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Diffstat (limited to 'monitor_wrap.c')
-rw-r--r-- | monitor_wrap.c | 894 |
1 files changed, 894 insertions, 0 deletions
diff --git a/monitor_wrap.c b/monitor_wrap.c new file mode 100644 index 000000000..e477cff25 --- /dev/null +++ b/monitor_wrap.c | |||
@@ -0,0 +1,894 @@ | |||
1 | /* | ||
2 | * Copyright 2002 Niels Provos <provos@citi.umich.edu> | ||
3 | * Copyright 2002 Markus Friedl <markus@openbsd.org> | ||
4 | * All rights reserved. | ||
5 | * | ||
6 | * Redistribution and use in source and binary forms, with or without | ||
7 | * modification, are permitted provided that the following conditions | ||
8 | * are met: | ||
9 | * 1. Redistributions of source code must retain the above copyright | ||
10 | * notice, this list of conditions and the following disclaimer. | ||
11 | * 2. Redistributions in binary form must reproduce the above copyright | ||
12 | * notice, this list of conditions and the following disclaimer in the | ||
13 | * documentation and/or other materials provided with the distribution. | ||
14 | * | ||
15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | ||
16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | ||
17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | ||
18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | ||
20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | ||
24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
25 | */ | ||
26 | |||
27 | #include "includes.h" | ||
28 | RCSID("$OpenBSD: monitor_wrap.c,v 1.4 2002/03/19 14:27:39 markus Exp $"); | ||
29 | |||
30 | #include <openssl/bn.h> | ||
31 | #include <openssl/dh.h> | ||
32 | |||
33 | #include "ssh.h" | ||
34 | #include "dh.h" | ||
35 | #include "kex.h" | ||
36 | #include "auth.h" | ||
37 | #include "buffer.h" | ||
38 | #include "bufaux.h" | ||
39 | #include "packet.h" | ||
40 | #include "mac.h" | ||
41 | #include "log.h" | ||
42 | #include "zlib.h" | ||
43 | #include "monitor.h" | ||
44 | #include "monitor_wrap.h" | ||
45 | #include "xmalloc.h" | ||
46 | #include "atomicio.h" | ||
47 | #include "monitor_fdpass.h" | ||
48 | #include "getput.h" | ||
49 | |||
50 | #include "auth.h" | ||
51 | #include "channels.h" | ||
52 | #include "session.h" | ||
53 | |||
54 | /* Imports */ | ||
55 | extern int compat20; | ||
56 | extern Newkeys *newkeys[]; | ||
57 | extern z_stream incoming_stream; | ||
58 | extern z_stream outgoing_stream; | ||
59 | extern struct monitor *monitor; | ||
60 | extern Buffer input, output; | ||
61 | |||
62 | void | ||
63 | mm_request_send(int socket, enum monitor_reqtype type, Buffer *m) | ||
64 | { | ||
65 | u_char buf[5]; | ||
66 | u_int mlen = buffer_len(m); | ||
67 | |||
68 | debug3("%s entering: type %d", __FUNCTION__, type); | ||
69 | |||
70 | PUT_32BIT(buf, mlen + 1); | ||
71 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ | ||
72 | if (atomicio(write, socket, buf, sizeof(buf)) != sizeof(buf)) | ||
73 | fatal("%s: write", __FUNCTION__); | ||
74 | if (atomicio(write, socket, buffer_ptr(m), mlen) != mlen) | ||
75 | fatal("%s: write", __FUNCTION__); | ||
76 | } | ||
77 | |||
78 | void | ||
79 | mm_request_receive(int socket, Buffer *m) | ||
80 | { | ||
81 | u_char buf[4]; | ||
82 | ssize_t res; | ||
83 | u_int msg_len; | ||
84 | |||
85 | debug3("%s entering", __FUNCTION__); | ||
86 | |||
87 | res = atomicio(read, socket, buf, sizeof(buf)); | ||
88 | if (res != sizeof(buf)) { | ||
89 | if (res == 0) | ||
90 | fatal_cleanup(); | ||
91 | fatal("%s: read: %d", __FUNCTION__, res); | ||
92 | } | ||
93 | msg_len = GET_32BIT(buf); | ||
94 | if (msg_len > 256 * 1024) | ||
95 | fatal("%s: read: bad msg_len %d", __FUNCTION__, msg_len); | ||
96 | buffer_clear(m); | ||
97 | buffer_append_space(m, msg_len); | ||
98 | res = atomicio(read, socket, buffer_ptr(m), msg_len); | ||
99 | if (res != msg_len) | ||
100 | fatal("%s: read: %d != msg_len", __FUNCTION__, res); | ||
101 | } | ||
102 | |||
103 | void | ||
104 | mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m) | ||
105 | { | ||
106 | u_char rtype; | ||
107 | |||
108 | debug3("%s entering: type %d", __FUNCTION__, type); | ||
109 | |||
110 | mm_request_receive(socket, m); | ||
111 | rtype = buffer_get_char(m); | ||
112 | if (rtype != type) | ||
113 | fatal("%s: read: rtype %d != type %d", __FUNCTION__, | ||
114 | rtype, type); | ||
115 | } | ||
116 | |||
117 | DH * | ||
118 | mm_choose_dh(int min, int nbits, int max) | ||
119 | { | ||
120 | BIGNUM *p, *g; | ||
121 | int success = 0; | ||
122 | Buffer m; | ||
123 | |||
124 | buffer_init(&m); | ||
125 | buffer_put_int(&m, min); | ||
126 | buffer_put_int(&m, nbits); | ||
127 | buffer_put_int(&m, max); | ||
128 | |||
129 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_MODULI, &m); | ||
130 | |||
131 | debug3("%s: waiting for MONITOR_ANS_MODULI", __FUNCTION__); | ||
132 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_MODULI, &m); | ||
133 | |||
134 | success = buffer_get_char(&m); | ||
135 | if (success == 0) | ||
136 | fatal("%s: MONITOR_ANS_MODULI failed", __FUNCTION__); | ||
137 | |||
138 | if ((p = BN_new()) == NULL) | ||
139 | fatal("%s: BN_new failed", __FUNCTION__); | ||
140 | if ((g = BN_new()) == NULL) | ||
141 | fatal("%s: BN_new failed", __FUNCTION__); | ||
142 | buffer_get_bignum2(&m, p); | ||
143 | buffer_get_bignum2(&m, g); | ||
144 | |||
145 | debug3("%s: remaining %d", __FUNCTION__, buffer_len(&m)); | ||
146 | buffer_free(&m); | ||
147 | |||
148 | return (dh_new_group(g, p)); | ||
149 | } | ||
150 | |||
151 | int | ||
152 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | ||
153 | { | ||
154 | Kex *kex = *monitor->m_pkex; | ||
155 | Buffer m; | ||
156 | |||
157 | debug3("%s entering", __FUNCTION__); | ||
158 | |||
159 | buffer_init(&m); | ||
160 | buffer_put_int(&m, kex->host_key_index(key)); | ||
161 | buffer_put_string(&m, data, datalen); | ||
162 | |||
163 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_SIGN, &m); | ||
164 | |||
165 | debug3("%s: waiting for MONITOR_ANS_SIGN", __FUNCTION__); | ||
166 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_SIGN, &m); | ||
167 | *sigp = buffer_get_string(&m, lenp); | ||
168 | buffer_free(&m); | ||
169 | |||
170 | return (0); | ||
171 | } | ||
172 | |||
173 | struct passwd * | ||
174 | mm_getpwnamallow(const char *login) | ||
175 | { | ||
176 | Buffer m; | ||
177 | struct passwd *pw; | ||
178 | u_int pwlen; | ||
179 | |||
180 | debug3("%s entering", __FUNCTION__); | ||
181 | |||
182 | buffer_init(&m); | ||
183 | buffer_put_cstring(&m, login); | ||
184 | |||
185 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_PWNAM, &m); | ||
186 | |||
187 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __FUNCTION__); | ||
188 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_PWNAM, &m); | ||
189 | |||
190 | if (buffer_get_char(&m) == 0) { | ||
191 | buffer_free(&m); | ||
192 | return (NULL); | ||
193 | } | ||
194 | pw = buffer_get_string(&m, &pwlen); | ||
195 | if (pwlen != sizeof(struct passwd)) | ||
196 | fatal("%s: struct passwd size mismatch", __FUNCTION__); | ||
197 | pw->pw_name = buffer_get_string(&m, NULL); | ||
198 | pw->pw_passwd = buffer_get_string(&m, NULL); | ||
199 | pw->pw_gecos = buffer_get_string(&m, NULL); | ||
200 | pw->pw_class = buffer_get_string(&m, NULL); | ||
201 | pw->pw_dir = buffer_get_string(&m, NULL); | ||
202 | pw->pw_shell = buffer_get_string(&m, NULL); | ||
203 | buffer_free(&m); | ||
204 | |||
205 | return (pw); | ||
206 | } | ||
207 | |||
208 | /* Inform the privileged process about service and style */ | ||
209 | |||
210 | void | ||
211 | mm_inform_authserv(char *service, char *style) | ||
212 | { | ||
213 | Buffer m; | ||
214 | |||
215 | debug3("%s entering", __FUNCTION__); | ||
216 | |||
217 | buffer_init(&m); | ||
218 | buffer_put_cstring(&m, service); | ||
219 | buffer_put_cstring(&m, style ? style : ""); | ||
220 | |||
221 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); | ||
222 | |||
223 | buffer_free(&m); | ||
224 | } | ||
225 | |||
226 | /* Do the password authentication */ | ||
227 | int | ||
228 | mm_auth_password(Authctxt *authctxt, char *password) | ||
229 | { | ||
230 | Buffer m; | ||
231 | int authenticated = 0; | ||
232 | |||
233 | debug3("%s entering", __FUNCTION__); | ||
234 | |||
235 | buffer_init(&m); | ||
236 | buffer_put_cstring(&m, password); | ||
237 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); | ||
238 | |||
239 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __FUNCTION__); | ||
240 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); | ||
241 | |||
242 | authenticated = buffer_get_int(&m); | ||
243 | |||
244 | buffer_free(&m); | ||
245 | |||
246 | debug3("%s: user %sauthenticated", | ||
247 | __FUNCTION__, authenticated ? "" : "not "); | ||
248 | return (authenticated); | ||
249 | } | ||
250 | |||
251 | int | ||
252 | mm_user_key_allowed(struct passwd *pw, Key *key) | ||
253 | { | ||
254 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | ||
255 | } | ||
256 | |||
257 | int | ||
258 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | ||
259 | Key *key) | ||
260 | { | ||
261 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | ||
262 | } | ||
263 | |||
264 | int | ||
265 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | ||
266 | char *host, Key *key) | ||
267 | { | ||
268 | int ret; | ||
269 | |||
270 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | ||
271 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | ||
272 | key->type = KEY_RSA1; | ||
273 | return (ret); | ||
274 | } | ||
275 | |||
276 | static void | ||
277 | mm_send_debug(Buffer *m) | ||
278 | { | ||
279 | char *msg; | ||
280 | |||
281 | while (buffer_len(m)) { | ||
282 | msg = buffer_get_string(m, NULL); | ||
283 | debug3("%s: Sending debug: %s", __FUNCTION__, msg); | ||
284 | packet_send_debug("%s", msg); | ||
285 | xfree(msg); | ||
286 | } | ||
287 | } | ||
288 | |||
289 | int | ||
290 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | ||
291 | { | ||
292 | Buffer m; | ||
293 | u_char *blob; | ||
294 | u_int len; | ||
295 | int allowed = 0; | ||
296 | |||
297 | debug3("%s entering", __FUNCTION__); | ||
298 | |||
299 | /* Convert the key to a blob and the pass it over */ | ||
300 | if (!key_to_blob(key, &blob, &len)) | ||
301 | return (0); | ||
302 | |||
303 | buffer_init(&m); | ||
304 | buffer_put_int(&m, type); | ||
305 | buffer_put_cstring(&m, user ? user : ""); | ||
306 | buffer_put_cstring(&m, host ? host : ""); | ||
307 | buffer_put_string(&m, blob, len); | ||
308 | xfree(blob); | ||
309 | |||
310 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); | ||
311 | |||
312 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __FUNCTION__); | ||
313 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); | ||
314 | |||
315 | allowed = buffer_get_int(&m); | ||
316 | |||
317 | /* Send potential debug messages */ | ||
318 | mm_send_debug(&m); | ||
319 | |||
320 | buffer_free(&m); | ||
321 | |||
322 | return (allowed); | ||
323 | } | ||
324 | |||
325 | /* | ||
326 | * This key verify needs to send the key type along, because the | ||
327 | * privileged parent makes the decision if the key is allowed | ||
328 | * for authentication. | ||
329 | */ | ||
330 | |||
331 | int | ||
332 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | ||
333 | { | ||
334 | Buffer m; | ||
335 | u_char *blob; | ||
336 | u_int len; | ||
337 | int verified = 0; | ||
338 | |||
339 | debug3("%s entering", __FUNCTION__); | ||
340 | |||
341 | /* Convert the key to a blob and the pass it over */ | ||
342 | if (!key_to_blob(key, &blob, &len)) | ||
343 | return (0); | ||
344 | |||
345 | buffer_init(&m); | ||
346 | buffer_put_string(&m, blob, len); | ||
347 | buffer_put_string(&m, sig, siglen); | ||
348 | buffer_put_string(&m, data, datalen); | ||
349 | xfree(blob); | ||
350 | |||
351 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); | ||
352 | |||
353 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __FUNCTION__); | ||
354 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); | ||
355 | |||
356 | verified = buffer_get_int(&m); | ||
357 | |||
358 | buffer_free(&m); | ||
359 | |||
360 | return (verified); | ||
361 | } | ||
362 | |||
363 | /* Export key state after authentication */ | ||
364 | Newkeys * | ||
365 | mm_newkeys_from_blob(u_char *blob, int blen) | ||
366 | { | ||
367 | Buffer b; | ||
368 | u_int len; | ||
369 | Newkeys *newkey = NULL; | ||
370 | Enc *enc; | ||
371 | Mac *mac; | ||
372 | Comp *comp; | ||
373 | |||
374 | debug3("%s: %p(%d)", __FUNCTION__, blob, blen); | ||
375 | #ifdef DEBUG_PK | ||
376 | dump_base64(stderr, blob, blen); | ||
377 | #endif | ||
378 | buffer_init(&b); | ||
379 | buffer_append(&b, blob, blen); | ||
380 | |||
381 | newkey = xmalloc(sizeof(*newkey)); | ||
382 | enc = &newkey->enc; | ||
383 | mac = &newkey->mac; | ||
384 | comp = &newkey->comp; | ||
385 | |||
386 | /* Enc structure */ | ||
387 | enc->name = buffer_get_string(&b, NULL); | ||
388 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | ||
389 | enc->enabled = buffer_get_int(&b); | ||
390 | enc->block_size = buffer_get_int(&b); | ||
391 | enc->key = buffer_get_string(&b, &enc->key_len); | ||
392 | enc->iv = buffer_get_string(&b, &len); | ||
393 | if (len != enc->block_size) | ||
394 | fatal("%s: bad ivlen: expected %d != %d", __FUNCTION__, | ||
395 | enc->block_size, len); | ||
396 | |||
397 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | ||
398 | fatal("%s: bad cipher name %s or pointer %p", __FUNCTION__, | ||
399 | enc->name, enc->cipher); | ||
400 | |||
401 | /* Mac structure */ | ||
402 | mac->name = buffer_get_string(&b, NULL); | ||
403 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | ||
404 | fatal("%s: can not init mac %s", __FUNCTION__, mac->name); | ||
405 | mac->enabled = buffer_get_int(&b); | ||
406 | mac->key = buffer_get_string(&b, &len); | ||
407 | if (len > mac->key_len) | ||
408 | fatal("%s: bad mac key lenght: %d > %d", __FUNCTION__, len, | ||
409 | mac->key_len); | ||
410 | mac->key_len = len; | ||
411 | |||
412 | /* Comp structure */ | ||
413 | comp->type = buffer_get_int(&b); | ||
414 | comp->enabled = buffer_get_int(&b); | ||
415 | comp->name = buffer_get_string(&b, NULL); | ||
416 | |||
417 | len = buffer_len(&b); | ||
418 | if (len != 0) | ||
419 | error("newkeys_from_blob: remaining bytes in blob %d", len); | ||
420 | buffer_free(&b); | ||
421 | return (newkey); | ||
422 | } | ||
423 | |||
424 | int | ||
425 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | ||
426 | { | ||
427 | Buffer b; | ||
428 | int len; | ||
429 | u_char *buf; | ||
430 | Enc *enc; | ||
431 | Mac *mac; | ||
432 | Comp *comp; | ||
433 | Newkeys *newkey = newkeys[mode]; | ||
434 | |||
435 | debug3("%s: converting %p", __FUNCTION__, newkey); | ||
436 | |||
437 | if (newkey == NULL) { | ||
438 | error("%s: newkey == NULL", __FUNCTION__); | ||
439 | return 0; | ||
440 | } | ||
441 | enc = &newkey->enc; | ||
442 | mac = &newkey->mac; | ||
443 | comp = &newkey->comp; | ||
444 | |||
445 | buffer_init(&b); | ||
446 | /* Enc structure */ | ||
447 | buffer_put_cstring(&b, enc->name); | ||
448 | /* The cipher struct is constant and shared, you export pointer */ | ||
449 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | ||
450 | buffer_put_int(&b, enc->enabled); | ||
451 | buffer_put_int(&b, enc->block_size); | ||
452 | buffer_put_string(&b, enc->key, enc->key_len); | ||
453 | packet_get_keyiv(mode, enc->iv, enc->block_size); | ||
454 | buffer_put_string(&b, enc->iv, enc->block_size); | ||
455 | |||
456 | /* Mac structure */ | ||
457 | buffer_put_cstring(&b, mac->name); | ||
458 | buffer_put_int(&b, mac->enabled); | ||
459 | buffer_put_string(&b, mac->key, mac->key_len); | ||
460 | |||
461 | /* Comp structure */ | ||
462 | buffer_put_int(&b, comp->type); | ||
463 | buffer_put_int(&b, comp->enabled); | ||
464 | buffer_put_cstring(&b, comp->name); | ||
465 | |||
466 | len = buffer_len(&b); | ||
467 | buf = xmalloc(len); | ||
468 | memcpy(buf, buffer_ptr(&b), len); | ||
469 | memset(buffer_ptr(&b), 0, len); | ||
470 | buffer_free(&b); | ||
471 | if (lenp != NULL) | ||
472 | *lenp = len; | ||
473 | if (blobp != NULL) | ||
474 | *blobp = buf; | ||
475 | return len; | ||
476 | } | ||
477 | |||
478 | static void | ||
479 | mm_send_kex(Buffer *m, Kex *kex) | ||
480 | { | ||
481 | buffer_put_string(m, kex->session_id, kex->session_id_len); | ||
482 | buffer_put_int(m, kex->we_need); | ||
483 | buffer_put_int(m, kex->hostkey_type); | ||
484 | buffer_put_int(m, kex->kex_type); | ||
485 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | ||
486 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | ||
487 | buffer_put_int(m, kex->flags); | ||
488 | buffer_put_cstring(m, kex->client_version_string); | ||
489 | buffer_put_cstring(m, kex->server_version_string); | ||
490 | } | ||
491 | |||
492 | void | ||
493 | mm_send_keystate(struct monitor *monitor) | ||
494 | { | ||
495 | Buffer m; | ||
496 | u_char *blob, *p; | ||
497 | u_int bloblen, plen; | ||
498 | |||
499 | buffer_init(&m); | ||
500 | |||
501 | if (!compat20) { | ||
502 | u_char iv[24]; | ||
503 | int ivlen; | ||
504 | |||
505 | buffer_put_int(&m, packet_get_protocol_flags()); | ||
506 | |||
507 | buffer_put_int(&m, packet_get_ssh1_cipher()); | ||
508 | |||
509 | debug3("%s: Sending ssh1 IV", __FUNCTION__); | ||
510 | ivlen = packet_get_keyiv_len(MODE_OUT); | ||
511 | packet_get_keyiv(MODE_OUT, iv, ivlen); | ||
512 | buffer_put_string(&m, iv, ivlen); | ||
513 | ivlen = packet_get_keyiv_len(MODE_OUT); | ||
514 | packet_get_keyiv(MODE_IN, iv, ivlen); | ||
515 | buffer_put_string(&m, iv, ivlen); | ||
516 | goto skip; | ||
517 | } else { | ||
518 | /* Kex for rekeying */ | ||
519 | mm_send_kex(&m, *monitor->m_pkex); | ||
520 | } | ||
521 | |||
522 | debug3("%s: Sending new keys: %p %p", | ||
523 | __FUNCTION__, newkeys[MODE_OUT], newkeys[MODE_IN]); | ||
524 | |||
525 | /* Keys from Kex */ | ||
526 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | ||
527 | fatal("%s: conversion of newkeys failed", __FUNCTION__); | ||
528 | |||
529 | buffer_put_string(&m, blob, bloblen); | ||
530 | xfree(blob); | ||
531 | |||
532 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | ||
533 | fatal("%s: conversion of newkeys failed", __FUNCTION__); | ||
534 | |||
535 | buffer_put_string(&m, blob, bloblen); | ||
536 | xfree(blob); | ||
537 | |||
538 | buffer_put_int(&m, packet_get_seqnr(MODE_OUT)); | ||
539 | buffer_put_int(&m, packet_get_seqnr(MODE_IN)); | ||
540 | |||
541 | debug3("%s: New keys have been sent", __FUNCTION__); | ||
542 | skip: | ||
543 | /* More key context */ | ||
544 | plen = packet_get_keycontext(MODE_OUT, NULL); | ||
545 | p = xmalloc(plen+1); | ||
546 | packet_get_keycontext(MODE_OUT, p); | ||
547 | buffer_put_string(&m, p, plen); | ||
548 | xfree(p); | ||
549 | |||
550 | plen = packet_get_keycontext(MODE_IN, NULL); | ||
551 | p = xmalloc(plen+1); | ||
552 | packet_get_keycontext(MODE_IN, p); | ||
553 | buffer_put_string(&m, p, plen); | ||
554 | xfree(p); | ||
555 | |||
556 | /* Compression state */ | ||
557 | debug3("%s: Sending compression state", __FUNCTION__); | ||
558 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); | ||
559 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | ||
560 | |||
561 | /* Network I/O buffers */ | ||
562 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | ||
563 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | ||
564 | |||
565 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); | ||
566 | debug3("%s: Finished sending state", __FUNCTION__); | ||
567 | |||
568 | buffer_free(&m); | ||
569 | } | ||
570 | |||
571 | int | ||
572 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) | ||
573 | { | ||
574 | Buffer m; | ||
575 | u_char *p; | ||
576 | int success = 0; | ||
577 | |||
578 | buffer_init(&m); | ||
579 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_PTY, &m); | ||
580 | |||
581 | debug3("%s: waiting for MONITOR_ANS_PTY", __FUNCTION__); | ||
582 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_PTY, &m); | ||
583 | |||
584 | success = buffer_get_int(&m); | ||
585 | if (success == 0) { | ||
586 | debug3("%s: pty alloc failed", __FUNCTION__); | ||
587 | buffer_free(&m); | ||
588 | return (0); | ||
589 | } | ||
590 | p = buffer_get_string(&m, NULL); | ||
591 | buffer_free(&m); | ||
592 | |||
593 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | ||
594 | xfree(p); | ||
595 | |||
596 | *ptyfd = mm_receive_fd(monitor->m_recvfd); | ||
597 | *ttyfd = mm_receive_fd(monitor->m_recvfd); | ||
598 | |||
599 | /* Success */ | ||
600 | return (1); | ||
601 | } | ||
602 | |||
603 | void | ||
604 | mm_session_pty_cleanup2(void *session) | ||
605 | { | ||
606 | Session *s = session; | ||
607 | Buffer m; | ||
608 | |||
609 | if (s->ttyfd == -1) | ||
610 | return; | ||
611 | buffer_init(&m); | ||
612 | buffer_put_cstring(&m, s->tty); | ||
613 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); | ||
614 | buffer_free(&m); | ||
615 | |||
616 | /* closed dup'ed master */ | ||
617 | if (close(s->ptymaster) < 0) | ||
618 | error("close(s->ptymaster): %s", strerror(errno)); | ||
619 | |||
620 | /* unlink pty from session */ | ||
621 | s->ttyfd = -1; | ||
622 | } | ||
623 | |||
624 | /* Request process termination */ | ||
625 | |||
626 | void | ||
627 | mm_terminate(void) | ||
628 | { | ||
629 | Buffer m; | ||
630 | |||
631 | buffer_init(&m); | ||
632 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_TERM, &m); | ||
633 | buffer_free(&m); | ||
634 | } | ||
635 | |||
636 | int | ||
637 | mm_ssh1_session_key(BIGNUM *num) | ||
638 | { | ||
639 | int rsafail; | ||
640 | Buffer m; | ||
641 | |||
642 | buffer_init(&m); | ||
643 | buffer_put_bignum2(&m, num); | ||
644 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); | ||
645 | |||
646 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); | ||
647 | |||
648 | rsafail = buffer_get_int(&m); | ||
649 | buffer_get_bignum2(&m, num); | ||
650 | |||
651 | buffer_free(&m); | ||
652 | |||
653 | return (rsafail); | ||
654 | } | ||
655 | |||
656 | static void | ||
657 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | ||
658 | char ***prompts, u_int **echo_on) | ||
659 | { | ||
660 | *name = xstrdup(""); | ||
661 | *infotxt = xstrdup(""); | ||
662 | *numprompts = 1; | ||
663 | *prompts = xmalloc(*numprompts * sizeof(char*)); | ||
664 | *echo_on = xmalloc(*numprompts * sizeof(u_int)); | ||
665 | (*echo_on)[0] = 0; | ||
666 | } | ||
667 | |||
668 | int | ||
669 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | ||
670 | u_int *numprompts, char ***prompts, u_int **echo_on) | ||
671 | { | ||
672 | Buffer m; | ||
673 | int res; | ||
674 | char *challenge; | ||
675 | |||
676 | debug3("%s: entering", __FUNCTION__); | ||
677 | |||
678 | buffer_init(&m); | ||
679 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); | ||
680 | |||
681 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, | ||
682 | &m); | ||
683 | res = buffer_get_int(&m); | ||
684 | if (res == -1) { | ||
685 | debug3("%s: no challenge", __FUNCTION__); | ||
686 | buffer_free(&m); | ||
687 | return (-1); | ||
688 | } | ||
689 | |||
690 | /* Get the challenge, and format the response */ | ||
691 | challenge = buffer_get_string(&m, NULL); | ||
692 | buffer_free(&m); | ||
693 | |||
694 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | ||
695 | (*prompts)[0] = challenge; | ||
696 | |||
697 | debug3("%s: received challenge: %s", __FUNCTION__, challenge); | ||
698 | |||
699 | return (0); | ||
700 | } | ||
701 | |||
702 | int | ||
703 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | ||
704 | { | ||
705 | Buffer m; | ||
706 | int authok; | ||
707 | |||
708 | debug3("%s: entering", __FUNCTION__); | ||
709 | if (numresponses != 1) | ||
710 | return (-1); | ||
711 | |||
712 | buffer_init(&m); | ||
713 | buffer_put_cstring(&m, responses[0]); | ||
714 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); | ||
715 | |||
716 | mm_request_receive_expect(monitor->m_recvfd, | ||
717 | MONITOR_ANS_BSDAUTHRESPOND, &m); | ||
718 | |||
719 | authok = buffer_get_int(&m); | ||
720 | buffer_free(&m); | ||
721 | |||
722 | return ((authok == 0) ? -1 : 0); | ||
723 | } | ||
724 | |||
725 | int | ||
726 | mm_skey_query(void *ctx, char **name, char **infotxt, | ||
727 | u_int *numprompts, char ***prompts, u_int **echo_on) | ||
728 | { | ||
729 | Buffer m; | ||
730 | int len, res; | ||
731 | char *p, *challenge; | ||
732 | |||
733 | debug3("%s: entering", __FUNCTION__); | ||
734 | |||
735 | buffer_init(&m); | ||
736 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); | ||
737 | |||
738 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_SKEYQUERY, | ||
739 | &m); | ||
740 | res = buffer_get_int(&m); | ||
741 | if (res == -1) { | ||
742 | debug3("%s: no challenge", __FUNCTION__); | ||
743 | buffer_free(&m); | ||
744 | return (-1); | ||
745 | } | ||
746 | |||
747 | /* Get the challenge, and format the response */ | ||
748 | challenge = buffer_get_string(&m, NULL); | ||
749 | buffer_free(&m); | ||
750 | |||
751 | debug3("%s: received challenge: %s", __FUNCTION__, challenge); | ||
752 | |||
753 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | ||
754 | |||
755 | len = strlen(challenge) + strlen(SKEY_PROMPT) + 1; | ||
756 | p = xmalloc(len); | ||
757 | strlcpy(p, challenge, len); | ||
758 | strlcat(p, SKEY_PROMPT, len); | ||
759 | (*prompts)[0] = p; | ||
760 | xfree(challenge); | ||
761 | |||
762 | return (0); | ||
763 | } | ||
764 | |||
765 | int | ||
766 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | ||
767 | { | ||
768 | Buffer m; | ||
769 | int authok; | ||
770 | |||
771 | debug3("%s: entering", __FUNCTION__); | ||
772 | if (numresponses != 1) | ||
773 | return (-1); | ||
774 | |||
775 | buffer_init(&m); | ||
776 | buffer_put_cstring(&m, responses[0]); | ||
777 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); | ||
778 | |||
779 | mm_request_receive_expect(monitor->m_recvfd, | ||
780 | MONITOR_ANS_SKEYRESPOND, &m); | ||
781 | |||
782 | authok = buffer_get_int(&m); | ||
783 | buffer_free(&m); | ||
784 | |||
785 | return ((authok == 0) ? -1 : 0); | ||
786 | } | ||
787 | |||
788 | void | ||
789 | mm_ssh1_session_id(u_char session_id[16]) | ||
790 | { | ||
791 | Buffer m; | ||
792 | int i; | ||
793 | |||
794 | debug3("%s entering", __FUNCTION__); | ||
795 | |||
796 | buffer_init(&m); | ||
797 | for (i = 0; i < 16; i++) | ||
798 | buffer_put_char(&m, session_id[i]); | ||
799 | |||
800 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_SESSID, &m); | ||
801 | buffer_free(&m); | ||
802 | } | ||
803 | |||
804 | int | ||
805 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | ||
806 | { | ||
807 | Buffer m; | ||
808 | Key *key; | ||
809 | u_char *blob; | ||
810 | u_int blen; | ||
811 | int allowed = 0; | ||
812 | |||
813 | debug3("%s entering", __FUNCTION__); | ||
814 | |||
815 | buffer_init(&m); | ||
816 | buffer_put_bignum2(&m, client_n); | ||
817 | |||
818 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); | ||
819 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | ||
820 | |||
821 | allowed = buffer_get_int(&m); | ||
822 | |||
823 | if (allowed && rkey != NULL) { | ||
824 | blob = buffer_get_string(&m, &blen); | ||
825 | if ((key = key_from_blob(blob, blen)) == NULL) | ||
826 | fatal("%s: key_from_blob failed", __FUNCTION__); | ||
827 | *rkey = key; | ||
828 | xfree(blob); | ||
829 | } | ||
830 | mm_send_debug(&m); | ||
831 | buffer_free(&m); | ||
832 | |||
833 | return (allowed); | ||
834 | } | ||
835 | |||
836 | BIGNUM * | ||
837 | mm_auth_rsa_generate_challenge(Key *key) | ||
838 | { | ||
839 | Buffer m; | ||
840 | BIGNUM *challenge; | ||
841 | u_char *blob; | ||
842 | u_int blen; | ||
843 | |||
844 | debug3("%s entering", __FUNCTION__); | ||
845 | |||
846 | if ((challenge = BN_new()) == NULL) | ||
847 | fatal("%s: BN_new failed", __FUNCTION__); | ||
848 | |||
849 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | ||
850 | if (key_to_blob(key, &blob, &blen) == 0) | ||
851 | fatal("%s: key_to_blob failed", __FUNCTION__); | ||
852 | key->type = KEY_RSA1; | ||
853 | |||
854 | buffer_init(&m); | ||
855 | buffer_put_string(&m, blob, blen); | ||
856 | xfree(blob); | ||
857 | |||
858 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); | ||
859 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | ||
860 | |||
861 | buffer_get_bignum2(&m, challenge); | ||
862 | buffer_free(&m); | ||
863 | |||
864 | return (challenge); | ||
865 | } | ||
866 | |||
867 | int | ||
868 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | ||
869 | { | ||
870 | Buffer m; | ||
871 | u_char *blob; | ||
872 | u_int blen; | ||
873 | int success = 0; | ||
874 | |||
875 | debug3("%s entering", __FUNCTION__); | ||
876 | |||
877 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | ||
878 | if (key_to_blob(key, &blob, &blen) == 0) | ||
879 | fatal("%s: key_to_blob failed", __FUNCTION__); | ||
880 | key->type = KEY_RSA1; | ||
881 | |||
882 | buffer_init(&m); | ||
883 | buffer_put_string(&m, blob, blen); | ||
884 | buffer_put_string(&m, response, 16); | ||
885 | xfree(blob); | ||
886 | |||
887 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); | ||
888 | mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | ||
889 | |||
890 | success = buffer_get_int(&m); | ||
891 | buffer_free(&m); | ||
892 | |||
893 | return (success); | ||
894 | } | ||