2 * auth.c - PPP authentication and phase control.
4 * Copyright (c) 1993 The Australian National University.
7 * Redistribution and use in source and binary forms are permitted
8 * provided that the above copyright notice and this paragraph are
9 * duplicated in all such forms and that any documentation,
10 * advertising materials, and other materials related to such
11 * distribution and use acknowledge that the software was developed
12 * by the Australian National University. The name of the University
13 * may not be used to endorse or promote products derived from this
14 * software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19 * Copyright (c) 1989 Carnegie Mellon University.
20 * All rights reserved.
22 * Redistribution and use in source and binary forms are permitted
23 * provided that the above copyright notice and this paragraph are
24 * duplicated in all such forms and that any documentation,
25 * advertising materials, and other materials related to such
26 * distribution and use acknowledge that the software was developed
27 * by Carnegie Mellon University. The name of the
28 * University may not be used to endorse or promote products derived
29 * from this software without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
32 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
35 #define RCSID "$Id: auth.c,v 1.77 2002/05/21 17:26:49 dfs Exp $"
44 #include <sys/types.h>
46 #include <sys/socket.h>
49 #if defined(_PATH_LASTLOG) && defined(_linux_)
54 #include <netinet/in.h>
55 #include <arpa/inet.h>
58 #include <security/pam_appl.h>
64 #define PW_PPP PW_LOGIN
80 #include "pathnames.h"
82 static const char rcsid[] = RCSID;
84 /* Bits in scan_authfile return value */
85 #define NONWILD_SERVER 1
86 #define NONWILD_CLIENT 2
88 #define ISWILD(word) (word[0] == '*' && word[1] == 0)
90 /* The name by which the peer authenticated itself to us. */
91 char peer_authname[MAXNAMELEN];
93 /* Records which authentication operations haven't completed yet. */
94 static int auth_pending[NUM_PPP];
96 /* Records which authentication operations have been completed. */
97 int auth_done[NUM_PPP];
99 /* Set if we have successfully called plogin() */
100 static int logged_in;
102 /* List of addresses which the peer may use. */
103 static struct permitted_ip *addresses[NUM_PPP];
105 /* Wordlist giving addresses which the peer may use
106 without authenticating itself. */
107 static struct wordlist *noauth_addrs;
109 /* Extra options to apply, from the secrets file entry for the peer. */
110 static struct wordlist *extra_options;
112 /* Number of network protocols which we have opened. */
113 static int num_np_open;
115 /* Number of network protocols which have come up. */
116 static int num_np_up;
118 /* Set if we got the contents of passwd[] from the pap-secrets file. */
119 static int passwd_from_file;
121 /* Set if we require authentication only because we have a default route. */
122 static bool default_auth;
124 /* Hook to enable a plugin to control the idle time limit */
125 int (*idle_time_hook) __P((struct ppp_idle *)) = NULL;
127 /* Hook for a plugin to say whether we can possibly authenticate any peer */
128 int (*pap_check_hook) __P((void)) = NULL;
130 /* Hook for a plugin to check the PAP user and password */
131 int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
132 struct wordlist **paddrs,
133 struct wordlist **popts)) = NULL;
135 /* Hook for a plugin to know about the PAP user logout */
136 void (*pap_logout_hook) __P((void)) = NULL;
138 /* Hook for a plugin to get the PAP password for authenticating us */
139 int (*pap_passwd_hook) __P((char *user, char *passwd)) = NULL;
141 /* Hook for a plugin to say whether it is OK if the peer
142 refuses to authenticate. */
143 int (*null_auth_hook) __P((struct wordlist **paddrs,
144 struct wordlist **popts)) = NULL;
146 int (*allowed_address_hook) __P((u_int32_t addr)) = NULL;
148 /* A notifier for when the peer has authenticated itself,
149 and we are proceeding to the network phase. */
150 struct notifier *auth_up_notifier = NULL;
152 /* A notifier for when the link goes down. */
153 struct notifier *link_down_notifier = NULL;
156 * This is used to ensure that we don't start an auth-up/down
157 * script while one is already running.
164 static enum script_state auth_state = s_down;
165 static enum script_state auth_script_state = s_down;
166 static pid_t auth_script_pid = 0;
168 static int used_login; /* peer authenticated against login database */
173 bool uselogin = 0; /* Use /etc/passwd for checking PAP */
174 bool cryptpap = 0; /* Passwords in pap-secrets are encrypted */
175 bool refuse_pap = 0; /* Don't wanna auth. ourselves with PAP */
176 bool refuse_chap = 0; /* Don't wanna auth. ourselves with CHAP */
178 bool refuse_mschap = 0; /* Don't wanna auth. ourselves with MS-CHAP */
179 bool refuse_mschap_v2 = 0; /* Don't wanna auth. ourselves with MS-CHAPv2 */
181 bool refuse_mschap = 1; /* Don't wanna auth. ourselves with MS-CHAP */
182 bool refuse_mschap_v2 = 1; /* Don't wanna auth. ourselves with MS-CHAPv2 */
184 bool usehostname = 0; /* Use hostname for our_name */
185 bool auth_required = 0; /* Always require authentication from peer */
186 bool allow_any_ip = 0; /* Allow peer to use any IP address */
187 bool explicit_remote = 0; /* User specified explicit remote name */
188 char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
190 static char *uafname; /* name of most recent +ua file */
192 extern char *crypt __P((const char *, const char *));
194 /* Prototypes for procedures local to this file. */
196 static void network_phase __P((int));
197 static void check_idle __P((void *));
198 static void connect_time_expired __P((void *));
199 static int plogin __P((char *, char *, char **));
200 static void plogout __P((void));
201 static int null_login __P((int));
202 static int get_pap_passwd __P((char *));
203 static int have_pap_secret __P((int *));
204 static int have_chap_secret __P((char *, char *, int, int *));
205 static int ip_addr_check __P((u_int32_t, struct permitted_ip *));
206 static int scan_authfile __P((FILE *, char *, char *, char *,
207 struct wordlist **, struct wordlist **,
209 static void free_wordlist __P((struct wordlist *));
210 static void auth_script __P((char *));
211 static void auth_script_done __P((void *));
212 static void set_allowed_addrs __P((int, struct wordlist *, struct wordlist *));
213 static int some_ip_ok __P((struct wordlist *));
214 static int setupapfile __P((char **));
215 static int privgroup __P((char **));
216 static int set_noauth_addr __P((char **));
217 static void check_access __P((FILE *, char *));
218 static int wordlist_count __P((struct wordlist *));
221 * Authentication-related options.
223 option_t auth_options[] = {
224 { "auth", o_bool, &auth_required,
225 "Require authentication from peer", OPT_PRIO | 1 },
226 { "noauth", o_bool, &auth_required,
227 "Don't require peer to authenticate", OPT_PRIOSUB | OPT_PRIV | OPT_A2COPY,
229 { "require-pap", o_bool, &lcp_wantoptions[0].neg_upap,
230 "Require PAP authentication from peer",
231 OPT_PRIOSUB | OPT_A2COPY | 1, &auth_required },
232 { "+pap", o_bool, &lcp_wantoptions[0].neg_upap,
233 "Require PAP authentication from peer",
234 OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | 1, &auth_required },
235 { "require-chap", o_bool, &lcp_wantoptions[0].neg_chap,
236 "Require CHAP authentication from peer",
237 OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MD5,
238 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
239 { "+chap", o_bool, &lcp_wantoptions[0].neg_chap,
240 "Require CHAP authentication from peer",
241 OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MD5,
242 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
244 { "require-mschap", o_bool, &lcp_wantoptions[0].neg_chap,
245 "Require MS-CHAP authentication from peer",
246 OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT,
247 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
248 { "+mschap", o_bool, &lcp_wantoptions[0].neg_chap,
249 "Require MS-CHAP authentication from peer",
250 OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT,
251 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
252 { "require-mschap-v2", o_bool, &lcp_wantoptions[0].neg_chap,
253 "Require MS-CHAPv2 authentication from peer",
254 OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT_V2,
255 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
256 { "+mschap-v2", o_bool, &lcp_wantoptions[0].neg_chap,
257 "Require MS-CHAPv2 authentication from peer",
258 OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT_V2,
259 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
262 { "refuse-pap", o_bool, &refuse_pap,
263 "Don't agree to auth to peer with PAP", 1 },
264 { "-pap", o_bool, &refuse_pap,
265 "Don't allow PAP authentication with peer", OPT_ALIAS | 1 },
266 { "refuse-chap", o_bool, &refuse_chap,
267 "Don't agree to auth to peer with CHAP", OPT_A2CLRB | MDTYPE_MD5,
268 &lcp_allowoptions[0].chap_mdtype },
269 { "-chap", o_bool, &refuse_chap,
270 "Don't allow CHAP authentication with peer",
271 OPT_ALIAS | OPT_A2CLRB | MDTYPE_MD5,
272 &lcp_allowoptions[0].chap_mdtype },
274 { "refuse-mschap", o_bool, &refuse_mschap,
275 "Don't agree to auth to peer with MS-CHAP",
276 OPT_A2CLRB | MDTYPE_MICROSOFT, &lcp_allowoptions[0].chap_mdtype },
277 { "-mschap", o_bool, &refuse_mschap,
278 "Don't allow MS-CHAP authentication with peer",
279 OPT_ALIAS | OPT_A2CLRB | MDTYPE_MICROSOFT,
280 &lcp_allowoptions[0].chap_mdtype },
281 { "refuse-mschap-v2", o_bool, &refuse_mschap_v2,
282 "Don't agree to auth to peer with MS-CHAPv2",
283 OPT_A2CLRB | MDTYPE_MICROSOFT_V2, &lcp_allowoptions[0].chap_mdtype },
284 { "-mschap-v2", o_bool, &refuse_mschap_v2,
285 "Don't allow MS-CHAPv2 authentication with peer",
286 OPT_ALIAS | OPT_A2CLRB | MDTYPE_MICROSOFT_V2,
287 &lcp_allowoptions[0].chap_mdtype },
290 { "name", o_string, our_name,
291 "Set local name for authentication",
292 OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXNAMELEN },
294 { "+ua", o_special, (void *)setupapfile,
295 "Get PAP user and password from file",
296 OPT_PRIO | OPT_A2STRVAL, &uafname },
298 { "user", o_string, user,
299 "Set name for auth with peer", OPT_PRIO | OPT_STATIC, NULL, MAXNAMELEN },
301 { "password", o_string, passwd,
302 "Password for authenticating us to the peer",
303 OPT_PRIO | OPT_STATIC | OPT_HIDE, NULL, MAXSECRETLEN },
305 { "usehostname", o_bool, &usehostname,
306 "Must use hostname for authentication", 1 },
308 { "remotename", o_string, remote_name,
309 "Set remote name for authentication", OPT_PRIO | OPT_STATIC,
310 &explicit_remote, MAXNAMELEN },
312 { "login", o_bool, &uselogin,
313 "Use system password database for PAP", 1 },
315 { "papcrypt", o_bool, &cryptpap,
316 "PAP passwords are encrypted", 1 },
318 { "privgroup", o_special, (void *)privgroup,
319 "Allow group members to use privileged options", OPT_PRIV | OPT_A2LIST },
321 { "allow-ip", o_special, (void *)set_noauth_addr,
322 "Set IP address(es) which can be used without authentication",
323 OPT_PRIV | OPT_A2LIST },
329 * setupapfile - specifies UPAP info for authenticating with peer.
337 char u[MAXNAMELEN], p[MAXSECRETLEN];
340 lcp_allowoptions[0].neg_upap = 1;
342 /* open user info file */
343 fname = strdup(*argv);
345 novm("+ua file name");
347 ufile = fopen(fname, "r");
350 option_error("unable to open user login data file %s", fname);
353 check_access(ufile, fname);
357 if (fgets(u, MAXNAMELEN - 1, ufile) == NULL
358 || fgets(p, MAXSECRETLEN - 1, ufile) == NULL){
359 option_error("unable to read user login data file %s", fname);
364 /* get rid of newlines */
366 if (l > 0 && u[l-1] == '\n')
369 if (l > 0 && p[l-1] == '\n')
372 if (override_value("user", option_priority, fname))
373 strlcpy(user, u, sizeof(user));
374 if (override_value("passwd", option_priority, fname))
375 strlcpy(passwd, p, sizeof(passwd));
382 * privgroup - allow members of the group to have privileged access.
393 option_error("group %s is unknown", *argv);
396 for (i = 0; i < ngroups; ++i) {
397 if (groups[i] == g->gr_gid) {
407 * set_noauth_addr - set address(es) that can be used without authentication.
408 * Equivalent to specifying an entry like `"" * "" addr' in pap-secrets.
411 set_noauth_addr(argv)
415 int l = strlen(addr) + 1;
418 wp = (struct wordlist *) malloc(sizeof(struct wordlist) + l);
420 novm("allow-ip argument");
421 wp->word = (char *) (wp + 1);
422 wp->next = noauth_addrs;
423 BCOPY(addr, wp->word, l);
430 * An Open on LCP has requested a change from Dead to Establish phase.
431 * Do what's necessary to bring the physical layer up.
440 * LCP has terminated the link; go to the Dead phase and take the
441 * physical layer down.
444 link_terminated(unit)
447 if (phase == PHASE_DEAD)
449 if (pap_logout_hook) {
455 new_phase(PHASE_DEAD);
456 notice("Connection terminated.");
460 * LCP has gone down; it will either die or try to re-establish.
467 struct protent *protp;
469 notify(link_down_notifier, 0);
471 if (auth_script_state == s_up && auth_script_pid == 0) {
472 update_link_stats(unit);
473 auth_script_state = s_down;
474 auth_script(_PATH_AUTHDOWN);
476 for (i = 0; (protp = protocols[i]) != NULL; ++i) {
477 if (!protp->enabled_flag)
479 if (protp->protocol != PPP_LCP && protp->lowerdown != NULL)
480 (*protp->lowerdown)(unit);
481 if (protp->protocol < 0xC000 && protp->close != NULL)
482 (*protp->close)(unit, "LCP down");
486 if (phase != PHASE_DEAD)
487 new_phase(PHASE_ESTABLISH);
491 * The link is established.
492 * Proceed to the Dead, Authenticate or Network phase as appropriate.
495 link_established(unit)
499 lcp_options *wo = &lcp_wantoptions[unit];
500 lcp_options *go = &lcp_gotoptions[unit];
501 lcp_options *ho = &lcp_hisoptions[unit];
503 struct protent *protp;
506 * Tell higher-level protocols that LCP is up.
508 for (i = 0; (protp = protocols[i]) != NULL; ++i)
509 if (protp->protocol != PPP_LCP && protp->enabled_flag
510 && protp->lowerup != NULL)
511 (*protp->lowerup)(unit);
513 if (auth_required && !(go->neg_upap || go->neg_chap)) {
515 * We wanted the peer to authenticate itself, and it refused:
516 * if we have some address(es) it can use without auth, fine,
517 * otherwise treat it as though it authenticated with PAP using
518 * a username of "" and a password of "". If that's not OK,
521 if (noauth_addrs != NULL) {
522 set_allowed_addrs(unit, NULL, NULL);
523 } else if (!wo->neg_upap || uselogin || !null_login(unit)) {
524 warn("peer refused to authenticate: terminating link");
525 lcp_close(unit, "peer refused to authenticate");
526 status = EXIT_PEER_AUTH_FAILED;
531 new_phase(PHASE_AUTHENTICATE);
535 ChapAuthPeer(unit, our_name, CHAP_DIGEST(go->chap_mdtype));
537 } else if (go->neg_upap) {
542 ChapAuthWithPeer(unit, user, CHAP_DIGEST(ho->chap_mdtype));
543 auth |= CHAP_WITHPEER;
544 } else if (ho->neg_upap) {
545 if (passwd[0] == 0) {
546 passwd_from_file = 1;
547 if (!get_pap_passwd(passwd))
548 error("No secret found for PAP login");
550 upap_authwithpeer(unit, user, passwd);
551 auth |= PAP_WITHPEER;
553 auth_pending[unit] = auth;
561 * Proceed to the network phase.
567 lcp_options *go = &lcp_gotoptions[unit];
570 * If the peer had to authenticate, run the auth-up script now.
572 if (go->neg_chap || go->neg_upap) {
573 notify(auth_up_notifier, 0);
575 if (auth_script_state == s_down && auth_script_pid == 0) {
576 auth_script_state = s_up;
577 auth_script(_PATH_AUTHUP);
583 * If we negotiated callback, do it now.
586 new_phase(PHASE_CALLBACK);
587 (*cbcp_protent.open)(unit);
593 * Process extra options from the secrets file
596 options_from_list(extra_options, 1);
597 free_wordlist(extra_options);
600 start_networks(unit);
607 static int started = 0;
609 struct protent *protp;
610 int ecp_required, mppe_required;
614 new_phase(PHASE_NETWORK);
616 #ifdef HAVE_MULTILINK
618 if (mp_join_bundle()) {
619 if (updetach && !nodetach)
624 #endif /* HAVE_MULTILINK */
628 set_filters(&pass_filter, &active_filter);
630 /* Start CCP and ECP */
631 for (i = 0; (protp = protocols[i]) != NULL; ++i)
632 if ((protp->protocol == PPP_ECP || protp->protocol == PPP_CCP)
633 && protp->enabled_flag && protp->open != NULL)
638 * Bring up other network protocols after encryption has completed.
639 * OPENED here merely means that negotiation has completed. It is
640 * up to the protocol to correctly terminate or disable LCP/NCP
641 * based on the result of the negotiation.
643 ecp_required = ecp_gotoptions[unit].required;
644 mppe_required = ccp_gotoptions[unit].mppe;
645 if ((!ecp_required && !mppe_required)
646 || (ecp_required && ecp_fsm[unit].state == OPENED)
647 || (mppe_required && ccp_fsm[unit].state == OPENED)) {
648 for (i = 0; (protp = protocols[i]) != NULL; ++i)
649 if (protp->protocol < 0xC000
650 && protp->protocol != PPP_CCP && protp->protocol != PPP_ECP
651 && protp->enabled_flag && protp->open != NULL) {
656 if (num_np_open == 0)
658 lcp_close(0, "No network protocols running");
663 * The peer has failed to authenticate himself using `protocol'.
666 auth_peer_fail(unit, protocol)
670 * Authentication failure: take the link down
672 lcp_close(unit, "Authentication failed");
673 status = EXIT_PEER_AUTH_FAILED;
677 * The peer has been successfully authenticated using `protocol'.
680 auth_peer_success(unit, protocol, prot_flavor, name, namelen)
681 int unit, protocol, prot_flavor;
690 switch (prot_flavor) {
691 case CHAP_DIGEST_MD5:
692 bit |= CHAP_MD5_PEER;
698 case CHAP_MICROSOFT_V2:
699 bit |= CHAP_MS2_PEER;
708 warn("auth_peer_success: unknown protocol %x", protocol);
713 * Save the authenticated name of the peer for later.
715 if (namelen > sizeof(peer_authname) - 1)
716 namelen = sizeof(peer_authname) - 1;
717 BCOPY(name, peer_authname, namelen);
718 peer_authname[namelen] = 0;
719 script_setenv("PEERNAME", peer_authname, 0);
721 /* Save the authentication method for later. */
722 auth_done[unit] |= bit;
725 * If there is no more authentication still to be done,
726 * proceed to the network (or callback) phase.
728 if ((auth_pending[unit] &= ~bit) == 0)
733 * We have failed to authenticate ourselves to the peer using `protocol'.
736 auth_withpeer_fail(unit, protocol)
739 if (passwd_from_file)
740 BZERO(passwd, MAXSECRETLEN);
742 * We've failed to authenticate ourselves to our peer.
743 * Some servers keep sending CHAP challenges, but there
744 * is no point in persisting without any way to get updated
745 * authentication secrets.
747 lcp_close(unit, "Failed to authenticate ourselves to peer");
748 status = EXIT_AUTH_TOPEER_FAILED;
752 * We have successfully authenticated ourselves with the peer using `protocol'.
755 auth_withpeer_success(unit, protocol, prot_flavor)
756 int unit, protocol, prot_flavor;
763 switch (prot_flavor) {
764 case CHAP_DIGEST_MD5:
765 bit |= CHAP_MD5_WITHPEER;
769 bit |= CHAP_MS_WITHPEER;
771 case CHAP_MICROSOFT_V2:
772 bit |= CHAP_MS2_WITHPEER;
778 if (passwd_from_file)
779 BZERO(passwd, MAXSECRETLEN);
783 warn("auth_withpeer_success: unknown protocol %x", protocol);
787 /* Save the authentication method for later. */
788 auth_done[unit] |= bit;
791 * If there is no more authentication still being done,
792 * proceed to the network (or callback) phase.
794 if ((auth_pending[unit] &= ~bit) == 0)
800 * np_up - a network protocol has come up.
808 if (num_np_up == 0) {
810 * At this point we consider that the link has come up successfully.
814 new_phase(PHASE_RUNNING);
816 if (idle_time_hook != 0)
817 tlim = (*idle_time_hook)(NULL);
819 tlim = idle_time_limit;
821 TIMEOUT(check_idle, NULL, tlim);
824 * Set a timeout to close the connection once the maximum
825 * connect time has expired.
828 TIMEOUT(connect_time_expired, 0, maxconnect);
831 * Detach now, if the updetach option was given.
833 if (updetach && !nodetach)
840 * np_down - a network protocol has gone down.
846 if (--num_np_up == 0) {
847 UNTIMEOUT(check_idle, NULL);
848 UNTIMEOUT(connect_time_expired, NULL);
849 new_phase(PHASE_NETWORK);
854 * np_finished - a network protocol has finished using the link.
857 np_finished(unit, proto)
860 if (--num_np_open <= 0) {
861 /* no further use for the link: shut up shop. */
862 lcp_close(0, "No network protocols running");
867 * check_idle - check whether the link has been idle for long
868 * enough that we can shut it down.
874 struct ppp_idle idle;
878 if (!get_idle_time(0, &idle))
880 if (idle_time_hook != 0) {
881 tlim = idle_time_hook(&idle);
883 itime = MIN(idle.xmit_idle, idle.recv_idle);
884 tlim = idle_time_limit - itime;
887 /* link is idle: shut it down. */
888 notice("Terminating connection due to lack of activity.");
889 lcp_close(0, "Link inactive");
891 status = EXIT_IDLE_TIMEOUT;
893 TIMEOUT(check_idle, NULL, tlim);
898 * connect_time_expired - log a message and close the connection.
901 connect_time_expired(arg)
904 info("Connect time expired");
905 lcp_close(0, "Connect time expired"); /* Close connection */
906 status = EXIT_CONNECT_TIME;
910 * auth_check_options - called to check authentication options.
915 lcp_options *wo = &lcp_wantoptions[0];
919 /* Default our_name to hostname, and user to our_name */
920 if (our_name[0] == 0 || usehostname)
921 strlcpy(our_name, hostname, sizeof(our_name));
923 strlcpy(user, our_name, sizeof(user));
926 * If we have a default route, require the peer to authenticate
927 * unless the noauth option was given or the real user is root.
929 if (!auth_required && !allow_any_ip && have_route_to(0) && !privileged) {
934 /* If authentication is required, ask peer for CHAP or PAP. */
937 if (!wo->neg_chap && !wo->neg_upap) {
938 wo->neg_chap = 1; wo->chap_mdtype = MDTYPE_ALL;
942 wo->neg_chap = 0; wo->chap_mdtype = MDTYPE_NONE;
947 * Check whether we have appropriate secrets to use
948 * to authenticate the peer.
951 can_auth = wo->neg_upap && (uselogin || have_pap_secret(&lacks_ip));
952 if (!can_auth && (wo->neg_chap)) {
953 can_auth = have_chap_secret((explicit_remote? remote_name: NULL),
954 our_name, 1, &lacks_ip);
957 if (auth_required && !can_auth && noauth_addrs == NULL) {
960 "By default the remote system is required to authenticate itself");
962 "(because this system has a default route to the internet)");
963 } else if (explicit_remote)
965 "The remote system (%s) is required to authenticate itself",
969 "The remote system is required to authenticate itself");
971 "but I couldn't find any suitable secret (password) for it to use to do so.");
974 "(None of the available passwords would let it use an IP address.)");
981 * auth_reset - called when LCP is starting negotiations to recheck
982 * authentication options, i.e. whether we have appropriate secrets
983 * to use for authenticating ourselves and/or the peer.
989 lcp_options *go = &lcp_gotoptions[unit];
990 lcp_options *ao = &lcp_allowoptions[0];
992 ao->neg_upap = !refuse_pap && (passwd[0] != 0 || get_pap_passwd(NULL));
993 ao->neg_chap = (!refuse_chap || !refuse_mschap || !refuse_mschap_v2)
995 || have_chap_secret(user, (explicit_remote? remote_name: NULL),
998 if (go->neg_upap && !uselogin && !have_pap_secret(NULL))
1001 if (!have_chap_secret((explicit_remote? remote_name: NULL),
1009 * check_passwd - Check the user name and passwd against the PAP secrets
1010 * file. If requested, also check against the system password database,
1011 * and login the user if OK.
1014 * UPAP_AUTHNAK: Authentication failed.
1015 * UPAP_AUTHACK: Authentication succeeded.
1016 * In either case, msg points to an appropriate message.
1019 check_passwd(unit, auser, userlen, apasswd, passwdlen, msg)
1030 struct wordlist *addrs = NULL, *opts = NULL;
1031 char passwd[256], user[256];
1032 char secret[MAXWORDLEN];
1033 static int attempts = 0;
1036 * Make copies of apasswd and auser, then null-terminate them.
1037 * If there are unprintable characters in the password, make
1040 slprintf(passwd, sizeof(passwd), "%.*v", passwdlen, apasswd);
1041 slprintf(user, sizeof(user), "%.*v", userlen, auser);
1045 * Check if a plugin wants to handle this.
1047 if (pap_auth_hook) {
1048 ret = (*pap_auth_hook)(user, passwd, msg, &addrs, &opts);
1051 set_allowed_addrs(unit, addrs, opts);
1052 BZERO(passwd, sizeof(passwd));
1054 free_wordlist(addrs);
1056 free_wordlist(opts);
1058 return ret? UPAP_AUTHACK: UPAP_AUTHNAK;
1063 * Open the file of pap secrets and scan for a suitable secret
1064 * for authenticating this user.
1066 filename = _PATH_UPAPFILE;
1067 addrs = opts = NULL;
1069 f = fopen(filename, "r");
1071 error("Can't open PAP password file %s: %m", filename);
1074 check_access(f, filename);
1075 if (scan_authfile(f, user, our_name, secret, &addrs, &opts, filename) < 0) {
1076 warn("no PAP secret found for %s", user);
1079 * If the secret is "@login", it means to check
1080 * the password against the login database.
1082 int login_secret = strcmp(secret, "@login") == 0;
1084 if (uselogin || login_secret) {
1085 /* login option or secret is @login */
1086 ret = plogin(user, passwd, msg);
1087 if (ret == UPAP_AUTHNAK)
1088 warn("PAP login failure for %s", user);
1092 if (secret[0] != 0 && !login_secret) {
1093 /* password given in pap-secrets - must match */
1094 if ((cryptpap || strcmp(passwd, secret) != 0)
1095 && strcmp(crypt(passwd, secret), secret) != 0) {
1097 warn("PAP authentication failure for %s", user);
1104 if (ret == UPAP_AUTHNAK) {
1106 *msg = "Login incorrect";
1108 * XXX can we ever get here more than once??
1109 * Frustrate passwd stealer programs.
1110 * Allow 10 tries, but start backing off after 3 (stolen from login).
1111 * On 10'th, drop the connection.
1113 if (attempts++ >= 10) {
1114 warn("%d LOGIN FAILURES ON %s, %s", attempts, devnam, user);
1115 lcp_close(unit, "login failed");
1118 sleep((u_int) (attempts - 3) * 5);
1120 free_wordlist(opts);
1123 attempts = 0; /* Reset count */
1126 set_allowed_addrs(unit, addrs, opts);
1130 free_wordlist(addrs);
1131 BZERO(passwd, sizeof(passwd));
1132 BZERO(secret, sizeof(secret));
1138 * This function is needed for PAM.
1142 /* Static variables used to communicate between the conversation function
1143 * and the server_login function
1145 static char *PAM_username;
1146 static char *PAM_password;
1147 static int PAM_error = 0;
1148 static pam_handle_t *pamh = NULL;
1150 /* PAM conversation function
1151 * Here we assume (for now, at least) that echo on means login name, and
1152 * echo off means password.
1155 static int PAM_conv (int num_msg, const struct pam_message **msg,
1156 struct pam_response **resp, void *appdata_ptr)
1159 struct pam_response *reply = NULL;
1161 #define COPY_STRING(s) (s) ? strdup(s) : NULL
1163 reply = malloc(sizeof(struct pam_response) * num_msg);
1164 if (!reply) return PAM_CONV_ERR;
1166 for (replies = 0; replies < num_msg; replies++) {
1167 switch (msg[replies]->msg_style) {
1168 case PAM_PROMPT_ECHO_ON:
1169 reply[replies].resp_retcode = PAM_SUCCESS;
1170 reply[replies].resp = COPY_STRING(PAM_username);
1171 /* PAM frees resp */
1173 case PAM_PROMPT_ECHO_OFF:
1174 reply[replies].resp_retcode = PAM_SUCCESS;
1175 reply[replies].resp = COPY_STRING(PAM_password);
1176 /* PAM frees resp */
1181 /* ignore it, but pam still wants a NULL response... */
1182 reply[replies].resp_retcode = PAM_SUCCESS;
1183 reply[replies].resp = NULL;
1186 /* Must be an error of some sort... */
1189 return PAM_CONV_ERR;
1196 static struct pam_conv PAM_conversation = {
1200 #endif /* USE_PAM */
1203 * plogin - Check the user name and password against the system
1204 * password database, and login the user if OK.
1207 * UPAP_AUTHNAK: Login failed.
1208 * UPAP_AUTHACK: Login succeeded.
1209 * In either case, msg points to an appropriate message.
1213 plogin(user, passwd, msg)
1223 pam_error = pam_start ("ppp", user, &PAM_conversation, &pamh);
1224 if (pam_error != PAM_SUCCESS) {
1225 *msg = (char *) pam_strerror (pamh, pam_error);
1227 return UPAP_AUTHNAK;
1230 * Define the fields for the credential validation
1233 PAM_username = user;
1234 PAM_password = passwd;
1236 pam_set_item (pamh, PAM_TTY, devnam); /* this might be useful to some modules */
1241 pam_error = pam_authenticate (pamh, PAM_SILENT);
1242 if (pam_error == PAM_SUCCESS && !PAM_error) {
1243 pam_error = pam_acct_mgmt (pamh, PAM_SILENT);
1244 if (pam_error == PAM_SUCCESS)
1245 pam_error = pam_open_session (pamh, PAM_SILENT);
1248 *msg = (char *) pam_strerror (pamh, pam_error);
1253 reopen_log(); /* apparently the PAM stuff does closelog() */
1254 PAM_username = NULL;
1255 PAM_password = NULL;
1256 if (pam_error != PAM_SUCCESS)
1257 return UPAP_AUTHNAK;
1258 #else /* #ifdef USE_PAM */
1261 * Use the non-PAM methods directly
1266 struct spwd *getspnam();
1268 struct passwd *pw = getpwnam(user);
1272 return (UPAP_AUTHNAK);
1275 spwd = getspnam(user);
1278 /* check the age of the password entry */
1279 long now = time(NULL) / 86400L;
1281 if ((spwd->sp_expire > 0 && now >= spwd->sp_expire)
1282 || ((spwd->sp_max >= 0 && spwd->sp_max < 10000)
1283 && spwd->sp_lstchg >= 0
1284 && now >= spwd->sp_lstchg + spwd->sp_max)) {
1285 warn("Password for %s has expired", user);
1286 return (UPAP_AUTHNAK);
1288 pw->pw_passwd = spwd->sp_pwdp;
1293 * If no passwd, don't let them login.
1295 if (pw->pw_passwd == NULL || strlen(pw->pw_passwd) < 2
1296 || strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd) != 0)
1297 return (UPAP_AUTHNAK);
1299 #endif /* #ifdef USE_PAM */
1302 * Write a wtmp entry for this user.
1306 if (strncmp(tty, "/dev/", 5) == 0)
1308 logwtmp(tty, user, remote_name); /* Add wtmp login entry */
1310 #if defined(_PATH_LASTLOG) && !defined(USE_PAM)
1311 if (pw != (struct passwd *)NULL) {
1315 if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
1316 (void)lseek(fd, (off_t)(pw->pw_uid * sizeof(ll)), SEEK_SET);
1317 memset((void *)&ll, 0, sizeof(ll));
1318 (void)time(&ll.ll_time);
1319 (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
1320 (void)write(fd, (char *)&ll, sizeof(ll));
1324 #endif /* _PATH_LASTLOG and not USE_PAM */
1326 info("user %s logged in", user);
1329 return (UPAP_AUTHACK);
1333 * plogout - Logout the user.
1342 pam_error = pam_close_session (pamh, PAM_SILENT);
1343 pam_end (pamh, pam_error);
1346 /* Apparently the pam stuff does closelog(). */
1348 #else /* ! USE_PAM */
1352 if (strncmp(tty, "/dev/", 5) == 0)
1354 logwtmp(tty, "", ""); /* Wipe out utmp logout entry */
1355 #endif /* ! USE_PAM */
1361 * null_login - Check if a username of "" and a password of "" are
1362 * acceptable, and iff so, set the list of acceptable IP addresses
1372 struct wordlist *addrs, *opts;
1373 char secret[MAXWORDLEN];
1376 * Check if a plugin wants to handle this.
1380 ret = (*null_auth_hook)(&addrs, &opts);
1383 * Open the file of pap secrets and scan for a suitable secret.
1386 filename = _PATH_UPAPFILE;
1388 f = fopen(filename, "r");
1391 check_access(f, filename);
1393 i = scan_authfile(f, "", our_name, secret, &addrs, &opts, filename);
1394 ret = i >= 0 && secret[0] == 0;
1395 BZERO(secret, sizeof(secret));
1400 set_allowed_addrs(unit, addrs, opts);
1402 free_wordlist(opts);
1404 free_wordlist(addrs);
1411 * get_pap_passwd - get a password for authenticating ourselves with
1412 * our peer using PAP. Returns 1 on success, 0 if no suitable password
1414 * Assumes passwd points to MAXSECRETLEN bytes of space (if non-null).
1417 get_pap_passwd(passwd)
1423 char secret[MAXWORDLEN];
1426 * Check whether a plugin wants to supply this.
1428 if (pap_passwd_hook) {
1429 ret = (*pap_passwd_hook)(user, passwd);
1434 filename = _PATH_UPAPFILE;
1435 f = fopen(filename, "r");
1438 check_access(f, filename);
1439 ret = scan_authfile(f, user,
1440 (remote_name[0]? remote_name: NULL),
1441 secret, NULL, NULL, filename);
1446 strlcpy(passwd, secret, MAXSECRETLEN);
1447 BZERO(secret, sizeof(secret));
1453 * have_pap_secret - check whether we have a PAP file with any
1454 * secrets that we could possibly use for authenticating the peer.
1457 have_pap_secret(lacks_ipp)
1463 struct wordlist *addrs;
1465 /* let the plugin decide, if there is one */
1466 if (pap_check_hook) {
1467 ret = (*pap_check_hook)();
1472 filename = _PATH_UPAPFILE;
1473 f = fopen(filename, "r");
1477 ret = scan_authfile(f, (explicit_remote? remote_name: NULL), our_name,
1478 NULL, &addrs, NULL, filename);
1480 if (ret >= 0 && !some_ip_ok(addrs)) {
1486 free_wordlist(addrs);
1493 * have_chap_secret - check whether we have a CHAP file with a
1494 * secret that we could possibly use for authenticating `client'
1495 * on `server'. Either can be the null string, meaning we don't
1496 * know the identity yet.
1499 have_chap_secret(client, server, need_ip, lacks_ipp)
1508 struct wordlist *addrs;
1510 if (chap_check_hook) {
1511 ret = (*chap_check_hook)();
1517 filename = _PATH_CHAPFILE;
1518 f = fopen(filename, "r");
1522 if (client != NULL && client[0] == 0)
1524 else if (server != NULL && server[0] == 0)
1527 ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename);
1529 if (ret >= 0 && need_ip && !some_ip_ok(addrs)) {
1535 free_wordlist(addrs);
1542 * get_secret - open the CHAP secret file and return the secret
1543 * for authenticating the given client on the given server.
1544 * (We could be either client or server).
1547 get_secret(unit, client, server, secret, secret_len, am_server)
1558 struct wordlist *addrs, *opts;
1559 char secbuf[MAXWORDLEN];
1561 if (!am_server && passwd[0] != 0) {
1562 strlcpy(secbuf, passwd, sizeof(secbuf));
1563 } else if (!am_server && chap_passwd_hook) {
1564 if ( (*chap_passwd_hook)(client, secbuf) < 0) {
1565 error("Unable to obtain CHAP password for %s on %s from plugin",
1570 filename = _PATH_CHAPFILE;
1574 f = fopen(filename, "r");
1576 error("Can't open chap secret file %s: %m", filename);
1579 check_access(f, filename);
1581 ret = scan_authfile(f, client, server, secbuf, &addrs, &opts, filename);
1587 set_allowed_addrs(unit, addrs, opts);
1589 free_wordlist(opts);
1591 free_wordlist(addrs);
1594 len = strlen(secbuf);
1595 if (len > MAXSECRETLEN) {
1596 error("Secret for %s on %s is too long", client, server);
1599 BCOPY(secbuf, secret, len);
1600 BZERO(secbuf, sizeof(secbuf));
1607 * set_allowed_addrs() - set the list of allowed addresses.
1608 * Also looks for `--' indicating options to apply for this peer
1609 * and leaves the following words in extra_options.
1612 set_allowed_addrs(unit, addrs, opts)
1614 struct wordlist *addrs;
1615 struct wordlist *opts;
1618 struct wordlist *ap, **plink;
1619 struct permitted_ip *ip;
1620 char *ptr_word, *ptr_mask;
1623 u_int32_t a, mask, ah, offset;
1624 struct ipcp_options *wo = &ipcp_wantoptions[unit];
1625 u_int32_t suggested_ip = 0;
1627 if (addresses[unit] != NULL)
1628 free(addresses[unit]);
1629 addresses[unit] = NULL;
1630 if (extra_options != NULL)
1631 free_wordlist(extra_options);
1632 extra_options = opts;
1635 * Count the number of IP addresses given.
1637 n = wordlist_count(addrs) + wordlist_count(noauth_addrs);
1640 ip = (struct permitted_ip *) malloc((n + 1) * sizeof(struct permitted_ip));
1644 /* temporarily append the noauth_addrs list to addrs */
1645 for (plink = &addrs; *plink != NULL; plink = &(*plink)->next)
1647 *plink = noauth_addrs;
1650 for (ap = addrs; ap != NULL; ap = ap->next) {
1651 /* "-" means no addresses authorized, "*" means any address allowed */
1652 ptr_word = ap->word;
1653 if (strcmp(ptr_word, "-") == 0)
1655 if (strcmp(ptr_word, "*") == 0) {
1657 ip[n].base = ip[n].mask = 0;
1663 if (*ptr_word == '!') {
1668 mask = ~ (u_int32_t) 0;
1670 ptr_mask = strchr (ptr_word, '/');
1671 if (ptr_mask != NULL) {
1675 bit_count = (int) strtol (ptr_mask+1, &endp, 10);
1676 if (bit_count <= 0 || bit_count > 32) {
1677 warn("invalid address length %v in auth. address list",
1681 bit_count = 32 - bit_count; /* # bits in host part */
1683 offset = ifunit + 1;
1687 warn("invalid address length syntax: %v", ptr_mask+1);
1694 hp = gethostbyname(ptr_word);
1695 if (hp != NULL && hp->h_addrtype == AF_INET) {
1696 a = *(u_int32_t *)hp->h_addr;
1698 np = getnetbyname (ptr_word);
1699 if (np != NULL && np->n_addrtype == AF_INET) {
1700 a = htonl (*(u_int32_t *)np->n_net);
1701 if (ptr_mask == NULL) {
1702 /* calculate appropriate mask for net */
1705 mask = IN_CLASSA_NET;
1706 else if (IN_CLASSB(ah))
1707 mask = IN_CLASSB_NET;
1708 else if (IN_CLASSC(ah))
1709 mask = IN_CLASSC_NET;
1712 a = inet_addr (ptr_word);
1716 if (ptr_mask != NULL)
1719 if (a == (u_int32_t)-1L) {
1720 warn("unknown host %s in auth. address list", ap->word);
1724 if (offset >= ~mask) {
1725 warn("interface unit %d too large for subnet %v",
1729 a = htonl((ntohl(a) & mask) + offset);
1730 mask = ~(u_int32_t)0;
1732 ip[n].mask = htonl(mask);
1733 ip[n].base = a & ip[n].mask;
1735 if (~mask == 0 && suggested_ip == 0)
1740 ip[n].permit = 0; /* make the last entry forbid all addresses */
1741 ip[n].base = 0; /* to terminate the list */
1744 addresses[unit] = ip;
1747 * If the address given for the peer isn't authorized, or if
1748 * the user hasn't given one, AND there is an authorized address
1749 * which is a single host, then use that if we find one.
1751 if (suggested_ip != 0
1752 && (wo->hisaddr == 0 || !auth_ip_addr(unit, wo->hisaddr))) {
1753 wo->hisaddr = suggested_ip;
1755 * Do we insist on this address? No, if there are other
1756 * addresses authorized than the suggested one.
1759 wo->accept_remote = 1;
1764 * auth_ip_addr - check whether the peer is authorized to use
1765 * a given IP address. Returns 1 if authorized, 0 otherwise.
1768 auth_ip_addr(unit, addr)
1774 /* don't allow loopback or multicast address */
1775 if (bad_ip_adrs(addr))
1778 if (allowed_address_hook) {
1779 ok = allowed_address_hook(addr);
1780 if (ok >= 0) return ok;
1783 if (addresses[unit] != NULL) {
1784 ok = ip_addr_check(addr, addresses[unit]);
1790 return 0; /* no addresses authorized */
1791 return allow_any_ip || privileged || !have_route_to(addr);
1795 ip_addr_check(addr, addrs)
1797 struct permitted_ip *addrs;
1800 if ((addr & addrs->mask) == addrs->base)
1801 return addrs->permit;
1805 * bad_ip_adrs - return 1 if the IP address is one we don't want
1806 * to use, such as an address in the loopback net or a multicast address.
1807 * addr is in network byte order.
1814 return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
1815 || IN_MULTICAST(addr) || IN_BADCLASS(addr);
1819 * some_ip_ok - check a wordlist to see if it authorizes any
1824 struct wordlist *addrs;
1826 for (; addrs != 0; addrs = addrs->next) {
1827 if (addrs->word[0] == '-')
1829 if (addrs->word[0] != '!')
1830 return 1; /* some IP address is allowed */
1836 * check_access - complain if a secret file has too-liberal permissions.
1839 check_access(f, filename)
1845 if (fstat(fileno(f), &sbuf) < 0) {
1846 warn("cannot stat secret file %s: %m", filename);
1847 } else if ((sbuf.st_mode & (S_IRWXG | S_IRWXO)) != 0) {
1848 warn("Warning - secret file %s has world and/or group access",
1855 * scan_authfile - Scan an authorization file for a secret suitable
1856 * for authenticating `client' on `server'. The return value is -1
1857 * if no secret is found, otherwise >= 0. The return value has
1858 * NONWILD_CLIENT set if the secret didn't have "*" for the client, and
1859 * NONWILD_SERVER set if the secret didn't have "*" for the server.
1860 * Any following words on the line up to a "--" (i.e. address authorization
1861 * info) are placed in a wordlist and returned in *addrs. Any
1862 * following words (extra options) are placed in a wordlist and
1863 * returned in *opts.
1864 * We assume secret is NULL or points to MAXWORDLEN bytes of space.
1867 scan_authfile(f, client, server, secret, addrs, opts, filename)
1872 struct wordlist **addrs;
1873 struct wordlist **opts;
1877 int got_flag, best_flag;
1879 struct wordlist *ap, *addr_list, *alist, **app;
1880 char word[MAXWORDLEN];
1881 char atfile[MAXWORDLEN];
1882 char lsecret[MAXWORDLEN];
1889 if (!getword(f, word, &newline, filename))
1890 return -1; /* file is empty??? */
1895 * Skip until we find a word at the start of a line.
1897 while (!newline && getword(f, word, &newline, filename))
1900 break; /* got to end of file */
1903 * Got a client - check if it's a match or a wildcard.
1906 if (client != NULL && strcmp(word, client) != 0 && !ISWILD(word)) {
1911 got_flag = NONWILD_CLIENT;
1914 * Now get a server and check if it matches.
1916 if (!getword(f, word, &newline, filename))
1920 if (!ISWILD(word)) {
1921 if (server != NULL && strcmp(word, server) != 0)
1923 got_flag |= NONWILD_SERVER;
1927 * Got some sort of a match - see if it's better than what
1930 if (got_flag <= best_flag)
1936 if (!getword(f, word, &newline, filename))
1941 if (secret != NULL) {
1943 * Special syntax: @/pathname means read secret from file.
1945 if (word[0] == '@' && word[1] == '/') {
1946 strlcpy(atfile, word+1, sizeof(atfile));
1947 if ((sf = fopen(atfile, "r")) == NULL) {
1948 warn("can't open indirect secret file %s", atfile);
1951 check_access(sf, atfile);
1952 if (!getword(sf, word, &xxx, atfile)) {
1953 warn("no secret in indirect secret file %s", atfile);
1959 strlcpy(lsecret, word, sizeof(lsecret));
1963 * Now read address authorization info and make a wordlist.
1967 if (!getword(f, word, &newline, filename) || newline)
1969 ap = (struct wordlist *)
1970 malloc(sizeof(struct wordlist) + strlen(word) + 1);
1972 novm("authorized addresses");
1973 ap->word = (char *) (ap + 1);
1974 strcpy(ap->word, word);
1981 * This is the best so far; remember it.
1983 best_flag = got_flag;
1985 free_wordlist(addr_list);
1988 strlcpy(secret, lsecret, MAXWORDLEN);
1994 /* scan for a -- word indicating the start of options */
1995 for (app = &addr_list; (ap = *app) != NULL; app = &ap->next)
1996 if (strcmp(ap->word, "--") == 0)
1998 /* ap = start of options */
2000 ap = ap->next; /* first option */
2001 free(*app); /* free the "--" word */
2002 *app = NULL; /* terminate addr list */
2006 else if (ap != NULL)
2010 else if (addr_list != NULL)
2011 free_wordlist(addr_list);
2017 * wordlist_count - return the number of items in a wordlist
2021 struct wordlist *wp;
2025 for (n = 0; wp != NULL; wp = wp->next)
2031 * free_wordlist - release memory allocated for a wordlist.
2035 struct wordlist *wp;
2037 struct wordlist *next;
2039 while (wp != NULL) {
2047 * auth_script_done - called when the auth-up or auth-down script
2051 auth_script_done(arg)
2054 auth_script_pid = 0;
2055 switch (auth_script_state) {
2057 if (auth_state == s_down) {
2058 auth_script_state = s_down;
2059 auth_script(_PATH_AUTHDOWN);
2063 if (auth_state == s_up) {
2064 auth_script_state = s_up;
2065 auth_script(_PATH_AUTHUP);
2072 * auth_script - execute a script with arguments
2073 * interface-name peer-name real-user tty speed
2085 if ((pw = getpwuid(getuid())) != NULL && pw->pw_name != NULL)
2086 user_name = pw->pw_name;
2088 slprintf(struid, sizeof(struid), "%d", getuid());
2091 slprintf(strspeed, sizeof(strspeed), "%d", baud_rate);
2095 argv[2] = peer_authname;
2096 argv[3] = user_name;
2101 auth_script_pid = run_program(script, argv, 0, auth_script_done, NULL);