmonitor->m_recvfd, 1416 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); 1417 1418 /* 'k' is sensitive and stays in the monitor */ 1419 *confirm_hash = buffer_get_string(&m, confirm_hash_len); 1420 1421 buffer_free(&m); 1422 } 1423 1424 int 1425 mm_jpake_check_confirm(const BIGNUM *k, 1426 const u_char *peer_id, u_int peer_id_len, 1427 const u_char *sess_id, u_int sess_id_len, 1428 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) 1429 { 1430 Buffer m; 1431 int success = 0; 1432 1433 debug3("%s entering", __func__); 1434 1435 buffer_init(&m); 1436 /* k is dummy in slave, ignored */ 1437 /* monitor knows all the ids */ 1438 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); 1439 mm_request_send(pmonitor->m_recvfd, 1440 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); 1441 1442 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); 1443 mm_request_receive_expect(pmonitor->m_recvfd, 1444 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); 1445 1446 success = buffer_get_int(&m); 1447 buffer_free(&m); 1448 1449 debug3("%s: success = %d", __func__, success); 1450 return success; 1451 } 1452 #endif /* JPAKE */ 1453