]>
Commit | Line | Data |
---|---|---|
1853d1ef | 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" | |
2db9d8aa | 28 | RCSID("$OpenBSD: monitor.c,v 1.29 2002/09/26 11:38:43 markus Exp $"); |
1853d1ef | 29 | |
30 | #include <openssl/dh.h> | |
31 | ||
32 | #ifdef SKEY | |
33 | #include <skey.h> | |
34 | #endif | |
35 | ||
36 | #include "ssh.h" | |
37 | #include "auth.h" | |
38 | #include "kex.h" | |
39 | #include "dh.h" | |
40 | #include "zlib.h" | |
41 | #include "packet.h" | |
42 | #include "auth-options.h" | |
43 | #include "sshpty.h" | |
44 | #include "channels.h" | |
45 | #include "session.h" | |
46 | #include "sshlogin.h" | |
47 | #include "canohost.h" | |
48 | #include "log.h" | |
49 | #include "servconf.h" | |
50 | #include "monitor.h" | |
51 | #include "monitor_mm.h" | |
52 | #include "monitor_wrap.h" | |
53 | #include "monitor_fdpass.h" | |
54 | #include "xmalloc.h" | |
55 | #include "misc.h" | |
56 | #include "buffer.h" | |
57 | #include "bufaux.h" | |
58 | #include "compat.h" | |
59 | #include "ssh2.h" | |
60 | #include "mpaux.h" | |
61 | ||
62 | /* Imports */ | |
63 | extern ServerOptions options; | |
64 | extern u_int utmp_len; | |
65 | extern Newkeys *current_keys[]; | |
66 | extern z_stream incoming_stream; | |
67 | extern z_stream outgoing_stream; | |
68 | extern u_char session_id[]; | |
69 | extern Buffer input, output; | |
70 | extern Buffer auth_debug; | |
71 | extern int auth_debug_init; | |
72 | ||
73 | /* State exported from the child */ | |
74 | ||
75 | struct { | |
76 | z_stream incoming; | |
77 | z_stream outgoing; | |
78 | u_char *keyin; | |
79 | u_int keyinlen; | |
80 | u_char *keyout; | |
81 | u_int keyoutlen; | |
82 | u_char *ivin; | |
83 | u_int ivinlen; | |
84 | u_char *ivout; | |
85 | u_int ivoutlen; | |
9459414c | 86 | u_char *ssh1key; |
87 | u_int ssh1keylen; | |
1853d1ef | 88 | int ssh1cipher; |
89 | int ssh1protoflags; | |
90 | u_char *input; | |
91 | u_int ilen; | |
92 | u_char *output; | |
93 | u_int olen; | |
94 | } child_state; | |
95 | ||
96 | /* Functions on the montior that answer unprivileged requests */ | |
97 | ||
98 | int mm_answer_moduli(int, Buffer *); | |
99 | int mm_answer_sign(int, Buffer *); | |
100 | int mm_answer_pwnamallow(int, Buffer *); | |
94a73cdc | 101 | int mm_answer_auth2_read_banner(int, Buffer *); |
1853d1ef | 102 | int mm_answer_authserv(int, Buffer *); |
103 | int mm_answer_authpassword(int, Buffer *); | |
104 | int mm_answer_bsdauthquery(int, Buffer *); | |
105 | int mm_answer_bsdauthrespond(int, Buffer *); | |
106 | int mm_answer_skeyquery(int, Buffer *); | |
107 | int mm_answer_skeyrespond(int, Buffer *); | |
108 | int mm_answer_keyallowed(int, Buffer *); | |
109 | int mm_answer_keyverify(int, Buffer *); | |
110 | int mm_answer_pty(int, Buffer *); | |
111 | int mm_answer_pty_cleanup(int, Buffer *); | |
112 | int mm_answer_term(int, Buffer *); | |
113 | int mm_answer_rsa_keyallowed(int, Buffer *); | |
114 | int mm_answer_rsa_challenge(int, Buffer *); | |
115 | int mm_answer_rsa_response(int, Buffer *); | |
116 | int mm_answer_sesskey(int, Buffer *); | |
117 | int mm_answer_sessid(int, Buffer *); | |
118 | ||
ad200abb | 119 | #ifdef USE_PAM |
120 | int mm_answer_pam_start(int, Buffer *); | |
121 | #endif | |
122 | ||
2db9d8aa | 123 | #ifdef KRB4 |
124 | int mm_answer_krb4(int, Buffer *); | |
125 | #endif | |
696f6bef | 126 | #ifdef KRB5 |
127 | int mm_answer_krb5(int, Buffer *); | |
128 | #endif | |
129 | ||
1853d1ef | 130 | static Authctxt *authctxt; |
131 | static BIGNUM *ssh1_challenge = NULL; /* used for ssh1 rsa auth */ | |
132 | ||
133 | /* local state for key verify */ | |
134 | static u_char *key_blob = NULL; | |
135 | static u_int key_bloblen = 0; | |
136 | static int key_blobtype = MM_NOKEY; | |
661e45a0 | 137 | static char *hostbased_cuser = NULL; |
138 | static char *hostbased_chost = NULL; | |
1853d1ef | 139 | static char *auth_method = "unknown"; |
521d606b | 140 | static int session_id2_len = 0; |
141 | static u_char *session_id2 = NULL; | |
1853d1ef | 142 | |
143 | struct mon_table { | |
144 | enum monitor_reqtype type; | |
145 | int flags; | |
146 | int (*f)(int, Buffer *); | |
147 | }; | |
148 | ||
149 | #define MON_ISAUTH 0x0004 /* Required for Authentication */ | |
150 | #define MON_AUTHDECIDE 0x0008 /* Decides Authentication */ | |
151 | #define MON_ONCE 0x0010 /* Disable after calling */ | |
152 | ||
153 | #define MON_AUTH (MON_ISAUTH|MON_AUTHDECIDE) | |
154 | ||
155 | #define MON_PERMIT 0x1000 /* Request is permitted */ | |
156 | ||
157 | struct mon_table mon_dispatch_proto20[] = { | |
158 | {MONITOR_REQ_MODULI, MON_ONCE, mm_answer_moduli}, | |
159 | {MONITOR_REQ_SIGN, MON_ONCE, mm_answer_sign}, | |
160 | {MONITOR_REQ_PWNAM, MON_ONCE, mm_answer_pwnamallow}, | |
161 | {MONITOR_REQ_AUTHSERV, MON_ONCE, mm_answer_authserv}, | |
94a73cdc | 162 | {MONITOR_REQ_AUTH2_READ_BANNER, MON_ONCE, mm_answer_auth2_read_banner}, |
1853d1ef | 163 | {MONITOR_REQ_AUTHPASSWORD, MON_AUTH, mm_answer_authpassword}, |
ad200abb | 164 | #ifdef USE_PAM |
165 | {MONITOR_REQ_PAM_START, MON_ONCE, mm_answer_pam_start}, | |
8b314ec9 | 166 | #endif |
1853d1ef | 167 | #ifdef BSD_AUTH |
168 | {MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery}, | |
169 | {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH,mm_answer_bsdauthrespond}, | |
170 | #endif | |
171 | #ifdef SKEY | |
172 | {MONITOR_REQ_SKEYQUERY, MON_ISAUTH, mm_answer_skeyquery}, | |
173 | {MONITOR_REQ_SKEYRESPOND, MON_AUTH, mm_answer_skeyrespond}, | |
174 | #endif | |
175 | {MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed}, | |
176 | {MONITOR_REQ_KEYVERIFY, MON_AUTH, mm_answer_keyverify}, | |
177 | {0, 0, NULL} | |
178 | }; | |
179 | ||
180 | struct mon_table mon_dispatch_postauth20[] = { | |
181 | {MONITOR_REQ_MODULI, 0, mm_answer_moduli}, | |
182 | {MONITOR_REQ_SIGN, 0, mm_answer_sign}, | |
183 | {MONITOR_REQ_PTY, 0, mm_answer_pty}, | |
184 | {MONITOR_REQ_PTYCLEANUP, 0, mm_answer_pty_cleanup}, | |
185 | {MONITOR_REQ_TERM, 0, mm_answer_term}, | |
186 | {0, 0, NULL} | |
187 | }; | |
188 | ||
189 | struct mon_table mon_dispatch_proto15[] = { | |
190 | {MONITOR_REQ_PWNAM, MON_ONCE, mm_answer_pwnamallow}, | |
191 | {MONITOR_REQ_SESSKEY, MON_ONCE, mm_answer_sesskey}, | |
192 | {MONITOR_REQ_SESSID, MON_ONCE, mm_answer_sessid}, | |
193 | {MONITOR_REQ_AUTHPASSWORD, MON_AUTH, mm_answer_authpassword}, | |
194 | {MONITOR_REQ_RSAKEYALLOWED, MON_ISAUTH, mm_answer_rsa_keyallowed}, | |
195 | {MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed}, | |
196 | {MONITOR_REQ_RSACHALLENGE, MON_ONCE, mm_answer_rsa_challenge}, | |
197 | {MONITOR_REQ_RSARESPONSE, MON_ONCE|MON_AUTHDECIDE, mm_answer_rsa_response}, | |
198 | #ifdef BSD_AUTH | |
199 | {MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery}, | |
200 | {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH,mm_answer_bsdauthrespond}, | |
201 | #endif | |
202 | #ifdef SKEY | |
203 | {MONITOR_REQ_SKEYQUERY, MON_ISAUTH, mm_answer_skeyquery}, | |
204 | {MONITOR_REQ_SKEYRESPOND, MON_AUTH, mm_answer_skeyrespond}, | |
efe44db6 | 205 | #endif |
206 | #ifdef USE_PAM | |
207 | {MONITOR_REQ_PAM_START, MON_ONCE, mm_answer_pam_start}, | |
696f6bef | 208 | #endif |
2db9d8aa | 209 | #ifdef KRB4 |
210 | {MONITOR_REQ_KRB4, MON_ONCE|MON_AUTH, mm_answer_krb4}, | |
211 | #endif | |
696f6bef | 212 | #ifdef KRB5 |
213 | {MONITOR_REQ_KRB5, MON_ONCE|MON_AUTH, mm_answer_krb5}, | |
1853d1ef | 214 | #endif |
215 | {0, 0, NULL} | |
216 | }; | |
217 | ||
218 | struct mon_table mon_dispatch_postauth15[] = { | |
219 | {MONITOR_REQ_PTY, MON_ONCE, mm_answer_pty}, | |
220 | {MONITOR_REQ_PTYCLEANUP, MON_ONCE, mm_answer_pty_cleanup}, | |
221 | {MONITOR_REQ_TERM, 0, mm_answer_term}, | |
222 | {0, 0, NULL} | |
223 | }; | |
224 | ||
225 | struct mon_table *mon_dispatch; | |
226 | ||
227 | /* Specifies if a certain message is allowed at the moment */ | |
228 | ||
229 | static void | |
230 | monitor_permit(struct mon_table *ent, enum monitor_reqtype type, int permit) | |
231 | { | |
232 | while (ent->f != NULL) { | |
233 | if (ent->type == type) { | |
234 | ent->flags &= ~MON_PERMIT; | |
235 | ent->flags |= permit ? MON_PERMIT : 0; | |
236 | return; | |
237 | } | |
238 | ent++; | |
239 | } | |
240 | } | |
241 | ||
242 | static void | |
243 | monitor_permit_authentications(int permit) | |
244 | { | |
245 | struct mon_table *ent = mon_dispatch; | |
246 | ||
247 | while (ent->f != NULL) { | |
248 | if (ent->flags & MON_AUTH) { | |
249 | ent->flags &= ~MON_PERMIT; | |
250 | ent->flags |= permit ? MON_PERMIT : 0; | |
251 | } | |
252 | ent++; | |
253 | } | |
254 | } | |
255 | ||
256 | Authctxt * | |
b5a28cbc | 257 | monitor_child_preauth(struct monitor *pmonitor) |
1853d1ef | 258 | { |
259 | struct mon_table *ent; | |
260 | int authenticated = 0; | |
261 | ||
262 | debug3("preauth child monitor started"); | |
263 | ||
264 | if (compat20) { | |
265 | mon_dispatch = mon_dispatch_proto20; | |
266 | ||
267 | /* Permit requests for moduli and signatures */ | |
268 | monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1); | |
269 | monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1); | |
270 | } else { | |
271 | mon_dispatch = mon_dispatch_proto15; | |
272 | ||
273 | monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 1); | |
274 | } | |
275 | ||
276 | authctxt = authctxt_new(); | |
277 | ||
278 | /* The first few requests do not require asynchronous access */ | |
279 | while (!authenticated) { | |
b5a28cbc | 280 | authenticated = monitor_read(pmonitor, mon_dispatch, &ent); |
1853d1ef | 281 | if (authenticated) { |
282 | if (!(ent->flags & MON_AUTHDECIDE)) | |
283 | fatal("%s: unexpected authentication from %d", | |
1588c277 | 284 | __func__, ent->type); |
1853d1ef | 285 | if (authctxt->pw->pw_uid == 0 && |
286 | !auth_root_allowed(auth_method)) | |
287 | authenticated = 0; | |
ad200abb | 288 | #ifdef USE_PAM |
289 | if (!do_pam_account(authctxt->pw->pw_name, NULL)) | |
290 | authenticated = 0; | |
291 | #endif | |
1853d1ef | 292 | } |
293 | ||
294 | if (ent->flags & MON_AUTHDECIDE) { | |
295 | auth_log(authctxt, authenticated, auth_method, | |
296 | compat20 ? " ssh2" : ""); | |
297 | if (!authenticated) | |
298 | authctxt->failures++; | |
299 | } | |
300 | } | |
301 | ||
302 | if (!authctxt->valid) | |
1588c277 | 303 | fatal("%s: authenticated invalid user", __func__); |
1853d1ef | 304 | |
305 | debug("%s: %s has been authenticated by privileged process", | |
1588c277 | 306 | __func__, authctxt->user); |
1853d1ef | 307 | |
b5a28cbc | 308 | mm_get_keystate(pmonitor); |
1853d1ef | 309 | |
310 | return (authctxt); | |
311 | } | |
312 | ||
313 | void | |
b5a28cbc | 314 | monitor_child_postauth(struct monitor *pmonitor) |
1853d1ef | 315 | { |
316 | if (compat20) { | |
317 | mon_dispatch = mon_dispatch_postauth20; | |
318 | ||
319 | /* Permit requests for moduli and signatures */ | |
320 | monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1); | |
321 | monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1); | |
322 | monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1); | |
323 | ||
324 | } else { | |
325 | mon_dispatch = mon_dispatch_postauth15; | |
326 | monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1); | |
327 | } | |
328 | if (!no_pty_flag) { | |
329 | monitor_permit(mon_dispatch, MONITOR_REQ_PTY, 1); | |
330 | monitor_permit(mon_dispatch, MONITOR_REQ_PTYCLEANUP, 1); | |
331 | } | |
332 | ||
333 | for (;;) | |
b5a28cbc | 334 | monitor_read(pmonitor, mon_dispatch, NULL); |
1853d1ef | 335 | } |
336 | ||
337 | void | |
b5a28cbc | 338 | monitor_sync(struct monitor *pmonitor) |
1853d1ef | 339 | { |
0496cf34 | 340 | if (options.compression) { |
341 | /* The member allocation is not visible, so sync it */ | |
342 | mm_share_sync(&pmonitor->m_zlib, &pmonitor->m_zback); | |
343 | } | |
1853d1ef | 344 | } |
345 | ||
346 | int | |
b5a28cbc | 347 | monitor_read(struct monitor *pmonitor, struct mon_table *ent, |
1853d1ef | 348 | struct mon_table **pent) |
349 | { | |
350 | Buffer m; | |
351 | int ret; | |
352 | u_char type; | |
353 | ||
354 | buffer_init(&m); | |
355 | ||
b5a28cbc | 356 | mm_request_receive(pmonitor->m_sendfd, &m); |
1853d1ef | 357 | type = buffer_get_char(&m); |
358 | ||
1588c277 | 359 | debug3("%s: checking request %d", __func__, type); |
1853d1ef | 360 | |
361 | while (ent->f != NULL) { | |
362 | if (ent->type == type) | |
363 | break; | |
364 | ent++; | |
365 | } | |
366 | ||
367 | if (ent->f != NULL) { | |
368 | if (!(ent->flags & MON_PERMIT)) | |
1588c277 | 369 | fatal("%s: unpermitted request %d", __func__, |
1853d1ef | 370 | type); |
b5a28cbc | 371 | ret = (*ent->f)(pmonitor->m_sendfd, &m); |
1853d1ef | 372 | buffer_free(&m); |
373 | ||
374 | /* The child may use this request only once, disable it */ | |
375 | if (ent->flags & MON_ONCE) { | |
1588c277 | 376 | debug2("%s: %d used once, disabling now", __func__, |
1853d1ef | 377 | type); |
378 | ent->flags &= ~MON_PERMIT; | |
379 | } | |
380 | ||
381 | if (pent != NULL) | |
382 | *pent = ent; | |
383 | ||
384 | return ret; | |
385 | } | |
386 | ||
1588c277 | 387 | fatal("%s: unsupported request: %d", __func__, type); |
1853d1ef | 388 | |
389 | /* NOTREACHED */ | |
390 | return (-1); | |
391 | } | |
392 | ||
393 | /* allowed key state */ | |
394 | static int | |
395 | monitor_allowed_key(u_char *blob, u_int bloblen) | |
396 | { | |
397 | /* make sure key is allowed */ | |
398 | if (key_blob == NULL || key_bloblen != bloblen || | |
399 | memcmp(key_blob, blob, key_bloblen)) | |
400 | return (0); | |
401 | return (1); | |
402 | } | |
403 | ||
404 | static void | |
405 | monitor_reset_key_state(void) | |
406 | { | |
407 | /* reset state */ | |
408 | if (key_blob != NULL) | |
409 | xfree(key_blob); | |
410 | if (hostbased_cuser != NULL) | |
411 | xfree(hostbased_cuser); | |
412 | if (hostbased_chost != NULL) | |
413 | xfree(hostbased_chost); | |
414 | key_blob = NULL; | |
415 | key_bloblen = 0; | |
416 | key_blobtype = MM_NOKEY; | |
417 | hostbased_cuser = NULL; | |
418 | hostbased_chost = NULL; | |
419 | } | |
420 | ||
421 | int | |
422 | mm_answer_moduli(int socket, Buffer *m) | |
423 | { | |
424 | DH *dh; | |
425 | int min, want, max; | |
426 | ||
427 | min = buffer_get_int(m); | |
428 | want = buffer_get_int(m); | |
429 | max = buffer_get_int(m); | |
430 | ||
431 | debug3("%s: got parameters: %d %d %d", | |
1588c277 | 432 | __func__, min, want, max); |
1853d1ef | 433 | /* We need to check here, too, in case the child got corrupted */ |
434 | if (max < min || want < min || max < want) | |
435 | fatal("%s: bad parameters: %d %d %d", | |
1588c277 | 436 | __func__, min, want, max); |
1853d1ef | 437 | |
438 | buffer_clear(m); | |
439 | ||
440 | dh = choose_dh(min, want, max); | |
441 | if (dh == NULL) { | |
442 | buffer_put_char(m, 0); | |
443 | return (0); | |
444 | } else { | |
445 | /* Send first bignum */ | |
446 | buffer_put_char(m, 1); | |
447 | buffer_put_bignum2(m, dh->p); | |
448 | buffer_put_bignum2(m, dh->g); | |
449 | ||
450 | DH_free(dh); | |
451 | } | |
452 | mm_request_send(socket, MONITOR_ANS_MODULI, m); | |
453 | return (0); | |
454 | } | |
455 | ||
456 | int | |
457 | mm_answer_sign(int socket, Buffer *m) | |
458 | { | |
459 | Key *key; | |
460 | u_char *p; | |
461 | u_char *signature; | |
462 | u_int siglen, datlen; | |
463 | int keyid; | |
464 | ||
1588c277 | 465 | debug3("%s", __func__); |
1853d1ef | 466 | |
467 | keyid = buffer_get_int(m); | |
468 | p = buffer_get_string(m, &datlen); | |
469 | ||
470 | if (datlen != 20) | |
d1ff09ba | 471 | fatal("%s: data length incorrect: %u", __func__, datlen); |
1853d1ef | 472 | |
521d606b | 473 | /* save session id, it will be passed on the first call */ |
474 | if (session_id2_len == 0) { | |
475 | session_id2_len = datlen; | |
476 | session_id2 = xmalloc(session_id2_len); | |
477 | memcpy(session_id2, p, session_id2_len); | |
478 | } | |
479 | ||
1853d1ef | 480 | if ((key = get_hostkey_by_index(keyid)) == NULL) |
1588c277 | 481 | fatal("%s: no hostkey from index %d", __func__, keyid); |
1853d1ef | 482 | if (key_sign(key, &signature, &siglen, p, datlen) < 0) |
1588c277 | 483 | fatal("%s: key_sign failed", __func__); |
1853d1ef | 484 | |
d1ff09ba | 485 | debug3("%s: signature %p(%u)", __func__, signature, siglen); |
1853d1ef | 486 | |
487 | buffer_clear(m); | |
488 | buffer_put_string(m, signature, siglen); | |
489 | ||
490 | xfree(p); | |
491 | xfree(signature); | |
492 | ||
493 | mm_request_send(socket, MONITOR_ANS_SIGN, m); | |
494 | ||
495 | /* Turn on permissions for getpwnam */ | |
496 | monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1); | |
497 | ||
498 | return (0); | |
499 | } | |
500 | ||
501 | /* Retrieves the password entry and also checks if the user is permitted */ | |
502 | ||
503 | int | |
504 | mm_answer_pwnamallow(int socket, Buffer *m) | |
505 | { | |
506 | char *login; | |
507 | struct passwd *pwent; | |
508 | int allowed = 0; | |
509 | ||
1588c277 | 510 | debug3("%s", __func__); |
1853d1ef | 511 | |
512 | if (authctxt->attempt++ != 0) | |
1588c277 | 513 | fatal("%s: multiple attempts for getpwnam", __func__); |
1853d1ef | 514 | |
515 | login = buffer_get_string(m, NULL); | |
516 | ||
517 | pwent = getpwnamallow(login); | |
518 | ||
519 | authctxt->user = xstrdup(login); | |
520 | setproctitle("%s [priv]", pwent ? login : "unknown"); | |
521 | xfree(login); | |
522 | ||
523 | buffer_clear(m); | |
524 | ||
525 | if (pwent == NULL) { | |
526 | buffer_put_char(m, 0); | |
527 | goto out; | |
528 | } | |
529 | ||
530 | allowed = 1; | |
531 | authctxt->pw = pwent; | |
532 | authctxt->valid = 1; | |
533 | ||
534 | buffer_put_char(m, 1); | |
535 | buffer_put_string(m, pwent, sizeof(struct passwd)); | |
536 | buffer_put_cstring(m, pwent->pw_name); | |
537 | buffer_put_cstring(m, "*"); | |
538 | buffer_put_cstring(m, pwent->pw_gecos); | |
7b18c353 | 539 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 540 | buffer_put_cstring(m, pwent->pw_class); |
7b18c353 | 541 | #endif |
1853d1ef | 542 | buffer_put_cstring(m, pwent->pw_dir); |
543 | buffer_put_cstring(m, pwent->pw_shell); | |
544 | ||
545 | out: | |
1588c277 | 546 | debug3("%s: sending MONITOR_ANS_PWNAM: %d", __func__, allowed); |
1853d1ef | 547 | mm_request_send(socket, MONITOR_ANS_PWNAM, m); |
548 | ||
549 | /* For SSHv1 allow authentication now */ | |
550 | if (!compat20) | |
551 | monitor_permit_authentications(1); | |
94a73cdc | 552 | else { |
1853d1ef | 553 | /* Allow service/style information on the auth context */ |
554 | monitor_permit(mon_dispatch, MONITOR_REQ_AUTHSERV, 1); | |
94a73cdc | 555 | monitor_permit(mon_dispatch, MONITOR_REQ_AUTH2_READ_BANNER, 1); |
556 | } | |
1853d1ef | 557 | |
efe44db6 | 558 | #ifdef USE_PAM |
559 | monitor_permit(mon_dispatch, MONITOR_REQ_PAM_START, 1); | |
560 | #endif | |
1853d1ef | 561 | |
562 | return (0); | |
563 | } | |
564 | ||
94a73cdc | 565 | int mm_answer_auth2_read_banner(int socket, Buffer *m) |
566 | { | |
567 | char *banner; | |
568 | ||
569 | buffer_clear(m); | |
570 | banner = auth2_read_banner(); | |
571 | buffer_put_cstring(m, banner != NULL ? banner : ""); | |
572 | mm_request_send(socket, MONITOR_ANS_AUTH2_READ_BANNER, m); | |
573 | ||
574 | if (banner != NULL) | |
30e37ee6 | 575 | xfree(banner); |
94a73cdc | 576 | |
577 | return (0); | |
578 | } | |
579 | ||
1853d1ef | 580 | int |
581 | mm_answer_authserv(int socket, Buffer *m) | |
582 | { | |
583 | monitor_permit_authentications(1); | |
584 | ||
585 | authctxt->service = buffer_get_string(m, NULL); | |
586 | authctxt->style = buffer_get_string(m, NULL); | |
587 | debug3("%s: service=%s, style=%s", | |
1588c277 | 588 | __func__, authctxt->service, authctxt->style); |
1853d1ef | 589 | |
590 | if (strlen(authctxt->style) == 0) { | |
591 | xfree(authctxt->style); | |
592 | authctxt->style = NULL; | |
593 | } | |
594 | ||
595 | return (0); | |
596 | } | |
597 | ||
598 | int | |
599 | mm_answer_authpassword(int socket, Buffer *m) | |
600 | { | |
601 | static int call_count; | |
602 | char *passwd; | |
d341742a | 603 | int authenticated; |
604 | u_int plen; | |
1853d1ef | 605 | |
606 | passwd = buffer_get_string(m, &plen); | |
607 | /* Only authenticate if the context is valid */ | |
aa586f8e | 608 | authenticated = options.password_authentication && |
609 | authctxt->valid && auth_password(authctxt, passwd); | |
1853d1ef | 610 | memset(passwd, 0, strlen(passwd)); |
611 | xfree(passwd); | |
612 | ||
613 | buffer_clear(m); | |
614 | buffer_put_int(m, authenticated); | |
615 | ||
1588c277 | 616 | debug3("%s: sending result %d", __func__, authenticated); |
1853d1ef | 617 | mm_request_send(socket, MONITOR_ANS_AUTHPASSWORD, m); |
618 | ||
619 | call_count++; | |
620 | if (plen == 0 && call_count == 1) | |
621 | auth_method = "none"; | |
622 | else | |
623 | auth_method = "password"; | |
624 | ||
625 | /* Causes monitor loop to terminate if authenticated */ | |
626 | return (authenticated); | |
627 | } | |
628 | ||
629 | #ifdef BSD_AUTH | |
630 | int | |
631 | mm_answer_bsdauthquery(int socket, Buffer *m) | |
632 | { | |
633 | char *name, *infotxt; | |
634 | u_int numprompts; | |
635 | u_int *echo_on; | |
636 | char **prompts; | |
637 | int res; | |
638 | ||
639 | res = bsdauth_query(authctxt, &name, &infotxt, &numprompts, | |
640 | &prompts, &echo_on); | |
641 | ||
642 | buffer_clear(m); | |
643 | buffer_put_int(m, res); | |
644 | if (res != -1) | |
645 | buffer_put_cstring(m, prompts[0]); | |
646 | ||
1588c277 | 647 | debug3("%s: sending challenge res: %d", __func__, res); |
1853d1ef | 648 | mm_request_send(socket, MONITOR_ANS_BSDAUTHQUERY, m); |
649 | ||
650 | if (res != -1) { | |
651 | xfree(name); | |
652 | xfree(infotxt); | |
653 | xfree(prompts); | |
654 | xfree(echo_on); | |
655 | } | |
656 | ||
657 | return (0); | |
658 | } | |
659 | ||
660 | int | |
661 | mm_answer_bsdauthrespond(int socket, Buffer *m) | |
662 | { | |
663 | char *response; | |
664 | int authok; | |
665 | ||
666 | if (authctxt->as == 0) | |
1588c277 | 667 | fatal("%s: no bsd auth session", __func__); |
1853d1ef | 668 | |
669 | response = buffer_get_string(m, NULL); | |
aa586f8e | 670 | authok = options.challenge_response_authentication && |
671 | auth_userresponse(authctxt->as, response, 0); | |
1853d1ef | 672 | authctxt->as = NULL; |
1588c277 | 673 | debug3("%s: <%s> = <%d>", __func__, response, authok); |
1853d1ef | 674 | xfree(response); |
675 | ||
676 | buffer_clear(m); | |
677 | buffer_put_int(m, authok); | |
678 | ||
1588c277 | 679 | debug3("%s: sending authenticated: %d", __func__, authok); |
1853d1ef | 680 | mm_request_send(socket, MONITOR_ANS_BSDAUTHRESPOND, m); |
681 | ||
682 | auth_method = "bsdauth"; | |
683 | ||
684 | return (authok != 0); | |
685 | } | |
686 | #endif | |
687 | ||
688 | #ifdef SKEY | |
689 | int | |
690 | mm_answer_skeyquery(int socket, Buffer *m) | |
691 | { | |
692 | struct skey skey; | |
693 | char challenge[1024]; | |
694 | int res; | |
695 | ||
696 | res = skeychallenge(&skey, authctxt->user, challenge); | |
697 | ||
698 | buffer_clear(m); | |
699 | buffer_put_int(m, res); | |
700 | if (res != -1) | |
701 | buffer_put_cstring(m, challenge); | |
702 | ||
1588c277 | 703 | debug3("%s: sending challenge res: %d", __func__, res); |
1853d1ef | 704 | mm_request_send(socket, MONITOR_ANS_SKEYQUERY, m); |
705 | ||
706 | return (0); | |
707 | } | |
708 | ||
709 | int | |
710 | mm_answer_skeyrespond(int socket, Buffer *m) | |
711 | { | |
712 | char *response; | |
713 | int authok; | |
714 | ||
715 | response = buffer_get_string(m, NULL); | |
716 | ||
aa586f8e | 717 | authok = (options.challenge_response_authentication && |
718 | authctxt->valid && | |
1853d1ef | 719 | skey_haskey(authctxt->pw->pw_name) == 0 && |
720 | skey_passcheck(authctxt->pw->pw_name, response) != -1); | |
721 | ||
722 | xfree(response); | |
723 | ||
724 | buffer_clear(m); | |
725 | buffer_put_int(m, authok); | |
726 | ||
1588c277 | 727 | debug3("%s: sending authenticated: %d", __func__, authok); |
1853d1ef | 728 | mm_request_send(socket, MONITOR_ANS_SKEYRESPOND, m); |
729 | ||
730 | auth_method = "skey"; | |
731 | ||
732 | return (authok != 0); | |
733 | } | |
734 | #endif | |
735 | ||
ad200abb | 736 | #ifdef USE_PAM |
737 | int | |
738 | mm_answer_pam_start(int socket, Buffer *m) | |
739 | { | |
740 | char *user; | |
741 | ||
742 | user = buffer_get_string(m, NULL); | |
743 | ||
744 | start_pam(user); | |
745 | ||
746 | xfree(user); | |
747 | ||
748 | return (0); | |
749 | } | |
750 | #endif | |
751 | ||
1853d1ef | 752 | static void |
753 | mm_append_debug(Buffer *m) | |
754 | { | |
755 | if (auth_debug_init && buffer_len(&auth_debug)) { | |
1588c277 | 756 | debug3("%s: Appending debug messages for child", __func__); |
1853d1ef | 757 | buffer_append(m, buffer_ptr(&auth_debug), |
758 | buffer_len(&auth_debug)); | |
759 | buffer_clear(&auth_debug); | |
760 | } | |
761 | } | |
762 | ||
763 | int | |
764 | mm_answer_keyallowed(int socket, Buffer *m) | |
765 | { | |
766 | Key *key; | |
661e45a0 | 767 | char *cuser, *chost; |
768 | u_char *blob; | |
1853d1ef | 769 | u_int bloblen; |
770 | enum mm_keytype type = 0; | |
771 | int allowed = 0; | |
772 | ||
1588c277 | 773 | debug3("%s entering", __func__); |
1853d1ef | 774 | |
775 | type = buffer_get_int(m); | |
776 | cuser = buffer_get_string(m, NULL); | |
777 | chost = buffer_get_string(m, NULL); | |
778 | blob = buffer_get_string(m, &bloblen); | |
779 | ||
780 | key = key_from_blob(blob, bloblen); | |
781 | ||
782 | if ((compat20 && type == MM_RSAHOSTKEY) || | |
783 | (!compat20 && type != MM_RSAHOSTKEY)) | |
1588c277 | 784 | fatal("%s: key type and protocol mismatch", __func__); |
1853d1ef | 785 | |
1588c277 | 786 | debug3("%s: key_from_blob: %p", __func__, key); |
1853d1ef | 787 | |
788 | if (key != NULL && authctxt->pw != NULL) { | |
789 | switch(type) { | |
790 | case MM_USERKEY: | |
aa586f8e | 791 | allowed = options.pubkey_authentication && |
792 | user_key_allowed(authctxt->pw, key); | |
1853d1ef | 793 | break; |
794 | case MM_HOSTKEY: | |
aa586f8e | 795 | allowed = options.hostbased_authentication && |
796 | hostbased_key_allowed(authctxt->pw, | |
1853d1ef | 797 | cuser, chost, key); |
798 | break; | |
799 | case MM_RSAHOSTKEY: | |
800 | key->type = KEY_RSA1; /* XXX */ | |
aa586f8e | 801 | allowed = options.rhosts_rsa_authentication && |
802 | auth_rhosts_rsa_key_allowed(authctxt->pw, | |
1853d1ef | 803 | cuser, chost, key); |
804 | break; | |
805 | default: | |
1588c277 | 806 | fatal("%s: unknown key type %d", __func__, type); |
1853d1ef | 807 | break; |
808 | } | |
809 | key_free(key); | |
810 | } | |
811 | ||
812 | /* clear temporarily storage (used by verify) */ | |
813 | monitor_reset_key_state(); | |
814 | ||
815 | if (allowed) { | |
816 | /* Save temporarily for comparison in verify */ | |
817 | key_blob = blob; | |
818 | key_bloblen = bloblen; | |
819 | key_blobtype = type; | |
820 | hostbased_cuser = cuser; | |
821 | hostbased_chost = chost; | |
822 | } | |
823 | ||
824 | debug3("%s: key %p is %s", | |
1588c277 | 825 | __func__, key, allowed ? "allowed" : "disallowed"); |
1853d1ef | 826 | |
827 | buffer_clear(m); | |
828 | buffer_put_int(m, allowed); | |
829 | ||
830 | mm_append_debug(m); | |
831 | ||
832 | mm_request_send(socket, MONITOR_ANS_KEYALLOWED, m); | |
833 | ||
834 | if (type == MM_RSAHOSTKEY) | |
835 | monitor_permit(mon_dispatch, MONITOR_REQ_RSACHALLENGE, allowed); | |
836 | ||
837 | return (0); | |
838 | } | |
839 | ||
840 | static int | |
841 | monitor_valid_userblob(u_char *data, u_int datalen) | |
842 | { | |
843 | Buffer b; | |
661e45a0 | 844 | char *p; |
1853d1ef | 845 | u_int len; |
846 | int fail = 0; | |
1853d1ef | 847 | |
848 | buffer_init(&b); | |
849 | buffer_append(&b, data, datalen); | |
850 | ||
851 | if (datafellows & SSH_OLD_SESSIONID) { | |
521d606b | 852 | p = buffer_ptr(&b); |
853 | len = buffer_len(&b); | |
854 | if ((session_id2 == NULL) || | |
855 | (len < session_id2_len) || | |
856 | (memcmp(p, session_id2, session_id2_len) != 0)) | |
857 | fail++; | |
1853d1ef | 858 | buffer_consume(&b, session_id2_len); |
859 | } else { | |
521d606b | 860 | p = buffer_get_string(&b, &len); |
861 | if ((session_id2 == NULL) || | |
862 | (len != session_id2_len) || | |
863 | (memcmp(p, session_id2, session_id2_len) != 0)) | |
1853d1ef | 864 | fail++; |
521d606b | 865 | xfree(p); |
1853d1ef | 866 | } |
867 | if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST) | |
868 | fail++; | |
869 | p = buffer_get_string(&b, NULL); | |
870 | if (strcmp(authctxt->user, p) != 0) { | |
871 | log("wrong user name passed to monitor: expected %s != %.100s", | |
872 | authctxt->user, p); | |
873 | fail++; | |
874 | } | |
875 | xfree(p); | |
876 | buffer_skip_string(&b); | |
877 | if (datafellows & SSH_BUG_PKAUTH) { | |
878 | if (!buffer_get_char(&b)) | |
879 | fail++; | |
880 | } else { | |
881 | p = buffer_get_string(&b, NULL); | |
882 | if (strcmp("publickey", p) != 0) | |
883 | fail++; | |
884 | xfree(p); | |
885 | if (!buffer_get_char(&b)) | |
886 | fail++; | |
887 | buffer_skip_string(&b); | |
888 | } | |
889 | buffer_skip_string(&b); | |
890 | if (buffer_len(&b) != 0) | |
891 | fail++; | |
892 | buffer_free(&b); | |
893 | return (fail == 0); | |
894 | } | |
895 | ||
896 | static int | |
661e45a0 | 897 | monitor_valid_hostbasedblob(u_char *data, u_int datalen, char *cuser, |
898 | char *chost) | |
1853d1ef | 899 | { |
900 | Buffer b; | |
661e45a0 | 901 | char *p; |
1853d1ef | 902 | u_int len; |
903 | int fail = 0; | |
1853d1ef | 904 | |
905 | buffer_init(&b); | |
906 | buffer_append(&b, data, datalen); | |
907 | ||
521d606b | 908 | p = buffer_get_string(&b, &len); |
909 | if ((session_id2 == NULL) || | |
910 | (len != session_id2_len) || | |
911 | (memcmp(p, session_id2, session_id2_len) != 0)) | |
1853d1ef | 912 | fail++; |
521d606b | 913 | xfree(p); |
914 | ||
1853d1ef | 915 | if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST) |
916 | fail++; | |
917 | p = buffer_get_string(&b, NULL); | |
918 | if (strcmp(authctxt->user, p) != 0) { | |
919 | log("wrong user name passed to monitor: expected %s != %.100s", | |
920 | authctxt->user, p); | |
921 | fail++; | |
922 | } | |
923 | xfree(p); | |
924 | buffer_skip_string(&b); /* service */ | |
925 | p = buffer_get_string(&b, NULL); | |
926 | if (strcmp(p, "hostbased") != 0) | |
927 | fail++; | |
928 | xfree(p); | |
929 | buffer_skip_string(&b); /* pkalg */ | |
930 | buffer_skip_string(&b); /* pkblob */ | |
931 | ||
932 | /* verify client host, strip trailing dot if necessary */ | |
933 | p = buffer_get_string(&b, NULL); | |
934 | if (((len = strlen(p)) > 0) && p[len - 1] == '.') | |
935 | p[len - 1] = '\0'; | |
936 | if (strcmp(p, chost) != 0) | |
937 | fail++; | |
938 | xfree(p); | |
939 | ||
940 | /* verify client user */ | |
941 | p = buffer_get_string(&b, NULL); | |
942 | if (strcmp(p, cuser) != 0) | |
943 | fail++; | |
944 | xfree(p); | |
945 | ||
946 | if (buffer_len(&b) != 0) | |
947 | fail++; | |
948 | buffer_free(&b); | |
949 | return (fail == 0); | |
950 | } | |
951 | ||
952 | int | |
953 | mm_answer_keyverify(int socket, Buffer *m) | |
954 | { | |
955 | Key *key; | |
956 | u_char *signature, *data, *blob; | |
957 | u_int signaturelen, datalen, bloblen; | |
958 | int verified = 0; | |
959 | int valid_data = 0; | |
960 | ||
961 | blob = buffer_get_string(m, &bloblen); | |
962 | signature = buffer_get_string(m, &signaturelen); | |
963 | data = buffer_get_string(m, &datalen); | |
964 | ||
965 | if (hostbased_cuser == NULL || hostbased_chost == NULL || | |
300e01c4 | 966 | !monitor_allowed_key(blob, bloblen)) |
1588c277 | 967 | fatal("%s: bad key, not previously allowed", __func__); |
1853d1ef | 968 | |
969 | key = key_from_blob(blob, bloblen); | |
970 | if (key == NULL) | |
1588c277 | 971 | fatal("%s: bad public key blob", __func__); |
1853d1ef | 972 | |
973 | switch (key_blobtype) { | |
974 | case MM_USERKEY: | |
975 | valid_data = monitor_valid_userblob(data, datalen); | |
976 | break; | |
977 | case MM_HOSTKEY: | |
978 | valid_data = monitor_valid_hostbasedblob(data, datalen, | |
979 | hostbased_cuser, hostbased_chost); | |
980 | break; | |
981 | default: | |
982 | valid_data = 0; | |
983 | break; | |
984 | } | |
985 | if (!valid_data) | |
1588c277 | 986 | fatal("%s: bad signature data blob", __func__); |
1853d1ef | 987 | |
988 | verified = key_verify(key, signature, signaturelen, data, datalen); | |
989 | debug3("%s: key %p signature %s", | |
1588c277 | 990 | __func__, key, verified ? "verified" : "unverified"); |
1853d1ef | 991 | |
992 | key_free(key); | |
993 | xfree(blob); | |
994 | xfree(signature); | |
995 | xfree(data); | |
996 | ||
d17ef027 | 997 | auth_method = key_blobtype == MM_USERKEY ? "publickey" : "hostbased"; |
998 | ||
1853d1ef | 999 | monitor_reset_key_state(); |
1000 | ||
1001 | buffer_clear(m); | |
1002 | buffer_put_int(m, verified); | |
1003 | mm_request_send(socket, MONITOR_ANS_KEYVERIFY, m); | |
1004 | ||
1853d1ef | 1005 | return (verified); |
1006 | } | |
1007 | ||
1008 | static void | |
1009 | mm_record_login(Session *s, struct passwd *pw) | |
1010 | { | |
1011 | socklen_t fromlen; | |
1012 | struct sockaddr_storage from; | |
1013 | ||
1014 | /* | |
1015 | * Get IP address of client. If the connection is not a socket, let | |
1016 | * the address be 0.0.0.0. | |
1017 | */ | |
1018 | memset(&from, 0, sizeof(from)); | |
ba1566dd | 1019 | fromlen = sizeof(from); |
1853d1ef | 1020 | if (packet_connection_is_on_socket()) { |
1853d1ef | 1021 | if (getpeername(packet_get_connection_in(), |
1022 | (struct sockaddr *) & from, &fromlen) < 0) { | |
1023 | debug("getpeername: %.100s", strerror(errno)); | |
1024 | fatal_cleanup(); | |
1025 | } | |
1026 | } | |
1027 | /* Record that there was a login on that tty from the remote host. */ | |
1028 | record_login(s->pid, s->tty, pw->pw_name, pw->pw_uid, | |
1029 | get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping), | |
ba1566dd | 1030 | (struct sockaddr *)&from, fromlen); |
1853d1ef | 1031 | } |
1032 | ||
1033 | static void | |
1034 | mm_session_close(Session *s) | |
1035 | { | |
1588c277 | 1036 | debug3("%s: session %d pid %d", __func__, s->self, s->pid); |
1853d1ef | 1037 | if (s->ttyfd != -1) { |
1588c277 | 1038 | debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ptyfd); |
1853d1ef | 1039 | fatal_remove_cleanup(session_pty_cleanup2, (void *)s); |
1040 | session_pty_cleanup2(s); | |
1041 | } | |
1042 | s->used = 0; | |
1043 | } | |
1044 | ||
1045 | int | |
1046 | mm_answer_pty(int socket, Buffer *m) | |
1047 | { | |
b5a28cbc | 1048 | extern struct monitor *pmonitor; |
1853d1ef | 1049 | Session *s; |
1050 | int res, fd0; | |
1051 | ||
1588c277 | 1052 | debug3("%s entering", __func__); |
1853d1ef | 1053 | |
1054 | buffer_clear(m); | |
1055 | s = session_new(); | |
1056 | if (s == NULL) | |
1057 | goto error; | |
1058 | s->authctxt = authctxt; | |
1059 | s->pw = authctxt->pw; | |
b5a28cbc | 1060 | s->pid = pmonitor->m_pid; |
1853d1ef | 1061 | res = pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty)); |
1062 | if (res == 0) | |
1063 | goto error; | |
1064 | fatal_add_cleanup(session_pty_cleanup2, (void *)s); | |
1065 | pty_setowner(authctxt->pw, s->tty); | |
1066 | ||
1067 | buffer_put_int(m, 1); | |
1068 | buffer_put_cstring(m, s->tty); | |
1069 | mm_request_send(socket, MONITOR_ANS_PTY, m); | |
1070 | ||
1071 | mm_send_fd(socket, s->ptyfd); | |
1072 | mm_send_fd(socket, s->ttyfd); | |
1073 | ||
1074 | /* We need to trick ttyslot */ | |
1075 | if (dup2(s->ttyfd, 0) == -1) | |
1588c277 | 1076 | fatal("%s: dup2", __func__); |
1853d1ef | 1077 | |
1078 | mm_record_login(s, authctxt->pw); | |
1079 | ||
1080 | /* Now we can close the file descriptor again */ | |
1081 | close(0); | |
1082 | ||
1083 | /* make sure nothing uses fd 0 */ | |
1084 | if ((fd0 = open(_PATH_DEVNULL, O_RDONLY)) < 0) | |
1588c277 | 1085 | fatal("%s: open(/dev/null): %s", __func__, strerror(errno)); |
1853d1ef | 1086 | if (fd0 != 0) |
1588c277 | 1087 | error("%s: fd0 %d != 0", __func__, fd0); |
1853d1ef | 1088 | |
1089 | /* slave is not needed */ | |
1090 | close(s->ttyfd); | |
1091 | s->ttyfd = s->ptyfd; | |
1092 | /* no need to dup() because nobody closes ptyfd */ | |
1093 | s->ptymaster = s->ptyfd; | |
1094 | ||
1588c277 | 1095 | debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ttyfd); |
1853d1ef | 1096 | |
1097 | return (0); | |
1098 | ||
1099 | error: | |
1100 | if (s != NULL) | |
1101 | mm_session_close(s); | |
1102 | buffer_put_int(m, 0); | |
1103 | mm_request_send(socket, MONITOR_ANS_PTY, m); | |
1104 | return (0); | |
1105 | } | |
1106 | ||
1107 | int | |
1108 | mm_answer_pty_cleanup(int socket, Buffer *m) | |
1109 | { | |
1110 | Session *s; | |
1111 | char *tty; | |
1112 | ||
1588c277 | 1113 | debug3("%s entering", __func__); |
1853d1ef | 1114 | |
1115 | tty = buffer_get_string(m, NULL); | |
1116 | if ((s = session_by_tty(tty)) != NULL) | |
1117 | mm_session_close(s); | |
1118 | buffer_clear(m); | |
1119 | xfree(tty); | |
1120 | return (0); | |
1121 | } | |
1122 | ||
1123 | int | |
1124 | mm_answer_sesskey(int socket, Buffer *m) | |
1125 | { | |
1126 | BIGNUM *p; | |
1127 | int rsafail; | |
1128 | ||
1129 | /* Turn off permissions */ | |
1130 | monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 1); | |
1131 | ||
1132 | if ((p = BN_new()) == NULL) | |
1588c277 | 1133 | fatal("%s: BN_new", __func__); |
1853d1ef | 1134 | |
1135 | buffer_get_bignum2(m, p); | |
1136 | ||
1137 | rsafail = ssh1_session_key(p); | |
1138 | ||
1139 | buffer_clear(m); | |
1140 | buffer_put_int(m, rsafail); | |
1141 | buffer_put_bignum2(m, p); | |
1142 | ||
1143 | BN_clear_free(p); | |
1144 | ||
1145 | mm_request_send(socket, MONITOR_ANS_SESSKEY, m); | |
1146 | ||
1147 | /* Turn on permissions for sessid passing */ | |
1148 | monitor_permit(mon_dispatch, MONITOR_REQ_SESSID, 1); | |
1149 | ||
1150 | return (0); | |
1151 | } | |
1152 | ||
1153 | int | |
1154 | mm_answer_sessid(int socket, Buffer *m) | |
1155 | { | |
1156 | int i; | |
1157 | ||
1588c277 | 1158 | debug3("%s entering", __func__); |
1853d1ef | 1159 | |
1160 | if (buffer_len(m) != 16) | |
1588c277 | 1161 | fatal("%s: bad ssh1 session id", __func__); |
1853d1ef | 1162 | for (i = 0; i < 16; i++) |
1163 | session_id[i] = buffer_get_char(m); | |
1164 | ||
1165 | /* Turn on permissions for getpwnam */ | |
1166 | monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1); | |
1167 | ||
1168 | return (0); | |
1169 | } | |
1170 | ||
1171 | int | |
1172 | mm_answer_rsa_keyallowed(int socket, Buffer *m) | |
1173 | { | |
1174 | BIGNUM *client_n; | |
1175 | Key *key = NULL; | |
1176 | u_char *blob = NULL; | |
1177 | u_int blen = 0; | |
1178 | int allowed = 0; | |
1179 | ||
1588c277 | 1180 | debug3("%s entering", __func__); |
1853d1ef | 1181 | |
aa586f8e | 1182 | if (options.rsa_authentication && authctxt->valid) { |
1853d1ef | 1183 | if ((client_n = BN_new()) == NULL) |
1588c277 | 1184 | fatal("%s: BN_new", __func__); |
1853d1ef | 1185 | buffer_get_bignum2(m, client_n); |
1186 | allowed = auth_rsa_key_allowed(authctxt->pw, client_n, &key); | |
1187 | BN_clear_free(client_n); | |
1188 | } | |
1189 | buffer_clear(m); | |
1190 | buffer_put_int(m, allowed); | |
1191 | ||
1192 | /* clear temporarily storage (used by generate challenge) */ | |
1193 | monitor_reset_key_state(); | |
1194 | ||
1195 | if (allowed && key != NULL) { | |
1196 | key->type = KEY_RSA; /* cheat for key_to_blob */ | |
1197 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1198 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1199 | buffer_put_string(m, blob, blen); |
1200 | ||
1201 | /* Save temporarily for comparison in verify */ | |
1202 | key_blob = blob; | |
1203 | key_bloblen = blen; | |
1204 | key_blobtype = MM_RSAUSERKEY; | |
1205 | key_free(key); | |
1206 | } | |
1207 | ||
1208 | mm_append_debug(m); | |
1209 | ||
1210 | mm_request_send(socket, MONITOR_ANS_RSAKEYALLOWED, m); | |
1211 | ||
1212 | monitor_permit(mon_dispatch, MONITOR_REQ_RSACHALLENGE, allowed); | |
1213 | monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 0); | |
1214 | return (0); | |
1215 | } | |
1216 | ||
1217 | int | |
1218 | mm_answer_rsa_challenge(int socket, Buffer *m) | |
1219 | { | |
1220 | Key *key = NULL; | |
1221 | u_char *blob; | |
1222 | u_int blen; | |
1223 | ||
1588c277 | 1224 | debug3("%s entering", __func__); |
1853d1ef | 1225 | |
1226 | if (!authctxt->valid) | |
1588c277 | 1227 | fatal("%s: authctxt not valid", __func__); |
1853d1ef | 1228 | blob = buffer_get_string(m, &blen); |
1229 | if (!monitor_allowed_key(blob, blen)) | |
1588c277 | 1230 | fatal("%s: bad key, not previously allowed", __func__); |
1853d1ef | 1231 | if (key_blobtype != MM_RSAUSERKEY && key_blobtype != MM_RSAHOSTKEY) |
1588c277 | 1232 | fatal("%s: key type mismatch", __func__); |
1853d1ef | 1233 | if ((key = key_from_blob(blob, blen)) == NULL) |
1588c277 | 1234 | fatal("%s: received bad key", __func__); |
1853d1ef | 1235 | |
1236 | if (ssh1_challenge) | |
1237 | BN_clear_free(ssh1_challenge); | |
1238 | ssh1_challenge = auth_rsa_generate_challenge(key); | |
1239 | ||
1240 | buffer_clear(m); | |
1241 | buffer_put_bignum2(m, ssh1_challenge); | |
1242 | ||
1588c277 | 1243 | debug3("%s sending reply", __func__); |
1853d1ef | 1244 | mm_request_send(socket, MONITOR_ANS_RSACHALLENGE, m); |
1245 | ||
1246 | monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 1); | |
1247 | return (0); | |
1248 | } | |
1249 | ||
1250 | int | |
1251 | mm_answer_rsa_response(int socket, Buffer *m) | |
1252 | { | |
1253 | Key *key = NULL; | |
1254 | u_char *blob, *response; | |
1255 | u_int blen, len; | |
1256 | int success; | |
1257 | ||
1588c277 | 1258 | debug3("%s entering", __func__); |
1853d1ef | 1259 | |
1260 | if (!authctxt->valid) | |
1588c277 | 1261 | fatal("%s: authctxt not valid", __func__); |
1853d1ef | 1262 | if (ssh1_challenge == NULL) |
1588c277 | 1263 | fatal("%s: no ssh1_challenge", __func__); |
1853d1ef | 1264 | |
1265 | blob = buffer_get_string(m, &blen); | |
1266 | if (!monitor_allowed_key(blob, blen)) | |
1588c277 | 1267 | fatal("%s: bad key, not previously allowed", __func__); |
1853d1ef | 1268 | if (key_blobtype != MM_RSAUSERKEY && key_blobtype != MM_RSAHOSTKEY) |
1588c277 | 1269 | fatal("%s: key type mismatch: %d", __func__, key_blobtype); |
1853d1ef | 1270 | if ((key = key_from_blob(blob, blen)) == NULL) |
1588c277 | 1271 | fatal("%s: received bad key", __func__); |
1853d1ef | 1272 | response = buffer_get_string(m, &len); |
1273 | if (len != 16) | |
1588c277 | 1274 | fatal("%s: received bad response to challenge", __func__); |
1853d1ef | 1275 | success = auth_rsa_verify_response(key, ssh1_challenge, response); |
1276 | ||
1277 | key_free(key); | |
1278 | xfree(response); | |
1279 | ||
1280 | auth_method = key_blobtype == MM_RSAUSERKEY ? "rsa" : "rhosts-rsa"; | |
1281 | ||
1282 | /* reset state */ | |
1283 | BN_clear_free(ssh1_challenge); | |
1284 | ssh1_challenge = NULL; | |
1285 | monitor_reset_key_state(); | |
1286 | ||
1287 | buffer_clear(m); | |
1288 | buffer_put_int(m, success); | |
1289 | mm_request_send(socket, MONITOR_ANS_RSARESPONSE, m); | |
1290 | ||
1291 | return (success); | |
1292 | } | |
1293 | ||
2db9d8aa | 1294 | #ifdef KRB4 |
1295 | int | |
1296 | mm_answer_krb4(int socket, Buffer *m) | |
1297 | { | |
1298 | KTEXT_ST auth, reply; | |
1299 | char *client, *p; | |
1300 | int success; | |
1301 | u_int alen; | |
1302 | ||
1303 | reply.length = auth.length = 0; | |
1304 | ||
1305 | p = buffer_get_string(m, &alen); | |
1306 | if (alen >= MAX_KTXT_LEN) | |
1307 | fatal("%s: auth too large", __func__); | |
1308 | memcpy(auth.dat, p, alen); | |
1309 | auth.length = alen; | |
1310 | memset(p, 0, alen); | |
1311 | xfree(p); | |
1312 | ||
1313 | success = options.kerberos_authentication && | |
1314 | authctxt->valid && | |
1315 | auth_krb4(authctxt, &auth, &client, &reply); | |
1316 | ||
1317 | memset(auth.dat, 0, alen); | |
1318 | buffer_clear(m); | |
1319 | buffer_put_int(m, success); | |
1320 | ||
1321 | if (success) { | |
1322 | buffer_put_cstring(m, client); | |
1323 | buffer_put_string(m, reply.dat, reply.length); | |
1324 | if (client) | |
1325 | xfree(client); | |
1326 | if (reply.length) | |
1327 | memset(reply.dat, 0, reply.length); | |
1328 | } | |
1329 | ||
1330 | debug3("%s: sending result %d", __func__, success); | |
1331 | mm_request_send(socket, MONITOR_ANS_KRB4, m); | |
1332 | ||
1333 | auth_method = "kerberos"; | |
1334 | ||
1335 | /* Causes monitor loop to terminate if authenticated */ | |
1336 | return (success); | |
1337 | } | |
1338 | #endif | |
696f6bef | 1339 | |
1340 | #ifdef KRB5 | |
1341 | int | |
1342 | mm_answer_krb5(int socket, Buffer *m) | |
1343 | { | |
1344 | krb5_data tkt, reply; | |
1345 | char *client_user; | |
1346 | u_int len; | |
1347 | int success; | |
1348 | ||
1349 | /* use temporary var to avoid size issues on 64bit arch */ | |
1350 | tkt.data = buffer_get_string(m, &len); | |
1351 | tkt.length = len; | |
1352 | ||
4741e3a6 | 1353 | success = options.kerberos_authentication && |
1354 | authctxt->valid && | |
0082ad34 | 1355 | auth_krb5(authctxt, &tkt, &client_user, &reply); |
696f6bef | 1356 | |
1357 | if (tkt.length) | |
1358 | xfree(tkt.data); | |
1359 | ||
1360 | buffer_clear(m); | |
1361 | buffer_put_int(m, success); | |
1362 | ||
1363 | if (success) { | |
1364 | buffer_put_cstring(m, client_user); | |
1365 | buffer_put_string(m, reply.data, reply.length); | |
1366 | if (client_user) | |
1367 | xfree(client_user); | |
1368 | if (reply.length) | |
1369 | xfree(reply.data); | |
1370 | } | |
1371 | mm_request_send(socket, MONITOR_ANS_KRB5, m); | |
1372 | ||
1373 | return success; | |
1374 | } | |
1375 | #endif | |
1376 | ||
1853d1ef | 1377 | int |
1378 | mm_answer_term(int socket, Buffer *req) | |
1379 | { | |
b5a28cbc | 1380 | extern struct monitor *pmonitor; |
1853d1ef | 1381 | int res, status; |
1382 | ||
1588c277 | 1383 | debug3("%s: tearing down sessions", __func__); |
1853d1ef | 1384 | |
1385 | /* The child is terminating */ | |
1386 | session_destroy_all(&mm_session_close); | |
1387 | ||
b5a28cbc | 1388 | while (waitpid(pmonitor->m_pid, &status, 0) == -1) |
8c38e88b | 1389 | if (errno != EINTR) |
1390 | exit(1); | |
1853d1ef | 1391 | |
1392 | res = WIFEXITED(status) ? WEXITSTATUS(status) : 1; | |
1393 | ||
1394 | /* Terminate process */ | |
1395 | exit (res); | |
1396 | } | |
1397 | ||
1398 | void | |
b5a28cbc | 1399 | monitor_apply_keystate(struct monitor *pmonitor) |
1853d1ef | 1400 | { |
1401 | if (compat20) { | |
1402 | set_newkeys(MODE_IN); | |
1403 | set_newkeys(MODE_OUT); | |
1404 | } else { | |
1853d1ef | 1405 | packet_set_protocol_flags(child_state.ssh1protoflags); |
9459414c | 1406 | packet_set_encryption_key(child_state.ssh1key, |
1407 | child_state.ssh1keylen, child_state.ssh1cipher); | |
1408 | xfree(child_state.ssh1key); | |
1853d1ef | 1409 | } |
1410 | ||
9459414c | 1411 | /* for rc4 and other stateful ciphers */ |
1853d1ef | 1412 | packet_set_keycontext(MODE_OUT, child_state.keyout); |
1413 | xfree(child_state.keyout); | |
1414 | packet_set_keycontext(MODE_IN, child_state.keyin); | |
1415 | xfree(child_state.keyin); | |
1416 | ||
1417 | if (!compat20) { | |
1418 | packet_set_iv(MODE_OUT, child_state.ivout); | |
1419 | xfree(child_state.ivout); | |
1420 | packet_set_iv(MODE_IN, child_state.ivin); | |
1421 | xfree(child_state.ivin); | |
1422 | } | |
1423 | ||
1424 | memcpy(&incoming_stream, &child_state.incoming, | |
1425 | sizeof(incoming_stream)); | |
1426 | memcpy(&outgoing_stream, &child_state.outgoing, | |
1427 | sizeof(outgoing_stream)); | |
1428 | ||
1429 | /* Update with new address */ | |
0496cf34 | 1430 | if (options.compression) |
1431 | mm_init_compression(pmonitor->m_zlib); | |
1853d1ef | 1432 | |
1433 | /* Network I/O buffers */ | |
1434 | /* XXX inefficient for large buffers, need: buffer_init_from_string */ | |
1435 | buffer_clear(&input); | |
1436 | buffer_append(&input, child_state.input, child_state.ilen); | |
1437 | memset(child_state.input, 0, child_state.ilen); | |
1438 | xfree(child_state.input); | |
1439 | ||
1440 | buffer_clear(&output); | |
1441 | buffer_append(&output, child_state.output, child_state.olen); | |
1442 | memset(child_state.output, 0, child_state.olen); | |
1443 | xfree(child_state.output); | |
1444 | } | |
1445 | ||
1446 | static Kex * | |
1447 | mm_get_kex(Buffer *m) | |
1448 | { | |
1449 | Kex *kex; | |
1450 | void *blob; | |
1451 | u_int bloblen; | |
1452 | ||
1453 | kex = xmalloc(sizeof(*kex)); | |
1454 | memset(kex, 0, sizeof(*kex)); | |
1455 | kex->session_id = buffer_get_string(m, &kex->session_id_len); | |
521d606b | 1456 | if ((session_id2 == NULL) || |
1457 | (kex->session_id_len != session_id2_len) || | |
1458 | (memcmp(kex->session_id, session_id2, session_id2_len) != 0)) | |
1459 | fatal("mm_get_get: internal error: bad session id"); | |
1853d1ef | 1460 | kex->we_need = buffer_get_int(m); |
1461 | kex->server = 1; | |
1462 | kex->hostkey_type = buffer_get_int(m); | |
1463 | kex->kex_type = buffer_get_int(m); | |
1464 | blob = buffer_get_string(m, &bloblen); | |
1465 | buffer_init(&kex->my); | |
1466 | buffer_append(&kex->my, blob, bloblen); | |
1467 | xfree(blob); | |
1468 | blob = buffer_get_string(m, &bloblen); | |
1469 | buffer_init(&kex->peer); | |
1470 | buffer_append(&kex->peer, blob, bloblen); | |
1471 | xfree(blob); | |
1472 | kex->done = 1; | |
1473 | kex->flags = buffer_get_int(m); | |
1474 | kex->client_version_string = buffer_get_string(m, NULL); | |
1475 | kex->server_version_string = buffer_get_string(m, NULL); | |
1476 | kex->load_host_key=&get_hostkey_by_type; | |
1477 | kex->host_key_index=&get_hostkey_index; | |
1478 | ||
1479 | return (kex); | |
1480 | } | |
1481 | ||
1482 | /* This function requries careful sanity checking */ | |
1483 | ||
1484 | void | |
b5a28cbc | 1485 | mm_get_keystate(struct monitor *pmonitor) |
1853d1ef | 1486 | { |
1487 | Buffer m; | |
1488 | u_char *blob, *p; | |
1489 | u_int bloblen, plen; | |
1490 | ||
1588c277 | 1491 | debug3("%s: Waiting for new keys", __func__); |
1853d1ef | 1492 | |
1493 | buffer_init(&m); | |
b5a28cbc | 1494 | mm_request_receive_expect(pmonitor->m_sendfd, MONITOR_REQ_KEYEXPORT, &m); |
1853d1ef | 1495 | if (!compat20) { |
1496 | child_state.ssh1protoflags = buffer_get_int(&m); | |
1497 | child_state.ssh1cipher = buffer_get_int(&m); | |
9459414c | 1498 | child_state.ssh1key = buffer_get_string(&m, |
1499 | &child_state.ssh1keylen); | |
1853d1ef | 1500 | child_state.ivout = buffer_get_string(&m, |
1501 | &child_state.ivoutlen); | |
1502 | child_state.ivin = buffer_get_string(&m, &child_state.ivinlen); | |
1503 | goto skip; | |
1504 | } else { | |
1505 | /* Get the Kex for rekeying */ | |
b5a28cbc | 1506 | *pmonitor->m_pkex = mm_get_kex(&m); |
1853d1ef | 1507 | } |
1508 | ||
1509 | blob = buffer_get_string(&m, &bloblen); | |
1510 | current_keys[MODE_OUT] = mm_newkeys_from_blob(blob, bloblen); | |
1511 | xfree(blob); | |
1512 | ||
1588c277 | 1513 | debug3("%s: Waiting for second key", __func__); |
1853d1ef | 1514 | blob = buffer_get_string(&m, &bloblen); |
1515 | current_keys[MODE_IN] = mm_newkeys_from_blob(blob, bloblen); | |
1516 | xfree(blob); | |
1517 | ||
1518 | /* Now get sequence numbers for the packets */ | |
1519 | packet_set_seqnr(MODE_OUT, buffer_get_int(&m)); | |
1520 | packet_set_seqnr(MODE_IN, buffer_get_int(&m)); | |
1521 | ||
1522 | skip: | |
1523 | /* Get the key context */ | |
1524 | child_state.keyout = buffer_get_string(&m, &child_state.keyoutlen); | |
1525 | child_state.keyin = buffer_get_string(&m, &child_state.keyinlen); | |
1526 | ||
1588c277 | 1527 | debug3("%s: Getting compression state", __func__); |
1853d1ef | 1528 | /* Get compression state */ |
1529 | p = buffer_get_string(&m, &plen); | |
1530 | if (plen != sizeof(child_state.outgoing)) | |
1588c277 | 1531 | fatal("%s: bad request size", __func__); |
1853d1ef | 1532 | memcpy(&child_state.outgoing, p, sizeof(child_state.outgoing)); |
1533 | xfree(p); | |
1534 | ||
1535 | p = buffer_get_string(&m, &plen); | |
1536 | if (plen != sizeof(child_state.incoming)) | |
1588c277 | 1537 | fatal("%s: bad request size", __func__); |
1853d1ef | 1538 | memcpy(&child_state.incoming, p, sizeof(child_state.incoming)); |
1539 | xfree(p); | |
1540 | ||
1541 | /* Network I/O buffers */ | |
1588c277 | 1542 | debug3("%s: Getting Network I/O buffers", __func__); |
1853d1ef | 1543 | child_state.input = buffer_get_string(&m, &child_state.ilen); |
1544 | child_state.output = buffer_get_string(&m, &child_state.olen); | |
1545 | ||
1546 | buffer_free(&m); | |
1547 | } | |
1548 | ||
1549 | ||
1550 | /* Allocation functions for zlib */ | |
1551 | void * | |
1552 | mm_zalloc(struct mm_master *mm, u_int ncount, u_int size) | |
1553 | { | |
b85698ab | 1554 | size_t len = size * ncount; |
1853d1ef | 1555 | void *address; |
1556 | ||
b85698ab | 1557 | if (len == 0 || ncount > SIZE_T_MAX / size) |
2f095a0e | 1558 | fatal("%s: mm_zalloc(%u, %u)", __func__, ncount, size); |
1559 | ||
1560 | address = mm_malloc(mm, len); | |
1853d1ef | 1561 | |
1562 | return (address); | |
1563 | } | |
1564 | ||
1565 | void | |
1566 | mm_zfree(struct mm_master *mm, void *address) | |
1567 | { | |
1568 | mm_free(mm, address); | |
1569 | } | |
1570 | ||
1571 | void | |
1572 | mm_init_compression(struct mm_master *mm) | |
1573 | { | |
1574 | outgoing_stream.zalloc = (alloc_func)mm_zalloc; | |
1575 | outgoing_stream.zfree = (free_func)mm_zfree; | |
1576 | outgoing_stream.opaque = mm; | |
1577 | ||
1578 | incoming_stream.zalloc = (alloc_func)mm_zalloc; | |
1579 | incoming_stream.zfree = (free_func)mm_zfree; | |
1580 | incoming_stream.opaque = mm; | |
1581 | } | |
1582 | ||
1583 | /* XXX */ | |
1584 | ||
1585 | #define FD_CLOSEONEXEC(x) do { \ | |
1586 | if (fcntl(x, F_SETFD, 1) == -1) \ | |
1587 | fatal("fcntl(%d, F_SETFD)", x); \ | |
1588 | } while (0) | |
1589 | ||
1590 | static void | |
1591 | monitor_socketpair(int *pair) | |
1592 | { | |
f1af2dbf | 1593 | #ifdef HAVE_SOCKETPAIR |
1853d1ef | 1594 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1) |
1588c277 | 1595 | fatal("%s: socketpair", __func__); |
f1af2dbf | 1596 | #else |
1597 | fatal("%s: UsePrivilegeSeparation=yes not supported", | |
1588c277 | 1598 | __func__); |
f1af2dbf | 1599 | #endif |
1853d1ef | 1600 | FD_CLOSEONEXEC(pair[0]); |
1601 | FD_CLOSEONEXEC(pair[1]); | |
1602 | } | |
1603 | ||
1604 | #define MM_MEMSIZE 65536 | |
1605 | ||
1606 | struct monitor * | |
1607 | monitor_init(void) | |
1608 | { | |
1609 | struct monitor *mon; | |
1610 | int pair[2]; | |
1611 | ||
1612 | mon = xmalloc(sizeof(*mon)); | |
1613 | ||
1614 | monitor_socketpair(pair); | |
1615 | ||
1616 | mon->m_recvfd = pair[0]; | |
1617 | mon->m_sendfd = pair[1]; | |
1618 | ||
1619 | /* Used to share zlib space across processes */ | |
0496cf34 | 1620 | if (options.compression) { |
1621 | mon->m_zback = mm_create(NULL, MM_MEMSIZE); | |
1622 | mon->m_zlib = mm_create(mon->m_zback, 20 * MM_MEMSIZE); | |
1853d1ef | 1623 | |
0496cf34 | 1624 | /* Compression needs to share state across borders */ |
1625 | mm_init_compression(mon->m_zlib); | |
1626 | } | |
1853d1ef | 1627 | |
1628 | return mon; | |
1629 | } | |
1630 | ||
1631 | void | |
1632 | monitor_reinit(struct monitor *mon) | |
1633 | { | |
1634 | int pair[2]; | |
1635 | ||
1636 | monitor_socketpair(pair); | |
1637 | ||
1638 | mon->m_recvfd = pair[0]; | |
1639 | mon->m_sendfd = pair[1]; | |
1640 | } |