]>
Commit | Line | Data |
---|---|---|
91885a4d | 1 | /* |
2 | * Copyright 2001 Niels Provos <provos@citi.umich.edu> | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
21 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | */ | |
25 | ||
26 | #include "includes.h" | |
27 | RCSID("$OpenBSD$"); | |
28 | ||
29 | #include <openssl/dh.h> | |
30 | ||
31 | #include "ssh.h" | |
32 | #include "auth.h" | |
33 | #include "kex.h" | |
34 | #include "dh.h" | |
35 | #include "zlib.h" | |
36 | #include "packet.h" | |
37 | #include "auth-options.h" | |
38 | #include "sshpty.h" | |
39 | #include "channels.h" | |
40 | #include "session.h" | |
41 | #include "log.h" | |
42 | #include "monitor.h" | |
43 | #include "monitor_mm.h" | |
44 | #include "monitor_wrap.h" | |
45 | #include "monitor_fdpass.h" | |
46 | #include "xmalloc.h" | |
47 | #include "misc.h" | |
48 | #include "buffer.h" | |
49 | #include "bufaux.h" | |
50 | ||
51 | /* Imports */ | |
52 | extern Newkeys *current_keys[]; | |
53 | extern z_stream incoming_stream; | |
54 | extern z_stream outgoing_stream; | |
55 | extern int compat20; | |
56 | extern int mm_sendfd; | |
57 | ||
58 | /* State exported from the child */ | |
59 | ||
60 | struct { | |
61 | z_stream incoming; | |
62 | z_stream outgoing; | |
63 | u_char *keyin; | |
64 | u_int keyinlen; | |
65 | u_char *keyout; | |
66 | u_int keyoutlen; | |
67 | } child_state; | |
68 | ||
69 | /* Prototype for authentication functions */ | |
70 | ||
71 | int hostbased_key_allowed(struct passwd *, const char *, char *, Key *); | |
72 | int user_key_allowed(struct passwd *, Key *); | |
73 | Key *get_hostkey_by_index(int); | |
74 | ||
75 | void session_pty_cleanup(void *); | |
76 | ||
77 | static Authctxt *authctxt; | |
78 | ||
79 | struct mon_table { | |
80 | enum monitor_reqtype type; | |
81 | int flags; | |
82 | int (*f)(int, Buffer *); | |
83 | }; | |
84 | ||
85 | #define MON_PROTOONE 0x0001 /* Used in protocol 1 */ | |
86 | #define MON_PROTOTWO 0x0002 /* Used in protocol 2 */ | |
87 | #define MON_AUTH 0x0004 /* Authentication Request */ | |
88 | ||
89 | #define MON_BOTH (MON_PROTOONE|MON_PROTOTWO) | |
90 | ||
91 | #define MON_PERMIT 0x1000 /* Request is permitted */ | |
92 | ||
93 | struct mon_table mon_dispatch_proto20[] = { | |
94 | {MONITOR_REQ_MODULI, MON_PROTOTWO, mm_answer_moduli}, | |
95 | {MONITOR_REQ_SIGN, MON_PROTOTWO, mm_answer_sign}, | |
96 | {MONITOR_REQ_PWNAM, MON_BOTH, mm_answer_pwnamallow}, | |
97 | {MONITOR_REQ_AUTHSERV, MON_BOTH, mm_answer_authserv}, | |
98 | {MONITOR_REQ_AUTHPASSWORD, MON_BOTH | MON_AUTH, mm_answer_authpassword}, | |
99 | {MONITOR_REQ_KEYALLOWED, MON_BOTH | MON_AUTH, mm_answer_keyallowed}, | |
100 | {MONITOR_REQ_KEYVERIFY, MON_BOTH | MON_AUTH, mm_answer_keyverify}, | |
101 | {0, 0, NULL} | |
102 | }; | |
103 | ||
104 | struct mon_table mon_dispatch_postauth20[] = { | |
105 | {MONITOR_REQ_MODULI, MON_PROTOTWO, mm_answer_moduli}, | |
106 | {MONITOR_REQ_SIGN, MON_PROTOTWO, mm_answer_sign}, | |
107 | {MONITOR_REQ_PTY, MON_BOTH, mm_answer_pty}, | |
108 | {MONITOR_REQ_TERM, MON_BOTH, mm_answer_term}, | |
109 | {0, 0, NULL} | |
110 | }; | |
111 | ||
112 | struct mon_table mon_dispatch_proto15[] = { | |
113 | {0, 0, NULL} | |
114 | }; | |
115 | ||
116 | struct mon_table *mon_dispatch; | |
117 | ||
118 | /* Specifies if a certain message is allowed at the moment */ | |
119 | ||
120 | void | |
121 | monitor_permit(struct mon_table *ent, enum monitor_reqtype type, int permit) | |
122 | { | |
123 | while (ent->f != NULL) { | |
124 | if (ent->type == type) { | |
125 | ent->flags &= ~MON_PERMIT; | |
126 | ent->flags |= permit ? MON_PERMIT : 0; | |
127 | return; | |
128 | } | |
129 | ent++; | |
130 | } | |
131 | } | |
132 | ||
133 | void | |
134 | monitor_permit_authentications(int permit) | |
135 | { | |
136 | struct mon_table *ent = mon_dispatch; | |
137 | ||
138 | while (ent->f != NULL) { | |
139 | if (ent->flags & MON_AUTH) { | |
140 | ent->flags &= ~MON_PERMIT; | |
141 | ent->flags |= permit ? MON_PERMIT : 0; | |
142 | } | |
143 | ent++; | |
144 | } | |
145 | } | |
146 | ||
147 | #define FD_CLOSEONEXEC(x) do { \ | |
148 | if (fcntl(x, F_SETFD, 1) == -1) \ | |
149 | fatal("fcntl(%d, F_SETFD)", x); \ | |
150 | } while (0) | |
151 | ||
152 | void | |
153 | monitor_socketpair(int *pair) | |
154 | { | |
155 | if (socketpair(PF_LOCAL, SOCK_STREAM, 0, pair) == -1) | |
156 | fatal("%s: socketpair", __FUNCTION__); | |
157 | FD_CLOSEONEXEC(pair[0]); | |
158 | FD_CLOSEONEXEC(pair[1]); | |
159 | } | |
160 | ||
161 | Authctxt * | |
162 | monitor_child_preauth(int socket) | |
163 | { | |
164 | debug3("preauth child monitor started"); | |
165 | ||
166 | if (compat20) { | |
167 | mon_dispatch = mon_dispatch_proto20; | |
168 | ||
169 | /* Permit requests for moduli and signatures */ | |
170 | monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1); | |
171 | monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1); | |
172 | } else | |
173 | mon_dispatch = mon_dispatch_proto15; | |
174 | ||
175 | authctxt = authctxt_new(); | |
176 | ||
177 | /* The first few requests do not require asynchronous access */ | |
178 | for (;;) { | |
179 | if (monitor_read(socket, mon_dispatch)) | |
180 | break; | |
181 | } | |
182 | ||
183 | debug("%s: %s has been authenticated by privileged process", | |
184 | __FUNCTION__, authctxt->user); | |
185 | ||
186 | if (compat20) { | |
187 | mm_get_keystate(socket); | |
188 | } else { | |
189 | fatal("Use loose"); | |
190 | } | |
191 | ||
192 | return (authctxt); | |
193 | } | |
194 | ||
195 | void | |
196 | monitor_child_postauth(int socket) | |
197 | { | |
198 | if (compat20) { | |
199 | mon_dispatch = mon_dispatch_postauth20; | |
200 | ||
201 | /* Permit requests for moduli and signatures */ | |
202 | monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1); | |
203 | monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1); | |
204 | monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1); | |
205 | ||
206 | if (!no_pty_flag) | |
207 | monitor_permit(mon_dispatch, MONITOR_REQ_PTY, 1); | |
208 | } else | |
209 | mon_dispatch = mon_dispatch_proto15; | |
210 | ||
211 | for (;;) { | |
212 | if (monitor_read(socket, mon_dispatch)) | |
213 | break; | |
214 | } | |
215 | } | |
216 | ||
217 | int | |
218 | monitor_read(int socket, struct mon_table *ent) | |
219 | { | |
220 | Buffer m; | |
221 | int ret; | |
222 | u_char type; | |
223 | ||
224 | buffer_init(&m); | |
225 | ||
226 | mm_request_receive(socket, &m); | |
227 | type = buffer_get_char(&m); | |
228 | ||
229 | debug3("%s: checking request %d", __FUNCTION__, type); | |
230 | ||
231 | while (ent->f != NULL) { | |
232 | if (ent->type == type) | |
233 | break; | |
234 | ent++; | |
235 | } | |
236 | ||
237 | if (ent->f != NULL) { | |
238 | if (!(ent->flags & MON_PERMIT)) | |
239 | fatal("%s: unpermitted request %d", __FUNCTION__, | |
240 | type); | |
241 | ret = (*ent->f)(socket, &m); | |
242 | buffer_free(&m); | |
243 | return ret; | |
244 | } | |
245 | ||
246 | fatal("%s: unsupported request: %d\n", __FUNCTION__, type); | |
247 | ||
248 | /* NOTREACHED */ | |
249 | return (-1); | |
250 | } | |
251 | ||
252 | int | |
253 | mm_answer_moduli(int socket, Buffer *m) | |
254 | { | |
255 | DH *dh; | |
256 | int min, want, max; | |
257 | ||
258 | /* Turn off requests for moduli */ | |
259 | monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 0); | |
260 | ||
261 | min = buffer_get_int(m); | |
262 | want = buffer_get_int(m); | |
263 | max = buffer_get_int(m); | |
264 | ||
265 | debug3("%s: got parameters: %d %d %d", | |
266 | __FUNCTION__, min, want, max); | |
267 | /* We need to check here, too, in case the child got corrupted */ | |
268 | if (max < min || want < min || max < want) | |
269 | fatal("%s: bad parameters: %d %d %d", | |
270 | __FUNCTION__, min, want, max); | |
271 | ||
272 | buffer_clear(m); | |
273 | ||
274 | dh = choose_dh(min, want, max); | |
275 | if (dh == NULL) { | |
276 | buffer_put_char(m, 0); | |
277 | return (0); | |
278 | } else { | |
279 | /* Send first bignum */ | |
280 | buffer_put_char(m, 1); | |
281 | buffer_put_bignum2(m, dh->p); | |
282 | buffer_put_bignum2(m, dh->g); | |
283 | ||
284 | DH_free(dh); | |
285 | } | |
286 | mm_request_send(socket, MONITOR_ANS_MODULI, m); | |
287 | return (0); | |
288 | } | |
289 | ||
290 | int | |
291 | mm_answer_sign(int socket, Buffer *m) | |
292 | { | |
293 | Key *key; | |
294 | u_char *p; | |
295 | u_char *signature; | |
296 | u_int siglen, datlen; | |
297 | int keyid; | |
298 | ||
299 | debug3("%s", __FUNCTION__); | |
300 | ||
301 | keyid = buffer_get_int(m); | |
302 | p = buffer_get_string(m, &datlen); | |
303 | ||
304 | if ((key = get_hostkey_by_index(keyid)) == NULL) | |
305 | fatal("%s: no hostkey from index %d", __FUNCTION__, keyid); | |
306 | if (key_sign(key, &signature, &siglen, p, datlen) < 0) | |
307 | fatal("%s: key_sign failed", __FUNCTION__); | |
308 | ||
309 | debug3("%s: signature %p(%d)", __FUNCTION__, signature, siglen); | |
310 | ||
311 | buffer_clear(m); | |
312 | buffer_put_string(m, signature, siglen); | |
313 | ||
314 | xfree(p); | |
315 | xfree(signature); | |
316 | ||
317 | /* Turn on permissions for getpwnam */ | |
318 | monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1); | |
319 | ||
320 | mm_request_send(socket, MONITOR_ANS_SIGN, m); | |
321 | return (0); | |
322 | } | |
323 | ||
324 | /* Retrieves the password entry and also checks if the user is permitted */ | |
325 | ||
326 | int | |
327 | mm_answer_pwnamallow(int socket, Buffer *m) | |
328 | { | |
329 | char *login; | |
330 | struct passwd *pwent; | |
331 | int allowed; | |
332 | ||
333 | debug3("%s", __FUNCTION__); | |
334 | ||
335 | if (authctxt->attempt++ != 0) | |
336 | fatal("%s: multiple attempts for getpwnam", __FUNCTION__); | |
337 | ||
338 | login = buffer_get_string(m, NULL); | |
339 | ||
340 | /* XXX - probably latch the username here */ | |
341 | pwent = getpwnam(login); | |
342 | authctxt->user = xstrdup(login); | |
343 | setproctitle("%s [priv]", pwent ? login : "unknown"); | |
344 | xfree(login); | |
345 | ||
346 | /* Allow service/style information on the auth context */ | |
347 | monitor_permit(mon_dispatch, MONITOR_REQ_AUTHSERV, 1); | |
348 | ||
349 | buffer_clear(m); | |
350 | ||
351 | if (pwent == NULL) { | |
352 | buffer_put_char(m, 0); | |
353 | mm_request_send(socket, MONITOR_ANS_PWNAM, m); | |
354 | return (0); | |
355 | } | |
356 | ||
357 | /* Check if we permit this user */ | |
358 | allowed = allowed_user(pwent); | |
359 | ||
360 | if (allowed) { | |
361 | authctxt->pw = pwcopy(pwent); | |
362 | authctxt->valid = 1; | |
363 | } | |
364 | buffer_put_char(m, allowed); | |
365 | buffer_put_string(m, pwent, sizeof(struct passwd)); | |
366 | buffer_put_cstring(m, pwent->pw_name); | |
367 | buffer_put_cstring(m, "*"); | |
368 | buffer_put_cstring(m, pwent->pw_gecos); | |
369 | buffer_put_cstring(m, pwent->pw_class); | |
370 | buffer_put_cstring(m, pwent->pw_dir); | |
371 | buffer_put_cstring(m, pwent->pw_shell); | |
372 | ||
373 | debug3("%s: sending MONITOR_ANS_PWNAM: %d", __FUNCTION__, allowed); | |
374 | mm_request_send(socket, MONITOR_ANS_PWNAM, m); | |
375 | ||
376 | return (0); | |
377 | } | |
378 | ||
379 | int | |
380 | mm_answer_authserv(int socket, Buffer *m) | |
381 | { | |
382 | /* Disallow service/style information on the auth context */ | |
383 | monitor_permit(mon_dispatch, MONITOR_REQ_AUTHSERV, 0); | |
384 | ||
385 | monitor_permit_authentications(1); | |
386 | ||
387 | authctxt->service = buffer_get_string(m, NULL); | |
388 | authctxt->style = buffer_get_string(m, NULL); | |
389 | if (strlen(authctxt->style) == 0) { | |
390 | xfree(authctxt->style); | |
391 | authctxt->style = NULL; | |
392 | } | |
393 | ||
394 | debug3("%s: service=%s, style=%s", | |
395 | __FUNCTION__, authctxt->service, authctxt->style); | |
396 | ||
397 | return (0); | |
398 | } | |
399 | ||
400 | int | |
401 | mm_answer_authpassword(int socket, Buffer *m) | |
402 | { | |
403 | char *passwd; | |
404 | int authenticated; | |
405 | ||
406 | passwd = buffer_get_string(m, NULL); | |
407 | /* Only authenticate if the context is valid */ | |
408 | authenticated = authctxt->valid && auth_password(authctxt, passwd); | |
409 | memset(passwd, 0, strlen(passwd)); | |
410 | xfree(passwd); | |
411 | ||
412 | buffer_clear(m); | |
413 | buffer_put_int(m, authenticated); | |
414 | ||
415 | debug3("%s: sending result %d", __FUNCTION__, authenticated); | |
416 | mm_request_send(socket, MONITOR_ANS_AUTHPASSWORD, m); | |
417 | ||
418 | /* Causes monitor loop to terminate if authenticated */ | |
419 | return (authenticated); | |
420 | } | |
421 | ||
422 | int | |
423 | mm_answer_keyallowed(int socket, Buffer *m) | |
424 | { | |
425 | Key *key; | |
426 | u_char *cuser, *chost, *blob; | |
427 | u_int bloblen; | |
428 | enum mm_keytype type = 0; | |
429 | int allowed = 0; | |
430 | ||
431 | debug3("%s entering", __FUNCTION__); | |
432 | ||
433 | type = buffer_get_int(m); | |
434 | cuser = buffer_get_string(m, NULL); | |
435 | chost = buffer_get_string(m, NULL); | |
436 | blob = buffer_get_string(m, &bloblen); | |
437 | ||
438 | key = key_from_blob(blob, bloblen); | |
439 | ||
440 | debug3("%s: key_from_blob: %p", __FUNCTION__, key); | |
441 | ||
442 | if (key != NULL && authctxt->pw != NULL) { | |
443 | switch(type) { | |
444 | case MM_USERKEY: | |
445 | allowed = user_key_allowed(authctxt->pw, key); | |
446 | break; | |
447 | case MM_HOSTKEY: | |
448 | allowed = hostbased_key_allowed(authctxt->pw, | |
449 | cuser, chost, key); | |
450 | break; | |
451 | default: | |
452 | fatal("%s: unknown key type %d", __FUNCTION__, | |
453 | type); | |
454 | break; | |
455 | } | |
456 | key_free(key); | |
457 | } | |
458 | xfree(chost); | |
459 | xfree(cuser); | |
460 | xfree(blob); | |
461 | ||
462 | debug3("%s: key %p is %s", | |
463 | __FUNCTION__, key, allowed ? "allowed" : "disallowed"); | |
464 | ||
465 | buffer_clear(m); | |
466 | buffer_put_int(m, allowed); | |
467 | ||
468 | mm_request_send(socket, MONITOR_ANS_KEYALLOWED, m); | |
469 | return (0); | |
470 | } | |
471 | ||
472 | int | |
473 | mm_answer_keyverify(int socket, Buffer *m) | |
474 | { | |
475 | Key *key; | |
476 | u_char *signature, *data, *cuser, *chost, *blob; | |
477 | u_int signaturelen, datalen, bloblen; | |
478 | int type; | |
479 | int verified = 0; | |
480 | ||
481 | type = buffer_get_int(m); | |
482 | cuser = buffer_get_string(m, NULL); | |
483 | chost = buffer_get_string(m, NULL); | |
484 | blob = buffer_get_string(m, &bloblen); | |
485 | signature = buffer_get_string(m, &signaturelen); | |
486 | data = buffer_get_string(m, &datalen); | |
487 | ||
488 | key = key_from_blob(blob, bloblen); | |
489 | if (key == NULL) | |
490 | fatal("%s: bad public key blob", __FUNCTION__); | |
491 | ||
492 | if (authctxt->pw == NULL || !user_key_allowed(authctxt->pw, key)) | |
493 | fatal("%s: user not allowed", __FUNCTION__); | |
494 | verified = key_verify(key, signature, signaturelen, data, datalen); | |
495 | debug3("%s: key %p signature %s", | |
496 | __FUNCTION__, key, verified ? "verified" : "unverified"); | |
497 | ||
498 | key_free(key); | |
499 | xfree(chost); | |
500 | xfree(cuser); | |
501 | xfree(blob); | |
502 | xfree(signature); | |
503 | xfree(data); | |
504 | ||
505 | buffer_clear(m); | |
506 | buffer_put_int(m, verified); | |
507 | mm_request_send(socket, MONITOR_ANS_KEYVERIFY, m); | |
508 | ||
509 | return (verified); | |
510 | } | |
511 | ||
512 | int | |
513 | mm_answer_pty(int socket, Buffer *m) | |
514 | { | |
515 | Session *s; | |
516 | int res; | |
517 | ||
518 | debug3("%s entering", __FUNCTION__); | |
519 | ||
520 | buffer_clear(m); | |
521 | s = session_new(); | |
522 | if (s == NULL) | |
523 | goto error; | |
524 | s->authctxt = authctxt; | |
525 | s->pw = authctxt->pw; | |
526 | res = pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty)); | |
527 | if (res == 0) | |
528 | goto error; | |
529 | fatal_add_cleanup(session_pty_cleanup, (void *)s); | |
530 | pty_setowner(authctxt->pw, s->tty); | |
531 | ||
532 | buffer_put_int(m, 1); | |
533 | buffer_put_cstring(m, s->tty); | |
534 | mm_request_send(socket, MONITOR_ANS_PTY, m); | |
535 | ||
536 | mm_send_fd(mm_sendfd, s->ptyfd); | |
537 | mm_send_fd(mm_sendfd, s->ttyfd); | |
538 | return (0); | |
539 | ||
540 | error: | |
541 | if (s != NULL) | |
542 | session_close(s); | |
543 | buffer_put_int(m, 0); | |
544 | mm_request_send(socket, MONITOR_ANS_PTY, m); | |
545 | return (0); | |
546 | } | |
547 | ||
548 | int | |
549 | mm_answer_term(int socket, Buffer *req) | |
550 | { | |
551 | debug3("%s: tearing down sessions", __FUNCTION__); | |
552 | ||
553 | /* The child is terminating */ | |
554 | session_destroy_all(); | |
555 | ||
556 | return (1); | |
557 | } | |
558 | ||
559 | void | |
560 | mm_apply_keystate(struct mm_master *mm) | |
561 | { | |
562 | /* XXX - delegate to child? */ | |
563 | set_newkeys(MODE_IN); | |
564 | set_newkeys(MODE_OUT); | |
565 | ||
566 | packet_set_keycontext(MODE_OUT, child_state.keyout); | |
567 | xfree(child_state.keyout); | |
568 | packet_set_keycontext(MODE_IN, child_state.keyin); | |
569 | xfree(child_state.keyin); | |
570 | ||
571 | memcpy(&incoming_stream, &child_state.incoming, | |
572 | sizeof(incoming_stream)); | |
573 | memcpy(&outgoing_stream, &child_state.outgoing, | |
574 | sizeof(outgoing_stream)); | |
575 | ||
576 | /* Update with new address */ | |
577 | mm_init_compression(mm); | |
578 | } | |
579 | ||
580 | /* This function requries careful sanity checking */ | |
581 | ||
582 | void | |
583 | mm_get_keystate(int socket) | |
584 | { | |
585 | Buffer m; | |
586 | u_char *blob, *p; | |
587 | u_int bloblen, plen; | |
588 | ||
589 | debug3("%s: Waiting for new keys", __FUNCTION__); | |
590 | ||
591 | buffer_init(&m); | |
592 | mm_request_receive_expect(socket, MONITOR_REQ_KEYEXPORT, &m); | |
593 | ||
594 | blob = buffer_get_string(&m, &bloblen); | |
595 | current_keys[MODE_OUT] = mm_newkeys_from_blob(blob, bloblen); | |
596 | xfree(blob); | |
597 | ||
598 | debug3("%s: Waiting for second key", __FUNCTION__); | |
599 | blob = buffer_get_string(&m, &bloblen); | |
600 | current_keys[MODE_IN] = mm_newkeys_from_blob(blob, bloblen); | |
601 | xfree(blob); | |
602 | ||
603 | /* Now get sequence numbers for the packets */ | |
604 | packet_set_seqnr(MODE_OUT, buffer_get_int(&m)); | |
605 | packet_set_seqnr(MODE_IN, buffer_get_int(&m)); | |
606 | ||
607 | /* Get the key context */ | |
608 | child_state.keyout = buffer_get_string(&m, &child_state.keyoutlen); | |
609 | child_state.keyin = buffer_get_string(&m, &child_state.keyinlen); | |
610 | ||
611 | debug3("%s: Getting compression state", __FUNCTION__); | |
612 | /* Get compression state */ | |
613 | p = buffer_get_string(&m, &plen); | |
614 | if (plen != sizeof(child_state.outgoing)) | |
615 | fatal("%s: bad request size", __FUNCTION__); | |
616 | memcpy(&child_state.outgoing, p, sizeof(child_state.outgoing)); | |
617 | xfree(p); | |
618 | ||
619 | p = buffer_get_string(&m, &plen); | |
620 | if (plen != sizeof(child_state.incoming)) | |
621 | fatal("%s: bad request size", __FUNCTION__); | |
622 | memcpy(&child_state.incoming, p, sizeof(child_state.incoming)); | |
623 | xfree(p); | |
624 | ||
625 | buffer_free(&m); | |
626 | } | |
627 | ||
628 | ||
629 | /* Allocation functions for zlib */ | |
630 | void * | |
631 | mm_zalloc(struct mm_master *mm, u_int ncount, u_int size) | |
632 | { | |
633 | void *address; | |
634 | ||
635 | address = mm_malloc(mm, size * ncount); | |
636 | ||
637 | return (address); | |
638 | } | |
639 | ||
640 | void | |
641 | mm_zfree(struct mm_master *mm, void *address) | |
642 | { | |
643 | mm_free(mm, address); | |
644 | } | |
645 | ||
646 | void | |
647 | mm_init_compression(struct mm_master *mm) | |
648 | { | |
649 | outgoing_stream.zalloc = (alloc_func)mm_zalloc; | |
650 | outgoing_stream.zfree = (free_func)mm_zfree; | |
651 | outgoing_stream.opaque = mm; | |
652 | ||
653 | incoming_stream.zalloc = (alloc_func)mm_zalloc; | |
654 | incoming_stream.zfree = (free_func)mm_zfree; | |
655 | incoming_stream.opaque = mm; | |
656 | } |