1 /* $OpenBSD: monitor_wrap.c,v 1.73 2011/06/17 21:44:31 djm 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 #include "uuencode.h"
77
78 #include "channels.h"
79 #include "session.h"
80 #include "servconf.h"
81 #include "roaming.h"
82
83 /* Imports */
84 extern int compat20;
85 extern z_stream incoming_stream;
86 extern z_stream outgoing_stream;
87 extern struct monitor *pmonitor;
88 extern Buffer loginmsg;
89 extern ServerOptions options;
90
91 void
mm_log_handler(LogLevel level,const char * msg,void * ctx)92 mm_log_handler(LogLevel level, const char *msg, void *ctx)
93 {
94 Buffer log_msg;
95 struct monitor *mon = (struct monitor *)ctx;
96
97 if (mon->m_log_sendfd == -1)
98 fatal("%s: no log channel", __func__);
99
100 buffer_init(&log_msg);
101 /*
102 * Placeholder for packet length. Will be filled in with the actual
103 * packet length once the packet has been constucted. This saves
104 * fragile math.
105 */
106 buffer_put_int(&log_msg, 0);
107
108 buffer_put_int(&log_msg, level);
109 buffer_put_cstring(&log_msg, msg);
110 put_u32(buffer_ptr(&log_msg), buffer_len(&log_msg) - 4);
111 if (atomicio(vwrite, mon->m_log_sendfd, buffer_ptr(&log_msg),
112 buffer_len(&log_msg)) != buffer_len(&log_msg))
113 fatal("%s: write: %s", __func__, strerror(errno));
114 buffer_free(&log_msg);
115 }
116
117 int
mm_is_monitor(void)118 mm_is_monitor(void)
119 {
120 /*
121 * m_pid is only set in the privileged part, and
122 * points to the unprivileged child.
123 */
124 return (pmonitor && pmonitor->m_pid > 0);
125 }
126
127 void
mm_request_send(int sock,enum monitor_reqtype type,Buffer * m)128 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
129 {
130 u_int mlen = buffer_len(m);
131 u_char buf[5];
132
133 debug3("%s entering: type %d", __func__, type);
134
135 put_u32(buf, mlen + 1);
136 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
137 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
138 fatal("%s: write: %s", __func__, strerror(errno));
139 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
140 fatal("%s: write: %s", __func__, strerror(errno));
141 }
142
143 void
mm_request_receive(int sock,Buffer * m)144 mm_request_receive(int sock, Buffer *m)
145 {
146 u_char buf[4];
147 u_int msg_len;
148
149 debug3("%s entering", __func__);
150
151 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
152 if (errno == EPIPE)
153 cleanup_exit(255);
154 fatal("%s: read: %s", __func__, strerror(errno));
155 }
156 msg_len = get_u32(buf);
157 if (msg_len > 256 * 1024)
158 fatal("%s: read: bad msg_len %d", __func__, msg_len);
159 buffer_clear(m);
160 buffer_append_space(m, msg_len);
161 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
162 fatal("%s: read: %s", __func__, strerror(errno));
163 }
164
165 void
mm_request_receive_expect(int sock,enum monitor_reqtype type,Buffer * m)166 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
167 {
168 u_char rtype;
169
170 debug3("%s entering: type %d", __func__, type);
171
172 mm_request_receive(sock, m);
173 rtype = buffer_get_char(m);
174 if (rtype != type)
175 fatal("%s: read: rtype %d != type %d", __func__,
176 rtype, type);
177 }
178
179 DH *
mm_choose_dh(int min,int nbits,int max)180 mm_choose_dh(int min, int nbits, int max)
181 {
182 BIGNUM *p, *g;
183 int success = 0;
184 Buffer m;
185
186 buffer_init(&m);
187 buffer_put_int(&m, min);
188 buffer_put_int(&m, nbits);
189 buffer_put_int(&m, max);
190
191 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
192
193 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
194 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
195
196 success = buffer_get_char(&m);
197 if (success == 0)
198 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
199
200 if ((p = BN_new()) == NULL)
201 fatal("%s: BN_new failed", __func__);
202 if ((g = BN_new()) == NULL)
203 fatal("%s: BN_new failed", __func__);
204 buffer_get_bignum2(&m, p);
205 buffer_get_bignum2(&m, g);
206
207 debug3("%s: remaining %d", __func__, buffer_len(&m));
208 buffer_free(&m);
209
210 return (dh_new_group(g, p));
211 }
212
213 int
mm_key_sign(Key * key,u_char ** sigp,u_int * lenp,u_char * data,u_int datalen)214 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
215 {
216 Kex *kex = *pmonitor->m_pkex;
217 Buffer m;
218
219 debug3("%s entering", __func__);
220
221 buffer_init(&m);
222 buffer_put_int(&m, kex->host_key_index(key));
223 buffer_put_string(&m, data, datalen);
224
225 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
226
227 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
228 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
229 *sigp = buffer_get_string(&m, lenp);
230 buffer_free(&m);
231
232 return (0);
233 }
234
235 struct passwd *
mm_getpwnamallow(const char * username)236 mm_getpwnamallow(const char *username)
237 {
238 Buffer m;
239 struct passwd *pw;
240 u_int len, i;
241 ServerOptions *newopts;
242
243 debug3("%s entering", __func__);
244
245 buffer_init(&m);
246 buffer_put_cstring(&m, username);
247
248 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
249
250 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
251 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
252
253 if (buffer_get_char(&m) == 0) {
254 pw = NULL;
255 goto out;
256 }
257 pw = buffer_get_string(&m, &len);
258 if (len != sizeof(struct passwd))
259 fatal("%s: struct passwd size mismatch", __func__);
260 pw->pw_name = buffer_get_string(&m, NULL);
261 pw->pw_passwd = buffer_get_string(&m, NULL);
262 #ifdef HAVE_PW_GECOS_IN_PASSWD
263 pw->pw_gecos = buffer_get_string(&m, NULL);
264 #endif
265 #ifdef HAVE_PW_CLASS_IN_PASSWD
266 pw->pw_class = buffer_get_string(&m, NULL);
267 #endif
268 pw->pw_dir = buffer_get_string(&m, NULL);
269 pw->pw_shell = buffer_get_string(&m, NULL);
270
271 out:
272 /* copy options block as a Match directive may have changed some */
273 newopts = buffer_get_string(&m, &len);
274 if (len != sizeof(*newopts))
275 fatal("%s: option block size mismatch", __func__);
276
277 #define M_CP_STROPT(x) do { \
278 if (newopts->x != NULL) \
279 newopts->x = buffer_get_string(&m, NULL); \
280 } while (0)
281 #define M_CP_STRARRAYOPT(x, nx) do { \
282 for (i = 0; i < newopts->nx; i++) \
283 newopts->x[i] = buffer_get_string(&m, NULL); \
284 } while (0)
285 /* See comment in servconf.h */
286 COPY_MATCH_STRING_OPTS();
287 #undef M_CP_STROPT
288 #undef M_CP_STRARRAYOPT
289
290 copy_set_server_options(&options, newopts, 1);
291 xfree(newopts);
292
293 buffer_free(&m);
294
295 return (pw);
296 }
297
298 char *
mm_auth2_read_banner(void)299 mm_auth2_read_banner(void)
300 {
301 Buffer m;
302 char *banner;
303
304 debug3("%s entering", __func__);
305
306 buffer_init(&m);
307 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
308 buffer_clear(&m);
309
310 mm_request_receive_expect(pmonitor->m_recvfd,
311 MONITOR_ANS_AUTH2_READ_BANNER, &m);
312 banner = buffer_get_string(&m, NULL);
313 buffer_free(&m);
314
315 /* treat empty banner as missing banner */
316 if (strlen(banner) == 0) {
317 xfree(banner);
318 banner = NULL;
319 }
320 return (banner);
321 }
322
323 /* Inform the privileged process about service and style */
324
325 void
mm_inform_authserv(char * service,char * style)326 mm_inform_authserv(char *service, char *style)
327 {
328 Buffer m;
329
330 debug3("%s entering", __func__);
331
332 buffer_init(&m);
333 buffer_put_cstring(&m, service);
334 buffer_put_cstring(&m, style ? style : "");
335
336 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
337
338 buffer_free(&m);
339 }
340
341 /* Do the password authentication */
342 int
mm_auth_password(Authctxt * authctxt,char * password)343 mm_auth_password(Authctxt *authctxt, char *password)
344 {
345 Buffer m;
346 int authenticated = 0;
347
348 debug3("%s entering", __func__);
349
350 buffer_init(&m);
351 buffer_put_cstring(&m, password);
352 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
353
354 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
355 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
356
357 authenticated = buffer_get_int(&m);
358
359 buffer_free(&m);
360
361 debug3("%s: user %sauthenticated",
362 __func__, authenticated ? "" : "not ");
363 return (authenticated);
364 }
365
366 int
mm_user_key_allowed(struct passwd * pw,Key * key)367 mm_user_key_allowed(struct passwd *pw, Key *key)
368 {
369 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
370 }
371
372 int
mm_hostbased_key_allowed(struct passwd * pw,char * user,char * host,Key * key)373 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
374 Key *key)
375 {
376 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
377 }
378
379 int
mm_auth_rhosts_rsa_key_allowed(struct passwd * pw,char * user,char * host,Key * key)380 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
381 char *host, Key *key)
382 {
383 int ret;
384
385 key->type = KEY_RSA; /* XXX hack for key_to_blob */
386 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
387 key->type = KEY_RSA1;
388 return (ret);
389 }
390
391 int
mm_key_allowed(enum mm_keytype type,char * user,char * host,Key * key)392 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
393 {
394 Buffer m;
395 u_char *blob;
396 u_int len;
397 int allowed = 0, have_forced = 0;
398
399 debug3("%s entering", __func__);
400
401 /* Convert the key to a blob and the pass it over */
402 if (!key_to_blob(key, &blob, &len))
403 return (0);
404
405 buffer_init(&m);
406 buffer_put_int(&m, type);
407 buffer_put_cstring(&m, user ? user : "");
408 buffer_put_cstring(&m, host ? host : "");
409 buffer_put_string(&m, blob, len);
410 xfree(blob);
411
412 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
413
414 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
415 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
416
417 allowed = buffer_get_int(&m);
418
419 /* fake forced command */
420 auth_clear_options();
421 have_forced = buffer_get_int(&m);
422 forced_command = have_forced ? xstrdup("true") : NULL;
423
424 buffer_free(&m);
425
426 return (allowed);
427 }
428
429 /*
430 * This key verify needs to send the key type along, because the
431 * privileged parent makes the decision if the key is allowed
432 * for authentication.
433 */
434
435 int
mm_key_verify(Key * key,u_char * sig,u_int siglen,u_char * data,u_int datalen)436 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
437 {
438 Buffer m;
439 u_char *blob;
440 u_int len;
441 int verified = 0;
442
443 debug3("%s entering", __func__);
444
445 /* Convert the key to a blob and the pass it over */
446 if (!key_to_blob(key, &blob, &len))
447 return (0);
448
449 buffer_init(&m);
450 buffer_put_string(&m, blob, len);
451 buffer_put_string(&m, sig, siglen);
452 buffer_put_string(&m, data, datalen);
453 xfree(blob);
454
455 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
456
457 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
458 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
459
460 verified = buffer_get_int(&m);
461
462 buffer_free(&m);
463
464 return (verified);
465 }
466
467 /* Export key state after authentication */
468 Newkeys *
mm_newkeys_from_blob(u_char * blob,int blen)469 mm_newkeys_from_blob(u_char *blob, int blen)
470 {
471 Buffer b;
472 u_int len;
473 Newkeys *newkey = NULL;
474 Enc *enc;
475 Mac *mac;
476 Comp *comp;
477
478 debug3("%s: %p(%d)", __func__, blob, blen);
479 #ifdef DEBUG_PK
480 dump_base64(stderr, blob, blen);
481 #endif
482 buffer_init(&b);
483 buffer_append(&b, blob, blen);
484
485 newkey = xmalloc(sizeof(*newkey));
486 enc = &newkey->enc;
487 mac = &newkey->mac;
488 comp = &newkey->comp;
489
490 /* Enc structure */
491 enc->name = buffer_get_string(&b, NULL);
492 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
493 enc->enabled = buffer_get_int(&b);
494 enc->block_size = buffer_get_int(&b);
495 enc->key = buffer_get_string(&b, &enc->key_len);
496 enc->iv = buffer_get_string(&b, &len);
497 if (len != enc->block_size)
498 fatal("%s: bad ivlen: expected %u != %u", __func__,
499 enc->block_size, len);
500
501 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
502 fatal("%s: bad cipher name %s or pointer %p", __func__,
503 enc->name, enc->cipher);
504
505 /* Mac structure */
506 mac->name = buffer_get_string(&b, NULL);
507 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
508 fatal("%s: can not setup mac %s", __func__, mac->name);
509 mac->enabled = buffer_get_int(&b);
510 mac->key = buffer_get_string(&b, &len);
511 if (len > mac->key_len)
512 fatal("%s: bad mac key length: %u > %d", __func__, len,
513 mac->key_len);
514 mac->key_len = len;
515
516 /* Comp structure */
517 comp->type = buffer_get_int(&b);
518 comp->enabled = buffer_get_int(&b);
519 comp->name = buffer_get_string(&b, NULL);
520
521 len = buffer_len(&b);
522 if (len != 0)
523 error("newkeys_from_blob: remaining bytes in blob %u", len);
524 buffer_free(&b);
525 return (newkey);
526 }
527
528 int
mm_newkeys_to_blob(int mode,u_char ** blobp,u_int * lenp)529 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
530 {
531 Buffer b;
532 int len;
533 Enc *enc;
534 Mac *mac;
535 Comp *comp;
536 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
537
538 debug3("%s: converting %p", __func__, newkey);
539
540 if (newkey == NULL) {
541 error("%s: newkey == NULL", __func__);
542 return 0;
543 }
544 enc = &newkey->enc;
545 mac = &newkey->mac;
546 comp = &newkey->comp;
547
548 buffer_init(&b);
549 /* Enc structure */
550 buffer_put_cstring(&b, enc->name);
551 /* The cipher struct is constant and shared, you export pointer */
552 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
553 buffer_put_int(&b, enc->enabled);
554 buffer_put_int(&b, enc->block_size);
555 buffer_put_string(&b, enc->key, enc->key_len);
556 packet_get_keyiv(mode, enc->iv, enc->block_size);
557 buffer_put_string(&b, enc->iv, enc->block_size);
558
559 /* Mac structure */
560 buffer_put_cstring(&b, mac->name);
561 buffer_put_int(&b, mac->enabled);
562 buffer_put_string(&b, mac->key, mac->key_len);
563
564 /* Comp structure */
565 buffer_put_int(&b, comp->type);
566 buffer_put_int(&b, comp->enabled);
567 buffer_put_cstring(&b, comp->name);
568
569 len = buffer_len(&b);
570 if (lenp != NULL)
571 *lenp = len;
572 if (blobp != NULL) {
573 *blobp = xmalloc(len);
574 memcpy(*blobp, buffer_ptr(&b), len);
575 }
576 memset(buffer_ptr(&b), 0, len);
577 buffer_free(&b);
578 return len;
579 }
580
581 static void
mm_send_kex(Buffer * m,Kex * kex)582 mm_send_kex(Buffer *m, Kex *kex)
583 {
584 buffer_put_string(m, kex->session_id, kex->session_id_len);
585 buffer_put_int(m, kex->we_need);
586 buffer_put_int(m, kex->hostkey_type);
587 buffer_put_int(m, kex->kex_type);
588 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
589 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
590 buffer_put_int(m, kex->flags);
591 buffer_put_cstring(m, kex->client_version_string);
592 buffer_put_cstring(m, kex->server_version_string);
593 }
594
595 void
mm_send_keystate(struct monitor * monitor)596 mm_send_keystate(struct monitor *monitor)
597 {
598 Buffer m, *input, *output;
599 u_char *blob, *p;
600 u_int bloblen, plen;
601 u_int32_t seqnr, packets;
602 u_int64_t blocks, bytes;
603
604 buffer_init(&m);
605
606 if (!compat20) {
607 u_char iv[24];
608 u_char *key;
609 u_int ivlen, keylen;
610
611 buffer_put_int(&m, packet_get_protocol_flags());
612
613 buffer_put_int(&m, packet_get_ssh1_cipher());
614
615 debug3("%s: Sending ssh1 KEY+IV", __func__);
616 keylen = packet_get_encryption_key(NULL);
617 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
618 keylen = packet_get_encryption_key(key);
619 buffer_put_string(&m, key, keylen);
620 memset(key, 0, keylen);
621 xfree(key);
622
623 ivlen = packet_get_keyiv_len(MODE_OUT);
624 packet_get_keyiv(MODE_OUT, iv, ivlen);
625 buffer_put_string(&m, iv, ivlen);
626 ivlen = packet_get_keyiv_len(MODE_OUT);
627 packet_get_keyiv(MODE_IN, iv, ivlen);
628 buffer_put_string(&m, iv, ivlen);
629 goto skip;
630 } else {
631 /* Kex for rekeying */
632 mm_send_kex(&m, *monitor->m_pkex);
633 }
634
635 debug3("%s: Sending new keys: %p %p",
636 __func__, packet_get_newkeys(MODE_OUT),
637 packet_get_newkeys(MODE_IN));
638
639 /* Keys from Kex */
640 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
641 fatal("%s: conversion of newkeys failed", __func__);
642
643 buffer_put_string(&m, blob, bloblen);
644 xfree(blob);
645
646 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
647 fatal("%s: conversion of newkeys failed", __func__);
648
649 buffer_put_string(&m, blob, bloblen);
650 xfree(blob);
651
652 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
653 buffer_put_int(&m, seqnr);
654 buffer_put_int64(&m, blocks);
655 buffer_put_int(&m, packets);
656 buffer_put_int64(&m, bytes);
657 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
658 buffer_put_int(&m, seqnr);
659 buffer_put_int64(&m, blocks);
660 buffer_put_int(&m, packets);
661 buffer_put_int64(&m, bytes);
662
663 debug3("%s: New keys have been sent", __func__);
664 skip:
665 /* More key context */
666 plen = packet_get_keycontext(MODE_OUT, NULL);
667 p = xmalloc(plen+1);
668 packet_get_keycontext(MODE_OUT, p);
669 buffer_put_string(&m, p, plen);
670 xfree(p);
671
672 plen = packet_get_keycontext(MODE_IN, NULL);
673 p = xmalloc(plen+1);
674 packet_get_keycontext(MODE_IN, p);
675 buffer_put_string(&m, p, plen);
676 xfree(p);
677
678 /* Compression state */
679 debug3("%s: Sending compression state", __func__);
680 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
681 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
682
683 /* Network I/O buffers */
684 input = (Buffer *)packet_get_input();
685 output = (Buffer *)packet_get_output();
686 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
687 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
688
689 /* Roaming */
690 if (compat20) {
691 buffer_put_int64(&m, get_sent_bytes());
692 buffer_put_int64(&m, get_recv_bytes());
693 }
694
695 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
696 debug3("%s: Finished sending state", __func__);
697
698 buffer_free(&m);
699 }
700
701 int
mm_pty_allocate(int * ptyfd,int * ttyfd,char * namebuf,size_t namebuflen)702 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
703 {
704 Buffer m;
705 char *p, *msg;
706 int success = 0, tmp1 = -1, tmp2 = -1;
707
708 /* Kludge: ensure there are fds free to receive the pty/tty */
709 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
710 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
711 error("%s: cannot allocate fds for pty", __func__);
712 if (tmp1 > 0)
713 close(tmp1);
714 if (tmp2 > 0)
715 close(tmp2);
716 return 0;
717 }
718 close(tmp1);
719 close(tmp2);
720
721 buffer_init(&m);
722 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
723
724 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
725 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
726
727 success = buffer_get_int(&m);
728 if (success == 0) {
729 debug3("%s: pty alloc failed", __func__);
730 buffer_free(&m);
731 return (0);
732 }
733 p = buffer_get_string(&m, NULL);
734 msg = buffer_get_string(&m, NULL);
735 buffer_free(&m);
736
737 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
738 xfree(p);
739
740 buffer_append(&loginmsg, msg, strlen(msg));
741 xfree(msg);
742
743 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
744 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
745 fatal("%s: receive fds failed", __func__);
746
747 /* Success */
748 return (1);
749 }
750
751 void
mm_session_pty_cleanup2(Session * s)752 mm_session_pty_cleanup2(Session *s)
753 {
754 Buffer m;
755
756 if (s->ttyfd == -1)
757 return;
758 buffer_init(&m);
759 buffer_put_cstring(&m, s->tty);
760 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
761 buffer_free(&m);
762
763 /* closed dup'ed master */
764 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
765 error("close(s->ptymaster/%d): %s",
766 s->ptymaster, strerror(errno));
767
768 /* unlink pty from session */
769 s->ttyfd = -1;
770 }
771
772 #ifdef USE_PAM
773 void
mm_start_pam(Authctxt * authctxt)774 mm_start_pam(Authctxt *authctxt)
775 {
776 Buffer m;
777
778 debug3("%s entering", __func__);
779 if (!options.use_pam)
780 fatal("UsePAM=no, but ended up in %s anyway", __func__);
781
782 buffer_init(&m);
783 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
784
785 buffer_free(&m);
786 }
787
788 u_int
mm_do_pam_account(void)789 mm_do_pam_account(void)
790 {
791 Buffer m;
792 u_int ret;
793 char *msg;
794
795 debug3("%s entering", __func__);
796 if (!options.use_pam)
797 fatal("UsePAM=no, but ended up in %s anyway", __func__);
798
799 buffer_init(&m);
800 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
801
802 mm_request_receive_expect(pmonitor->m_recvfd,
803 MONITOR_ANS_PAM_ACCOUNT, &m);
804 ret = buffer_get_int(&m);
805 msg = buffer_get_string(&m, NULL);
806 buffer_append(&loginmsg, msg, strlen(msg));
807 xfree(msg);
808
809 buffer_free(&m);
810
811 debug3("%s returning %d", __func__, ret);
812
813 return (ret);
814 }
815
816 void *
mm_sshpam_init_ctx(Authctxt * authctxt)817 mm_sshpam_init_ctx(Authctxt *authctxt)
818 {
819 Buffer m;
820 int success;
821
822 debug3("%s", __func__);
823 buffer_init(&m);
824 buffer_put_cstring(&m, authctxt->user);
825 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
826 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
827 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
828 success = buffer_get_int(&m);
829 if (success == 0) {
830 debug3("%s: pam_init_ctx failed", __func__);
831 buffer_free(&m);
832 return (NULL);
833 }
834 buffer_free(&m);
835 return (authctxt);
836 }
837
838 int
mm_sshpam_query(void * ctx,char ** name,char ** info,u_int * num,char *** prompts,u_int ** echo_on)839 mm_sshpam_query(void *ctx, char **name, char **info,
840 u_int *num, char ***prompts, u_int **echo_on)
841 {
842 Buffer m;
843 u_int i;
844 int ret;
845
846 debug3("%s", __func__);
847 buffer_init(&m);
848 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
849 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
850 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
851 ret = buffer_get_int(&m);
852 debug3("%s: pam_query returned %d", __func__, ret);
853 *name = buffer_get_string(&m, NULL);
854 *info = buffer_get_string(&m, NULL);
855 *num = buffer_get_int(&m);
856 if (*num > PAM_MAX_NUM_MSG)
857 fatal("%s: recieved %u PAM messages, expected <= %u",
858 __func__, *num, PAM_MAX_NUM_MSG);
859 *prompts = xcalloc((*num + 1), sizeof(char *));
860 *echo_on = xcalloc((*num + 1), sizeof(u_int));
861 for (i = 0; i < *num; ++i) {
862 (*prompts)[i] = buffer_get_string(&m, NULL);
863 (*echo_on)[i] = buffer_get_int(&m);
864 }
865 buffer_free(&m);
866 return (ret);
867 }
868
869 int
mm_sshpam_respond(void * ctx,u_int num,char ** resp)870 mm_sshpam_respond(void *ctx, u_int num, char **resp)
871 {
872 Buffer m;
873 u_int i;
874 int ret;
875
876 debug3("%s", __func__);
877 buffer_init(&m);
878 buffer_put_int(&m, num);
879 for (i = 0; i < num; ++i)
880 buffer_put_cstring(&m, resp[i]);
881 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
882 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
883 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
884 ret = buffer_get_int(&m);
885 debug3("%s: pam_respond returned %d", __func__, ret);
886 buffer_free(&m);
887 return (ret);
888 }
889
890 void
mm_sshpam_free_ctx(void * ctxtp)891 mm_sshpam_free_ctx(void *ctxtp)
892 {
893 Buffer m;
894
895 debug3("%s", __func__);
896 buffer_init(&m);
897 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
898 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
899 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
900 buffer_free(&m);
901 }
902 #endif /* USE_PAM */
903
904 /* Request process termination */
905
906 void
mm_terminate(void)907 mm_terminate(void)
908 {
909 Buffer m;
910
911 buffer_init(&m);
912 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
913 buffer_free(&m);
914 }
915
916 int
mm_ssh1_session_key(BIGNUM * num)917 mm_ssh1_session_key(BIGNUM *num)
918 {
919 int rsafail;
920 Buffer m;
921
922 buffer_init(&m);
923 buffer_put_bignum2(&m, num);
924 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
925
926 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
927
928 rsafail = buffer_get_int(&m);
929 buffer_get_bignum2(&m, num);
930
931 buffer_free(&m);
932
933 return (rsafail);
934 }
935
936 static void
mm_chall_setup(char ** name,char ** infotxt,u_int * numprompts,char *** prompts,u_int ** echo_on)937 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
938 char ***prompts, u_int **echo_on)
939 {
940 *name = xstrdup("");
941 *infotxt = xstrdup("");
942 *numprompts = 1;
943 *prompts = xcalloc(*numprompts, sizeof(char *));
944 *echo_on = xcalloc(*numprompts, sizeof(u_int));
945 (*echo_on)[0] = 0;
946 }
947
948 int
mm_bsdauth_query(void * ctx,char ** name,char ** infotxt,u_int * numprompts,char *** prompts,u_int ** echo_on)949 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
950 u_int *numprompts, char ***prompts, u_int **echo_on)
951 {
952 Buffer m;
953 u_int success;
954 char *challenge;
955
956 debug3("%s: entering", __func__);
957
958 buffer_init(&m);
959 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
960
961 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
962 &m);
963 success = buffer_get_int(&m);
964 if (success == 0) {
965 debug3("%s: no challenge", __func__);
966 buffer_free(&m);
967 return (-1);
968 }
969
970 /* Get the challenge, and format the response */
971 challenge = buffer_get_string(&m, NULL);
972 buffer_free(&m);
973
974 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
975 (*prompts)[0] = challenge;
976
977 debug3("%s: received challenge: %s", __func__, challenge);
978
979 return (0);
980 }
981
982 int
mm_bsdauth_respond(void * ctx,u_int numresponses,char ** responses)983 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
984 {
985 Buffer m;
986 int authok;
987
988 debug3("%s: entering", __func__);
989 if (numresponses != 1)
990 return (-1);
991
992 buffer_init(&m);
993 buffer_put_cstring(&m, responses[0]);
994 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
995
996 mm_request_receive_expect(pmonitor->m_recvfd,
997 MONITOR_ANS_BSDAUTHRESPOND, &m);
998
999 authok = buffer_get_int(&m);
1000 buffer_free(&m);
1001
1002 return ((authok == 0) ? -1 : 0);
1003 }
1004
1005 #ifdef SKEY
1006 int
mm_skey_query(void * ctx,char ** name,char ** infotxt,u_int * numprompts,char *** prompts,u_int ** echo_on)1007 mm_skey_query(void *ctx, char **name, char **infotxt,
1008 u_int *numprompts, char ***prompts, u_int **echo_on)
1009 {
1010 Buffer m;
1011 u_int success;
1012 char *challenge;
1013
1014 debug3("%s: entering", __func__);
1015
1016 buffer_init(&m);
1017 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
1018
1019 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
1020 &m);
1021 success = buffer_get_int(&m);
1022 if (success == 0) {
1023 debug3("%s: no challenge", __func__);
1024 buffer_free(&m);
1025 return (-1);
1026 }
1027
1028 /* Get the challenge, and format the response */
1029 challenge = buffer_get_string(&m, NULL);
1030 buffer_free(&m);
1031
1032 debug3("%s: received challenge: %s", __func__, challenge);
1033
1034 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1035
1036 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1037 xfree(challenge);
1038
1039 return (0);
1040 }
1041
1042 int
mm_skey_respond(void * ctx,u_int numresponses,char ** responses)1043 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1044 {
1045 Buffer m;
1046 int authok;
1047
1048 debug3("%s: entering", __func__);
1049 if (numresponses != 1)
1050 return (-1);
1051
1052 buffer_init(&m);
1053 buffer_put_cstring(&m, responses[0]);
1054 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1055
1056 mm_request_receive_expect(pmonitor->m_recvfd,
1057 MONITOR_ANS_SKEYRESPOND, &m);
1058
1059 authok = buffer_get_int(&m);
1060 buffer_free(&m);
1061
1062 return ((authok == 0) ? -1 : 0);
1063 }
1064 #endif /* SKEY */
1065
1066 void
mm_ssh1_session_id(u_char session_id[16])1067 mm_ssh1_session_id(u_char session_id[16])
1068 {
1069 Buffer m;
1070 int i;
1071
1072 debug3("%s entering", __func__);
1073
1074 buffer_init(&m);
1075 for (i = 0; i < 16; i++)
1076 buffer_put_char(&m, session_id[i]);
1077
1078 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1079 buffer_free(&m);
1080 }
1081
1082 int
mm_auth_rsa_key_allowed(struct passwd * pw,BIGNUM * client_n,Key ** rkey)1083 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1084 {
1085 Buffer m;
1086 Key *key;
1087 u_char *blob;
1088 u_int blen;
1089 int allowed = 0, have_forced = 0;
1090
1091 debug3("%s entering", __func__);
1092
1093 buffer_init(&m);
1094 buffer_put_bignum2(&m, client_n);
1095
1096 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1097 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1098
1099 allowed = buffer_get_int(&m);
1100
1101 /* fake forced command */
1102 auth_clear_options();
1103 have_forced = buffer_get_int(&m);
1104 forced_command = have_forced ? xstrdup("true") : NULL;
1105
1106 if (allowed && rkey != NULL) {
1107 blob = buffer_get_string(&m, &blen);
1108 if ((key = key_from_blob(blob, blen)) == NULL)
1109 fatal("%s: key_from_blob failed", __func__);
1110 *rkey = key;
1111 xfree(blob);
1112 }
1113 buffer_free(&m);
1114
1115 return (allowed);
1116 }
1117
1118 BIGNUM *
mm_auth_rsa_generate_challenge(Key * key)1119 mm_auth_rsa_generate_challenge(Key *key)
1120 {
1121 Buffer m;
1122 BIGNUM *challenge;
1123 u_char *blob;
1124 u_int blen;
1125
1126 debug3("%s entering", __func__);
1127
1128 if ((challenge = BN_new()) == NULL)
1129 fatal("%s: BN_new failed", __func__);
1130
1131 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1132 if (key_to_blob(key, &blob, &blen) == 0)
1133 fatal("%s: key_to_blob failed", __func__);
1134 key->type = KEY_RSA1;
1135
1136 buffer_init(&m);
1137 buffer_put_string(&m, blob, blen);
1138 xfree(blob);
1139
1140 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1141 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1142
1143 buffer_get_bignum2(&m, challenge);
1144 buffer_free(&m);
1145
1146 return (challenge);
1147 }
1148
1149 int
mm_auth_rsa_verify_response(Key * key,BIGNUM * p,u_char response[16])1150 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1151 {
1152 Buffer m;
1153 u_char *blob;
1154 u_int blen;
1155 int success = 0;
1156
1157 debug3("%s entering", __func__);
1158
1159 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1160 if (key_to_blob(key, &blob, &blen) == 0)
1161 fatal("%s: key_to_blob failed", __func__);
1162 key->type = KEY_RSA1;
1163
1164 buffer_init(&m);
1165 buffer_put_string(&m, blob, blen);
1166 buffer_put_string(&m, response, 16);
1167 xfree(blob);
1168
1169 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1170 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1171
1172 success = buffer_get_int(&m);
1173 buffer_free(&m);
1174
1175 return (success);
1176 }
1177
1178 #ifdef SSH_AUDIT_EVENTS
1179 void
mm_audit_event(ssh_audit_event_t event)1180 mm_audit_event(ssh_audit_event_t event)
1181 {
1182 Buffer m;
1183
1184 debug3("%s entering", __func__);
1185
1186 buffer_init(&m);
1187 buffer_put_int(&m, event);
1188
1189 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1190 buffer_free(&m);
1191 }
1192
1193 void
mm_audit_run_command(const char * command)1194 mm_audit_run_command(const char *command)
1195 {
1196 Buffer m;
1197
1198 debug3("%s entering command %s", __func__, command);
1199
1200 buffer_init(&m);
1201 buffer_put_cstring(&m, command);
1202
1203 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1204 buffer_free(&m);
1205 }
1206 #endif /* SSH_AUDIT_EVENTS */
1207
1208 #ifdef GSSAPI
1209 OM_uint32
mm_ssh_gssapi_server_ctx(Gssctxt ** ctx,gss_OID goid)1210 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1211 {
1212 Buffer m;
1213 OM_uint32 major;
1214
1215 /* Client doesn't get to see the context */
1216 *ctx = NULL;
1217
1218 buffer_init(&m);
1219 buffer_put_string(&m, goid->elements, goid->length);
1220
1221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1222 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1223
1224 major = buffer_get_int(&m);
1225
1226 buffer_free(&m);
1227 return (major);
1228 }
1229
1230 OM_uint32
mm_ssh_gssapi_accept_ctx(Gssctxt * ctx,gss_buffer_desc * in,gss_buffer_desc * out,OM_uint32 * flags)1231 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1232 gss_buffer_desc *out, OM_uint32 *flags)
1233 {
1234 Buffer m;
1235 OM_uint32 major;
1236 u_int len;
1237
1238 buffer_init(&m);
1239 buffer_put_string(&m, in->value, in->length);
1240
1241 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1242 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1243
1244 major = buffer_get_int(&m);
1245 out->value = buffer_get_string(&m, &len);
1246 out->length = len;
1247 if (flags)
1248 *flags = buffer_get_int(&m);
1249
1250 buffer_free(&m);
1251
1252 return (major);
1253 }
1254
1255 OM_uint32
mm_ssh_gssapi_checkmic(Gssctxt * ctx,gss_buffer_t gssbuf,gss_buffer_t gssmic)1256 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1257 {
1258 Buffer m;
1259 OM_uint32 major;
1260
1261 buffer_init(&m);
1262 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1263 buffer_put_string(&m, gssmic->value, gssmic->length);
1264
1265 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1266 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1267 &m);
1268
1269 major = buffer_get_int(&m);
1270 buffer_free(&m);
1271 return(major);
1272 }
1273
1274 int
mm_ssh_gssapi_userok(char * user)1275 mm_ssh_gssapi_userok(char *user)
1276 {
1277 Buffer m;
1278 int authenticated = 0;
1279
1280 buffer_init(&m);
1281
1282 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1283 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1284 &m);
1285
1286 authenticated = buffer_get_int(&m);
1287
1288 buffer_free(&m);
1289 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1290 return (authenticated);
1291 }
1292 #endif /* GSSAPI */
1293
1294 #ifdef JPAKE
1295 void
mm_auth2_jpake_get_pwdata(Authctxt * authctxt,BIGNUM ** s,char ** hash_scheme,char ** salt)1296 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1297 char **hash_scheme, char **salt)
1298 {
1299 Buffer m;
1300
1301 debug3("%s entering", __func__);
1302
1303 buffer_init(&m);
1304 mm_request_send(pmonitor->m_recvfd,
1305 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1306
1307 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1308 mm_request_receive_expect(pmonitor->m_recvfd,
1309 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1310
1311 *hash_scheme = buffer_get_string(&m, NULL);
1312 *salt = buffer_get_string(&m, NULL);
1313
1314 buffer_free(&m);
1315 }
1316
1317 void
mm_jpake_step1(struct modp_group * grp,u_char ** id,u_int * id_len,BIGNUM ** priv1,BIGNUM ** priv2,BIGNUM ** g_priv1,BIGNUM ** g_priv2,u_char ** priv1_proof,u_int * priv1_proof_len,u_char ** priv2_proof,u_int * priv2_proof_len)1318 mm_jpake_step1(struct modp_group *grp,
1319 u_char **id, u_int *id_len,
1320 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1321 u_char **priv1_proof, u_int *priv1_proof_len,
1322 u_char **priv2_proof, u_int *priv2_proof_len)
1323 {
1324 Buffer m;
1325
1326 debug3("%s entering", __func__);
1327
1328 buffer_init(&m);
1329 mm_request_send(pmonitor->m_recvfd,
1330 MONITOR_REQ_JPAKE_STEP1, &m);
1331
1332 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1333 mm_request_receive_expect(pmonitor->m_recvfd,
1334 MONITOR_ANS_JPAKE_STEP1, &m);
1335
1336 if ((*priv1 = BN_new()) == NULL ||
1337 (*priv2 = BN_new()) == NULL ||
1338 (*g_priv1 = BN_new()) == NULL ||
1339 (*g_priv2 = BN_new()) == NULL)
1340 fatal("%s: BN_new", __func__);
1341
1342 *id = buffer_get_string(&m, id_len);
1343 /* priv1 and priv2 are, well, private */
1344 buffer_get_bignum2(&m, *g_priv1);
1345 buffer_get_bignum2(&m, *g_priv2);
1346 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1347 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1348
1349 buffer_free(&m);
1350 }
1351
1352 void
mm_jpake_step2(struct modp_group * grp,BIGNUM * s,BIGNUM * mypub1,BIGNUM * theirpub1,BIGNUM * theirpub2,BIGNUM * mypriv2,const u_char * theirid,u_int theirid_len,const u_char * myid,u_int myid_len,const u_char * theirpub1_proof,u_int theirpub1_proof_len,const u_char * theirpub2_proof,u_int theirpub2_proof_len,BIGNUM ** newpub,u_char ** newpub_exponent_proof,u_int * newpub_exponent_proof_len)1353 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1354 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1355 const u_char *theirid, u_int theirid_len,
1356 const u_char *myid, u_int myid_len,
1357 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1358 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1359 BIGNUM **newpub,
1360 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1361 {
1362 Buffer m;
1363
1364 debug3("%s entering", __func__);
1365
1366 buffer_init(&m);
1367 /* monitor already has all bignums except theirpub1, theirpub2 */
1368 buffer_put_bignum2(&m, theirpub1);
1369 buffer_put_bignum2(&m, theirpub2);
1370 /* monitor already knows our id */
1371 buffer_put_string(&m, theirid, theirid_len);
1372 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1373 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1374
1375 mm_request_send(pmonitor->m_recvfd,
1376 MONITOR_REQ_JPAKE_STEP2, &m);
1377
1378 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1379 mm_request_receive_expect(pmonitor->m_recvfd,
1380 MONITOR_ANS_JPAKE_STEP2, &m);
1381
1382 if ((*newpub = BN_new()) == NULL)
1383 fatal("%s: BN_new", __func__);
1384
1385 buffer_get_bignum2(&m, *newpub);
1386 *newpub_exponent_proof = buffer_get_string(&m,
1387 newpub_exponent_proof_len);
1388
1389 buffer_free(&m);
1390 }
1391
1392 void
mm_jpake_key_confirm(struct modp_group * grp,BIGNUM * s,BIGNUM * step2_val,BIGNUM * mypriv2,BIGNUM * mypub1,BIGNUM * mypub2,BIGNUM * theirpub1,BIGNUM * theirpub2,const u_char * my_id,u_int my_id_len,const u_char * their_id,u_int their_id_len,const u_char * sess_id,u_int sess_id_len,const u_char * theirpriv2_s_proof,u_int theirpriv2_s_proof_len,BIGNUM ** k,u_char ** confirm_hash,u_int * confirm_hash_len)1393 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1394 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1395 BIGNUM *theirpub1, BIGNUM *theirpub2,
1396 const u_char *my_id, u_int my_id_len,
1397 const u_char *their_id, u_int their_id_len,
1398 const u_char *sess_id, u_int sess_id_len,
1399 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1400 BIGNUM **k,
1401 u_char **confirm_hash, u_int *confirm_hash_len)
1402 {
1403 Buffer m;
1404
1405 debug3("%s entering", __func__);
1406
1407 buffer_init(&m);
1408 /* monitor already has all bignums except step2_val */
1409 buffer_put_bignum2(&m, step2_val);
1410 /* monitor already knows all the ids */
1411 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1412
1413 mm_request_send(pmonitor->m_recvfd,
1414 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1415
1416 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1417 mm_request_receive_expect(pmonitor->m_recvfd,
1418 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1419
1420 /* 'k' is sensitive and stays in the monitor */
1421 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1422
1423 buffer_free(&m);
1424 }
1425
1426 int
mm_jpake_check_confirm(const BIGNUM * k,const u_char * peer_id,u_int peer_id_len,const u_char * sess_id,u_int sess_id_len,const u_char * peer_confirm_hash,u_int peer_confirm_hash_len)1427 mm_jpake_check_confirm(const BIGNUM *k,
1428 const u_char *peer_id, u_int peer_id_len,
1429 const u_char *sess_id, u_int sess_id_len,
1430 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1431 {
1432 Buffer m;
1433 int success = 0;
1434
1435 debug3("%s entering", __func__);
1436
1437 buffer_init(&m);
1438 /* k is dummy in slave, ignored */
1439 /* monitor knows all the ids */
1440 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1441 mm_request_send(pmonitor->m_recvfd,
1442 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1443
1444 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1445 mm_request_receive_expect(pmonitor->m_recvfd,
1446 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1447
1448 success = buffer_get_int(&m);
1449 buffer_free(&m);
1450
1451 debug3("%s: success = %d", __func__, success);
1452 return success;
1453 }
1454 #endif /* JPAKE */
1455