1 /* $OpenBSD: monitor_wrap.c,v 1.69 2010/03/07 11:57:13 dtucker Exp $ */ 2 /* 3 * Copyright 2002 Niels Provos <provos@citi.umich.edu> 4 * Copyright 2002 Markus Friedl <markus@openbsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "includes.h" 29 30 #include <sys/types.h> 31 #include <sys/uio.h> 32 33 #include <errno.h> 34 #include <pwd.h> 35 #include <signal.h> 36 #include <stdarg.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 #include <openssl/bn.h> 42 #include <openssl/dh.h> 43 #include <openssl/evp.h> 44 45 #include "openbsd-compat/sys-queue.h" 46 #include "xmalloc.h" 47 #include "ssh.h" 48 #include "dh.h" 49 #include "buffer.h" 50 #include "key.h" 51 #include "cipher.h" 52 #include "kex.h" 53 #include "hostfile.h" 54 #include "auth.h" 55 #include "auth-options.h" 56 #include "packet.h" 57 #include "mac.h" 58 #include "log.h" 59 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ 60 #undef TARGET_OS_MAC 61 #include "zlib.h" 62 #define TARGET_OS_MAC 1 63 #else 64 #include "zlib.h" 65 #endif 66 #include "monitor.h" 67 #ifdef GSSAPI 68 #include "ssh-gss.h" 69 #endif 70 #include "monitor_wrap.h" 71 #include "atomicio.h" 72 #include "monitor_fdpass.h" 73 #include "misc.h" 74 #include "schnorr.h" 75 #include "jpake.h" 76 77 #include "channels.h" 78 #include "session.h" 79 #include "servconf.h" 80 #include "roaming.h" 81 82 /* Imports */ 83 extern int compat20; 84 extern z_stream incoming_stream; 85 extern z_stream outgoing_stream; 86 extern struct monitor *pmonitor; 87 extern Buffer loginmsg; 88 extern ServerOptions options; 89 90 int 91 mm_is_monitor(void) 92 { 93 /* 94 * m_pid is only set in the privileged part, and 95 * points to the unprivileged child. 96 */ 97 return (pmonitor && pmonitor->m_pid > 0); 98 } 99 100 void 101 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) 102 { 103 u_int mlen = buffer_len(m); 104 u_char buf[5]; 105 106 debug3("%s entering: type %d", __func__, type); 107 108 put_u32(buf, mlen + 1); 109 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ 110 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) 111 fatal("%s: write: %s", __func__, strerror(errno)); 112 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) 113 fatal("%s: write: %s", __func__, strerror(errno)); 114 } 115 116 void 117 mm_request_receive(int sock, Buffer *m) 118 { 119 u_char buf[4]; 120 u_int msg_len; 121 122 debug3("%s entering", __func__); 123 124 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { 125 if (errno == EPIPE) 126 cleanup_exit(255); 127 fatal("%s: read: %s", __func__, strerror(errno)); 128 } 129 msg_len = get_u32(buf); 130 if (msg_len > 256 * 1024) 131 fatal("%s: read: bad msg_len %d", __func__, msg_len); 132 buffer_clear(m); 133 buffer_append_space(m, msg_len); 134 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) 135 fatal("%s: read: %s", __func__, strerror(errno)); 136 } 137 138 void 139 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) 140 { 141 u_char rtype; 142 143 debug3("%s entering: type %d", __func__, type); 144 145 mm_request_receive(sock, m); 146 rtype = buffer_get_char(m); 147 if (rtype != type) 148 fatal("%s: read: rtype %d != type %d", __func__, 149 rtype, type); 150 } 151 152 DH * 153 mm_choose_dh(int min, int nbits, int max) 154 { 155 BIGNUM *p, *g; 156 int success = 0; 157 Buffer m; 158 159 buffer_init(&m); 160 buffer_put_int(&m, min); 161 buffer_put_int(&m, nbits); 162 buffer_put_int(&m, max); 163 164 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); 165 166 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); 167 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); 168 169 success = buffer_get_char(&m); 170 if (success == 0) 171 fatal("%s: MONITOR_ANS_MODULI failed", __func__); 172 173 if ((p = BN_new()) == NULL) 174 fatal("%s: BN_new failed", __func__); 175 if ((g = BN_new()) == NULL) 176 fatal("%s: BN_new failed", __func__); 177 buffer_get_bignum2(&m, p); 178 buffer_get_bignum2(&m, g); 179 180 debug3("%s: remaining %d", __func__, buffer_len(&m)); 181 buffer_free(&m); 182 183 return (dh_new_group(g, p)); 184 } 185 186 int 187 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) 188 { 189 Kex *kex = *pmonitor->m_pkex; 190 Buffer m; 191 192 debug3("%s entering", __func__); 193 194 buffer_init(&m); 195 buffer_put_int(&m, kex->host_key_index(key)); 196 buffer_put_string(&m, data, datalen); 197 198 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); 199 200 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); 201 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); 202 *sigp = buffer_get_string(&m, lenp); 203 buffer_free(&m); 204 205 return (0); 206 } 207 208 struct passwd * 209 mm_getpwnamallow(const char *username) 210 { 211 Buffer m; 212 struct passwd *pw; 213 u_int len; 214 ServerOptions *newopts; 215 216 debug3("%s entering", __func__); 217 218 buffer_init(&m); 219 buffer_put_cstring(&m, username); 220 221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); 222 223 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); 224 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); 225 226 if (buffer_get_char(&m) == 0) { 227 pw = NULL; 228 goto out; 229 } 230 pw = buffer_get_string(&m, &len); 231 if (len != sizeof(struct passwd)) 232 fatal("%s: struct passwd size mismatch", __func__); 233 pw->pw_name = buffer_get_string(&m, NULL); 234 pw->pw_passwd = buffer_get_string(&m, NULL); 235 pw->pw_gecos = buffer_get_string(&m, NULL); 236 #ifdef HAVE_PW_CLASS_IN_PASSWD 237 pw->pw_class = buffer_get_string(&m, NULL); 238 #endif 239 pw->pw_dir = buffer_get_string(&m, NULL); 240 pw->pw_shell = buffer_get_string(&m, NULL); 241 242 out: 243 /* copy options block as a Match directive may have changed some */ 244 newopts = buffer_get_string(&m, &len); 245 if (len != sizeof(*newopts)) 246 fatal("%s: option block size mismatch", __func__); 247 if (newopts->banner != NULL) 248 newopts->banner = buffer_get_string(&m, NULL); 249 copy_set_server_options(&options, newopts, 1); 250 xfree(newopts); 251 252 buffer_free(&m); 253 254 return (pw); 255 } 256 257 char * 258 mm_auth2_read_banner(void) 259 { 260 Buffer m; 261 char *banner; 262 263 debug3("%s entering", __func__); 264 265 buffer_init(&m); 266 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 267 buffer_clear(&m); 268 269 mm_request_receive_expect(pmonitor->m_recvfd, 270 MONITOR_ANS_AUTH2_READ_BANNER, &m); 271 banner = buffer_get_string(&m, NULL); 272 buffer_free(&m); 273 274 /* treat empty banner as missing banner */ 275 if (strlen(banner) == 0) { 276 xfree(banner); 277 banner = NULL; 278 } 279 return (banner); 280 } 281 282 /* Inform the privileged process about service and style */ 283 284 void 285 mm_inform_authserv(char *service, char *style) 286 { 287 Buffer m; 288 289 debug3("%s entering", __func__); 290 291 buffer_init(&m); 292 buffer_put_cstring(&m, service); 293 buffer_put_cstring(&m, style ? style : ""); 294 295 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 296 297 buffer_free(&m); 298 } 299 300 /* Do the password authentication */ 301 int 302 mm_auth_password(Authctxt *authctxt, char *password) 303 { 304 Buffer m; 305 int authenticated = 0; 306 307 debug3("%s entering", __func__); 308 309 buffer_init(&m); 310 buffer_put_cstring(&m, password); 311 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 312 313 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 314 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 315 316 authenticated = buffer_get_int(&m); 317 318 buffer_free(&m); 319 320 debug3("%s: user %sauthenticated", 321 __func__, authenticated ? "" : "not "); 322 return (authenticated); 323 } 324 325 int 326 mm_user_key_allowed(struct passwd *pw, Key *key) 327 { 328 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); 329 } 330 331 int 332 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, 333 Key *key) 334 { 335 return (mm_key_allowed(MM_HOSTKEY, user, host, key)); 336 } 337 338 int 339 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, 340 char *host, Key *key) 341 { 342 int ret; 343 344 key->type = KEY_RSA; /* XXX hack for key_to_blob */ 345 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); 346 key->type = KEY_RSA1; 347 return (ret); 348 } 349 350 int 351 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) 352 { 353 Buffer m; 354 u_char *blob; 355 u_int len; 356 int allowed = 0, have_forced = 0; 357 358 debug3("%s entering", __func__); 359 360 /* Convert the key to a blob and the pass it over */ 361 if (!key_to_blob(key, &blob, &len)) 362 return (0); 363 364 buffer_init(&m); 365 buffer_put_int(&m, type); 366 buffer_put_cstring(&m, user ? user : ""); 367 buffer_put_cstring(&m, host ? host : ""); 368 buffer_put_string(&m, blob, len); 369 xfree(blob); 370 371 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 372 373 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 374 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 375 376 allowed = buffer_get_int(&m); 377 378 /* fake forced command */ 379 auth_clear_options(); 380 have_forced = buffer_get_int(&m); 381 forced_command = have_forced ? xstrdup("true") : NULL; 382 383 buffer_free(&m); 384 385 return (allowed); 386 } 387 388 /* 389 * This key verify needs to send the key type along, because the 390 * privileged parent makes the decision if the key is allowed 391 * for authentication. 392 */ 393 394 int 395 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) 396 { 397 Buffer m; 398 u_char *blob; 399 u_int len; 400 int verified = 0; 401 402 debug3("%s entering", __func__); 403 404 /* Convert the key to a blob and the pass it over */ 405 if (!key_to_blob(key, &blob, &len)) 406 return (0); 407 408 buffer_init(&m); 409 buffer_put_string(&m, blob, len); 410 buffer_put_string(&m, sig, siglen); 411 buffer_put_string(&m, data, datalen); 412 xfree(blob); 413 414 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 415 416 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 417 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 418 419 verified = buffer_get_int(&m); 420 421 buffer_free(&m); 422 423 return (verified); 424 } 425 426 /* Export key state after authentication */ 427 Newkeys * 428 mm_newkeys_from_blob(u_char *blob, int blen) 429 { 430 Buffer b; 431 u_int len; 432 Newkeys *newkey = NULL; 433 Enc *enc; 434 Mac *mac; 435 Comp *comp; 436 437 debug3("%s: %p(%d)", __func__, blob, blen); 438 #ifdef DEBUG_PK 439 dump_base64(stderr, blob, blen); 440 #endif 441 buffer_init(&b); 442 buffer_append(&b, blob, blen); 443 444 newkey = xmalloc(sizeof(*newkey)); 445 enc = &newkey->enc; 446 mac = &newkey->mac; 447 comp = &newkey->comp; 448 449 /* Enc structure */ 450 enc->name = buffer_get_string(&b, NULL); 451 buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); 452 enc->enabled = buffer_get_int(&b); 453 enc->block_size = buffer_get_int(&b); 454 enc->key = buffer_get_string(&b, &enc->key_len); 455 enc->iv = buffer_get_string(&b, &len); 456 if (len != enc->block_size) 457 fatal("%s: bad ivlen: expected %u != %u", __func__, 458 enc->block_size, len); 459 460 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) 461 fatal("%s: bad cipher name %s or pointer %p", __func__, 462 enc->name, enc->cipher); 463 464 /* Mac structure */ 465 mac->name = buffer_get_string(&b, NULL); 466 if (mac->name == NULL || mac_setup(mac, mac->name) == -1) 467 fatal("%s: can not setup mac %s", __func__, mac->name); 468 mac->enabled = buffer_get_int(&b); 469 mac->key = buffer_get_string(&b, &len); 470 if (len > mac->key_len) 471 fatal("%s: bad mac key length: %u > %d", __func__, len, 472 mac->key_len); 473 mac->key_len = len; 474 475 /* Comp structure */ 476 comp->type = buffer_get_int(&b); 477 comp->enabled = buffer_get_int(&b); 478 comp->name = buffer_get_string(&b, NULL); 479 480 len = buffer_len(&b); 481 if (len != 0) 482 error("newkeys_from_blob: remaining bytes in blob %u", len); 483 buffer_free(&b); 484 return (newkey); 485 } 486 487 int 488 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) 489 { 490 Buffer b; 491 int len; 492 Enc *enc; 493 Mac *mac; 494 Comp *comp; 495 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode); 496 497 debug3("%s: converting %p", __func__, newkey); 498 499 if (newkey == NULL) { 500 error("%s: newkey == NULL", __func__); 501 return 0; 502 } 503 enc = &newkey->enc; 504 mac = &newkey->mac; 505 comp = &newkey->comp; 506 507 buffer_init(&b); 508 /* Enc structure */ 509 buffer_put_cstring(&b, enc->name); 510 /* The cipher struct is constant and shared, you export pointer */ 511 buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); 512 buffer_put_int(&b, enc->enabled); 513 buffer_put_int(&b, enc->block_size); 514 buffer_put_string(&b, enc->key, enc->key_len); 515 packet_get_keyiv(mode, enc->iv, enc->block_size); 516 buffer_put_string(&b, enc->iv, enc->block_size); 517 518 /* Mac structure */ 519 buffer_put_cstring(&b, mac->name); 520 buffer_put_int(&b, mac->enabled); 521 buffer_put_string(&b, mac->key, mac->key_len); 522 523 /* Comp structure */ 524 buffer_put_int(&b, comp->type); 525 buffer_put_int(&b, comp->enabled); 526 buffer_put_cstring(&b, comp->name); 527 528 len = buffer_len(&b); 529 if (lenp != NULL) 530 *lenp = len; 531 if (blobp != NULL) { 532 *blobp = xmalloc(len); 533 memcpy(*blobp, buffer_ptr(&b), len); 534 } 535 memset(buffer_ptr(&b), 0, len); 536 buffer_free(&b); 537 return len; 538 } 539 540 static void 541 mm_send_kex(Buffer *m, Kex *kex) 542 { 543 buffer_put_string(m, kex->session_id, kex->session_id_len); 544 buffer_put_int(m, kex->we_need); 545 buffer_put_int(m, kex->hostkey_type); 546 buffer_put_int(m, kex->kex_type); 547 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); 548 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); 549 buffer_put_int(m, kex->flags); 550 buffer_put_cstring(m, kex->client_version_string); 551 buffer_put_cstring(m, kex->server_version_string); 552 } 553 554 void 555 mm_send_keystate(struct monitor *monitor) 556 { 557 Buffer m, *input, *output; 558 u_char *blob, *p; 559 u_int bloblen, plen; 560 u_int32_t seqnr, packets; 561 u_int64_t blocks, bytes; 562 563 buffer_init(&m); 564 565 if (!compat20) { 566 u_char iv[24]; 567 u_char *key; 568 u_int ivlen, keylen; 569 570 buffer_put_int(&m, packet_get_protocol_flags()); 571 572 buffer_put_int(&m, packet_get_ssh1_cipher()); 573 574 debug3("%s: Sending ssh1 KEY+IV", __func__); 575 keylen = packet_get_encryption_key(NULL); 576 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ 577 keylen = packet_get_encryption_key(key); 578 buffer_put_string(&m, key, keylen); 579 memset(key, 0, keylen); 580 xfree(key); 581 582 ivlen = packet_get_keyiv_len(MODE_OUT); 583 packet_get_keyiv(MODE_OUT, iv, ivlen); 584 buffer_put_string(&m, iv, ivlen); 585 ivlen = packet_get_keyiv_len(MODE_OUT); 586 packet_get_keyiv(MODE_IN, iv, ivlen); 587 buffer_put_string(&m, iv, ivlen); 588 goto skip; 589 } else { 590 /* Kex for rekeying */ 591 mm_send_kex(&m, *monitor->m_pkex); 592 } 593 594 debug3("%s: Sending new keys: %p %p", 595 __func__, packet_get_newkeys(MODE_OUT), 596 packet_get_newkeys(MODE_IN)); 597 598 /* Keys from Kex */ 599 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) 600 fatal("%s: conversion of newkeys failed", __func__); 601 602 buffer_put_string(&m, blob, bloblen); 603 xfree(blob); 604 605 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) 606 fatal("%s: conversion of newkeys failed", __func__); 607 608 buffer_put_string(&m, blob, bloblen); 609 xfree(blob); 610 611 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); 612 buffer_put_int(&m, seqnr); 613 buffer_put_int64(&m, blocks); 614 buffer_put_int(&m, packets); 615 buffer_put_int64(&m, bytes); 616 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); 617 buffer_put_int(&m, seqnr); 618 buffer_put_int64(&m, blocks); 619 buffer_put_int(&m, packets); 620 buffer_put_int64(&m, bytes); 621 622 debug3("%s: New keys have been sent", __func__); 623 skip: 624 /* More key context */ 625 plen = packet_get_keycontext(MODE_OUT, NULL); 626 p = xmalloc(plen+1); 627 packet_get_keycontext(MODE_OUT, p); 628 buffer_put_string(&m, p, plen); 629 xfree(p); 630 631 plen = packet_get_keycontext(MODE_IN, NULL); 632 p = xmalloc(plen+1); 633 packet_get_keycontext(MODE_IN, p); 634 buffer_put_string(&m, p, plen); 635 xfree(p); 636 637 /* Compression state */ 638 debug3("%s: Sending compression state", __func__); 639 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); 640 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); 641 642 /* Network I/O buffers */ 643 input = (Buffer *)packet_get_input(); 644 output = (Buffer *)packet_get_output(); 645 buffer_put_string(&m, buffer_ptr(input), buffer_len(input)); 646 buffer_put_string(&m, buffer_ptr(output), buffer_len(output)); 647 648 /* Roaming */ 649 if (compat20) { 650 buffer_put_int64(&m, get_sent_bytes()); 651 buffer_put_int64(&m, get_recv_bytes()); 652 } 653 654 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); 655 debug3("%s: Finished sending state", __func__); 656 657 buffer_free(&m); 658 } 659 660 int 661 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 662 { 663 Buffer m; 664 char *p, *msg; 665 int success = 0, tmp1 = -1, tmp2 = -1; 666 667 /* Kludge: ensure there are fds free to receive the pty/tty */ 668 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 669 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 670 error("%s: cannot allocate fds for pty", __func__); 671 if (tmp1 > 0) 672 close(tmp1); 673 if (tmp2 > 0) 674 close(tmp2); 675 return 0; 676 } 677 close(tmp1); 678 close(tmp2); 679 680 buffer_init(&m); 681 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 682 683 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 684 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 685 686 success = buffer_get_int(&m); 687 if (success == 0) { 688 debug3("%s: pty alloc failed", __func__); 689 buffer_free(&m); 690 return (0); 691 } 692 p = buffer_get_string(&m, NULL); 693 msg = buffer_get_string(&m, NULL); 694 buffer_free(&m); 695 696 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 697 xfree(p); 698 699 buffer_append(&loginmsg, msg, strlen(msg)); 700 xfree(msg); 701 702 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 703 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 704 fatal("%s: receive fds failed", __func__); 705 706 /* Success */ 707 return (1); 708 } 709 710 void 711 mm_session_pty_cleanup2(Session *s) 712 { 713 Buffer m; 714 715 if (s->ttyfd == -1) 716 return; 717 buffer_init(&m); 718 buffer_put_cstring(&m, s->tty); 719 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 720 buffer_free(&m); 721 722 /* closed dup'ed master */ 723 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 724 error("close(s->ptymaster/%d): %s", 725 s->ptymaster, strerror(errno)); 726 727 /* unlink pty from session */ 728 s->ttyfd = -1; 729 } 730 731 #ifdef USE_PAM 732 void 733 mm_start_pam(Authctxt *authctxt) 734 { 735 Buffer m; 736 737 debug3("%s entering", __func__); 738 if (!options.use_pam) 739 fatal("UsePAM=no, but ended up in %s anyway", __func__); 740 741 buffer_init(&m); 742 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); 743 744 buffer_free(&m); 745 } 746 747 u_int 748 mm_do_pam_account(void) 749 { 750 Buffer m; 751 u_int ret; 752 char *msg; 753 754 debug3("%s entering", __func__); 755 if (!options.use_pam) 756 fatal("UsePAM=no, but ended up in %s anyway", __func__); 757 758 buffer_init(&m); 759 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); 760 761 mm_request_receive_expect(pmonitor->m_recvfd, 762 MONITOR_ANS_PAM_ACCOUNT, &m); 763 ret = buffer_get_int(&m); 764 msg = buffer_get_string(&m, NULL); 765 buffer_append(&loginmsg, msg, strlen(msg)); 766 xfree(msg); 767 768 buffer_free(&m); 769 770 debug3("%s returning %d", __func__, ret); 771 772 return (ret); 773 } 774 775 void * 776 mm_sshpam_init_ctx(Authctxt *authctxt) 777 { 778 Buffer m; 779 int success; 780 781 debug3("%s", __func__); 782 buffer_init(&m); 783 buffer_put_cstring(&m, authctxt->user); 784 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); 785 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); 786 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); 787 success = buffer_get_int(&m); 788 if (success == 0) { 789 debug3("%s: pam_init_ctx failed", __func__); 790 buffer_free(&m); 791 return (NULL); 792 } 793 buffer_free(&m); 794 return (authctxt); 795 } 796 797 int 798 mm_sshpam_query(void *ctx, char **name, char **info, 799 u_int *num, char ***prompts, u_int **echo_on) 800 { 801 Buffer m; 802 u_int i; 803 int ret; 804 805 debug3("%s", __func__); 806 buffer_init(&m); 807 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); 808 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); 809 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); 810 ret = buffer_get_int(&m); 811 debug3("%s: pam_query returned %d", __func__, ret); 812 *name = buffer_get_string(&m, NULL); 813 *info = buffer_get_string(&m, NULL); 814 *num = buffer_get_int(&m); 815 if (*num > PAM_MAX_NUM_MSG) 816 fatal("%s: recieved %u PAM messages, expected <= %u", 817 __func__, *num, PAM_MAX_NUM_MSG); 818 *prompts = xcalloc((*num + 1), sizeof(char *)); 819 *echo_on = xcalloc((*num + 1), sizeof(u_int)); 820 for (i = 0; i < *num; ++i) { 821 (*prompts)[i] = buffer_get_string(&m, NULL); 822 (*echo_on)[i] = buffer_get_int(&m); 823 } 824 buffer_free(&m); 825 return (ret); 826 } 827 828 int 829 mm_sshpam_respond(void *ctx, u_int num, char **resp) 830 { 831 Buffer m; 832 u_int i; 833 int ret; 834 835 debug3("%s", __func__); 836 buffer_init(&m); 837 buffer_put_int(&m, num); 838 for (i = 0; i < num; ++i) 839 buffer_put_cstring(&m, resp[i]); 840 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); 841 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); 842 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); 843 ret = buffer_get_int(&m); 844 debug3("%s: pam_respond returned %d", __func__, ret); 845 buffer_free(&m); 846 return (ret); 847 } 848 849 void 850 mm_sshpam_free_ctx(void *ctxtp) 851 { 852 Buffer m; 853 854 debug3("%s", __func__); 855 buffer_init(&m); 856 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); 857 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); 858 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); 859 buffer_free(&m); 860 } 861 #endif /* USE_PAM */ 862 863 /* Request process termination */ 864 865 void 866 mm_terminate(void) 867 { 868 Buffer m; 869 870 buffer_init(&m); 871 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 872 buffer_free(&m); 873 } 874 875 int 876 mm_ssh1_session_key(BIGNUM *num) 877 { 878 int rsafail; 879 Buffer m; 880 881 buffer_init(&m); 882 buffer_put_bignum2(&m, num); 883 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); 884 885 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); 886 887 rsafail = buffer_get_int(&m); 888 buffer_get_bignum2(&m, num); 889 890 buffer_free(&m); 891 892 return (rsafail); 893 } 894 895 static void 896 mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 897 char ***prompts, u_int **echo_on) 898 { 899 *name = xstrdup(""); 900 *infotxt = xstrdup(""); 901 *numprompts = 1; 902 *prompts = xcalloc(*numprompts, sizeof(char *)); 903 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 904 (*echo_on)[0] = 0; 905 } 906 907 int 908 mm_bsdauth_query(void *ctx, char **name, char **infotxt, 909 u_int *numprompts, char ***prompts, u_int **echo_on) 910 { 911 Buffer m; 912 u_int success; 913 char *challenge; 914 915 debug3("%s: entering", __func__); 916 917 buffer_init(&m); 918 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 919 920 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 921 &m); 922 success = buffer_get_int(&m); 923 if (success == 0) { 924 debug3("%s: no challenge", __func__); 925 buffer_free(&m); 926 return (-1); 927 } 928 929 /* Get the challenge, and format the response */ 930 challenge = buffer_get_string(&m, NULL); 931 buffer_free(&m); 932 933 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 934 (*prompts)[0] = challenge; 935 936 debug3("%s: received challenge: %s", __func__, challenge); 937 938 return (0); 939 } 940 941 int 942 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 943 { 944 Buffer m; 945 int authok; 946 947 debug3("%s: entering", __func__); 948 if (numresponses != 1) 949 return (-1); 950 951 buffer_init(&m); 952 buffer_put_cstring(&m, responses[0]); 953 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 954 955 mm_request_receive_expect(pmonitor->m_recvfd, 956 MONITOR_ANS_BSDAUTHRESPOND, &m); 957 958 authok = buffer_get_int(&m); 959 buffer_free(&m); 960 961 return ((authok == 0) ? -1 : 0); 962 } 963 964 #ifdef SKEY 965 int 966 mm_skey_query(void *ctx, char **name, char **infotxt, 967 u_int *numprompts, char ***prompts, u_int **echo_on) 968 { 969 Buffer m; 970 u_int success; 971 char *challenge; 972 973 debug3("%s: entering", __func__); 974 975 buffer_init(&m); 976 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); 977 978 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, 979 &m); 980 success = buffer_get_int(&m); 981 if (success == 0) { 982 debug3("%s: no challenge", __func__); 983 buffer_free(&m); 984 return (-1); 985 } 986 987 /* Get the challenge, and format the response */ 988 challenge = buffer_get_string(&m, NULL); 989 buffer_free(&m); 990 991 debug3("%s: received challenge: %s", __func__, challenge); 992 993 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 994 995 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); 996 xfree(challenge); 997 998 return (0); 999 } 1000 1001 int 1002 mm_skey_respond(void *ctx, u_int numresponses, char **responses) 1003 { 1004 Buffer m; 1005 int authok; 1006 1007 debug3("%s: entering", __func__); 1008 if (numresponses != 1) 1009 return (-1); 1010 1011 buffer_init(&m); 1012 buffer_put_cstring(&m, responses[0]); 1013 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); 1014 1015 mm_request_receive_expect(pmonitor->m_recvfd, 1016 MONITOR_ANS_SKEYRESPOND, &m); 1017 1018 authok = buffer_get_int(&m); 1019 buffer_free(&m); 1020 1021 return ((authok == 0) ? -1 : 0); 1022 } 1023 #endif /* SKEY */ 1024 1025 void 1026 mm_ssh1_session_id(u_char session_id[16]) 1027 { 1028 Buffer m; 1029 int i; 1030 1031 debug3("%s entering", __func__); 1032 1033 buffer_init(&m); 1034 for (i = 0; i < 16; i++) 1035 buffer_put_char(&m, session_id[i]); 1036 1037 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); 1038 buffer_free(&m); 1039 } 1040 1041 int 1042 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) 1043 { 1044 Buffer m; 1045 Key *key; 1046 u_char *blob; 1047 u_int blen; 1048 int allowed = 0, have_forced = 0; 1049 1050 debug3("%s entering", __func__); 1051 1052 buffer_init(&m); 1053 buffer_put_bignum2(&m, client_n); 1054 1055 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); 1056 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); 1057 1058 allowed = buffer_get_int(&m); 1059 1060 /* fake forced command */ 1061 auth_clear_options(); 1062 have_forced = buffer_get_int(&m); 1063 forced_command = have_forced ? xstrdup("true") : NULL; 1064 1065 if (allowed && rkey != NULL) { 1066 blob = buffer_get_string(&m, &blen); 1067 if ((key = key_from_blob(blob, blen)) == NULL) 1068 fatal("%s: key_from_blob failed", __func__); 1069 *rkey = key; 1070 xfree(blob); 1071 } 1072 buffer_free(&m); 1073 1074 return (allowed); 1075 } 1076 1077 BIGNUM * 1078 mm_auth_rsa_generate_challenge(Key *key) 1079 { 1080 Buffer m; 1081 BIGNUM *challenge; 1082 u_char *blob; 1083 u_int blen; 1084 1085 debug3("%s entering", __func__); 1086 1087 if ((challenge = BN_new()) == NULL) 1088 fatal("%s: BN_new failed", __func__); 1089 1090 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1091 if (key_to_blob(key, &blob, &blen) == 0) 1092 fatal("%s: key_to_blob failed", __func__); 1093 key->type = KEY_RSA1; 1094 1095 buffer_init(&m); 1096 buffer_put_string(&m, blob, blen); 1097 xfree(blob); 1098 1099 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); 1100 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); 1101 1102 buffer_get_bignum2(&m, challenge); 1103 buffer_free(&m); 1104 1105 return (challenge); 1106 } 1107 1108 int 1109 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) 1110 { 1111 Buffer m; 1112 u_char *blob; 1113 u_int blen; 1114 int success = 0; 1115 1116 debug3("%s entering", __func__); 1117 1118 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1119 if (key_to_blob(key, &blob, &blen) == 0) 1120 fatal("%s: key_to_blob failed", __func__); 1121 key->type = KEY_RSA1; 1122 1123 buffer_init(&m); 1124 buffer_put_string(&m, blob, blen); 1125 buffer_put_string(&m, response, 16); 1126 xfree(blob); 1127 1128 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); 1129 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); 1130 1131 success = buffer_get_int(&m); 1132 buffer_free(&m); 1133 1134 return (success); 1135 } 1136 1137 #ifdef SSH_AUDIT_EVENTS 1138 void 1139 mm_audit_event(ssh_audit_event_t event) 1140 { 1141 Buffer m; 1142 1143 debug3("%s entering", __func__); 1144 1145 buffer_init(&m); 1146 buffer_put_int(&m, event); 1147 1148 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); 1149 buffer_free(&m); 1150 } 1151 1152 void 1153 mm_audit_run_command(const char *command) 1154 { 1155 Buffer m; 1156 1157 debug3("%s entering command %s", __func__, command); 1158 1159 buffer_init(&m); 1160 buffer_put_cstring(&m, command); 1161 1162 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); 1163 buffer_free(&m); 1164 } 1165 #endif /* SSH_AUDIT_EVENTS */ 1166 1167 #ifdef GSSAPI 1168 OM_uint32 1169 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 1170 { 1171 Buffer m; 1172 OM_uint32 major; 1173 1174 /* Client doesn't get to see the context */ 1175 *ctx = NULL; 1176 1177 buffer_init(&m); 1178 buffer_put_string(&m, goid->elements, goid->length); 1179 1180 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 1181 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 1182 1183 major = buffer_get_int(&m); 1184 1185 buffer_free(&m); 1186 return (major); 1187 } 1188 1189 OM_uint32 1190 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 1191 gss_buffer_desc *out, OM_uint32 *flags) 1192 { 1193 Buffer m; 1194 OM_uint32 major; 1195 u_int len; 1196 1197 buffer_init(&m); 1198 buffer_put_string(&m, in->value, in->length); 1199 1200 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 1201 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 1202 1203 major = buffer_get_int(&m); 1204 out->value = buffer_get_string(&m, &len); 1205 out->length = len; 1206 if (flags) 1207 *flags = buffer_get_int(&m); 1208 1209 buffer_free(&m); 1210 1211 return (major); 1212 } 1213 1214 OM_uint32 1215 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 1216 { 1217 Buffer m; 1218 OM_uint32 major; 1219 1220 buffer_init(&m); 1221 buffer_put_string(&m, gssbuf->value, gssbuf->length); 1222 buffer_put_string(&m, gssmic->value, gssmic->length); 1223 1224 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 1225 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 1226 &m); 1227 1228 major = buffer_get_int(&m); 1229 buffer_free(&m); 1230 return(major); 1231 } 1232 1233 int 1234 mm_ssh_gssapi_userok(char *user) 1235 { 1236 Buffer m; 1237 int authenticated = 0; 1238 1239 buffer_init(&m); 1240 1241 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 1242 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 1243 &m); 1244 1245 authenticated = buffer_get_int(&m); 1246 1247 buffer_free(&m); 1248 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 1249 return (authenticated); 1250 } 1251 #endif /* GSSAPI */ 1252 1253 #ifdef JPAKE 1254 void 1255 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, 1256 char **hash_scheme, char **salt) 1257 { 1258 Buffer m; 1259 1260 debug3("%s entering", __func__); 1261 1262 buffer_init(&m); 1263 mm_request_send(pmonitor->m_recvfd, 1264 MONITOR_REQ_JPAKE_GET_PWDATA, &m); 1265 1266 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); 1267 mm_request_receive_expect(pmonitor->m_recvfd, 1268 MONITOR_ANS_JPAKE_GET_PWDATA, &m); 1269 1270 *hash_scheme = buffer_get_string(&m, NULL); 1271 *salt = buffer_get_string(&m, NULL); 1272 1273 buffer_free(&m); 1274 } 1275 1276 void 1277 mm_jpake_step1(struct modp_group *grp, 1278 u_char **id, u_int *id_len, 1279 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, 1280 u_char **priv1_proof, u_int *priv1_proof_len, 1281 u_char **priv2_proof, u_int *priv2_proof_len) 1282 { 1283 Buffer m; 1284 1285 debug3("%s entering", __func__); 1286 1287 buffer_init(&m); 1288 mm_request_send(pmonitor->m_recvfd, 1289 MONITOR_REQ_JPAKE_STEP1, &m); 1290 1291 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); 1292 mm_request_receive_expect(pmonitor->m_recvfd, 1293 MONITOR_ANS_JPAKE_STEP1, &m); 1294 1295 if ((*priv1 = BN_new()) == NULL || 1296 (*priv2 = BN_new()) == NULL || 1297 (*g_priv1 = BN_new()) == NULL || 1298 (*g_priv2 = BN_new()) == NULL) 1299 fatal("%s: BN_new", __func__); 1300 1301 *id = buffer_get_string(&m, id_len); 1302 /* priv1 and priv2 are, well, private */ 1303 buffer_get_bignum2(&m, *g_priv1); 1304 buffer_get_bignum2(&m, *g_priv2); 1305 *priv1_proof = buffer_get_string(&m, priv1_proof_len); 1306 *priv2_proof = buffer_get_string(&m, priv2_proof_len); 1307 1308 buffer_free(&m); 1309 } 1310 1311 void 1312 mm_jpake_step2(struct modp_group *grp, BIGNUM *s, 1313 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, 1314 const u_char *theirid, u_int theirid_len, 1315 const u_char *myid, u_int myid_len, 1316 const u_char *theirpub1_proof, u_int theirpub1_proof_len, 1317 const u_char *theirpub2_proof, u_int theirpub2_proof_len, 1318 BIGNUM **newpub, 1319 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) 1320 { 1321 Buffer m; 1322 1323 debug3("%s entering", __func__); 1324 1325 buffer_init(&m); 1326 /* monitor already has all bignums except theirpub1, theirpub2 */ 1327 buffer_put_bignum2(&m, theirpub1); 1328 buffer_put_bignum2(&m, theirpub2); 1329 /* monitor already knows our id */ 1330 buffer_put_string(&m, theirid, theirid_len); 1331 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); 1332 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); 1333 1334 mm_request_send(pmonitor->m_recvfd, 1335 MONITOR_REQ_JPAKE_STEP2, &m); 1336 1337 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); 1338 mm_request_receive_expect(pmonitor->m_recvfd, 1339 MONITOR_ANS_JPAKE_STEP2, &m); 1340 1341 if ((*newpub = BN_new()) == NULL) 1342 fatal("%s: BN_new", __func__); 1343 1344 buffer_get_bignum2(&m, *newpub); 1345 *newpub_exponent_proof = buffer_get_string(&m, 1346 newpub_exponent_proof_len); 1347 1348 buffer_free(&m); 1349 } 1350 1351 void 1352 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val, 1353 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, 1354 BIGNUM *theirpub1, BIGNUM *theirpub2, 1355 const u_char *my_id, u_int my_id_len, 1356 const u_char *their_id, u_int their_id_len, 1357 const u_char *sess_id, u_int sess_id_len, 1358 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, 1359 BIGNUM **k, 1360 u_char **confirm_hash, u_int *confirm_hash_len) 1361 { 1362 Buffer m; 1363 1364 debug3("%s entering", __func__); 1365 1366 buffer_init(&m); 1367 /* monitor already has all bignums except step2_val */ 1368 buffer_put_bignum2(&m, step2_val); 1369 /* monitor already knows all the ids */ 1370 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); 1371 1372 mm_request_send(pmonitor->m_recvfd, 1373 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); 1374 1375 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); 1376 mm_request_receive_expect(pmonitor->m_recvfd, 1377 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); 1378 1379 /* 'k' is sensitive and stays in the monitor */ 1380 *confirm_hash = buffer_get_string(&m, confirm_hash_len); 1381 1382 buffer_free(&m); 1383 } 1384 1385 int 1386 mm_jpake_check_confirm(const BIGNUM *k, 1387 const u_char *peer_id, u_int peer_id_len, 1388 const u_char *sess_id, u_int sess_id_len, 1389 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) 1390 { 1391 Buffer m; 1392 int success = 0; 1393 1394 debug3("%s entering", __func__); 1395 1396 buffer_init(&m); 1397 /* k is dummy in slave, ignored */ 1398 /* monitor knows all the ids */ 1399 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); 1400 mm_request_send(pmonitor->m_recvfd, 1401 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); 1402 1403 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); 1404 mm_request_receive_expect(pmonitor->m_recvfd, 1405 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); 1406 1407 success = buffer_get_int(&m); 1408 buffer_free(&m); 1409 1410 debug3("%s: success = %d", __func__, success); 1411 return success; 1412 } 1413 #endif /* JPAKE */ 1414