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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" | |
3e2f2431 | 28 | RCSID("$OpenBSD: monitor.c,v 1.33 2003/03/05 22:33:43 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; | |
6d6c25e3 | 637 | u_int success; |
1853d1ef | 638 | |
6d6c25e3 | 639 | success = bsdauth_query(authctxt, &name, &infotxt, &numprompts, |
640 | &prompts, &echo_on) < 0 ? 0 : 1; | |
1853d1ef | 641 | |
642 | buffer_clear(m); | |
6d6c25e3 | 643 | buffer_put_int(m, success); |
644 | if (success) | |
1853d1ef | 645 | buffer_put_cstring(m, prompts[0]); |
646 | ||
6d6c25e3 | 647 | debug3("%s: sending challenge success: %u", __func__, success); |
1853d1ef | 648 | mm_request_send(socket, MONITOR_ANS_BSDAUTHQUERY, m); |
649 | ||
6d6c25e3 | 650 | if (success) { |
1853d1ef | 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]; | |
6d6c25e3 | 694 | u_int success; |
1853d1ef | 695 | |
6d6c25e3 | 696 | success = skeychallenge(&skey, authctxt->user, challenge) < 0 ? 0 : 1; |
1853d1ef | 697 | |
698 | buffer_clear(m); | |
6d6c25e3 | 699 | buffer_put_int(m, success); |
700 | if (success) | |
1853d1ef | 701 | buffer_put_cstring(m, challenge); |
702 | ||
6d6c25e3 | 703 | debug3("%s: sending challenge success: %u", __func__, success); |
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 | } | |
1853d1ef | 809 | } |
3e2f2431 | 810 | if (key != NULL) |
811 | key_free(key); | |
1853d1ef | 812 | |
813 | /* clear temporarily storage (used by verify) */ | |
814 | monitor_reset_key_state(); | |
815 | ||
816 | if (allowed) { | |
817 | /* Save temporarily for comparison in verify */ | |
818 | key_blob = blob; | |
819 | key_bloblen = bloblen; | |
820 | key_blobtype = type; | |
821 | hostbased_cuser = cuser; | |
822 | hostbased_chost = chost; | |
823 | } | |
824 | ||
825 | debug3("%s: key %p is %s", | |
1588c277 | 826 | __func__, key, allowed ? "allowed" : "disallowed"); |
1853d1ef | 827 | |
828 | buffer_clear(m); | |
829 | buffer_put_int(m, allowed); | |
92e15201 | 830 | buffer_put_int(m, forced_command != NULL); |
1853d1ef | 831 | |
832 | mm_append_debug(m); | |
833 | ||
834 | mm_request_send(socket, MONITOR_ANS_KEYALLOWED, m); | |
835 | ||
836 | if (type == MM_RSAHOSTKEY) | |
837 | monitor_permit(mon_dispatch, MONITOR_REQ_RSACHALLENGE, allowed); | |
838 | ||
839 | return (0); | |
840 | } | |
841 | ||
842 | static int | |
843 | monitor_valid_userblob(u_char *data, u_int datalen) | |
844 | { | |
845 | Buffer b; | |
661e45a0 | 846 | char *p; |
1853d1ef | 847 | u_int len; |
848 | int fail = 0; | |
1853d1ef | 849 | |
850 | buffer_init(&b); | |
851 | buffer_append(&b, data, datalen); | |
852 | ||
853 | if (datafellows & SSH_OLD_SESSIONID) { | |
521d606b | 854 | p = buffer_ptr(&b); |
855 | len = buffer_len(&b); | |
856 | if ((session_id2 == NULL) || | |
857 | (len < session_id2_len) || | |
858 | (memcmp(p, session_id2, session_id2_len) != 0)) | |
859 | fail++; | |
1853d1ef | 860 | buffer_consume(&b, session_id2_len); |
861 | } else { | |
521d606b | 862 | p = buffer_get_string(&b, &len); |
863 | if ((session_id2 == NULL) || | |
864 | (len != session_id2_len) || | |
865 | (memcmp(p, session_id2, session_id2_len) != 0)) | |
1853d1ef | 866 | fail++; |
521d606b | 867 | xfree(p); |
1853d1ef | 868 | } |
869 | if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST) | |
870 | fail++; | |
871 | p = buffer_get_string(&b, NULL); | |
872 | if (strcmp(authctxt->user, p) != 0) { | |
873 | log("wrong user name passed to monitor: expected %s != %.100s", | |
874 | authctxt->user, p); | |
875 | fail++; | |
876 | } | |
877 | xfree(p); | |
878 | buffer_skip_string(&b); | |
879 | if (datafellows & SSH_BUG_PKAUTH) { | |
880 | if (!buffer_get_char(&b)) | |
881 | fail++; | |
882 | } else { | |
883 | p = buffer_get_string(&b, NULL); | |
884 | if (strcmp("publickey", p) != 0) | |
885 | fail++; | |
886 | xfree(p); | |
887 | if (!buffer_get_char(&b)) | |
888 | fail++; | |
889 | buffer_skip_string(&b); | |
890 | } | |
891 | buffer_skip_string(&b); | |
892 | if (buffer_len(&b) != 0) | |
893 | fail++; | |
894 | buffer_free(&b); | |
895 | return (fail == 0); | |
896 | } | |
897 | ||
898 | static int | |
661e45a0 | 899 | monitor_valid_hostbasedblob(u_char *data, u_int datalen, char *cuser, |
900 | char *chost) | |
1853d1ef | 901 | { |
902 | Buffer b; | |
661e45a0 | 903 | char *p; |
1853d1ef | 904 | u_int len; |
905 | int fail = 0; | |
1853d1ef | 906 | |
907 | buffer_init(&b); | |
908 | buffer_append(&b, data, datalen); | |
909 | ||
521d606b | 910 | p = buffer_get_string(&b, &len); |
911 | if ((session_id2 == NULL) || | |
912 | (len != session_id2_len) || | |
913 | (memcmp(p, session_id2, session_id2_len) != 0)) | |
1853d1ef | 914 | fail++; |
521d606b | 915 | xfree(p); |
916 | ||
1853d1ef | 917 | if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST) |
918 | fail++; | |
919 | p = buffer_get_string(&b, NULL); | |
920 | if (strcmp(authctxt->user, p) != 0) { | |
921 | log("wrong user name passed to monitor: expected %s != %.100s", | |
922 | authctxt->user, p); | |
923 | fail++; | |
924 | } | |
925 | xfree(p); | |
926 | buffer_skip_string(&b); /* service */ | |
927 | p = buffer_get_string(&b, NULL); | |
928 | if (strcmp(p, "hostbased") != 0) | |
929 | fail++; | |
930 | xfree(p); | |
931 | buffer_skip_string(&b); /* pkalg */ | |
932 | buffer_skip_string(&b); /* pkblob */ | |
933 | ||
934 | /* verify client host, strip trailing dot if necessary */ | |
935 | p = buffer_get_string(&b, NULL); | |
936 | if (((len = strlen(p)) > 0) && p[len - 1] == '.') | |
937 | p[len - 1] = '\0'; | |
938 | if (strcmp(p, chost) != 0) | |
939 | fail++; | |
940 | xfree(p); | |
941 | ||
942 | /* verify client user */ | |
943 | p = buffer_get_string(&b, NULL); | |
944 | if (strcmp(p, cuser) != 0) | |
945 | fail++; | |
946 | xfree(p); | |
947 | ||
948 | if (buffer_len(&b) != 0) | |
949 | fail++; | |
950 | buffer_free(&b); | |
951 | return (fail == 0); | |
952 | } | |
953 | ||
954 | int | |
955 | mm_answer_keyverify(int socket, Buffer *m) | |
956 | { | |
957 | Key *key; | |
958 | u_char *signature, *data, *blob; | |
959 | u_int signaturelen, datalen, bloblen; | |
960 | int verified = 0; | |
961 | int valid_data = 0; | |
962 | ||
963 | blob = buffer_get_string(m, &bloblen); | |
964 | signature = buffer_get_string(m, &signaturelen); | |
965 | data = buffer_get_string(m, &datalen); | |
966 | ||
967 | if (hostbased_cuser == NULL || hostbased_chost == NULL || | |
300e01c4 | 968 | !monitor_allowed_key(blob, bloblen)) |
1588c277 | 969 | fatal("%s: bad key, not previously allowed", __func__); |
1853d1ef | 970 | |
971 | key = key_from_blob(blob, bloblen); | |
972 | if (key == NULL) | |
1588c277 | 973 | fatal("%s: bad public key blob", __func__); |
1853d1ef | 974 | |
975 | switch (key_blobtype) { | |
976 | case MM_USERKEY: | |
977 | valid_data = monitor_valid_userblob(data, datalen); | |
978 | break; | |
979 | case MM_HOSTKEY: | |
980 | valid_data = monitor_valid_hostbasedblob(data, datalen, | |
981 | hostbased_cuser, hostbased_chost); | |
982 | break; | |
983 | default: | |
984 | valid_data = 0; | |
985 | break; | |
986 | } | |
987 | if (!valid_data) | |
1588c277 | 988 | fatal("%s: bad signature data blob", __func__); |
1853d1ef | 989 | |
990 | verified = key_verify(key, signature, signaturelen, data, datalen); | |
991 | debug3("%s: key %p signature %s", | |
1588c277 | 992 | __func__, key, verified ? "verified" : "unverified"); |
1853d1ef | 993 | |
994 | key_free(key); | |
995 | xfree(blob); | |
996 | xfree(signature); | |
997 | xfree(data); | |
998 | ||
d17ef027 | 999 | auth_method = key_blobtype == MM_USERKEY ? "publickey" : "hostbased"; |
1000 | ||
1853d1ef | 1001 | monitor_reset_key_state(); |
1002 | ||
1003 | buffer_clear(m); | |
1004 | buffer_put_int(m, verified); | |
1005 | mm_request_send(socket, MONITOR_ANS_KEYVERIFY, m); | |
1006 | ||
1853d1ef | 1007 | return (verified); |
1008 | } | |
1009 | ||
1010 | static void | |
1011 | mm_record_login(Session *s, struct passwd *pw) | |
1012 | { | |
1013 | socklen_t fromlen; | |
1014 | struct sockaddr_storage from; | |
1015 | ||
1016 | /* | |
1017 | * Get IP address of client. If the connection is not a socket, let | |
1018 | * the address be 0.0.0.0. | |
1019 | */ | |
1020 | memset(&from, 0, sizeof(from)); | |
ba1566dd | 1021 | fromlen = sizeof(from); |
1853d1ef | 1022 | if (packet_connection_is_on_socket()) { |
1853d1ef | 1023 | if (getpeername(packet_get_connection_in(), |
1024 | (struct sockaddr *) & from, &fromlen) < 0) { | |
1025 | debug("getpeername: %.100s", strerror(errno)); | |
1026 | fatal_cleanup(); | |
1027 | } | |
1028 | } | |
1029 | /* Record that there was a login on that tty from the remote host. */ | |
1030 | record_login(s->pid, s->tty, pw->pw_name, pw->pw_uid, | |
1031 | get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping), | |
ba1566dd | 1032 | (struct sockaddr *)&from, fromlen); |
1853d1ef | 1033 | } |
1034 | ||
1035 | static void | |
1036 | mm_session_close(Session *s) | |
1037 | { | |
1588c277 | 1038 | debug3("%s: session %d pid %d", __func__, s->self, s->pid); |
1853d1ef | 1039 | if (s->ttyfd != -1) { |
1588c277 | 1040 | debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ptyfd); |
1853d1ef | 1041 | fatal_remove_cleanup(session_pty_cleanup2, (void *)s); |
1042 | session_pty_cleanup2(s); | |
1043 | } | |
1044 | s->used = 0; | |
1045 | } | |
1046 | ||
1047 | int | |
1048 | mm_answer_pty(int socket, Buffer *m) | |
1049 | { | |
b5a28cbc | 1050 | extern struct monitor *pmonitor; |
1853d1ef | 1051 | Session *s; |
1052 | int res, fd0; | |
1053 | ||
1588c277 | 1054 | debug3("%s entering", __func__); |
1853d1ef | 1055 | |
1056 | buffer_clear(m); | |
1057 | s = session_new(); | |
1058 | if (s == NULL) | |
1059 | goto error; | |
1060 | s->authctxt = authctxt; | |
1061 | s->pw = authctxt->pw; | |
b5a28cbc | 1062 | s->pid = pmonitor->m_pid; |
1853d1ef | 1063 | res = pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty)); |
1064 | if (res == 0) | |
1065 | goto error; | |
1066 | fatal_add_cleanup(session_pty_cleanup2, (void *)s); | |
1067 | pty_setowner(authctxt->pw, s->tty); | |
1068 | ||
1069 | buffer_put_int(m, 1); | |
1070 | buffer_put_cstring(m, s->tty); | |
1071 | mm_request_send(socket, MONITOR_ANS_PTY, m); | |
1072 | ||
1073 | mm_send_fd(socket, s->ptyfd); | |
1074 | mm_send_fd(socket, s->ttyfd); | |
1075 | ||
1076 | /* We need to trick ttyslot */ | |
1077 | if (dup2(s->ttyfd, 0) == -1) | |
1588c277 | 1078 | fatal("%s: dup2", __func__); |
1853d1ef | 1079 | |
1080 | mm_record_login(s, authctxt->pw); | |
1081 | ||
1082 | /* Now we can close the file descriptor again */ | |
1083 | close(0); | |
1084 | ||
1085 | /* make sure nothing uses fd 0 */ | |
1086 | if ((fd0 = open(_PATH_DEVNULL, O_RDONLY)) < 0) | |
1588c277 | 1087 | fatal("%s: open(/dev/null): %s", __func__, strerror(errno)); |
1853d1ef | 1088 | if (fd0 != 0) |
1588c277 | 1089 | error("%s: fd0 %d != 0", __func__, fd0); |
1853d1ef | 1090 | |
1091 | /* slave is not needed */ | |
1092 | close(s->ttyfd); | |
1093 | s->ttyfd = s->ptyfd; | |
1094 | /* no need to dup() because nobody closes ptyfd */ | |
1095 | s->ptymaster = s->ptyfd; | |
1096 | ||
1588c277 | 1097 | debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ttyfd); |
1853d1ef | 1098 | |
1099 | return (0); | |
1100 | ||
1101 | error: | |
1102 | if (s != NULL) | |
1103 | mm_session_close(s); | |
1104 | buffer_put_int(m, 0); | |
1105 | mm_request_send(socket, MONITOR_ANS_PTY, m); | |
1106 | return (0); | |
1107 | } | |
1108 | ||
1109 | int | |
1110 | mm_answer_pty_cleanup(int socket, Buffer *m) | |
1111 | { | |
1112 | Session *s; | |
1113 | char *tty; | |
1114 | ||
1588c277 | 1115 | debug3("%s entering", __func__); |
1853d1ef | 1116 | |
1117 | tty = buffer_get_string(m, NULL); | |
1118 | if ((s = session_by_tty(tty)) != NULL) | |
1119 | mm_session_close(s); | |
1120 | buffer_clear(m); | |
1121 | xfree(tty); | |
1122 | return (0); | |
1123 | } | |
1124 | ||
1125 | int | |
1126 | mm_answer_sesskey(int socket, Buffer *m) | |
1127 | { | |
1128 | BIGNUM *p; | |
1129 | int rsafail; | |
1130 | ||
1131 | /* Turn off permissions */ | |
1132 | monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 1); | |
1133 | ||
1134 | if ((p = BN_new()) == NULL) | |
1588c277 | 1135 | fatal("%s: BN_new", __func__); |
1853d1ef | 1136 | |
1137 | buffer_get_bignum2(m, p); | |
1138 | ||
1139 | rsafail = ssh1_session_key(p); | |
1140 | ||
1141 | buffer_clear(m); | |
1142 | buffer_put_int(m, rsafail); | |
1143 | buffer_put_bignum2(m, p); | |
1144 | ||
1145 | BN_clear_free(p); | |
1146 | ||
1147 | mm_request_send(socket, MONITOR_ANS_SESSKEY, m); | |
1148 | ||
1149 | /* Turn on permissions for sessid passing */ | |
1150 | monitor_permit(mon_dispatch, MONITOR_REQ_SESSID, 1); | |
1151 | ||
1152 | return (0); | |
1153 | } | |
1154 | ||
1155 | int | |
1156 | mm_answer_sessid(int socket, Buffer *m) | |
1157 | { | |
1158 | int i; | |
1159 | ||
1588c277 | 1160 | debug3("%s entering", __func__); |
1853d1ef | 1161 | |
1162 | if (buffer_len(m) != 16) | |
1588c277 | 1163 | fatal("%s: bad ssh1 session id", __func__); |
1853d1ef | 1164 | for (i = 0; i < 16; i++) |
1165 | session_id[i] = buffer_get_char(m); | |
1166 | ||
1167 | /* Turn on permissions for getpwnam */ | |
1168 | monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1); | |
1169 | ||
1170 | return (0); | |
1171 | } | |
1172 | ||
1173 | int | |
1174 | mm_answer_rsa_keyallowed(int socket, Buffer *m) | |
1175 | { | |
1176 | BIGNUM *client_n; | |
1177 | Key *key = NULL; | |
1178 | u_char *blob = NULL; | |
1179 | u_int blen = 0; | |
1180 | int allowed = 0; | |
1181 | ||
1588c277 | 1182 | debug3("%s entering", __func__); |
1853d1ef | 1183 | |
aa586f8e | 1184 | if (options.rsa_authentication && authctxt->valid) { |
1853d1ef | 1185 | if ((client_n = BN_new()) == NULL) |
1588c277 | 1186 | fatal("%s: BN_new", __func__); |
1853d1ef | 1187 | buffer_get_bignum2(m, client_n); |
1188 | allowed = auth_rsa_key_allowed(authctxt->pw, client_n, &key); | |
1189 | BN_clear_free(client_n); | |
1190 | } | |
1191 | buffer_clear(m); | |
1192 | buffer_put_int(m, allowed); | |
92e15201 | 1193 | buffer_put_int(m, forced_command != NULL); |
1853d1ef | 1194 | |
1195 | /* clear temporarily storage (used by generate challenge) */ | |
1196 | monitor_reset_key_state(); | |
1197 | ||
1198 | if (allowed && key != NULL) { | |
1199 | key->type = KEY_RSA; /* cheat for key_to_blob */ | |
1200 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1201 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1202 | buffer_put_string(m, blob, blen); |
1203 | ||
1204 | /* Save temporarily for comparison in verify */ | |
1205 | key_blob = blob; | |
1206 | key_bloblen = blen; | |
1207 | key_blobtype = MM_RSAUSERKEY; | |
1853d1ef | 1208 | } |
3e2f2431 | 1209 | if (key != NULL) |
1210 | key_free(key); | |
1853d1ef | 1211 | |
1212 | mm_append_debug(m); | |
1213 | ||
1214 | mm_request_send(socket, MONITOR_ANS_RSAKEYALLOWED, m); | |
1215 | ||
1216 | monitor_permit(mon_dispatch, MONITOR_REQ_RSACHALLENGE, allowed); | |
1217 | monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 0); | |
1218 | return (0); | |
1219 | } | |
1220 | ||
1221 | int | |
1222 | mm_answer_rsa_challenge(int socket, Buffer *m) | |
1223 | { | |
1224 | Key *key = NULL; | |
1225 | u_char *blob; | |
1226 | u_int blen; | |
1227 | ||
1588c277 | 1228 | debug3("%s entering", __func__); |
1853d1ef | 1229 | |
1230 | if (!authctxt->valid) | |
1588c277 | 1231 | fatal("%s: authctxt not valid", __func__); |
1853d1ef | 1232 | blob = buffer_get_string(m, &blen); |
1233 | if (!monitor_allowed_key(blob, blen)) | |
1588c277 | 1234 | fatal("%s: bad key, not previously allowed", __func__); |
1853d1ef | 1235 | if (key_blobtype != MM_RSAUSERKEY && key_blobtype != MM_RSAHOSTKEY) |
1588c277 | 1236 | fatal("%s: key type mismatch", __func__); |
1853d1ef | 1237 | if ((key = key_from_blob(blob, blen)) == NULL) |
1588c277 | 1238 | fatal("%s: received bad key", __func__); |
1853d1ef | 1239 | |
1240 | if (ssh1_challenge) | |
1241 | BN_clear_free(ssh1_challenge); | |
1242 | ssh1_challenge = auth_rsa_generate_challenge(key); | |
1243 | ||
1244 | buffer_clear(m); | |
1245 | buffer_put_bignum2(m, ssh1_challenge); | |
1246 | ||
1588c277 | 1247 | debug3("%s sending reply", __func__); |
1853d1ef | 1248 | mm_request_send(socket, MONITOR_ANS_RSACHALLENGE, m); |
1249 | ||
1250 | monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 1); | |
3e2f2431 | 1251 | |
1252 | xfree(blob); | |
1253 | key_free(key); | |
1853d1ef | 1254 | return (0); |
1255 | } | |
1256 | ||
1257 | int | |
1258 | mm_answer_rsa_response(int socket, Buffer *m) | |
1259 | { | |
1260 | Key *key = NULL; | |
1261 | u_char *blob, *response; | |
1262 | u_int blen, len; | |
1263 | int success; | |
1264 | ||
1588c277 | 1265 | debug3("%s entering", __func__); |
1853d1ef | 1266 | |
1267 | if (!authctxt->valid) | |
1588c277 | 1268 | fatal("%s: authctxt not valid", __func__); |
1853d1ef | 1269 | if (ssh1_challenge == NULL) |
1588c277 | 1270 | fatal("%s: no ssh1_challenge", __func__); |
1853d1ef | 1271 | |
1272 | blob = buffer_get_string(m, &blen); | |
1273 | if (!monitor_allowed_key(blob, blen)) | |
1588c277 | 1274 | fatal("%s: bad key, not previously allowed", __func__); |
1853d1ef | 1275 | if (key_blobtype != MM_RSAUSERKEY && key_blobtype != MM_RSAHOSTKEY) |
1588c277 | 1276 | fatal("%s: key type mismatch: %d", __func__, key_blobtype); |
1853d1ef | 1277 | if ((key = key_from_blob(blob, blen)) == NULL) |
1588c277 | 1278 | fatal("%s: received bad key", __func__); |
1853d1ef | 1279 | response = buffer_get_string(m, &len); |
1280 | if (len != 16) | |
1588c277 | 1281 | fatal("%s: received bad response to challenge", __func__); |
1853d1ef | 1282 | success = auth_rsa_verify_response(key, ssh1_challenge, response); |
1283 | ||
3e2f2431 | 1284 | xfree(blob); |
1853d1ef | 1285 | key_free(key); |
1286 | xfree(response); | |
1287 | ||
1288 | auth_method = key_blobtype == MM_RSAUSERKEY ? "rsa" : "rhosts-rsa"; | |
1289 | ||
1290 | /* reset state */ | |
1291 | BN_clear_free(ssh1_challenge); | |
1292 | ssh1_challenge = NULL; | |
1293 | monitor_reset_key_state(); | |
1294 | ||
1295 | buffer_clear(m); | |
1296 | buffer_put_int(m, success); | |
1297 | mm_request_send(socket, MONITOR_ANS_RSARESPONSE, m); | |
1298 | ||
1299 | return (success); | |
1300 | } | |
1301 | ||
2db9d8aa | 1302 | #ifdef KRB4 |
1303 | int | |
1304 | mm_answer_krb4(int socket, Buffer *m) | |
1305 | { | |
1306 | KTEXT_ST auth, reply; | |
1307 | char *client, *p; | |
1308 | int success; | |
1309 | u_int alen; | |
1310 | ||
1311 | reply.length = auth.length = 0; | |
1312 | ||
1313 | p = buffer_get_string(m, &alen); | |
1314 | if (alen >= MAX_KTXT_LEN) | |
1315 | fatal("%s: auth too large", __func__); | |
1316 | memcpy(auth.dat, p, alen); | |
1317 | auth.length = alen; | |
1318 | memset(p, 0, alen); | |
1319 | xfree(p); | |
1320 | ||
1321 | success = options.kerberos_authentication && | |
1322 | authctxt->valid && | |
1323 | auth_krb4(authctxt, &auth, &client, &reply); | |
1324 | ||
1325 | memset(auth.dat, 0, alen); | |
1326 | buffer_clear(m); | |
1327 | buffer_put_int(m, success); | |
1328 | ||
1329 | if (success) { | |
1330 | buffer_put_cstring(m, client); | |
1331 | buffer_put_string(m, reply.dat, reply.length); | |
1332 | if (client) | |
1333 | xfree(client); | |
1334 | if (reply.length) | |
1335 | memset(reply.dat, 0, reply.length); | |
1336 | } | |
1337 | ||
1338 | debug3("%s: sending result %d", __func__, success); | |
1339 | mm_request_send(socket, MONITOR_ANS_KRB4, m); | |
1340 | ||
1341 | auth_method = "kerberos"; | |
1342 | ||
1343 | /* Causes monitor loop to terminate if authenticated */ | |
1344 | return (success); | |
1345 | } | |
1346 | #endif | |
696f6bef | 1347 | |
1348 | #ifdef KRB5 | |
1349 | int | |
1350 | mm_answer_krb5(int socket, Buffer *m) | |
1351 | { | |
1352 | krb5_data tkt, reply; | |
1353 | char *client_user; | |
1354 | u_int len; | |
1355 | int success; | |
1356 | ||
1357 | /* use temporary var to avoid size issues on 64bit arch */ | |
1358 | tkt.data = buffer_get_string(m, &len); | |
1359 | tkt.length = len; | |
1360 | ||
4741e3a6 | 1361 | success = options.kerberos_authentication && |
1362 | authctxt->valid && | |
0082ad34 | 1363 | auth_krb5(authctxt, &tkt, &client_user, &reply); |
696f6bef | 1364 | |
1365 | if (tkt.length) | |
1366 | xfree(tkt.data); | |
1367 | ||
1368 | buffer_clear(m); | |
1369 | buffer_put_int(m, success); | |
1370 | ||
1371 | if (success) { | |
1372 | buffer_put_cstring(m, client_user); | |
1373 | buffer_put_string(m, reply.data, reply.length); | |
1374 | if (client_user) | |
1375 | xfree(client_user); | |
1376 | if (reply.length) | |
1377 | xfree(reply.data); | |
1378 | } | |
1379 | mm_request_send(socket, MONITOR_ANS_KRB5, m); | |
1380 | ||
1381 | return success; | |
1382 | } | |
1383 | #endif | |
1384 | ||
1853d1ef | 1385 | int |
1386 | mm_answer_term(int socket, Buffer *req) | |
1387 | { | |
b5a28cbc | 1388 | extern struct monitor *pmonitor; |
1853d1ef | 1389 | int res, status; |
1390 | ||
1588c277 | 1391 | debug3("%s: tearing down sessions", __func__); |
1853d1ef | 1392 | |
1393 | /* The child is terminating */ | |
1394 | session_destroy_all(&mm_session_close); | |
1395 | ||
b5a28cbc | 1396 | while (waitpid(pmonitor->m_pid, &status, 0) == -1) |
8c38e88b | 1397 | if (errno != EINTR) |
1398 | exit(1); | |
1853d1ef | 1399 | |
1400 | res = WIFEXITED(status) ? WEXITSTATUS(status) : 1; | |
1401 | ||
1402 | /* Terminate process */ | |
1403 | exit (res); | |
1404 | } | |
1405 | ||
1406 | void | |
b5a28cbc | 1407 | monitor_apply_keystate(struct monitor *pmonitor) |
1853d1ef | 1408 | { |
1409 | if (compat20) { | |
1410 | set_newkeys(MODE_IN); | |
1411 | set_newkeys(MODE_OUT); | |
1412 | } else { | |
1853d1ef | 1413 | packet_set_protocol_flags(child_state.ssh1protoflags); |
9459414c | 1414 | packet_set_encryption_key(child_state.ssh1key, |
1415 | child_state.ssh1keylen, child_state.ssh1cipher); | |
1416 | xfree(child_state.ssh1key); | |
1853d1ef | 1417 | } |
1418 | ||
9459414c | 1419 | /* for rc4 and other stateful ciphers */ |
1853d1ef | 1420 | packet_set_keycontext(MODE_OUT, child_state.keyout); |
1421 | xfree(child_state.keyout); | |
1422 | packet_set_keycontext(MODE_IN, child_state.keyin); | |
1423 | xfree(child_state.keyin); | |
1424 | ||
1425 | if (!compat20) { | |
1426 | packet_set_iv(MODE_OUT, child_state.ivout); | |
1427 | xfree(child_state.ivout); | |
1428 | packet_set_iv(MODE_IN, child_state.ivin); | |
1429 | xfree(child_state.ivin); | |
1430 | } | |
1431 | ||
1432 | memcpy(&incoming_stream, &child_state.incoming, | |
1433 | sizeof(incoming_stream)); | |
1434 | memcpy(&outgoing_stream, &child_state.outgoing, | |
1435 | sizeof(outgoing_stream)); | |
1436 | ||
1437 | /* Update with new address */ | |
0496cf34 | 1438 | if (options.compression) |
1439 | mm_init_compression(pmonitor->m_zlib); | |
1853d1ef | 1440 | |
1441 | /* Network I/O buffers */ | |
1442 | /* XXX inefficient for large buffers, need: buffer_init_from_string */ | |
1443 | buffer_clear(&input); | |
1444 | buffer_append(&input, child_state.input, child_state.ilen); | |
1445 | memset(child_state.input, 0, child_state.ilen); | |
1446 | xfree(child_state.input); | |
1447 | ||
1448 | buffer_clear(&output); | |
1449 | buffer_append(&output, child_state.output, child_state.olen); | |
1450 | memset(child_state.output, 0, child_state.olen); | |
1451 | xfree(child_state.output); | |
1452 | } | |
1453 | ||
1454 | static Kex * | |
1455 | mm_get_kex(Buffer *m) | |
1456 | { | |
1457 | Kex *kex; | |
1458 | void *blob; | |
1459 | u_int bloblen; | |
1460 | ||
1461 | kex = xmalloc(sizeof(*kex)); | |
1462 | memset(kex, 0, sizeof(*kex)); | |
1463 | kex->session_id = buffer_get_string(m, &kex->session_id_len); | |
521d606b | 1464 | if ((session_id2 == NULL) || |
1465 | (kex->session_id_len != session_id2_len) || | |
1466 | (memcmp(kex->session_id, session_id2, session_id2_len) != 0)) | |
1467 | fatal("mm_get_get: internal error: bad session id"); | |
1853d1ef | 1468 | kex->we_need = buffer_get_int(m); |
1469 | kex->server = 1; | |
1470 | kex->hostkey_type = buffer_get_int(m); | |
1471 | kex->kex_type = buffer_get_int(m); | |
1472 | blob = buffer_get_string(m, &bloblen); | |
1473 | buffer_init(&kex->my); | |
1474 | buffer_append(&kex->my, blob, bloblen); | |
1475 | xfree(blob); | |
1476 | blob = buffer_get_string(m, &bloblen); | |
1477 | buffer_init(&kex->peer); | |
1478 | buffer_append(&kex->peer, blob, bloblen); | |
1479 | xfree(blob); | |
1480 | kex->done = 1; | |
1481 | kex->flags = buffer_get_int(m); | |
1482 | kex->client_version_string = buffer_get_string(m, NULL); | |
1483 | kex->server_version_string = buffer_get_string(m, NULL); | |
1484 | kex->load_host_key=&get_hostkey_by_type; | |
1485 | kex->host_key_index=&get_hostkey_index; | |
1486 | ||
1487 | return (kex); | |
1488 | } | |
1489 | ||
1490 | /* This function requries careful sanity checking */ | |
1491 | ||
1492 | void | |
b5a28cbc | 1493 | mm_get_keystate(struct monitor *pmonitor) |
1853d1ef | 1494 | { |
1495 | Buffer m; | |
1496 | u_char *blob, *p; | |
1497 | u_int bloblen, plen; | |
1498 | ||
1588c277 | 1499 | debug3("%s: Waiting for new keys", __func__); |
1853d1ef | 1500 | |
1501 | buffer_init(&m); | |
b5a28cbc | 1502 | mm_request_receive_expect(pmonitor->m_sendfd, MONITOR_REQ_KEYEXPORT, &m); |
1853d1ef | 1503 | if (!compat20) { |
1504 | child_state.ssh1protoflags = buffer_get_int(&m); | |
1505 | child_state.ssh1cipher = buffer_get_int(&m); | |
9459414c | 1506 | child_state.ssh1key = buffer_get_string(&m, |
1507 | &child_state.ssh1keylen); | |
1853d1ef | 1508 | child_state.ivout = buffer_get_string(&m, |
1509 | &child_state.ivoutlen); | |
1510 | child_state.ivin = buffer_get_string(&m, &child_state.ivinlen); | |
1511 | goto skip; | |
1512 | } else { | |
1513 | /* Get the Kex for rekeying */ | |
b5a28cbc | 1514 | *pmonitor->m_pkex = mm_get_kex(&m); |
1853d1ef | 1515 | } |
1516 | ||
1517 | blob = buffer_get_string(&m, &bloblen); | |
1518 | current_keys[MODE_OUT] = mm_newkeys_from_blob(blob, bloblen); | |
1519 | xfree(blob); | |
1520 | ||
1588c277 | 1521 | debug3("%s: Waiting for second key", __func__); |
1853d1ef | 1522 | blob = buffer_get_string(&m, &bloblen); |
1523 | current_keys[MODE_IN] = mm_newkeys_from_blob(blob, bloblen); | |
1524 | xfree(blob); | |
1525 | ||
1526 | /* Now get sequence numbers for the packets */ | |
1527 | packet_set_seqnr(MODE_OUT, buffer_get_int(&m)); | |
1528 | packet_set_seqnr(MODE_IN, buffer_get_int(&m)); | |
1529 | ||
1530 | skip: | |
1531 | /* Get the key context */ | |
1532 | child_state.keyout = buffer_get_string(&m, &child_state.keyoutlen); | |
1533 | child_state.keyin = buffer_get_string(&m, &child_state.keyinlen); | |
1534 | ||
1588c277 | 1535 | debug3("%s: Getting compression state", __func__); |
1853d1ef | 1536 | /* Get compression state */ |
1537 | p = buffer_get_string(&m, &plen); | |
1538 | if (plen != sizeof(child_state.outgoing)) | |
1588c277 | 1539 | fatal("%s: bad request size", __func__); |
1853d1ef | 1540 | memcpy(&child_state.outgoing, p, sizeof(child_state.outgoing)); |
1541 | xfree(p); | |
1542 | ||
1543 | p = buffer_get_string(&m, &plen); | |
1544 | if (plen != sizeof(child_state.incoming)) | |
1588c277 | 1545 | fatal("%s: bad request size", __func__); |
1853d1ef | 1546 | memcpy(&child_state.incoming, p, sizeof(child_state.incoming)); |
1547 | xfree(p); | |
1548 | ||
1549 | /* Network I/O buffers */ | |
1588c277 | 1550 | debug3("%s: Getting Network I/O buffers", __func__); |
1853d1ef | 1551 | child_state.input = buffer_get_string(&m, &child_state.ilen); |
1552 | child_state.output = buffer_get_string(&m, &child_state.olen); | |
1553 | ||
1554 | buffer_free(&m); | |
1555 | } | |
1556 | ||
1557 | ||
1558 | /* Allocation functions for zlib */ | |
1559 | void * | |
1560 | mm_zalloc(struct mm_master *mm, u_int ncount, u_int size) | |
1561 | { | |
39e71188 | 1562 | size_t len = (size_t) size * ncount; |
1853d1ef | 1563 | void *address; |
1564 | ||
b85698ab | 1565 | if (len == 0 || ncount > SIZE_T_MAX / size) |
2f095a0e | 1566 | fatal("%s: mm_zalloc(%u, %u)", __func__, ncount, size); |
1567 | ||
1568 | address = mm_malloc(mm, len); | |
1853d1ef | 1569 | |
1570 | return (address); | |
1571 | } | |
1572 | ||
1573 | void | |
1574 | mm_zfree(struct mm_master *mm, void *address) | |
1575 | { | |
1576 | mm_free(mm, address); | |
1577 | } | |
1578 | ||
1579 | void | |
1580 | mm_init_compression(struct mm_master *mm) | |
1581 | { | |
1582 | outgoing_stream.zalloc = (alloc_func)mm_zalloc; | |
1583 | outgoing_stream.zfree = (free_func)mm_zfree; | |
1584 | outgoing_stream.opaque = mm; | |
1585 | ||
1586 | incoming_stream.zalloc = (alloc_func)mm_zalloc; | |
1587 | incoming_stream.zfree = (free_func)mm_zfree; | |
1588 | incoming_stream.opaque = mm; | |
1589 | } | |
1590 | ||
1591 | /* XXX */ | |
1592 | ||
1593 | #define FD_CLOSEONEXEC(x) do { \ | |
1594 | if (fcntl(x, F_SETFD, 1) == -1) \ | |
1595 | fatal("fcntl(%d, F_SETFD)", x); \ | |
1596 | } while (0) | |
1597 | ||
1598 | static void | |
1599 | monitor_socketpair(int *pair) | |
1600 | { | |
f1af2dbf | 1601 | #ifdef HAVE_SOCKETPAIR |
1853d1ef | 1602 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1) |
1588c277 | 1603 | fatal("%s: socketpair", __func__); |
f1af2dbf | 1604 | #else |
1605 | fatal("%s: UsePrivilegeSeparation=yes not supported", | |
1588c277 | 1606 | __func__); |
f1af2dbf | 1607 | #endif |
1853d1ef | 1608 | FD_CLOSEONEXEC(pair[0]); |
1609 | FD_CLOSEONEXEC(pair[1]); | |
1610 | } | |
1611 | ||
1612 | #define MM_MEMSIZE 65536 | |
1613 | ||
1614 | struct monitor * | |
1615 | monitor_init(void) | |
1616 | { | |
1617 | struct monitor *mon; | |
1618 | int pair[2]; | |
1619 | ||
1620 | mon = xmalloc(sizeof(*mon)); | |
1621 | ||
1622 | monitor_socketpair(pair); | |
1623 | ||
1624 | mon->m_recvfd = pair[0]; | |
1625 | mon->m_sendfd = pair[1]; | |
1626 | ||
1627 | /* Used to share zlib space across processes */ | |
0496cf34 | 1628 | if (options.compression) { |
1629 | mon->m_zback = mm_create(NULL, MM_MEMSIZE); | |
1630 | mon->m_zlib = mm_create(mon->m_zback, 20 * MM_MEMSIZE); | |
1853d1ef | 1631 | |
0496cf34 | 1632 | /* Compression needs to share state across borders */ |
1633 | mm_init_compression(mon->m_zlib); | |
1634 | } | |
1853d1ef | 1635 | |
1636 | return mon; | |
1637 | } | |
1638 | ||
1639 | void | |
1640 | monitor_reinit(struct monitor *mon) | |
1641 | { | |
1642 | int pair[2]; | |
1643 | ||
1644 | monitor_socketpair(pair); | |
1645 | ||
1646 | mon->m_recvfd = pair[0]; | |
1647 | mon->m_sendfd = pair[1]; | |
1648 | } |