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b5afdff5 1/* $OpenBSD: monitor_wrap.c,v 1.68 2009/06/22 05:39:28 dtucker Exp $ */
826f3a39 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"
30460aeb 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>
826f3a39 40
41#include <openssl/bn.h>
42#include <openssl/dh.h>
5262cbfb 43#include <openssl/evp.h>
826f3a39 44
5156b1a1 45#include "openbsd-compat/sys-queue.h"
30460aeb 46#include "xmalloc.h"
826f3a39 47#include "ssh.h"
48#include "dh.h"
30460aeb 49#include "buffer.h"
50#include "key.h"
51#include "cipher.h"
826f3a39 52#include "kex.h"
30460aeb 53#include "hostfile.h"
826f3a39 54#include "auth.h"
bfe49944 55#include "auth-options.h"
826f3a39 56#include "packet.h"
57#include "mac.h"
58#include "log.h"
12a403af 59#ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
60#undef TARGET_OS_MAC
826f3a39 61#include "zlib.h"
12a403af 62#define TARGET_OS_MAC 1
63#else
64#include "zlib.h"
65#endif
826f3a39 66#include "monitor.h"
30460aeb 67#ifdef GSSAPI
68#include "ssh-gss.h"
69#endif
826f3a39 70#include "monitor_wrap.h"
826f3a39 71#include "atomicio.h"
72#include "monitor_fdpass.h"
30460aeb 73#include "misc.h"
b5afdff5 74#include "schnorr.h"
5262cbfb 75#include "jpake.h"
826f3a39 76
826f3a39 77#include "channels.h"
78#include "session.h"
0b90ac93 79#include "servconf.h"
b5afdff5 80#include "roaming.h"
826f3a39 81
82/* Imports */
83extern int compat20;
826f3a39 84extern z_stream incoming_stream;
85extern z_stream outgoing_stream;
86extern struct monitor *pmonitor;
7e82606e 87extern Buffer loginmsg;
7cac2b65 88extern ServerOptions options;
826f3a39 89
540d72c3 90int
91mm_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
826f3a39 100void
7e82606e 101mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
826f3a39 102{
826f3a39 103 u_int mlen = buffer_len(m);
d03f4262 104 u_char buf[5];
826f3a39 105
44a053a3 106 debug3("%s entering: type %d", __func__, type);
826f3a39 107
30460aeb 108 put_u32(buf, mlen + 1);
44a053a3 109 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
7e82606e 110 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
2ce0bfe4 111 fatal("%s: write: %s", __func__, strerror(errno));
7e82606e 112 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
2ce0bfe4 113 fatal("%s: write: %s", __func__, strerror(errno));
826f3a39 114}
115
116void
7e82606e 117mm_request_receive(int sock, Buffer *m)
826f3a39 118{
119 u_char buf[4];
826f3a39 120 u_int msg_len;
121
44a053a3 122 debug3("%s entering", __func__);
826f3a39 123
2ce0bfe4 124 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
125 if (errno == EPIPE)
540d72c3 126 cleanup_exit(255);
2ce0bfe4 127 fatal("%s: read: %s", __func__, strerror(errno));
826f3a39 128 }
30460aeb 129 msg_len = get_u32(buf);
826f3a39 130 if (msg_len > 256 * 1024)
44a053a3 131 fatal("%s: read: bad msg_len %d", __func__, msg_len);
826f3a39 132 buffer_clear(m);
133 buffer_append_space(m, msg_len);
2ce0bfe4 134 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
135 fatal("%s: read: %s", __func__, strerror(errno));
826f3a39 136}
137
138void
7e82606e 139mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
826f3a39 140{
141 u_char rtype;
142
44a053a3 143 debug3("%s entering: type %d", __func__, type);
826f3a39 144
7e82606e 145 mm_request_receive(sock, m);
826f3a39 146 rtype = buffer_get_char(m);
147 if (rtype != type)
44a053a3 148 fatal("%s: read: rtype %d != type %d", __func__,
826f3a39 149 rtype, type);
150}
151
152DH *
153mm_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
44a053a3 166 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
826f3a39 167 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
168
169 success = buffer_get_char(&m);
170 if (success == 0)
44a053a3 171 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
826f3a39 172
173 if ((p = BN_new()) == NULL)
44a053a3 174 fatal("%s: BN_new failed", __func__);
826f3a39 175 if ((g = BN_new()) == NULL)
44a053a3 176 fatal("%s: BN_new failed", __func__);
826f3a39 177 buffer_get_bignum2(&m, p);
178 buffer_get_bignum2(&m, g);
179
44a053a3 180 debug3("%s: remaining %d", __func__, buffer_len(&m));
826f3a39 181 buffer_free(&m);
182
183 return (dh_new_group(g, p));
184}
185
186int
187mm_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
44a053a3 192 debug3("%s entering", __func__);
826f3a39 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
44a053a3 200 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
826f3a39 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
208struct passwd *
7e82606e 209mm_getpwnamallow(const char *username)
826f3a39 210{
211 Buffer m;
212 struct passwd *pw;
0b90ac93 213 u_int len;
214 ServerOptions *newopts;
826f3a39 215
44a053a3 216 debug3("%s entering", __func__);
826f3a39 217
218 buffer_init(&m);
7e82606e 219 buffer_put_cstring(&m, username);
826f3a39 220
221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
222
44a053a3 223 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
826f3a39 224 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
225
226 if (buffer_get_char(&m) == 0) {
e74dc197 227 pw = NULL;
228 goto out;
826f3a39 229 }
0b90ac93 230 pw = buffer_get_string(&m, &len);
231 if (len != sizeof(struct passwd))
44a053a3 232 fatal("%s: struct passwd size mismatch", __func__);
826f3a39 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);
0b90ac93 241
e74dc197 242out:
0b90ac93 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
826f3a39 252 buffer_free(&m);
253
254 return (pw);
255}
256
540d72c3 257char *
258mm_auth2_read_banner(void)
826f3a39 259{
260 Buffer m;
261 char *banner;
262
44a053a3 263 debug3("%s entering", __func__);
826f3a39 264
265 buffer_init(&m);
266 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
267 buffer_clear(&m);
268
540d72c3 269 mm_request_receive_expect(pmonitor->m_recvfd,
270 MONITOR_ANS_AUTH2_READ_BANNER, &m);
826f3a39 271 banner = buffer_get_string(&m, NULL);
272 buffer_free(&m);
44a053a3 273
540d72c3 274 /* treat empty banner as missing banner */
275 if (strlen(banner) == 0) {
276 xfree(banner);
277 banner = NULL;
278 }
826f3a39 279 return (banner);
280}
281
282/* Inform the privileged process about service and style */
283
284void
285mm_inform_authserv(char *service, char *style)
286{
287 Buffer m;
288
44a053a3 289 debug3("%s entering", __func__);
826f3a39 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 */
301int
302mm_auth_password(Authctxt *authctxt, char *password)
303{
304 Buffer m;
305 int authenticated = 0;
306
44a053a3 307 debug3("%s entering", __func__);
826f3a39 308
309 buffer_init(&m);
310 buffer_put_cstring(&m, password);
311 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
312
44a053a3 313 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
826f3a39 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",
44a053a3 321 __func__, authenticated ? "" : "not ");
826f3a39 322 return (authenticated);
323}
324
325int
326mm_user_key_allowed(struct passwd *pw, Key *key)
327{
328 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
329}
330
331int
332mm_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
338int
339mm_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
350static void
351mm_send_debug(Buffer *m)
352{
353 char *msg;
354
355 while (buffer_len(m)) {
356 msg = buffer_get_string(m, NULL);
44a053a3 357 debug3("%s: Sending debug: %s", __func__, msg);
826f3a39 358 packet_send_debug("%s", msg);
359 xfree(msg);
360 }
361}
362
363int
364mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
365{
366 Buffer m;
367 u_char *blob;
368 u_int len;
bfe49944 369 int allowed = 0, have_forced = 0;
826f3a39 370
44a053a3 371 debug3("%s entering", __func__);
826f3a39 372
373 /* Convert the key to a blob and the pass it over */
374 if (!key_to_blob(key, &blob, &len))
375 return (0);
376
377 buffer_init(&m);
378 buffer_put_int(&m, type);
379 buffer_put_cstring(&m, user ? user : "");
380 buffer_put_cstring(&m, host ? host : "");
381 buffer_put_string(&m, blob, len);
382 xfree(blob);
383
384 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
385
44a053a3 386 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
826f3a39 387 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
388
389 allowed = buffer_get_int(&m);
390
bfe49944 391 /* fake forced command */
392 auth_clear_options();
393 have_forced = buffer_get_int(&m);
394 forced_command = have_forced ? xstrdup("true") : NULL;
395
826f3a39 396 /* Send potential debug messages */
397 mm_send_debug(&m);
398
399 buffer_free(&m);
400
401 return (allowed);
402}
403
404/*
405 * This key verify needs to send the key type along, because the
406 * privileged parent makes the decision if the key is allowed
407 * for authentication.
408 */
409
410int
411mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
412{
413 Buffer m;
414 u_char *blob;
415 u_int len;
416 int verified = 0;
417
44a053a3 418 debug3("%s entering", __func__);
826f3a39 419
420 /* Convert the key to a blob and the pass it over */
421 if (!key_to_blob(key, &blob, &len))
422 return (0);
423
424 buffer_init(&m);
425 buffer_put_string(&m, blob, len);
426 buffer_put_string(&m, sig, siglen);
427 buffer_put_string(&m, data, datalen);
428 xfree(blob);
429
430 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
431
44a053a3 432 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
826f3a39 433 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
434
435 verified = buffer_get_int(&m);
436
437 buffer_free(&m);
438
439 return (verified);
440}
441
442/* Export key state after authentication */
443Newkeys *
444mm_newkeys_from_blob(u_char *blob, int blen)
445{
446 Buffer b;
447 u_int len;
448 Newkeys *newkey = NULL;
449 Enc *enc;
450 Mac *mac;
451 Comp *comp;
452
44a053a3 453 debug3("%s: %p(%d)", __func__, blob, blen);
826f3a39 454#ifdef DEBUG_PK
455 dump_base64(stderr, blob, blen);
456#endif
457 buffer_init(&b);
458 buffer_append(&b, blob, blen);
459
460 newkey = xmalloc(sizeof(*newkey));
461 enc = &newkey->enc;
462 mac = &newkey->mac;
463 comp = &newkey->comp;
464
465 /* Enc structure */
466 enc->name = buffer_get_string(&b, NULL);
467 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
468 enc->enabled = buffer_get_int(&b);
469 enc->block_size = buffer_get_int(&b);
470 enc->key = buffer_get_string(&b, &enc->key_len);
471 enc->iv = buffer_get_string(&b, &len);
472 if (len != enc->block_size)
d03f4262 473 fatal("%s: bad ivlen: expected %u != %u", __func__,
826f3a39 474 enc->block_size, len);
475
476 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
44a053a3 477 fatal("%s: bad cipher name %s or pointer %p", __func__,
826f3a39 478 enc->name, enc->cipher);
479
480 /* Mac structure */
481 mac->name = buffer_get_string(&b, NULL);
fa0f0f45 482 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
483 fatal("%s: can not setup mac %s", __func__, mac->name);
826f3a39 484 mac->enabled = buffer_get_int(&b);
485 mac->key = buffer_get_string(&b, &len);
486 if (len > mac->key_len)
d03f4262 487 fatal("%s: bad mac key length: %u > %d", __func__, len,
826f3a39 488 mac->key_len);
489 mac->key_len = len;
490
491 /* Comp structure */
492 comp->type = buffer_get_int(&b);
493 comp->enabled = buffer_get_int(&b);
494 comp->name = buffer_get_string(&b, NULL);
495
496 len = buffer_len(&b);
497 if (len != 0)
d03f4262 498 error("newkeys_from_blob: remaining bytes in blob %u", len);
826f3a39 499 buffer_free(&b);
500 return (newkey);
501}
502
503int
504mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
505{
506 Buffer b;
507 int len;
826f3a39 508 Enc *enc;
509 Mac *mac;
510 Comp *comp;
b5afdff5 511 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
826f3a39 512
44a053a3 513 debug3("%s: converting %p", __func__, newkey);
826f3a39 514
515 if (newkey == NULL) {
44a053a3 516 error("%s: newkey == NULL", __func__);
826f3a39 517 return 0;
518 }
519 enc = &newkey->enc;
520 mac = &newkey->mac;
521 comp = &newkey->comp;
522
523 buffer_init(&b);
524 /* Enc structure */
525 buffer_put_cstring(&b, enc->name);
526 /* The cipher struct is constant and shared, you export pointer */
527 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
528 buffer_put_int(&b, enc->enabled);
529 buffer_put_int(&b, enc->block_size);
530 buffer_put_string(&b, enc->key, enc->key_len);
531 packet_get_keyiv(mode, enc->iv, enc->block_size);
532 buffer_put_string(&b, enc->iv, enc->block_size);
533
534 /* Mac structure */
535 buffer_put_cstring(&b, mac->name);
536 buffer_put_int(&b, mac->enabled);
537 buffer_put_string(&b, mac->key, mac->key_len);
538
539 /* Comp structure */
540 buffer_put_int(&b, comp->type);
541 buffer_put_int(&b, comp->enabled);
542 buffer_put_cstring(&b, comp->name);
543
544 len = buffer_len(&b);
826f3a39 545 if (lenp != NULL)
546 *lenp = len;
d03f4262 547 if (blobp != NULL) {
548 *blobp = xmalloc(len);
549 memcpy(*blobp, buffer_ptr(&b), len);
550 }
551 memset(buffer_ptr(&b), 0, len);
552 buffer_free(&b);
826f3a39 553 return len;
554}
555
556static void
557mm_send_kex(Buffer *m, Kex *kex)
558{
559 buffer_put_string(m, kex->session_id, kex->session_id_len);
560 buffer_put_int(m, kex->we_need);
561 buffer_put_int(m, kex->hostkey_type);
562 buffer_put_int(m, kex->kex_type);
563 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
564 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
565 buffer_put_int(m, kex->flags);
566 buffer_put_cstring(m, kex->client_version_string);
567 buffer_put_cstring(m, kex->server_version_string);
568}
569
570void
7e82606e 571mm_send_keystate(struct monitor *monitor)
826f3a39 572{
b5afdff5 573 Buffer m, *input, *output;
826f3a39 574 u_char *blob, *p;
575 u_int bloblen, plen;
7cac2b65 576 u_int32_t seqnr, packets;
5156b1a1 577 u_int64_t blocks, bytes;
826f3a39 578
579 buffer_init(&m);
580
581 if (!compat20) {
582 u_char iv[24];
44a053a3 583 u_char *key;
584 u_int ivlen, keylen;
826f3a39 585
586 buffer_put_int(&m, packet_get_protocol_flags());
587
588 buffer_put_int(&m, packet_get_ssh1_cipher());
589
44a053a3 590 debug3("%s: Sending ssh1 KEY+IV", __func__);
591 keylen = packet_get_encryption_key(NULL);
592 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
593 keylen = packet_get_encryption_key(key);
594 buffer_put_string(&m, key, keylen);
595 memset(key, 0, keylen);
596 xfree(key);
597
826f3a39 598 ivlen = packet_get_keyiv_len(MODE_OUT);
599 packet_get_keyiv(MODE_OUT, iv, ivlen);
600 buffer_put_string(&m, iv, ivlen);
601 ivlen = packet_get_keyiv_len(MODE_OUT);
602 packet_get_keyiv(MODE_IN, iv, ivlen);
603 buffer_put_string(&m, iv, ivlen);
604 goto skip;
605 } else {
606 /* Kex for rekeying */
7e82606e 607 mm_send_kex(&m, *monitor->m_pkex);
826f3a39 608 }
609
610 debug3("%s: Sending new keys: %p %p",
b5afdff5 611 __func__, packet_get_newkeys(MODE_OUT),
612 packet_get_newkeys(MODE_IN));
826f3a39 613
614 /* Keys from Kex */
615 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
44a053a3 616 fatal("%s: conversion of newkeys failed", __func__);
826f3a39 617
618 buffer_put_string(&m, blob, bloblen);
619 xfree(blob);
620
621 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
44a053a3 622 fatal("%s: conversion of newkeys failed", __func__);
826f3a39 623
624 buffer_put_string(&m, blob, bloblen);
625 xfree(blob);
626
5156b1a1 627 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
7cac2b65 628 buffer_put_int(&m, seqnr);
629 buffer_put_int64(&m, blocks);
630 buffer_put_int(&m, packets);
5156b1a1 631 buffer_put_int64(&m, bytes);
632 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
7cac2b65 633 buffer_put_int(&m, seqnr);
634 buffer_put_int64(&m, blocks);
635 buffer_put_int(&m, packets);
5156b1a1 636 buffer_put_int64(&m, bytes);
826f3a39 637
44a053a3 638 debug3("%s: New keys have been sent", __func__);
826f3a39 639 skip:
640 /* More key context */
641 plen = packet_get_keycontext(MODE_OUT, NULL);
642 p = xmalloc(plen+1);
643 packet_get_keycontext(MODE_OUT, p);
644 buffer_put_string(&m, p, plen);
645 xfree(p);
646
647 plen = packet_get_keycontext(MODE_IN, NULL);
648 p = xmalloc(plen+1);
649 packet_get_keycontext(MODE_IN, p);
650 buffer_put_string(&m, p, plen);
651 xfree(p);
652
653 /* Compression state */
44a053a3 654 debug3("%s: Sending compression state", __func__);
826f3a39 655 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
656 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
657
658 /* Network I/O buffers */
b5afdff5 659 input = (Buffer *)packet_get_input();
660 output = (Buffer *)packet_get_output();
661 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
662 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
663
664 /* Roaming */
665 if (compat20) {
666 buffer_put_int64(&m, get_sent_bytes());
667 buffer_put_int64(&m, get_recv_bytes());
668 }
826f3a39 669
7e82606e 670 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
44a053a3 671 debug3("%s: Finished sending state", __func__);
826f3a39 672
673 buffer_free(&m);
674}
675
676int
30460aeb 677mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
826f3a39 678{
679 Buffer m;
7e82606e 680 char *p, *msg;
5156b1a1 681 int success = 0, tmp1 = -1, tmp2 = -1;
682
683 /* Kludge: ensure there are fds free to receive the pty/tty */
684 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
685 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
686 error("%s: cannot allocate fds for pty", __func__);
687 if (tmp1 > 0)
688 close(tmp1);
689 if (tmp2 > 0)
690 close(tmp2);
691 return 0;
692 }
693 close(tmp1);
694 close(tmp2);
826f3a39 695
696 buffer_init(&m);
697 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
698
44a053a3 699 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
826f3a39 700 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
701
702 success = buffer_get_int(&m);
703 if (success == 0) {
44a053a3 704 debug3("%s: pty alloc failed", __func__);
826f3a39 705 buffer_free(&m);
706 return (0);
707 }
708 p = buffer_get_string(&m, NULL);
7e82606e 709 msg = buffer_get_string(&m, NULL);
826f3a39 710 buffer_free(&m);
711
712 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
713 xfree(p);
714
7e82606e 715 buffer_append(&loginmsg, msg, strlen(msg));
716 xfree(msg);
717
e74dc197 718 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
719 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
720 fatal("%s: receive fds failed", __func__);
826f3a39 721
722 /* Success */
723 return (1);
724}
725
726void
540d72c3 727mm_session_pty_cleanup2(Session *s)
826f3a39 728{
826f3a39 729 Buffer m;
730
731 if (s->ttyfd == -1)
732 return;
733 buffer_init(&m);
734 buffer_put_cstring(&m, s->tty);
735 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
736 buffer_free(&m);
737
738 /* closed dup'ed master */
5156b1a1 739 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
740 error("close(s->ptymaster/%d): %s",
741 s->ptymaster, strerror(errno));
826f3a39 742
743 /* unlink pty from session */
744 s->ttyfd = -1;
745}
746
747#ifdef USE_PAM
748void
12a403af 749mm_start_pam(Authctxt *authctxt)
826f3a39 750{
751 Buffer m;
752
44a053a3 753 debug3("%s entering", __func__);
7cac2b65 754 if (!options.use_pam)
755 fatal("UsePAM=no, but ended up in %s anyway", __func__);
826f3a39 756
757 buffer_init(&m);
826f3a39 758 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
759
760 buffer_free(&m);
761}
7cac2b65 762
763u_int
764mm_do_pam_account(void)
765{
766 Buffer m;
767 u_int ret;
dfddba3d 768 char *msg;
7cac2b65 769
770 debug3("%s entering", __func__);
771 if (!options.use_pam)
772 fatal("UsePAM=no, but ended up in %s anyway", __func__);
773
774 buffer_init(&m);
775 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
776
540d72c3 777 mm_request_receive_expect(pmonitor->m_recvfd,
7cac2b65 778 MONITOR_ANS_PAM_ACCOUNT, &m);
779 ret = buffer_get_int(&m);
dfddba3d 780 msg = buffer_get_string(&m, NULL);
781 buffer_append(&loginmsg, msg, strlen(msg));
782 xfree(msg);
7cac2b65 783
784 buffer_free(&m);
540d72c3 785
7cac2b65 786 debug3("%s returning %d", __func__, ret);
787
788 return (ret);
789}
790
791void *
792mm_sshpam_init_ctx(Authctxt *authctxt)
793{
794 Buffer m;
795 int success;
796
797 debug3("%s", __func__);
798 buffer_init(&m);
799 buffer_put_cstring(&m, authctxt->user);
800 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
801 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
802 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
803 success = buffer_get_int(&m);
804 if (success == 0) {
805 debug3("%s: pam_init_ctx failed", __func__);
806 buffer_free(&m);
807 return (NULL);
808 }
809 buffer_free(&m);
810 return (authctxt);
811}
812
813int
814mm_sshpam_query(void *ctx, char **name, char **info,
815 u_int *num, char ***prompts, u_int **echo_on)
816{
817 Buffer m;
2ce0bfe4 818 u_int i;
819 int ret;
7cac2b65 820
821 debug3("%s", __func__);
822 buffer_init(&m);
823 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
824 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
825 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
826 ret = buffer_get_int(&m);
827 debug3("%s: pam_query returned %d", __func__, ret);
828 *name = buffer_get_string(&m, NULL);
829 *info = buffer_get_string(&m, NULL);
830 *num = buffer_get_int(&m);
30460aeb 831 if (*num > PAM_MAX_NUM_MSG)
832 fatal("%s: recieved %u PAM messages, expected <= %u",
833 __func__, *num, PAM_MAX_NUM_MSG);
834 *prompts = xcalloc((*num + 1), sizeof(char *));
835 *echo_on = xcalloc((*num + 1), sizeof(u_int));
7cac2b65 836 for (i = 0; i < *num; ++i) {
837 (*prompts)[i] = buffer_get_string(&m, NULL);
838 (*echo_on)[i] = buffer_get_int(&m);
839 }
840 buffer_free(&m);
841 return (ret);
842}
843
844int
845mm_sshpam_respond(void *ctx, u_int num, char **resp)
846{
847 Buffer m;
2ce0bfe4 848 u_int i;
849 int ret;
7cac2b65 850
851 debug3("%s", __func__);
852 buffer_init(&m);
853 buffer_put_int(&m, num);
854 for (i = 0; i < num; ++i)
855 buffer_put_cstring(&m, resp[i]);
856 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
857 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
858 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
859 ret = buffer_get_int(&m);
860 debug3("%s: pam_respond returned %d", __func__, ret);
861 buffer_free(&m);
862 return (ret);
863}
864
865void
866mm_sshpam_free_ctx(void *ctxtp)
867{
868 Buffer m;
869
870 debug3("%s", __func__);
871 buffer_init(&m);
872 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
873 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
874 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
875 buffer_free(&m);
876}
826f3a39 877#endif /* USE_PAM */
878
879/* Request process termination */
880
881void
882mm_terminate(void)
883{
884 Buffer m;
885
886 buffer_init(&m);
887 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
888 buffer_free(&m);
889}
890
891int
892mm_ssh1_session_key(BIGNUM *num)
893{
894 int rsafail;
895 Buffer m;
896
897 buffer_init(&m);
898 buffer_put_bignum2(&m, num);
899 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
900
901 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
902
903 rsafail = buffer_get_int(&m);
904 buffer_get_bignum2(&m, num);
905
906 buffer_free(&m);
907
908 return (rsafail);
909}
910
911static void
912mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
913 char ***prompts, u_int **echo_on)
914{
44a053a3 915 *name = xstrdup("");
916 *infotxt = xstrdup("");
826f3a39 917 *numprompts = 1;
30460aeb 918 *prompts = xcalloc(*numprompts, sizeof(char *));
919 *echo_on = xcalloc(*numprompts, sizeof(u_int));
826f3a39 920 (*echo_on)[0] = 0;
921}
922
923int
924mm_bsdauth_query(void *ctx, char **name, char **infotxt,
925 u_int *numprompts, char ***prompts, u_int **echo_on)
926{
927 Buffer m;
bfe49944 928 u_int success;
826f3a39 929 char *challenge;
930
44a053a3 931 debug3("%s: entering", __func__);
826f3a39 932
933 buffer_init(&m);
934 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
935
936 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
937 &m);
bfe49944 938 success = buffer_get_int(&m);
939 if (success == 0) {
44a053a3 940 debug3("%s: no challenge", __func__);
826f3a39 941 buffer_free(&m);
942 return (-1);
943 }
944
945 /* Get the challenge, and format the response */
946 challenge = buffer_get_string(&m, NULL);
947 buffer_free(&m);
948
949 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
950 (*prompts)[0] = challenge;
951
44a053a3 952 debug3("%s: received challenge: %s", __func__, challenge);
826f3a39 953
954 return (0);
955}
956
957int
958mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
959{
960 Buffer m;
961 int authok;
962
44a053a3 963 debug3("%s: entering", __func__);
826f3a39 964 if (numresponses != 1)
965 return (-1);
966
967 buffer_init(&m);
968 buffer_put_cstring(&m, responses[0]);
969 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
970
971 mm_request_receive_expect(pmonitor->m_recvfd,
972 MONITOR_ANS_BSDAUTHRESPOND, &m);
973
974 authok = buffer_get_int(&m);
975 buffer_free(&m);
976
977 return ((authok == 0) ? -1 : 0);
978}
979
7e82606e 980#ifdef SKEY
826f3a39 981int
982mm_skey_query(void *ctx, char **name, char **infotxt,
983 u_int *numprompts, char ***prompts, u_int **echo_on)
984{
985 Buffer m;
bfe49944 986 u_int success;
30460aeb 987 char *challenge;
826f3a39 988
44a053a3 989 debug3("%s: entering", __func__);
826f3a39 990
991 buffer_init(&m);
992 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
993
994 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
995 &m);
bfe49944 996 success = buffer_get_int(&m);
997 if (success == 0) {
44a053a3 998 debug3("%s: no challenge", __func__);
826f3a39 999 buffer_free(&m);
1000 return (-1);
1001 }
1002
1003 /* Get the challenge, and format the response */
1004 challenge = buffer_get_string(&m, NULL);
1005 buffer_free(&m);
1006
44a053a3 1007 debug3("%s: received challenge: %s", __func__, challenge);
826f3a39 1008
1009 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1010
30460aeb 1011 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
826f3a39 1012 xfree(challenge);
1013
1014 return (0);
1015}
1016
1017int
1018mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1019{
1020 Buffer m;
1021 int authok;
1022
44a053a3 1023 debug3("%s: entering", __func__);
826f3a39 1024 if (numresponses != 1)
1025 return (-1);
1026
1027 buffer_init(&m);
1028 buffer_put_cstring(&m, responses[0]);
1029 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1030
1031 mm_request_receive_expect(pmonitor->m_recvfd,
1032 MONITOR_ANS_SKEYRESPOND, &m);
1033
1034 authok = buffer_get_int(&m);
1035 buffer_free(&m);
1036
1037 return ((authok == 0) ? -1 : 0);
1038}
7e82606e 1039#endif /* SKEY */
826f3a39 1040
1041void
1042mm_ssh1_session_id(u_char session_id[16])
1043{
1044 Buffer m;
1045 int i;
1046
44a053a3 1047 debug3("%s entering", __func__);
826f3a39 1048
1049 buffer_init(&m);
1050 for (i = 0; i < 16; i++)
1051 buffer_put_char(&m, session_id[i]);
1052
1053 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1054 buffer_free(&m);
1055}
1056
1057int
1058mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1059{
1060 Buffer m;
1061 Key *key;
1062 u_char *blob;
1063 u_int blen;
bfe49944 1064 int allowed = 0, have_forced = 0;
826f3a39 1065
44a053a3 1066 debug3("%s entering", __func__);
826f3a39 1067
1068 buffer_init(&m);
1069 buffer_put_bignum2(&m, client_n);
1070
1071 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1072 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1073
1074 allowed = buffer_get_int(&m);
1075
bfe49944 1076 /* fake forced command */
1077 auth_clear_options();
1078 have_forced = buffer_get_int(&m);
1079 forced_command = have_forced ? xstrdup("true") : NULL;
1080
826f3a39 1081 if (allowed && rkey != NULL) {
1082 blob = buffer_get_string(&m, &blen);
1083 if ((key = key_from_blob(blob, blen)) == NULL)
44a053a3 1084 fatal("%s: key_from_blob failed", __func__);
826f3a39 1085 *rkey = key;
1086 xfree(blob);
1087 }
1088 mm_send_debug(&m);
1089 buffer_free(&m);
1090
1091 return (allowed);
1092}
1093
1094BIGNUM *
1095mm_auth_rsa_generate_challenge(Key *key)
1096{
1097 Buffer m;
1098 BIGNUM *challenge;
1099 u_char *blob;
1100 u_int blen;
1101
44a053a3 1102 debug3("%s entering", __func__);
826f3a39 1103
1104 if ((challenge = BN_new()) == NULL)
44a053a3 1105 fatal("%s: BN_new failed", __func__);
826f3a39 1106
1107 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1108 if (key_to_blob(key, &blob, &blen) == 0)
44a053a3 1109 fatal("%s: key_to_blob failed", __func__);
826f3a39 1110 key->type = KEY_RSA1;
1111
1112 buffer_init(&m);
1113 buffer_put_string(&m, blob, blen);
1114 xfree(blob);
1115
1116 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1117 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1118
1119 buffer_get_bignum2(&m, challenge);
1120 buffer_free(&m);
1121
1122 return (challenge);
1123}
1124
1125int
1126mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1127{
1128 Buffer m;
1129 u_char *blob;
1130 u_int blen;
1131 int success = 0;
1132
44a053a3 1133 debug3("%s entering", __func__);
826f3a39 1134
1135 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1136 if (key_to_blob(key, &blob, &blen) == 0)
44a053a3 1137 fatal("%s: key_to_blob failed", __func__);
826f3a39 1138 key->type = KEY_RSA1;
1139
1140 buffer_init(&m);
1141 buffer_put_string(&m, blob, blen);
1142 buffer_put_string(&m, response, 16);
1143 xfree(blob);
1144
1145 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1146 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1147
1148 success = buffer_get_int(&m);
1149 buffer_free(&m);
1150
1151 return (success);
1152}
23987cb8 1153
dfddba3d 1154#ifdef SSH_AUDIT_EVENTS
1155void
1156mm_audit_event(ssh_audit_event_t event)
1157{
1158 Buffer m;
1159
1160 debug3("%s entering", __func__);
1161
1162 buffer_init(&m);
1163 buffer_put_int(&m, event);
1164
1165 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1166 buffer_free(&m);
1167}
1168
1169void
1170mm_audit_run_command(const char *command)
1171{
1172 Buffer m;
1173
1174 debug3("%s entering command %s", __func__, command);
1175
1176 buffer_init(&m);
1177 buffer_put_cstring(&m, command);
1178
1179 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1180 buffer_free(&m);
1181}
1182#endif /* SSH_AUDIT_EVENTS */
1183
7cac2b65 1184#ifdef GSSAPI
1185OM_uint32
7e82606e 1186mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
23987cb8 1187{
7cac2b65 1188 Buffer m;
1189 OM_uint32 major;
23987cb8 1190
7cac2b65 1191 /* Client doesn't get to see the context */
1192 *ctx = NULL;
23987cb8 1193
1194 buffer_init(&m);
7e82606e 1195 buffer_put_string(&m, goid->elements, goid->length);
23987cb8 1196
7cac2b65 1197 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1198 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1199
1200 major = buffer_get_int(&m);
23987cb8 1201
23987cb8 1202 buffer_free(&m);
7cac2b65 1203 return (major);
23987cb8 1204}
23987cb8 1205
7cac2b65 1206OM_uint32
1207mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1208 gss_buffer_desc *out, OM_uint32 *flags)
23987cb8 1209{
23987cb8 1210 Buffer m;
7cac2b65 1211 OM_uint32 major;
1212 u_int len;
23987cb8 1213
1214 buffer_init(&m);
7cac2b65 1215 buffer_put_string(&m, in->value, in->length);
23987cb8 1216
7cac2b65 1217 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1218 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
23987cb8 1219
7cac2b65 1220 major = buffer_get_int(&m);
1221 out->value = buffer_get_string(&m, &len);
1222 out->length = len;
1223 if (flags)
1224 *flags = buffer_get_int(&m);
23987cb8 1225
1226 buffer_free(&m);
b59afbfe 1227
7cac2b65 1228 return (major);
b59afbfe 1229}
1230
540d72c3 1231OM_uint32
1232mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1233{
1234 Buffer m;
1235 OM_uint32 major;
1236
1237 buffer_init(&m);
1238 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1239 buffer_put_string(&m, gssmic->value, gssmic->length);
1240
1241 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1242 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1243 &m);
1244
1245 major = buffer_get_int(&m);
1246 buffer_free(&m);
1247 return(major);
1248}
1249
7cac2b65 1250int
f97edba6 1251mm_ssh_gssapi_userok(char *user, struct passwd *pw)
7cac2b65 1252{
1253 Buffer m;
1254 int authenticated = 0;
b59afbfe 1255
7cac2b65 1256 buffer_init(&m);
b59afbfe 1257
7cac2b65 1258 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1259 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1260 &m);
b59afbfe 1261
7cac2b65 1262 authenticated = buffer_get_int(&m);
b59afbfe 1263
23987cb8 1264 buffer_free(&m);
7cac2b65 1265 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1266 return (authenticated);
b59afbfe 1267}
1268
23987cb8 1269char *
1270mm_ssh_gssapi_last_error(Gssctxt *ctx, OM_uint32 *major, OM_uint32 *minor) {
1271 Buffer m;
1272 OM_uint32 maj,min;
1273 char *errstr;
1274
1275 buffer_init(&m);
1276
1277 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSERR, &m);
1278 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSERR, &m);
1279
1280 maj = buffer_get_int(&m);
1281 min = buffer_get_int(&m);
1282
1283 if (major) *major=maj;
1284 if (minor) *minor=min;
1285
1286 errstr=buffer_get_string(&m,NULL);
1287
1288 buffer_free(&m);
1289
1290 return(errstr);
1291}
e23e524c 1292
9eeaa28e 1293OM_uint32
1294mm_gss_indicate_mechs(OM_uint32 *minor_status, gss_OID_set *mech_set)
1295{
1296 Buffer m;
e23e524c 1297 OM_uint32 major,minor;
1298 int count;
1299 gss_OID_desc oid;
d7590ddf 1300 u_int length;
1301
9eeaa28e 1302 buffer_init(&m);
1303
1304 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSMECHS, &m);
9eeaa28e 1305 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSMECHS,
1306 &m);
1307 major=buffer_get_int(&m);
17a7ea48 1308 count=buffer_get_int(&m);
e23e524c 1309
1310 gss_create_empty_oid_set(&minor,mech_set);
1311 while(count-->0) {
e23e524c 1312 oid.elements=buffer_get_string(&m,&length);
1313 oid.length=length;
1314 gss_add_oid_set_member(&minor,&oid,mech_set);
9eeaa28e 1315 }
1316
23987cb8 1317 buffer_free(&m);
9eeaa28e 1318
23987cb8 1319 return(major);
9eeaa28e 1320}
e23e524c 1321
1322int
1323mm_ssh_gssapi_localname(char **lname)
1324{
1325 Buffer m;
1326
1327 buffer_init(&m);
1328 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSLOCALNAME, &m);
1329
1330 debug3("%s: waiting for MONITOR_ANS_GSSLOCALNAME", __func__);
1331 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSLOCALNAME,
1332 &m);
1333
1334 *lname = buffer_get_string(&m, NULL);
1335
1336 buffer_free(&m);
1337 if (lname[0] == '\0') {
1338 debug3("%s: gssapi identity mapping failed", __func__);
1339 } else {
1340 debug3("%s: gssapi identity mapped to %s", __func__, *lname);
1341 }
1342
1343 return(0);
1344}
fe4ad273 1345
f97edba6 1346OM_uint32
1347mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash)
1348{
1349 Buffer m;
1350 OM_uint32 major;
1351 u_int len;
1352
1353 buffer_init(&m);
1354 buffer_put_string(&m, data->value, data->length);
1355
1356 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m);
1357 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m);
1358
1359 major = buffer_get_int(&m);
1360 hash->value = buffer_get_string(&m, &len);
1361 hash->length = len;
1362
1363 buffer_free(&m);
1364
1365 return(major);
1366}
1367
1368int
1369mm_ssh_gssapi_update_creds(ssh_gssapi_ccache *store)
1370{
1371 Buffer m;
1372 int ok;
1373
1374 buffer_init(&m);
1375
1376 buffer_put_cstring(&m, store->filename ? store->filename : "");
1377 buffer_put_cstring(&m, store->envvar ? store->envvar : "");
1378 buffer_put_cstring(&m, store->envval ? store->envval : "");
1379
1380 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUPCREDS, &m);
1381 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUPCREDS, &m);
1382
1383 ok = buffer_get_int(&m);
1384
1385 buffer_free(&m);
1386
1387 return (ok);
1388}
1389
b59afbfe 1390#endif /* GSSAPI */
5262cbfb 1391
1392#ifdef JPAKE
1393void
1394mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1395 char **hash_scheme, char **salt)
1396{
1397 Buffer m;
1398
1399 debug3("%s entering", __func__);
1400
1401 buffer_init(&m);
1402 mm_request_send(pmonitor->m_recvfd,
1403 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1404
1405 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1406 mm_request_receive_expect(pmonitor->m_recvfd,
1407 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1408
1409 *hash_scheme = buffer_get_string(&m, NULL);
1410 *salt = buffer_get_string(&m, NULL);
1411
1412 buffer_free(&m);
1413}
1414
1415void
b5afdff5 1416mm_jpake_step1(struct modp_group *grp,
5262cbfb 1417 u_char **id, u_int *id_len,
1418 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1419 u_char **priv1_proof, u_int *priv1_proof_len,
1420 u_char **priv2_proof, u_int *priv2_proof_len)
1421{
1422 Buffer m;
1423
1424 debug3("%s entering", __func__);
1425
1426 buffer_init(&m);
1427 mm_request_send(pmonitor->m_recvfd,
1428 MONITOR_REQ_JPAKE_STEP1, &m);
1429
1430 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1431 mm_request_receive_expect(pmonitor->m_recvfd,
1432 MONITOR_ANS_JPAKE_STEP1, &m);
1433
1434 if ((*priv1 = BN_new()) == NULL ||
1435 (*priv2 = BN_new()) == NULL ||
1436 (*g_priv1 = BN_new()) == NULL ||
1437 (*g_priv2 = BN_new()) == NULL)
1438 fatal("%s: BN_new", __func__);
1439
1440 *id = buffer_get_string(&m, id_len);
1441 /* priv1 and priv2 are, well, private */
1442 buffer_get_bignum2(&m, *g_priv1);
1443 buffer_get_bignum2(&m, *g_priv2);
1444 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1445 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1446
1447 buffer_free(&m);
1448}
1449
1450void
b5afdff5 1451mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
5262cbfb 1452 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1453 const u_char *theirid, u_int theirid_len,
1454 const u_char *myid, u_int myid_len,
1455 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1456 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1457 BIGNUM **newpub,
1458 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1459{
1460 Buffer m;
1461
1462 debug3("%s entering", __func__);
1463
1464 buffer_init(&m);
1465 /* monitor already has all bignums except theirpub1, theirpub2 */
1466 buffer_put_bignum2(&m, theirpub1);
1467 buffer_put_bignum2(&m, theirpub2);
1468 /* monitor already knows our id */
1469 buffer_put_string(&m, theirid, theirid_len);
1470 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1471 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1472
1473 mm_request_send(pmonitor->m_recvfd,
1474 MONITOR_REQ_JPAKE_STEP2, &m);
1475
1476 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1477 mm_request_receive_expect(pmonitor->m_recvfd,
1478 MONITOR_ANS_JPAKE_STEP2, &m);
1479
1480 if ((*newpub = BN_new()) == NULL)
1481 fatal("%s: BN_new", __func__);
1482
1483 buffer_get_bignum2(&m, *newpub);
1484 *newpub_exponent_proof = buffer_get_string(&m,
1485 newpub_exponent_proof_len);
1486
1487 buffer_free(&m);
1488}
1489
1490void
b5afdff5 1491mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
5262cbfb 1492 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1493 BIGNUM *theirpub1, BIGNUM *theirpub2,
1494 const u_char *my_id, u_int my_id_len,
1495 const u_char *their_id, u_int their_id_len,
1496 const u_char *sess_id, u_int sess_id_len,
1497 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1498 BIGNUM **k,
1499 u_char **confirm_hash, u_int *confirm_hash_len)
1500{
1501 Buffer m;
1502
1503 debug3("%s entering", __func__);
1504
1505 buffer_init(&m);
1506 /* monitor already has all bignums except step2_val */
1507 buffer_put_bignum2(&m, step2_val);
1508 /* monitor already knows all the ids */
1509 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1510
1511 mm_request_send(pmonitor->m_recvfd,
1512 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1513
1514 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1515 mm_request_receive_expect(pmonitor->m_recvfd,
1516 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1517
1518 /* 'k' is sensitive and stays in the monitor */
1519 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1520
1521 buffer_free(&m);
1522}
1523
1524int
1525mm_jpake_check_confirm(const BIGNUM *k,
1526 const u_char *peer_id, u_int peer_id_len,
1527 const u_char *sess_id, u_int sess_id_len,
1528 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1529{
1530 Buffer m;
1531 int success = 0;
1532
1533 debug3("%s entering", __func__);
1534
1535 buffer_init(&m);
1536 /* k is dummy in slave, ignored */
1537 /* monitor knows all the ids */
1538 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1539 mm_request_send(pmonitor->m_recvfd,
1540 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1541
1542 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1543 mm_request_receive_expect(pmonitor->m_recvfd,
1544 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1545
1546 success = buffer_get_int(&m);
1547 buffer_free(&m);
1548
1549 debug3("%s: success = %d", __func__, success);
1550 return success;
1551}
1552#endif /* JPAKE */
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