?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
No empty .Rs/.Re
[netbsd-mini2440.git] / crypto / external / bsd / openssh / dist / monitor_wrap.c
blob095f8a1a472bd435c04b3674cc07917e06fe870b
1 /* $NetBSD: monitor_wrap.c,v 1.1.1.2 2009/12/27 01:06:59 christos Exp $ */
2 /* $OpenBSD: monitor_wrap.c,v 1.68 2009/06/22 05:39:28 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 1.2 2009/06/07 22:38:46 christos 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 static void
347 mm_send_debug(Buffer *m)
348 {
349 char *msg;
350
351 while (buffer_len(m)) {
352 msg = buffer_get_string(m, NULL);
353 debug3("%s: Sending debug: %s", __func__, msg);
354 packet_send_debug("%s", msg);
355 xfree(msg);
356 }
357 }
358
359 int
360 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
361 {
362 Buffer m;
363 u_char *blob;
364 u_int len;
365 int allowed = 0, have_forced = 0;
366
367 debug3("%s entering", __func__);
368
369 /* Convert the key to a blob and the pass it over */
370 if (!key_to_blob(key, &blob, &len))
371 return (0);
372
373 buffer_init(&m);
374 buffer_put_int(&m, type);
375 buffer_put_cstring(&m, user ? user : "");
376 buffer_put_cstring(&m, host ? host : "");
377 buffer_put_string(&m, blob, len);
378 xfree(blob);
379
380 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
381
382 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
383 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
384
385 allowed = buffer_get_int(&m);
386
387 /* fake forced command */
388 auth_clear_options();
389 have_forced = buffer_get_int(&m);
390 forced_command = have_forced ? xstrdup("true") : NULL;
391
392 /* Send potential debug messages */
393 mm_send_debug(&m);
394
395 buffer_free(&m);
396
397 return (allowed);
398 }
399
400 /*
401 * This key verify needs to send the key type along, because the
402 * privileged parent makes the decision if the key is allowed
403 * for authentication.
404 */
405
406 int
407 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
408 {
409 Buffer m;
410 u_char *blob;
411 u_int len;
412 int verified = 0;
413
414 debug3("%s entering", __func__);
415
416 /* Convert the key to a blob and the pass it over */
417 if (!key_to_blob(key, &blob, &len))
418 return (0);
419
420 buffer_init(&m);
421 buffer_put_string(&m, blob, len);
422 buffer_put_string(&m, sig, siglen);
423 buffer_put_string(&m, data, datalen);
424 xfree(blob);
425
426 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
427
428 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
429 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
430
431 verified = buffer_get_int(&m);
432
433 buffer_free(&m);
434
435 return (verified);
436 }
437
438 /* Export key state after authentication */
439 Newkeys *
440 mm_newkeys_from_blob(u_char *blob, int blen)
441 {
442 Buffer b;
443 u_int len;
444 Newkeys *newkey = NULL;
445 Enc *enc;
446 Mac *mac;
447 Comp *comp;
448
449 debug3("%s: %p(%d)", __func__, blob, blen);
450 #ifdef DEBUG_PK
451 dump_base64(stderr, blob, blen);
452 #endif
453 buffer_init(&b);
454 buffer_append(&b, blob, blen);
455
456 newkey = xmalloc(sizeof(*newkey));
457 enc = &newkey->enc;
458 mac = &newkey->mac;
459 comp = &newkey->comp;
460
461 /* Enc structure */
462 enc->name = buffer_get_string(&b, NULL);
463 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
464 enc->enabled = buffer_get_int(&b);
465 enc->block_size = buffer_get_int(&b);
466 enc->key = buffer_get_string(&b, &enc->key_len);
467 enc->iv = buffer_get_string(&b, &len);
468 if (len != enc->block_size)
469 fatal("%s: bad ivlen: expected %u != %u", __func__,
470 enc->block_size, len);
471
472 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
473 fatal("%s: bad cipher name %s or pointer %p", __func__,
474 enc->name, enc->cipher);
475
476 /* Mac structure */
477 mac->name = buffer_get_string(&b, NULL);
478 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
479 fatal("%s: can not setup mac %s", __func__, mac->name);
480 mac->enabled = buffer_get_int(&b);
481 mac->key = buffer_get_string(&b, &len);
482 if (len > mac->key_len)
483 fatal("%s: bad mac key length: %u > %d", __func__, len,
484 mac->key_len);
485 mac->key_len = len;
486
487 /* Comp structure */
488 comp->type = buffer_get_int(&b);
489 comp->enabled = buffer_get_int(&b);
490 comp->name = buffer_get_string(&b, NULL);
491
492 len = buffer_len(&b);
493 if (len != 0)
494 error("newkeys_from_blob: remaining bytes in blob %u", len);
495 buffer_free(&b);
496 return (newkey);
497 }
498
499 int
500 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
501 {
502 Buffer b;
503 int len;
504 Enc *enc;
505 Mac *mac;
506 Comp *comp;
507 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
508
509 debug3("%s: converting %p", __func__, newkey);
510
511 if (newkey == NULL) {
512 error("%s: newkey == NULL", __func__);
513 return 0;
514 }
515 enc = &newkey->enc;
516 mac = &newkey->mac;
517 comp = &newkey->comp;
518
519 buffer_init(&b);
520 /* Enc structure */
521 buffer_put_cstring(&b, enc->name);
522 /* The cipher struct is constant and shared, you export pointer */
523 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
524 buffer_put_int(&b, enc->enabled);
525 buffer_put_int(&b, enc->block_size);
526 buffer_put_string(&b, enc->key, enc->key_len);
527 packet_get_keyiv(mode, enc->iv, enc->block_size);
528 buffer_put_string(&b, enc->iv, enc->block_size);
529
530 /* Mac structure */
531 buffer_put_cstring(&b, mac->name);
532 buffer_put_int(&b, mac->enabled);
533 buffer_put_string(&b, mac->key, mac->key_len);
534
535 /* Comp structure */
536 buffer_put_int(&b, comp->type);
537 buffer_put_int(&b, comp->enabled);
538 buffer_put_cstring(&b, comp->name);
539
540 len = buffer_len(&b);
541 if (lenp != NULL)
542 *lenp = len;
543 if (blobp != NULL) {
544 *blobp = xmalloc(len);
545 memcpy(*blobp, buffer_ptr(&b), len);
546 }
547 memset(buffer_ptr(&b), 0, len);
548 buffer_free(&b);
549 return len;
550 }
551
552 static void
553 mm_send_kex(Buffer *m, Kex *kex)
554 {
555 buffer_put_string(m, kex->session_id, kex->session_id_len);
556 buffer_put_int(m, kex->we_need);
557 buffer_put_int(m, kex->hostkey_type);
558 buffer_put_int(m, kex->kex_type);
559 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
560 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
561 buffer_put_int(m, kex->flags);
562 buffer_put_cstring(m, kex->client_version_string);
563 buffer_put_cstring(m, kex->server_version_string);
564 }
565
566 void
567 mm_send_keystate(struct monitor *monitor)
568 {
569 Buffer m, *input, *output;
570 u_char *blob, *p;
571 u_int bloblen, plen;
572 u_int32_t seqnr, packets;
573 u_int64_t blocks, bytes;
574
575 buffer_init(&m);
576
577 if (!compat20) {
578 u_char iv[24];
579 u_char *key;
580 u_int ivlen, keylen;
581
582 buffer_put_int(&m, packet_get_protocol_flags());
583
584 buffer_put_int(&m, packet_get_ssh1_cipher());
585
586 debug3("%s: Sending ssh1 KEY+IV", __func__);
587 keylen = packet_get_encryption_key(NULL);
588 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
589 keylen = packet_get_encryption_key(key);
590 buffer_put_string(&m, key, keylen);
591 memset(key, 0, keylen);
592 xfree(key);
593
594 ivlen = packet_get_keyiv_len(MODE_OUT);
595 packet_get_keyiv(MODE_OUT, iv, ivlen);
596 buffer_put_string(&m, iv, ivlen);
597 ivlen = packet_get_keyiv_len(MODE_OUT);
598 packet_get_keyiv(MODE_IN, iv, ivlen);
599 buffer_put_string(&m, iv, ivlen);
600 goto skip;
601 } else {
602 /* Kex for rekeying */
603 mm_send_kex(&m, *monitor->m_pkex);
604 }
605
606 debug3("%s: Sending new keys: %p %p",
607 __func__, packet_get_newkeys(MODE_OUT),
608 packet_get_newkeys(MODE_IN));
609
610 /* Keys from Kex */
611 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
612 fatal("%s: conversion of newkeys failed", __func__);
613
614 buffer_put_string(&m, blob, bloblen);
615 xfree(blob);
616
617 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
618 fatal("%s: conversion of newkeys failed", __func__);
619
620 buffer_put_string(&m, blob, bloblen);
621 xfree(blob);
622
623 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
624 buffer_put_int(&m, seqnr);
625 buffer_put_int64(&m, blocks);
626 buffer_put_int(&m, packets);
627 buffer_put_int64(&m, bytes);
628 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
629 buffer_put_int(&m, seqnr);
630 buffer_put_int64(&m, blocks);
631 buffer_put_int(&m, packets);
632 buffer_put_int64(&m, bytes);
633
634 debug3("%s: New keys have been sent", __func__);
635 skip:
636 /* More key context */
637 plen = packet_get_keycontext(MODE_OUT, NULL);
638 p = xmalloc(plen+1);
639 packet_get_keycontext(MODE_OUT, p);
640 buffer_put_string(&m, p, plen);
641 xfree(p);
642
643 plen = packet_get_keycontext(MODE_IN, NULL);
644 p = xmalloc(plen+1);
645 packet_get_keycontext(MODE_IN, p);
646 buffer_put_string(&m, p, plen);
647 xfree(p);
648
649 /* Compression state */
650 debug3("%s: Sending compression state", __func__);
651 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
652 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
653
654 /* Network I/O buffers */
655 input = (Buffer *)packet_get_input();
656 output = (Buffer *)packet_get_output();
657 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
658 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
659
660 /* Roaming */
661 if (compat20) {
662 buffer_put_int64(&m, get_sent_bytes());
663 buffer_put_int64(&m, get_recv_bytes());
664 }
665
666 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
667 debug3("%s: Finished sending state", __func__);
668
669 buffer_free(&m);
670 }
671
672 int
673 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
674 {
675 Buffer m;
676 char *p, *msg;
677 int success = 0, tmp1 = -1, tmp2 = -1;
678
679 /* Kludge: ensure there are fds free to receive the pty/tty */
680 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
681 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
682 error("%s: cannot allocate fds for pty", __func__);
683 if (tmp1 > 0)
684 close(tmp1);
685 if (tmp2 > 0)
686 close(tmp2);
687 return 0;
688 }
689 close(tmp1);
690 close(tmp2);
691
692 buffer_init(&m);
693 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
694
695 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
696 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
697
698 success = buffer_get_int(&m);
699 if (success == 0) {
700 debug3("%s: pty alloc failed", __func__);
701 buffer_free(&m);
702 return (0);
703 }
704 p = buffer_get_string(&m, NULL);
705 msg = buffer_get_string(&m, NULL);
706 buffer_free(&m);
707
708 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
709 xfree(p);
710
711 buffer_append(&loginmsg, msg, strlen(msg));
712 xfree(msg);
713
714 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
715 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
716 fatal("%s: receive fds failed", __func__);
717
718 /* Success */
719 return (1);
720 }
721
722 void
723 mm_session_pty_cleanup2(Session *s)
724 {
725 Buffer m;
726
727 if (s->ttyfd == -1)
728 return;
729 buffer_init(&m);
730 buffer_put_cstring(&m, s->tty);
731 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
732 buffer_free(&m);
733
734 /* closed dup'ed master */
735 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
736 error("close(s->ptymaster/%d): %s",
737 s->ptymaster, strerror(errno));
738
739 /* unlink pty from session */
740 s->ttyfd = -1;
741 }
742
743 #ifdef USE_PAM
744 void
745 mm_start_pam(Authctxt *authctxt)
746 {
747 Buffer m;
748
749 debug3("%s entering", __func__);
750 if (!options.use_pam)
751 fatal("UsePAM=no, but ended up in %s anyway", __func__);
752
753 buffer_init(&m);
754 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
755
756 buffer_free(&m);
757 }
758
759 u_int
760 mm_do_pam_account(void)
761 {
762 Buffer m;
763 u_int ret;
764 char *msg;
765
766 debug3("%s entering", __func__);
767 if (!options.use_pam)
768 fatal("UsePAM=no, but ended up in %s anyway", __func__);
769
770 buffer_init(&m);
771 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
772
773 mm_request_receive_expect(pmonitor->m_recvfd,
774 MONITOR_ANS_PAM_ACCOUNT, &m);
775 ret = buffer_get_int(&m);
776 msg = buffer_get_string(&m, NULL);
777 buffer_append(&loginmsg, msg, strlen(msg));
778 xfree(msg);
779
780 buffer_free(&m);
781
782 debug3("%s returning %d", __func__, ret);
783
784 return (ret);
785 }
786
787 void *
788 mm_sshpam_init_ctx(Authctxt *authctxt)
789 {
790 Buffer m;
791 int success;
792
793 debug3("%s", __func__);
794 buffer_init(&m);
795 buffer_put_cstring(&m, authctxt->user);
796 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
797 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
798 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
799 success = buffer_get_int(&m);
800 if (success == 0) {
801 debug3("%s: pam_init_ctx failed", __func__);
802 buffer_free(&m);
803 return (NULL);
804 }
805 buffer_free(&m);
806 return (authctxt);
807 }
808
809 int
810 mm_sshpam_query(void *ctx, char **name, char **info,
811 u_int *num, char ***prompts, u_int **echo_on)
812 {
813 Buffer m;
814 u_int i;
815 int ret;
816
817 debug3("%s", __func__);
818 buffer_init(&m);
819 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
820 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
821 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
822 ret = buffer_get_int(&m);
823 debug3("%s: pam_query returned %d", __func__, ret);
824 *name = buffer_get_string(&m, NULL);
825 *info = buffer_get_string(&m, NULL);
826 *num = buffer_get_int(&m);
827 if (*num > PAM_MAX_NUM_MSG)
828 fatal("%s: received %u PAM messages, expected <= %u",
829 __func__, *num, PAM_MAX_NUM_MSG);
830 *prompts = xcalloc((*num + 1), sizeof(char *));
831 *echo_on = xcalloc((*num + 1), sizeof(u_int));
832 for (i = 0; i < *num; ++i) {
833 (*prompts)[i] = buffer_get_string(&m, NULL);
834 (*echo_on)[i] = buffer_get_int(&m);
835 }
836 buffer_free(&m);
837 return (ret);
838 }
839
840 int
841 mm_sshpam_respond(void *ctx, u_int num, char **resp)
842 {
843 Buffer m;
844 u_int i;
845 int ret;
846
847 debug3("%s", __func__);
848 buffer_init(&m);
849 buffer_put_int(&m, num);
850 for (i = 0; i < num; ++i)
851 buffer_put_cstring(&m, resp[i]);
852 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
853 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
854 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
855 ret = buffer_get_int(&m);
856 debug3("%s: pam_respond returned %d", __func__, ret);
857 buffer_free(&m);
858 return (ret);
859 }
860
861 void
862 mm_sshpam_free_ctx(void *ctxtp)
863 {
864 Buffer m;
865
866 debug3("%s", __func__);
867 buffer_init(&m);
868 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
869 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
870 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
871 buffer_free(&m);
872 }
873 #endif /* USE_PAM */
874
875 /* Request process termination */
876
877 void
878 mm_terminate(void)
879 {
880 Buffer m;
881
882 buffer_init(&m);
883 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
884 buffer_free(&m);
885 }
886
887 int
888 mm_ssh1_session_key(BIGNUM *num)
889 {
890 int rsafail;
891 Buffer m;
892
893 buffer_init(&m);
894 buffer_put_bignum2(&m, num);
895 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
896
897 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
898
899 rsafail = buffer_get_int(&m);
900 buffer_get_bignum2(&m, num);
901
902 buffer_free(&m);
903
904 return (rsafail);
905 }
906
907 #if defined(BSD_AUTH) || defined(SKEY)
908 static void
909 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
910 char ***prompts, u_int **echo_on)
911 {
912 *name = xstrdup("");
913 *infotxt = xstrdup("");
914 *numprompts = 1;
915 *prompts = xcalloc(*numprompts, sizeof(char *));
916 *echo_on = xcalloc(*numprompts, sizeof(u_int));
917 (*echo_on)[0] = 0;
918 }
919 #endif
920
921 #ifdef BSD_AUTH
922 int
923 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
924 u_int *numprompts, char ***prompts, u_int **echo_on)
925 {
926 Buffer m;
927 u_int success;
928 char *challenge;
929
930 debug3("%s: entering", __func__);
931
932 buffer_init(&m);
933 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
934
935 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
936 &m);
937 success = buffer_get_int(&m);
938 if (success == 0) {
939 debug3("%s: no challenge", __func__);
940 buffer_free(&m);
941 return (-1);
942 }
943
944 /* Get the challenge, and format the response */
945 challenge = buffer_get_string(&m, NULL);
946 buffer_free(&m);
947
948 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
949 (*prompts)[0] = challenge;
950
951 debug3("%s: received challenge: %s", __func__, challenge);
952
953 return (0);
954 }
955
956 int
957 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
958 {
959 Buffer m;
960 int authok;
961
962 debug3("%s: entering", __func__);
963 if (numresponses != 1)
964 return (-1);
965
966 buffer_init(&m);
967 buffer_put_cstring(&m, responses[0]);
968 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
969
970 mm_request_receive_expect(pmonitor->m_recvfd,
971 MONITOR_ANS_BSDAUTHRESPOND, &m);
972
973 authok = buffer_get_int(&m);
974 buffer_free(&m);
975
976 return ((authok == 0) ? -1 : 0);
977 }
978 #endif
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 GSSAPI
1155 OM_uint32
1156 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1157 {
1158 Buffer m;
1159 OM_uint32 major;
1160
1161 /* Client doesn't get to see the context */
1162 *ctx = NULL;
1163
1164 buffer_init(&m);
1165 buffer_put_string(&m, goid->elements, goid->length);
1166
1167 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1168 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1169
1170 major = buffer_get_int(&m);
1171
1172 buffer_free(&m);
1173 return (major);
1174 }
1175
1176 OM_uint32
1177 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1178 gss_buffer_desc *out, OM_uint32 *flags)
1179 {
1180 Buffer m;
1181 OM_uint32 major;
1182 u_int len;
1183
1184 buffer_init(&m);
1185 buffer_put_string(&m, in->value, in->length);
1186
1187 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1188 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1189
1190 major = buffer_get_int(&m);
1191 out->value = buffer_get_string(&m, &len);
1192 out->length = len;
1193 if (flags)
1194 *flags = buffer_get_int(&m);
1195
1196 buffer_free(&m);
1197
1198 return (major);
1199 }
1200
1201 OM_uint32
1202 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1203 {
1204 Buffer m;
1205 OM_uint32 major;
1206
1207 buffer_init(&m);
1208 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1209 buffer_put_string(&m, gssmic->value, gssmic->length);
1210
1211 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1212 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1213 &m);
1214
1215 major = buffer_get_int(&m);
1216 buffer_free(&m);
1217 return(major);
1218 }
1219
1220 int
1221 mm_ssh_gssapi_userok(char *user)
1222 {
1223 Buffer m;
1224 int authenticated = 0;
1225
1226 buffer_init(&m);
1227
1228 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1229 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1230 &m);
1231
1232 authenticated = buffer_get_int(&m);
1233
1234 buffer_free(&m);
1235 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1236 return (authenticated);
1237 }
1238 #endif /* GSSAPI */
1239
1240 #ifdef JPAKE
1241 void
1242 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1243 char **hash_scheme, char **salt)
1244 {
1245 Buffer m;
1246
1247 debug3("%s entering", __func__);
1248
1249 buffer_init(&m);
1250 mm_request_send(pmonitor->m_recvfd,
1251 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1252
1253 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1254 mm_request_receive_expect(pmonitor->m_recvfd,
1255 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1256
1257 *hash_scheme = buffer_get_string(&m, NULL);
1258 *salt = buffer_get_string(&m, NULL);
1259
1260 buffer_free(&m);
1261 }
1262
1263 void
1264 mm_jpake_step1(struct modp_group *grp,
1265 u_char **id, u_int *id_len,
1266 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1267 u_char **priv1_proof, u_int *priv1_proof_len,
1268 u_char **priv2_proof, u_int *priv2_proof_len)
1269 {
1270 Buffer m;
1271
1272 debug3("%s entering", __func__);
1273
1274 buffer_init(&m);
1275 mm_request_send(pmonitor->m_recvfd,
1276 MONITOR_REQ_JPAKE_STEP1, &m);
1277
1278 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1279 mm_request_receive_expect(pmonitor->m_recvfd,
1280 MONITOR_ANS_JPAKE_STEP1, &m);
1281
1282 if ((*priv1 = BN_new()) == NULL ||
1283 (*priv2 = BN_new()) == NULL ||
1284 (*g_priv1 = BN_new()) == NULL ||
1285 (*g_priv2 = BN_new()) == NULL)
1286 fatal("%s: BN_new", __func__);
1287
1288 *id = buffer_get_string(&m, id_len);
1289 /* priv1 and priv2 are, well, private */
1290 buffer_get_bignum2(&m, *g_priv1);
1291 buffer_get_bignum2(&m, *g_priv2);
1292 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1293 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1294
1295 buffer_free(&m);
1296 }
1297
1298 void
1299 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1300 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1301 const u_char *theirid, u_int theirid_len,
1302 const u_char *myid, u_int myid_len,
1303 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1304 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1305 BIGNUM **newpub,
1306 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1307 {
1308 Buffer m;
1309
1310 debug3("%s entering", __func__);
1311
1312 buffer_init(&m);
1313 /* monitor already has all bignums except theirpub1, theirpub2 */
1314 buffer_put_bignum2(&m, theirpub1);
1315 buffer_put_bignum2(&m, theirpub2);
1316 /* monitor already knows our id */
1317 buffer_put_string(&m, theirid, theirid_len);
1318 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1319 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1320
1321 mm_request_send(pmonitor->m_recvfd,
1322 MONITOR_REQ_JPAKE_STEP2, &m);
1323
1324 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1325 mm_request_receive_expect(pmonitor->m_recvfd,
1326 MONITOR_ANS_JPAKE_STEP2, &m);
1327
1328 if ((*newpub = BN_new()) == NULL)
1329 fatal("%s: BN_new", __func__);
1330
1331 buffer_get_bignum2(&m, *newpub);
1332 *newpub_exponent_proof = buffer_get_string(&m,
1333 newpub_exponent_proof_len);
1334
1335 buffer_free(&m);
1336 }
1337
1338 void
1339 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1340 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1341 BIGNUM *theirpub1, BIGNUM *theirpub2,
1342 const u_char *my_id, u_int my_id_len,
1343 const u_char *their_id, u_int their_id_len,
1344 const u_char *sess_id, u_int sess_id_len,
1345 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1346 BIGNUM **k,
1347 u_char **confirm_hash, u_int *confirm_hash_len)
1348 {
1349 Buffer m;
1350
1351 debug3("%s entering", __func__);
1352
1353 buffer_init(&m);
1354 /* monitor already has all bignums except step2_val */
1355 buffer_put_bignum2(&m, step2_val);
1356 /* monitor already knows all the ids */
1357 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1358
1359 mm_request_send(pmonitor->m_recvfd,
1360 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1361
1362 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1363 mm_request_receive_expect(pmonitor->m_recvfd,
1364 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1365
1366 /* 'k' is sensitive and stays in the monitor */
1367 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1368
1369 buffer_free(&m);
1370 }
1371
1372 int
1373 mm_jpake_check_confirm(const BIGNUM *k,
1374 const u_char *peer_id, u_int peer_id_len,
1375 const u_char *sess_id, u_int sess_id_len,
1376 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1377 {
1378 Buffer m;
1379 int success = 0;
1380
1381 debug3("%s entering", __func__);
1382
1383 buffer_init(&m);
1384 /* k is dummy in slave, ignored */
1385 /* monitor knows all the ids */
1386 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1387 mm_request_send(pmonitor->m_recvfd,
1388 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1389
1390 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1391 mm_request_receive_expect(pmonitor->m_recvfd,
1392 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1393
1394 success = buffer_get_int(&m);
1395 buffer_free(&m);
1396
1397 debug3("%s: success = %d", __func__, success);
1398 return success;
1399 }
1400 #endif /* JPAKE */
1401
1402 #ifdef KRB4
1403 int
1404 mm_auth_krb4(Authctxt *authctxt, void *_auth, char **client, void *_reply)
1405 {
1406 KTEXT auth, reply;
1407 Buffer m;
1408 u_int rlen;
1409 int success = 0;
1410 char *p;
1411
1412 debug3("%s entering", __func__);
1413 auth = _auth;
1414 reply = _reply;
1415
1416 buffer_init(&m);
1417 buffer_put_string(&m, auth->dat, auth->length);
1418
1419 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB4, &m);
1420 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB4, &m);
1421
1422 success = buffer_get_int(&m);
1423 if (success) {
1424 *client = buffer_get_string(&m, NULL);
1425 p = buffer_get_string(&m, &rlen);
1426 if (rlen >= MAX_KTXT_LEN)
1427 fatal("%s: reply from monitor too large", __func__);
1428 reply->length = rlen;
1429 memcpy(reply->dat, p, rlen);
1430 memset(p, 0, rlen);
1431 xfree(p);
1432 }
1433 buffer_free(&m);
1434 return (success);
1435 }
1436 #endif
1437
1438 #ifdef KRB5
1439 int
1440 mm_auth_krb5(void *ctx, void *argp, char **userp, void *resp)
1441 {
1442 krb5_data *tkt, *reply;
1443 Buffer m;
1444 int success;
1445
1446 debug3("%s entering", __func__);
1447 tkt = (krb5_data *) argp;
1448 reply = (krb5_data *) resp;
1449
1450 buffer_init(&m);
1451 buffer_put_string(&m, tkt->data, tkt->length);
1452
1453 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB5, &m);
1454 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB5, &m);
1455
1456 success = buffer_get_int(&m);
1457 if (success) {
1458 u_int len;
1459
1460 *userp = buffer_get_string(&m, NULL);
1461 reply->data = buffer_get_string(&m, &len);
1462 reply->length = len;
1463 } else {
1464 memset(reply, 0, sizeof(*reply));
1465 *userp = NULL;
1466 }
1467
1468 buffer_free(&m);
1469 return (success);
1470 }
1471 #endif
NetBSD on the FriendlyARM MINI2440