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 1.76 2002/04/02 13:54:59 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
78 #include "pathnames.h"
80 static const char rcsid[] = RCSID;
82 /* Bits in scan_authfile return value */
83 #define NONWILD_SERVER 1
84 #define NONWILD_CLIENT 2
86 #define ISWILD(word) (word[0] == '*' && word[1] == 0)
88 /* The name by which the peer authenticated itself to us. */
89 char peer_authname[MAXNAMELEN];
91 /* Records which authentication operations haven't completed yet. */
92 static int auth_pending[NUM_PPP];
94 /* Records which authentication operations have been completed. */
95 int auth_done[NUM_PPP];
97 /* Set if we have successfully called plogin() */
100 /* List of addresses which the peer may use. */
101 static struct permitted_ip *addresses[NUM_PPP];
103 /* Wordlist giving addresses which the peer may use
104 without authenticating itself. */
105 static struct wordlist *noauth_addrs;
107 /* Extra options to apply, from the secrets file entry for the peer. */
108 static struct wordlist *extra_options;
110 /* Number of network protocols which we have opened. */
111 static int num_np_open;
113 /* Number of network protocols which have come up. */
114 static int num_np_up;
116 /* Set if we got the contents of passwd[] from the pap-secrets file. */
117 static int passwd_from_file;
119 /* Set if we require authentication only because we have a default route. */
120 static bool default_auth;
122 /* Hook to enable a plugin to control the idle time limit */
123 int (*idle_time_hook) __P((struct ppp_idle *)) = NULL;
125 /* Hook for a plugin to say whether we can possibly authenticate any peer */
126 int (*pap_check_hook) __P((void)) = NULL;
128 /* Hook for a plugin to check the PAP user and password */
129 int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
130 struct wordlist **paddrs,
131 struct wordlist **popts)) = NULL;
133 /* Hook for a plugin to know about the PAP user logout */
134 void (*pap_logout_hook) __P((void)) = NULL;
136 /* Hook for a plugin to get the PAP password for authenticating us */
137 int (*pap_passwd_hook) __P((char *user, char *passwd)) = NULL;
139 /* Hook for a plugin to say whether it is OK if the peer
140 refuses to authenticate. */
141 int (*null_auth_hook) __P((struct wordlist **paddrs,
142 struct wordlist **popts)) = NULL;
144 int (*allowed_address_hook) __P((u_int32_t addr)) = NULL;
146 /* A notifier for when the peer has authenticated itself,
147 and we are proceeding to the network phase. */
148 struct notifier *auth_up_notifier = NULL;
150 /* A notifier for when the link goes down. */
151 struct notifier *link_down_notifier = NULL;
154 * This is used to ensure that we don't start an auth-up/down
155 * script while one is already running.
162 static enum script_state auth_state = s_down;
163 static enum script_state auth_script_state = s_down;
164 static pid_t auth_script_pid = 0;
166 static int used_login; /* peer authenticated against login database */
171 bool uselogin = 0; /* Use /etc/passwd for checking PAP */
172 bool cryptpap = 0; /* Passwords in pap-secrets are encrypted */
173 bool refuse_pap = 0; /* Don't wanna auth. ourselves with PAP */
174 bool refuse_chap = 0; /* Don't wanna auth. ourselves with CHAP */
176 bool refuse_mschap = 0; /* Don't wanna auth. ourselves with MS-CHAP */
177 bool refuse_mschap_v2 = 0; /* Don't wanna auth. ourselves with MS-CHAPv2 */
179 bool refuse_mschap = 1; /* Don't wanna auth. ourselves with MS-CHAP */
180 bool refuse_mschap_v2 = 1; /* Don't wanna auth. ourselves with MS-CHAPv2 */
182 bool usehostname = 0; /* Use hostname for our_name */
183 bool auth_required = 0; /* Always require authentication from peer */
184 bool allow_any_ip = 0; /* Allow peer to use any IP address */
185 bool explicit_remote = 0; /* User specified explicit remote name */
186 char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
188 static char *uafname; /* name of most recent +ua file */
190 extern char *crypt __P((const char *, const char *));
192 /* Prototypes for procedures local to this file. */
194 static void network_phase __P((int));
195 static void check_idle __P((void *));
196 static void connect_time_expired __P((void *));
197 static int plogin __P((char *, char *, char **));
198 static void plogout __P((void));
199 static int null_login __P((int));
200 static int get_pap_passwd __P((char *));
201 static int have_pap_secret __P((int *));
202 static int have_chap_secret __P((char *, char *, int, int *));
203 static int ip_addr_check __P((u_int32_t, struct permitted_ip *));
204 static int scan_authfile __P((FILE *, char *, char *, char *,
205 struct wordlist **, struct wordlist **,
207 static void free_wordlist __P((struct wordlist *));
208 static void auth_script __P((char *));
209 static void auth_script_done __P((void *));
210 static void set_allowed_addrs __P((int, struct wordlist *, struct wordlist *));
211 static int some_ip_ok __P((struct wordlist *));
212 static int setupapfile __P((char **));
213 static int privgroup __P((char **));
214 static int set_noauth_addr __P((char **));
215 static void check_access __P((FILE *, char *));
216 static int wordlist_count __P((struct wordlist *));
219 * Authentication-related options.
221 option_t auth_options[] = {
222 { "auth", o_bool, &auth_required,
223 "Require authentication from peer", OPT_PRIO | 1 },
224 { "noauth", o_bool, &auth_required,
225 "Don't require peer to authenticate", OPT_PRIOSUB | OPT_PRIV | OPT_A2COPY,
227 { "require-pap", o_bool, &lcp_wantoptions[0].neg_upap,
228 "Require PAP authentication from peer",
229 OPT_PRIOSUB | OPT_A2COPY | 1, &auth_required },
230 { "+pap", o_bool, &lcp_wantoptions[0].neg_upap,
231 "Require PAP authentication from peer",
232 OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | 1, &auth_required },
233 { "require-chap", o_bool, &lcp_wantoptions[0].neg_chap,
234 "Require CHAP authentication from peer",
235 OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MD5,
236 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
237 { "+chap", o_bool, &lcp_wantoptions[0].neg_chap,
238 "Require CHAP authentication from peer",
239 OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MD5,
240 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
242 { "require-mschap", o_bool, &lcp_wantoptions[0].neg_chap,
243 "Require MS-CHAP authentication from peer",
244 OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT,
245 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
246 { "+mschap", o_bool, &lcp_wantoptions[0].neg_chap,
247 "Require MS-CHAP authentication from peer",
248 OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT,
249 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
250 { "require-mschap-v2", o_bool, &lcp_wantoptions[0].neg_chap,
251 "Require MS-CHAPv2 authentication from peer",
252 OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT_V2,
253 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
254 { "+mschap-v2", o_bool, &lcp_wantoptions[0].neg_chap,
255 "Require MS-CHAPv2 authentication from peer",
256 OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT_V2,
257 &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
260 { "refuse-pap", o_bool, &refuse_pap,
261 "Don't agree to auth to peer with PAP", 1 },
262 { "-pap", o_bool, &refuse_pap,
263 "Don't allow PAP authentication with peer", OPT_ALIAS | 1 },
264 { "refuse-chap", o_bool, &refuse_chap,
265 "Don't agree to auth to peer with CHAP", OPT_A2CLRB | MDTYPE_MD5,
266 &lcp_allowoptions[0].chap_mdtype },
267 { "-chap", o_bool, &refuse_chap,
268 "Don't allow CHAP authentication with peer",
269 OPT_ALIAS | OPT_A2CLRB | MDTYPE_MD5,
270 &lcp_allowoptions[0].chap_mdtype },
272 { "refuse-mschap", o_bool, &refuse_mschap,
273 "Don't agree to auth to peer with MS-CHAP",
274 OPT_A2CLRB | MDTYPE_MICROSOFT, &lcp_allowoptions[0].chap_mdtype },
275 { "-mschap", o_bool, &refuse_mschap,
276 "Don't allow MS-CHAP authentication with peer",
277 OPT_ALIAS | OPT_A2CLRB | MDTYPE_MICROSOFT,
278 &lcp_allowoptions[0].chap_mdtype },
279 { "refuse-mschap-v2", o_bool, &refuse_mschap_v2,
280 "Don't agree to auth to peer with MS-CHAPv2",
281 OPT_A2CLRB | MDTYPE_MICROSOFT_V2, &lcp_allowoptions[0].chap_mdtype },
282 { "-mschap-v2", o_bool, &refuse_mschap_v2,
283 "Don't allow MS-CHAPv2 authentication with peer",
284 OPT_ALIAS | OPT_A2CLRB | MDTYPE_MICROSOFT_V2,
285 &lcp_allowoptions[0].chap_mdtype },
288 { "name", o_string, our_name,
289 "Set local name for authentication",
290 OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXNAMELEN },
292 { "+ua", o_special, (void *)setupapfile,
293 "Get PAP user and password from file",
294 OPT_PRIO | OPT_A2STRVAL, &uafname },
296 { "user", o_string, user,
297 "Set name for auth with peer", OPT_PRIO | OPT_STATIC, NULL, MAXNAMELEN },
299 { "password", o_string, passwd,
300 "Password for authenticating us to the peer",
301 OPT_PRIO | OPT_STATIC | OPT_HIDE, NULL, MAXSECRETLEN },
303 { "usehostname", o_bool, &usehostname,
304 "Must use hostname for authentication", 1 },
306 { "remotename", o_string, remote_name,
307 "Set remote name for authentication", OPT_PRIO | OPT_STATIC,
308 &explicit_remote, MAXNAMELEN },
310 { "login", o_bool, &uselogin,
311 "Use system password database for PAP", 1 },
313 { "papcrypt", o_bool, &cryptpap,
314 "PAP passwords are encrypted", 1 },
316 { "privgroup", o_special, (void *)privgroup,
317 "Allow group members to use privileged options", OPT_PRIV | OPT_A2LIST },
319 { "allow-ip", o_special, (void *)set_noauth_addr,
320 "Set IP address(es) which can be used without authentication",
321 OPT_PRIV | OPT_A2LIST },
327 * setupapfile - specifies UPAP info for authenticating with peer.
335 char u[MAXNAMELEN], p[MAXSECRETLEN];
338 lcp_allowoptions[0].neg_upap = 1;
340 /* open user info file */
341 fname = strdup(*argv);
343 novm("+ua file name");
345 ufile = fopen(fname, "r");
348 option_error("unable to open user login data file %s", fname);
351 check_access(ufile, fname);
355 if (fgets(u, MAXNAMELEN - 1, ufile) == NULL
356 || fgets(p, MAXSECRETLEN - 1, ufile) == NULL){
357 option_error("unable to read user login data file %s", fname);
362 /* get rid of newlines */
364 if (l > 0 && u[l-1] == '\n')
367 if (l > 0 && p[l-1] == '\n')
370 if (override_value("user", option_priority, fname))
371 strlcpy(user, u, sizeof(user));
372 if (override_value("passwd", option_priority, fname))
373 strlcpy(passwd, p, sizeof(passwd));
380 * privgroup - allow members of the group to have privileged access.
391 option_error("group %s is unknown", *argv);
394 for (i = 0; i < ngroups; ++i) {
395 if (groups[i] == g->gr_gid) {
405 * set_noauth_addr - set address(es) that can be used without authentication.
406 * Equivalent to specifying an entry like `"" * "" addr' in pap-secrets.
409 set_noauth_addr(argv)
413 int l = strlen(addr) + 1;
416 wp = (struct wordlist *) malloc(sizeof(struct wordlist) + l);
418 novm("allow-ip argument");
419 wp->word = (char *) (wp + 1);
420 wp->next = noauth_addrs;
421 BCOPY(addr, wp->word, l);
428 * An Open on LCP has requested a change from Dead to Establish phase.
429 * Do what's necessary to bring the physical layer up.
438 * LCP has terminated the link; go to the Dead phase and take the
439 * physical layer down.
442 link_terminated(unit)
445 if (phase == PHASE_DEAD)
447 if (pap_logout_hook) {
453 new_phase(PHASE_DEAD);
454 notice("Connection terminated.");
458 * LCP has gone down; it will either die or try to re-establish.
465 struct protent *protp;
467 notify(link_down_notifier, 0);
469 if (auth_script_state == s_up && auth_script_pid == 0) {
470 update_link_stats(unit);
471 auth_script_state = s_down;
472 auth_script(_PATH_AUTHDOWN);
474 for (i = 0; (protp = protocols[i]) != NULL; ++i) {
475 if (!protp->enabled_flag)
477 if (protp->protocol != PPP_LCP && protp->lowerdown != NULL)
478 (*protp->lowerdown)(unit);
479 if (protp->protocol < 0xC000 && protp->close != NULL)
480 (*protp->close)(unit, "LCP down");
484 if (phase != PHASE_DEAD)
485 new_phase(PHASE_ESTABLISH);
489 * The link is established.
490 * Proceed to the Dead, Authenticate or Network phase as appropriate.
493 link_established(unit)
497 lcp_options *wo = &lcp_wantoptions[unit];
498 lcp_options *go = &lcp_gotoptions[unit];
499 lcp_options *ho = &lcp_hisoptions[unit];
501 struct protent *protp;
504 * Tell higher-level protocols that LCP is up.
506 for (i = 0; (protp = protocols[i]) != NULL; ++i)
507 if (protp->protocol != PPP_LCP && protp->enabled_flag
508 && protp->lowerup != NULL)
509 (*protp->lowerup)(unit);
511 if (auth_required && !(go->neg_upap || go->neg_chap)) {
513 * We wanted the peer to authenticate itself, and it refused:
514 * if we have some address(es) it can use without auth, fine,
515 * otherwise treat it as though it authenticated with PAP using
516 * a username of "" and a password of "". If that's not OK,
519 if (noauth_addrs != NULL) {
520 set_allowed_addrs(unit, NULL, NULL);
521 } else if (!wo->neg_upap || uselogin || !null_login(unit)) {
522 warn("peer refused to authenticate: terminating link");
523 lcp_close(unit, "peer refused to authenticate");
524 status = EXIT_PEER_AUTH_FAILED;
529 new_phase(PHASE_AUTHENTICATE);
533 ChapAuthPeer(unit, our_name, CHAP_DIGEST(go->chap_mdtype));
535 } else if (go->neg_upap) {
540 ChapAuthWithPeer(unit, user, CHAP_DIGEST(ho->chap_mdtype));
541 auth |= CHAP_WITHPEER;
542 } else if (ho->neg_upap) {
543 if (passwd[0] == 0) {
544 passwd_from_file = 1;
545 if (!get_pap_passwd(passwd))
546 error("No secret found for PAP login");
548 upap_authwithpeer(unit, user, passwd);
549 auth |= PAP_WITHPEER;
551 auth_pending[unit] = auth;
559 * Proceed to the network phase.
565 lcp_options *go = &lcp_gotoptions[unit];
568 * If the peer had to authenticate, run the auth-up script now.
570 if (go->neg_chap || go->neg_upap) {
571 notify(auth_up_notifier, 0);
573 if (auth_script_state == s_down && auth_script_pid == 0) {
574 auth_script_state = s_up;
575 auth_script(_PATH_AUTHUP);
581 * If we negotiated callback, do it now.
584 new_phase(PHASE_CALLBACK);
585 (*cbcp_protent.open)(unit);
591 * Process extra options from the secrets file
594 options_from_list(extra_options, 1);
595 free_wordlist(extra_options);
605 struct protent *protp;
607 new_phase(PHASE_NETWORK);
609 #ifdef HAVE_MULTILINK
611 if (mp_join_bundle()) {
612 if (updetach && !nodetach)
617 #endif /* HAVE_MULTILINK */
621 set_filters(&pass_filter, &active_filter);
623 for (i = 0; (protp = protocols[i]) != NULL; ++i)
624 if (protp->protocol < 0xC000 && protp->enabled_flag
625 && protp->open != NULL) {
627 if (protp->protocol != PPP_CCP)
631 if (num_np_open == 0)
633 lcp_close(0, "No network protocols running");
637 * The peer has failed to authenticate himself using `protocol'.
640 auth_peer_fail(unit, protocol)
644 * Authentication failure: take the link down
646 lcp_close(unit, "Authentication failed");
647 status = EXIT_PEER_AUTH_FAILED;
651 * The peer has been successfully authenticated using `protocol'.
654 auth_peer_success(unit, protocol, prot_flavor, name, namelen)
655 int unit, protocol, prot_flavor;
664 switch (prot_flavor) {
665 case CHAP_DIGEST_MD5:
666 bit |= CHAP_MD5_PEER;
672 case CHAP_MICROSOFT_V2:
673 bit |= CHAP_MS2_PEER;
682 warn("auth_peer_success: unknown protocol %x", protocol);
687 * Save the authenticated name of the peer for later.
689 if (namelen > sizeof(peer_authname) - 1)
690 namelen = sizeof(peer_authname) - 1;
691 BCOPY(name, peer_authname, namelen);
692 peer_authname[namelen] = 0;
693 script_setenv("PEERNAME", peer_authname, 0);
695 /* Save the authentication method for later. */
696 auth_done[unit] |= bit;
699 * If there is no more authentication still to be done,
700 * proceed to the network (or callback) phase.
702 if ((auth_pending[unit] &= ~bit) == 0)
707 * We have failed to authenticate ourselves to the peer using `protocol'.
710 auth_withpeer_fail(unit, protocol)
713 if (passwd_from_file)
714 BZERO(passwd, MAXSECRETLEN);
716 * We've failed to authenticate ourselves to our peer.
717 * Some servers keep sending CHAP challenges, but there
718 * is no point in persisting without any way to get updated
719 * authentication secrets.
721 lcp_close(unit, "Failed to authenticate ourselves to peer");
722 status = EXIT_AUTH_TOPEER_FAILED;
726 * We have successfully authenticated ourselves with the peer using `protocol'.
729 auth_withpeer_success(unit, protocol, prot_flavor)
730 int unit, protocol, prot_flavor;
737 switch (prot_flavor) {
738 case CHAP_DIGEST_MD5:
739 bit |= CHAP_MD5_WITHPEER;
743 bit |= CHAP_MS_WITHPEER;
745 case CHAP_MICROSOFT_V2:
746 bit |= CHAP_MS2_WITHPEER;
752 if (passwd_from_file)
753 BZERO(passwd, MAXSECRETLEN);
757 warn("auth_withpeer_success: unknown protocol %x", protocol);
761 /* Save the authentication method for later. */
762 auth_done[unit] |= bit;
765 * If there is no more authentication still being done,
766 * proceed to the network (or callback) phase.
768 if ((auth_pending[unit] &= ~bit) == 0)
774 * np_up - a network protocol has come up.
782 if (num_np_up == 0) {
784 * At this point we consider that the link has come up successfully.
788 new_phase(PHASE_RUNNING);
790 if (idle_time_hook != 0)
791 tlim = (*idle_time_hook)(NULL);
793 tlim = idle_time_limit;
795 TIMEOUT(check_idle, NULL, tlim);
798 * Set a timeout to close the connection once the maximum
799 * connect time has expired.
802 TIMEOUT(connect_time_expired, 0, maxconnect);
805 * Detach now, if the updetach option was given.
807 if (updetach && !nodetach)
814 * np_down - a network protocol has gone down.
820 if (--num_np_up == 0) {
821 UNTIMEOUT(check_idle, NULL);
822 UNTIMEOUT(connect_time_expired, NULL);
823 new_phase(PHASE_NETWORK);
828 * np_finished - a network protocol has finished using the link.
831 np_finished(unit, proto)
834 if (--num_np_open <= 0) {
835 /* no further use for the link: shut up shop. */
836 lcp_close(0, "No network protocols running");
841 * check_idle - check whether the link has been idle for long
842 * enough that we can shut it down.
848 struct ppp_idle idle;
852 if (!get_idle_time(0, &idle))
854 if (idle_time_hook != 0) {
855 tlim = idle_time_hook(&idle);
857 itime = MIN(idle.xmit_idle, idle.recv_idle);
858 tlim = idle_time_limit - itime;
861 /* link is idle: shut it down. */
862 notice("Terminating connection due to lack of activity.");
863 lcp_close(0, "Link inactive");
865 status = EXIT_IDLE_TIMEOUT;
867 TIMEOUT(check_idle, NULL, tlim);
872 * connect_time_expired - log a message and close the connection.
875 connect_time_expired(arg)
878 info("Connect time expired");
879 lcp_close(0, "Connect time expired"); /* Close connection */
880 status = EXIT_CONNECT_TIME;
884 * auth_check_options - called to check authentication options.
889 lcp_options *wo = &lcp_wantoptions[0];
893 /* Default our_name to hostname, and user to our_name */
894 if (our_name[0] == 0 || usehostname)
895 strlcpy(our_name, hostname, sizeof(our_name));
897 strlcpy(user, our_name, sizeof(user));
900 * If we have a default route, require the peer to authenticate
901 * unless the noauth option was given or the real user is root.
903 if (!auth_required && !allow_any_ip && have_route_to(0) && !privileged) {
908 /* If authentication is required, ask peer for CHAP or PAP. */
911 if (!wo->neg_chap && !wo->neg_upap) {
912 wo->neg_chap = 1; wo->chap_mdtype = MDTYPE_ALL;
916 wo->neg_chap = 0; wo->chap_mdtype = MDTYPE_NONE;
921 * Check whether we have appropriate secrets to use
922 * to authenticate the peer.
925 can_auth = wo->neg_upap && (uselogin || have_pap_secret(&lacks_ip));
926 if (!can_auth && (wo->neg_chap)) {
927 can_auth = have_chap_secret((explicit_remote? remote_name: NULL),
928 our_name, 1, &lacks_ip);
931 if (auth_required && !can_auth && noauth_addrs == NULL) {
934 "By default the remote system is required to authenticate itself");
936 "(because this system has a default route to the internet)");
937 } else if (explicit_remote)
939 "The remote system (%s) is required to authenticate itself",
943 "The remote system is required to authenticate itself");
945 "but I couldn't find any suitable secret (password) for it to use to do so.");
948 "(None of the available passwords would let it use an IP address.)");
955 * auth_reset - called when LCP is starting negotiations to recheck
956 * authentication options, i.e. whether we have appropriate secrets
957 * to use for authenticating ourselves and/or the peer.
963 lcp_options *go = &lcp_gotoptions[unit];
964 lcp_options *ao = &lcp_allowoptions[0];
966 ao->neg_upap = !refuse_pap && (passwd[0] != 0 || get_pap_passwd(NULL));
967 ao->neg_chap = (!refuse_chap || !refuse_mschap || !refuse_mschap_v2)
969 || have_chap_secret(user, (explicit_remote? remote_name: NULL),
972 if (go->neg_upap && !uselogin && !have_pap_secret(NULL))
975 if (!have_chap_secret((explicit_remote? remote_name: NULL),
983 * check_passwd - Check the user name and passwd against the PAP secrets
984 * file. If requested, also check against the system password database,
985 * and login the user if OK.
988 * UPAP_AUTHNAK: Authentication failed.
989 * UPAP_AUTHACK: Authentication succeeded.
990 * In either case, msg points to an appropriate message.
993 check_passwd(unit, auser, userlen, apasswd, passwdlen, msg)
1004 struct wordlist *addrs = NULL, *opts = NULL;
1005 char passwd[256], user[256];
1006 char secret[MAXWORDLEN];
1007 static int attempts = 0;
1010 * Make copies of apasswd and auser, then null-terminate them.
1011 * If there are unprintable characters in the password, make
1014 slprintf(passwd, sizeof(passwd), "%.*v", passwdlen, apasswd);
1015 slprintf(user, sizeof(user), "%.*v", userlen, auser);
1019 * Check if a plugin wants to handle this.
1021 if (pap_auth_hook) {
1022 ret = (*pap_auth_hook)(user, passwd, msg, &addrs, &opts);
1025 set_allowed_addrs(unit, addrs, opts);
1026 BZERO(passwd, sizeof(passwd));
1028 free_wordlist(addrs);
1030 free_wordlist(opts);
1032 return ret? UPAP_AUTHACK: UPAP_AUTHNAK;
1037 * Open the file of pap secrets and scan for a suitable secret
1038 * for authenticating this user.
1040 filename = _PATH_UPAPFILE;
1041 addrs = opts = NULL;
1043 f = fopen(filename, "r");
1045 error("Can't open PAP password file %s: %m", filename);
1048 check_access(f, filename);
1049 if (scan_authfile(f, user, our_name, secret, &addrs, &opts, filename) < 0) {
1050 warn("no PAP secret found for %s", user);
1053 * If the secret is "@login", it means to check
1054 * the password against the login database.
1056 int login_secret = strcmp(secret, "@login") == 0;
1058 if (uselogin || login_secret) {
1059 /* login option or secret is @login */
1060 ret = plogin(user, passwd, msg);
1061 if (ret == UPAP_AUTHNAK)
1062 warn("PAP login failure for %s", user);
1066 if (secret[0] != 0 && !login_secret) {
1067 /* password given in pap-secrets - must match */
1068 if ((cryptpap || strcmp(passwd, secret) != 0)
1069 && strcmp(crypt(passwd, secret), secret) != 0) {
1071 warn("PAP authentication failure for %s", user);
1078 if (ret == UPAP_AUTHNAK) {
1080 *msg = "Login incorrect";
1082 * XXX can we ever get here more than once??
1083 * Frustrate passwd stealer programs.
1084 * Allow 10 tries, but start backing off after 3 (stolen from login).
1085 * On 10'th, drop the connection.
1087 if (attempts++ >= 10) {
1088 warn("%d LOGIN FAILURES ON %s, %s", attempts, devnam, user);
1089 lcp_close(unit, "login failed");
1092 sleep((u_int) (attempts - 3) * 5);
1094 free_wordlist(opts);
1097 attempts = 0; /* Reset count */
1100 set_allowed_addrs(unit, addrs, opts);
1104 free_wordlist(addrs);
1105 BZERO(passwd, sizeof(passwd));
1106 BZERO(secret, sizeof(secret));
1112 * This function is needed for PAM.
1116 /* Static variables used to communicate between the conversation function
1117 * and the server_login function
1119 static char *PAM_username;
1120 static char *PAM_password;
1121 static int PAM_error = 0;
1122 static pam_handle_t *pamh = NULL;
1124 /* PAM conversation function
1125 * Here we assume (for now, at least) that echo on means login name, and
1126 * echo off means password.
1129 static int PAM_conv (int num_msg, const struct pam_message **msg,
1130 struct pam_response **resp, void *appdata_ptr)
1133 struct pam_response *reply = NULL;
1135 #define COPY_STRING(s) (s) ? strdup(s) : NULL
1137 reply = malloc(sizeof(struct pam_response) * num_msg);
1138 if (!reply) return PAM_CONV_ERR;
1140 for (replies = 0; replies < num_msg; replies++) {
1141 switch (msg[replies]->msg_style) {
1142 case PAM_PROMPT_ECHO_ON:
1143 reply[replies].resp_retcode = PAM_SUCCESS;
1144 reply[replies].resp = COPY_STRING(PAM_username);
1145 /* PAM frees resp */
1147 case PAM_PROMPT_ECHO_OFF:
1148 reply[replies].resp_retcode = PAM_SUCCESS;
1149 reply[replies].resp = COPY_STRING(PAM_password);
1150 /* PAM frees resp */
1155 /* ignore it, but pam still wants a NULL response... */
1156 reply[replies].resp_retcode = PAM_SUCCESS;
1157 reply[replies].resp = NULL;
1160 /* Must be an error of some sort... */
1163 return PAM_CONV_ERR;
1170 static struct pam_conv PAM_conversation = {
1174 #endif /* USE_PAM */
1177 * plogin - Check the user name and password against the system
1178 * password database, and login the user if OK.
1181 * UPAP_AUTHNAK: Login failed.
1182 * UPAP_AUTHACK: Login succeeded.
1183 * In either case, msg points to an appropriate message.
1187 plogin(user, passwd, msg)
1197 pam_error = pam_start ("ppp", user, &PAM_conversation, &pamh);
1198 if (pam_error != PAM_SUCCESS) {
1199 *msg = (char *) pam_strerror (pamh, pam_error);
1201 return UPAP_AUTHNAK;
1204 * Define the fields for the credential validation
1207 PAM_username = user;
1208 PAM_password = passwd;
1210 pam_set_item (pamh, PAM_TTY, devnam); /* this might be useful to some modules */
1215 pam_error = pam_authenticate (pamh, PAM_SILENT);
1216 if (pam_error == PAM_SUCCESS && !PAM_error) {
1217 pam_error = pam_acct_mgmt (pamh, PAM_SILENT);
1218 if (pam_error == PAM_SUCCESS)
1219 pam_error = pam_open_session (pamh, PAM_SILENT);
1222 *msg = (char *) pam_strerror (pamh, pam_error);
1227 reopen_log(); /* apparently the PAM stuff does closelog() */
1228 PAM_username = NULL;
1229 PAM_password = NULL;
1230 if (pam_error != PAM_SUCCESS)
1231 return UPAP_AUTHNAK;
1232 #else /* #ifdef USE_PAM */
1235 * Use the non-PAM methods directly
1240 struct spwd *getspnam();
1242 struct passwd *pw = getpwnam(user);
1246 return (UPAP_AUTHNAK);
1249 spwd = getspnam(user);
1252 /* check the age of the password entry */
1253 long now = time(NULL) / 86400L;
1255 if ((spwd->sp_expire > 0 && now >= spwd->sp_expire)
1256 || ((spwd->sp_max >= 0 && spwd->sp_max < 10000)
1257 && spwd->sp_lstchg >= 0
1258 && now >= spwd->sp_lstchg + spwd->sp_max)) {
1259 warn("Password for %s has expired", user);
1260 return (UPAP_AUTHNAK);
1262 pw->pw_passwd = spwd->sp_pwdp;
1267 * If no passwd, don't let them login.
1269 if (pw->pw_passwd == NULL || strlen(pw->pw_passwd) < 2
1270 || strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd) != 0)
1271 return (UPAP_AUTHNAK);
1273 #endif /* #ifdef USE_PAM */
1276 * Write a wtmp entry for this user.
1280 if (strncmp(tty, "/dev/", 5) == 0)
1282 logwtmp(tty, user, remote_name); /* Add wtmp login entry */
1284 #if defined(_PATH_LASTLOG) && !defined(USE_PAM)
1285 if (pw != (struct passwd *)NULL) {
1289 if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
1290 (void)lseek(fd, (off_t)(pw->pw_uid * sizeof(ll)), SEEK_SET);
1291 memset((void *)&ll, 0, sizeof(ll));
1292 (void)time(&ll.ll_time);
1293 (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
1294 (void)write(fd, (char *)&ll, sizeof(ll));
1298 #endif /* _PATH_LASTLOG and not USE_PAM */
1300 info("user %s logged in", user);
1303 return (UPAP_AUTHACK);
1307 * plogout - Logout the user.
1316 pam_error = pam_close_session (pamh, PAM_SILENT);
1317 pam_end (pamh, pam_error);
1320 /* Apparently the pam stuff does closelog(). */
1322 #else /* ! USE_PAM */
1326 if (strncmp(tty, "/dev/", 5) == 0)
1328 logwtmp(tty, "", ""); /* Wipe out utmp logout entry */
1329 #endif /* ! USE_PAM */
1335 * null_login - Check if a username of "" and a password of "" are
1336 * acceptable, and iff so, set the list of acceptable IP addresses
1346 struct wordlist *addrs, *opts;
1347 char secret[MAXWORDLEN];
1350 * Check if a plugin wants to handle this.
1354 ret = (*null_auth_hook)(&addrs, &opts);
1357 * Open the file of pap secrets and scan for a suitable secret.
1360 filename = _PATH_UPAPFILE;
1362 f = fopen(filename, "r");
1365 check_access(f, filename);
1367 i = scan_authfile(f, "", our_name, secret, &addrs, &opts, filename);
1368 ret = i >= 0 && secret[0] == 0;
1369 BZERO(secret, sizeof(secret));
1374 set_allowed_addrs(unit, addrs, opts);
1376 free_wordlist(opts);
1378 free_wordlist(addrs);
1385 * get_pap_passwd - get a password for authenticating ourselves with
1386 * our peer using PAP. Returns 1 on success, 0 if no suitable password
1388 * Assumes passwd points to MAXSECRETLEN bytes of space (if non-null).
1391 get_pap_passwd(passwd)
1397 char secret[MAXWORDLEN];
1400 * Check whether a plugin wants to supply this.
1402 if (pap_passwd_hook) {
1403 ret = (*pap_passwd_hook)(user, passwd);
1408 filename = _PATH_UPAPFILE;
1409 f = fopen(filename, "r");
1412 check_access(f, filename);
1413 ret = scan_authfile(f, user,
1414 (remote_name[0]? remote_name: NULL),
1415 secret, NULL, NULL, filename);
1420 strlcpy(passwd, secret, MAXSECRETLEN);
1421 BZERO(secret, sizeof(secret));
1427 * have_pap_secret - check whether we have a PAP file with any
1428 * secrets that we could possibly use for authenticating the peer.
1431 have_pap_secret(lacks_ipp)
1437 struct wordlist *addrs;
1439 /* let the plugin decide, if there is one */
1440 if (pap_check_hook) {
1441 ret = (*pap_check_hook)();
1446 filename = _PATH_UPAPFILE;
1447 f = fopen(filename, "r");
1451 ret = scan_authfile(f, (explicit_remote? remote_name: NULL), our_name,
1452 NULL, &addrs, NULL, filename);
1454 if (ret >= 0 && !some_ip_ok(addrs)) {
1460 free_wordlist(addrs);
1467 * have_chap_secret - check whether we have a CHAP file with a
1468 * secret that we could possibly use for authenticating `client'
1469 * on `server'. Either can be the null string, meaning we don't
1470 * know the identity yet.
1473 have_chap_secret(client, server, need_ip, lacks_ipp)
1482 struct wordlist *addrs;
1484 if (chap_check_hook) {
1485 ret = (*chap_check_hook)();
1491 filename = _PATH_CHAPFILE;
1492 f = fopen(filename, "r");
1496 if (client != NULL && client[0] == 0)
1498 else if (server != NULL && server[0] == 0)
1501 ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename);
1503 if (ret >= 0 && need_ip && !some_ip_ok(addrs)) {
1509 free_wordlist(addrs);
1516 * get_secret - open the CHAP secret file and return the secret
1517 * for authenticating the given client on the given server.
1518 * (We could be either client or server).
1521 get_secret(unit, client, server, secret, secret_len, am_server)
1532 struct wordlist *addrs, *opts;
1533 char secbuf[MAXWORDLEN];
1535 if (!am_server && passwd[0] != 0) {
1536 strlcpy(secbuf, passwd, sizeof(secbuf));
1537 } else if (!am_server && chap_passwd_hook) {
1538 if ( (*chap_passwd_hook)(client, secbuf) < 0) {
1539 error("Unable to obtain CHAP password for %s on %s from plugin",
1544 filename = _PATH_CHAPFILE;
1548 f = fopen(filename, "r");
1550 error("Can't open chap secret file %s: %m", filename);
1553 check_access(f, filename);
1555 ret = scan_authfile(f, client, server, secbuf, &addrs, &opts, filename);
1561 set_allowed_addrs(unit, addrs, opts);
1563 free_wordlist(opts);
1565 free_wordlist(addrs);
1568 len = strlen(secbuf);
1569 if (len > MAXSECRETLEN) {
1570 error("Secret for %s on %s is too long", client, server);
1573 BCOPY(secbuf, secret, len);
1574 BZERO(secbuf, sizeof(secbuf));
1581 * set_allowed_addrs() - set the list of allowed addresses.
1582 * Also looks for `--' indicating options to apply for this peer
1583 * and leaves the following words in extra_options.
1586 set_allowed_addrs(unit, addrs, opts)
1588 struct wordlist *addrs;
1589 struct wordlist *opts;
1592 struct wordlist *ap, **plink;
1593 struct permitted_ip *ip;
1594 char *ptr_word, *ptr_mask;
1597 u_int32_t a, mask, ah, offset;
1598 struct ipcp_options *wo = &ipcp_wantoptions[unit];
1599 u_int32_t suggested_ip = 0;
1601 if (addresses[unit] != NULL)
1602 free(addresses[unit]);
1603 addresses[unit] = NULL;
1604 if (extra_options != NULL)
1605 free_wordlist(extra_options);
1606 extra_options = opts;
1609 * Count the number of IP addresses given.
1611 n = wordlist_count(addrs) + wordlist_count(noauth_addrs);
1614 ip = (struct permitted_ip *) malloc((n + 1) * sizeof(struct permitted_ip));
1618 /* temporarily append the noauth_addrs list to addrs */
1619 for (plink = &addrs; *plink != NULL; plink = &(*plink)->next)
1621 *plink = noauth_addrs;
1624 for (ap = addrs; ap != NULL; ap = ap->next) {
1625 /* "-" means no addresses authorized, "*" means any address allowed */
1626 ptr_word = ap->word;
1627 if (strcmp(ptr_word, "-") == 0)
1629 if (strcmp(ptr_word, "*") == 0) {
1631 ip[n].base = ip[n].mask = 0;
1637 if (*ptr_word == '!') {
1642 mask = ~ (u_int32_t) 0;
1644 ptr_mask = strchr (ptr_word, '/');
1645 if (ptr_mask != NULL) {
1649 bit_count = (int) strtol (ptr_mask+1, &endp, 10);
1650 if (bit_count <= 0 || bit_count > 32) {
1651 warn("invalid address length %v in auth. address list",
1655 bit_count = 32 - bit_count; /* # bits in host part */
1657 offset = ifunit + 1;
1661 warn("invalid address length syntax: %v", ptr_mask+1);
1668 hp = gethostbyname(ptr_word);
1669 if (hp != NULL && hp->h_addrtype == AF_INET) {
1670 a = *(u_int32_t *)hp->h_addr;
1672 np = getnetbyname (ptr_word);
1673 if (np != NULL && np->n_addrtype == AF_INET) {
1674 a = htonl (*(u_int32_t *)np->n_net);
1675 if (ptr_mask == NULL) {
1676 /* calculate appropriate mask for net */
1679 mask = IN_CLASSA_NET;
1680 else if (IN_CLASSB(ah))
1681 mask = IN_CLASSB_NET;
1682 else if (IN_CLASSC(ah))
1683 mask = IN_CLASSC_NET;
1686 a = inet_addr (ptr_word);
1690 if (ptr_mask != NULL)
1693 if (a == (u_int32_t)-1L) {
1694 warn("unknown host %s in auth. address list", ap->word);
1698 if (offset >= ~mask) {
1699 warn("interface unit %d too large for subnet %v",
1703 a = htonl((ntohl(a) & mask) + offset);
1704 mask = ~(u_int32_t)0;
1706 ip[n].mask = htonl(mask);
1707 ip[n].base = a & ip[n].mask;
1709 if (~mask == 0 && suggested_ip == 0)
1714 ip[n].permit = 0; /* make the last entry forbid all addresses */
1715 ip[n].base = 0; /* to terminate the list */
1718 addresses[unit] = ip;
1721 * If the address given for the peer isn't authorized, or if
1722 * the user hasn't given one, AND there is an authorized address
1723 * which is a single host, then use that if we find one.
1725 if (suggested_ip != 0
1726 && (wo->hisaddr == 0 || !auth_ip_addr(unit, wo->hisaddr))) {
1727 wo->hisaddr = suggested_ip;
1729 * Do we insist on this address? No, if there are other
1730 * addresses authorized than the suggested one.
1733 wo->accept_remote = 1;
1738 * auth_ip_addr - check whether the peer is authorized to use
1739 * a given IP address. Returns 1 if authorized, 0 otherwise.
1742 auth_ip_addr(unit, addr)
1748 /* don't allow loopback or multicast address */
1749 if (bad_ip_adrs(addr))
1752 if (allowed_address_hook) {
1753 ok = allowed_address_hook(addr);
1754 if (ok >= 0) return ok;
1757 if (addresses[unit] != NULL) {
1758 ok = ip_addr_check(addr, addresses[unit]);
1764 return 0; /* no addresses authorized */
1765 return allow_any_ip || privileged || !have_route_to(addr);
1769 ip_addr_check(addr, addrs)
1771 struct permitted_ip *addrs;
1774 if ((addr & addrs->mask) == addrs->base)
1775 return addrs->permit;
1779 * bad_ip_adrs - return 1 if the IP address is one we don't want
1780 * to use, such as an address in the loopback net or a multicast address.
1781 * addr is in network byte order.
1788 return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
1789 || IN_MULTICAST(addr) || IN_BADCLASS(addr);
1793 * some_ip_ok - check a wordlist to see if it authorizes any
1798 struct wordlist *addrs;
1800 for (; addrs != 0; addrs = addrs->next) {
1801 if (addrs->word[0] == '-')
1803 if (addrs->word[0] != '!')
1804 return 1; /* some IP address is allowed */
1810 * check_access - complain if a secret file has too-liberal permissions.
1813 check_access(f, filename)
1819 if (fstat(fileno(f), &sbuf) < 0) {
1820 warn("cannot stat secret file %s: %m", filename);
1821 } else if ((sbuf.st_mode & (S_IRWXG | S_IRWXO)) != 0) {
1822 warn("Warning - secret file %s has world and/or group access",
1829 * scan_authfile - Scan an authorization file for a secret suitable
1830 * for authenticating `client' on `server'. The return value is -1
1831 * if no secret is found, otherwise >= 0. The return value has
1832 * NONWILD_CLIENT set if the secret didn't have "*" for the client, and
1833 * NONWILD_SERVER set if the secret didn't have "*" for the server.
1834 * Any following words on the line up to a "--" (i.e. address authorization
1835 * info) are placed in a wordlist and returned in *addrs. Any
1836 * following words (extra options) are placed in a wordlist and
1837 * returned in *opts.
1838 * We assume secret is NULL or points to MAXWORDLEN bytes of space.
1841 scan_authfile(f, client, server, secret, addrs, opts, filename)
1846 struct wordlist **addrs;
1847 struct wordlist **opts;
1851 int got_flag, best_flag;
1853 struct wordlist *ap, *addr_list, *alist, **app;
1854 char word[MAXWORDLEN];
1855 char atfile[MAXWORDLEN];
1856 char lsecret[MAXWORDLEN];
1863 if (!getword(f, word, &newline, filename))
1864 return -1; /* file is empty??? */
1869 * Skip until we find a word at the start of a line.
1871 while (!newline && getword(f, word, &newline, filename))
1874 break; /* got to end of file */
1877 * Got a client - check if it's a match or a wildcard.
1880 if (client != NULL && strcmp(word, client) != 0 && !ISWILD(word)) {
1885 got_flag = NONWILD_CLIENT;
1888 * Now get a server and check if it matches.
1890 if (!getword(f, word, &newline, filename))
1894 if (!ISWILD(word)) {
1895 if (server != NULL && strcmp(word, server) != 0)
1897 got_flag |= NONWILD_SERVER;
1901 * Got some sort of a match - see if it's better than what
1904 if (got_flag <= best_flag)
1910 if (!getword(f, word, &newline, filename))
1915 if (secret != NULL) {
1917 * Special syntax: @/pathname means read secret from file.
1919 if (word[0] == '@' && word[1] == '/') {
1920 strlcpy(atfile, word+1, sizeof(atfile));
1921 if ((sf = fopen(atfile, "r")) == NULL) {
1922 warn("can't open indirect secret file %s", atfile);
1925 check_access(sf, atfile);
1926 if (!getword(sf, word, &xxx, atfile)) {
1927 warn("no secret in indirect secret file %s", atfile);
1933 strlcpy(lsecret, word, sizeof(lsecret));
1937 * Now read address authorization info and make a wordlist.
1941 if (!getword(f, word, &newline, filename) || newline)
1943 ap = (struct wordlist *)
1944 malloc(sizeof(struct wordlist) + strlen(word) + 1);
1946 novm("authorized addresses");
1947 ap->word = (char *) (ap + 1);
1948 strcpy(ap->word, word);
1955 * This is the best so far; remember it.
1957 best_flag = got_flag;
1959 free_wordlist(addr_list);
1962 strlcpy(secret, lsecret, MAXWORDLEN);
1968 /* scan for a -- word indicating the start of options */
1969 for (app = &addr_list; (ap = *app) != NULL; app = &ap->next)
1970 if (strcmp(ap->word, "--") == 0)
1972 /* ap = start of options */
1974 ap = ap->next; /* first option */
1975 free(*app); /* free the "--" word */
1976 *app = NULL; /* terminate addr list */
1980 else if (ap != NULL)
1984 else if (addr_list != NULL)
1985 free_wordlist(addr_list);
1991 * wordlist_count - return the number of items in a wordlist
1995 struct wordlist *wp;
1999 for (n = 0; wp != NULL; wp = wp->next)
2005 * free_wordlist - release memory allocated for a wordlist.
2009 struct wordlist *wp;
2011 struct wordlist *next;
2013 while (wp != NULL) {
2021 * auth_script_done - called when the auth-up or auth-down script
2025 auth_script_done(arg)
2028 auth_script_pid = 0;
2029 switch (auth_script_state) {
2031 if (auth_state == s_down) {
2032 auth_script_state = s_down;
2033 auth_script(_PATH_AUTHDOWN);
2037 if (auth_state == s_up) {
2038 auth_script_state = s_up;
2039 auth_script(_PATH_AUTHUP);
2046 * auth_script - execute a script with arguments
2047 * interface-name peer-name real-user tty speed
2059 if ((pw = getpwuid(getuid())) != NULL && pw->pw_name != NULL)
2060 user_name = pw->pw_name;
2062 slprintf(struid, sizeof(struid), "%d", getuid());
2065 slprintf(strspeed, sizeof(strspeed), "%d", baud_rate);
2069 argv[2] = peer_authname;
2070 argv[3] = user_name;
2075 auth_script_pid = run_program(script, argv, 0, auth_script_done, NULL);