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[openssh-git.git] / monitor_wrap.c
blobb8e8710f71f11d9221f78c0a144f36a4f61a007f
1 /* $OpenBSD: monitor_wrap.c,v 1.68 2009/06/22 05:39:28 dtucker Exp $ */
2 /*
3 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
4 * Copyright 2002 Markus Friedl <markus@openbsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "includes.h"
29
30 #include <sys/types.h>
31 #include <sys/uio.h>
32
33 #include <errno.h>
34 #include <pwd.h>
35 #include <signal.h>
36 #include <stdarg.h>
37 #include <stdio.h>
38 #include <string.h>
39 #include <unistd.h>
40
41 #include <openssl/bn.h>
42 #include <openssl/dh.h>
43 #include <openssl/evp.h>
44
45 #include "openbsd-compat/sys-queue.h"
46 #include "xmalloc.h"
47 #include "ssh.h"
48 #include "dh.h"
49 #include "buffer.h"
50 #include "key.h"
51 #include "cipher.h"
52 #include "kex.h"
53 #include "hostfile.h"
54 #include "auth.h"
55 #include "auth-options.h"
56 #include "packet.h"
57 #include "mac.h"
58 #include "log.h"
59 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
60 #undef TARGET_OS_MAC
61 #include "zlib.h"
62 #define TARGET_OS_MAC 1
63 #else
64 #include "zlib.h"
65 #endif
66 #include "monitor.h"
67 #ifdef GSSAPI
68 #include "ssh-gss.h"
69 #endif
70 #include "monitor_wrap.h"
71 #include "atomicio.h"
72 #include "monitor_fdpass.h"
73 #include "misc.h"
74 #include "schnorr.h"
75 #include "jpake.h"
76
77 #include "channels.h"
78 #include "session.h"
79 #include "servconf.h"
80 #include "roaming.h"
81
82 /* Imports */
83 extern int compat20;
84 extern z_stream incoming_stream;
85 extern z_stream outgoing_stream;
86 extern struct monitor *pmonitor;
87 extern Buffer loginmsg;
88 extern ServerOptions options;
89
90 int
91 mm_is_monitor(void)
92 {
93 /*
94 * m_pid is only set in the privileged part, and
95 * points to the unprivileged child.
96 */
97 return (pmonitor && pmonitor->m_pid > 0);
98 }
99
100 void
101 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
102 {
103 u_int mlen = buffer_len(m);
104 u_char buf[5];
105
106 debug3("%s entering: type %d", __func__, type);
107
108 put_u32(buf, mlen + 1);
109 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
110 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
111 fatal("%s: write: %s", __func__, strerror(errno));
112 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
113 fatal("%s: write: %s", __func__, strerror(errno));
114 }
115
116 void
117 mm_request_receive(int sock, Buffer *m)
118 {
119 u_char buf[4];
120 u_int msg_len;
121
122 debug3("%s entering", __func__);
123
124 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
125 if (errno == EPIPE)
126 cleanup_exit(255);
127 fatal("%s: read: %s", __func__, strerror(errno));
128 }
129 msg_len = get_u32(buf);
130 if (msg_len > 256 * 1024)
131 fatal("%s: read: bad msg_len %d", __func__, msg_len);
132 buffer_clear(m);
133 buffer_append_space(m, msg_len);
134 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
135 fatal("%s: read: %s", __func__, strerror(errno));
136 }
137
138 void
139 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
140 {
141 u_char rtype;
142
143 debug3("%s entering: type %d", __func__, type);
144
145 mm_request_receive(sock, m);
146 rtype = buffer_get_char(m);
147 if (rtype != type)
148 fatal("%s: read: rtype %d != type %d", __func__,
149 rtype, type);
150 }
151
152 DH *
153 mm_choose_dh(int min, int nbits, int max)
154 {
155 BIGNUM *p, *g;
156 int success = 0;
157 Buffer m;
158
159 buffer_init(&m);
160 buffer_put_int(&m, min);
161 buffer_put_int(&m, nbits);
162 buffer_put_int(&m, max);
163
164 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
165
166 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
167 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
168
169 success = buffer_get_char(&m);
170 if (success == 0)
171 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
172
173 if ((p = BN_new()) == NULL)
174 fatal("%s: BN_new failed", __func__);
175 if ((g = BN_new()) == NULL)
176 fatal("%s: BN_new failed", __func__);
177 buffer_get_bignum2(&m, p);
178 buffer_get_bignum2(&m, g);
179
180 debug3("%s: remaining %d", __func__, buffer_len(&m));
181 buffer_free(&m);
182
183 return (dh_new_group(g, p));
184 }
185
186 int
187 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
188 {
189 Kex *kex = *pmonitor->m_pkex;
190 Buffer m;
191
192 debug3("%s entering", __func__);
193
194 buffer_init(&m);
195 buffer_put_int(&m, kex->host_key_index(key));
196 buffer_put_string(&m, data, datalen);
197
198 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
199
200 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
201 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
202 *sigp = buffer_get_string(&m, lenp);
203 buffer_free(&m);
204
205 return (0);
206 }
207
208 struct passwd *
209 mm_getpwnamallow(const char *username)
210 {
211 Buffer m;
212 struct passwd *pw;
213 u_int len;
214 ServerOptions *newopts;
215
216 debug3("%s entering", __func__);
217
218 buffer_init(&m);
219 buffer_put_cstring(&m, username);
220
221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
222
223 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
224 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
225
226 if (buffer_get_char(&m) == 0) {
227 pw = NULL;
228 goto out;
229 }
230 pw = buffer_get_string(&m, &len);
231 if (len != sizeof(struct passwd))
232 fatal("%s: struct passwd size mismatch", __func__);
233 pw->pw_name = buffer_get_string(&m, NULL);
234 pw->pw_passwd = buffer_get_string(&m, NULL);
235 pw->pw_gecos = buffer_get_string(&m, NULL);
236 #ifdef HAVE_PW_CLASS_IN_PASSWD
237 pw->pw_class = buffer_get_string(&m, NULL);
238 #endif
239 pw->pw_dir = buffer_get_string(&m, NULL);
240 pw->pw_shell = buffer_get_string(&m, NULL);
241
242 out:
243 /* copy options block as a Match directive may have changed some */
244 newopts = buffer_get_string(&m, &len);
245 if (len != sizeof(*newopts))
246 fatal("%s: option block size mismatch", __func__);
247 if (newopts->banner != NULL)
248 newopts->banner = buffer_get_string(&m, NULL);
249 copy_set_server_options(&options, newopts, 1);
250 xfree(newopts);
251
252 buffer_free(&m);
253
254 return (pw);
255 }
256
257 char *
258 mm_auth2_read_banner(void)
259 {
260 Buffer m;
261 char *banner;
262
263 debug3("%s entering", __func__);
264
265 buffer_init(&m);
266 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
267 buffer_clear(&m);
268
269 mm_request_receive_expect(pmonitor->m_recvfd,
270 MONITOR_ANS_AUTH2_READ_BANNER, &m);
271 banner = buffer_get_string(&m, NULL);
272 buffer_free(&m);
273
274 /* treat empty banner as missing banner */
275 if (strlen(banner) == 0) {
276 xfree(banner);
277 banner = NULL;
278 }
279 return (banner);
280 }
281
282 /* Inform the privileged process about service and style */
283
284 void
285 mm_inform_authserv(char *service, char *style)
286 {
287 Buffer m;
288
289 debug3("%s entering", __func__);
290
291 buffer_init(&m);
292 buffer_put_cstring(&m, service);
293 buffer_put_cstring(&m, style ? style : "");
294
295 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
296
297 buffer_free(&m);
298 }
299
300 /* Do the password authentication */
301 int
302 mm_auth_password(Authctxt *authctxt, char *password)
303 {
304 Buffer m;
305 int authenticated = 0;
306
307 debug3("%s entering", __func__);
308
309 buffer_init(&m);
310 buffer_put_cstring(&m, password);
311 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
312
313 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
314 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
315
316 authenticated = buffer_get_int(&m);
317
318 buffer_free(&m);
319
320 debug3("%s: user %sauthenticated",
321 __func__, authenticated ? "" : "not ");
322 return (authenticated);
323 }
324
325 int
326 mm_user_key_allowed(struct passwd *pw, Key *key)
327 {
328 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
329 }
330
331 int
332 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
333 Key *key)
334 {
335 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
336 }
337
338 int
339 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
340 char *host, Key *key)
341 {
342 int ret;
343
344 key->type = KEY_RSA; /* XXX hack for key_to_blob */
345 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
346 key->type = KEY_RSA1;
347 return (ret);
348 }
349
350 static void
351 mm_send_debug(Buffer *m)
352 {
353 char *msg;
354
355 while (buffer_len(m)) {
356 msg = buffer_get_string(m, NULL);
357 debug3("%s: Sending debug: %s", __func__, msg);
358 packet_send_debug("%s", msg);
359 xfree(msg);
360 }
361 }
362
363 int
364 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
365 {
366 Buffer m;
367 u_char *blob;
368 u_int len;
369 int allowed = 0, have_forced = 0;
370
371 debug3("%s entering", __func__);
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
386 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
387 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
388
389 allowed = buffer_get_int(&m);
390
391 /* fake forced command */
392 auth_clear_options();
393 have_forced = buffer_get_int(&m);
394 forced_command = have_forced ? xstrdup("true") : NULL;
395
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
410 int
411 mm_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
418 debug3("%s entering", __func__);
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
432 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
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 */
443 Newkeys *
444 mm_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
453 debug3("%s: %p(%d)", __func__, blob, blen);
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)
473 fatal("%s: bad ivlen: expected %u != %u", __func__,
474 enc->block_size, len);
475
476 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
477 fatal("%s: bad cipher name %s or pointer %p", __func__,
478 enc->name, enc->cipher);
479
480 /* Mac structure */
481 mac->name = buffer_get_string(&b, NULL);
482 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
483 fatal("%s: can not setup mac %s", __func__, mac->name);
484 mac->enabled = buffer_get_int(&b);
485 mac->key = buffer_get_string(&b, &len);
486 if (len > mac->key_len)
487 fatal("%s: bad mac key length: %u > %d", __func__, len,
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)
498 error("newkeys_from_blob: remaining bytes in blob %u", len);
499 buffer_free(&b);
500 return (newkey);
501 }
502
503 int
504 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
505 {
506 Buffer b;
507 int len;
508 Enc *enc;
509 Mac *mac;
510 Comp *comp;
511 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
512
513 debug3("%s: converting %p", __func__, newkey);
514
515 if (newkey == NULL) {
516 error("%s: newkey == NULL", __func__);
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);
545 if (lenp != NULL)
546 *lenp = len;
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);
553 return len;
554 }
555
556 static void
557 mm_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
570 void
571 mm_send_keystate(struct monitor *monitor)
572 {
573 Buffer m, *input, *output;
574 u_char *blob, *p;
575 u_int bloblen, plen;
576 u_int32_t seqnr, packets;
577 u_int64_t blocks, bytes;
578
579 buffer_init(&m);
580
581 if (!compat20) {
582 u_char iv[24];
583 u_char *key;
584 u_int ivlen, keylen;
585
586 buffer_put_int(&m, packet_get_protocol_flags());
587
588 buffer_put_int(&m, packet_get_ssh1_cipher());
589
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
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 */
607 mm_send_kex(&m, *monitor->m_pkex);
608 }
609
610 debug3("%s: Sending new keys: %p %p",
611 __func__, packet_get_newkeys(MODE_OUT),
612 packet_get_newkeys(MODE_IN));
613
614 /* Keys from Kex */
615 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
616 fatal("%s: conversion of newkeys failed", __func__);
617
618 buffer_put_string(&m, blob, bloblen);
619 xfree(blob);
620
621 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
622 fatal("%s: conversion of newkeys failed", __func__);
623
624 buffer_put_string(&m, blob, bloblen);
625 xfree(blob);
626
627 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
628 buffer_put_int(&m, seqnr);
629 buffer_put_int64(&m, blocks);
630 buffer_put_int(&m, packets);
631 buffer_put_int64(&m, bytes);
632 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
633 buffer_put_int(&m, seqnr);
634 buffer_put_int64(&m, blocks);
635 buffer_put_int(&m, packets);
636 buffer_put_int64(&m, bytes);
637
638 debug3("%s: New keys have been sent", __func__);
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 */
654 debug3("%s: Sending compression state", __func__);
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 */
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 }
669
670 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
671 debug3("%s: Finished sending state", __func__);
672
673 buffer_free(&m);
674 }
675
676 int
677 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
678 {
679 Buffer m;
680 char *p, *msg;
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);
695
696 buffer_init(&m);
697 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
698
699 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
700 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
701
702 success = buffer_get_int(&m);
703 if (success == 0) {
704 debug3("%s: pty alloc failed", __func__);
705 buffer_free(&m);
706 return (0);
707 }
708 p = buffer_get_string(&m, NULL);
709 msg = buffer_get_string(&m, NULL);
710 buffer_free(&m);
711
712 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
713 xfree(p);
714
715 buffer_append(&loginmsg, msg, strlen(msg));
716 xfree(msg);
717
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__);
721
722 /* Success */
723 return (1);
724 }
725
726 void
727 mm_session_pty_cleanup2(Session *s)
728 {
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 */
739 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
740 error("close(s->ptymaster/%d): %s",
741 s->ptymaster, strerror(errno));
742
743 /* unlink pty from session */
744 s->ttyfd = -1;
745 }
746
747 #ifdef USE_PAM
748 void
749 mm_start_pam(Authctxt *authctxt)
750 {
751 Buffer m;
752
753 debug3("%s entering", __func__);
754 if (!options.use_pam)
755 fatal("UsePAM=no, but ended up in %s anyway", __func__);
756
757 buffer_init(&m);
758 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
759
760 buffer_free(&m);
761 }
762
763 u_int
764 mm_do_pam_account(void)
765 {
766 Buffer m;
767 u_int ret;
768 char *msg;
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
777 mm_request_receive_expect(pmonitor->m_recvfd,
778 MONITOR_ANS_PAM_ACCOUNT, &m);
779 ret = buffer_get_int(&m);
780 msg = buffer_get_string(&m, NULL);
781 buffer_append(&loginmsg, msg, strlen(msg));
782 xfree(msg);
783
784 buffer_free(&m);
785
786 debug3("%s returning %d", __func__, ret);
787
788 return (ret);
789 }
790
791 void *
792 mm_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
813 int
814 mm_sshpam_query(void *ctx, char **name, char **info,
815 u_int *num, char ***prompts, u_int **echo_on)
816 {
817 Buffer m;
818 u_int i;
819 int ret;
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);
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));
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
844 int
845 mm_sshpam_respond(void *ctx, u_int num, char **resp)
846 {
847 Buffer m;
848 u_int i;
849 int ret;
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
865 void
866 mm_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 }
877 #endif /* USE_PAM */
878
879 /* Request process termination */
880
881 void
882 mm_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
891 int
892 mm_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
911 static void
912 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
913 char ***prompts, u_int **echo_on)
914 {
915 *name = xstrdup("");
916 *infotxt = xstrdup("");
917 *numprompts = 1;
918 *prompts = xcalloc(*numprompts, sizeof(char *));
919 *echo_on = xcalloc(*numprompts, sizeof(u_int));
920 (*echo_on)[0] = 0;
921 }
922
923 int
924 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
925 u_int *numprompts, char ***prompts, u_int **echo_on)
926 {
927 Buffer m;
928 u_int success;
929 char *challenge;
930
931 debug3("%s: entering", __func__);
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);
938 success = buffer_get_int(&m);
939 if (success == 0) {
940 debug3("%s: no challenge", __func__);
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
952 debug3("%s: received challenge: %s", __func__, challenge);
953
954 return (0);
955 }
956
957 int
958 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
959 {
960 Buffer m;
961 int authok;
962
963 debug3("%s: entering", __func__);
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
980 #ifdef SKEY
981 int
982 mm_skey_query(void *ctx, char **name, char **infotxt,
983 u_int *numprompts, char ***prompts, u_int **echo_on)
984 {
985 Buffer m;
986 u_int success;
987 char *challenge;
988
989 debug3("%s: entering", __func__);
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);
996 success = buffer_get_int(&m);
997 if (success == 0) {
998 debug3("%s: no challenge", __func__);
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
1007 debug3("%s: received challenge: %s", __func__, challenge);
1008
1009 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1010
1011 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1012 xfree(challenge);
1013
1014 return (0);
1015 }
1016
1017 int
1018 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1019 {
1020 Buffer m;
1021 int authok;
1022
1023 debug3("%s: entering", __func__);
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 }
1039 #endif /* SKEY */
1040
1041 void
1042 mm_ssh1_session_id(u_char session_id[16])
1043 {
1044 Buffer m;
1045 int i;
1046
1047 debug3("%s entering", __func__);
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
1057 int
1058 mm_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;
1064 int allowed = 0, have_forced = 0;
1065
1066 debug3("%s entering", __func__);
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
1076 /* fake forced command */
1077 auth_clear_options();
1078 have_forced = buffer_get_int(&m);
1079 forced_command = have_forced ? xstrdup("true") : NULL;
1080
1081 if (allowed && rkey != NULL) {
1082 blob = buffer_get_string(&m, &blen);
1083 if ((key = key_from_blob(blob, blen)) == NULL)
1084 fatal("%s: key_from_blob failed", __func__);
1085 *rkey = key;
1086 xfree(blob);
1087 }
1088 mm_send_debug(&m);
1089 buffer_free(&m);
1090
1091 return (allowed);
1092 }
1093
1094 BIGNUM *
1095 mm_auth_rsa_generate_challenge(Key *key)
1096 {
1097 Buffer m;
1098 BIGNUM *challenge;
1099 u_char *blob;
1100 u_int blen;
1101
1102 debug3("%s entering", __func__);
1103
1104 if ((challenge = BN_new()) == NULL)
1105 fatal("%s: BN_new failed", __func__);
1106
1107 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1108 if (key_to_blob(key, &blob, &blen) == 0)
1109 fatal("%s: key_to_blob failed", __func__);
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
1125 int
1126 mm_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
1133 debug3("%s entering", __func__);
1134
1135 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1136 if (key_to_blob(key, &blob, &blen) == 0)
1137 fatal("%s: key_to_blob failed", __func__);
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 }
1153
1154 #ifdef SSH_AUDIT_EVENTS
1155 void
1156 mm_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
1169 void
1170 mm_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
1184 #ifdef GSSAPI
1185 OM_uint32
1186 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1187 {
1188 Buffer m;
1189 OM_uint32 major;
1190
1191 /* Client doesn't get to see the context */
1192 *ctx = NULL;
1193
1194 buffer_init(&m);
1195 buffer_put_string(&m, goid->elements, goid->length);
1196
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);
1201
1202 buffer_free(&m);
1203 return (major);
1204 }
1205
1206 OM_uint32
1207 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1208 gss_buffer_desc *out, OM_uint32 *flags)
1209 {
1210 Buffer m;
1211 OM_uint32 major;
1212 u_int len;
1213
1214 buffer_init(&m);
1215 buffer_put_string(&m, in->value, in->length);
1216
1217 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1218 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1219
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);
1225
1226 buffer_free(&m);
1227
1228 return (major);
1229 }
1230
1231 OM_uint32
1232 mm_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
1250 int
1251 mm_ssh_gssapi_userok(char *user)
1252 {
1253 Buffer m;
1254 int authenticated = 0;
1255
1256 buffer_init(&m);
1257
1258 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1259 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1260 &m);
1261
1262 authenticated = buffer_get_int(&m);
1263
1264 buffer_free(&m);
1265 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1266 return (authenticated);
1267 }
1268 #endif /* GSSAPI */
1269
1270 #ifdef JPAKE
1271 void
1272 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1273 char **hash_scheme, char **salt)
1274 {
1275 Buffer m;
1276
1277 debug3("%s entering", __func__);
1278
1279 buffer_init(&m);
1280 mm_request_send(pmonitor->m_recvfd,
1281 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1282
1283 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1284 mm_request_receive_expect(pmonitor->m_recvfd,
1285 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1286
1287 *hash_scheme = buffer_get_string(&m, NULL);
1288 *salt = buffer_get_string(&m, NULL);
1289
1290 buffer_free(&m);
1291 }
1292
1293 void
1294 mm_jpake_step1(struct modp_group *grp,
1295 u_char **id, u_int *id_len,
1296 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1297 u_char **priv1_proof, u_int *priv1_proof_len,
1298 u_char **priv2_proof, u_int *priv2_proof_len)
1299 {
1300 Buffer m;
1301
1302 debug3("%s entering", __func__);
1303
1304 buffer_init(&m);
1305 mm_request_send(pmonitor->m_recvfd,
1306 MONITOR_REQ_JPAKE_STEP1, &m);
1307
1308 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1309 mm_request_receive_expect(pmonitor->m_recvfd,
1310 MONITOR_ANS_JPAKE_STEP1, &m);
1311
1312 if ((*priv1 = BN_new()) == NULL ||
1313 (*priv2 = BN_new()) == NULL ||
1314 (*g_priv1 = BN_new()) == NULL ||
1315 (*g_priv2 = BN_new()) == NULL)
1316 fatal("%s: BN_new", __func__);
1317
1318 *id = buffer_get_string(&m, id_len);
1319 /* priv1 and priv2 are, well, private */
1320 buffer_get_bignum2(&m, *g_priv1);
1321 buffer_get_bignum2(&m, *g_priv2);
1322 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1323 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1324
1325 buffer_free(&m);
1326 }
1327
1328 void
1329 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1330 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1331 const u_char *theirid, u_int theirid_len,
1332 const u_char *myid, u_int myid_len,
1333 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1334 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1335 BIGNUM **newpub,
1336 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1337 {
1338 Buffer m;
1339
1340 debug3("%s entering", __func__);
1341
1342 buffer_init(&m);
1343 /* monitor already has all bignums except theirpub1, theirpub2 */
1344 buffer_put_bignum2(&m, theirpub1);
1345 buffer_put_bignum2(&m, theirpub2);
1346 /* monitor already knows our id */
1347 buffer_put_string(&m, theirid, theirid_len);
1348 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1349 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1350
1351 mm_request_send(pmonitor->m_recvfd,
1352 MONITOR_REQ_JPAKE_STEP2, &m);
1353
1354 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1355 mm_request_receive_expect(pmonitor->m_recvfd,
1356 MONITOR_ANS_JPAKE_STEP2, &m);
1357
1358 if ((*newpub = BN_new()) == NULL)
1359 fatal("%s: BN_new", __func__);
1360
1361 buffer_get_bignum2(&m, *newpub);
1362 *newpub_exponent_proof = buffer_get_string(&m,
1363 newpub_exponent_proof_len);
1364
1365 buffer_free(&m);
1366 }
1367
1368 void
1369 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1370 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1371 BIGNUM *theirpub1, BIGNUM *theirpub2,
1372 const u_char *my_id, u_int my_id_len,
1373 const u_char *their_id, u_int their_id_len,
1374 const u_char *sess_id, u_int sess_id_len,
1375 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1376 BIGNUM **k,
1377 u_char **confirm_hash, u_int *confirm_hash_len)
1378 {
1379 Buffer m;
1380
1381 debug3("%s entering", __func__);
1382
1383 buffer_init(&m);
1384 /* monitor already has all bignums except step2_val */
1385 buffer_put_bignum2(&m, step2_val);
1386 /* monitor already knows all the ids */
1387 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1388
1389 mm_request_send(pmonitor->m_recvfd,
1390 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1391
1392 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1393 mm_request_receive_expect(pmonitor->m_recvfd,
1394 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1395
1396 /* 'k' is sensitive and stays in the monitor */
1397 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1398
1399 buffer_free(&m);
1400 }
1401
1402 int
1403 mm_jpake_check_confirm(const BIGNUM *k,
1404 const u_char *peer_id, u_int peer_id_len,
1405 const u_char *sess_id, u_int sess_id_len,
1406 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1407 {
1408 Buffer m;
1409 int success = 0;
1410
1411 debug3("%s entering", __func__);
1412
1413 buffer_init(&m);
1414 /* k is dummy in slave, ignored */
1415 /* monitor knows all the ids */
1416 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1417 mm_request_send(pmonitor->m_recvfd,
1418 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1419
1420 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1421 mm_request_receive_expect(pmonitor->m_recvfd,
1422 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1423
1424 success = buffer_get_int(&m);
1425 buffer_free(&m);
1426
1427 debug3("%s: success = %d", __func__, success);
1428 return success;
1429 }
1430 #endif /* JPAKE */
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