1 /*
2 * auth.c - PPP authentication and phase control.
3 *
4 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
5 * Use is subject to license terms.
6 *
7 * Copyright (c) 1993 The Australian National University.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms are permitted
11 * provided that the above copyright notice and this paragraph are
12 * duplicated in all such forms and that any documentation,
13 * advertising materials, and other materials related to such
14 * distribution and use acknowledge that the software was developed
15 * by the Australian National University. The name of the University
16 * may not be used to endorse or promote products derived from this
17 * software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
20 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 *
22 * Copyright (c) 1989 Carnegie Mellon University.
23 * All rights reserved.
24 *
25 * Redistribution and use in source and binary forms are permitted
26 * provided that the above copyright notice and this paragraph are
27 * duplicated in all such forms and that any documentation,
28 * advertising materials, and other materials related to such
29 * distribution and use acknowledge that the software was developed
30 * by Carnegie Mellon University. The name of the
31 * University may not be used to endorse or promote products derived
32 * from this software without specific prior written permission.
33 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
34 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
35 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
36 */
37
38 #pragma ident "%Z%%M% %I% %E% SMI"
39 #define RCSID "$Id: auth.c,v 1.65 2000/04/15 01:27:10 masputra Exp $"
40
41 /* Pull in crypt() definition. */
42 #define __EXTENSIONS__
43
44 #include <stdio.h>
45 #include <stddef.h>
46 #include <stdlib.h>
47 #include <unistd.h>
48 #include <pwd.h>
49 #include <grp.h>
50 #include <string.h>
51 #include <sys/types.h>
52 #include <sys/stat.h>
53 #include <sys/socket.h>
54 #include <utmp.h>
55 #include <fcntl.h>
56 #if defined(_PATH_LASTLOG) && (defined(_linux_) || defined(__linux__))
57 #include <lastlog.h>
58 #endif
59
60 #if defined(_linux_) || defined(__linux__)
61 #include <crypt.h>
62 #endif
63
64 #include <netdb.h>
65 #include <netinet/in.h>
66 #include <arpa/inet.h>
67
68 /* Backward compatibility with old Makefiles */
69 #if defined(USE_PAM) && !defined(ALLOW_PAM)
70 #define ALLOW_PAM
71 #endif
72
73 #ifdef ALLOW_PAM
74 #include <security/pam_appl.h>
75 #endif
76
77 #ifdef HAS_SHADOW
78 #include <shadow.h>
79 #ifndef PW_PPP
80 #define PW_PPP PW_LOGIN
81 #endif
82 #endif
83
84 #include "pppd.h"
85 #include "fsm.h"
86 #include "lcp.h"
87 #include "ipcp.h"
88 #include "upap.h"
89 #include "chap.h"
90 #ifdef CBCP_SUPPORT
91 #include "cbcp.h"
92 #endif
93 #include "pathnames.h"
94
95 #if !defined(lint) && !defined(_lint)
96 static const char rcsid[] = RCSID;
97 #endif
98
99 /* Bits in scan_authfile return value */
100 #define NONWILD_SERVER 1
101 #define NONWILD_CLIENT 2
102
103 #define ISWILD(word) (word[0] == '*' && word[1] == '\0')
104
105 /* The name by which the peer authenticated itself to us. */
106 char peer_authname[MAXNAMELEN];
107
108 /* Records which authentication operations haven't completed yet. */
109 static int auth_pending[NUM_PPP];
110
111 /* Set if we have successfully called plogin() */
112 static int logged_in;
113
114 /* List of addresses which the peer may use. */
115 static struct permitted_ip *addresses[NUM_PPP];
116
117 /* Wordlist giving addresses which the peer may use
118 without authenticating itself. */
119 static struct wordlist *noauth_addrs;
120
121 /* Extra options to apply, from the secrets file entry for the peer. */
122 static struct wordlist *extra_options;
123
124 /* Source of those extra options. */
125 static const char *extra_opt_filename;
126 static int extra_opt_line;
127
128 /* Number of network protocols which we have opened. */
129 static int num_np_open;
130
131 /* Number of network protocols which have come up. */
132 static int num_np_up;
133
134 /* Set if we got the contents of passwd[] from the pap-secrets file. */
135 static int passwd_from_file;
136
137 /* Set if we require authentication only because we have a default route. */
138 static bool default_auth;
139
140 /* Hook to enable a plugin to control the idle time limit */
141 int (*idle_time_hook) __P((struct ppp_idle *)) = NULL;
142
143 /* Hook for a plugin to say whether we can possibly authenticate any peer */
144 int (*pap_check_hook) __P((void)) = NULL;
145
146 /* Hook for a plugin to check the PAP user and password */
147 int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
148 struct wordlist **paddrs,
149 struct wordlist **popts)) = NULL;
150
151 /* Hook for a plugin to know about the PAP user logout */
152 void (*pap_logout_hook) __P((void)) = NULL;
153
154 /* Hook for a plugin to get the PAP password for authenticating us */
155 int (*pap_passwd_hook) __P((char *user, char *passwd)) = NULL;
156
157 /*
158 * This is used to ensure that we don't start an auth-up/down
159 * script while one is already running.
160 */
161 enum script_state {
162 s_down,
163 s_up
164 };
165
166 static enum script_state auth_state = s_down;
167 static enum script_state auth_script_state = s_down;
168 static pid_t auth_script_pid = 0;
169
170 /*
171 * This is set by scan_authfile if a client matches, but server doesn't
172 * (possible configuration error).
173 */
174 static char scan_server_match_failed[MAXWORDLEN];
175
176 /*
177 * Option variables.
178 */
179 bool uselogin = 0; /* Use /etc/passwd for checking PAP */
180 bool cryptpap = 0; /* Passwords in pap-secrets are encrypted */
181 bool refuse_pap = 0; /* Don't wanna auth. ourselves with PAP */
182 bool refuse_chap = 0; /* Don't wanna auth. ourselves with CHAP */
183 bool usehostname = 0; /* Use hostname for our_name */
184 bool auth_required = 0; /* Always require authentication from peer */
185 bool allow_any_ip = 0; /* Allow peer to use any IP address */
186 bool explicit_remote = 0; /* User specified explicit remote name */
187 char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
188
189 #ifdef CHAPMS
190 bool refuse_mschap = 0; /* Don't wanna auth. ourself with MS-CHAPv1 */
191 #else
192 bool refuse_mschap = 1; /* Never auth. ourself with MS-CHAPv1 */
193 #endif
194 #ifdef CHAPMSV2
195 bool refuse_mschapv2 = 0; /* Don't wanna auth. ourself with MS-CHAPv2 */
196 #else
197 bool refuse_mschapv2 = 1; /* Never auth. ourself with MS-CHAPv2 */
198 #endif
199
200 #ifdef USE_PAM
201 bool use_pam = 1; /* Enable use of PAM by default */
202 #else
203 bool use_pam = 0; /* Disable use of PAM by default */
204 #endif
205
206 /* Bits in auth_pending[] */
207 #define PAP_WITHPEER 1
208 #define PAP_PEER 2
209 #define CHAP_WITHPEER 4
210 #define CHAP_PEER 8
211
212 /* Prototypes for procedures local to this file. */
213
214 static void network_phase __P((int));
215 static void check_idle __P((void *));
216 static void connect_time_expired __P((void *));
217 static int plogin __P((char *, char *, char **));
218 static void plogout __P((void));
219 static int null_login __P((int));
220 static int get_pap_passwd __P((char *));
221 static int have_pap_secret __P((int *));
222 static int have_chap_secret __P((char *, char *, int, int *));
223 static int ip_addr_check __P((u_int32_t, struct permitted_ip *));
224 static int scan_authfile __P((FILE *, char *, char *, char *,
225 struct wordlist **, struct wordlist **,
226 char *));
227 static void free_wordlist __P((struct wordlist *));
228 static void auth_script __P((char *));
229 static void auth_script_done __P((void *, int));
230 static void set_allowed_addrs __P((int, struct wordlist *, struct wordlist *));
231 static int some_ip_ok __P((struct wordlist *));
232 static int setupapfile __P((char **, option_t *));
233 static int privgroup __P((char **, option_t *));
234 static int set_noauth_addr __P((char **, option_t *));
235 static void check_access __P((FILE *, char *));
236
237 /*
238 * Authentication-related options.
239 */
240 option_t auth_options[] = {
241 { "require-pap", o_bool, &lcp_wantoptions[0].neg_upap,
242 "Require PAP authentication from peer", 1, &auth_required },
243 { "+pap", o_bool, &lcp_wantoptions[0].neg_upap,
244 "Require PAP authentication from peer", 1, &auth_required },
245 { "refuse-pap", o_bool, &refuse_pap,
246 "Don't agree to auth to peer with PAP", 1 },
247 { "-pap", o_bool, &refuse_pap,
248 "Don't allow PAP authentication with peer", 1 },
249 { "require-chap", o_bool, &lcp_wantoptions[0].neg_chap,
250 "Require CHAP authentication from peer", 1, &auth_required },
251 { "+chap", o_bool, &lcp_wantoptions[0].neg_chap,
252 "Require CHAP authentication from peer", 1, &auth_required },
253 { "refuse-chap", o_bool, &refuse_chap,
254 "Don't agree to auth to peer with CHAP", 1 },
255 { "-chap", o_bool, &refuse_chap,
256 "Don't allow CHAP authentication with peer", 1 },
257 { "name", o_string, our_name,
258 "Set local name for authentication",
259 OPT_PRIV|OPT_STATIC, NULL, MAXNAMELEN },
260 { "user", o_string, user,
261 "Set name for auth with peer", OPT_STATIC, NULL, MAXNAMELEN },
262 { "usehostname", o_bool, &usehostname,
263 "Must use hostname for authentication", 1 },
264 { "remotename", o_string, remote_name,
265 "Set remote name for authentication", OPT_STATIC,
266 &explicit_remote, MAXNAMELEN },
267 { "auth", o_bool, &auth_required,
268 "Require authentication from peer", 1 },
269 { "noauth", o_bool, &auth_required,
270 "Don't require peer to authenticate", OPT_PRIV, &allow_any_ip },
271 { "login", o_bool, &uselogin,
272 "Use system password database for PAP", 1 },
273 { "papcrypt", o_bool, &cryptpap,
274 "PAP passwords are encrypted", 1 },
275 { "+ua", o_special, (void *)setupapfile,
276 "Get PAP user and password from file" },
277 { "password", o_string, passwd,
278 "Password for authenticating us to the peer", OPT_STATIC,
279 NULL, MAXSECRETLEN },
280 { "privgroup", o_special, (void *)privgroup,
281 "Allow group members to use privileged options", OPT_PRIV },
282 { "allow-ip", o_special, (void *)set_noauth_addr,
283 "Set peer IP address(es) usable without authentication",
284 OPT_PRIV },
285 #ifdef CHAPMS
286 { "require-mschap", o_bool, &lcp_wantoptions[0].neg_mschap,
287 "Require MS-CHAPv1 authentication from peer", 1, &auth_required },
288 { "refuse-mschap", o_bool, &refuse_mschap,
289 "Don't agree to authenticate to peer with MS-CHAPv1", 1 },
290 #endif
291 #ifdef CHAPMSV2
292 { "require-mschapv2", o_bool, &lcp_wantoptions[0].neg_mschapv2,
293 "Require MS-CHAPv2 authentication from peer", 1, &auth_required },
294 { "refuse-mschapv2", o_bool, &refuse_mschapv2,
295 "Don't agree to authenticate to peer with MS-CHAPv2", 1 },
296 #endif
297 #ifdef ALLOW_PAM
298 { "pam", o_bool, &use_pam,
299 "Enable use of Pluggable Authentication Modules", OPT_PRIV|1 },
300 { "nopam", o_bool, &use_pam,
301 "Disable use of Pluggable Authentication Modules", OPT_PRIV|0 },
302 #endif
303 { NULL }
304 };
305
306 /*
307 * setupapfile - specifies UPAP info for authenticating with peer.
308 */
309 /*ARGSUSED*/
310 static int
setupapfile(argv,opt)311 setupapfile(argv, opt)
312 char **argv;
313 option_t *opt;
314 {
315 FILE * ufile;
316 int l;
317
318 lcp_allowoptions[0].neg_upap = 1;
319
320 /* open user info file */
321 (void) seteuid(getuid());
322 ufile = fopen(*argv, "r");
323 (void) seteuid(0);
324 if (ufile == NULL) {
325 option_error("unable to open user login data file %s", *argv);
326 return 0;
327 }
328 check_access(ufile, *argv);
329
330 /* get username */
331 if (fgets(user, MAXNAMELEN - 1, ufile) == NULL
332 || fgets(passwd, MAXSECRETLEN - 1, ufile) == NULL){
333 option_error("unable to read user login data file %s", *argv);
334 return 0;
335 }
336 (void) fclose(ufile);
337
338 /* get rid of newlines */
339 l = strlen(user);
340 if (l > 0 && user[l-1] == '\n')
341 user[l-1] = '\0';
342 l = strlen(passwd);
343 if (l > 0 && passwd[l-1] == '\n')
344 passwd[l-1] = '\0';
345
346 return (1);
347 }
348
349
350 /*
351 * privgroup - allow members of the group to have privileged access.
352 */
353 /*ARGSUSED*/
354 static int
privgroup(argv,opt)355 privgroup(argv, opt)
356 char **argv;
357 option_t *opt;
358 {
359 struct group *g;
360 int i;
361
362 g = getgrnam(*argv);
363 if (g == NULL) {
364 option_error("group %s is unknown", *argv);
365 return 0;
366 }
367 for (i = 0; i < ngroups; ++i) {
368 if (groups[i] == g->gr_gid) {
369 privileged = 1;
370 break;
371 }
372 }
373 return 1;
374 }
375
376
377 /*
378 * set_noauth_addr - set address(es) that can be used without authentication.
379 * Equivalent to specifying an entry like `"" * "" addr' in pap-secrets.
380 */
381 /*ARGSUSED*/
382 static int
set_noauth_addr(argv,opt)383 set_noauth_addr(argv, opt)
384 char **argv;
385 option_t *opt;
386 {
387 char *addr = *argv;
388 int l = strlen(addr);
389 struct wordlist *wp;
390
391 wp = (struct wordlist *) malloc(sizeof(struct wordlist) + l + 1);
392 if (wp == NULL)
393 novm("allow-ip argument");
394 wp->word = (char *) (wp + 1);
395 wp->next = noauth_addrs;
396 (void) strcpy(wp->word, addr);
397 noauth_addrs = wp;
398 return 1;
399 }
400
401 /*
402 * An Open on LCP has requested a change from Dead to Establish phase.
403 * Do what's necessary to bring the physical layer up.
404 */
405 /*ARGSUSED*/
406 void
link_required(unit)407 link_required(unit)
408 int unit;
409 {
410 }
411
412 /*
413 * LCP has terminated the link; go to the Dead phase and take the
414 * physical layer down.
415 */
416 /*ARGSUSED*/
417 void
link_terminated(unit)418 link_terminated(unit)
419 int unit;
420 {
421 const char *pn1, *pn2;
422
423 if (phase == PHASE_DEAD)
424 return;
425 if (pap_logout_hook != NULL) {
426 (*pap_logout_hook)();
427 } else {
428 if (logged_in)
429 plogout();
430 }
431 new_phase(PHASE_DEAD);
432 if (peer_nak_auth) {
433 if ((pn1 = protocol_name(nak_auth_orig)) == NULL)
434 pn1 = "?";
435 if ((pn2 = protocol_name(nak_auth_proto)) == NULL)
436 pn2 = "?";
437 warn("Peer sent Configure-Nak for 0x%x (%s) to suggest 0x%x (%s)",
438 nak_auth_orig, pn1, nak_auth_proto, pn2);
439 }
440 if (unsolicited_nak_auth) {
441 if ((pn1 = protocol_name(unsolicit_auth_proto)) == NULL)
442 pn1 = "?";
443 warn("Peer unexpectedly asked us to authenticate with 0x%x (%s)",
444 unsolicit_auth_proto, pn1);
445 }
446 if (peer_reject_auth) {
447 if ((pn1 = protocol_name(reject_auth_proto)) == NULL)
448 pn1 = "?";
449 warn("Peer rejected our demand for 0x%x (%s)",
450 reject_auth_proto, pn1);
451 }
452 if (naked_peers_auth) {
453 if ((pn1 = protocol_name(naked_auth_orig)) == NULL)
454 pn1 = "?";
455 if ((pn2 = protocol_name(naked_auth_proto)) == NULL)
456 pn2 = "?";
457 warn("We set Configure-Nak for 0x%x (%s) to suggest 0x%x (%s)",
458 naked_auth_orig, pn1, naked_auth_proto, pn2);
459 }
460 if (rejected_peers_auth) {
461 if ((pn1 = protocol_name(rejected_auth_proto)) == NULL)
462 pn1 = "?";
463 warn("We rejected the peer's demand for 0x%x (%s)",
464 rejected_auth_proto, pn1);
465 }
466
467 peer_nak_auth = unsolicited_nak_auth = peer_reject_auth =
468 rejected_peers_auth = naked_peers_auth = 0;
469 nak_auth_proto = nak_auth_orig = unsolicit_auth_proto = reject_auth_proto =
470 rejected_auth_proto = naked_auth_orig = naked_auth_proto = 0;
471 notice("Connection terminated.");
472 }
473
474 /*
475 * LCP has gone down; it will either die or try to re-establish.
476 */
477 void
link_down(unit)478 link_down(unit)
479 int unit;
480 {
481 int i;
482 struct protent *protp;
483
484 auth_state = s_down;
485 if (auth_script_state == s_up && auth_script_pid == 0) {
486 update_link_stats(unit);
487 auth_script_state = s_down;
488 auth_script(_PATH_AUTHDOWN);
489 }
490 for (i = 0; (protp = protocols[i]) != NULL; ++i) {
491 if (!protp->enabled_flag)
492 continue;
493 if (protp->protocol != PPP_LCP && protp->lowerdown != NULL)
494 (*protp->lowerdown)(unit);
495 if (protp->protocol < 0xC000 && protp->close != NULL)
496 (*protp->close)(unit, "LCP down");
497 }
498 num_np_open = 0;
499 num_np_up = 0;
500 if (phase != PHASE_DEAD)
501 new_phase(PHASE_TERMINATE);
502 }
503
504 /*
505 * The link is established.
506 * Proceed to the Dead, Authenticate or Network phase as appropriate.
507 */
508 void
link_established(unit)509 link_established(unit)
510 int unit;
511 {
512 int auth;
513 lcp_options *wo = &lcp_wantoptions[unit];
514 lcp_options *go = &lcp_gotoptions[unit];
515 lcp_options *ho = &lcp_hisoptions[unit];
516 int i;
517 struct protent *protp;
518
519 /*
520 * Tell higher-level protocols that LCP is up.
521 */
522 for (i = 0; (protp = protocols[i]) != NULL; ++i)
523 if (protp->protocol != PPP_LCP && protp->enabled_flag
524 && protp->lowerup != NULL)
525 (*protp->lowerup)(unit);
526
527 if (auth_required && !(go->neg_chap || go->neg_mschap ||
528 go->neg_mschapv2 || go->neg_upap)) {
529 /*
530 * We wanted the peer to authenticate itself, and it refused:
531 * if we have some address(es) it can use without auth, fine,
532 * otherwise treat it as though it authenticated with PAP using
533 * a username * of "" and a password of "". If that's not OK,
534 * boot it out.
535 */
536 if (noauth_addrs != NULL) {
537 set_allowed_addrs(unit, noauth_addrs, NULL);
538 } else if (!wo->neg_upap || !null_login(unit)) {
539 warn("peer refused to authenticate: terminating link");
540 lcp_close(unit, "peer refused to authenticate");
541 status = EXIT_PEER_AUTH_FAILED;
542 return;
543 }
544 }
545
546 new_phase(PHASE_AUTHENTICATE);
547 auth = 0;
548 if (go->neg_chap || go->neg_mschap || go->neg_mschapv2) {
549 if (go->neg_chap) {
550 if (debug)
551 dbglog("Authenticating peer with standard CHAP");
552 go->chap_mdtype = CHAP_DIGEST_MD5;
553 } else if (go->neg_mschap) {
554 if (debug)
555 dbglog("Authenticating peer with MS-CHAPv1");
556 go->chap_mdtype = CHAP_MICROSOFT;
557 } else {
558 if (debug)
559 dbglog("Authenticating peer with MS-CHAPv2");
560 go->chap_mdtype = CHAP_MICROSOFT_V2;
561 }
562 ChapAuthPeer(unit, our_name, go->chap_mdtype);
563 auth |= CHAP_PEER;
564 } else if (go->neg_upap) {
565 if (debug)
566 dbglog("Authenticating peer with PAP");
567 upap_authpeer(unit);
568 auth |= PAP_PEER;
569 }
570 if (ho->neg_chap || ho->neg_mschap || ho->neg_mschapv2) {
571 switch (ho->chap_mdtype) {
572 case CHAP_DIGEST_MD5:
573 if (debug)
574 dbglog("Authenticating to peer with standard CHAP");
575 break;
576 case CHAP_MICROSOFT:
577 if (debug)
578 dbglog("Authenticating to peer with MS-CHAPv1");
579 break;
580 case CHAP_MICROSOFT_V2:
581 if (debug)
582 dbglog("Authenticating to peer with MS-CHAPv2");
583 break;
584 default:
585 if (debug)
586 dbglog("Authenticating to peer with CHAP 0x%x", ho->chap_mdtype);
587 break;
588 }
589 ChapAuthWithPeer(unit, user, ho->chap_mdtype);
590 auth |= CHAP_WITHPEER;
591 } else if (ho->neg_upap) {
592 if (passwd[0] == '\0') {
593 passwd_from_file = 1;
594 if (!get_pap_passwd(passwd))
595 error("No secret found for PAP login");
596 }
597 if (debug)
598 dbglog("Authenticating to peer with PAP");
599 upap_authwithpeer(unit, user, passwd);
600 auth |= PAP_WITHPEER;
601 }
602 auth_pending[unit] = auth;
603
604 if (!auth)
605 network_phase(unit);
606 }
607
608 /*
609 * Proceed to the network phase.
610 */
611 static void
network_phase(unit)612 network_phase(unit)
613 int unit;
614 {
615 lcp_options *go = &lcp_gotoptions[unit];
616
617 /*
618 * If the peer had to authenticate, run the auth-up script now.
619 */
620 if (go->neg_chap || go->neg_mschap || go->neg_mschapv2 || go->neg_upap) {
621 auth_state = s_up;
622 if (auth_script_state == s_down && auth_script_pid == 0) {
623 auth_script_state = s_up;
624 auth_script(_PATH_AUTHUP);
625 }
626 }
627
628 /*
629 * Process extra options from the secrets file
630 */
631 if (extra_options != NULL) {
632 option_source = (char *)extra_opt_filename;
633 option_line = extra_opt_line;
634 (void) options_from_list(extra_options, 1);
635 free_wordlist(extra_options);
636 extra_options = NULL;
637 }
638
639 #ifdef CBCP_SUPPORT
640 /*
641 * If we negotiated callback, do it now.
642 */
643 if (go->neg_cbcp) {
644 new_phase(PHASE_CALLBACK);
645 (*cbcp_protent.open)(unit);
646 return;
647 }
648 #endif
649
650 start_networks();
651 }
652
653 void
start_networks()654 start_networks()
655 {
656 int i;
657 struct protent *protp;
658
659 new_phase(PHASE_NETWORK);
660
661 #ifdef HAVE_MULTILINK
662 if (multilink) {
663 if (mp_join_bundle()) {
664 if (updetach && !nodetach)
665 detach();
666 return;
667 }
668 }
669 #endif /* HAVE_MULTILINK */
670
671 #if 0
672 if (!demand)
673 set_filters(&pass_filter, &active_filter);
674 #endif
675 for (i = 0; (protp = protocols[i]) != NULL; ++i)
676 if (protp->protocol < 0xC000 && protp->enabled_flag
677 && protp->open != NULL) {
678 (*protp->open)(0);
679 if (protp->protocol != PPP_CCP)
680 ++num_np_open;
681 }
682
683 if (num_np_open == 0)
684 /* nothing to do */
685 lcp_close(0, "No network protocols running");
686 }
687
688 /*
689 * The peer has failed to authenticate himself using `protocol'.
690 */
691 /*ARGSUSED*/
692 void
auth_peer_fail(unit,protocol)693 auth_peer_fail(unit, protocol)
694 int unit, protocol;
695 {
696 /*
697 * Authentication failure: take the link down
698 */
699 lcp_close(unit, "Authentication failed");
700 status = EXIT_PEER_AUTH_FAILED;
701 }
702
703 /*
704 * The peer has been successfully authenticated using `protocol'.
705 */
706 void
auth_peer_success(unit,protocol,name,namelen)707 auth_peer_success(unit, protocol, name, namelen)
708 int unit, protocol;
709 char *name;
710 int namelen;
711 {
712 int bit;
713
714 switch (protocol) {
715 case PPP_CHAP:
716 bit = CHAP_PEER;
717 break;
718 case PPP_PAP:
719 bit = PAP_PEER;
720 break;
721 default:
722 warn("auth_peer_success: unknown protocol %x", protocol);
723 return;
724 }
725
726 /*
727 * Save the authenticated name of the peer for later.
728 */
729 if (namelen > sizeof(peer_authname) - 1)
730 namelen = sizeof(peer_authname) - 1;
731 BCOPY(name, peer_authname, namelen);
732 peer_authname[namelen] = '\0';
733 script_setenv("PEERNAME", peer_authname, 0);
734
735 /*
736 * If there is no more authentication still to be done,
737 * proceed to the network (or callback) phase.
738 */
739 if ((auth_pending[unit] &= ~bit) == 0)
740 network_phase(unit);
741 }
742
743 /*
744 * We have failed to authenticate ourselves to the peer using `protocol'.
745 */
746 /*ARGSUSED*/
747 void
auth_withpeer_fail(unit,protocol)748 auth_withpeer_fail(unit, protocol)
749 int unit, protocol;
750 {
751 if (passwd_from_file)
752 BZERO(passwd, MAXSECRETLEN);
753 /*
754 * We've failed to authenticate ourselves to our peer.
755 * Some servers keep sending CHAP challenges, but there
756 * is no point in persisting without any way to get updated
757 * authentication secrets.
758 */
759 lcp_close(unit, "Failed to authenticate ourselves to peer");
760 status = EXIT_AUTH_TOPEER_FAILED;
761 }
762
763 /*
764 * We have successfully authenticated ourselves with the peer using `protocol'.
765 */
766 void
auth_withpeer_success(unit,protocol)767 auth_withpeer_success(unit, protocol)
768 int unit, protocol;
769 {
770 int bit;
771
772 switch (protocol) {
773 case PPP_CHAP:
774 bit = CHAP_WITHPEER;
775 break;
776 case PPP_PAP:
777 if (passwd_from_file)
778 BZERO(passwd, MAXSECRETLEN);
779 bit = PAP_WITHPEER;
780 break;
781 default:
782 warn("auth_withpeer_success: unknown protocol %x", protocol);
783 bit = 0;
784 }
785
786 /*
787 * If there is no more authentication still being done,
788 * proceed to the network (or callback) phase.
789 */
790 if ((auth_pending[unit] &= ~bit) == 0)
791 network_phase(unit);
792 }
793
794
795 /*
796 * np_up - a network protocol has come up.
797 */
798 /*ARGSUSED*/
799 void
np_up(unit,proto)800 np_up(unit, proto)
801 int unit, proto;
802 {
803 int tlim;
804
805 if (num_np_up == 0) {
806 /*
807 * At this point we consider that the link has come up successfully.
808 */
809 status = EXIT_OK;
810 unsuccess = 0;
811
812 peer_nak_auth = unsolicited_nak_auth = peer_reject_auth =
813 rejected_peers_auth = naked_peers_auth = 0;
814 nak_auth_proto = nak_auth_orig = unsolicit_auth_proto =
815 reject_auth_proto = rejected_auth_proto = naked_auth_orig =
816 naked_auth_proto = 0;
817
818 new_phase(PHASE_RUNNING);
819
820 if (idle_time_hook != NULL)
821 tlim = (*idle_time_hook)(NULL);
822 else
823 tlim = idle_time_limit;
824 if (tlim > 0)
825 TIMEOUT(check_idle, NULL, tlim);
826
827 /*
828 * Set a timeout to close the connection once the maximum
829 * connect time has expired.
830 */
831 if (maxconnect > 0) {
832 TIMEOUT(connect_time_expired, &lcp_fsm[unit], maxconnect);
833
834 /*
835 * Tell LCP to send Time-Remaining packets. One should be
836 * sent out now, at maxconnect-300, at maxconnect-120, and
837 * again at maxconnect-30.
838 */
839 lcp_settimeremaining(unit, maxconnect, maxconnect);
840 if (maxconnect > 300)
841 lcp_settimeremaining(unit, maxconnect, 300);
842 if (maxconnect > 120)
843 lcp_settimeremaining(unit, maxconnect, 120);
844 if (maxconnect > 30)
845 lcp_settimeremaining(unit, maxconnect, 30);
846 }
847
848 /*
849 * Detach now, if the updetach option was given.
850 */
851 if (updetach && !nodetach)
852 detach();
853 }
854 ++num_np_up;
855 }
856
857 /*
858 * np_down - a network protocol has gone down.
859 */
860 /*ARGSUSED*/
861 void
np_down(unit,proto)862 np_down(unit, proto)
863 int unit, proto;
864 {
865 if (--num_np_up == 0) {
866 UNTIMEOUT(check_idle, NULL);
867 new_phase(PHASE_NETWORK);
868 }
869 }
870
871 /*
872 * np_finished - a network protocol has finished using the link.
873 */
874 /*ARGSUSED*/
875 void
np_finished(unit,proto)876 np_finished(unit, proto)
877 int unit, proto;
878 {
879 if (--num_np_open <= 0) {
880 /* no further use for the link: shut up shop. */
881 lcp_close(0, "No network protocols running");
882 }
883 }
884
885 /*
886 * check_idle - check whether the link has been idle for long
887 * enough that we can shut it down.
888 */
889 /*ARGSUSED*/
890 static void
check_idle(arg)891 check_idle(arg)
892 void *arg;
893 {
894 struct ppp_idle idle;
895 time_t itime;
896 int tlim;
897
898 if (!get_idle_time(0, &idle))
899 return;
900 if (idle_time_hook != NULL) {
901 tlim = (*idle_time_hook)(&idle);
902 } else {
903 itime = MIN(idle.xmit_idle, idle.recv_idle);
904 tlim = idle_time_limit - itime;
905 }
906 if (tlim <= 0) {
907 /* link is idle: shut it down. */
908 notice("Terminating connection due to lack of activity.");
909 lcp_close(0, "Link inactive");
910 need_holdoff = 0;
911 status = EXIT_IDLE_TIMEOUT;
912 } else {
913 TIMEOUT(check_idle, NULL, tlim);
914 }
915 }
916
917 /*
918 * connect_time_expired - log a message and close the connection.
919 */
920 /*ARGSUSED*/
921 static void
connect_time_expired(arg)922 connect_time_expired(arg)
923 void *arg;
924 {
925 fsm *f = (fsm *)arg;
926
927 info("Connect time expired");
928 lcp_close(f->unit, "Connect time expired"); /* Close connection */
929 status = EXIT_CONNECT_TIME;
930 }
931
932 /*
933 * auth_check_options - called to check authentication options.
934 */
935 void
auth_check_options()936 auth_check_options()
937 {
938 lcp_options *wo = &lcp_wantoptions[0];
939 int can_auth;
940 int lacks_ip;
941
942 /* Default our_name to hostname, and user to our_name */
943 if (our_name[0] == '\0' || usehostname)
944 (void) strlcpy(our_name, hostname, sizeof(our_name));
945 if (user[0] == '\0')
946 (void) strlcpy(user, our_name, sizeof(user));
947
948 /*
949 * If we have a default route, require the peer to authenticate
950 * unless the noauth option was given or the real user is root.
951 */
952 if (!auth_required && !allow_any_ip && have_route_to(0) && !privileged) {
953 auth_required = 1;
954 default_auth = 1;
955 }
956
957 /* If authentication is required, ask peer for CHAP or PAP. */
958 if (auth_required) {
959 if (!wo->neg_chap && !wo->neg_mschap && !wo->neg_mschapv2 &&
960 !wo->neg_upap) {
961 wo->neg_chap = 1;
962 #ifdef CHAPMS
963 wo->neg_mschap = 1;
964 #endif
965 #ifdef CHAPMSV2
966 wo->neg_mschapv2 = 1;
967 #endif
968 wo->chap_mdtype = CHAP_DIGEST_MD5;
969 wo->neg_upap = 1;
970 }
971 } else {
972 wo->neg_chap = 0;
973 wo->neg_mschap = 0;
974 wo->neg_mschapv2 = 0;
975 wo->neg_upap = 0;
976 }
977
978 /*
979 * Check whether we have appropriate secrets to use
980 * to authenticate the peer.
981 */
982 lacks_ip = 0;
983 can_auth = wo->neg_upap && (uselogin || have_pap_secret(&lacks_ip));
984 if (!can_auth && (wo->neg_chap || wo->neg_mschap || wo->neg_mschapv2)) {
985 can_auth = have_chap_secret((explicit_remote? remote_name: NULL),
986 our_name, 1, &lacks_ip);
987 }
988
989 if (auth_required && !can_auth && noauth_addrs == NULL) {
990 if (default_auth) {
991 option_error(
992 "By default the remote system is required to authenticate itself");
993 option_error(
994 "(because this system has a default route to the Internet)");
995 } else if (explicit_remote)
996 option_error(
997 "The remote system (%s) is required to authenticate itself",
998 remote_name);
999 else
1000 option_error(
1001 "The remote system is required to authenticate itself");
1002 option_error(
1003 "but I couldn't find any suitable secret (password) for it to use to do so.");
1004 if (lacks_ip)
1005 option_error(
1006 "(None of the available passwords would let it use an IP address.)");
1007
1008 exit(1);
1009 }
1010 }
1011
1012 /*
1013 * auth_reset - called when LCP is starting negotiations to recheck
1014 * authentication options, i.e. whether we have appropriate secrets
1015 * to use for authenticating ourselves and/or the peer.
1016 */
1017 void
auth_reset(unit)1018 auth_reset(unit)
1019 int unit;
1020 {
1021 lcp_options *go = &lcp_gotoptions[unit];
1022 lcp_options *ao = &lcp_allowoptions[unit];
1023 int havesecret;
1024
1025 ao->neg_upap = !refuse_pap && (passwd[0] != '\0' || get_pap_passwd(NULL));
1026
1027 havesecret = passwd[0] != '\0' ||
1028 have_chap_secret(user, (explicit_remote? remote_name: NULL), 0, NULL);
1029 ao->neg_chap = !refuse_chap && havesecret;
1030 ao->neg_mschap = !refuse_mschap && havesecret;
1031 ao->neg_mschapv2 = !refuse_mschapv2 && havesecret;
1032 if (ao->neg_chap)
1033 ao->chap_mdtype = CHAP_DIGEST_MD5;
1034 else if (ao->neg_mschap)
1035 ao->chap_mdtype = CHAP_MICROSOFT;
1036 else
1037 ao->chap_mdtype = CHAP_MICROSOFT_V2;
1038
1039 if (go->neg_upap && !uselogin && !have_pap_secret(NULL))
1040 go->neg_upap = 0;
1041 if (go->neg_chap || go->neg_mschap || go->neg_mschapv2) {
1042 havesecret = have_chap_secret((explicit_remote? remote_name: NULL),
1043 our_name, 1, NULL);
1044 if (!havesecret)
1045 go->neg_chap = go->neg_mschap = go->neg_mschapv2 = 0;
1046 else if (go->neg_chap)
1047 go->chap_mdtype = CHAP_DIGEST_MD5;
1048 else if (go->neg_mschap)
1049 go->chap_mdtype = CHAP_MICROSOFT;
1050 else
1051 go->chap_mdtype = CHAP_MICROSOFT_V2;
1052 }
1053 }
1054
1055
1056 /*
1057 * check_passwd - Check the user name and passwd against the PAP secrets
1058 * file. If requested, also check against the system password database,
1059 * and login the user if OK.
1060 *
1061 * returns:
1062 * UPAP_AUTHNAK: Authentication failed.
1063 * UPAP_AUTHACK: Authentication succeeded.
1064 * In either case, msg points to an appropriate message.
1065 */
1066 int
check_passwd(unit,auser,userlen,apasswd,passwdlen,msg)1067 check_passwd(unit, auser, userlen, apasswd, passwdlen, msg)
1068 int unit;
1069 char *auser;
1070 int userlen;
1071 char *apasswd;
1072 int passwdlen;
1073 char **msg;
1074 {
1075 int ret;
1076 char *filename;
1077 FILE *f;
1078 struct wordlist *addrs = NULL, *opts = NULL;
1079 char passwd[256], user[256];
1080 char secret[MAXWORDLEN];
1081 static int attempts = 0;
1082
1083 /*
1084 * Make copies of apasswd and auser, then null-terminate them.
1085 * If there are unprintable characters in the password, make
1086 * them visible.
1087 */
1088 (void) slprintf(passwd, sizeof(passwd), "%.*v", passwdlen, apasswd);
1089 (void) slprintf(user, sizeof(user), "%.*v", userlen, auser);
1090 *msg = "";
1091
1092 /*
1093 * Check if a plugin wants to handle this.
1094 */
1095 if (pap_auth_hook != NULL) {
1096 /* Set a default and allow the plug-in to change it. */
1097 extra_opt_filename = "plugin";
1098 extra_opt_line = 0;
1099 ret = (*pap_auth_hook)(user, passwd, msg, &addrs, &opts);
1100 if (ret >= 0) {
1101 if (ret > 0)
1102 set_allowed_addrs(unit, addrs, opts);
1103 BZERO(passwd, sizeof(passwd));
1104 if (addrs != NULL)
1105 free_wordlist(addrs);
1106 return ret? UPAP_AUTHACK: UPAP_AUTHNAK;
1107 }
1108 }
1109
1110 /*
1111 * Open the file of pap secrets and scan for a suitable secret
1112 * for authenticating this user.
1113 */
1114 filename = _PATH_UPAPFILE;
1115 addrs = opts = NULL;
1116 ret = UPAP_AUTHNAK;
1117 f = fopen(filename, "r");
1118 if (f == NULL) {
1119 error("Can't open PAP password file %s: %m", filename);
1120
1121 } else {
1122 check_access(f, filename);
1123 if (scan_authfile(f, user, our_name, secret, &addrs, &opts, filename) < 0) {
1124 warn("no PAP secret found for %s", user);
1125 if (scan_server_match_failed[0] != '\0')
1126 warn("possible configuration error: local name is %q, but "
1127 "found %q instead", our_name, scan_server_match_failed);
1128 } else if (secret[0] != '\0') {
1129 /* password given in pap-secrets - must match */
1130 if ((!cryptpap && strcmp(passwd, secret) == 0)
1131 || strcmp(crypt(passwd, secret), secret) == 0)
1132 ret = UPAP_AUTHACK;
1133 else
1134 warn("PAP authentication failure for %s", user);
1135 } else if (uselogin) {
1136 /* empty password in pap-secrets and login option */
1137 ret = plogin(user, passwd, msg);
1138 if (ret == UPAP_AUTHNAK)
1139 warn("PAP login failure for %s", user);
1140 } else {
1141 /* empty password in pap-secrets and login option not used */
1142 ret = UPAP_AUTHACK;
1143 }
1144 (void) fclose(f);
1145 }
1146
1147 if (ret == UPAP_AUTHNAK) {
1148 if (**msg == '\0')
1149 *msg = "Login incorrect";
1150 /*
1151 * Frustrate passwd stealer programs.
1152 * Allow 10 tries, but start backing off after 3 (stolen from login).
1153 * On 10'th, drop the connection.
1154 */
1155 if (attempts++ >= 10) {
1156 warn("%d LOGIN FAILURES ON %s, %s", attempts, devnam, user);
1157 lcp_close(unit, "login failed");
1158 }
1159 if (attempts > 3)
1160 (void) sleep((u_int) (attempts - 3) * 5);
1161 if (opts != NULL)
1162 free_wordlist(opts);
1163
1164 } else {
1165 attempts = 0; /* Reset count */
1166 if (**msg == '\0')
1167 *msg = "Login ok";
1168 set_allowed_addrs(unit, addrs, opts);
1169 }
1170
1171 if (addrs != NULL)
1172 free_wordlist(addrs);
1173 BZERO(passwd, sizeof(passwd));
1174 BZERO(secret, sizeof(secret));
1175
1176 return ret;
1177 }
1178
1179 /*
1180 * This function is needed for PAM.
1181 */
1182
1183 #ifdef ALLOW_PAM
1184 /* Static variables used to communicate between the conversation function
1185 * and the server_login function
1186 */
1187 static char *PAM_username;
1188 static char *PAM_password;
1189 static int PAM_error = 0;
1190 static pam_handle_t *pamh = NULL;
1191
1192 /* PAM conversation function
1193 * Here we assume (for now, at least) that echo on means login name, and
1194 * echo off means password.
1195 */
1196
1197 /*ARGSUSED*/
PAM_conv(int num_msg,const struct pam_message ** msg,struct pam_response ** resp,void * appdata_ptr)1198 static int PAM_conv (int num_msg,
1199 #ifndef SOL2
1200 const
1201 #endif
1202 struct pam_message **msg, struct pam_response **resp, void *appdata_ptr)
1203 {
1204 int replies = 0;
1205 struct pam_response *reply = NULL;
1206
1207 #define COPY_STRING(s) (s) ? strdup(s) : NULL
1208
1209 reply = malloc(sizeof(struct pam_response) * num_msg);
1210 if (reply == NULL)
1211 return PAM_CONV_ERR;
1212
1213 for (replies = 0; replies < num_msg; replies++) {
1214 switch (msg[replies]->msg_style) {
1215 case PAM_PROMPT_ECHO_ON:
1216 reply[replies].resp_retcode = PAM_SUCCESS;
1217 reply[replies].resp = COPY_STRING(PAM_username);
1218 /* PAM frees resp */
1219 break;
1220 case PAM_PROMPT_ECHO_OFF:
1221 reply[replies].resp_retcode = PAM_SUCCESS;
1222 reply[replies].resp = COPY_STRING(PAM_password);
1223 /* PAM frees resp */
1224 break;
1225 case PAM_TEXT_INFO:
1226 /* fall through */
1227 case PAM_ERROR_MSG:
1228 /* ignore it, but pam still wants a NULL response... */
1229 reply[replies].resp_retcode = PAM_SUCCESS;
1230 reply[replies].resp = NULL;
1231 break;
1232 default:
1233 /* Must be an error of some sort... */
1234 free (reply);
1235 PAM_error = 1;
1236 return PAM_CONV_ERR;
1237 }
1238 }
1239 *resp = reply;
1240 return PAM_SUCCESS;
1241 }
1242
1243 static struct pam_conv PAM_conversation = {
1244 PAM_conv, NULL
1245 };
1246 #endif /* ALLOW_PAM */
1247
1248 /*
1249 * plogin - Check the user name and password against the system
1250 * password database, and login the user if OK.
1251 *
1252 * returns:
1253 * UPAP_AUTHNAK: Login failed.
1254 * UPAP_AUTHACK: Login succeeded.
1255 * In either case, msg points to an appropriate message.
1256 */
1257
1258 static int
plogin(user,passwd,msg)1259 plogin(user, passwd, msg)
1260 char *user;
1261 char *passwd;
1262 char **msg;
1263 {
1264 char *tty;
1265 #ifdef HAS_SHADOW
1266 struct spwd *spwd;
1267 #endif
1268 struct passwd *pw = NULL;
1269
1270 #ifdef ALLOW_PAM
1271 int pam_error;
1272
1273 if (use_pam) {
1274 if (debug)
1275 dbglog("using PAM for user authentication");
1276 pam_error = pam_start ("ppp", user, &PAM_conversation, &pamh);
1277 if (pam_error != PAM_SUCCESS) {
1278 *msg = (char *) pam_strerror (pamh, pam_error);
1279 reopen_log();
1280 return UPAP_AUTHNAK;
1281 }
1282 /*
1283 * Define the fields for the credential validation
1284 */
1285
1286 PAM_username = user;
1287 PAM_password = passwd;
1288 PAM_error = 0;
1289 /* this might be useful to some modules; required for Solaris */
1290 tty = devnam;
1291 if (*tty == '\0')
1292 tty = ppp_devnam;
1293 (void) pam_set_item(pamh, PAM_TTY, tty);
1294 #ifdef PAM_RHOST
1295 (void) pam_set_item(pamh, PAM_RHOST, "");
1296 #endif
1297
1298 /*
1299 * Validate the user
1300 */
1301 pam_error = pam_authenticate (pamh, PAM_SILENT);
1302 if (pam_error == PAM_SUCCESS && !PAM_error) {
1303 pam_error = pam_acct_mgmt (pamh, PAM_SILENT);
1304 if (pam_error == PAM_SUCCESS)
1305 (void) pam_open_session (pamh, PAM_SILENT);
1306 }
1307
1308 *msg = (char *) pam_strerror (pamh, pam_error);
1309
1310 /*
1311 * Clean up the mess
1312 */
1313 reopen_log(); /* apparently the PAM stuff does closelog() */
1314 PAM_username = NULL;
1315 PAM_password = NULL;
1316 if (pam_error != PAM_SUCCESS)
1317 return UPAP_AUTHNAK;
1318 } else
1319 #endif /* ALLOW_PAM */
1320
1321 {
1322 if (debug) {
1323 #ifdef HAS_SHADOW
1324 dbglog("using passwd/shadow for user authentication");
1325 #else
1326 dbglog("using passwd for user authentication");
1327 #endif
1328 }
1329 /*
1330 * Use the non-PAM methods directly
1331 */
1332
1333 pw = getpwnam(user);
1334
1335 endpwent();
1336 if (pw == NULL)
1337 return (UPAP_AUTHNAK);
1338
1339 #ifdef HAS_SHADOW
1340 spwd = getspnam(user);
1341 endspent();
1342 if (spwd != NULL) {
1343 /* check the age of the password entry */
1344 long now = time(NULL) / 86400L;
1345
1346 if ((spwd->sp_expire > 0 && now >= spwd->sp_expire)
1347 || ((spwd->sp_max >= 0 && spwd->sp_max < 10000)
1348 && spwd->sp_lstchg >= 0
1349 && now >= spwd->sp_lstchg + spwd->sp_max)) {
1350 warn("Password for %s has expired", user);
1351 return (UPAP_AUTHNAK);
1352 }
1353 pw->pw_passwd = spwd->sp_pwdp;
1354 }
1355 #endif
1356
1357 /*
1358 * If no passwd, don't let them login.
1359 */
1360 if (pw->pw_passwd == NULL || strlen(pw->pw_passwd) < 2 ||
1361 strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd) != 0)
1362 return (UPAP_AUTHNAK);
1363 }
1364
1365 /*
1366 * Write a wtmp entry for this user.
1367 */
1368
1369 tty = devnam;
1370 if (strncmp(tty, "/dev/", 5) == 0)
1371 tty += 5;
1372 logwtmp(tty, user, remote_name); /* Add wtmp login entry */
1373
1374 #ifdef _PATH_LASTLOG
1375 if (!use_pam && pw != (struct passwd *)NULL) {
1376 struct lastlog ll;
1377 int fd;
1378
1379 if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
1380 (void)lseek(fd, (off_t)(pw->pw_uid * sizeof(ll)), SEEK_SET);
1381 BZERO((void *)&ll, sizeof(ll));
1382 (void)time(&ll.ll_time);
1383 (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
1384 (void)write(fd, (char *)&ll, sizeof(ll));
1385 (void)close(fd);
1386 }
1387 }
1388 #endif /* _PATH_LASTLOG */
1389
1390 info("user %s logged in", user);
1391 logged_in = 1;
1392
1393 return (UPAP_AUTHACK);
1394 }
1395
1396 /*
1397 * plogout - Logout the user.
1398 */
1399 static void
plogout()1400 plogout()
1401 {
1402 char *tty;
1403
1404 #ifdef ALLOW_PAM
1405 int pam_error;
1406
1407 if (use_pam) {
1408 if (pamh != NULL) {
1409 pam_error = pam_close_session (pamh, PAM_SILENT);
1410 (void) pam_end (pamh, pam_error);
1411 pamh = NULL;
1412 }
1413 /* Apparently the pam stuff does closelog(). */
1414 reopen_log();
1415 } else
1416 #endif /* ALLOW_PAM */
1417
1418 {
1419 tty = devnam;
1420 if (strncmp(tty, "/dev/", 5) == 0)
1421 tty += 5;
1422 /* Wipe out utmp logout entry */
1423 logwtmp(tty, "", "");
1424 }
1425 logged_in = 0;
1426 }
1427
1428
1429 /*
1430 * null_login - Check if a username of "" and a password of "" are
1431 * acceptable, and iff so, set the list of acceptable IP addresses
1432 * and return 1.
1433 */
1434 static int
null_login(unit)1435 null_login(unit)
1436 int unit;
1437 {
1438 char *filename;
1439 FILE *f;
1440 int i, ret;
1441 struct wordlist *addrs, *opts;
1442 char secret[MAXWORDLEN];
1443
1444 /*
1445 * Open the file of pap secrets and scan for a suitable secret.
1446 */
1447 filename = _PATH_UPAPFILE;
1448 addrs = NULL;
1449 f = fopen(filename, "r");
1450 if (f == NULL)
1451 return 0;
1452 check_access(f, filename);
1453
1454 i = scan_authfile(f, "", our_name, secret, &addrs, &opts, filename);
1455 ret = i >= 0 && secret[0] == '\0';
1456 BZERO(secret, sizeof(secret));
1457
1458 if (ret)
1459 set_allowed_addrs(unit, addrs, opts);
1460 else if (opts != NULL)
1461 free_wordlist(opts);
1462 if (addrs != NULL)
1463 free_wordlist(addrs);
1464
1465 (void) fclose(f);
1466 return ret;
1467 }
1468
1469
1470 /*
1471 * get_pap_passwd - get a password for authenticating ourselves with
1472 * our peer using PAP. Returns 1 on success, 0 if no suitable password
1473 * could be found.
1474 * Assumes passwd points to MAXSECRETLEN bytes of space (if non-null).
1475 */
1476 static int
get_pap_passwd(passwd)1477 get_pap_passwd(passwd)
1478 char *passwd;
1479 {
1480 char *filename;
1481 FILE *f;
1482 int ret;
1483 char secret[MAXWORDLEN];
1484
1485 /*
1486 * Check whether a plugin wants to supply this.
1487 */
1488 if (pap_passwd_hook != NULL) {
1489 ret = (*pap_passwd_hook)(user, passwd);
1490 if (ret >= 0)
1491 return ret;
1492 }
1493
1494 filename = _PATH_UPAPFILE;
1495 f = fopen(filename, "r");
1496 if (f == NULL)
1497 return 0;
1498 check_access(f, filename);
1499 ret = scan_authfile(f, user,
1500 (remote_name[0] != '\0' ? remote_name: NULL),
1501 secret, NULL, NULL, filename);
1502 (void) fclose(f);
1503 if (ret < 0)
1504 return 0;
1505 if (passwd != NULL)
1506 (void) strlcpy(passwd, secret, MAXSECRETLEN);
1507 BZERO(secret, sizeof(secret));
1508 return 1;
1509 }
1510
1511
1512 /*
1513 * have_pap_secret - check whether we have a PAP file with any
1514 * secrets that we could possibly use for authenticating the peer.
1515 */
1516 static int
have_pap_secret(lacks_ipp)1517 have_pap_secret(lacks_ipp)
1518 int *lacks_ipp;
1519 {
1520 FILE *f;
1521 int ret;
1522 char *filename;
1523 struct wordlist *addrs;
1524
1525 /* let the plugin decide, if there is one */
1526 if (pap_check_hook != NULL) {
1527 ret = (*pap_check_hook)();
1528 if (ret >= 0)
1529 return ret;
1530 }
1531
1532 filename = _PATH_UPAPFILE;
1533 f = fopen(filename, "r");
1534 if (f == NULL)
1535 return 0;
1536
1537 ret = scan_authfile(f, (explicit_remote? remote_name: NULL), our_name,
1538 NULL, &addrs, NULL, filename);
1539 (void) fclose(f);
1540 if (ret >= 0 && !some_ip_ok(addrs)) {
1541 if (lacks_ipp != NULL)
1542 *lacks_ipp = 1;
1543 ret = -1;
1544 }
1545 if (addrs != NULL)
1546 free_wordlist(addrs);
1547
1548 return ret >= 0;
1549 }
1550
1551
1552 /*
1553 * have_chap_secret - check whether we have a CHAP file with a secret
1554 * that we could possibly use for authenticating `client' on `server'.
1555 * Either or both can be the null string, meaning we don't know the
1556 * identity yet.
1557 */
1558 static int
have_chap_secret(client,server,need_ip,lacks_ipp)1559 have_chap_secret(client, server, need_ip, lacks_ipp)
1560 char *client;
1561 char *server;
1562 int need_ip;
1563 int *lacks_ipp;
1564 {
1565 FILE *f;
1566 int ret;
1567 char *filename;
1568 struct wordlist *addrs;
1569
1570 filename = _PATH_CHAPFILE;
1571 f = fopen(filename, "r");
1572 if (f == NULL)
1573 return 0;
1574
1575 if (client != NULL && client[0] == '\0')
1576 client = NULL;
1577 if (server != NULL && server[0] == '\0')
1578 server = NULL;
1579
1580 ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename);
1581 (void) fclose(f);
1582 if (ret >= 0 && need_ip && !some_ip_ok(addrs)) {
1583 if (lacks_ipp != NULL)
1584 *lacks_ipp = 1;
1585 ret = -1;
1586 }
1587 if (addrs != NULL)
1588 free_wordlist(addrs);
1589
1590 return ret >= 0;
1591 }
1592
1593
1594 /*
1595 * get_secret - open the CHAP secret file and return the secret
1596 * for authenticating the given client on the given server.
1597 *
1598 * "am_server" means that we're the authenticator (demanding
1599 * identity from the peer).
1600 *
1601 * "!am_server" means that we're the authenticatee (supplying
1602 * identity to the peer).
1603 */
1604 int
get_secret(unit,client,server,secret,secret_len,am_server)1605 get_secret(unit, client, server, secret, secret_len, am_server)
1606 int unit;
1607 char *client;
1608 char *server;
1609 char *secret;
1610 int *secret_len;
1611 int am_server;
1612 {
1613 FILE *f;
1614 int ret, len;
1615 char *filename;
1616 struct wordlist *addrs, *opts;
1617 char secbuf[MAXWORDLEN];
1618
1619 /*
1620 * Support the 'password' option on authenticatee only in order to
1621 * avoid obvious security problem (authenticator and authenticatee
1622 * within a given implementation must never share secrets).
1623 */
1624 if (!am_server && passwd[0] != '\0') {
1625 (void) strlcpy(secbuf, passwd, sizeof(secbuf));
1626 } else {
1627 filename = _PATH_CHAPFILE;
1628 addrs = NULL;
1629 secbuf[0] = '\0';
1630
1631 f = fopen(filename, "r");
1632 if (f == NULL) {
1633 error("Can't open chap secret file %s: %m", filename);
1634 return 0;
1635 }
1636 check_access(f, filename);
1637
1638 ret = scan_authfile(f, client, server, secbuf, &addrs, &opts,
1639 filename);
1640 (void) fclose(f);
1641 if (ret < 0) {
1642 if (scan_server_match_failed[0] != '\0')
1643 warn("possible configuration error: local name is %q, but "
1644 "found %q instead", our_name, scan_server_match_failed);
1645 return 0;
1646 }
1647
1648 /* Only the authenticator cares about limiting peer addresses. */
1649 if (am_server)
1650 set_allowed_addrs(unit, addrs, opts);
1651 else if (opts != NULL)
1652 free_wordlist(opts);
1653 if (addrs != NULL)
1654 free_wordlist(addrs);
1655 }
1656
1657 len = strlen(secbuf);
1658 if (len > MAXSECRETLEN) {
1659 error("Secret for %s on %s is too long", client, server);
1660 len = MAXSECRETLEN;
1661 }
1662 /* Do not leave a temporary copy of the secret on the stack. */
1663 BCOPY(secbuf, secret, len);
1664 BZERO(secbuf, sizeof(secbuf));
1665 *secret_len = len;
1666
1667 return 1;
1668 }
1669
1670 /*
1671 * set_allowed_addrs() - set the list of allowed addresses.
1672 * The caller must also look for `--' indicating options to apply for
1673 * this peer and leaves the following words in extra_options.
1674 */
1675 static void
set_allowed_addrs(unit,addrs,opts)1676 set_allowed_addrs(unit, addrs, opts)
1677 int unit;
1678 struct wordlist *addrs;
1679 struct wordlist *opts;
1680 {
1681 int n;
1682 struct wordlist *ap, **pap;
1683 struct permitted_ip *ip;
1684 char *ptr_word, *ptr_mask;
1685 struct hostent *hp;
1686 struct netent *np;
1687 u_int32_t a, mask, newmask, ah, offset;
1688 struct ipcp_options *wo = &ipcp_wantoptions[unit];
1689 u_int32_t suggested_ip = 0;
1690 int err_num;
1691
1692 if (addresses[unit] != NULL)
1693 free(addresses[unit]);
1694 addresses[unit] = NULL;
1695 if (extra_options != NULL)
1696 free_wordlist(extra_options);
1697 extra_options = opts;
1698
1699 /*
1700 * Count the number of IP addresses given.
1701 */
1702 for (n = 0, pap = &addrs; (ap = *pap) != NULL; pap = &ap->next)
1703 ++n;
1704 if (n == 0)
1705 return;
1706 ip = (struct permitted_ip *) malloc((n + 1) * sizeof(struct permitted_ip));
1707 if (ip == NULL)
1708 return;
1709
1710 n = 0;
1711 for (ap = addrs; ap != NULL; ap = ap->next) {
1712 /* "-" means no addresses authorized, "*" means any address allowed */
1713 ptr_word = ap->word;
1714 if (strcmp(ptr_word, "-") == 0)
1715 break;
1716 if (strcmp(ptr_word, "*") == 0) {
1717 ip[n].permit = 1;
1718 ip[n].base = ip[n].mask = 0;
1719 ++n;
1720 break;
1721 }
1722
1723 ip[n].permit = 1;
1724 if (*ptr_word == '!') {
1725 ip[n].permit = 0;
1726 ++ptr_word;
1727 }
1728
1729 mask = ~ (u_int32_t) 0;
1730 offset = 0;
1731 ptr_mask = strchr (ptr_word, '/');
1732 if (ptr_mask != NULL) {
1733 int bit_count;
1734 char *endp;
1735
1736 bit_count = (int) strtol (ptr_mask+1, &endp, 10);
1737 if (bit_count <= 0 || bit_count > 32) {
1738 warn("invalid address length %v in authorized address list",
1739 ptr_mask+1);
1740 continue;
1741 }
1742 bit_count = 32 - bit_count; /* # bits in host part */
1743 if (*endp == '+') {
1744 offset = ifunit + 1;
1745 ++endp;
1746 }
1747 if (*endp != '\0') {
1748 warn("invalid address length syntax: %v", ptr_mask+1);
1749 continue;
1750 }
1751 *ptr_mask = '\0';
1752 mask <<= bit_count;
1753 }
1754
1755 /* Try to interpret value as host name or numeric address first */
1756 hp = getipnodebyname(ptr_word, AF_INET, 0, &err_num);
1757 if (hp != NULL) {
1758 (void) memcpy(&a, hp->h_addr, sizeof(a));
1759 freehostent(hp);
1760 } else {
1761 char *cp = ptr_word + strlen(ptr_word);
1762 if (cp > ptr_word)
1763 cp--;
1764 if (*cp == '+') {
1765 offset = ifunit + 1;
1766 *cp = '\0';
1767 }
1768 np = getnetbyname (ptr_word);
1769 if (np != NULL && np->n_addrtype == AF_INET) {
1770 ah = np->n_net;
1771 newmask = (u_int32_t)~0;
1772 if ((ah & 0xff000000ul) == 0)
1773 ah <<= 8, newmask <<= 8;
1774 if ((ah & 0xff000000ul) == 0)
1775 ah <<= 8, newmask <<= 8;
1776 if ((ah & 0xff000000ul) == 0)
1777 ah <<= 8, newmask <<= 8;
1778 if (ptr_mask == NULL)
1779 mask = newmask;
1780 a = htonl(ah);
1781 }
1782 }
1783
1784 if (ptr_mask != NULL)
1785 *ptr_mask = '/';
1786
1787 if (a == (u_int32_t)-1L) {
1788 warn("unknown host %s in auth. address list", ap->word);
1789 continue;
1790 }
1791 if (offset != 0) {
1792 if (offset >= ~mask) {
1793 warn("interface unit %d too large for subnet %v",
1794 ifunit, ptr_word);
1795 continue;
1796 }
1797 a = htonl((ntohl(a) & mask) + offset);
1798 mask = ~(u_int32_t)0;
1799 }
1800 ip[n].mask = htonl(mask);
1801 ip[n].base = a & ip[n].mask;
1802 ++n;
1803 if (~mask == 0 && suggested_ip == 0)
1804 suggested_ip = a;
1805 }
1806
1807 /* Sentinel value at end of list */
1808 ip[n].permit = 0; /* make the last entry forbid all addresses */
1809 ip[n].base = 0; /* to terminate the list */
1810 ip[n].mask = 0;
1811
1812 addresses[unit] = ip;
1813
1814 /*
1815 * If the address given for the peer isn't authorized, or if
1816 * the user hasn't given one, AND there is an authorized address
1817 * which is a single host, then use that if we find one.
1818 */
1819 if (suggested_ip != 0
1820 && (wo->hisaddr == 0 || !auth_ip_addr(unit, wo->hisaddr)))
1821 wo->hisaddr = suggested_ip;
1822 }
1823
1824 /*
1825 * auth_ip_addr - check whether the peer is authorized to use
1826 * a given IP address. Returns 1 if authorized, 0 otherwise.
1827 */
1828 int
auth_ip_addr(unit,addr)1829 auth_ip_addr(unit, addr)
1830 int unit;
1831 u_int32_t addr;
1832 {
1833 int ok;
1834
1835 /* don't allow loopback or multicast address */
1836 if (bad_ip_adrs(addr))
1837 return 0;
1838
1839 if (addresses[unit] != NULL) {
1840 ok = ip_addr_check(addr, addresses[unit]);
1841 if (ok >= 0)
1842 return ok;
1843 }
1844 if (auth_required)
1845 return 0; /* no addresses authorized */
1846 return allow_any_ip || privileged || !have_route_to(addr);
1847 }
1848
1849 static int
ip_addr_check(addr,addrs)1850 ip_addr_check(addr, addrs)
1851 u_int32_t addr;
1852 struct permitted_ip *addrs;
1853 {
1854 /* This loop is safe because of the sentinel value in set_allowed_addrs */
1855 for (; ; ++addrs)
1856 if ((addr & addrs->mask) == addrs->base)
1857 return addrs->permit;
1858 }
1859
1860 /*
1861 * bad_ip_adrs - return 1 if the IP address is one we don't want
1862 * to use, such as an address in the loopback net or a multicast address.
1863 * addr is in network byte order.
1864 */
1865 int
bad_ip_adrs(addr)1866 bad_ip_adrs(addr)
1867 u_int32_t addr;
1868 {
1869 addr = ntohl(addr);
1870 return
1871 #ifndef ALLOW_127_NET
1872 (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET ||
1873 #endif
1874 #ifndef ALLOW_0_NET
1875 ((addr >> IN_CLASSA_NSHIFT) == 0 && addr != 0) ||
1876 #endif
1877 IN_MULTICAST(addr);
1878 }
1879
1880 /*
1881 * some_ip_ok - check a wordlist to see if it authorizes any
1882 * IP address(es).
1883 */
1884 static int
some_ip_ok(addrs)1885 some_ip_ok(addrs)
1886 struct wordlist *addrs;
1887 {
1888 for (; addrs != NULL; addrs = addrs->next) {
1889 if (addrs->word[0] == '-')
1890 break;
1891 if (addrs->word[0] != '!')
1892 return 1; /* some IP address is allowed */
1893 }
1894 return 0;
1895 }
1896
1897 /*
1898 * check_access - complain if a secret file has too-liberal permissions.
1899 */
1900 static void
check_access(f,filename)1901 check_access(f, filename)
1902 FILE *f;
1903 char *filename;
1904 {
1905 struct stat sbuf;
1906
1907 if (fstat(fileno(f), &sbuf) < 0) {
1908 warn("cannot stat secret file %s: %m", filename);
1909 } else if ((sbuf.st_mode & (S_IRWXG | S_IRWXO)) != 0) {
1910 warn("Warning - secret file %s has world and/or group access",
1911 filename);
1912 }
1913 }
1914
1915
1916 /*
1917 * scan_authfile - Scan an authorization file for a secret suitable
1918 * for authenticating `client' on `server'. The return value is -1 if
1919 * no secret is found, otherwise >= 0. The return value has
1920 * NONWILD_CLIENT set if the secret didn't have "*" for the client,
1921 * and NONWILD_SERVER set if the secret didn't have "*" for the
1922 * server.
1923
1924 * Any following words on the line up to a "--" (i.e. address
1925 * authorization info) are placed in a wordlist and returned in
1926 * *addrs. Any following words (extra options) are placed in a
1927 * wordlist and returned in *opts. If opts is NULL, these are just
1928 * discarded. Otherwise, the extra_opt_* variables are set to
1929 * indicate the source of the options.
1930 *
1931 * We assume secret is NULL or points to MAXWORDLEN bytes of space.
1932 */
1933 static int
scan_authfile(f,client,server,secret,addrs,opts,filename)1934 scan_authfile(f, client, server, secret, addrs, opts, filename)
1935 FILE *f;
1936 char *client;
1937 char *server;
1938 char *secret;
1939 struct wordlist **addrs;
1940 struct wordlist **opts;
1941 char *filename;
1942 {
1943 int newline, xxx, sline;
1944 int got_flag, best_flag;
1945 FILE *sf;
1946 struct wordlist *ap, *addr_list, *alist, **app;
1947 char word[MAXWORDLEN];
1948 char atfile[MAXWORDLEN];
1949 char lsecret[MAXWORDLEN];
1950
1951 scan_server_match_failed[0] = '\0';
1952
1953 if (addrs != NULL)
1954 *addrs = NULL;
1955 if (opts != NULL)
1956 *opts = NULL;
1957 addr_list = NULL;
1958 option_line = 0;
1959 if (!getword(f, word, &newline, filename)) {
1960 if (debug)
1961 dbglog("%s is apparently empty", filename);
1962 return -1; /* file is empty??? */
1963 }
1964 newline = 1;
1965 best_flag = -1;
1966 for (;;) {
1967 /*
1968 * Skip until we find a word at the start of a line.
1969 */
1970 while (!newline && getword(f, word, &newline, filename))
1971 ;
1972 if (!newline)
1973 break; /* got to end of file */
1974
1975 sline = option_line;
1976 /*
1977 * Got a client - check if it's a match or a wildcard.
1978 */
1979 got_flag = 0;
1980 if (client != NULL && strcmp(word, client) != 0 && !ISWILD(word)) {
1981 newline = 0;
1982 continue;
1983 }
1984 if (!ISWILD(word))
1985 got_flag = NONWILD_CLIENT;
1986
1987 /*
1988 * Now get a server and check if it matches.
1989 */
1990 if (!getword(f, word, &newline, filename))
1991 break;
1992 if (newline)
1993 continue;
1994 if (!ISWILD(word)) {
1995 if (server != NULL && strcmp(word, server) != 0) {
1996 (void) strcpy(scan_server_match_failed, word);
1997 continue;
1998 }
1999 got_flag |= NONWILD_SERVER;
2000 }
2001
2002 /*
2003 * Got some sort of a match - see if it's better than what
2004 * we have already.
2005 */
2006 if (got_flag <= best_flag)
2007 continue;
2008
2009 /*
2010 * Get the secret.
2011 */
2012 if (!getword(f, word, &newline, filename))
2013 break;
2014 if (newline)
2015 continue;
2016
2017 /*
2018 * Special syntax: @filename means read secret from file.
2019 * Because the secrets files are modifiable only by root,
2020 * it's safe to open this file as root. One small addition --
2021 * if open fails, we try as the regular user; just in case
2022 * it's over NFS and not root-equivalent.
2023 */
2024 if (word[0] == '@') {
2025 (void) strlcpy(atfile, word+1, sizeof(atfile));
2026 if ((sf = fopen(atfile, "r")) == NULL) {
2027 (void) seteuid(getuid());
2028 sf = fopen(atfile, "r");
2029 (void) seteuid(0);
2030 }
2031 if (sf == NULL) {
2032 warn("can't open indirect secret file %s: %m", atfile);
2033 continue;
2034 }
2035 check_access(sf, atfile);
2036 if (!getword(sf, word, &xxx, atfile)) {
2037 warn("no secret in indirect secret file %s", atfile);
2038 (void) fclose(sf);
2039 continue;
2040 }
2041 (void) fclose(sf);
2042 }
2043 if (secret != NULL)
2044 (void) strlcpy(lsecret, word, sizeof(lsecret));
2045
2046 /*
2047 * Now read address authorization info and make a wordlist.
2048 */
2049 app = &alist;
2050 for (;;) {
2051 if (!getword(f, word, &newline, filename) || newline)
2052 break;
2053 ap = (struct wordlist *) malloc(sizeof(struct wordlist));
2054 if (ap == NULL)
2055 novm("authorized addresses");
2056 ap->word = strdup(word);
2057 if (ap->word == NULL)
2058 novm("authorized addresses");
2059 *app = ap;
2060 app = &ap->next;
2061 }
2062 *app = NULL;
2063
2064 /*
2065 * This is the best so far; remember it.
2066 */
2067 best_flag = got_flag;
2068 if (addr_list != NULL)
2069 free_wordlist(addr_list);
2070 addr_list = alist;
2071 if (secret != NULL)
2072 (void) strlcpy(secret, lsecret, MAXWORDLEN);
2073
2074 if (opts != NULL) {
2075 extra_opt_filename = filename;
2076 extra_opt_line = sline;
2077 }
2078
2079 if (!newline)
2080 break;
2081 }
2082
2083 /* scan for a -- word indicating the start of options */
2084 for (app = &addr_list; (ap = *app) != NULL; app = &ap->next)
2085 if (strcmp(ap->word, "--") == 0)
2086 break;
2087 /* ap = start of options */
2088 if (ap != NULL) {
2089 ap = ap->next; /* first option */
2090 free(*app); /* free the "--" word */
2091 *app = NULL; /* terminate addr list */
2092 }
2093 if (opts != NULL)
2094 *opts = ap;
2095 else if (ap != NULL)
2096 free_wordlist(ap);
2097 if (addrs != NULL)
2098 *addrs = addr_list;
2099 else if (addr_list != NULL)
2100 free_wordlist(addr_list);
2101
2102 return best_flag;
2103 }
2104
2105 /*
2106 * free_wordlist - release memory allocated for a wordlist.
2107 */
2108 static void
free_wordlist(wp)2109 free_wordlist(wp)
2110 struct wordlist *wp;
2111 {
2112 struct wordlist *next;
2113
2114 while (wp != NULL) {
2115 next = wp->next;
2116 free(wp);
2117 wp = next;
2118 }
2119 }
2120
2121 /*
2122 * auth_script_done - called when the auth-up or auth-down script
2123 * has finished.
2124 */
2125 /*ARGSUSED*/
2126 static void
auth_script_done(arg,status)2127 auth_script_done(arg, status)
2128 void *arg;
2129 int status;
2130 {
2131 auth_script_pid = 0;
2132 switch (auth_script_state) {
2133 case s_up:
2134 if (auth_state == s_down) {
2135 auth_script_state = s_down;
2136 auth_script(_PATH_AUTHDOWN);
2137 }
2138 break;
2139 case s_down:
2140 if (auth_state == s_up) {
2141 auth_script_state = s_up;
2142 auth_script(_PATH_AUTHUP);
2143 }
2144 break;
2145 }
2146 }
2147
2148 /*
2149 * auth_script - execute a script with arguments
2150 * interface-name peer-name real-user tty speed
2151 */
2152 static void
auth_script(script)2153 auth_script(script)
2154 char *script;
2155 {
2156 char strspeed[32];
2157 struct passwd *pw;
2158 char struid[32];
2159 char *user_name;
2160 char *argv[8];
2161
2162 if ((pw = getpwuid(getuid())) != NULL && pw->pw_name != NULL)
2163 user_name = pw->pw_name;
2164 else {
2165 (void) slprintf(struid, sizeof(struid), "%d", getuid());
2166 user_name = struid;
2167 }
2168 (void) slprintf(strspeed, sizeof(strspeed), "%d", baud_rate);
2169
2170 argv[0] = script;
2171 argv[1] = ifname;
2172 argv[2] = peer_authname;
2173 argv[3] = user_name;
2174 argv[4] = devnam;
2175 argv[5] = strspeed;
2176 argv[6] = NULL;
2177
2178 auth_script_pid = run_program(script, argv, 0, auth_script_done, NULL);
2179 }
2180