1 /* $OpenBSD: monitor_wrap.c,v 1.73 2011/06/17 21:44:31 djm Exp $ */ 2 /* 3 * Copyright 2002 Niels Provos <provos (at) citi.umich.edu> 4 * Copyright 2002 Markus Friedl <markus (at) 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 #ifdef HAVE_PW_GECOS_IN_PASSWD 263 pw->pw_gecos = buffer_get_string(&m, NULL); 264 #endif 265 #ifdef HAVE_PW_CLASS_IN_PASSWD 266 pw->pw_class = buffer_get_string(&m, NULL); 267 #endif 268 pw->pw_dir = buffer_get_string(&m, NULL); 269 pw->pw_shell = buffer_get_string(&m, NULL); 270 271 out: 272 /* copy options block as a Match directive may have changed some */ 273 newopts = buffer_get_string(&m, &len); 274 if (len != sizeof(*newopts)) 275 fatal("%s: option block size mismatch", __func__); 276 277 #define M_CP_STROPT(x) do { \ 278 if (newopts->x != NULL) \ 279 newopts->x = buffer_get_string(&m, NULL); \ 280 } while (0) 281 #define M_CP_STRARRAYOPT(x, nx) do { \ 282 for (i = 0; i < newopts->nx; i++) \ 283 newopts->x[i] = buffer_get_string(&m, NULL); \ 284 } while (0) 285 /* See comment in servconf.h */ 286 COPY_MATCH_STRING_OPTS(); 287 #undef M_CP_STROPT 288 #undef M_CP_STRARRAYOPT 289 290 copy_set_server_options(&options, newopts, 1); 291 xfree(newopts); 292 293 buffer_free(&m); 294 295 return (pw); 296 } 297 298 char * 299 mm_auth2_read_banner(void) 300 { 301 Buffer m; 302 char *banner; 303 304 debug3("%s entering", __func__); 305 306 buffer_init(&m); 307 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 308 buffer_clear(&m); 309 310 mm_request_receive_expect(pmonitor->m_recvfd, 311 MONITOR_ANS_AUTH2_READ_BANNER, &m); 312 banner = buffer_get_string(&m, NULL); 313 buffer_free(&m); 314 315 /* treat empty banner as missing banner */ 316 if (strlen(banner) == 0) { 317 xfree(banner); 318 banner = NULL; 319 } 320 return (banner); 321 } 322 323 /* Inform the privileged process about service and style */ 324 325 void 326 mm_inform_authserv(char *service, char *style) 327 { 328 Buffer m; 329 330 debug3("%s entering", __func__); 331 332 buffer_init(&m); 333 buffer_put_cstring(&m, service); 334 buffer_put_cstring(&m, style ? style : ""); 335 336 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 337 338 buffer_free(&m); 339 } 340 341 /* Do the password authentication */ 342 int 343 mm_auth_password(Authctxt *authctxt, char *password) 344 { 345 Buffer m; 346 int authenticated = 0; 347 348 debug3("%s entering", __func__); 349 350 buffer_init(&m); 351 buffer_put_cstring(&m, password); 352 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 353 354 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 355 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 356 357 authenticated = buffer_get_int(&m); 358 359 buffer_free(&m); 360 361 debug3("%s: user %sauthenticated", 362 __func__, authenticated ? "" : "not "); 363 return (authenticated); 364 } 365 366 int 367 mm_user_key_allowed(struct passwd *pw, Key *key) 368 { 369 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); 370 } 371 372 int 373 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, 374 Key *key) 375 { 376 return (mm_key_allowed(MM_HOSTKEY, user, host, key)); 377 } 378 379 int 380 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, 381 char *host, Key *key) 382 { 383 int ret; 384 385 key->type = KEY_RSA; /* XXX hack for key_to_blob */ 386 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); 387 key->type = KEY_RSA1; 388 return (ret); 389 } 390 391 int 392 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) 393 { 394 Buffer m; 395 u_char *blob; 396 u_int len; 397 int allowed = 0, have_forced = 0; 398 399 debug3("%s entering", __func__); 400 401 /* Convert the key to a blob and the pass it over */ 402 if (!key_to_blob(key, &blob, &len)) 403 return (0); 404 405 buffer_init(&m); 406 buffer_put_int(&m, type); 407 buffer_put_cstring(&m, user ? user : ""); 408 buffer_put_cstring(&m, host ? host : ""); 409 buffer_put_string(&m, blob, len); 410 xfree(blob); 411 412 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 413 414 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 415 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 416 417 allowed = buffer_get_int(&m); 418 419 /* fake forced command */ 420 auth_clear_options(); 421 have_forced = buffer_get_int(&m); 422 forced_command = have_forced ? xstrdup("true") : NULL; 423 424 buffer_free(&m); 425 426 return (allowed); 427 } 428 429 /* 430 * This key verify needs to send the key type along, because the 431 * privileged parent makes the decision if the key is allowed 432 * for authentication. 433 */ 434 435 int 436 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) 437 { 438 Buffer m; 439 u_char *blob; 440 u_int len; 441 int verified = 0; 442 443 debug3("%s entering", __func__); 444 445 /* Convert the key to a blob and the pass it over */ 446 if (!key_to_blob(key, &blob, &len)) 447 return (0); 448 449 buffer_init(&m); 450 buffer_put_string(&m, blob, len); 451 buffer_put_string(&m, sig, siglen); 452 buffer_put_string(&m, data, datalen); 453 xfree(blob); 454 455 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 456 457 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 458 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 459 460 verified = buffer_get_int(&m); 461 462 buffer_free(&m); 463 464 return (verified); 465 } 466 467 /* Export key state after authentication */ 468 Newkeys * 469 mm_newkeys_from_blob(u_char *blob, int blen) 470 { 471 Buffer b; 472 u_int len; 473 Newkeys *newkey = NULL; 474 Enc *enc; 475 Mac *mac; 476 Comp *comp; 477 478 debug3("%s: %p(%d)", __func__, blob, blen); 479 #ifdef DEBUG_PK 480 dump_base64(stderr, blob, blen); 481 #endif 482 buffer_init(&b); 483 buffer_append(&b, blob, blen); 484 485 newkey = xmalloc(sizeof(*newkey)); 486 enc = &newkey->enc; 487 mac = &newkey->mac; 488 comp = &newkey->comp; 489 490 /* Enc structure */ 491 enc->name = buffer_get_string(&b, NULL); 492 buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); 493 enc->enabled = buffer_get_int(&b); 494 enc->block_size = buffer_get_int(&b); 495 enc->key = buffer_get_string(&b, &enc->key_len); 496 enc->iv = buffer_get_string(&b, &len); 497 if (len != enc->block_size) 498 fatal("%s: bad ivlen: expected %u != %u", __func__, 499 enc->block_size, len); 500 501 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) 502 fatal("%s: bad cipher name %s or pointer %p", __func__, 503 enc->name, enc->cipher); 504 505 /* Mac structure */ 506 mac->name = buffer_get_string(&b, NULL); 507 if (mac->name == NULL || mac_setup(mac, mac->name) == -1) 508 fatal("%s: can not setup mac %s", __func__, mac->name); 509 mac->enabled = buffer_get_int(&b); 510 mac->key = buffer_get_string(&b, &len); 511 if (len > mac->key_len) 512 fatal("%s: bad mac key length: %u > %d", __func__, len, 513 mac->key_len); 514 mac->key_len = len; 515 516 /* Comp structure */ 517 comp->type = buffer_get_int(&b); 518 comp->enabled = buffer_get_int(&b); 519 comp->name = buffer_get_string(&b, NULL); 520 521 len = buffer_len(&b); 522 if (len != 0) 523 error("newkeys_from_blob: remaining bytes in blob %u", len); 524 buffer_free(&b); 525 return (newkey); 526 } 527 528 int 529 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) 530 { 531 Buffer b; 532 int len; 533 Enc *enc; 534 Mac *mac; 535 Comp *comp; 536 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode); 537 538 debug3("%s: converting %p", __func__, newkey); 539 540 if (newkey == NULL) { 541 error("%s: newkey == NULL", __func__); 542 return 0; 543 } 544 enc = &newkey->enc; 545 mac = &newkey->mac; 546 comp = &newkey->comp; 547 548 buffer_init(&b); 549 /* Enc structure */ 550 buffer_put_cstring(&b, enc->name); 551 /* The cipher struct is constant and shared, you export pointer */ 552 buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); 553 buffer_put_int(&b, enc->enabled); 554 buffer_put_int(&b, enc->block_size); 555 buffer_put_string(&b, enc->key, enc->key_len); 556 packet_get_keyiv(mode, enc->iv, enc->block_size); 557 buffer_put_string(&b, enc->iv, enc->block_size); 558 559 /* Mac structure */ 560 buffer_put_cstring(&b, mac->name); 561 buffer_put_int(&b, mac->enabled); 562 buffer_put_string(&b, mac->key, mac->key_len); 563 564 /* Comp structure */ 565 buffer_put_int(&b, comp->type); 566 buffer_put_int(&b, comp->enabled); 567 buffer_put_cstring(&b, comp->name); 568 569 len = buffer_len(&b); 570 if (lenp != NULL) 571 *lenp = len; 572 if (blobp != NULL) { 573 *blobp = xmalloc(len); 574 memcpy(*blobp, buffer_ptr(&b), len); 575 } 576 memset(buffer_ptr(&b), 0, len); 577 buffer_free(&b); 578 return len; 579 } 580 581 static void 582 mm_send_kex(Buffer *m, Kex *kex) 583 { 584 buffer_put_string(m, kex->session_id, kex->session_id_len); 585 buffer_put_int(m, kex->we_need); 586 buffer_put_int(m, kex->hostkey_type); 587 buffer_put_int(m, kex->kex_type); 588 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); 589 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); 590 buffer_put_int(m, kex->flags); 591 buffer_put_cstring(m, kex->client_version_string); 592 buffer_put_cstring(m, kex->server_version_string); 593 } 594 595 void 596 mm_send_keystate(struct monitor *monitor) 597 { 598 Buffer m, *input, *output; 599 u_char *blob, *p; 600 u_int bloblen, plen; 601 u_int32_t seqnr, packets; 602 u_int64_t blocks, bytes; 603 604 buffer_init(&m); 605 606 if (!compat20) { 607 u_char iv[24]; 608 u_char *key; 609 u_int ivlen, keylen; 610 611 buffer_put_int(&m, packet_get_protocol_flags()); 612 613 buffer_put_int(&m, packet_get_ssh1_cipher()); 614 615 debug3("%s: Sending ssh1 KEY+IV", __func__); 616 keylen = packet_get_encryption_key(NULL); 617 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ 618 keylen = packet_get_encryption_key(key); 619 buffer_put_string(&m, key, keylen); 620 memset(key, 0, keylen); 621 xfree(key); 622 623 ivlen = packet_get_keyiv_len(MODE_OUT); 624 packet_get_keyiv(MODE_OUT, iv, ivlen); 625 buffer_put_string(&m, iv, ivlen); 626 ivlen = packet_get_keyiv_len(MODE_OUT); 627 packet_get_keyiv(MODE_IN, iv, ivlen); 628 buffer_put_string(&m, iv, ivlen); 629 goto skip; 630 } else { 631 /* Kex for rekeying */ 632 mm_send_kex(&m, *monitor->m_pkex); 633 } 634 635 debug3("%s: Sending new keys: %p %p", 636 __func__, packet_get_newkeys(MODE_OUT), 637 packet_get_newkeys(MODE_IN)); 638 639 /* Keys from Kex */ 640 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) 641 fatal("%s: conversion of newkeys failed", __func__); 642 643 buffer_put_string(&m, blob, bloblen); 644 xfree(blob); 645 646 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) 647 fatal("%s: conversion of newkeys failed", __func__); 648 649 buffer_put_string(&m, blob, bloblen); 650 xfree(blob); 651 652 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); 653 buffer_put_int(&m, seqnr); 654 buffer_put_int64(&m, blocks); 655 buffer_put_int(&m, packets); 656 buffer_put_int64(&m, bytes); 657 packet_get_state(MODE_IN, &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); 662 663 debug3("%s: New keys have been sent", __func__); 664 skip: 665 /* More key context */ 666 plen = packet_get_keycontext(MODE_OUT, NULL); 667 p = xmalloc(plen+1); 668 packet_get_keycontext(MODE_OUT, p); 669 buffer_put_string(&m, p, plen); 670 xfree(p); 671 672 plen = packet_get_keycontext(MODE_IN, NULL); 673 p = xmalloc(plen+1); 674 packet_get_keycontext(MODE_IN, p); 675 buffer_put_string(&m, p, plen); 676 xfree(p); 677 678 /* Compression state */ 679 debug3("%s: Sending compression state", __func__); 680 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); 681 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); 682 683 /* Network I/O buffers */ 684 input = (Buffer *)packet_get_input(); 685 output = (Buffer *)packet_get_output(); 686 buffer_put_string(&m, buffer_ptr(input), buffer_len(input)); 687 buffer_put_string(&m, buffer_ptr(output), buffer_len(output)); 688 689 /* Roaming */ 690 if (compat20) { 691 buffer_put_int64(&m, get_sent_bytes()); 692 buffer_put_int64(&m, get_recv_bytes()); 693 } 694 695 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); 696 debug3("%s: Finished sending state", __func__); 697 698 buffer_free(&m); 699 } 700 701 int 702 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 703 { 704 Buffer m; 705 char *p, *msg; 706 int success = 0, tmp1 = -1, tmp2 = -1; 707 708 /* Kludge: ensure there are fds free to receive the pty/tty */ 709 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 710 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 711 error("%s: cannot allocate fds for pty", __func__); 712 if (tmp1 > 0) 713 close(tmp1); 714 if (tmp2 > 0) 715 close(tmp2); 716 return 0; 717 } 718 close(tmp1); 719 close(tmp2); 720 721 buffer_init(&m); 722 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 723 724 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 725 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 726 727 success = buffer_get_int(&m); 728 if (success == 0) { 729 debug3("%s: pty alloc failed", __func__); 730 buffer_free(&m); 731 return (0); 732 } 733 p = buffer_get_string(&m, NULL); 734 msg = buffer_get_string(&m, NULL); 735 buffer_free(&m); 736 737 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 738 xfree(p); 739 740 buffer_append(&loginmsg, msg, strlen(msg)); 741 xfree(msg); 742 743 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 744 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 745 fatal("%s: receive fds failed", __func__); 746 747 /* Success */ 748 return (1); 749 } 750 751 void 752 mm_session_pty_cleanup2(Session *s) 753 { 754 Buffer m; 755 756 if (s->ttyfd == -1) 757 return; 758 buffer_init(&m); 759 buffer_put_cstring(&m, s->tty); 760 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 761 buffer_free(&m); 762 763 /* closed dup'ed master */ 764 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 765 error("close(s->ptymaster/%d): %s", 766 s->ptymaster, strerror(errno)); 767 768 /* unlink pty from session */ 769 s->ttyfd = -1; 770 } 771 772 #ifdef USE_PAM 773 void 774 mm_start_pam(Authctxt *authctxt) 775 { 776 Buffer m; 777 778 debug3("%s entering", __func__); 779 if (!options.use_pam) 780 fatal("UsePAM=no, but ended up in %s anyway", __func__); 781 782 buffer_init(&m); 783 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); 784 785 buffer_free(&m); 786 } 787 788 u_int 789 mm_do_pam_account(void) 790 { 791 Buffer m; 792 u_int ret; 793 char *msg; 794 795 debug3("%s entering", __func__); 796 if (!options.use_pam) 797 fatal("UsePAM=no, but ended up in %s anyway", __func__); 798 799 buffer_init(&m); 800 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); 801 802 mm_request_receive_expect(pmonitor->m_recvfd, 803 MONITOR_ANS_PAM_ACCOUNT, &m); 804 ret = buffer_get_int(&m); 805 msg = buffer_get_string(&m, NULL); 806 buffer_append(&loginmsg, msg, strlen(msg)); 807 xfree(msg); 808 809 buffer_free(&m); 810 811 debug3("%s returning %d", __func__, ret); 812 813 return (ret); 814 } 815 816 void * 817 mm_sshpam_init_ctx(Authctxt *authctxt) 818 { 819 Buffer m; 820 int success; 821 822 debug3("%s", __func__); 823 buffer_init(&m); 824 buffer_put_cstring(&m, authctxt->user); 825 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); 826 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); 827 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); 828 success = buffer_get_int(&m); 829 if (success == 0) { 830 debug3("%s: pam_init_ctx failed", __func__); 831 buffer_free(&m); 832 return (NULL); 833 } 834 buffer_free(&m); 835 return (authctxt); 836 } 837 838 int 839 mm_sshpam_query(void *ctx, char **name, char **info, 840 u_int *num, char ***prompts, u_int **echo_on) 841 { 842 Buffer m; 843 u_int i; 844 int ret; 845 846 debug3("%s", __func__); 847 buffer_init(&m); 848 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); 849 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); 850 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); 851 ret = buffer_get_int(&m); 852 debug3("%s: pam_query returned %d", __func__, ret); 853 *name = buffer_get_string(&m, NULL); 854 *info = buffer_get_string(&m, NULL); 855 *num = buffer_get_int(&m); 856 if (*num > PAM_MAX_NUM_MSG) 857 fatal("%s: recieved %u PAM messages, expected <= %u", 858 __func__, *num, PAM_MAX_NUM_MSG); 859 *prompts = xcalloc((*num + 1), sizeof(char *)); 860 *echo_on = xcalloc((*num + 1), sizeof(u_int)); 861 for (i = 0; i < *num; ++i) { 862 (*prompts)[i] = buffer_get_string(&m, NULL); 863 (*echo_on)[i] = buffer_get_int(&m); 864 } 865 buffer_free(&m); 866 return (ret); 867 } 868 869 int 870 mm_sshpam_respond(void *ctx, u_int num, char **resp) 871 { 872 Buffer m; 873 u_int i; 874 int ret; 875 876 debug3("%s", __func__); 877 buffer_init(&m); 878 buffer_put_int(&m, num); 879 for (i = 0; i < num; ++i) 880 buffer_put_cstring(&m, resp[i]); 881 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); 882 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); 883 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); 884 ret = buffer_get_int(&m); 885 debug3("%s: pam_respond returned %d", __func__, ret); 886 buffer_free(&m); 887 return (ret); 888 } 889 890 void 891 mm_sshpam_free_ctx(void *ctxtp) 892 { 893 Buffer m; 894 895 debug3("%s", __func__); 896 buffer_init(&m); 897 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); 898 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); 899 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); 900 buffer_free(&m); 901 } 902 #endif /* USE_PAM */ 903 904 /* Request process termination */ 905 906 void 907 mm_terminate(void) 908 { 909 Buffer m; 910 911 buffer_init(&m); 912 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 913 buffer_free(&m); 914 } 915 916 int 917 mm_ssh1_session_key(BIGNUM *num) 918 { 919 int rsafail; 920 Buffer m; 921 922 buffer_init(&m); 923 buffer_put_bignum2(&m, num); 924 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); 925 926 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); 927 928 rsafail = buffer_get_int(&m); 929 buffer_get_bignum2(&m, num); 930 931 buffer_free(&m); 932 933 return (rsafail); 934 } 935 936 static void 937 mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 938 char ***prompts, u_int **echo_on) 939 { 940 *name = xstrdup(""); 941 *infotxt = xstrdup(""); 942 *numprompts = 1; 943 *prompts = xcalloc(*numprompts, sizeof(char *)); 944 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 945 (*echo_on)[0] = 0; 946 } 947 948 int 949 mm_bsdauth_query(void *ctx, char **name, char **infotxt, 950 u_int *numprompts, char ***prompts, u_int **echo_on) 951 { 952 Buffer m; 953 u_int success; 954 char *challenge; 955 956 debug3("%s: entering", __func__); 957 958 buffer_init(&m); 959 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 960 961 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 962 &m); 963 success = buffer_get_int(&m); 964 if (success == 0) { 965 debug3("%s: no challenge", __func__); 966 buffer_free(&m); 967 return (-1); 968 } 969 970 /* Get the challenge, and format the response */ 971 challenge = buffer_get_string(&m, NULL); 972 buffer_free(&m); 973 974 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 975 (*prompts)[0] = challenge; 976 977 debug3("%s: received challenge: %s", __func__, challenge); 978 979 return (0); 980 } 981 982 int 983 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 984 { 985 Buffer m; 986 int authok; 987 988 debug3("%s: entering", __func__); 989 if (numresponses != 1) 990 return (-1); 991 992 buffer_init(&m); 993 buffer_put_cstring(&m, responses[0]); 994 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 995 996 mm_request_receive_expect(pmonitor->m_recvfd, 997 MONITOR_ANS_BSDAUTHRESPOND, &m); 998 999 authok = buffer_get_int(&m); 1000 buffer_free(&m); 1001 1002 return ((authok == 0) ? -1 : 0); 1003 } 1004 1005 #ifdef SKEY 1006 int 1007 mm_skey_query(void *ctx, char **name, char **infotxt, 1008 u_int *numprompts, char ***prompts, u_int **echo_on) 1009 { 1010 Buffer m; 1011 u_int success; 1012 char *challenge; 1013 1014 debug3("%s: entering", __func__); 1015 1016 buffer_init(&m); 1017 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); 1018 1019 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, 1020 &m); 1021 success = buffer_get_int(&m); 1022 if (success == 0) { 1023 debug3("%s: no challenge", __func__); 1024 buffer_free(&m); 1025 return (-1); 1026 } 1027 1028 /* Get the challenge, and format the response */ 1029 challenge = buffer_get_string(&m, NULL); 1030 buffer_free(&m); 1031 1032 debug3("%s: received challenge: %s", __func__, challenge); 1033 1034 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 1035 1036 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); 1037 xfree(challenge); 1038 1039 return (0); 1040 } 1041 1042 int 1043 mm_skey_respond(void *ctx, u_int numresponses, char **responses) 1044 { 1045 Buffer m; 1046 int authok; 1047 1048 debug3("%s: entering", __func__); 1049 if (numresponses != 1) 1050 return (-1); 1051 1052 buffer_init(&m); 1053 buffer_put_cstring(&m, responses[0]); 1054 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); 1055 1056 mm_request_receive_expect(pmonitor->m_recvfd, 1057 MONITOR_ANS_SKEYRESPOND, &m); 1058 1059 authok = buffer_get_int(&m); 1060 buffer_free(&m); 1061 1062 return ((authok == 0) ? -1 : 0); 1063 } 1064 #endif /* SKEY */ 1065 1066 void 1067 mm_ssh1_session_id(u_char session_id[16]) 1068 { 1069 Buffer m; 1070 int i; 1071 1072 debug3("%s entering", __func__); 1073 1074 buffer_init(&m); 1075 for (i = 0; i < 16; i++) 1076 buffer_put_char(&m, session_id[i]); 1077 1078 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); 1079 buffer_free(&m); 1080 } 1081 1082 int 1083 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) 1084 { 1085 Buffer m; 1086 Key *key; 1087 u_char *blob; 1088 u_int blen; 1089 int allowed = 0, have_forced = 0; 1090 1091 debug3("%s entering", __func__); 1092 1093 buffer_init(&m); 1094 buffer_put_bignum2(&m, client_n); 1095 1096 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); 1097 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); 1098 1099 allowed = buffer_get_int(&m); 1100 1101 /* fake forced command */ 1102 auth_clear_options(); 1103 have_forced = buffer_get_int(&m); 1104 forced_command = have_forced ? xstrdup("true") : NULL; 1105 1106 if (allowed && rkey != NULL) { 1107 blob = buffer_get_string(&m, &blen); 1108 if ((key = key_from_blob(blob, blen)) == NULL) 1109 fatal("%s: key_from_blob failed", __func__); 1110 *rkey = key; 1111 xfree(blob); 1112 } 1113 buffer_free(&m); 1114 1115 return (allowed); 1116 } 1117 1118 BIGNUM * 1119 mm_auth_rsa_generate_challenge(Key *key) 1120 { 1121 Buffer m; 1122 BIGNUM *challenge; 1123 u_char *blob; 1124 u_int blen; 1125 1126 debug3("%s entering", __func__); 1127 1128 if ((challenge = BN_new()) == NULL) 1129 fatal("%s: BN_new failed", __func__); 1130 1131 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1132 if (key_to_blob(key, &blob, &blen) == 0) 1133 fatal("%s: key_to_blob failed", __func__); 1134 key->type = KEY_RSA1; 1135 1136 buffer_init(&m); 1137 buffer_put_string(&m, blob, blen); 1138 xfree(blob); 1139 1140 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); 1141 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); 1142 1143 buffer_get_bignum2(&m, challenge); 1144 buffer_free(&m); 1145 1146 return (challenge); 1147 } 1148 1149 int 1150 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) 1151 { 1152 Buffer m; 1153 u_char *blob; 1154 u_int blen; 1155 int success = 0; 1156 1157 debug3("%s entering", __func__); 1158 1159 key->type = KEY_RSA; /* XXX cheat for key_to_blob */ 1160 if (key_to_blob(key, &blob, &blen) == 0) 1161 fatal("%s: key_to_blob failed", __func__); 1162 key->type = KEY_RSA1; 1163 1164 buffer_init(&m); 1165 buffer_put_string(&m, blob, blen); 1166 buffer_put_string(&m, response, 16); 1167 xfree(blob); 1168 1169 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); 1170 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); 1171 1172 success = buffer_get_int(&m); 1173 buffer_free(&m); 1174 1175 return (success); 1176 } 1177 1178 #ifdef SSH_AUDIT_EVENTS 1179 void 1180 mm_audit_event(ssh_audit_event_t event) 1181 { 1182 Buffer m; 1183 1184 debug3("%s entering", __func__); 1185 1186 buffer_init(&m); 1187 buffer_put_int(&m, event); 1188 1189 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); 1190 buffer_free(&m); 1191 } 1192 1193 void 1194 mm_audit_run_command(const char *command) 1195 { 1196 Buffer m; 1197 1198 debug3("%s entering command %s", __func__, command); 1199 1200 buffer_init(&m); 1201 buffer_put_cstring(&m, command); 1202 1203 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); 1204 buffer_free(&m); 1205 } 1206 #endif /* SSH_AUDIT_EVENTS */ 1207 1208 #ifdef GSSAPI 1209 OM_uint32 1210 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 1211 { 1212 Buffer m; 1213 OM_uint32 major; 1214 1215 /* Client doesn't get to see the context */ 1216 *ctx = NULL; 1217 1218 buffer_init(&m); 1219 buffer_put_string(&m, goid->elements, goid->length); 1220 1221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 1222 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 1223 1224 major = buffer_get_int(&m); 1225 1226 buffer_free(&m); 1227 return (major); 1228 } 1229 1230 OM_uint32 1231 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 1232 gss_buffer_desc *out, OM_uint32 *flags) 1233 { 1234 Buffer m; 1235 OM_uint32 major; 1236 u_int len; 1237 1238 buffer_init(&m); 1239 buffer_put_string(&m, in->value, in->length); 1240 1241 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 1242 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 1243 1244 major = buffer_get_int(&m); 1245 out->value = buffer_get_string(&m, &len); 1246 out->length = len; 1247 if (flags) 1248 *flags = buffer_get_int(&m); 1249 1250 buffer_free(&m); 1251 1252 return (major); 1253 } 1254 1255 OM_uint32 1256 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 1257 { 1258 Buffer m; 1259 OM_uint32 major; 1260 1261 buffer_init(&m); 1262 buffer_put_string(&m, gssbuf->value, gssbuf->length); 1263 buffer_put_string(&m, gssmic->value, gssmic->length); 1264 1265 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 1266 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 1267 &m); 1268 1269 major = buffer_get_int(&m); 1270 buffer_free(&m); 1271 return(major); 1272 } 1273 1274 int 1275 mm_ssh_gssapi_userok(char *user) 1276 { 1277 Buffer m; 1278 int authenticated = 0; 1279 1280 buffer_init(&m); 1281 1282 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 1283 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 1284 &m); 1285 1286 authenticated = buffer_get_int(&m); 1287 1288 buffer_free(&m); 1289 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 1290 return (authenticated); 1291 } 1292 #endif /* GSSAPI */ 1293 1294 #ifdef JPAKE 1295 void 1296 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, 1297 char **hash_scheme, char **salt) 1298 { 1299 Buffer m; 1300 1301 debug3("%s entering", __func__); 1302 1303 buffer_init(&m); 1304 mm_request_send(pmonitor->m_recvfd, 1305 MONITOR_REQ_JPAKE_GET_PWDATA, &m); 1306 1307 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); 1308 mm_request_receive_expect(pmonitor->m_recvfd, 1309 MONITOR_ANS_JPAKE_GET_PWDATA, &m); 1310 1311 *hash_scheme = buffer_get_string(&m, NULL); 1312 *salt = buffer_get_string(&m, NULL); 1313 1314 buffer_free(&m); 1315 } 1316 1317 void 1318 mm_jpake_step1(struct modp_group *grp, 1319 u_char **id, u_int *id_len, 1320 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, 1321 u_char **priv1_proof, u_int *priv1_proof_len, 1322 u_char **priv2_proof, u_int *priv2_proof_len) 1323 { 1324 Buffer m; 1325 1326 debug3("%s entering", __func__); 1327 1328 buffer_init(&m); 1329 mm_request_send(pmonitor->m_recvfd, 1330 MONITOR_REQ_JPAKE_STEP1, &m); 1331 1332 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); 1333 mm_request_receive_expect(pmonitor->m_recvfd, 1334 MONITOR_ANS_JPAKE_STEP1, &m); 1335 1336 if ((*priv1 = BN_new()) == NULL || 1337 (*priv2 = BN_new()) == NULL || 1338 (*g_priv1 = BN_new()) == NULL || 1339 (*g_priv2 = BN_new()) == NULL) 1340 fatal("%s: BN_new", __func__); 1341 1342 *id = buffer_get_string(&m, id_len); 1343 /* priv1 and priv2 are, well, private */ 1344 buffer_get_bignum2(&m, *g_priv1); 1345 buffer_get_bignum2(&m, *g_priv2); 1346 *priv1_proof = buffer_get_string(&m, priv1_proof_len); 1347 *priv2_proof = buffer_get_string(&m, priv2_proof_len); 1348 1349 buffer_free(&m); 1350 } 1351 1352 void 1353 mm_jpake_step2(struct modp_group *grp, BIGNUM *s, 1354 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, 1355 const u_char *theirid, u_int theirid_len, 1356 const u_char *myid, u_int myid_len, 1357 const u_char *theirpub1_proof, u_int theirpub1_proof_len, 1358 const u_char *theirpub2_proof, u_int theirpub2_proof_len, 1359 BIGNUM **newpub, 1360 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) 1361 { 1362 Buffer m; 1363 1364 debug3("%s entering", __func__); 1365 1366 buffer_init(&m); 1367 /* monitor already has all bignums except theirpub1, theirpub2 */ 1368 buffer_put_bignum2(&m, theirpub1); 1369 buffer_put_bignum2(&m, theirpub2); 1370 /* monitor already knows our id */ 1371 buffer_put_string(&m, theirid, theirid_len); 1372 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); 1373 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); 1374 1375 mm_request_send(pmonitor->m_recvfd, 1376 MONITOR_REQ_JPAKE_STEP2, &m); 1377 1378 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); 1379 mm_request_receive_expect(pmonitor->m_recvfd, 1380 MONITOR_ANS_JPAKE_STEP2, &m); 1381 1382 if ((*newpub = BN_new()) == NULL) 1383 fatal("%s: BN_new", __func__); 1384 1385 buffer_get_bignum2(&m, *newpub); 1386 *newpub_exponent_proof = buffer_get_string(&m, 1387 newpub_exponent_proof_len); 1388 1389 buffer_free(&m); 1390 } 1391 1392 void 1393 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val, 1394 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, 1395 BIGNUM *theirpub1, BIGNUM *theirpub2, 1396 const u_char *my_id, u_int my_id_len, 1397 const u_char *their_id, u_int their_id_len, 1398 const u_char *sess_id, u_int sess_id_len, 1399 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, 1400 BIGNUM **k, 1401 u_char **confirm_hash, u_int *confirm_hash_len) 1402 { 1403 Buffer m; 1404 1405 debug3("%s entering", __func__); 1406 1407 buffer_init(&m); 1408 /* monitor already has all bignums except step2_val */ 1409 buffer_put_bignum2(&m, step2_val); 1410 /* monitor already knows all the ids */ 1411 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); 1412 1413 mm_request_send(pmonitor->m_recvfd, 1414 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); 1415 1416 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); 1417 mm_request_receive_expect(pmonitor->m_recvfd, 1418 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); 1419 1420 /* 'k' is sensitive and stays in the monitor */ 1421 *confirm_hash = buffer_get_string(&m, confirm_hash_len); 1422 1423 buffer_free(&m); 1424 } 1425 1426 int 1427 mm_jpake_check_confirm(const BIGNUM *k, 1428 const u_char *peer_id, u_int peer_id_len, 1429 const u_char *sess_id, u_int sess_id_len, 1430 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) 1431 { 1432 Buffer m; 1433 int success = 0; 1434 1435 debug3("%s entering", __func__); 1436 1437 buffer_init(&m); 1438 /* k is dummy in slave, ignored */ 1439 /* monitor knows all the ids */ 1440 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); 1441 mm_request_send(pmonitor->m_recvfd, 1442 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); 1443 1444 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); 1445 mm_request_receive_expect(pmonitor->m_recvfd, 1446 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); 1447 1448 success = buffer_get_int(&m); 1449 buffer_free(&m); 1450 1451 debug3("%s: success = %d", __func__, success); 1452 return success; 1453 } 1454 #endif /* JPAKE */ 1455
