1 /* $NetBSD: monitor_wrap.c,v 1.4 2010/11/21 18:29:49 adam Exp $ */ 2 /* $OpenBSD: monitor_wrap.c,v 1.69 2010/03/07 11:57:13 dtucker Exp $ */ 3 /* 4 * Copyright 2002 Niels Provos <provos@citi.umich.edu> 5 * Copyright 2002 Markus Friedl <markus@openbsd.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "includes.h" 30 __RCSID("$NetBSD: monitor_wrap.c,v 1.4 2010/11/21 18:29:49 adam Exp $"); 31 #include <sys/types.h> 32 #include <sys/uio.h> 33 #include <sys/queue.h> 34 35 #include <errno.h> 36 #include <pwd.h> 37 #include <signal.h> 38 #include <stdio.h> 39 #include <string.h> 40 #include <unistd.h> 41 42 #include <openssl/bn.h> 43 #include <openssl/dh.h> 44 #include <openssl/evp.h> 45 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 #include <zlib.h> 60 #include "monitor.h" 61 #ifdef GSSAPI 62 #include "ssh-gss.h" 63 #endif 64 #include "monitor_wrap.h" 65 #include "atomicio.h" 66 #include "monitor_fdpass.h" 67 #ifdef USE_PAM 68 #include "servconf.h" 69 #include <security/pam_appl.h> 70 #endif 71 #include "misc.h" 72 #include "schnorr.h" 73 #include "jpake.h" 74 75 #include "channels.h" 76 #include "session.h" 77 #include "servconf.h" 78 #include "roaming.h" 79 80 /* Imports */ 81 extern int compat20; 82 extern z_stream incoming_stream; 83 extern z_stream outgoing_stream; 84 extern struct monitor *pmonitor; 85 extern Buffer loginmsg; 86 extern ServerOptions options; 87 88 int 89 mm_is_monitor(void) 90 { 91 /* 92 * m_pid is only set in the privileged part, and 93 * points to the unprivileged child. 94 */ 95 return (pmonitor && pmonitor->m_pid > 0); 96 } 97 98 void 99 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) 100 { 101 u_int mlen = buffer_len(m); 102 u_char buf[5]; 103 104 debug3("%s entering: type %d", __func__, type); 105 106 put_u32(buf, mlen + 1); 107 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ 108 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) 109 fatal("%s: write: %s", __func__, strerror(errno)); 110 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) 111 fatal("%s: write: %s", __func__, strerror(errno)); 112 } 113 114 void 115 mm_request_receive(int sock, Buffer *m) 116 { 117 u_char buf[4]; 118 u_int msg_len; 119 120 debug3("%s entering", __func__); 121 122 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { 123 if (errno == EPIPE) 124 cleanup_exit(255); 125 fatal("%s: read: %s", __func__, strerror(errno)); 126 } 127 msg_len = get_u32(buf); 128 if (msg_len > 256 * 1024) 129 fatal("%s: read: bad msg_len %d", __func__, msg_len); 130 buffer_clear(m); 131 buffer_append_space(m, msg_len); 132 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) 133 fatal("%s: read: %s", __func__, strerror(errno)); 134 } 135 136 void 137 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) 138 { 139 u_char rtype; 140 141 debug3("%s entering: type %d", __func__, type); 142 143 mm_request_receive(sock, m); 144 rtype = buffer_get_char(m); 145 if (rtype != type) 146 fatal("%s: read: rtype %d != type %d", __func__, 147 rtype, type); 148 } 149 150 DH * 151 mm_choose_dh(int min, int nbits, int max) 152 { 153 BIGNUM *p, *g; 154 int success = 0; 155 Buffer m; 156 157 buffer_init(&m); 158 buffer_put_int(&m, min); 159 buffer_put_int(&m, nbits); 160 buffer_put_int(&m, max); 161 162 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); 163 164 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); 165 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); 166 167 success = buffer_get_char(&m); 168 if (success == 0) 169 fatal("%s: MONITOR_ANS_MODULI failed", __func__); 170 171 if ((p = BN_new()) == NULL) 172 fatal("%s: BN_new failed", __func__); 173 if ((g = BN_new()) == NULL) 174 fatal("%s: BN_new failed", __func__); 175 buffer_get_bignum2(&m, p); 176 buffer_get_bignum2(&m, g); 177 178 debug3("%s: remaining %d", __func__, buffer_len(&m)); 179 buffer_free(&m); 180 181 return (dh_new_group(g, p)); 182 } 183 184 int 185 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) 186 { 187 Kex *kex = *pmonitor->m_pkex; 188 Buffer m; 189 190 debug3("%s entering", __func__); 191 192 buffer_init(&m); 193 buffer_put_int(&m, kex->host_key_index(key)); 194 buffer_put_string(&m, data, datalen); 195 196 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); 197 198 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); 199 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); 200 *sigp = buffer_get_string(&m, lenp); 201 buffer_free(&m); 202 203 return (0); 204 } 205 206 struct passwd * 207 mm_getpwnamallow(const char *username) 208 { 209 Buffer m; 210 struct passwd *pw; 211 u_int len; 212 ServerOptions *newopts; 213 214 debug3("%s entering", __func__); 215 216 buffer_init(&m); 217 buffer_put_cstring(&m, username); 218 219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); 220 221 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); 222 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); 223 224 if (buffer_get_char(&m) == 0) { 225 pw = NULL; 226 goto out; 227 } 228 pw = buffer_get_string(&m, &len); 229 if (len != sizeof(struct passwd)) 230 fatal("%s: struct passwd size mismatch", __func__); 231 pw->pw_name = buffer_get_string(&m, NULL); 232 pw->pw_passwd = buffer_get_string(&m, NULL); 233 pw->pw_gecos = buffer_get_string(&m, NULL); 234 pw->pw_class = buffer_get_string(&m, NULL); 235 pw->pw_dir = buffer_get_string(&m, NULL); 236 pw->pw_shell = buffer_get_string(&m, NULL); 237 238 out: 239 /* copy options block as a Match directive may have changed some */ 240 newopts = buffer_get_string(&m, &len); 241 if (len != sizeof(*newopts)) 242 fatal("%s: option block size mismatch", __func__); 243 if (newopts->banner != NULL) 244 newopts->banner = buffer_get_string(&m, NULL); 245 copy_set_server_options(&options, newopts, 1); 246 xfree(newopts); 247 248 buffer_free(&m); 249 250 return (pw); 251 } 252 253 char * 254 mm_auth2_read_banner(void) 255 { 256 Buffer m; 257 char *banner; 258 259 debug3("%s entering", __func__); 260 261 buffer_init(&m); 262 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); 263 buffer_clear(&m); 264 265 mm_request_receive_expect(pmonitor->m_recvfd, 266 MONITOR_ANS_AUTH2_READ_BANNER, &m); 267 banner = buffer_get_string(&m, NULL); 268 buffer_free(&m); 269 270 /* treat empty banner as missing banner */ 271 if (strlen(banner) == 0) { 272 xfree(banner); 273 banner = NULL; 274 } 275 return (banner); 276 } 277 278 /* Inform the privileged process about service and style */ 279 280 void 281 mm_inform_authserv(char *service, char *style) 282 { 283 Buffer m; 284 285 debug3("%s entering", __func__); 286 287 buffer_init(&m); 288 buffer_put_cstring(&m, service); 289 buffer_put_cstring(&m, style ? style : ""); 290 291 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); 292 293 buffer_free(&m); 294 } 295 296 /* Do the password authentication */ 297 int 298 mm_auth_password(Authctxt *authctxt, char *password) 299 { 300 Buffer m; 301 int authenticated = 0; 302 303 debug3("%s entering", __func__); 304 305 buffer_init(&m); 306 buffer_put_cstring(&m, password); 307 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); 308 309 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); 310 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); 311 312 authenticated = buffer_get_int(&m); 313 314 buffer_free(&m); 315 316 debug3("%s: user %sauthenticated", 317 __func__, authenticated ? "" : "not "); 318 return (authenticated); 319 } 320 321 int 322 mm_user_key_allowed(struct passwd *pw, Key *key) 323 { 324 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); 325 } 326 327 int 328 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, 329 Key *key) 330 { 331 return (mm_key_allowed(MM_HOSTKEY, user, host, key)); 332 } 333 334 int 335 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, 336 char *host, Key *key) 337 { 338 int ret; 339 340 key->type = KEY_RSA; /* XXX hack for key_to_blob */ 341 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); 342 key->type = KEY_RSA1; 343 return (ret); 344 } 345 346 int 347 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) 348 { 349 Buffer m; 350 u_char *blob; 351 u_int len; 352 int allowed = 0, have_forced = 0; 353 354 debug3("%s entering", __func__); 355 356 /* Convert the key to a blob and the pass it over */ 357 if (!key_to_blob(key, &blob, &len)) 358 return (0); 359 360 buffer_init(&m); 361 buffer_put_int(&m, type); 362 buffer_put_cstring(&m, user ? user : ""); 363 buffer_put_cstring(&m, host ? host : ""); 364 buffer_put_string(&m, blob, len); 365 xfree(blob); 366 367 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); 368 369 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); 370 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); 371 372 allowed = buffer_get_int(&m); 373 374 /* fake forced command */ 375 auth_clear_options(); 376 have_forced = buffer_get_int(&m); 377 forced_command = have_forced ? xstrdup("true") : NULL; 378 379 buffer_free(&m); 380 381 return (allowed); 382 } 383 384 /* 385 * This key verify needs to send the key type along, because the 386 * privileged parent makes the decision if the key is allowed 387 * for authentication. 388 */ 389 390 int 391 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) 392 { 393 Buffer m; 394 u_char *blob; 395 u_int len; 396 int verified = 0; 397 398 debug3("%s entering", __func__); 399 400 /* Convert the key to a blob and the pass it over */ 401 if (!key_to_blob(key, &blob, &len)) 402 return (0); 403 404 buffer_init(&m); 405 buffer_put_string(&m, blob, len); 406 buffer_put_string(&m, sig, siglen); 407 buffer_put_string(&m, data, datalen); 408 xfree(blob); 409 410 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); 411 412 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); 413 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); 414 415 verified = buffer_get_int(&m); 416 417 buffer_free(&m); 418 419 return (verified); 420 } 421 422 /* Export key state after authentication */ 423 Newkeys * 424 mm_newkeys_from_blob(u_char *blob, int blen) 425 { 426 Buffer b; 427 u_int len; 428 Newkeys *newkey = NULL; 429 Enc *enc; 430 Mac *mac; 431 Comp *comp; 432 433 debug3("%s: %p(%d)", __func__, blob, blen); 434 #ifdef DEBUG_PK 435 dump_base64(stderr, blob, blen); 436 #endif 437 buffer_init(&b); 438 buffer_append(&b, blob, blen); 439 440 newkey = xmalloc(sizeof(*newkey)); 441 enc = &newkey->enc; 442 mac = &newkey->mac; 443 comp = &newkey->comp; 444 445 /* Enc structure */ 446 enc->name = buffer_get_string(&b, NULL); 447 buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); 448 enc->enabled = buffer_get_int(&b); 449 enc->block_size = buffer_get_int(&b); 450 enc->key = buffer_get_string(&b, &enc->key_len); 451 enc->iv = buffer_get_string(&b, &len); 452 if (len != enc->block_size) 453 fatal("%s: bad ivlen: expected %u != %u", __func__, 454 enc->block_size, len); 455 456 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) 457 fatal("%s: bad cipher name %s or pointer %p", __func__, 458 enc->name, enc->cipher); 459 460 /* Mac structure */ 461 mac->name = buffer_get_string(&b, NULL); 462 if (mac->name == NULL || mac_setup(mac, mac->name) == -1) 463 fatal("%s: can not setup mac %s", __func__, mac->name); 464 mac->enabled = buffer_get_int(&b); 465 mac->key = buffer_get_string(&b, &len); 466 if (len > mac->key_len) 467 fatal("%s: bad mac key length: %u > %d", __func__, len, 468 mac->key_len); 469 mac->key_len = len; 470 471 /* Comp structure */ 472 comp->type = buffer_get_int(&b); 473 comp->enabled = buffer_get_int(&b); 474 comp->name = buffer_get_string(&b, NULL); 475 476 len = buffer_len(&b); 477 if (len != 0) 478 error("newkeys_from_blob: remaining bytes in blob %u", len); 479 buffer_free(&b); 480 return (newkey); 481 } 482 483 int 484 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) 485 { 486 Buffer b; 487 int len; 488 Enc *enc; 489 Mac *mac; 490 Comp *comp; 491 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode); 492 493 debug3("%s: converting %p", __func__, newkey); 494 495 if (newkey == NULL) { 496 error("%s: newkey == NULL", __func__); 497 return 0; 498 } 499 enc = &newkey->enc; 500 mac = &newkey->mac; 501 comp = &newkey->comp; 502 503 buffer_init(&b); 504 /* Enc structure */ 505 buffer_put_cstring(&b, enc->name); 506 /* The cipher struct is constant and shared, you export pointer */ 507 buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); 508 buffer_put_int(&b, enc->enabled); 509 buffer_put_int(&b, enc->block_size); 510 buffer_put_string(&b, enc->key, enc->key_len); 511 packet_get_keyiv(mode, enc->iv, enc->block_size); 512 buffer_put_string(&b, enc->iv, enc->block_size); 513 514 /* Mac structure */ 515 buffer_put_cstring(&b, mac->name); 516 buffer_put_int(&b, mac->enabled); 517 buffer_put_string(&b, mac->key, mac->key_len); 518 519 /* Comp structure */ 520 buffer_put_int(&b, comp->type); 521 buffer_put_int(&b, comp->enabled); 522 buffer_put_cstring(&b, comp->name); 523 524 len = buffer_len(&b); 525 if (lenp != NULL) 526 *lenp = len; 527 if (blobp != NULL) { 528 *blobp = xmalloc(len); 529 memcpy(*blobp, buffer_ptr(&b), len); 530 } 531 memset(buffer_ptr(&b), 0, len); 532 buffer_free(&b); 533 return len; 534 } 535 536 static void 537 mm_send_kex(Buffer *m, Kex *kex) 538 { 539 buffer_put_string(m, kex->session_id, kex->session_id_len); 540 buffer_put_int(m, kex->we_need); 541 buffer_put_int(m, kex->hostkey_type); 542 buffer_put_int(m, kex->kex_type); 543 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); 544 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); 545 buffer_put_int(m, kex->flags); 546 buffer_put_cstring(m, kex->client_version_string); 547 buffer_put_cstring(m, kex->server_version_string); 548 } 549 550 void 551 mm_send_keystate(struct monitor *monitor) 552 { 553 Buffer m, *input, *output; 554 u_char *blob, *p; 555 u_int bloblen, plen; 556 u_int32_t seqnr, packets; 557 u_int64_t blocks, bytes; 558 559 buffer_init(&m); 560 561 if (!compat20) { 562 u_char iv[24]; 563 u_char *key; 564 u_int ivlen, keylen; 565 566 buffer_put_int(&m, packet_get_protocol_flags()); 567 568 buffer_put_int(&m, packet_get_ssh1_cipher()); 569 570 debug3("%s: Sending ssh1 KEY+IV", __func__); 571 keylen = packet_get_encryption_key(NULL); 572 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ 573 keylen = packet_get_encryption_key(key); 574 buffer_put_string(&m, key, keylen); 575 memset(key, 0, keylen); 576 xfree(key); 577 578 ivlen = packet_get_keyiv_len(MODE_OUT); 579 packet_get_keyiv(MODE_OUT, iv, ivlen); 580 buffer_put_string(&m, iv, ivlen); 581 ivlen = packet_get_keyiv_len(MODE_OUT); 582 packet_get_keyiv(MODE_IN, iv, ivlen); 583 buffer_put_string(&m, iv, ivlen); 584 goto skip; 585 } else { 586 /* Kex for rekeying */ 587 mm_send_kex(&m, *monitor->m_pkex); 588 } 589 590 debug3("%s: Sending new keys: %p %p", 591 __func__, packet_get_newkeys(MODE_OUT), 592 packet_get_newkeys(MODE_IN)); 593 594 /* Keys from Kex */ 595 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) 596 fatal("%s: conversion of newkeys failed", __func__); 597 598 buffer_put_string(&m, blob, bloblen); 599 xfree(blob); 600 601 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) 602 fatal("%s: conversion of newkeys failed", __func__); 603 604 buffer_put_string(&m, blob, bloblen); 605 xfree(blob); 606 607 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); 608 buffer_put_int(&m, seqnr); 609 buffer_put_int64(&m, blocks); 610 buffer_put_int(&m, packets); 611 buffer_put_int64(&m, bytes); 612 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); 613 buffer_put_int(&m, seqnr); 614 buffer_put_int64(&m, blocks); 615 buffer_put_int(&m, packets); 616 buffer_put_int64(&m, bytes); 617 618 debug3("%s: New keys have been sent", __func__); 619 skip: 620 /* More key context */ 621 plen = packet_get_keycontext(MODE_OUT, NULL); 622 p = xmalloc(plen+1); 623 packet_get_keycontext(MODE_OUT, p); 624 buffer_put_string(&m, p, plen); 625 xfree(p); 626 627 plen = packet_get_keycontext(MODE_IN, NULL); 628 p = xmalloc(plen+1); 629 packet_get_keycontext(MODE_IN, p); 630 buffer_put_string(&m, p, plen); 631 xfree(p); 632 633 /* Compression state */ 634 debug3("%s: Sending compression state", __func__); 635 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); 636 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); 637 638 /* Network I/O buffers */ 639 input = (Buffer *)packet_get_input(); 640 output = (Buffer *)packet_get_output(); 641 buffer_put_string(&m, buffer_ptr(input), buffer_len(input)); 642 buffer_put_string(&m, buffer_ptr(output), buffer_len(output)); 643 644 /* Roaming */ 645 if (compat20) { 646 buffer_put_int64(&m, get_sent_bytes()); 647 buffer_put_int64(&m, get_recv_bytes()); 648 } 649 650 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); 651 debug3("%s: Finished sending state", __func__); 652 653 buffer_free(&m); 654 } 655 656 int 657 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) 658 { 659 Buffer m; 660 char *p, *msg; 661 int success = 0, tmp1 = -1, tmp2 = -1; 662 663 /* Kludge: ensure there are fds free to receive the pty/tty */ 664 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || 665 (tmp2 = dup(pmonitor->m_recvfd)) == -1) { 666 error("%s: cannot allocate fds for pty", __func__); 667 if (tmp1 > 0) 668 close(tmp1); 669 if (tmp2 > 0) 670 close(tmp2); 671 return 0; 672 } 673 close(tmp1); 674 close(tmp2); 675 676 buffer_init(&m); 677 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); 678 679 debug3("%s: waiting for MONITOR_ANS_PTY", __func__); 680 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); 681 682 success = buffer_get_int(&m); 683 if (success == 0) { 684 debug3("%s: pty alloc failed", __func__); 685 buffer_free(&m); 686 return (0); 687 } 688 p = buffer_get_string(&m, NULL); 689 msg = buffer_get_string(&m, NULL); 690 buffer_free(&m); 691 692 strlcpy(namebuf, p, namebuflen); /* Possible truncation */ 693 xfree(p); 694 695 buffer_append(&loginmsg, msg, strlen(msg)); 696 xfree(msg); 697 698 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || 699 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) 700 fatal("%s: receive fds failed", __func__); 701 702 /* Success */ 703 return (1); 704 } 705 706 void 707 mm_session_pty_cleanup2(Session *s) 708 { 709 Buffer m; 710 711 if (s->ttyfd == -1) 712 return; 713 buffer_init(&m); 714 buffer_put_cstring(&m, s->tty); 715 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); 716 buffer_free(&m); 717 718 /* closed dup'ed master */ 719 if (s->ptymaster != -1 && close(s->ptymaster) < 0) 720 error("close(s->ptymaster/%d): %s", 721 s->ptymaster, strerror(errno)); 722 723 /* unlink pty from session */ 724 s->ttyfd = -1; 725 } 726 727 #ifdef USE_PAM 728 void 729 mm_start_pam(Authctxt *authctxt) 730 { 731 Buffer m; 732 733 debug3("%s entering", __func__); 734 if (!options.use_pam) 735 fatal("UsePAM=no, but ended up in %s anyway", __func__); 736 737 buffer_init(&m); 738 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); 739 740 buffer_free(&m); 741 } 742 743 u_int 744 mm_do_pam_account(void) 745 { 746 Buffer m; 747 u_int ret; 748 char *msg; 749 750 debug3("%s entering", __func__); 751 if (!options.use_pam) 752 fatal("UsePAM=no, but ended up in %s anyway", __func__); 753 754 buffer_init(&m); 755 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); 756 757 mm_request_receive_expect(pmonitor->m_recvfd, 758 MONITOR_ANS_PAM_ACCOUNT, &m); 759 ret = buffer_get_int(&m); 760 msg = buffer_get_string(&m, NULL); 761 buffer_append(&loginmsg, msg, strlen(msg)); 762 xfree(msg); 763 764 buffer_free(&m); 765 766 debug3("%s returning %d", __func__, ret); 767 768 return (ret); 769 } 770 771 void * 772 mm_sshpam_init_ctx(Authctxt *authctxt) 773 { 774 Buffer m; 775 int success; 776 777 debug3("%s", __func__); 778 buffer_init(&m); 779 buffer_put_cstring(&m, authctxt->user); 780 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); 781 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); 782 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); 783 success = buffer_get_int(&m); 784 if (success == 0) { 785 debug3("%s: pam_init_ctx failed", __func__); 786 buffer_free(&m); 787 return (NULL); 788 } 789 buffer_free(&m); 790 return (authctxt); 791 } 792 793 int 794 mm_sshpam_query(void *ctx, char **name, char **info, 795 u_int *num, char ***prompts, u_int **echo_on) 796 { 797 Buffer m; 798 u_int i; 799 int ret; 800 801 debug3("%s", __func__); 802 buffer_init(&m); 803 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); 804 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); 805 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); 806 ret = buffer_get_int(&m); 807 debug3("%s: pam_query returned %d", __func__, ret); 808 *name = buffer_get_string(&m, NULL); 809 *info = buffer_get_string(&m, NULL); 810 *num = buffer_get_int(&m); 811 if (*num > PAM_MAX_NUM_MSG) 812 fatal("%s: received %u PAM messages, expected <= %u", 813 __func__, *num, PAM_MAX_NUM_MSG); 814 *prompts = xcalloc((*num + 1), sizeof(char *)); 815 *echo_on = xcalloc((*num + 1), sizeof(u_int)); 816 for (i = 0; i < *num; ++i) { 817 (*prompts)[i] = buffer_get_string(&m, NULL); 818 (*echo_on)[i] = buffer_get_int(&m); 819 } 820 buffer_free(&m); 821 return (ret); 822 } 823 824 int 825 mm_sshpam_respond(void *ctx, u_int num, char **resp) 826 { 827 Buffer m; 828 u_int i; 829 int ret; 830 831 debug3("%s", __func__); 832 buffer_init(&m); 833 buffer_put_int(&m, num); 834 for (i = 0; i < num; ++i) 835 buffer_put_cstring(&m, resp[i]); 836 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); 837 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); 838 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); 839 ret = buffer_get_int(&m); 840 debug3("%s: pam_respond returned %d", __func__, ret); 841 buffer_free(&m); 842 return (ret); 843 } 844 845 void 846 mm_sshpam_free_ctx(void *ctxtp) 847 { 848 Buffer m; 849 850 debug3("%s", __func__); 851 buffer_init(&m); 852 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); 853 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); 854 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); 855 buffer_free(&m); 856 } 857 #endif /* USE_PAM */ 858 859 /* Request process termination */ 860 861 void 862 mm_terminate(void) 863 { 864 Buffer m; 865 866 buffer_init(&m); 867 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); 868 buffer_free(&m); 869 } 870 871 int 872 mm_ssh1_session_key(BIGNUM *num) 873 { 874 int rsafail; 875 Buffer m; 876 877 buffer_init(&m); 878 buffer_put_bignum2(&m, num); 879 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); 880 881 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); 882 883 rsafail = buffer_get_int(&m); 884 buffer_get_bignum2(&m, num); 885 886 buffer_free(&m); 887 888 return (rsafail); 889 } 890 891 #if defined(BSD_AUTH) || defined(SKEY) 892 static void 893 mm_chall_setup(char **name, char **infotxt, u_int *numprompts, 894 char ***prompts, u_int **echo_on) 895 { 896 *name = xstrdup(""); 897 *infotxt = xstrdup(""); 898 *numprompts = 1; 899 *prompts = xcalloc(*numprompts, sizeof(char *)); 900 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 901 (*echo_on)[0] = 0; 902 } 903 #endif 904 905 #ifdef BSD_AUTH 906 int 907 mm_bsdauth_query(void *ctx, char **name, char **infotxt, 908 u_int *numprompts, char ***prompts, u_int **echo_on) 909 { 910 Buffer m; 911 u_int success; 912 char *challenge; 913 914 debug3("%s: entering", __func__); 915 916 buffer_init(&m); 917 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); 918 919 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, 920 &m); 921 success = buffer_get_int(&m); 922 if (success == 0) { 923 debug3("%s: no challenge", __func__); 924 buffer_free(&m); 925 return (-1); 926 } 927 928 /* Get the challenge, and format the response */ 929 challenge = buffer_get_string(&m, NULL); 930 buffer_free(&m); 931 932 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); 933 (*prompts)[0] = challenge; 934 935 debug3("%s: received challenge: %s", __func__, challenge); 936 937 return (0); 938 } 939 940 int 941 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) 942 { 943 Buffer m; 944 int authok; 945 946 debug3("%s: entering", __func__); 947 if (numresponses != 1) 948 return (-1); 949 950 buffer_init(&m); 951 buffer_put_cstring(&m, responses[0]); 952 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); 953 954 mm_request_receive_expect(pmonitor->m_recvfd, 955 MONITOR_ANS_BSDAUTHRESPOND, &m); 956 957 authok = buffer_get_int(&m); 958 buffer_free(&m); 959 960 return ((authok == 0) ? -1 : 0); 961 } 962 #endif 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 GSSAPI 1138 OM_uint32 1139 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) 1140 { 1141 Buffer m; 1142 OM_uint32 major; 1143 1144 /* Client doesn't get to see the context */ 1145 *ctx = NULL; 1146 1147 buffer_init(&m); 1148 buffer_put_string(&m, goid->elements, goid->length); 1149 1150 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); 1151 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); 1152 1153 major = buffer_get_int(&m); 1154 1155 buffer_free(&m); 1156 return (major); 1157 } 1158 1159 OM_uint32 1160 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, 1161 gss_buffer_desc *out, OM_uint32 *flags) 1162 { 1163 Buffer m; 1164 OM_uint32 major; 1165 u_int len; 1166 1167 buffer_init(&m); 1168 buffer_put_string(&m, in->value, in->length); 1169 1170 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); 1171 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); 1172 1173 major = buffer_get_int(&m); 1174 out->value = buffer_get_string(&m, &len); 1175 out->length = len; 1176 if (flags) 1177 *flags = buffer_get_int(&m); 1178 1179 buffer_free(&m); 1180 1181 return (major); 1182 } 1183 1184 OM_uint32 1185 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) 1186 { 1187 Buffer m; 1188 OM_uint32 major; 1189 1190 buffer_init(&m); 1191 buffer_put_string(&m, gssbuf->value, gssbuf->length); 1192 buffer_put_string(&m, gssmic->value, gssmic->length); 1193 1194 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); 1195 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, 1196 &m); 1197 1198 major = buffer_get_int(&m); 1199 buffer_free(&m); 1200 return(major); 1201 } 1202 1203 int 1204 mm_ssh_gssapi_userok(char *user) 1205 { 1206 Buffer m; 1207 int authenticated = 0; 1208 1209 buffer_init(&m); 1210 1211 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); 1212 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, 1213 &m); 1214 1215 authenticated = buffer_get_int(&m); 1216 1217 buffer_free(&m); 1218 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); 1219 return (authenticated); 1220 } 1221 #endif /* GSSAPI */ 1222 1223 #ifdef JPAKE 1224 void 1225 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, 1226 char **hash_scheme, char **salt) 1227 { 1228 Buffer m; 1229 1230 debug3("%s entering", __func__); 1231 1232 buffer_init(&m); 1233 mm_request_send(pmonitor->m_recvfd, 1234 MONITOR_REQ_JPAKE_GET_PWDATA, &m); 1235 1236 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); 1237 mm_request_receive_expect(pmonitor->m_recvfd, 1238 MONITOR_ANS_JPAKE_GET_PWDATA, &m); 1239 1240 *hash_scheme = buffer_get_string(&m, NULL); 1241 *salt = buffer_get_string(&m, NULL); 1242 1243 buffer_free(&m); 1244 } 1245 1246 void 1247 mm_jpake_step1(struct modp_group *grp, 1248 u_char **id, u_int *id_len, 1249 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, 1250 u_char **priv1_proof, u_int *priv1_proof_len, 1251 u_char **priv2_proof, u_int *priv2_proof_len) 1252 { 1253 Buffer m; 1254 1255 debug3("%s entering", __func__); 1256 1257 buffer_init(&m); 1258 mm_request_send(pmonitor->m_recvfd, 1259 MONITOR_REQ_JPAKE_STEP1, &m); 1260 1261 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); 1262 mm_request_receive_expect(pmonitor->m_recvfd, 1263 MONITOR_ANS_JPAKE_STEP1, &m); 1264 1265 if ((*priv1 = BN_new()) == NULL || 1266 (*priv2 = BN_new()) == NULL || 1267 (*g_priv1 = BN_new()) == NULL || 1268 (*g_priv2 = BN_new()) == NULL) 1269 fatal("%s: BN_new", __func__); 1270 1271 *id = buffer_get_string(&m, id_len); 1272 /* priv1 and priv2 are, well, private */ 1273 buffer_get_bignum2(&m, *g_priv1); 1274 buffer_get_bignum2(&m, *g_priv2); 1275 *priv1_proof = buffer_get_string(&m, priv1_proof_len); 1276 *priv2_proof = buffer_get_string(&m, priv2_proof_len); 1277 1278 buffer_free(&m); 1279 } 1280 1281 void 1282 mm_jpake_step2(struct modp_group *grp, BIGNUM *s, 1283 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, 1284 const u_char *theirid, u_int theirid_len, 1285 const u_char *myid, u_int myid_len, 1286 const u_char *theirpub1_proof, u_int theirpub1_proof_len, 1287 const u_char *theirpub2_proof, u_int theirpub2_proof_len, 1288 BIGNUM **newpub, 1289 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) 1290 { 1291 Buffer m; 1292 1293 debug3("%s entering", __func__); 1294 1295 buffer_init(&m); 1296 /* monitor already has all bignums except theirpub1, theirpub2 */ 1297 buffer_put_bignum2(&m, theirpub1); 1298 buffer_put_bignum2(&m, theirpub2); 1299 /* monitor already knows our id */ 1300 buffer_put_string(&m, theirid, theirid_len); 1301 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); 1302 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); 1303 1304 mm_request_send(pmonitor->m_recvfd, 1305 MONITOR_REQ_JPAKE_STEP2, &m); 1306 1307 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); 1308 mm_request_receive_expect(pmonitor->m_recvfd, 1309 MONITOR_ANS_JPAKE_STEP2, &m); 1310 1311 if ((*newpub = BN_new()) == NULL) 1312 fatal("%s: BN_new", __func__); 1313 1314 buffer_get_bignum2(&m, *newpub); 1315 *newpub_exponent_proof = buffer_get_string(&m, 1316 newpub_exponent_proof_len); 1317 1318 buffer_free(&m); 1319 } 1320 1321 void 1322 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val, 1323 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, 1324 BIGNUM *theirpub1, BIGNUM *theirpub2, 1325 const u_char *my_id, u_int my_id_len, 1326 const u_char *their_id, u_int their_id_len, 1327 const u_char *sess_id, u_int sess_id_len, 1328 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, 1329 BIGNUM **k, 1330 u_char **confirm_hash, u_int *confirm_hash_len) 1331 { 1332 Buffer m; 1333 1334 debug3("%s entering", __func__); 1335 1336 buffer_init(&m); 1337 /* monitor already has all bignums except step2_val */ 1338 buffer_put_bignum2(&m, step2_val); 1339 /* monitor already knows all the ids */ 1340 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); 1341 1342 mm_request_send(pmonitor->m_recvfd, 1343 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); 1344 1345 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); 1346 mm_request_receive_expect(pmonitor->m_recvfd, 1347 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); 1348 1349 /* 'k' is sensitive and stays in the monitor */ 1350 *confirm_hash = buffer_get_string(&m, confirm_hash_len); 1351 1352 buffer_free(&m); 1353 } 1354 1355 int 1356 mm_jpake_check_confirm(const BIGNUM *k, 1357 const u_char *peer_id, u_int peer_id_len, 1358 const u_char *sess_id, u_int sess_id_len, 1359 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) 1360 { 1361 Buffer m; 1362 int success = 0; 1363 1364 debug3("%s entering", __func__); 1365 1366 buffer_init(&m); 1367 /* k is dummy in slave, ignored */ 1368 /* monitor knows all the ids */ 1369 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); 1370 mm_request_send(pmonitor->m_recvfd, 1371 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); 1372 1373 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); 1374 mm_request_receive_expect(pmonitor->m_recvfd, 1375 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); 1376 1377 success = buffer_get_int(&m); 1378 buffer_free(&m); 1379 1380 debug3("%s: success = %d", __func__, success); 1381 return success; 1382 } 1383 #endif /* JPAKE */ 1384 1385 #ifdef KRB4 1386 int 1387 mm_auth_krb4(Authctxt *authctxt, void *_auth, char **client, void *_reply) 1388 { 1389 KTEXT auth, reply; 1390 Buffer m; 1391 u_int rlen; 1392 int success = 0; 1393 char *p; 1394 1395 debug3("%s entering", __func__); 1396 auth = _auth; 1397 reply = _reply; 1398 1399 buffer_init(&m); 1400 buffer_put_string(&m, auth->dat, auth->length); 1401 1402 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB4, &m); 1403 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB4, &m); 1404 1405 success = buffer_get_int(&m); 1406 if (success) { 1407 *client = buffer_get_string(&m, NULL); 1408 p = buffer_get_string(&m, &rlen); 1409 if (rlen >= MAX_KTXT_LEN) 1410 fatal("%s: reply from monitor too large", __func__); 1411 reply->length = rlen; 1412 memcpy(reply->dat, p, rlen); 1413 memset(p, 0, rlen); 1414 xfree(p); 1415 } 1416 buffer_free(&m); 1417 return (success); 1418 } 1419 #endif 1420 1421 #ifdef KRB5 1422 int 1423 mm_auth_krb5(void *ctx, void *argp, char **userp, void *resp) 1424 { 1425 krb5_data *tkt, *reply; 1426 Buffer m; 1427 int success; 1428 1429 debug3("%s entering", __func__); 1430 tkt = (krb5_data *) argp; 1431 reply = (krb5_data *) resp; 1432 1433 buffer_init(&m); 1434 buffer_put_string(&m, tkt->data, tkt->length); 1435 1436 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB5, &m); 1437 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB5, &m); 1438 1439 success = buffer_get_int(&m); 1440 if (success) { 1441 u_int len; 1442 1443 *userp = buffer_get_string(&m, NULL); 1444 reply->data = buffer_get_string(&m, &len); 1445 reply->length = len; 1446 } else { 1447 memset(reply, 0, sizeof(*reply)); 1448 *userp = NULL; 1449 } 1450 1451 buffer_free(&m); 1452 return (success); 1453 } 1454 #endif 1455