/*
* auth.c - PPP authentication and phase control.
*
- * Copyright (c) 1993 The Australian National University.
- * All rights reserved.
+ * Copyright (c) 1993-2002 Paul Mackerras. All rights reserved.
*
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the Australian National University. The name of the University
- * may not be used to endorse or promote products derived from this
- * software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
*
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
*
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Carnegie Mellon University. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * 2. The name(s) of the authors of this software must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission.
+ *
+ * 3. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Paul Mackerras
+ * <paulus@samba.org>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Derived from main.c, which is:
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For permission or any legal
+ * details, please contact
+ * Office of Technology Transfer
+ * Carnegie Mellon University
+ * 5000 Forbes Avenue
+ * Pittsburgh, PA 15213-3890
+ * (412) 268-4387, fax: (412) 268-7395
+ * tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Computing Services
+ * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#define RCSID "$Id: auth.c,v 1.82 2002/09/12 22:38:47 paulus Exp $"
+#define RCSID "$Id: auth.c,v 1.109 2006/05/22 00:04:07 paulus Exp $"
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>
+#include <errno.h>
#include <pwd.h>
#include <grp.h>
#include <string.h>
#include <sys/socket.h>
#include <utmp.h>
#include <fcntl.h>
-#if defined(_PATH_LASTLOG) && defined(_linux_)
+#if defined(_PATH_LASTLOG) && defined(__linux__)
#include <lastlog.h>
#endif
#include "ecp.h"
#include "ipcp.h"
#include "upap.h"
-#include "chap.h"
+#include "chap-new.h"
+#include "eap.h"
#ifdef CBCP_SUPPORT
#include "cbcp.h"
#endif
without authenticating itself. */
static struct wordlist *noauth_addrs;
+/* Remote telephone number, if available */
+char remote_number[MAXNAMELEN];
+
+/* Wordlist giving remote telephone numbers which may connect. */
+static struct wordlist *permitted_numbers;
+
/* Extra options to apply, from the secrets file entry for the peer. */
static struct wordlist *extra_options;
/* Hook for a plugin to get the PAP password for authenticating us */
int (*pap_passwd_hook) __P((char *user, char *passwd)) = NULL;
+/* Hook for a plugin to say if we can possibly authenticate a peer using CHAP */
+int (*chap_check_hook) __P((void)) = NULL;
+
+/* Hook for a plugin to get the CHAP password for authenticating us */
+int (*chap_passwd_hook) __P((char *user, char *passwd)) = NULL;
+
/* Hook for a plugin to say whether it is OK if the peer
refuses to authenticate. */
int (*null_auth_hook) __P((struct wordlist **paddrs,
bool cryptpap = 0; /* Passwords in pap-secrets are encrypted */
bool refuse_pap = 0; /* Don't wanna auth. ourselves with PAP */
bool refuse_chap = 0; /* Don't wanna auth. ourselves with CHAP */
+bool refuse_eap = 0; /* Don't wanna auth. ourselves with EAP */
#ifdef CHAPMS
bool refuse_mschap = 0; /* Don't wanna auth. ourselves with MS-CHAP */
bool refuse_mschap_v2 = 0; /* Don't wanna auth. ourselves with MS-CHAPv2 */
static int get_pap_passwd __P((char *));
static int have_pap_secret __P((int *));
static int have_chap_secret __P((char *, char *, int, int *));
+static int have_srp_secret __P((char *client, char *server, int need_ip,
+ int *lacks_ipp));
static int ip_addr_check __P((u_int32_t, struct permitted_ip *));
static int scan_authfile __P((FILE *, char *, char *, char *,
struct wordlist **, struct wordlist **,
- char *));
+ char *, int));
static void free_wordlist __P((struct wordlist *));
static void auth_script __P((char *));
static void auth_script_done __P((void *));
static int setupapfile __P((char **));
static int privgroup __P((char **));
static int set_noauth_addr __P((char **));
+static int set_permitted_number __P((char **));
static void check_access __P((FILE *, char *));
static int wordlist_count __P((struct wordlist *));
{ "auth", o_bool, &auth_required,
"Require authentication from peer", OPT_PRIO | 1 },
{ "noauth", o_bool, &auth_required,
- "Don't require peer to authenticate", OPT_PRIOSUB | OPT_PRIV | OPT_A2COPY,
+ "Don't require peer to authenticate", OPT_PRIOSUB | OPT_PRIV,
&allow_any_ip },
{ "require-pap", o_bool, &lcp_wantoptions[0].neg_upap,
"Require PAP authentication from peer",
- OPT_PRIOSUB | OPT_A2COPY | 1, &auth_required },
+ OPT_PRIOSUB | 1, &auth_required },
{ "+pap", o_bool, &lcp_wantoptions[0].neg_upap,
"Require PAP authentication from peer",
- OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | 1, &auth_required },
- { "require-chap", o_bool, &lcp_wantoptions[0].neg_chap,
+ OPT_ALIAS | OPT_PRIOSUB | 1, &auth_required },
+ { "require-chap", o_bool, &auth_required,
"Require CHAP authentication from peer",
- OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MD5,
- &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
- { "+chap", o_bool, &lcp_wantoptions[0].neg_chap,
+ OPT_PRIOSUB | OPT_A2OR | MDTYPE_MD5,
+ &lcp_wantoptions[0].chap_mdtype },
+ { "+chap", o_bool, &auth_required,
"Require CHAP authentication from peer",
- OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MD5,
- &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
+ OPT_ALIAS | OPT_PRIOSUB | OPT_A2OR | MDTYPE_MD5,
+ &lcp_wantoptions[0].chap_mdtype },
#ifdef CHAPMS
- { "require-mschap", o_bool, &lcp_wantoptions[0].neg_chap,
+ { "require-mschap", o_bool, &auth_required,
"Require MS-CHAP authentication from peer",
- OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT,
- &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
- { "+mschap", o_bool, &lcp_wantoptions[0].neg_chap,
+ OPT_PRIOSUB | OPT_A2OR | MDTYPE_MICROSOFT,
+ &lcp_wantoptions[0].chap_mdtype },
+ { "+mschap", o_bool, &auth_required,
"Require MS-CHAP authentication from peer",
- OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT,
- &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
- { "require-mschap-v2", o_bool, &lcp_wantoptions[0].neg_chap,
+ OPT_ALIAS | OPT_PRIOSUB | OPT_A2OR | MDTYPE_MICROSOFT,
+ &lcp_wantoptions[0].chap_mdtype },
+ { "require-mschap-v2", o_bool, &auth_required,
"Require MS-CHAPv2 authentication from peer",
- OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT_V2,
- &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
- { "+mschap-v2", o_bool, &lcp_wantoptions[0].neg_chap,
+ OPT_PRIOSUB | OPT_A2OR | MDTYPE_MICROSOFT_V2,
+ &lcp_wantoptions[0].chap_mdtype },
+ { "+mschap-v2", o_bool, &auth_required,
"Require MS-CHAPv2 authentication from peer",
- OPT_ALIAS | OPT_PRIOSUB | OPT_A2COPY | OPT_A3OR | MDTYPE_MICROSOFT_V2,
- &auth_required, 0, 0, NULL, 0, 0, &lcp_wantoptions[0].chap_mdtype },
+ OPT_ALIAS | OPT_PRIOSUB | OPT_A2OR | MDTYPE_MICROSOFT_V2,
+ &lcp_wantoptions[0].chap_mdtype },
#endif
{ "refuse-pap", o_bool, &refuse_pap,
{ "-pap", o_bool, &refuse_pap,
"Don't allow PAP authentication with peer", OPT_ALIAS | 1 },
{ "refuse-chap", o_bool, &refuse_chap,
- "Don't agree to auth to peer with CHAP", OPT_A2CLRB | MDTYPE_MD5,
+ "Don't agree to auth to peer with CHAP",
+ OPT_A2CLRB | MDTYPE_MD5,
&lcp_allowoptions[0].chap_mdtype },
{ "-chap", o_bool, &refuse_chap,
"Don't allow CHAP authentication with peer",
#ifdef CHAPMS
{ "refuse-mschap", o_bool, &refuse_mschap,
"Don't agree to auth to peer with MS-CHAP",
- OPT_A2CLRB | MDTYPE_MICROSOFT, &lcp_allowoptions[0].chap_mdtype },
+ OPT_A2CLRB | MDTYPE_MICROSOFT,
+ &lcp_allowoptions[0].chap_mdtype },
{ "-mschap", o_bool, &refuse_mschap,
"Don't allow MS-CHAP authentication with peer",
OPT_ALIAS | OPT_A2CLRB | MDTYPE_MICROSOFT,
&lcp_allowoptions[0].chap_mdtype },
{ "refuse-mschap-v2", o_bool, &refuse_mschap_v2,
"Don't agree to auth to peer with MS-CHAPv2",
- OPT_A2CLRB | MDTYPE_MICROSOFT_V2, &lcp_allowoptions[0].chap_mdtype },
+ OPT_A2CLRB | MDTYPE_MICROSOFT_V2,
+ &lcp_allowoptions[0].chap_mdtype },
{ "-mschap-v2", o_bool, &refuse_mschap_v2,
"Don't allow MS-CHAPv2 authentication with peer",
OPT_ALIAS | OPT_A2CLRB | MDTYPE_MICROSOFT_V2,
&lcp_allowoptions[0].chap_mdtype },
#endif
+ { "require-eap", o_bool, &lcp_wantoptions[0].neg_eap,
+ "Require EAP authentication from peer", OPT_PRIOSUB | 1,
+ &auth_required },
+ { "refuse-eap", o_bool, &refuse_eap,
+ "Don't agree to authenticate to peer with EAP", 1 },
+
{ "name", o_string, our_name,
"Set local name for authentication",
OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXNAMELEN },
"Set IP address(es) which can be used without authentication",
OPT_PRIV | OPT_A2LIST },
+ { "remotenumber", o_string, remote_number,
+ "Set remote telephone number for authentication", OPT_PRIO | OPT_STATIC,
+ NULL, MAXNAMELEN },
+
+ { "allow-number", o_special, (void *)set_permitted_number,
+ "Set telephone number(s) which are allowed to connect",
+ OPT_PRIV | OPT_A2LIST },
+
{ NULL }
};
/* get username */
if (fgets(u, MAXNAMELEN - 1, ufile) == NULL
- || fgets(p, MAXSECRETLEN - 1, ufile) == NULL){
+ || fgets(p, MAXSECRETLEN - 1, ufile) == NULL) {
+ fclose(ufile);
option_error("unable to read user login data file %s", fname);
return 0;
}
}
+/*
+ * set_permitted_number - set remote telephone number(s) that may connect.
+ */
+static int
+set_permitted_number(argv)
+ char **argv;
+{
+ char *number = *argv;
+ int l = strlen(number) + 1;
+ struct wordlist *wp;
+
+ wp = (struct wordlist *) malloc(sizeof(struct wordlist) + l);
+ if (wp == NULL)
+ novm("allow-number argument");
+ wp->word = (char *) (wp + 1);
+ wp->next = permitted_numbers;
+ BCOPY(number, wp->word, l);
+ permitted_numbers = wp;
+ return 1;
+}
+
+
/*
* An Open on LCP has requested a change from Dead to Establish phase.
- * Do what's necessary to bring the physical layer up.
*/
void
link_required(unit)
{
}
+/*
+ * Bring the link up to the point of being able to do ppp.
+ */
+void start_link(unit)
+ int unit;
+{
+ char *msg;
+
+ new_phase(PHASE_SERIALCONN);
+
+ devfd = the_channel->connect();
+ msg = "Connect script failed";
+ if (devfd < 0)
+ goto fail;
+
+ /* set up the serial device as a ppp interface */
+ /*
+ * N.B. we used to do tdb_writelock/tdb_writeunlock around this
+ * (from establish_ppp to set_ifunit). However, we won't be
+ * doing the set_ifunit in multilink mode, which is the only time
+ * we need the atomicity that the tdb_writelock/tdb_writeunlock
+ * gives us. Thus we don't need the tdb_writelock/tdb_writeunlock.
+ */
+ fd_ppp = the_channel->establish_ppp(devfd);
+ msg = "ppp establishment failed";
+ if (fd_ppp < 0) {
+ status = EXIT_FATAL_ERROR;
+ goto disconnect;
+ }
+
+ if (!demand && ifunit >= 0)
+ set_ifunit(1);
+
+ /*
+ * Start opening the connection and wait for
+ * incoming events (reply, timeout, etc.).
+ */
+ if (ifunit >= 0)
+ notice("Connect: %s <--> %s", ifname, ppp_devnam);
+ else
+ notice("Starting negotiation on %s", ppp_devnam);
+ add_fd(fd_ppp);
+
+ status = EXIT_NEGOTIATION_FAILED;
+ new_phase(PHASE_ESTABLISH);
+
+ lcp_lowerup(0);
+ return;
+
+ disconnect:
+ new_phase(PHASE_DISCONNECT);
+ if (the_channel->disconnect)
+ the_channel->disconnect();
+
+ fail:
+ new_phase(PHASE_DEAD);
+ if (the_channel->cleanup)
+ (*the_channel->cleanup)();
+}
+
/*
* LCP has terminated the link; go to the Dead phase and take the
* physical layer down.
link_terminated(unit)
int unit;
{
- if (phase == PHASE_DEAD)
+ if (phase == PHASE_DEAD || phase == PHASE_MASTER)
return;
+ new_phase(PHASE_DISCONNECT);
+
if (pap_logout_hook) {
pap_logout_hook();
} else {
if (logged_in)
plogout();
}
- new_phase(PHASE_DEAD);
- notice("Connection terminated.");
+
+ if (!doing_multilink) {
+ notice("Connection terminated.");
+ print_link_stats();
+ } else
+ notice("Link terminated.");
+
+ /*
+ * Delete pid files before disestablishing ppp. Otherwise it
+ * can happen that another pppd gets the same unit and then
+ * we delete its pid file.
+ */
+ if (!doing_multilink && !demand)
+ remove_pidfiles();
+
+ /*
+ * If we may want to bring the link up again, transfer
+ * the ppp unit back to the loopback. Set the
+ * real serial device back to its normal mode of operation.
+ */
+ if (fd_ppp >= 0) {
+ remove_fd(fd_ppp);
+ clean_check();
+ the_channel->disestablish_ppp(devfd);
+ if (doing_multilink)
+ mp_exit_bundle();
+ fd_ppp = -1;
+ }
+ if (!hungup)
+ lcp_lowerdown(0);
+ if (!doing_multilink && !demand)
+ script_unsetenv("IFNAME");
+
+ /*
+ * Run disconnector script, if requested.
+ * XXX we may not be able to do this if the line has hung up!
+ */
+ if (devfd >= 0 && the_channel->disconnect) {
+ the_channel->disconnect();
+ devfd = -1;
+ }
+ if (the_channel->cleanup)
+ (*the_channel->cleanup)();
+
+ if (doing_multilink && multilink_master) {
+ if (!bundle_terminating)
+ new_phase(PHASE_MASTER);
+ else
+ mp_bundle_terminated();
+ } else
+ new_phase(PHASE_DEAD);
}
/*
void
link_down(unit)
int unit;
+{
+ if (auth_state != s_down) {
+ notify(link_down_notifier, 0);
+ auth_state = s_down;
+ if (auth_script_state == s_up && auth_script_pid == 0) {
+ update_link_stats(unit);
+ auth_script_state = s_down;
+ auth_script(_PATH_AUTHDOWN);
+ }
+ }
+ if (!doing_multilink) {
+ upper_layers_down(unit);
+ if (phase != PHASE_DEAD && phase != PHASE_MASTER)
+ new_phase(PHASE_ESTABLISH);
+ }
+ /* XXX if doing_multilink, should do something to stop
+ network-layer traffic on the link */
+}
+
+void upper_layers_down(int unit)
{
int i;
struct protent *protp;
- notify(link_down_notifier, 0);
- auth_state = s_down;
- if (auth_script_state == s_up && auth_script_pid == 0) {
- update_link_stats(unit);
- auth_script_state = s_down;
- auth_script(_PATH_AUTHDOWN);
- }
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
if (!protp->enabled_flag)
continue;
}
num_np_open = 0;
num_np_up = 0;
- if (phase != PHASE_DEAD)
- new_phase(PHASE_ESTABLISH);
}
/*
/*
* Tell higher-level protocols that LCP is up.
*/
- for (i = 0; (protp = protocols[i]) != NULL; ++i)
- if (protp->protocol != PPP_LCP && protp->enabled_flag
- && protp->lowerup != NULL)
- (*protp->lowerup)(unit);
+ if (!doing_multilink) {
+ for (i = 0; (protp = protocols[i]) != NULL; ++i)
+ if (protp->protocol != PPP_LCP && protp->enabled_flag
+ && protp->lowerup != NULL)
+ (*protp->lowerup)(unit);
+ }
+
+ if (!auth_required && noauth_addrs != NULL)
+ set_allowed_addrs(unit, NULL, NULL);
- if (auth_required && !(go->neg_upap || go->neg_chap)) {
+ if (auth_required && !(go->neg_upap || go->neg_chap || go->neg_eap)) {
/*
* We wanted the peer to authenticate itself, and it refused:
* if we have some address(es) it can use without auth, fine,
set_allowed_addrs(unit, NULL, NULL);
} else if (!wo->neg_upap || uselogin || !null_login(unit)) {
warn("peer refused to authenticate: terminating link");
- lcp_close(unit, "peer refused to authenticate");
status = EXIT_PEER_AUTH_FAILED;
+ lcp_close(unit, "peer refused to authenticate");
return;
}
}
new_phase(PHASE_AUTHENTICATE);
used_login = 0;
auth = 0;
- if (go->neg_chap) {
- ChapAuthPeer(unit, our_name, CHAP_DIGEST(go->chap_mdtype));
+ if (go->neg_eap) {
+ eap_authpeer(unit, our_name);
+ auth |= EAP_PEER;
+ } else if (go->neg_chap) {
+ chap_auth_peer(unit, our_name, CHAP_DIGEST(go->chap_mdtype));
auth |= CHAP_PEER;
} else if (go->neg_upap) {
upap_authpeer(unit);
auth |= PAP_PEER;
}
- if (ho->neg_chap) {
- ChapAuthWithPeer(unit, user, CHAP_DIGEST(ho->chap_mdtype));
+ if (ho->neg_eap) {
+ eap_authwithpeer(unit, user);
+ auth |= EAP_WITHPEER;
+ } else if (ho->neg_chap) {
+ chap_auth_with_peer(unit, user, CHAP_DIGEST(ho->chap_mdtype));
auth |= CHAP_WITHPEER;
} else if (ho->neg_upap) {
if (passwd[0] == 0) {
{
lcp_options *go = &lcp_gotoptions[unit];
+ /* Log calling number. */
+ if (*remote_number)
+ notice("peer from calling number %q authorized", remote_number);
+
/*
* If the peer had to authenticate, run the auth-up script now.
*/
- if (go->neg_chap || go->neg_upap) {
+ if (go->neg_chap || go->neg_upap || go->neg_eap) {
notify(auth_up_notifier, 0);
auth_state = s_up;
if (auth_script_state == s_down && auth_script_pid == 0) {
/*
* Authentication failure: take the link down
*/
- lcp_close(unit, "Authentication failed");
status = EXIT_PEER_AUTH_FAILED;
+ lcp_close(unit, "Authentication failed");
}
/*
case PPP_CHAP:
bit = CHAP_PEER;
switch (prot_flavor) {
- case CHAP_DIGEST_MD5:
+ case CHAP_MD5:
bit |= CHAP_MD5_PEER;
break;
#ifdef CHAPMS
case PPP_PAP:
bit = PAP_PEER;
break;
+ case PPP_EAP:
+ bit = EAP_PEER;
+ break;
default:
warn("auth_peer_success: unknown protocol %x", protocol);
return;
* is no point in persisting without any way to get updated
* authentication secrets.
*/
- lcp_close(unit, "Failed to authenticate ourselves to peer");
status = EXIT_AUTH_TOPEER_FAILED;
+ lcp_close(unit, "Failed to authenticate ourselves to peer");
}
/*
int unit, protocol, prot_flavor;
{
int bit;
+ const char *prot = "";
switch (protocol) {
case PPP_CHAP:
bit = CHAP_WITHPEER;
+ prot = "CHAP";
switch (prot_flavor) {
- case CHAP_DIGEST_MD5:
+ case CHAP_MD5:
bit |= CHAP_MD5_WITHPEER;
break;
#ifdef CHAPMS
if (passwd_from_file)
BZERO(passwd, MAXSECRETLEN);
bit = PAP_WITHPEER;
+ prot = "PAP";
+ break;
+ case PPP_EAP:
+ bit = EAP_WITHPEER;
+ prot = "EAP";
break;
default:
warn("auth_withpeer_success: unknown protocol %x", protocol);
bit = 0;
}
+ notice("%s authentication succeeded", prot);
+
/* Save the authentication method for later. */
auth_done[unit] |= bit;
diff = maxoctets - used;
if(diff < 0) {
notice("Traffic limit reached. Limit: %u Used: %u", maxoctets, used);
+ status = EXIT_TRAFFIC_LIMIT;
lcp_close(0, "Traffic limit");
need_holdoff = 0;
- status = EXIT_TRAFFIC_LIMIT;
} else {
TIMEOUT(check_maxoctets, NULL, maxoctets_timeout);
}
if (tlim <= 0) {
/* link is idle: shut it down. */
notice("Terminating connection due to lack of activity.");
+ status = EXIT_IDLE_TIMEOUT;
lcp_close(0, "Link inactive");
need_holdoff = 0;
- status = EXIT_IDLE_TIMEOUT;
} else {
TIMEOUT(check_idle, NULL, tlim);
}
void *arg;
{
info("Connect time expired");
- lcp_close(0, "Connect time expired"); /* Close connection */
status = EXIT_CONNECT_TIME;
+ lcp_close(0, "Connect time expired"); /* Close connection */
}
/*
default_auth = 1;
}
- /* If authentication is required, ask peer for CHAP or PAP. */
+ /* If we selected any CHAP flavors, we should probably negotiate it. :-) */
+ if (wo->chap_mdtype)
+ wo->neg_chap = 1;
+
+ /* If authentication is required, ask peer for CHAP, PAP, or EAP. */
if (auth_required) {
allow_any_ip = 0;
- if (!wo->neg_chap && !wo->neg_upap) {
- wo->neg_chap = 1; wo->chap_mdtype = MDTYPE_ALL;
+ if (!wo->neg_chap && !wo->neg_upap && !wo->neg_eap) {
+ wo->neg_chap = chap_mdtype_all != MDTYPE_NONE;
+ wo->chap_mdtype = chap_mdtype_all;
wo->neg_upap = 1;
+ wo->neg_eap = 1;
}
} else {
- wo->neg_chap = 0; wo->chap_mdtype = MDTYPE_NONE;
+ wo->neg_chap = 0;
+ wo->chap_mdtype = MDTYPE_NONE;
wo->neg_upap = 0;
+ wo->neg_eap = 0;
}
/*
* Check whether we have appropriate secrets to use
- * to authenticate the peer.
+ * to authenticate the peer. Note that EAP can authenticate by way
+ * of a CHAP-like exchanges as well as SRP.
*/
lacks_ip = 0;
can_auth = wo->neg_upap && (uselogin || have_pap_secret(&lacks_ip));
- if (!can_auth && (wo->neg_chap)) {
+ if (!can_auth && (wo->neg_chap || wo->neg_eap)) {
can_auth = have_chap_secret((explicit_remote? remote_name: NULL),
our_name, 1, &lacks_ip);
}
+ if (!can_auth && wo->neg_eap) {
+ can_auth = have_srp_secret((explicit_remote? remote_name: NULL),
+ our_name, 1, &lacks_ip);
+ }
if (auth_required && !can_auth && noauth_addrs == NULL) {
if (default_auth) {
exit(1);
}
+
+ /*
+ * Early check for remote number authorization.
+ */
+ if (!auth_number()) {
+ warn("calling number %q is not authorized", remote_number);
+ exit(EXIT_CNID_AUTH_FAILED);
+ }
}
/*
int unit;
{
lcp_options *go = &lcp_gotoptions[unit];
- lcp_options *ao = &lcp_allowoptions[0];
+ lcp_options *ao = &lcp_allowoptions[unit];
+ int hadchap;
+ hadchap = -1;
ao->neg_upap = !refuse_pap && (passwd[0] != 0 || get_pap_passwd(NULL));
ao->neg_chap = (!refuse_chap || !refuse_mschap || !refuse_mschap_v2)
- && (passwd[0] != 0
- || have_chap_secret(user, (explicit_remote? remote_name: NULL),
- 0, NULL));
-
+ && (passwd[0] != 0 ||
+ (hadchap = have_chap_secret(user, (explicit_remote? remote_name:
+ NULL), 0, NULL)));
+ ao->neg_eap = !refuse_eap && (
+ passwd[0] != 0 ||
+ (hadchap == 1 || (hadchap == -1 && have_chap_secret(user,
+ (explicit_remote? remote_name: NULL), 0, NULL))) ||
+ have_srp_secret(user, (explicit_remote? remote_name: NULL), 0, NULL));
+
+ hadchap = -1;
if (go->neg_upap && !uselogin && !have_pap_secret(NULL))
go->neg_upap = 0;
if (go->neg_chap) {
- if (!have_chap_secret((explicit_remote? remote_name: NULL),
- our_name, 1, NULL))
+ if (!(hadchap = have_chap_secret((explicit_remote? remote_name: NULL),
+ our_name, 1, NULL)))
go->neg_chap = 0;
}
+ if (go->neg_eap &&
+ (hadchap == 0 || (hadchap == -1 &&
+ !have_chap_secret((explicit_remote? remote_name: NULL), our_name,
+ 1, NULL))) &&
+ !have_srp_secret((explicit_remote? remote_name: NULL), our_name, 1,
+ NULL))
+ go->neg_eap = 0;
}
if (pap_auth_hook) {
ret = (*pap_auth_hook)(user, passwd, msg, &addrs, &opts);
if (ret >= 0) {
+ /* note: set_allowed_addrs() saves opts (but not addrs):
+ don't free it! */
if (ret)
set_allowed_addrs(unit, addrs, opts);
- BZERO(passwd, sizeof(passwd));
+ else if (opts != 0)
+ free_wordlist(opts);
if (addrs != 0)
free_wordlist(addrs);
- if (opts != 0) {
- free_wordlist(opts);
- }
+ BZERO(passwd, sizeof(passwd));
return ret? UPAP_AUTHACK: UPAP_AUTHNAK;
}
}
} else {
check_access(f, filename);
- if (scan_authfile(f, user, our_name, secret, &addrs, &opts, filename) < 0) {
+ if (scan_authfile(f, user, our_name, secret, &addrs, &opts, filename, 0) < 0) {
warn("no PAP secret found for %s", user);
} else {
/*
ret = UPAP_AUTHACK;
if (uselogin || login_secret) {
/* login option or secret is @login */
- ret = plogin(user, passwd, msg);
- if (ret == UPAP_AUTHNAK)
- warn("PAP login failure for %s", user);
- else
+ if ((ret = plogin(user, passwd, msg)) == UPAP_AUTHACK)
used_login = 1;
}
if (secret[0] != 0 && !login_secret) {
/* password given in pap-secrets - must match */
if ((cryptpap || strcmp(passwd, secret) != 0)
- && strcmp(crypt(passwd, secret), secret) != 0) {
+ && strcmp(crypt(passwd, secret), secret) != 0)
ret = UPAP_AUTHNAK;
- warn("PAP authentication failure for %s", user);
- }
}
}
fclose(f);
* echo off means password.
*/
-static int PAM_conv (int num_msg, const struct pam_message **msg,
- struct pam_response **resp, void *appdata_ptr)
+static int PAM_conv (int num_msg,
+#ifndef SOL2
+ const
+#endif
+ struct pam_message **msg,
+ struct pam_response **resp, void *appdata_ptr)
{
int replies = 0;
struct pam_response *reply = NULL;
static void
plogout()
{
+ char *tty;
#ifdef USE_PAM
int pam_error;
}
/* Apparently the pam stuff does closelog(). */
reopen_log();
-#else /* ! USE_PAM */
- char *tty;
+#endif /* USE_PAM */
tty = devnam;
if (strncmp(tty, "/dev/", 5) == 0)
tty += 5;
logwtmp(tty, "", ""); /* Wipe out utmp logout entry */
-#endif /* ! USE_PAM */
logged_in = 0;
}
return 0;
check_access(f, filename);
- i = scan_authfile(f, "", our_name, secret, &addrs, &opts, filename);
+ i = scan_authfile(f, "", our_name, secret, &addrs, &opts, filename, 0);
ret = i >= 0 && secret[0] == 0;
BZERO(secret, sizeof(secret));
fclose(f);
check_access(f, filename);
ret = scan_authfile(f, user,
(remote_name[0]? remote_name: NULL),
- secret, NULL, NULL, filename);
+ secret, NULL, NULL, filename, 0);
fclose(f);
if (ret < 0)
return 0;
return 0;
ret = scan_authfile(f, (explicit_remote? remote_name: NULL), our_name,
- NULL, &addrs, NULL, filename);
+ NULL, &addrs, NULL, filename, 0);
fclose(f);
if (ret >= 0 && !some_ip_ok(addrs)) {
if (lacks_ipp != 0)
else if (server != NULL && server[0] == 0)
server = NULL;
- ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename);
+ ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename, 0);
+ fclose(f);
+ if (ret >= 0 && need_ip && !some_ip_ok(addrs)) {
+ if (lacks_ipp != 0)
+ *lacks_ipp = 1;
+ ret = -1;
+ }
+ if (addrs != 0)
+ free_wordlist(addrs);
+
+ return ret >= 0;
+}
+
+
+/*
+ * have_srp_secret - check whether we have a SRP file with a
+ * secret that we could possibly use for authenticating `client'
+ * on `server'. Either can be the null string, meaning we don't
+ * know the identity yet.
+ */
+static int
+have_srp_secret(client, server, need_ip, lacks_ipp)
+ char *client;
+ char *server;
+ int need_ip;
+ int *lacks_ipp;
+{
+ FILE *f;
+ int ret;
+ char *filename;
+ struct wordlist *addrs;
+
+ filename = _PATH_SRPFILE;
+ f = fopen(filename, "r");
+ if (f == NULL)
+ return 0;
+
+ if (client != NULL && client[0] == 0)
+ client = NULL;
+ else if (server != NULL && server[0] == 0)
+ server = NULL;
+
+ ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename, 0);
fclose(f);
if (ret >= 0 && need_ip && !some_ip_ok(addrs)) {
if (lacks_ipp != 0)
}
check_access(f, filename);
- ret = scan_authfile(f, client, server, secbuf, &addrs, &opts, filename);
+ ret = scan_authfile(f, client, server, secbuf, &addrs, &opts, filename, 0);
fclose(f);
if (ret < 0)
return 0;
return 1;
}
+
+/*
+ * get_srp_secret - open the SRP secret file and return the secret
+ * for authenticating the given client on the given server.
+ * (We could be either client or server).
+ */
+int
+get_srp_secret(unit, client, server, secret, am_server)
+ int unit;
+ char *client;
+ char *server;
+ char *secret;
+ int am_server;
+{
+ FILE *fp;
+ int ret;
+ char *filename;
+ struct wordlist *addrs, *opts;
+
+ if (!am_server && passwd[0] != '\0') {
+ strlcpy(secret, passwd, MAXWORDLEN);
+ } else {
+ filename = _PATH_SRPFILE;
+ addrs = NULL;
+
+ fp = fopen(filename, "r");
+ if (fp == NULL) {
+ error("Can't open srp secret file %s: %m", filename);
+ return 0;
+ }
+ check_access(fp, filename);
+
+ secret[0] = '\0';
+ ret = scan_authfile(fp, client, server, secret, &addrs, &opts,
+ filename, am_server);
+ fclose(fp);
+ if (ret < 0)
+ return 0;
+
+ if (am_server)
+ set_allowed_addrs(unit, addrs, opts);
+ else if (opts != NULL)
+ free_wordlist(opts);
+ if (addrs != NULL)
+ free_wordlist(addrs);
+ }
+
+ return 1;
+}
+
/*
* set_allowed_addrs() - set the list of allowed addresses.
* Also looks for `--' indicating options to apply for this peer
} else {
np = getnetbyname (ptr_word);
if (np != NULL && np->n_addrtype == AF_INET) {
- a = htonl (*(u_int32_t *)np->n_net);
+ a = htonl ((u_int32_t)np->n_net);
if (ptr_mask == NULL) {
/* calculate appropriate mask for net */
ah = ntohl(a);
return 0;
}
+/*
+ * auth_number - check whether the remote number is allowed to connect.
+ * Returns 1 if authorized, 0 otherwise.
+ */
+int
+auth_number()
+{
+ struct wordlist *wp = permitted_numbers;
+ int l;
+
+ /* Allow all if no authorization list. */
+ if (!wp)
+ return 1;
+
+ /* Allow if we have a match in the authorization list. */
+ while (wp) {
+ /* trailing '*' wildcard */
+ l = strlen(wp->word);
+ if ((wp->word)[l - 1] == '*')
+ l--;
+ if (!strncasecmp(wp->word, remote_number, l))
+ return 1;
+ wp = wp->next;
+ }
+
+ return 0;
+}
+
/*
* check_access - complain if a secret file has too-liberal permissions.
*/
* following words (extra options) are placed in a wordlist and
* returned in *opts.
* We assume secret is NULL or points to MAXWORDLEN bytes of space.
+ * Flags are non-zero if we need two colons in the secret in order to
+ * match.
*/
static int
-scan_authfile(f, client, server, secret, addrs, opts, filename)
+scan_authfile(f, client, server, secret, addrs, opts, filename, flags)
FILE *f;
char *client;
char *server;
struct wordlist **addrs;
struct wordlist **opts;
char *filename;
+ int flags;
{
int newline, xxx;
int got_flag, best_flag;
char word[MAXWORDLEN];
char atfile[MAXWORDLEN];
char lsecret[MAXWORDLEN];
+ char *cp;
if (addrs != NULL)
*addrs = NULL;
if (newline)
continue;
+ /*
+ * SRP-SHA1 authenticator should never be reading secrets from
+ * a file. (Authenticatee may, though.)
+ */
+ if (flags && ((cp = strchr(word, ':')) == NULL ||
+ strchr(cp + 1, ':') == NULL))
+ continue;
+
if (secret != NULL) {
/*
* Special syntax: @/pathname means read secret from file.
argv[5] = strspeed;
argv[6] = NULL;
- auth_script_pid = run_program(script, argv, 0, auth_script_done, NULL);
+ auth_script_pid = run_program(script, argv, 0, auth_script_done, NULL, 0);
}
projects / ppp.git / blobdiff