Annotation of src/usr.bin/ssh/monitor.c, Revision 1.2
1.1 provos 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"
1.2 ! markus 28: RCSID("$OpenBSD: monitor.c,v 1.1 2002/03/18 17:28:37 provos Exp $");
1.1 provos 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;
86: int ssh1cipher;
87: int ssh1protoflags;
88: u_char *input;
89: u_int ilen;
90: u_char *output;
91: u_int olen;
92: } child_state;
93:
94: /* Functions on the montior that answer unprivileged requests */
95:
96: int mm_answer_moduli(int, Buffer *);
97: int mm_answer_sign(int, Buffer *);
98: int mm_answer_pwnamallow(int, Buffer *);
99: int mm_answer_authserv(int, Buffer *);
100: int mm_answer_authpassword(int, Buffer *);
101: int mm_answer_bsdauthquery(int, Buffer *);
102: int mm_answer_bsdauthrespond(int, Buffer *);
103: int mm_answer_skeyquery(int, Buffer *);
104: int mm_answer_skeyrespond(int, Buffer *);
105: int mm_answer_keyallowed(int, Buffer *);
106: int mm_answer_keyverify(int, Buffer *);
107: int mm_answer_pty(int, Buffer *);
108: int mm_answer_pty_cleanup(int, Buffer *);
109: int mm_answer_term(int, Buffer *);
110: int mm_answer_rsa_keyallowed(int, Buffer *);
111: int mm_answer_rsa_challenge(int, Buffer *);
112: int mm_answer_rsa_response(int, Buffer *);
113: int mm_answer_sesskey(int, Buffer *);
114: int mm_answer_sessid(int, Buffer *);
115:
116: static Authctxt *authctxt;
117: static BIGNUM *ssh1_challenge = NULL; /* used for ssh1 rsa auth */
118:
119: /* local state for key verify */
120: static u_char *key_blob = NULL;
121: static u_int key_bloblen = 0;
122: static int key_blobtype = MM_NOKEY;
123: static u_char *hostbased_cuser = NULL;
124: static u_char *hostbased_chost = NULL;
125: static char *auth_method = "unknown";
126:
127: struct mon_table {
128: enum monitor_reqtype type;
129: int flags;
130: int (*f)(int, Buffer *);
131: };
132:
133: #define MON_ISAUTH 0x0004 /* Required for Authentication */
134: #define MON_AUTHDECIDE 0x0008 /* Decides Authentication */
135: #define MON_ONCE 0x0010 /* Disable after calling */
136:
137: #define MON_AUTH (MON_ISAUTH|MON_AUTHDECIDE)
138:
139: #define MON_PERMIT 0x1000 /* Request is permitted */
140:
141: struct mon_table mon_dispatch_proto20[] = {
142: {MONITOR_REQ_MODULI, MON_ONCE, mm_answer_moduli},
143: {MONITOR_REQ_SIGN, MON_ONCE, mm_answer_sign},
144: {MONITOR_REQ_PWNAM, MON_ONCE, mm_answer_pwnamallow},
145: {MONITOR_REQ_AUTHSERV, MON_ONCE, mm_answer_authserv},
146: {MONITOR_REQ_AUTHPASSWORD, MON_AUTH, mm_answer_authpassword},
147: #ifdef BSD_AUTH
148: {MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery},
149: {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH,mm_answer_bsdauthrespond},
150: #endif
151: #ifdef SKEY
152: {MONITOR_REQ_SKEYQUERY, MON_ISAUTH, mm_answer_skeyquery},
153: {MONITOR_REQ_SKEYRESPOND, MON_AUTH, mm_answer_skeyrespond},
154: #endif
155: {MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed},
156: {MONITOR_REQ_KEYVERIFY, MON_AUTH, mm_answer_keyverify},
157: {0, 0, NULL}
158: };
159:
160: struct mon_table mon_dispatch_postauth20[] = {
161: {MONITOR_REQ_MODULI, 0, mm_answer_moduli},
162: {MONITOR_REQ_SIGN, 0, mm_answer_sign},
163: {MONITOR_REQ_PTY, 0, mm_answer_pty},
164: {MONITOR_REQ_PTYCLEANUP, 0, mm_answer_pty_cleanup},
165: {MONITOR_REQ_TERM, 0, mm_answer_term},
166: {0, 0, NULL}
167: };
168:
169: struct mon_table mon_dispatch_proto15[] = {
170: {MONITOR_REQ_PWNAM, MON_ONCE, mm_answer_pwnamallow},
171: {MONITOR_REQ_SESSKEY, MON_ONCE, mm_answer_sesskey},
172: {MONITOR_REQ_SESSID, MON_ONCE, mm_answer_sessid},
173: {MONITOR_REQ_AUTHPASSWORD, MON_AUTH, mm_answer_authpassword},
174: {MONITOR_REQ_RSAKEYALLOWED, MON_ISAUTH, mm_answer_rsa_keyallowed},
175: {MONITOR_REQ_KEYALLOWED, MON_ISAUTH, mm_answer_keyallowed},
176: {MONITOR_REQ_RSACHALLENGE, MON_ONCE, mm_answer_rsa_challenge},
177: {MONITOR_REQ_RSARESPONSE, MON_ONCE|MON_AUTHDECIDE, mm_answer_rsa_response},
178: #ifdef BSD_AUTH
179: {MONITOR_REQ_BSDAUTHQUERY, MON_ISAUTH, mm_answer_bsdauthquery},
180: {MONITOR_REQ_BSDAUTHRESPOND, MON_AUTH,mm_answer_bsdauthrespond},
181: #endif
182: #ifdef SKEY
183: {MONITOR_REQ_SKEYQUERY, MON_ISAUTH, mm_answer_skeyquery},
184: {MONITOR_REQ_SKEYRESPOND, MON_AUTH, mm_answer_skeyrespond},
185: #endif
186: {0, 0, NULL}
187: };
188:
189: struct mon_table mon_dispatch_postauth15[] = {
190: {MONITOR_REQ_PTY, MON_ONCE, mm_answer_pty},
191: {MONITOR_REQ_PTYCLEANUP, MON_ONCE, mm_answer_pty_cleanup},
192: {MONITOR_REQ_TERM, 0, mm_answer_term},
193: {0, 0, NULL}
194: };
195:
196: struct mon_table *mon_dispatch;
197:
198: /* Specifies if a certain message is allowed at the moment */
199:
200: static void
201: monitor_permit(struct mon_table *ent, enum monitor_reqtype type, int permit)
202: {
203: while (ent->f != NULL) {
204: if (ent->type == type) {
205: ent->flags &= ~MON_PERMIT;
206: ent->flags |= permit ? MON_PERMIT : 0;
207: return;
208: }
209: ent++;
210: }
211: }
212:
213: static void
214: monitor_permit_authentications(int permit)
215: {
216: struct mon_table *ent = mon_dispatch;
217:
218: while (ent->f != NULL) {
219: if (ent->flags & MON_AUTH) {
220: ent->flags &= ~MON_PERMIT;
221: ent->flags |= permit ? MON_PERMIT : 0;
222: }
223: ent++;
224: }
225: }
226:
227: Authctxt *
228: monitor_child_preauth(struct monitor *monitor)
229: {
230: struct mon_table *ent;
231: int authenticated = 0;
232:
233: debug3("preauth child monitor started");
234:
235: if (compat20) {
236: mon_dispatch = mon_dispatch_proto20;
237:
238: /* Permit requests for moduli and signatures */
239: monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1);
240: monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1);
241: } else {
242: mon_dispatch = mon_dispatch_proto15;
243:
244: monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 1);
245: }
246:
247: authctxt = authctxt_new();
248:
249: /* The first few requests do not require asynchronous access */
250: while (!authenticated) {
251: authenticated = monitor_read(monitor, mon_dispatch, &ent);
252: if (authenticated) {
253: if (!(ent->flags & MON_AUTHDECIDE))
254: fatal("%s: unexpected authentication from %d",
255: __FUNCTION__, ent->type);
256: if (authctxt->pw->pw_uid == 0 &&
257: !auth_root_allowed(auth_method))
258: authenticated = 0;
259: }
260:
261: if (ent->flags & MON_AUTHDECIDE) {
262: auth_log(authctxt, authenticated, auth_method,
263: compat20 ? " ssh2" : "");
264: if (!authenticated)
265: authctxt->failures++;
266: }
267: }
268:
269: if (!authctxt->valid)
270: fatal("%s: authenticated invalid user", __FUNCTION__);
271:
272: debug("%s: %s has been authenticated by privileged process",
273: __FUNCTION__, authctxt->user);
274:
275: mm_get_keystate(monitor);
276:
277: return (authctxt);
278: }
279:
280: void
281: monitor_child_postauth(struct monitor *monitor)
282: {
283: if (compat20) {
284: mon_dispatch = mon_dispatch_postauth20;
285:
286: /* Permit requests for moduli and signatures */
287: monitor_permit(mon_dispatch, MONITOR_REQ_MODULI, 1);
288: monitor_permit(mon_dispatch, MONITOR_REQ_SIGN, 1);
289: monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1);
290:
291: } else {
292: mon_dispatch = mon_dispatch_postauth15;
293: monitor_permit(mon_dispatch, MONITOR_REQ_TERM, 1);
294: }
295: if (!no_pty_flag) {
296: monitor_permit(mon_dispatch, MONITOR_REQ_PTY, 1);
297: monitor_permit(mon_dispatch, MONITOR_REQ_PTYCLEANUP, 1);
298: }
299:
300: for (;;)
301: monitor_read(monitor, mon_dispatch, NULL);
302: }
303:
304: void
305: monitor_sync(struct monitor *monitor)
306: {
307: /* The member allocation is not visible, so sync it */
308: mm_share_sync(&monitor->m_zlib, &monitor->m_zback);
309: }
310:
311: int
312: monitor_read(struct monitor *monitor, struct mon_table *ent,
313: struct mon_table **pent)
314: {
315: Buffer m;
316: int ret;
317: u_char type;
318:
319: buffer_init(&m);
320:
321: mm_request_receive(monitor->m_sendfd, &m);
322: type = buffer_get_char(&m);
323:
324: debug3("%s: checking request %d", __FUNCTION__, type);
325:
326: while (ent->f != NULL) {
327: if (ent->type == type)
328: break;
329: ent++;
330: }
331:
332: if (ent->f != NULL) {
333: if (!(ent->flags & MON_PERMIT))
334: fatal("%s: unpermitted request %d", __FUNCTION__,
335: type);
336: ret = (*ent->f)(monitor->m_sendfd, &m);
337: buffer_free(&m);
338:
339: /* The child may use this request only once, disable it */
340: if (ent->flags & MON_ONCE) {
341: debug2("%s: %d used once, disabling now", __FUNCTION__,
342: type);
343: ent->flags &= ~MON_PERMIT;
344: }
345:
346: if (pent != NULL)
347: *pent = ent;
348:
349: return ret;
350: }
351:
352: fatal("%s: unsupported request: %d\n", __FUNCTION__, type);
353:
354: /* NOTREACHED */
355: return (-1);
356: }
357:
358: /* allowed key state */
359: static int
360: monitor_allowed_key(u_char *blob, u_int bloblen)
361: {
362: /* make sure key is allowed */
363: if (key_blob == NULL || key_bloblen != bloblen ||
364: memcmp(key_blob, blob, key_bloblen))
365: return (0);
366: return (1);
367: }
368:
369: static void
370: monitor_reset_key_state(void)
371: {
372: /* reset state */
373: if (key_blob != NULL)
374: xfree(key_blob);
375: if (hostbased_cuser != NULL)
376: xfree(hostbased_cuser);
377: if (hostbased_chost != NULL)
378: xfree(hostbased_chost);
379: key_blob = NULL;
380: key_bloblen = 0;
381: key_blobtype = MM_NOKEY;
382: hostbased_cuser = NULL;
383: hostbased_chost = NULL;
384: }
385:
386: int
387: mm_answer_moduli(int socket, Buffer *m)
388: {
389: DH *dh;
390: int min, want, max;
391:
392: min = buffer_get_int(m);
393: want = buffer_get_int(m);
394: max = buffer_get_int(m);
395:
396: debug3("%s: got parameters: %d %d %d",
397: __FUNCTION__, min, want, max);
398: /* We need to check here, too, in case the child got corrupted */
399: if (max < min || want < min || max < want)
400: fatal("%s: bad parameters: %d %d %d",
401: __FUNCTION__, min, want, max);
402:
403: buffer_clear(m);
404:
405: dh = choose_dh(min, want, max);
406: if (dh == NULL) {
407: buffer_put_char(m, 0);
408: return (0);
409: } else {
410: /* Send first bignum */
411: buffer_put_char(m, 1);
412: buffer_put_bignum2(m, dh->p);
413: buffer_put_bignum2(m, dh->g);
414:
415: DH_free(dh);
416: }
417: mm_request_send(socket, MONITOR_ANS_MODULI, m);
418: return (0);
419: }
420:
421: int
422: mm_answer_sign(int socket, Buffer *m)
423: {
424: Key *key;
425: u_char *p;
426: u_char *signature;
427: u_int siglen, datlen;
428: int keyid;
429:
430: debug3("%s", __FUNCTION__);
431:
432: keyid = buffer_get_int(m);
433: p = buffer_get_string(m, &datlen);
434:
435: if (datlen != 20)
436: fatal("%s: data length incorrect: %d", __FUNCTION__, datlen);
437:
438: if ((key = get_hostkey_by_index(keyid)) == NULL)
439: fatal("%s: no hostkey from index %d", __FUNCTION__, keyid);
440: if (key_sign(key, &signature, &siglen, p, datlen) < 0)
441: fatal("%s: key_sign failed", __FUNCTION__);
442:
443: debug3("%s: signature %p(%d)", __FUNCTION__, signature, siglen);
444:
445: buffer_clear(m);
446: buffer_put_string(m, signature, siglen);
447:
448: xfree(p);
449: xfree(signature);
450:
451: mm_request_send(socket, MONITOR_ANS_SIGN, m);
452:
453: /* Turn on permissions for getpwnam */
454: monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1);
455:
456: return (0);
457: }
458:
459: /* Retrieves the password entry and also checks if the user is permitted */
460:
461: int
462: mm_answer_pwnamallow(int socket, Buffer *m)
463: {
464: char *login;
465: struct passwd *pwent;
466: int allowed = 0;
467:
468: debug3("%s", __FUNCTION__);
469:
470: if (authctxt->attempt++ != 0)
471: fatal("%s: multiple attempts for getpwnam", __FUNCTION__);
472:
473: login = buffer_get_string(m, NULL);
474:
475: pwent = getpwnamallow(login);
476:
477: authctxt->user = xstrdup(login);
478: setproctitle("%s [priv]", pwent ? login : "unknown");
479: xfree(login);
480:
481: buffer_clear(m);
482:
483: if (pwent == NULL) {
484: buffer_put_char(m, 0);
485: goto out;
486: }
487:
488: allowed = 1;
489: authctxt->pw = pwcopy(pwent);
490: authctxt->valid = 1;
491:
492: buffer_put_char(m, 1);
493: buffer_put_string(m, pwent, sizeof(struct passwd));
494: buffer_put_cstring(m, pwent->pw_name);
495: buffer_put_cstring(m, "*");
496: buffer_put_cstring(m, pwent->pw_gecos);
497: buffer_put_cstring(m, pwent->pw_class);
498: buffer_put_cstring(m, pwent->pw_dir);
499: buffer_put_cstring(m, pwent->pw_shell);
500:
501: out:
502: debug3("%s: sending MONITOR_ANS_PWNAM: %d", __FUNCTION__, allowed);
503: mm_request_send(socket, MONITOR_ANS_PWNAM, m);
504:
505: /* For SSHv1 allow authentication now */
506: if (!compat20)
507: monitor_permit_authentications(1);
508: else
509: /* Allow service/style information on the auth context */
510: monitor_permit(mon_dispatch, MONITOR_REQ_AUTHSERV, 1);
511:
512:
513: return (0);
514: }
515:
516: int
517: mm_answer_authserv(int socket, Buffer *m)
518: {
519: monitor_permit_authentications(1);
520:
521: authctxt->service = buffer_get_string(m, NULL);
522: authctxt->style = buffer_get_string(m, NULL);
523: if (strlen(authctxt->style) == 0) {
524: xfree(authctxt->style);
525: authctxt->style = NULL;
526: }
527:
528: debug3("%s: service=%s, style=%s",
529: __FUNCTION__, authctxt->service, authctxt->style);
530:
531: return (0);
532: }
533:
534: int
535: mm_answer_authpassword(int socket, Buffer *m)
536: {
537: static int call_count;
538: char *passwd;
539: int authenticated, plen;
540:
541: passwd = buffer_get_string(m, &plen);
542: /* Only authenticate if the context is valid */
543: authenticated = authctxt->valid && auth_password(authctxt, passwd);
544: memset(passwd, 0, strlen(passwd));
545: xfree(passwd);
546:
547: buffer_clear(m);
548: buffer_put_int(m, authenticated);
549:
550: debug3("%s: sending result %d", __FUNCTION__, authenticated);
551: mm_request_send(socket, MONITOR_ANS_AUTHPASSWORD, m);
552:
553: call_count++;
554: if (plen == 0 && call_count == 1)
555: auth_method = "none";
556: else
557: auth_method = "password";
558:
559: /* Causes monitor loop to terminate if authenticated */
560: return (authenticated);
561: }
562:
563: #ifdef BSD_AUTH
564: int
565: mm_answer_bsdauthquery(int socket, Buffer *m)
566: {
567: char *name, *infotxt;
568: u_int numprompts;
569: u_int *echo_on;
570: char **prompts;
571: int res;
572:
573: res = bsdauth_query(authctxt, &name, &infotxt, &numprompts,
574: &prompts, &echo_on);
575:
576: buffer_clear(m);
577: buffer_put_int(m, res);
578: if (res != -1)
579: buffer_put_cstring(m, prompts[0]);
580:
581: debug3("%s: sending challenge res: %d", __FUNCTION__, res);
582: mm_request_send(socket, MONITOR_ANS_BSDAUTHQUERY, m);
583:
584: if (res != -1) {
585: xfree(name);
586: xfree(infotxt);
587: xfree(prompts);
588: xfree(echo_on);
589: }
590:
591: return (0);
592: }
593:
594: int
595: mm_answer_bsdauthrespond(int socket, Buffer *m)
596: {
597: char *response;
598: int authok;
599:
600: if (authctxt->as == 0)
601: fatal("%s: no bsd auth session", __FUNCTION__);
602:
603: response = buffer_get_string(m, NULL);
604: authok = auth_userresponse(authctxt->as, response, 0);
605: authctxt->as = NULL;
606: debug3("%s: <%s> = <%d>", __FUNCTION__, response, authok);
607: xfree(response);
608:
609: buffer_clear(m);
610: buffer_put_int(m, authok);
611:
612: debug3("%s: sending authenticated: %d", __FUNCTION__, authok);
613: mm_request_send(socket, MONITOR_ANS_BSDAUTHRESPOND, m);
614:
615: auth_method = "bsdauth";
616:
617: return (authok != 0);
618: }
619: #endif
620:
621: #ifdef SKEY
622: int
623: mm_answer_skeyquery(int socket, Buffer *m)
624: {
625: struct skey skey;
626: char challenge[1024];
627: int res;
628:
629: res = skeychallenge(&skey, authctxt->user, challenge);
630:
631: buffer_clear(m);
632: buffer_put_int(m, res);
633: if (res != -1)
634: buffer_put_cstring(m, challenge);
635:
636: debug3("%s: sending challenge res: %d", __FUNCTION__, res);
637: mm_request_send(socket, MONITOR_ANS_SKEYQUERY, m);
638:
639: return (0);
640: }
641:
642: int
643: mm_answer_skeyrespond(int socket, Buffer *m)
644: {
645: char *response;
646: int authok;
647:
648: response = buffer_get_string(m, NULL);
649:
650: authok = (authctxt->valid &&
651: skey_haskey(authctxt->pw->pw_name) == 0 &&
652: skey_passcheck(authctxt->pw->pw_name, response) != -1);
653:
654: xfree(response);
655:
656: buffer_clear(m);
657: buffer_put_int(m, authok);
658:
659: debug3("%s: sending authenticated: %d", __FUNCTION__, authok);
660: mm_request_send(socket, MONITOR_ANS_SKEYRESPOND, m);
661:
662: auth_method = "skey";
663:
664: return (authok != 0);
665: }
666: #endif
667:
1.2 ! markus 668: static void
1.1 provos 669: mm_append_debug(Buffer *m)
670: {
671: if (auth_debug_init && buffer_len(&auth_debug)) {
672: debug3("%s: Appending debug messages for child", __FUNCTION__);
673: buffer_append(m, buffer_ptr(&auth_debug),
674: buffer_len(&auth_debug));
675: buffer_clear(&auth_debug);
676: }
677: }
678:
679: int
680: mm_answer_keyallowed(int socket, Buffer *m)
681: {
682: Key *key;
683: u_char *cuser, *chost, *blob;
684: u_int bloblen;
685: enum mm_keytype type = 0;
686: int allowed = 0;
687:
688: debug3("%s entering", __FUNCTION__);
689:
690: type = buffer_get_int(m);
691: cuser = buffer_get_string(m, NULL);
692: chost = buffer_get_string(m, NULL);
693: blob = buffer_get_string(m, &bloblen);
694:
695: key = key_from_blob(blob, bloblen);
696:
697: if ((compat20 && type == MM_RSAHOSTKEY) ||
698: (!compat20 && type != MM_RSAHOSTKEY))
699: fatal("%s: key type and protocol mismatch", __FUNCTION__);
700:
701: debug3("%s: key_from_blob: %p", __FUNCTION__, key);
702:
703: if (key != NULL && authctxt->pw != NULL) {
704: switch(type) {
705: case MM_USERKEY:
706: allowed = user_key_allowed(authctxt->pw, key);
707: break;
708: case MM_HOSTKEY:
709: allowed = hostbased_key_allowed(authctxt->pw,
710: cuser, chost, key);
711: break;
712: case MM_RSAHOSTKEY:
713: key->type = KEY_RSA1; /* XXX */
714: allowed = auth_rhosts_rsa_key_allowed(authctxt->pw,
715: cuser, chost, key);
716: break;
717: default:
718: fatal("%s: unknown key type %d", __FUNCTION__, type);
719: break;
720: }
721: key_free(key);
722: }
723:
724: /* clear temporarily storage (used by verify) */
725: monitor_reset_key_state();
726:
727: if (allowed) {
728: /* Save temporarily for comparison in verify */
729: key_blob = blob;
730: key_bloblen = bloblen;
731: key_blobtype = type;
732: hostbased_cuser = cuser;
733: hostbased_chost = chost;
734: }
735:
736: debug3("%s: key %p is %s",
737: __FUNCTION__, key, allowed ? "allowed" : "disallowed");
738:
739: buffer_clear(m);
740: buffer_put_int(m, allowed);
741:
742: mm_append_debug(m);
743:
744: mm_request_send(socket, MONITOR_ANS_KEYALLOWED, m);
745:
746: if (type == MM_RSAHOSTKEY)
747: monitor_permit(mon_dispatch, MONITOR_REQ_RSACHALLENGE, allowed);
748:
749: return (0);
750: }
751:
752: static int
753: monitor_valid_userblob(u_char *data, u_int datalen)
754: {
755: Buffer b;
756: u_char *p;
757: u_int len;
758: int fail = 0;
759: int session_id2_len = 20 /*XXX should get from [net] */;
760:
761: buffer_init(&b);
762: buffer_append(&b, data, datalen);
763:
764: if (datafellows & SSH_OLD_SESSIONID) {
765: buffer_consume(&b, session_id2_len);
766: } else {
767: xfree(buffer_get_string(&b, &len));
768: if (len != session_id2_len)
769: fail++;
770: }
771: if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST)
772: fail++;
773: p = buffer_get_string(&b, NULL);
774: if (strcmp(authctxt->user, p) != 0) {
775: log("wrong user name passed to monitor: expected %s != %.100s",
776: authctxt->user, p);
777: fail++;
778: }
779: xfree(p);
780: buffer_skip_string(&b);
781: if (datafellows & SSH_BUG_PKAUTH) {
782: if (!buffer_get_char(&b))
783: fail++;
784: } else {
785: p = buffer_get_string(&b, NULL);
786: if (strcmp("publickey", p) != 0)
787: fail++;
788: xfree(p);
789: if (!buffer_get_char(&b))
790: fail++;
791: buffer_skip_string(&b);
792: }
793: buffer_skip_string(&b);
794: if (buffer_len(&b) != 0)
795: fail++;
796: buffer_free(&b);
797: return (fail == 0);
798: }
799:
800: static int
801: monitor_valid_hostbasedblob(u_char *data, u_int datalen, u_char *cuser,
802: u_char *chost)
803: {
804: Buffer b;
805: u_char *p;
806: u_int len;
807: int fail = 0;
808: int session_id2_len = 20 /*XXX should get from [net] */;
809:
810: buffer_init(&b);
811: buffer_append(&b, data, datalen);
812:
813: xfree(buffer_get_string(&b, &len));
814: if (len != session_id2_len)
815: fail++;
816: if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST)
817: fail++;
818: p = buffer_get_string(&b, NULL);
819: if (strcmp(authctxt->user, p) != 0) {
820: log("wrong user name passed to monitor: expected %s != %.100s",
821: authctxt->user, p);
822: fail++;
823: }
824: xfree(p);
825: buffer_skip_string(&b); /* service */
826: p = buffer_get_string(&b, NULL);
827: if (strcmp(p, "hostbased") != 0)
828: fail++;
829: xfree(p);
830: buffer_skip_string(&b); /* pkalg */
831: buffer_skip_string(&b); /* pkblob */
832:
833: /* verify client host, strip trailing dot if necessary */
834: p = buffer_get_string(&b, NULL);
835: if (((len = strlen(p)) > 0) && p[len - 1] == '.')
836: p[len - 1] = '\0';
837: if (strcmp(p, chost) != 0)
838: fail++;
839: xfree(p);
840:
841: /* verify client user */
842: p = buffer_get_string(&b, NULL);
843: if (strcmp(p, cuser) != 0)
844: fail++;
845: xfree(p);
846:
847: if (buffer_len(&b) != 0)
848: fail++;
849: buffer_free(&b);
850: return (fail == 0);
851: }
852:
853: int
854: mm_answer_keyverify(int socket, Buffer *m)
855: {
856: Key *key;
857: u_char *signature, *data, *blob;
858: u_int signaturelen, datalen, bloblen;
859: int verified = 0;
860: int valid_data = 0;
861:
862: blob = buffer_get_string(m, &bloblen);
863: signature = buffer_get_string(m, &signaturelen);
864: data = buffer_get_string(m, &datalen);
865:
866: if (hostbased_cuser == NULL || hostbased_chost == NULL ||
867: monitor_allowed_key(blob, bloblen) == NULL)
868: fatal("%s: bad key, not previously allowed", __FUNCTION__);
869:
870: key = key_from_blob(blob, bloblen);
871: if (key == NULL)
872: fatal("%s: bad public key blob", __FUNCTION__);
873:
874: switch (key_blobtype) {
875: case MM_USERKEY:
876: valid_data = monitor_valid_userblob(data, datalen);
877: break;
878: case MM_HOSTKEY:
879: valid_data = monitor_valid_hostbasedblob(data, datalen,
880: hostbased_cuser, hostbased_chost);
881: break;
882: default:
883: valid_data = 0;
884: break;
885: }
886: if (!valid_data)
887: fatal("%s: bad signature data blob", __FUNCTION__);
888:
889: verified = key_verify(key, signature, signaturelen, data, datalen);
890: debug3("%s: key %p signature %s",
891: __FUNCTION__, key, verified ? "verified" : "unverified");
892:
893: key_free(key);
894: xfree(blob);
895: xfree(signature);
896: xfree(data);
897:
898: monitor_reset_key_state();
899:
900: buffer_clear(m);
901: buffer_put_int(m, verified);
902: mm_request_send(socket, MONITOR_ANS_KEYVERIFY, m);
903:
904: auth_method = "publickey";
905:
906: return (verified);
907: }
908:
1.2 ! markus 909: static void
1.1 provos 910: mm_record_login(Session *s, struct passwd *pw)
911: {
912: socklen_t fromlen;
913: struct sockaddr_storage from;
914:
915: /*
916: * Get IP address of client. If the connection is not a socket, let
917: * the address be 0.0.0.0.
918: */
919: memset(&from, 0, sizeof(from));
920: if (packet_connection_is_on_socket()) {
921: fromlen = sizeof(from);
922: if (getpeername(packet_get_connection_in(),
923: (struct sockaddr *) & from, &fromlen) < 0) {
924: debug("getpeername: %.100s", strerror(errno));
925: fatal_cleanup();
926: }
927: }
928: /* Record that there was a login on that tty from the remote host. */
929: record_login(s->pid, s->tty, pw->pw_name, pw->pw_uid,
930: get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping),
931: (struct sockaddr *)&from);
932: }
933:
934: static void
935: mm_session_close(Session *s)
936: {
937: debug3("%s: session %d pid %d", __FUNCTION__, s->self, s->pid);
938: if (s->ttyfd != -1) {
939: debug3("%s: tty %s ptyfd %d", __FUNCTION__, s->tty, s->ptyfd);
940: fatal_remove_cleanup(session_pty_cleanup2, (void *)s);
941: session_pty_cleanup2(s);
942: }
943: s->used = 0;
944: }
945:
946: int
947: mm_answer_pty(int socket, Buffer *m)
948: {
949: extern struct monitor *monitor;
950: Session *s;
951: int res, fd0;
952:
953: debug3("%s entering", __FUNCTION__);
954:
955: buffer_clear(m);
956: s = session_new();
957: if (s == NULL)
958: goto error;
959: s->authctxt = authctxt;
960: s->pw = authctxt->pw;
961: s->pid = monitor->m_pid;
962: res = pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty));
963: if (res == 0)
964: goto error;
965: fatal_add_cleanup(session_pty_cleanup2, (void *)s);
966: pty_setowner(authctxt->pw, s->tty);
967:
968: buffer_put_int(m, 1);
969: buffer_put_cstring(m, s->tty);
970: mm_request_send(socket, MONITOR_ANS_PTY, m);
971:
972: mm_send_fd(socket, s->ptyfd);
973: mm_send_fd(socket, s->ttyfd);
974:
975: /* We need to trick ttyslot */
976: if (dup2(s->ttyfd, 0) == -1)
977: fatal("%s: dup2", __FUNCTION__);
978:
979: mm_record_login(s, authctxt->pw);
980:
981: /* Now we can close the file descriptor again */
982: close(0);
983:
984: /* make sure nothing uses fd 0 */
985: if ((fd0 = open(_PATH_DEVNULL, O_RDONLY)) < 0)
986: fatal("%s: open(/dev/null): %s", __FUNCTION__, strerror(errno));
987: if (fd0 != 0)
988: error("%s: fd0 %d != 0", __FUNCTION__, fd0);
989:
990: /* slave is not needed */
991: close(s->ttyfd);
992: s->ttyfd = s->ptyfd;
993: /* no need to dup() because nobody closes ptyfd */
994: s->ptymaster = s->ptyfd;
995:
996: debug3("%s: tty %s ptyfd %d", __FUNCTION__, s->tty, s->ttyfd);
997:
998: return (0);
999:
1000: error:
1001: if (s != NULL)
1002: mm_session_close(s);
1003: buffer_put_int(m, 0);
1004: mm_request_send(socket, MONITOR_ANS_PTY, m);
1005: return (0);
1006: }
1007:
1008: int
1009: mm_answer_pty_cleanup(int socket, Buffer *m)
1010: {
1011: Session *s;
1012: char *tty;
1013:
1014: debug3("%s entering", __FUNCTION__);
1015:
1016: tty = buffer_get_string(m, NULL);
1017: if ((s = session_by_tty(tty)) != NULL)
1018: mm_session_close(s);
1019: buffer_clear(m);
1020: xfree(tty);
1021: return (0);
1022: }
1023:
1024: int
1025: mm_answer_sesskey(int socket, Buffer *m)
1026: {
1027: BIGNUM *p;
1028: int rsafail;
1029:
1030: /* Turn off permissions */
1031: monitor_permit(mon_dispatch, MONITOR_REQ_SESSKEY, 1);
1032:
1033: if ((p = BN_new()) == NULL)
1034: fatal("%s: BN_new", __FUNCTION__);
1035:
1036: buffer_get_bignum2(m, p);
1037:
1038: rsafail = ssh1_session_key(p);
1039:
1040: buffer_clear(m);
1041: buffer_put_int(m, rsafail);
1042: buffer_put_bignum2(m, p);
1043:
1044: BN_clear_free(p);
1045:
1046: mm_request_send(socket, MONITOR_ANS_SESSKEY, m);
1047:
1048: /* Turn on permissions for sessid passing */
1049: monitor_permit(mon_dispatch, MONITOR_REQ_SESSID, 1);
1050:
1051: return (0);
1052: }
1053:
1054: int
1055: mm_answer_sessid(int socket, Buffer *m)
1056: {
1057: int i;
1058:
1059: debug3("%s entering", __FUNCTION__);
1060:
1061: if (buffer_len(m) != 16)
1062: fatal("%s: bad ssh1 session id", __FUNCTION__);
1063: for (i = 0; i < 16; i++)
1064: session_id[i] = buffer_get_char(m);
1065:
1066: /* Turn on permissions for getpwnam */
1067: monitor_permit(mon_dispatch, MONITOR_REQ_PWNAM, 1);
1068:
1069: return (0);
1070: }
1071:
1072: int
1073: mm_answer_rsa_keyallowed(int socket, Buffer *m)
1074: {
1075: BIGNUM *client_n;
1076: Key *key = NULL;
1077: u_char *blob = NULL;
1078: u_int blen = 0;
1079: int allowed = 0;
1080:
1081: debug3("%s entering", __FUNCTION__);
1082:
1083: if (authctxt->valid) {
1084: if ((client_n = BN_new()) == NULL)
1085: fatal("%s: BN_new", __FUNCTION__);
1086: buffer_get_bignum2(m, client_n);
1087: allowed = auth_rsa_key_allowed(authctxt->pw, client_n, &key);
1088: BN_clear_free(client_n);
1089: }
1090: buffer_clear(m);
1091: buffer_put_int(m, allowed);
1092:
1093: /* clear temporarily storage (used by generate challenge) */
1094: monitor_reset_key_state();
1095:
1096: if (allowed && key != NULL) {
1097: key->type = KEY_RSA; /* cheat for key_to_blob */
1098: if (key_to_blob(key, &blob, &blen) == 0)
1099: fatal("%s: key_to_blob failed", __FUNCTION__);
1100: buffer_put_string(m, blob, blen);
1101:
1102: /* Save temporarily for comparison in verify */
1103: key_blob = blob;
1104: key_bloblen = blen;
1105: key_blobtype = MM_RSAUSERKEY;
1106: key_free(key);
1107: }
1108:
1109: mm_append_debug(m);
1110:
1111: mm_request_send(socket, MONITOR_ANS_RSAKEYALLOWED, m);
1112:
1113: monitor_permit(mon_dispatch, MONITOR_REQ_RSACHALLENGE, allowed);
1114: monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 0);
1115: return (0);
1116: }
1117:
1118: int
1119: mm_answer_rsa_challenge(int socket, Buffer *m)
1120: {
1121: Key *key = NULL;
1122: u_char *blob;
1123: u_int blen;
1124:
1125: debug3("%s entering", __FUNCTION__);
1126:
1127: if (!authctxt->valid)
1128: fatal("%s: authctxt not valid", __FUNCTION__);
1129: blob = buffer_get_string(m, &blen);
1130: if (!monitor_allowed_key(blob, blen))
1131: fatal("%s: bad key, not previously allowed", __FUNCTION__);
1132: if (key_blobtype != MM_RSAUSERKEY && key_blobtype != MM_RSAHOSTKEY)
1133: fatal("%s: key type mismatch", __FUNCTION__);
1134: if ((key = key_from_blob(blob, blen)) == NULL)
1135: fatal("%s: received bad key", __FUNCTION__);
1136:
1137: if (ssh1_challenge)
1138: BN_clear_free(ssh1_challenge);
1139: ssh1_challenge = auth_rsa_generate_challenge(key);
1140:
1141: buffer_clear(m);
1142: buffer_put_bignum2(m, ssh1_challenge);
1143:
1144: debug3("%s sending reply", __FUNCTION__);
1145: mm_request_send(socket, MONITOR_ANS_RSACHALLENGE, m);
1146:
1147:
1148: monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 1);
1149: return (0);
1150: }
1151:
1152: int
1153: mm_answer_rsa_response(int socket, Buffer *m)
1154: {
1155: Key *key = NULL;
1156: u_char *blob, *response;
1157: u_int blen, len;
1158: int success;
1159:
1160: debug3("%s entering", __FUNCTION__);
1161:
1162: if (!authctxt->valid)
1163: fatal("%s: authctxt not valid", __FUNCTION__);
1164: if (ssh1_challenge == NULL)
1165: fatal("%s: no ssh1_challenge", __FUNCTION__);
1166:
1167: blob = buffer_get_string(m, &blen);
1168: if (!monitor_allowed_key(blob, blen))
1169: fatal("%s: bad key, not previously allowed", __FUNCTION__);
1170: if (key_blobtype != MM_RSAUSERKEY && key_blobtype != MM_RSAHOSTKEY)
1171: fatal("%s: key type mismatch: %d", __FUNCTION__, key_blobtype);
1172: if ((key = key_from_blob(blob, blen)) == NULL)
1173: fatal("%s: received bad key", __FUNCTION__);
1174: response = buffer_get_string(m, &len);
1175: if (len != 16)
1176: fatal("%s: received bad response to challenge", __FUNCTION__);
1177: success = auth_rsa_verify_response(key, ssh1_challenge, response);
1178:
1179: key_free(key);
1180: xfree(response);
1181:
1182: auth_method = key_blobtype == MM_RSAUSERKEY ? "rsa" : "rhosts-rsa";
1183:
1184: /* reset state */
1185: BN_clear_free(ssh1_challenge);
1186: ssh1_challenge = NULL;
1187: monitor_reset_key_state();
1188:
1189: buffer_clear(m);
1190: buffer_put_int(m, success);
1191: mm_request_send(socket, MONITOR_ANS_RSARESPONSE, m);
1192:
1193: return (success);
1194: }
1195:
1196: int
1197: mm_answer_term(int socket, Buffer *req)
1198: {
1199: extern struct monitor *monitor;
1200: int res, status;
1201:
1202: debug3("%s: tearing down sessions", __FUNCTION__);
1203:
1204: /* The child is terminating */
1205: session_destroy_all(&mm_session_close);
1206:
1207: if (waitpid(monitor->m_pid, &status, 0) == -1)
1208: exit(1);
1209:
1210: res = WIFEXITED(status) ? WEXITSTATUS(status) : 1;
1211:
1212: /* Terminate process */
1213: exit (res);
1214: }
1215:
1216: void
1217: monitor_apply_keystate(struct monitor *monitor)
1218: {
1219: if (compat20) {
1220: set_newkeys(MODE_IN);
1221: set_newkeys(MODE_OUT);
1222: } else {
1223: u_char key[256];
1224: packet_set_protocol_flags(child_state.ssh1protoflags);
1225: packet_set_encryption_key(key, SSH_SESSION_KEY_LENGTH,
1226: child_state.ssh1cipher);
1227: }
1228:
1229: packet_set_keycontext(MODE_OUT, child_state.keyout);
1230: xfree(child_state.keyout);
1231: packet_set_keycontext(MODE_IN, child_state.keyin);
1232: xfree(child_state.keyin);
1233:
1234: if (!compat20) {
1235: packet_set_iv(MODE_OUT, child_state.ivout);
1236: xfree(child_state.ivout);
1237: packet_set_iv(MODE_IN, child_state.ivin);
1238: xfree(child_state.ivin);
1239: }
1240:
1241: memcpy(&incoming_stream, &child_state.incoming,
1242: sizeof(incoming_stream));
1243: memcpy(&outgoing_stream, &child_state.outgoing,
1244: sizeof(outgoing_stream));
1245:
1246: /* Update with new address */
1247: mm_init_compression(monitor->m_zlib);
1248:
1249: /* Network I/O buffers */
1250: /* XXX inefficient for large buffers, need: buffer_init_from_string */
1251: buffer_clear(&input);
1252: buffer_append(&input, child_state.input, child_state.ilen);
1253: memset(child_state.input, 0, child_state.ilen);
1254: xfree(child_state.input);
1255:
1256: buffer_clear(&output);
1257: buffer_append(&output, child_state.output, child_state.olen);
1258: memset(child_state.output, 0, child_state.olen);
1259: xfree(child_state.output);
1260: }
1261:
1.2 ! markus 1262: static Kex *
1.1 provos 1263: mm_get_kex(Buffer *m)
1264: {
1265: Kex *kex;
1266: void *blob;
1267: u_int bloblen;
1268:
1269: kex = xmalloc(sizeof(*kex));
1270: memset(kex, 0, sizeof(*kex));
1271: kex->session_id = buffer_get_string(m, &kex->session_id_len);
1272: kex->we_need = buffer_get_int(m);
1273: kex->server = 1;
1274: kex->hostkey_type = buffer_get_int(m);
1275: kex->kex_type = buffer_get_int(m);
1276: blob = buffer_get_string(m, &bloblen);
1277: buffer_init(&kex->my);
1278: buffer_append(&kex->my, blob, bloblen);
1279: xfree(blob);
1280: blob = buffer_get_string(m, &bloblen);
1281: buffer_init(&kex->peer);
1282: buffer_append(&kex->peer, blob, bloblen);
1283: xfree(blob);
1284: kex->done = 1;
1285: kex->flags = buffer_get_int(m);
1286: kex->client_version_string = buffer_get_string(m, NULL);
1287: kex->server_version_string = buffer_get_string(m, NULL);
1288: kex->load_host_key=&get_hostkey_by_type;
1289: kex->host_key_index=&get_hostkey_index;
1290:
1291: return (kex);
1292: }
1293:
1294: /* This function requries careful sanity checking */
1295:
1296: void
1297: mm_get_keystate(struct monitor *monitor)
1298: {
1299: Buffer m;
1300: u_char *blob, *p;
1301: u_int bloblen, plen;
1302:
1303: debug3("%s: Waiting for new keys", __FUNCTION__);
1304:
1305: buffer_init(&m);
1306: mm_request_receive_expect(monitor->m_sendfd, MONITOR_REQ_KEYEXPORT, &m);
1307: if (!compat20) {
1308: child_state.ssh1protoflags = buffer_get_int(&m);
1309: child_state.ssh1cipher = buffer_get_int(&m);
1310: child_state.ivout = buffer_get_string(&m,
1311: &child_state.ivoutlen);
1312: child_state.ivin = buffer_get_string(&m, &child_state.ivinlen);
1313: goto skip;
1314: } else {
1315: /* Get the Kex for rekeying */
1316: *monitor->m_pkex = mm_get_kex(&m);
1317: }
1318:
1319: blob = buffer_get_string(&m, &bloblen);
1320: current_keys[MODE_OUT] = mm_newkeys_from_blob(blob, bloblen);
1321: xfree(blob);
1322:
1323: debug3("%s: Waiting for second key", __FUNCTION__);
1324: blob = buffer_get_string(&m, &bloblen);
1325: current_keys[MODE_IN] = mm_newkeys_from_blob(blob, bloblen);
1326: xfree(blob);
1327:
1328: /* Now get sequence numbers for the packets */
1329: packet_set_seqnr(MODE_OUT, buffer_get_int(&m));
1330: packet_set_seqnr(MODE_IN, buffer_get_int(&m));
1331:
1332: skip:
1333: /* Get the key context */
1334: child_state.keyout = buffer_get_string(&m, &child_state.keyoutlen);
1335: child_state.keyin = buffer_get_string(&m, &child_state.keyinlen);
1336:
1337: debug3("%s: Getting compression state", __FUNCTION__);
1338: /* Get compression state */
1339: p = buffer_get_string(&m, &plen);
1340: if (plen != sizeof(child_state.outgoing))
1341: fatal("%s: bad request size", __FUNCTION__);
1342: memcpy(&child_state.outgoing, p, sizeof(child_state.outgoing));
1343: xfree(p);
1344:
1345: p = buffer_get_string(&m, &plen);
1346: if (plen != sizeof(child_state.incoming))
1347: fatal("%s: bad request size", __FUNCTION__);
1348: memcpy(&child_state.incoming, p, sizeof(child_state.incoming));
1349: xfree(p);
1350:
1351: /* Network I/O buffers */
1352: debug3("%s: Getting Network I/O buffers", __FUNCTION__);
1353: child_state.input = buffer_get_string(&m, &child_state.ilen);
1354: child_state.output = buffer_get_string(&m, &child_state.olen);
1355:
1356: buffer_free(&m);
1357: }
1358:
1359:
1360: /* Allocation functions for zlib */
1361: void *
1362: mm_zalloc(struct mm_master *mm, u_int ncount, u_int size)
1363: {
1364: void *address;
1365:
1366: address = mm_malloc(mm, size * ncount);
1367:
1368: return (address);
1369: }
1370:
1371: void
1372: mm_zfree(struct mm_master *mm, void *address)
1373: {
1374: mm_free(mm, address);
1375: }
1376:
1377: void
1378: mm_init_compression(struct mm_master *mm)
1379: {
1380: outgoing_stream.zalloc = (alloc_func)mm_zalloc;
1381: outgoing_stream.zfree = (free_func)mm_zfree;
1382: outgoing_stream.opaque = mm;
1383:
1384: incoming_stream.zalloc = (alloc_func)mm_zalloc;
1385: incoming_stream.zfree = (free_func)mm_zfree;
1386: incoming_stream.opaque = mm;
1387: }
1388:
1389: /* XXX */
1390:
1391: #define FD_CLOSEONEXEC(x) do { \
1392: if (fcntl(x, F_SETFD, 1) == -1) \
1393: fatal("fcntl(%d, F_SETFD)", x); \
1394: } while (0)
1395:
1.2 ! markus 1396: static void
1.1 provos 1397: monitor_socketpair(int *pair)
1398: {
1399: if (socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1)
1400: fatal("%s: socketpair", __FUNCTION__);
1401: FD_CLOSEONEXEC(pair[0]);
1402: FD_CLOSEONEXEC(pair[1]);
1403: }
1404:
1405: #define MM_MEMSIZE 65536
1406:
1407: struct monitor *
1408: monitor_init(void)
1409: {
1410: struct monitor *mon;
1411: int pair[2];
1412:
1413: mon = xmalloc(sizeof(*mon));
1414:
1415: monitor_socketpair(pair);
1416:
1417: mon->m_recvfd = pair[0];
1418: mon->m_sendfd = pair[1];
1419:
1420: /* Used to share zlib space across processes */
1421: mon->m_zback = mm_create(NULL, MM_MEMSIZE);
1422: mon->m_zlib = mm_create(mon->m_zback, 20 * MM_MEMSIZE);
1423:
1424: /* Compression needs to share state across borders */
1425: mm_init_compression(mon->m_zlib);
1426:
1427: return mon;
1428: }
1429:
1430: void
1431: monitor_reinit(struct monitor *mon)
1432: {
1433: int pair[2];
1434:
1435: monitor_socketpair(pair);
1436:
1437: mon->m_recvfd = pair[0];
1438: mon->m_sendfd = pair[1];
1439: }
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