Annotation of src/crypto/external/bsd/openssh/dist/ssh-agent.c, Revision 1.1.1.6
1.1.1.6 ! christos 1: /* $OpenBSD: ssh-agent.c,v 1.177 2013/07/20 01:50:20 djm Exp $ */
1.1 christos 2: /*
3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * The authentication agent program.
7: *
8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
13: *
14: * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
15: *
16: * Redistribution and use in source and binary forms, with or without
17: * modification, are permitted provided that the following conditions
18: * are met:
19: * 1. Redistributions of source code must retain the above copyright
20: * notice, this list of conditions and the following disclaimer.
21: * 2. Redistributions in binary form must reproduce the above copyright
22: * notice, this list of conditions and the following disclaimer in the
23: * documentation and/or other materials provided with the distribution.
24: *
25: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35: */
36:
37: #include <sys/types.h>
38: #include <sys/time.h>
39: #include <sys/queue.h>
40: #include <sys/resource.h>
41: #include <sys/types.h>
42: #include <sys/socket.h>
43: #include <sys/un.h>
44: #include <sys/param.h>
45:
46: #include <openssl/evp.h>
47: #include <openssl/md5.h>
48:
49: #include <errno.h>
50: #include <fcntl.h>
51: #include <paths.h>
52: #include <signal.h>
53: #include <stdlib.h>
54: #include <stdio.h>
55: #include <string.h>
56: #include <time.h>
57: #include <unistd.h>
58:
59: #include "xmalloc.h"
60: #include "ssh.h"
61: #include "rsa.h"
62: #include "buffer.h"
63: #include "key.h"
64: #include "authfd.h"
65: #include "compat.h"
66: #include "log.h"
67: #include "misc.h"
68:
1.1.1.3 adam 69: #ifdef ENABLE_PKCS11
70: #include "ssh-pkcs11.h"
1.1 christos 71: #endif
72:
73: typedef enum {
74: AUTH_UNUSED,
75: AUTH_SOCKET,
76: AUTH_CONNECTION
77: } sock_type;
78:
79: typedef struct {
80: int fd;
81: sock_type type;
82: Buffer input;
83: Buffer output;
84: Buffer request;
85: } SocketEntry;
86:
87: u_int sockets_alloc = 0;
88: SocketEntry *sockets = NULL;
89:
90: typedef struct identity {
91: TAILQ_ENTRY(identity) next;
92: Key *key;
93: char *comment;
1.1.1.3 adam 94: char *provider;
1.1.1.6 ! christos 95: time_t death;
1.1 christos 96: u_int confirm;
97: } Identity;
98:
99: typedef struct {
100: int nentries;
101: TAILQ_HEAD(idqueue, identity) idlist;
102: } Idtab;
103:
104: /* private key table, one per protocol version */
105: Idtab idtable[3];
106:
107: int max_fd = 0;
108:
109: /* pid of shell == parent of agent */
110: pid_t parent_pid = -1;
1.1.1.6 ! christos 111: time_t parent_alive_interval = 0;
1.1 christos 112:
113: /* pathname and directory for AUTH_SOCKET */
114: char socket_name[MAXPATHLEN];
115: char socket_dir[MAXPATHLEN];
116:
117: /* locking */
118: int locked = 0;
119: char *lock_passwd = NULL;
120:
121: extern char *__progname;
122:
1.1.1.6 ! christos 123: /* Default lifetime in seconds (0 == forever) */
! 124: static long lifetime = 0;
1.1 christos 125:
126: static void
127: close_socket(SocketEntry *e)
128: {
129: close(e->fd);
130: e->fd = -1;
131: e->type = AUTH_UNUSED;
132: buffer_free(&e->input);
133: buffer_free(&e->output);
134: buffer_free(&e->request);
135: }
136:
137: static void
138: idtab_init(void)
139: {
140: int i;
141:
142: for (i = 0; i <=2; i++) {
143: TAILQ_INIT(&idtable[i].idlist);
144: idtable[i].nentries = 0;
145: }
146: }
147:
148: /* return private key table for requested protocol version */
149: static Idtab *
150: idtab_lookup(int version)
151: {
152: if (version < 1 || version > 2)
153: fatal("internal error, bad protocol version %d", version);
154: return &idtable[version];
155: }
156:
157: static void
158: free_identity(Identity *id)
159: {
160: key_free(id->key);
1.1.1.6 ! christos 161: free(id->provider);
! 162: free(id->comment);
! 163: free(id);
1.1 christos 164: }
165:
166: /* return matching private key for given public key */
167: static Identity *
168: lookup_identity(Key *key, int version)
169: {
170: Identity *id;
171:
172: Idtab *tab = idtab_lookup(version);
173: TAILQ_FOREACH(id, &tab->idlist, next) {
174: if (key_equal(key, id->key))
175: return (id);
176: }
177: return (NULL);
178: }
179:
180: /* Check confirmation of keysign request */
181: static int
182: confirm_key(Identity *id)
183: {
184: char *p;
185: int ret = -1;
186:
187: p = key_fingerprint(id->key, SSH_FP_MD5, SSH_FP_HEX);
188: if (ask_permission("Allow use of key %s?\nKey fingerprint %s.",
189: id->comment, p))
190: ret = 0;
1.1.1.6 ! christos 191: free(p);
1.1 christos 192:
193: return (ret);
194: }
195:
196: /* send list of supported public keys to 'client' */
197: static void
198: process_request_identities(SocketEntry *e, int version)
199: {
200: Idtab *tab = idtab_lookup(version);
201: Identity *id;
202: Buffer msg;
203:
204: buffer_init(&msg);
205: buffer_put_char(&msg, (version == 1) ?
206: SSH_AGENT_RSA_IDENTITIES_ANSWER : SSH2_AGENT_IDENTITIES_ANSWER);
207: buffer_put_int(&msg, tab->nentries);
208: TAILQ_FOREACH(id, &tab->idlist, next) {
209: if (id->key->type == KEY_RSA1) {
210: buffer_put_int(&msg, BN_num_bits(id->key->rsa->n));
211: buffer_put_bignum(&msg, id->key->rsa->e);
212: buffer_put_bignum(&msg, id->key->rsa->n);
213: } else {
214: u_char *blob;
215: u_int blen;
216: key_to_blob(id->key, &blob, &blen);
217: buffer_put_string(&msg, blob, blen);
1.1.1.6 ! christos 218: free(blob);
1.1 christos 219: }
220: buffer_put_cstring(&msg, id->comment);
221: }
222: buffer_put_int(&e->output, buffer_len(&msg));
223: buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg));
224: buffer_free(&msg);
225: }
226:
227: /* ssh1 only */
228: static void
229: process_authentication_challenge1(SocketEntry *e)
230: {
231: u_char buf[32], mdbuf[16], session_id[16];
232: u_int response_type;
233: BIGNUM *challenge;
234: Identity *id;
235: int i, len;
236: Buffer msg;
237: MD5_CTX md;
238: Key *key;
239:
240: buffer_init(&msg);
241: key = key_new(KEY_RSA1);
242: if ((challenge = BN_new()) == NULL)
243: fatal("process_authentication_challenge1: BN_new failed");
244:
245: (void) buffer_get_int(&e->request); /* ignored */
246: buffer_get_bignum(&e->request, key->rsa->e);
247: buffer_get_bignum(&e->request, key->rsa->n);
248: buffer_get_bignum(&e->request, challenge);
249:
250: /* Only protocol 1.1 is supported */
251: if (buffer_len(&e->request) == 0)
252: goto failure;
253: buffer_get(&e->request, session_id, 16);
254: response_type = buffer_get_int(&e->request);
255: if (response_type != 1)
256: goto failure;
257:
258: id = lookup_identity(key, 1);
259: if (id != NULL && (!id->confirm || confirm_key(id) == 0)) {
260: Key *private = id->key;
261: /* Decrypt the challenge using the private key. */
262: if (rsa_private_decrypt(challenge, challenge, private->rsa) <= 0)
263: goto failure;
264:
265: /* The response is MD5 of decrypted challenge plus session id. */
266: len = BN_num_bytes(challenge);
267: if (len <= 0 || len > 32) {
268: logit("process_authentication_challenge: bad challenge length %d", len);
269: goto failure;
270: }
271: memset(buf, 0, 32);
272: BN_bn2bin(challenge, buf + 32 - len);
273: MD5_Init(&md);
274: MD5_Update(&md, buf, 32);
275: MD5_Update(&md, session_id, 16);
276: MD5_Final(mdbuf, &md);
277:
278: /* Send the response. */
279: buffer_put_char(&msg, SSH_AGENT_RSA_RESPONSE);
280: for (i = 0; i < 16; i++)
281: buffer_put_char(&msg, mdbuf[i]);
282: goto send;
283: }
284:
285: failure:
286: /* Unknown identity or protocol error. Send failure. */
287: buffer_put_char(&msg, SSH_AGENT_FAILURE);
288: send:
289: buffer_put_int(&e->output, buffer_len(&msg));
290: buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg));
291: key_free(key);
292: BN_clear_free(challenge);
293: buffer_free(&msg);
294: }
295:
296: /* ssh2 only */
297: static void
298: process_sign_request2(SocketEntry *e)
299: {
300: u_char *blob, *data, *signature = NULL;
301: u_int blen, dlen, slen = 0;
302: extern int datafellows;
303: int odatafellows;
304: int ok = -1, flags;
305: Buffer msg;
306: Key *key;
307:
308: datafellows = 0;
309:
310: blob = buffer_get_string(&e->request, &blen);
311: data = buffer_get_string(&e->request, &dlen);
312:
313: flags = buffer_get_int(&e->request);
314: odatafellows = datafellows;
315: if (flags & SSH_AGENT_OLD_SIGNATURE)
316: datafellows = SSH_BUG_SIGBLOB;
317:
318: key = key_from_blob(blob, blen);
319: if (key != NULL) {
320: Identity *id = lookup_identity(key, 2);
321: if (id != NULL && (!id->confirm || confirm_key(id) == 0))
322: ok = key_sign(id->key, &signature, &slen, data, dlen);
323: key_free(key);
324: }
325: buffer_init(&msg);
326: if (ok == 0) {
327: buffer_put_char(&msg, SSH2_AGENT_SIGN_RESPONSE);
328: buffer_put_string(&msg, signature, slen);
329: } else {
330: buffer_put_char(&msg, SSH_AGENT_FAILURE);
331: }
332: buffer_put_int(&e->output, buffer_len(&msg));
333: buffer_append(&e->output, buffer_ptr(&msg),
334: buffer_len(&msg));
335: buffer_free(&msg);
1.1.1.6 ! christos 336: free(data);
! 337: free(blob);
! 338: free(signature);
1.1 christos 339: datafellows = odatafellows;
340: }
341:
342: /* shared */
343: static void
344: process_remove_identity(SocketEntry *e, int version)
345: {
346: u_int blen, bits;
347: int success = 0;
348: Key *key = NULL;
349: u_char *blob;
350:
351: switch (version) {
352: case 1:
353: key = key_new(KEY_RSA1);
354: bits = buffer_get_int(&e->request);
355: buffer_get_bignum(&e->request, key->rsa->e);
356: buffer_get_bignum(&e->request, key->rsa->n);
357:
358: if (bits != key_size(key))
359: logit("Warning: identity keysize mismatch: actual %u, announced %u",
360: key_size(key), bits);
361: break;
362: case 2:
363: blob = buffer_get_string(&e->request, &blen);
364: key = key_from_blob(blob, blen);
1.1.1.6 ! christos 365: free(blob);
1.1 christos 366: break;
367: }
368: if (key != NULL) {
369: Identity *id = lookup_identity(key, version);
370: if (id != NULL) {
371: /*
372: * We have this key. Free the old key. Since we
373: * don't want to leave empty slots in the middle of
374: * the array, we actually free the key there and move
375: * all the entries between the empty slot and the end
376: * of the array.
377: */
378: Idtab *tab = idtab_lookup(version);
379: if (tab->nentries < 1)
380: fatal("process_remove_identity: "
381: "internal error: tab->nentries %d",
382: tab->nentries);
383: TAILQ_REMOVE(&tab->idlist, id, next);
384: free_identity(id);
385: tab->nentries--;
386: success = 1;
387: }
388: key_free(key);
389: }
390: buffer_put_int(&e->output, 1);
391: buffer_put_char(&e->output,
392: success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE);
393: }
394:
395: static void
396: process_remove_all_identities(SocketEntry *e, int version)
397: {
398: Idtab *tab = idtab_lookup(version);
399: Identity *id;
400:
401: /* Loop over all identities and clear the keys. */
402: for (id = TAILQ_FIRST(&tab->idlist); id;
403: id = TAILQ_FIRST(&tab->idlist)) {
404: TAILQ_REMOVE(&tab->idlist, id, next);
405: free_identity(id);
406: }
407:
408: /* Mark that there are no identities. */
409: tab->nentries = 0;
410:
411: /* Send success. */
412: buffer_put_int(&e->output, 1);
413: buffer_put_char(&e->output, SSH_AGENT_SUCCESS);
414: }
415:
416: /* removes expired keys and returns number of seconds until the next expiry */
1.1.1.6 ! christos 417: static time_t
1.1 christos 418: reaper(void)
419: {
1.1.1.6 ! christos 420: time_t deadline = 0, now = monotime();
1.1 christos 421: Identity *id, *nxt;
422: int version;
423: Idtab *tab;
424:
425: for (version = 1; version < 3; version++) {
426: tab = idtab_lookup(version);
427: for (id = TAILQ_FIRST(&tab->idlist); id; id = nxt) {
428: nxt = TAILQ_NEXT(id, next);
429: if (id->death == 0)
430: continue;
431: if (now >= id->death) {
432: debug("expiring key '%s'", id->comment);
433: TAILQ_REMOVE(&tab->idlist, id, next);
434: free_identity(id);
435: tab->nentries--;
436: } else
437: deadline = (deadline == 0) ? id->death :
438: MIN(deadline, id->death);
439: }
440: }
441: if (deadline == 0 || deadline <= now)
442: return 0;
443: else
444: return (deadline - now);
445: }
446:
447: static void
448: process_add_identity(SocketEntry *e, int version)
449: {
450: Idtab *tab = idtab_lookup(version);
451: Identity *id;
1.1.1.6 ! christos 452: int type, success = 0, confirm = 0;
1.1.1.4 christos 453: char *type_name, *comment, *curve;
1.1.1.6 ! christos 454: time_t death = 0;
1.1 christos 455: Key *k = NULL;
1.1.1.4 christos 456: BIGNUM *exponent;
457: EC_POINT *q;
1.1.1.3 adam 458: u_char *cert;
459: u_int len;
1.1 christos 460:
461: switch (version) {
462: case 1:
463: k = key_new_private(KEY_RSA1);
464: (void) buffer_get_int(&e->request); /* ignored */
465: buffer_get_bignum(&e->request, k->rsa->n);
466: buffer_get_bignum(&e->request, k->rsa->e);
467: buffer_get_bignum(&e->request, k->rsa->d);
468: buffer_get_bignum(&e->request, k->rsa->iqmp);
469:
470: /* SSH and SSL have p and q swapped */
471: buffer_get_bignum(&e->request, k->rsa->q); /* p */
472: buffer_get_bignum(&e->request, k->rsa->p); /* q */
473:
474: /* Generate additional parameters */
475: rsa_generate_additional_parameters(k->rsa);
476: break;
477: case 2:
478: type_name = buffer_get_string(&e->request, NULL);
479: type = key_type_from_name(type_name);
480: switch (type) {
481: case KEY_DSA:
482: k = key_new_private(type);
483: buffer_get_bignum2(&e->request, k->dsa->p);
484: buffer_get_bignum2(&e->request, k->dsa->q);
485: buffer_get_bignum2(&e->request, k->dsa->g);
486: buffer_get_bignum2(&e->request, k->dsa->pub_key);
487: buffer_get_bignum2(&e->request, k->dsa->priv_key);
488: break;
1.1.1.3 adam 489: case KEY_DSA_CERT_V00:
490: case KEY_DSA_CERT:
491: cert = buffer_get_string(&e->request, &len);
492: if ((k = key_from_blob(cert, len)) == NULL)
493: fatal("Certificate parse failed");
1.1.1.6 ! christos 494: free(cert);
1.1.1.3 adam 495: key_add_private(k);
496: buffer_get_bignum2(&e->request, k->dsa->priv_key);
497: break;
1.1.1.4 christos 498: case KEY_ECDSA:
499: k = key_new_private(type);
500: k->ecdsa_nid = key_ecdsa_nid_from_name(type_name);
501: curve = buffer_get_string(&e->request, NULL);
502: if (k->ecdsa_nid != key_curve_name_to_nid(curve))
503: fatal("%s: curve names mismatch", __func__);
1.1.1.6 ! christos 504: free(curve);
1.1.1.4 christos 505: k->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
506: if (k->ecdsa == NULL)
507: fatal("%s: EC_KEY_new_by_curve_name failed",
508: __func__);
509: q = EC_POINT_new(EC_KEY_get0_group(k->ecdsa));
510: if (q == NULL)
511: fatal("%s: BN_new failed", __func__);
512: if ((exponent = BN_new()) == NULL)
513: fatal("%s: BN_new failed", __func__);
514: buffer_get_ecpoint(&e->request,
515: EC_KEY_get0_group(k->ecdsa), q);
516: buffer_get_bignum2(&e->request, exponent);
517: if (EC_KEY_set_public_key(k->ecdsa, q) != 1)
518: fatal("%s: EC_KEY_set_public_key failed",
519: __func__);
520: if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1)
521: fatal("%s: EC_KEY_set_private_key failed",
522: __func__);
523: if (key_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
524: EC_KEY_get0_public_key(k->ecdsa)) != 0)
525: fatal("%s: bad ECDSA public key", __func__);
526: if (key_ec_validate_private(k->ecdsa) != 0)
527: fatal("%s: bad ECDSA private key", __func__);
528: BN_clear_free(exponent);
529: EC_POINT_free(q);
530: break;
531: case KEY_ECDSA_CERT:
532: cert = buffer_get_string(&e->request, &len);
533: if ((k = key_from_blob(cert, len)) == NULL)
534: fatal("Certificate parse failed");
1.1.1.6 ! christos 535: free(cert);
1.1.1.4 christos 536: key_add_private(k);
537: if ((exponent = BN_new()) == NULL)
538: fatal("%s: BN_new failed", __func__);
539: buffer_get_bignum2(&e->request, exponent);
540: if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1)
541: fatal("%s: EC_KEY_set_private_key failed",
542: __func__);
543: if (key_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
544: EC_KEY_get0_public_key(k->ecdsa)) != 0 ||
545: key_ec_validate_private(k->ecdsa) != 0)
546: fatal("%s: bad ECDSA key", __func__);
547: BN_clear_free(exponent);
548: break;
1.1 christos 549: case KEY_RSA:
550: k = key_new_private(type);
551: buffer_get_bignum2(&e->request, k->rsa->n);
552: buffer_get_bignum2(&e->request, k->rsa->e);
553: buffer_get_bignum2(&e->request, k->rsa->d);
554: buffer_get_bignum2(&e->request, k->rsa->iqmp);
555: buffer_get_bignum2(&e->request, k->rsa->p);
556: buffer_get_bignum2(&e->request, k->rsa->q);
557:
558: /* Generate additional parameters */
559: rsa_generate_additional_parameters(k->rsa);
560: break;
1.1.1.3 adam 561: case KEY_RSA_CERT_V00:
562: case KEY_RSA_CERT:
563: cert = buffer_get_string(&e->request, &len);
564: if ((k = key_from_blob(cert, len)) == NULL)
565: fatal("Certificate parse failed");
1.1.1.6 ! christos 566: free(cert);
1.1.1.3 adam 567: key_add_private(k);
568: buffer_get_bignum2(&e->request, k->rsa->d);
569: buffer_get_bignum2(&e->request, k->rsa->iqmp);
570: buffer_get_bignum2(&e->request, k->rsa->p);
571: buffer_get_bignum2(&e->request, k->rsa->q);
572: break;
1.1 christos 573: default:
1.1.1.6 ! christos 574: free(type_name);
1.1 christos 575: buffer_clear(&e->request);
576: goto send;
577: }
1.1.1.6 ! christos 578: free(type_name);
1.1 christos 579: break;
580: }
581: /* enable blinding */
582: switch (k->type) {
583: case KEY_RSA:
1.1.1.3 adam 584: case KEY_RSA_CERT_V00:
585: case KEY_RSA_CERT:
1.1 christos 586: case KEY_RSA1:
587: if (RSA_blinding_on(k->rsa, NULL) != 1) {
588: error("process_add_identity: RSA_blinding_on failed");
589: key_free(k);
590: goto send;
591: }
592: break;
593: }
594: comment = buffer_get_string(&e->request, NULL);
595: if (k == NULL) {
1.1.1.6 ! christos 596: free(comment);
1.1 christos 597: goto send;
598: }
599: while (buffer_len(&e->request)) {
600: switch ((type = buffer_get_char(&e->request))) {
601: case SSH_AGENT_CONSTRAIN_LIFETIME:
1.1.1.6 ! christos 602: death = monotime() + buffer_get_int(&e->request);
1.1 christos 603: break;
604: case SSH_AGENT_CONSTRAIN_CONFIRM:
605: confirm = 1;
606: break;
607: default:
608: error("process_add_identity: "
609: "Unknown constraint type %d", type);
1.1.1.6 ! christos 610: free(comment);
1.1 christos 611: key_free(k);
612: goto send;
613: }
614: }
615: success = 1;
616: if (lifetime && !death)
1.1.1.6 ! christos 617: death = monotime() + lifetime;
1.1 christos 618: if ((id = lookup_identity(k, version)) == NULL) {
1.1.1.3 adam 619: id = xcalloc(1, sizeof(Identity));
1.1 christos 620: id->key = k;
621: TAILQ_INSERT_TAIL(&tab->idlist, id, next);
622: /* Increment the number of identities. */
623: tab->nentries++;
624: } else {
625: key_free(k);
1.1.1.6 ! christos 626: free(id->comment);
1.1 christos 627: }
628: id->comment = comment;
629: id->death = death;
630: id->confirm = confirm;
631: send:
632: buffer_put_int(&e->output, 1);
633: buffer_put_char(&e->output,
634: success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE);
635: }
636:
637: /* XXX todo: encrypt sensitive data with passphrase */
638: static void
639: process_lock_agent(SocketEntry *e, int lock)
640: {
641: int success = 0;
642: char *passwd;
643:
644: passwd = buffer_get_string(&e->request, NULL);
645: if (locked && !lock && strcmp(passwd, lock_passwd) == 0) {
646: locked = 0;
647: memset(lock_passwd, 0, strlen(lock_passwd));
1.1.1.6 ! christos 648: free(lock_passwd);
1.1 christos 649: lock_passwd = NULL;
650: success = 1;
651: } else if (!locked && lock) {
652: locked = 1;
653: lock_passwd = xstrdup(passwd);
654: success = 1;
655: }
656: memset(passwd, 0, strlen(passwd));
1.1.1.6 ! christos 657: free(passwd);
1.1 christos 658:
659: buffer_put_int(&e->output, 1);
660: buffer_put_char(&e->output,
661: success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE);
662: }
663:
664: static void
665: no_identities(SocketEntry *e, u_int type)
666: {
667: Buffer msg;
668:
669: buffer_init(&msg);
670: buffer_put_char(&msg,
671: (type == SSH_AGENTC_REQUEST_RSA_IDENTITIES) ?
672: SSH_AGENT_RSA_IDENTITIES_ANSWER : SSH2_AGENT_IDENTITIES_ANSWER);
673: buffer_put_int(&msg, 0);
674: buffer_put_int(&e->output, buffer_len(&msg));
675: buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg));
676: buffer_free(&msg);
677: }
678:
1.1.1.3 adam 679: #ifdef ENABLE_PKCS11
1.1 christos 680: static void
681: process_add_smartcard_key(SocketEntry *e)
682: {
1.1.1.3 adam 683: char *provider = NULL, *pin;
1.1.1.6 ! christos 684: int i, type, version, count = 0, success = 0, confirm = 0;
! 685: time_t death = 0;
1.1.1.3 adam 686: Key **keys = NULL, *k;
1.1 christos 687: Identity *id;
688: Idtab *tab;
689:
1.1.1.3 adam 690: provider = buffer_get_string(&e->request, NULL);
1.1 christos 691: pin = buffer_get_string(&e->request, NULL);
692:
693: while (buffer_len(&e->request)) {
694: switch ((type = buffer_get_char(&e->request))) {
695: case SSH_AGENT_CONSTRAIN_LIFETIME:
1.1.1.6 ! christos 696: death = monotime() + buffer_get_int(&e->request);
1.1 christos 697: break;
698: case SSH_AGENT_CONSTRAIN_CONFIRM:
699: confirm = 1;
700: break;
701: default:
702: error("process_add_smartcard_key: "
703: "Unknown constraint type %d", type);
704: goto send;
705: }
706: }
707: if (lifetime && !death)
1.1.1.6 ! christos 708: death = monotime() + lifetime;
1.1 christos 709:
1.1.1.3 adam 710: count = pkcs11_add_provider(provider, pin, &keys);
711: for (i = 0; i < count; i++) {
1.1 christos 712: k = keys[i];
713: version = k->type == KEY_RSA1 ? 1 : 2;
714: tab = idtab_lookup(version);
715: if (lookup_identity(k, version) == NULL) {
1.1.1.3 adam 716: id = xcalloc(1, sizeof(Identity));
1.1 christos 717: id->key = k;
1.1.1.3 adam 718: id->provider = xstrdup(provider);
719: id->comment = xstrdup(provider); /* XXX */
1.1 christos 720: id->death = death;
721: id->confirm = confirm;
722: TAILQ_INSERT_TAIL(&tab->idlist, id, next);
723: tab->nentries++;
724: success = 1;
725: } else {
726: key_free(k);
727: }
728: keys[i] = NULL;
729: }
730: send:
1.1.1.6 ! christos 731: free(pin);
! 732: free(provider);
! 733: free(keys);
1.1 christos 734: buffer_put_int(&e->output, 1);
735: buffer_put_char(&e->output,
736: success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE);
737: }
738:
739: static void
740: process_remove_smartcard_key(SocketEntry *e)
741: {
1.1.1.3 adam 742: char *provider = NULL, *pin = NULL;
743: int version, success = 0;
744: Identity *id, *nxt;
1.1 christos 745: Idtab *tab;
746:
1.1.1.3 adam 747: provider = buffer_get_string(&e->request, NULL);
1.1 christos 748: pin = buffer_get_string(&e->request, NULL);
1.1.1.6 ! christos 749: free(pin);
1.1 christos 750:
1.1.1.3 adam 751: for (version = 1; version < 3; version++) {
752: tab = idtab_lookup(version);
753: for (id = TAILQ_FIRST(&tab->idlist); id; id = nxt) {
754: nxt = TAILQ_NEXT(id, next);
755: if (!strcmp(provider, id->provider)) {
756: TAILQ_REMOVE(&tab->idlist, id, next);
757: free_identity(id);
758: tab->nentries--;
759: }
1.1 christos 760: }
761: }
1.1.1.3 adam 762: if (pkcs11_del_provider(provider) == 0)
763: success = 1;
764: else
765: error("process_remove_smartcard_key:"
766: " pkcs11_del_provider failed");
1.1.1.6 ! christos 767: free(provider);
1.1 christos 768: buffer_put_int(&e->output, 1);
769: buffer_put_char(&e->output,
770: success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE);
771: }
1.1.1.3 adam 772: #endif /* ENABLE_PKCS11 */
1.1 christos 773:
774: /* dispatch incoming messages */
775:
776: static void
777: process_message(SocketEntry *e)
778: {
779: u_int msg_len, type;
780: u_char *cp;
781:
782: if (buffer_len(&e->input) < 5)
783: return; /* Incomplete message. */
784: cp = buffer_ptr(&e->input);
785: msg_len = get_u32(cp);
786: if (msg_len > 256 * 1024) {
787: close_socket(e);
788: return;
789: }
790: if (buffer_len(&e->input) < msg_len + 4)
791: return;
792:
793: /* move the current input to e->request */
794: buffer_consume(&e->input, 4);
795: buffer_clear(&e->request);
796: buffer_append(&e->request, buffer_ptr(&e->input), msg_len);
797: buffer_consume(&e->input, msg_len);
798: type = buffer_get_char(&e->request);
799:
800: /* check wheter agent is locked */
801: if (locked && type != SSH_AGENTC_UNLOCK) {
802: buffer_clear(&e->request);
803: switch (type) {
804: case SSH_AGENTC_REQUEST_RSA_IDENTITIES:
805: case SSH2_AGENTC_REQUEST_IDENTITIES:
806: /* send empty lists */
807: no_identities(e, type);
808: break;
809: default:
810: /* send a fail message for all other request types */
811: buffer_put_int(&e->output, 1);
812: buffer_put_char(&e->output, SSH_AGENT_FAILURE);
813: }
814: return;
815: }
816:
817: debug("type %d", type);
818: switch (type) {
819: case SSH_AGENTC_LOCK:
820: case SSH_AGENTC_UNLOCK:
821: process_lock_agent(e, type == SSH_AGENTC_LOCK);
822: break;
823: /* ssh1 */
824: case SSH_AGENTC_RSA_CHALLENGE:
825: process_authentication_challenge1(e);
826: break;
827: case SSH_AGENTC_REQUEST_RSA_IDENTITIES:
828: process_request_identities(e, 1);
829: break;
830: case SSH_AGENTC_ADD_RSA_IDENTITY:
831: case SSH_AGENTC_ADD_RSA_ID_CONSTRAINED:
832: process_add_identity(e, 1);
833: break;
834: case SSH_AGENTC_REMOVE_RSA_IDENTITY:
835: process_remove_identity(e, 1);
836: break;
837: case SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES:
838: process_remove_all_identities(e, 1);
839: break;
840: /* ssh2 */
841: case SSH2_AGENTC_SIGN_REQUEST:
842: process_sign_request2(e);
843: break;
844: case SSH2_AGENTC_REQUEST_IDENTITIES:
845: process_request_identities(e, 2);
846: break;
847: case SSH2_AGENTC_ADD_IDENTITY:
848: case SSH2_AGENTC_ADD_ID_CONSTRAINED:
849: process_add_identity(e, 2);
850: break;
851: case SSH2_AGENTC_REMOVE_IDENTITY:
852: process_remove_identity(e, 2);
853: break;
854: case SSH2_AGENTC_REMOVE_ALL_IDENTITIES:
855: process_remove_all_identities(e, 2);
856: break;
1.1.1.3 adam 857: #ifdef ENABLE_PKCS11
1.1 christos 858: case SSH_AGENTC_ADD_SMARTCARD_KEY:
859: case SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED:
860: process_add_smartcard_key(e);
861: break;
862: case SSH_AGENTC_REMOVE_SMARTCARD_KEY:
863: process_remove_smartcard_key(e);
864: break;
1.1.1.3 adam 865: #endif /* ENABLE_PKCS11 */
1.1 christos 866: default:
867: /* Unknown message. Respond with failure. */
868: error("Unknown message %d", type);
869: buffer_clear(&e->request);
870: buffer_put_int(&e->output, 1);
871: buffer_put_char(&e->output, SSH_AGENT_FAILURE);
872: break;
873: }
874: }
875:
876: static void
877: new_socket(sock_type type, int fd)
878: {
879: u_int i, old_alloc, new_alloc;
880:
881: set_nonblock(fd);
882:
883: if (fd > max_fd)
884: max_fd = fd;
885:
886: for (i = 0; i < sockets_alloc; i++)
887: if (sockets[i].type == AUTH_UNUSED) {
888: sockets[i].fd = fd;
889: buffer_init(&sockets[i].input);
890: buffer_init(&sockets[i].output);
891: buffer_init(&sockets[i].request);
892: sockets[i].type = type;
893: return;
894: }
895: old_alloc = sockets_alloc;
896: new_alloc = sockets_alloc + 10;
897: sockets = xrealloc(sockets, new_alloc, sizeof(sockets[0]));
898: for (i = old_alloc; i < new_alloc; i++)
899: sockets[i].type = AUTH_UNUSED;
900: sockets_alloc = new_alloc;
901: sockets[old_alloc].fd = fd;
902: buffer_init(&sockets[old_alloc].input);
903: buffer_init(&sockets[old_alloc].output);
904: buffer_init(&sockets[old_alloc].request);
905: sockets[old_alloc].type = type;
906: }
907:
908: static int
909: prepare_select(fd_set **fdrp, fd_set **fdwp, int *fdl, u_int *nallocp,
910: struct timeval **tvpp)
911: {
1.1.1.6 ! christos 912: u_int i, sz;
1.1 christos 913: int n = 0;
914: static struct timeval tv;
1.1.1.6 ! christos 915: time_t deadline;
1.1 christos 916:
917: for (i = 0; i < sockets_alloc; i++) {
918: switch (sockets[i].type) {
919: case AUTH_SOCKET:
920: case AUTH_CONNECTION:
921: n = MAX(n, sockets[i].fd);
922: break;
923: case AUTH_UNUSED:
924: break;
925: default:
926: fatal("Unknown socket type %d", sockets[i].type);
927: break;
928: }
929: }
930:
931: sz = howmany(n+1, NFDBITS) * sizeof(fd_mask);
932: if (*fdrp == NULL || sz > *nallocp) {
1.1.1.6 ! christos 933: free(*fdrp);
! 934: free(*fdwp);
1.1 christos 935: *fdrp = xmalloc(sz);
936: *fdwp = xmalloc(sz);
937: *nallocp = sz;
938: }
939: if (n < *fdl)
940: debug("XXX shrink: %d < %d", n, *fdl);
941: *fdl = n;
942: memset(*fdrp, 0, sz);
943: memset(*fdwp, 0, sz);
944:
945: for (i = 0; i < sockets_alloc; i++) {
946: switch (sockets[i].type) {
947: case AUTH_SOCKET:
948: case AUTH_CONNECTION:
949: FD_SET(sockets[i].fd, *fdrp);
950: if (buffer_len(&sockets[i].output) > 0)
951: FD_SET(sockets[i].fd, *fdwp);
952: break;
953: default:
954: break;
955: }
956: }
957: deadline = reaper();
958: if (parent_alive_interval != 0)
959: deadline = (deadline == 0) ? parent_alive_interval :
960: MIN(deadline, parent_alive_interval);
961: if (deadline == 0) {
962: *tvpp = NULL;
963: } else {
964: tv.tv_sec = deadline;
965: tv.tv_usec = 0;
966: *tvpp = &tv;
967: }
968: return (1);
969: }
970:
971: static void
972: after_select(fd_set *readset, fd_set *writeset)
973: {
974: struct sockaddr_un sunaddr;
975: socklen_t slen;
976: char buf[1024];
977: int len, sock;
1.1.1.3 adam 978: u_int i, orig_alloc;
1.1 christos 979: uid_t euid;
980: gid_t egid;
981:
1.1.1.3 adam 982: for (i = 0, orig_alloc = sockets_alloc; i < orig_alloc; i++)
1.1 christos 983: switch (sockets[i].type) {
984: case AUTH_UNUSED:
985: break;
986: case AUTH_SOCKET:
987: if (FD_ISSET(sockets[i].fd, readset)) {
988: slen = sizeof(sunaddr);
989: sock = accept(sockets[i].fd,
990: (struct sockaddr *)&sunaddr, &slen);
991: if (sock < 0) {
992: error("accept from AUTH_SOCKET: %s",
993: strerror(errno));
994: break;
995: }
996: if (getpeereid(sock, &euid, &egid) < 0) {
997: error("getpeereid %d failed: %s",
998: sock, strerror(errno));
999: close(sock);
1000: break;
1001: }
1002: if ((euid != 0) && (getuid() != euid)) {
1003: error("uid mismatch: "
1004: "peer euid %u != uid %u",
1005: (u_int) euid, (u_int) getuid());
1006: close(sock);
1007: break;
1008: }
1009: new_socket(AUTH_CONNECTION, sock);
1010: }
1011: break;
1012: case AUTH_CONNECTION:
1013: if (buffer_len(&sockets[i].output) > 0 &&
1014: FD_ISSET(sockets[i].fd, writeset)) {
1.1.1.3 adam 1015: len = write(sockets[i].fd,
1016: buffer_ptr(&sockets[i].output),
1017: buffer_len(&sockets[i].output));
1018: if (len == -1 && (errno == EAGAIN ||
1019: errno == EINTR))
1020: continue;
1.1 christos 1021: if (len <= 0) {
1022: close_socket(&sockets[i]);
1023: break;
1024: }
1025: buffer_consume(&sockets[i].output, len);
1026: }
1027: if (FD_ISSET(sockets[i].fd, readset)) {
1.1.1.3 adam 1028: len = read(sockets[i].fd, buf, sizeof(buf));
1029: if (len == -1 && (errno == EAGAIN ||
1030: errno == EINTR))
1031: continue;
1.1 christos 1032: if (len <= 0) {
1033: close_socket(&sockets[i]);
1034: break;
1035: }
1036: buffer_append(&sockets[i].input, buf, len);
1037: process_message(&sockets[i]);
1038: }
1039: break;
1040: default:
1041: fatal("Unknown type %d", sockets[i].type);
1042: }
1043: }
1044:
1045: static void
1046: cleanup_socket(void)
1047: {
1048: if (socket_name[0])
1049: unlink(socket_name);
1050: if (socket_dir[0])
1051: rmdir(socket_dir);
1052: }
1053:
1054: void
1055: cleanup_exit(int i)
1056: {
1057: cleanup_socket();
1058: _exit(i);
1059: }
1060:
1061: /*ARGSUSED*/
1062: static void
1063: cleanup_handler(int sig)
1064: {
1065: cleanup_socket();
1.1.1.3 adam 1066: #ifdef ENABLE_PKCS11
1067: pkcs11_terminate();
1068: #endif
1.1 christos 1069: _exit(2);
1070: }
1071:
1072: static void
1073: check_parent_exists(void)
1074: {
1.1.1.5 christos 1075: /*
1076: * If our parent has exited then getppid() will return (pid_t)1,
1077: * so testing for that should be safe.
1078: */
1079: if (parent_pid != -1 && getppid() != parent_pid) {
1.1 christos 1080: /* printf("Parent has died - Authentication agent exiting.\n"); */
1081: cleanup_socket();
1082: _exit(2);
1083: }
1084: }
1085:
1086: static void
1087: usage(void)
1088: {
1089: fprintf(stderr, "usage: %s [options] [command [arg ...]]\n",
1090: __progname);
1091: fprintf(stderr, "Options:\n");
1092: fprintf(stderr, " -c Generate C-shell commands on stdout.\n");
1093: fprintf(stderr, " -s Generate Bourne shell commands on stdout.\n");
1094: fprintf(stderr, " -k Kill the current agent.\n");
1095: fprintf(stderr, " -d Debug mode.\n");
1096: fprintf(stderr, " -a socket Bind agent socket to given name.\n");
1097: fprintf(stderr, " -t life Default identity lifetime (seconds).\n");
1098: exit(1);
1099: }
1100:
1101: int
1102: main(int ac, char **av)
1103: {
1104: int c_flag = 0, d_flag = 0, k_flag = 0, s_flag = 0;
1105: int sock, fd, ch, result, saved_errno;
1106: u_int nalloc;
1107: char *shell, *format, *pidstr, *agentsocket = NULL;
1108: fd_set *readsetp = NULL, *writesetp = NULL;
1109: struct sockaddr_un sunaddr;
1110: struct rlimit rlim;
1111: extern int optind;
1112: extern char *optarg;
1113: pid_t pid;
1114: char pidstrbuf[1 + 3 * sizeof pid];
1115: struct timeval *tvp = NULL;
1.1.1.2 christos 1116: size_t len;
1.1 christos 1117:
1118: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
1119: sanitise_stdfd();
1120:
1121: /* drop */
1122: setegid(getgid());
1123: setgid(getgid());
1124:
1.1.1.4 christos 1125: OpenSSL_add_all_algorithms();
1.1 christos 1126:
1127: while ((ch = getopt(ac, av, "cdksa:t:")) != -1) {
1128: switch (ch) {
1129: case 'c':
1130: if (s_flag)
1131: usage();
1132: c_flag++;
1133: break;
1134: case 'k':
1135: k_flag++;
1136: break;
1137: case 's':
1138: if (c_flag)
1139: usage();
1140: s_flag++;
1141: break;
1142: case 'd':
1143: if (d_flag)
1144: usage();
1145: d_flag++;
1146: break;
1147: case 'a':
1148: agentsocket = optarg;
1149: break;
1150: case 't':
1151: if ((lifetime = convtime(optarg)) == -1) {
1152: fprintf(stderr, "Invalid lifetime\n");
1153: usage();
1154: }
1155: break;
1156: default:
1157: usage();
1158: }
1159: }
1160: ac -= optind;
1161: av += optind;
1162:
1163: if (ac > 0 && (c_flag || k_flag || s_flag || d_flag))
1164: usage();
1165:
1166: if (ac == 0 && !c_flag && !s_flag) {
1167: shell = getenv("SHELL");
1.1.1.2 christos 1168: if (shell != NULL && (len = strlen(shell)) > 2 &&
1169: strncmp(shell + len - 3, "csh", 3) == 0)
1.1 christos 1170: c_flag = 1;
1171: }
1172: if (k_flag) {
1173: const char *errstr = NULL;
1174:
1175: pidstr = getenv(SSH_AGENTPID_ENV_NAME);
1176: if (pidstr == NULL) {
1177: fprintf(stderr, "%s not set, cannot kill agent\n",
1178: SSH_AGENTPID_ENV_NAME);
1179: exit(1);
1180: }
1181: pid = (int)strtonum(pidstr, 2, INT_MAX, &errstr);
1182: if (errstr) {
1183: fprintf(stderr,
1184: "%s=\"%s\", which is not a good PID: %s\n",
1185: SSH_AGENTPID_ENV_NAME, pidstr, errstr);
1186: exit(1);
1187: }
1188: if (kill(pid, SIGTERM) == -1) {
1189: perror("kill");
1190: exit(1);
1191: }
1192: format = c_flag ? "unsetenv %s;\n" : "unset %s;\n";
1193: printf(format, SSH_AUTHSOCKET_ENV_NAME);
1194: printf(format, SSH_AGENTPID_ENV_NAME);
1195: printf("echo Agent pid %ld killed;\n", (long)pid);
1196: exit(0);
1197: }
1198: parent_pid = getpid();
1199:
1200: if (agentsocket == NULL) {
1201: /* Create private directory for agent socket */
1.1.1.4 christos 1202: mktemp_proto(socket_dir, sizeof(socket_dir));
1.1 christos 1203: if (mkdtemp(socket_dir) == NULL) {
1204: perror("mkdtemp: private socket dir");
1205: exit(1);
1206: }
1207: snprintf(socket_name, sizeof socket_name, "%s/agent.%ld", socket_dir,
1208: (long)parent_pid);
1209: } else {
1210: /* Try to use specified agent socket */
1211: socket_dir[0] = '\0';
1212: strlcpy(socket_name, agentsocket, sizeof socket_name);
1213: }
1214:
1215: /*
1216: * Create socket early so it will exist before command gets run from
1217: * the parent.
1218: */
1219: sock = socket(AF_UNIX, SOCK_STREAM, 0);
1220: if (sock < 0) {
1221: perror("socket");
1222: *socket_name = '\0'; /* Don't unlink any existing file */
1223: cleanup_exit(1);
1224: }
1225: memset(&sunaddr, 0, sizeof(sunaddr));
1226: sunaddr.sun_family = AF_UNIX;
1227: strlcpy(sunaddr.sun_path, socket_name, sizeof(sunaddr.sun_path));
1228: if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0) {
1229: perror("bind");
1230: *socket_name = '\0'; /* Don't unlink any existing file */
1231: cleanup_exit(1);
1232: }
1233: if (listen(sock, SSH_LISTEN_BACKLOG) < 0) {
1234: perror("listen");
1235: cleanup_exit(1);
1236: }
1237:
1238: /*
1239: * Fork, and have the parent execute the command, if any, or present
1240: * the socket data. The child continues as the authentication agent.
1241: */
1242: if (d_flag) {
1243: log_init(__progname, SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 1);
1244: format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n";
1245: printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name,
1246: SSH_AUTHSOCKET_ENV_NAME);
1247: printf("echo Agent pid %ld;\n", (long)parent_pid);
1248: goto skip;
1249: }
1250: pid = fork();
1251: if (pid == -1) {
1252: perror("fork");
1253: cleanup_exit(1);
1254: }
1255: if (pid != 0) { /* Parent - execute the given command. */
1256: close(sock);
1257: snprintf(pidstrbuf, sizeof pidstrbuf, "%ld", (long)pid);
1258: if (ac == 0) {
1259: format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n";
1260: printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name,
1261: SSH_AUTHSOCKET_ENV_NAME);
1262: printf(format, SSH_AGENTPID_ENV_NAME, pidstrbuf,
1263: SSH_AGENTPID_ENV_NAME);
1264: printf("echo Agent pid %ld;\n", (long)pid);
1265: exit(0);
1266: }
1267: if (setenv(SSH_AUTHSOCKET_ENV_NAME, socket_name, 1) == -1 ||
1268: setenv(SSH_AGENTPID_ENV_NAME, pidstrbuf, 1) == -1) {
1269: perror("setenv");
1270: exit(1);
1271: }
1272: execvp(av[0], av);
1273: perror(av[0]);
1274: exit(1);
1275: }
1276: /* child */
1277: log_init(__progname, SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_AUTH, 0);
1278:
1279: if (setsid() == -1) {
1280: error("setsid: %s", strerror(errno));
1281: cleanup_exit(1);
1282: }
1283:
1284: (void)chdir("/");
1285: if ((fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
1286: /* XXX might close listen socket */
1287: (void)dup2(fd, STDIN_FILENO);
1288: (void)dup2(fd, STDOUT_FILENO);
1289: (void)dup2(fd, STDERR_FILENO);
1290: if (fd > 2)
1291: close(fd);
1292: }
1293:
1294: /* deny core dumps, since memory contains unencrypted private keys */
1295: rlim.rlim_cur = rlim.rlim_max = 0;
1296: if (setrlimit(RLIMIT_CORE, &rlim) < 0) {
1297: error("setrlimit RLIMIT_CORE: %s", strerror(errno));
1298: cleanup_exit(1);
1299: }
1300:
1301: skip:
1.1.1.3 adam 1302:
1303: #ifdef ENABLE_PKCS11
1304: pkcs11_init(0);
1305: #endif
1.1 christos 1306: new_socket(AUTH_SOCKET, sock);
1307: if (ac > 0)
1308: parent_alive_interval = 10;
1309: idtab_init();
1310: signal(SIGPIPE, SIG_IGN);
1.1.1.6 ! christos 1311: signal(SIGINT, d_flag ? cleanup_handler : SIG_IGN);
1.1 christos 1312: signal(SIGHUP, cleanup_handler);
1313: signal(SIGTERM, cleanup_handler);
1314: nalloc = 0;
1315:
1316: while (1) {
1317: prepare_select(&readsetp, &writesetp, &max_fd, &nalloc, &tvp);
1318: result = select(max_fd + 1, readsetp, writesetp, NULL, tvp);
1319: saved_errno = errno;
1320: if (parent_alive_interval != 0)
1321: check_parent_exists();
1322: (void) reaper(); /* remove expired keys */
1323: if (result < 0) {
1324: if (saved_errno == EINTR)
1325: continue;
1326: fatal("select: %s", strerror(saved_errno));
1327: } else if (result > 0)
1328: after_select(readsetp, writesetp);
1329: }
1330: /* NOTREACHED */
1331: }
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