/*
* 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 1.87 2002/10/12 01:28:05 fcusack Exp $"
+#define RCSID "$Id: auth.c,v 1.117 2008/07/01 12:27:56 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 <strings.h>
#include <sys/types.h>
#include <sys/stat.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 <netinet/in.h>
#include <arpa/inet.h>
-#ifdef USE_PAM
-#include <security/pam_appl.h>
-#endif
#ifdef HAS_SHADOW
#include <shadow.h>
#endif
#include <time.h>
+#ifdef SYSTEMD
+#include <systemd/sd-daemon.h>
+#endif
+
#include "pppd.h"
#include "fsm.h"
#include "lcp.h"
#include "ecp.h"
#include "ipcp.h"
#include "upap.h"
-#include "chap.h"
+#include "chap-new.h"
+#include "eap.h"
+#ifdef USE_EAPTLS
+#include "eap-tls.h"
+#endif
#ifdef CBCP_SUPPORT
#include "cbcp.h"
#endif
#include "pathnames.h"
+#include "session.h"
-static const char rcsid[] = RCSID;
/* Bits in scan_authfile return value */
#define NONWILD_SERVER 1
/* Records which authentication operations have been completed. */
int auth_done[NUM_PPP];
-/* Set if we have successfully called plogin() */
-static int logged_in;
-
/* List of addresses which the peer may use. */
static struct permitted_ip *addresses[NUM_PPP];
static bool default_auth;
/* Hook to enable a plugin to control the idle time limit */
-int (*idle_time_hook) __P((struct ppp_idle *)) = NULL;
+int (*idle_time_hook)(struct ppp_idle *) = NULL;
/* Hook for a plugin to say whether we can possibly authenticate any peer */
-int (*pap_check_hook) __P((void)) = NULL;
+int (*pap_check_hook)(void) = NULL;
/* Hook for a plugin to check the PAP user and password */
-int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
- struct wordlist **paddrs,
- struct wordlist **popts)) = NULL;
+int (*pap_auth_hook)(char *user, char *passwd, char **msgp,
+ struct wordlist **paddrs,
+ struct wordlist **popts) = NULL;
/* Hook for a plugin to know about the PAP user logout */
-void (*pap_logout_hook) __P((void)) = NULL;
+void (*pap_logout_hook)(void) = NULL;
/* Hook for a plugin to get the PAP password for authenticating us */
-int (*pap_passwd_hook) __P((char *user, char *passwd)) = NULL;
+int (*pap_passwd_hook)(char *user, char *passwd) = NULL;
+
+/* Hook for a plugin to say if we can possibly authenticate a peer using CHAP */
+int (*chap_check_hook)(void) = NULL;
+
+/* Hook for a plugin to get the CHAP password for authenticating us */
+int (*chap_passwd_hook)(char *user, char *passwd) = NULL;
+
+#ifdef USE_EAPTLS
+/* Hook for a plugin to get the EAP-TLS password for authenticating us */
+int (*eaptls_passwd_hook)(char *user, char *passwd) = NULL;
+#endif
/* Hook for a plugin to say whether it is OK if the peer
refuses to authenticate. */
-int (*null_auth_hook) __P((struct wordlist **paddrs,
- struct wordlist **popts)) = NULL;
+int (*null_auth_hook)(struct wordlist **paddrs,
+ struct wordlist **popts) = NULL;
-int (*allowed_address_hook) __P((u_int32_t addr)) = NULL;
+int (*allowed_address_hook)(u_int32_t addr) = NULL;
+
+#ifdef HAVE_MULTILINK
+/* Hook for plugin to hear when an interface joins a multilink bundle */
+void (*multilink_join_hook)(void) = NULL;
+#endif
/* A notifier for when the peer has authenticated itself,
and we are proceeding to the network phase. */
static enum script_state auth_script_state = s_down;
static pid_t auth_script_pid = 0;
-static int used_login; /* peer authenticated against login database */
-
/*
* Option variables.
*/
bool uselogin = 0; /* Use /etc/passwd for checking PAP */
+bool session_mgmt = 0; /* Do session management (login records) */
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 */
bool auth_required = 0; /* Always require authentication from peer */
bool allow_any_ip = 0; /* Allow peer to use any IP address */
bool explicit_remote = 0; /* User specified explicit remote name */
+bool explicit_user = 0; /* Set if "user" option supplied */
+bool explicit_passwd = 0; /* Set if "password" option supplied */
char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
+#ifdef USE_EAPTLS
+char *cacert_file = NULL; /* CA certificate file (pem format) */
+char *ca_path = NULL; /* directory with CA certificates */
+char *cert_file = NULL; /* client certificate file (pem format) */
+char *privkey_file = NULL; /* client private key file (pem format) */
+char *crl_dir = NULL; /* directory containing CRL files */
+char *crl_file = NULL; /* Certificate Revocation List (CRL) file (pem format) */
+char *max_tls_version = NULL; /* Maximum TLS protocol version (default=1.2) */
+char *tls_verify_method = NULL;
+bool tls_verify_key_usage = 0;
+bool need_peer_eap = 0; /* Require peer to authenticate us */
+#endif
static char *uafname; /* name of most recent +ua file */
-extern char *crypt __P((const char *, const char *));
+extern char *crypt (const char *, const char *);
/* Prototypes for procedures local to this file. */
-static void network_phase __P((int));
-static void check_idle __P((void *));
-static void connect_time_expired __P((void *));
-static int plogin __P((char *, char *, char **));
-static void plogout __P((void));
-static int null_login __P((int));
-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 ip_addr_check __P((u_int32_t, struct permitted_ip *));
-static int scan_authfile __P((FILE *, char *, char *, char *,
- struct wordlist **, struct wordlist **,
- char *));
-static void free_wordlist __P((struct wordlist *));
-static void auth_script __P((char *));
-static void auth_script_done __P((void *));
-static void set_allowed_addrs __P((int, struct wordlist *, struct wordlist *));
-static int some_ip_ok __P((struct wordlist *));
-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 *));
+static void network_phase (int);
+static void check_idle (void *);
+static void connect_time_expired (void *);
+static int null_login (int);
+static int get_pap_passwd (char *);
+static int have_pap_secret (int *);
+static int have_chap_secret (char *, char *, int, int *);
+static int have_srp_secret(char *client, char *server, int need_ip,
+ int *lacks_ipp);
+
+#ifdef USE_EAPTLS
+static int have_eaptls_secret_server
+(char *client, char *server, int need_ip, int *lacks_ipp);
+static int have_eaptls_secret_client (char *client, char *server);
+static int scan_authfile_eaptls(FILE * f, char *client, char *server,
+ char *cli_cert, char *serv_cert,
+ char *ca_cert, char *pk,
+ struct wordlist ** addrs,
+ struct wordlist ** opts,
+ char *filename, int flags);
+#endif
+
+static int ip_addr_check (u_int32_t, struct permitted_ip *);
+static int scan_authfile(FILE *, char *, char *, char *,
+ struct wordlist **, struct wordlist **,
+ char *, int);
+static void free_wordlist (struct wordlist *);
+static void auth_script (char *);
+static void auth_script_done (void *);
+static void set_allowed_addrs (int, struct wordlist *, struct wordlist *);
+static int some_ip_ok (struct wordlist *);
+static int setupapfile (char **);
+static int privgroup (char **);
+static int set_noauth_addr (char **);
+static int set_permitted_number (char **);
+static void check_access (FILE *, char *);
+static int wordlist_count (struct wordlist *);
#ifdef MAXOCTETS
-static void check_maxoctets __P((void *));
+static void check_maxoctets (void *);
#endif
/*
&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 },
OPT_PRIO | OPT_A2STRVAL, &uafname },
{ "user", o_string, user,
- "Set name for auth with peer", OPT_PRIO | OPT_STATIC, NULL, MAXNAMELEN },
+ "Set name for auth with peer", OPT_PRIO | OPT_STATIC,
+ &explicit_user, MAXNAMELEN },
{ "password", o_string, passwd,
"Password for authenticating us to the peer",
- OPT_PRIO | OPT_STATIC | OPT_HIDE, NULL, MAXSECRETLEN },
+ OPT_PRIO | OPT_STATIC | OPT_HIDE,
+ &explicit_passwd, MAXSECRETLEN },
{ "usehostname", o_bool, &usehostname,
"Must use hostname for authentication", 1 },
&explicit_remote, MAXNAMELEN },
{ "login", o_bool, &uselogin,
- "Use system password database for PAP", 1 },
+ "Use system password database for PAP", OPT_A2COPY | 1 ,
+ &session_mgmt },
+ { "enable-session", o_bool, &session_mgmt,
+ "Enable session accounting for remote peers", OPT_PRIV | 1 },
{ "papcrypt", o_bool, &cryptpap,
"PAP passwords are encrypted", 1 },
"Set telephone number(s) which are allowed to connect",
OPT_PRIV | OPT_A2LIST },
+#ifdef USE_EAPTLS
+ { "ca", o_string, &cacert_file, "EAP-TLS CA certificate in PEM format" },
+ { "capath", o_string, &ca_path, "EAP-TLS CA certificate directory" },
+ { "cert", o_string, &cert_file, "EAP-TLS client certificate in PEM format" },
+ { "key", o_string, &privkey_file, "EAP-TLS client private key in PEM format" },
+ { "crl-dir", o_string, &crl_dir, "Use CRLs in directory" },
+ { "crl", o_string, &crl_file, "Use specific CRL file" },
+ { "max-tls-version", o_string, &max_tls_version,
+ "Maximum TLS version (1.0/1.1/1.2 (default)/1.3)" },
+ { "tls-verify-key-usage", o_bool, &tls_verify_key_usage,
+ "Verify certificate type and extended key usage" },
+ { "tls-verify-method", o_string, &tls_verify_method,
+ "Verify peer by method (none|subject|name|suffix)" },
+ { "need-peer-eap", o_bool, &need_peer_eap,
+ "Require the peer to authenticate us", 1 },
+#endif /* USE_EAPTLS */
{ NULL }
};
* setupapfile - specifies UPAP info for authenticating with peer.
*/
static int
-setupapfile(argv)
- char **argv;
+setupapfile(char **argv)
{
FILE *ufile;
int l;
+ uid_t euid;
char u[MAXNAMELEN], p[MAXSECRETLEN];
char *fname;
fname = strdup(*argv);
if (fname == NULL)
novm("+ua file name");
- seteuid(getuid());
+ euid = geteuid();
+ if (seteuid(getuid()) == -1) {
+ option_error("unable to reset uid before opening %s: %m", fname);
+ free(fname);
+ return 0;
+ }
ufile = fopen(fname, "r");
- seteuid(0);
+ if (seteuid(euid) == -1)
+ fatal("unable to regain privileges: %m");
if (ufile == NULL) {
option_error("unable to open user login data file %s", fname);
+ free(fname);
return 0;
}
check_access(ufile, fname);
/* 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);
+ free(fname);
return 0;
}
fclose(ufile);
if (l > 0 && p[l-1] == '\n')
p[l-1] = 0;
- if (override_value("user", option_priority, fname))
+ if (override_value("user", option_priority, fname)) {
strlcpy(user, u, sizeof(user));
- if (override_value("passwd", option_priority, fname))
+ explicit_user = 1;
+ }
+ if (override_value("passwd", option_priority, fname)) {
strlcpy(passwd, p, sizeof(passwd));
+ explicit_passwd = 1;
+ }
+ free(fname);
return (1);
}
* privgroup - allow members of the group to have privileged access.
*/
static int
-privgroup(argv)
- char **argv;
+privgroup(char **argv)
{
struct group *g;
int i;
* Equivalent to specifying an entry like `"" * "" addr' in pap-secrets.
*/
static int
-set_noauth_addr(argv)
- char **argv;
+set_noauth_addr(char **argv)
{
char *addr = *argv;
int l = strlen(addr) + 1;
* set_permitted_number - set remote telephone number(s) that may connect.
*/
static int
-set_permitted_number(argv)
- char **argv;
+set_permitted_number(char **argv)
{
char *number = *argv;
int l = strlen(number) + 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)
- int unit;
+link_required(int unit)
+{
+}
+
+/*
+ * Bring the link up to the point of being able to do ppp.
+ */
+void start_link(int unit)
{
+ status = EXIT_CONNECT_FAILED;
+ new_phase(PHASE_SERIALCONN);
+
+ hungup = 0;
+ devfd = the_channel->connect();
+ 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);
+ 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)();
}
/*
* physical layer down.
*/
void
-link_terminated(unit)
- int unit;
+link_terminated(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.");
+ session_end(devnam);
+
+ 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);
+ if (master_detach && !detached)
+ detach();
+ } else
+ mp_bundle_terminated();
+ } else
+ new_phase(PHASE_DEAD);
}
/*
* LCP has gone down; it will either die or try to re-establish.
*/
void
-link_down(unit)
- int unit;
+link_down(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);
}
/*
* Proceed to the Dead, Authenticate or Network phase as appropriate.
*/
void
-link_established(unit)
- int unit;
+link_established(int unit)
{
int auth;
lcp_options *wo = &lcp_wantoptions[unit];
lcp_options *go = &lcp_gotoptions[unit];
lcp_options *ho = &lcp_hisoptions[unit];
+#ifdef USE_EAPTLS
+ lcp_options *ao = &lcp_allowoptions[unit];
+#endif
int i;
struct protent *protp;
/*
* 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 && !(go->neg_upap || go->neg_chap)) {
+ if (!auth_required && noauth_addrs != NULL)
+ set_allowed_addrs(unit, NULL, NULL);
+
+ 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;
}
}
+#ifdef USE_EAPTLS
+ if (need_peer_eap && !ao->neg_eap) {
+ warn("eap required to authenticate us but no suitable secrets");
+ lcp_close(unit, "couldn't negotiate eap");
+ status = EXIT_AUTH_TOPEER_FAILED;
+ return;
+ }
+
+ if (need_peer_eap && !ho->neg_eap) {
+ warn("peer doesn't want to authenticate us with eap");
+ lcp_close(unit, "couldn't negotiate eap");
+ status = EXIT_PEER_AUTH_FAILED;
+ return;
+ }
+#endif
+
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) {
+ /* If a blank password was explicitly given as an option, trust
+ the user and don't try to look up one. */
+ if (passwd[0] == 0 && !explicit_passwd) {
passwd_from_file = 1;
if (!get_pap_passwd(passwd))
error("No secret found for PAP login");
* Proceed to the network phase.
*/
static void
-network_phase(unit)
- int unit;
+network_phase(int unit)
{
lcp_options *go = &lcp_gotoptions[unit];
/*
* If the peer had to authenticate, run the auth-up script now.
*/
- if (go->neg_chap || go->neg_upap) {
- notify(auth_up_notifier, 0);
+ notify(auth_up_notifier, 0);
+ if (go->neg_chap || go->neg_upap || go->neg_eap) {
auth_state = s_up;
if (auth_script_state == s_down && auth_script_pid == 0) {
auth_script_state = s_up;
}
void
-start_networks(unit)
- int unit;
+start_networks(int unit)
{
int i;
struct protent *protp;
#ifdef HAVE_MULTILINK
if (multilink) {
if (mp_join_bundle()) {
+ if (multilink_join_hook)
+ (*multilink_join_hook)();
if (updetach && !nodetach)
detach();
return;
}
void
-continue_networks(unit)
- int unit;
+continue_networks(int unit)
{
int i;
struct protent *protp;
* The peer has failed to authenticate himself using `protocol'.
*/
void
-auth_peer_fail(unit, protocol)
- int unit, protocol;
+auth_peer_fail(int unit, int protocol)
{
/*
* Authentication failure: take the link down
*/
- lcp_close(unit, "Authentication failed");
status = EXIT_PEER_AUTH_FAILED;
+ lcp_close(unit, "Authentication failed");
}
/*
* The peer has been successfully authenticated using `protocol'.
*/
void
-auth_peer_success(unit, protocol, prot_flavor, name, namelen)
- int unit, protocol, prot_flavor;
- char *name;
- int namelen;
+auth_peer_success(int unit, int protocol, int prot_flavor,
+ char *name, int namelen)
{
int bit;
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;
* We have failed to authenticate ourselves to the peer using `protocol'.
*/
void
-auth_withpeer_fail(unit, protocol)
- int unit, protocol;
+auth_withpeer_fail(int unit, int protocol)
{
if (passwd_from_file)
BZERO(passwd, MAXSECRETLEN);
* 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");
}
/*
* We have successfully authenticated ourselves with the peer using `protocol'.
*/
void
-auth_withpeer_success(unit, protocol, prot_flavor)
- int unit, protocol, prot_flavor;
+auth_withpeer_success(int unit, int protocol, int 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;
* np_up - a network protocol has come up.
*/
void
-np_up(unit, proto)
- int unit, proto;
+np_up(int unit, int proto)
{
int tlim;
/*
* Detach now, if the updetach option was given.
*/
- if (updetach && !nodetach)
+ if (updetach && !nodetach) {
+ dbglog("updetach is set. Now detaching.");
detach();
+#ifdef SYSTEMD
+ } else if (nodetach && up_sdnotify) {
+ dbglog("up_sdnotify is set. Now notifying systemd: READY=1");
+ sd_notify(0, "READY=1");
+#endif
+ }
}
++num_np_up;
}
* np_down - a network protocol has gone down.
*/
void
-np_down(unit, proto)
- int unit, proto;
+np_down(int unit, int proto)
{
if (--num_np_up == 0) {
UNTIMEOUT(check_idle, NULL);
* np_finished - a network protocol has finished using the link.
*/
void
-np_finished(unit, proto)
- int unit, proto;
+np_finished(int unit, int proto)
{
if (--num_np_open <= 0) {
/* no further use for the link: shut up shop. */
#ifdef MAXOCTETS
static void
-check_maxoctets(arg)
- void *arg;
+check_maxoctets(void *arg)
{
- int diff;
unsigned int used;
update_link_stats(ifunit);
used = link_stats.bytes_in+link_stats.bytes_out;
break;
}
- diff = maxoctets - used;
- if(diff < 0) {
+ if (used > maxoctets) {
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);
}
* enough that we can shut it down.
*/
static void
-check_idle(arg)
- void *arg;
+check_idle(void *arg)
{
struct ppp_idle idle;
time_t itime;
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);
}
* connect_time_expired - log a message and close the connection.
*/
static void
-connect_time_expired(arg)
- void *arg;
+connect_time_expired(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 */
}
/*
* auth_check_options - called to check authentication options.
*/
void
-auth_check_options()
+auth_check_options(void)
{
lcp_options *wo = &lcp_wantoptions[0];
int can_auth;
/* Default our_name to hostname, and user to our_name */
if (our_name[0] == 0 || usehostname)
strlcpy(our_name, hostname, sizeof(our_name));
- if (user[0] == 0)
+ /* If a blank username was explicitly given as an option, trust
+ the user and don't use our_name */
+ if (user[0] == 0 && !explicit_user)
strlcpy(user, our_name, sizeof(user));
/*
if (wo->chap_mdtype)
wo->neg_chap = 1;
- /* If authentication is required, ask peer for CHAP or PAP. */
+ /* 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);
+ }
+
+#ifdef USE_EAPTLS
+ if (!can_auth && wo->neg_eap) {
+ can_auth =
+ have_eaptls_secret_server((explicit_remote ? remote_name :
+ NULL), our_name, 1, &lacks_ip);
+
+ }
+#endif
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);
+ }
}
/*
* to use for authenticating ourselves and/or the peer.
*/
void
-auth_reset(unit)
- int unit;
+auth_reset(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 || explicit_passwd) ||
+ (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)
+#ifdef USE_EAPTLS
+ || have_eaptls_secret_client(user, (explicit_remote? remote_name: NULL))
+#endif
+ );
+ 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)
+#ifdef USE_EAPTLS
+ && !have_eaptls_secret_server((explicit_remote? remote_name: NULL),
+ our_name, 1, NULL)
+#endif
+ )
+ go->neg_eap = 0;
}
* In either case, msg points to an appropriate message.
*/
int
-check_passwd(unit, auser, userlen, apasswd, passwdlen, msg)
- int unit;
- char *auser;
- int userlen;
- char *apasswd;
- int passwdlen;
- char **msg;
+check_passwd(int unit,
+ char *auser, int userlen,
+ char *apasswd, int passwdlen, char **msg)
{
int ret;
char *filename;
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 */
- if ((ret = plogin(user, passwd, msg)) == UPAP_AUTHACK)
- used_login = 1;
+ if (session_full(user, passwd, devnam, msg) == 0) {
+ ret = UPAP_AUTHNAK;
+ }
+ } else if (session_mgmt) {
+ if (session_check(user, NULL, devnam, NULL) == 0) {
+ warn("Peer %q failed PAP Session verification", user);
+ ret = UPAP_AUTHNAK;
+ }
}
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)
- ret = UPAP_AUTHNAK;
+ if (cryptpap || strcmp(passwd, secret) != 0) {
+ char *cbuf = crypt(passwd, secret);
+ if (!cbuf || strcmp(cbuf, secret) != 0)
+ ret = UPAP_AUTHNAK;
+ }
}
}
fclose(f);
return ret;
}
-/*
- * This function is needed for PAM.
- */
-
-#ifdef USE_PAM
-/* Static variables used to communicate between the conversation function
- * and the server_login function
- */
-static char *PAM_username;
-static char *PAM_password;
-static int PAM_error = 0;
-static pam_handle_t *pamh = NULL;
-
-/* PAM conversation function
- * Here we assume (for now, at least) that echo on means login name, and
- * echo off means password.
- */
-
-static int PAM_conv (int num_msg, const struct pam_message **msg,
- struct pam_response **resp, void *appdata_ptr)
-{
- int replies = 0;
- struct pam_response *reply = NULL;
-
-#define COPY_STRING(s) (s) ? strdup(s) : NULL
-
- reply = malloc(sizeof(struct pam_response) * num_msg);
- if (!reply) return PAM_CONV_ERR;
-
- for (replies = 0; replies < num_msg; replies++) {
- switch (msg[replies]->msg_style) {
- case PAM_PROMPT_ECHO_ON:
- reply[replies].resp_retcode = PAM_SUCCESS;
- reply[replies].resp = COPY_STRING(PAM_username);
- /* PAM frees resp */
- break;
- case PAM_PROMPT_ECHO_OFF:
- reply[replies].resp_retcode = PAM_SUCCESS;
- reply[replies].resp = COPY_STRING(PAM_password);
- /* PAM frees resp */
- break;
- case PAM_TEXT_INFO:
- /* fall through */
- case PAM_ERROR_MSG:
- /* ignore it, but pam still wants a NULL response... */
- reply[replies].resp_retcode = PAM_SUCCESS;
- reply[replies].resp = NULL;
- break;
- default:
- /* Must be an error of some sort... */
- free (reply);
- PAM_error = 1;
- return PAM_CONV_ERR;
- }
- }
- *resp = reply;
- return PAM_SUCCESS;
-}
-
-static struct pam_conv PAM_conversation = {
- &PAM_conv,
- NULL
-};
-#endif /* USE_PAM */
-
-/*
- * plogin - Check the user name and password against the system
- * password database, and login the user if OK.
- *
- * returns:
- * UPAP_AUTHNAK: Login failed.
- * UPAP_AUTHACK: Login succeeded.
- * In either case, msg points to an appropriate message.
- */
-
-static int
-plogin(user, passwd, msg)
- char *user;
- char *passwd;
- char **msg;
-{
- char *tty;
-
-#ifdef USE_PAM
- int pam_error;
-
- pam_error = pam_start ("ppp", user, &PAM_conversation, &pamh);
- if (pam_error != PAM_SUCCESS) {
- *msg = (char *) pam_strerror (pamh, pam_error);
- reopen_log();
- return UPAP_AUTHNAK;
- }
- /*
- * Define the fields for the credential validation
- */
-
- PAM_username = user;
- PAM_password = passwd;
- PAM_error = 0;
- pam_set_item (pamh, PAM_TTY, devnam); /* this might be useful to some modules */
-
- /*
- * Validate the user
- */
- pam_error = pam_authenticate (pamh, PAM_SILENT);
- if (pam_error == PAM_SUCCESS && !PAM_error) {
- pam_error = pam_acct_mgmt (pamh, PAM_SILENT);
- if (pam_error == PAM_SUCCESS)
- pam_error = pam_open_session (pamh, PAM_SILENT);
- }
-
- *msg = (char *) pam_strerror (pamh, pam_error);
-
- /*
- * Clean up the mess
- */
- reopen_log(); /* apparently the PAM stuff does closelog() */
- PAM_username = NULL;
- PAM_password = NULL;
- if (pam_error != PAM_SUCCESS)
- return UPAP_AUTHNAK;
-#else /* #ifdef USE_PAM */
-
-/*
- * Use the non-PAM methods directly
- */
-
-#ifdef HAS_SHADOW
- struct spwd *spwd;
- struct spwd *getspnam();
-#endif
- struct passwd *pw = getpwnam(user);
-
- endpwent();
- if (pw == NULL)
- return (UPAP_AUTHNAK);
-
-#ifdef HAS_SHADOW
- spwd = getspnam(user);
- endspent();
- if (spwd) {
- /* check the age of the password entry */
- long now = time(NULL) / 86400L;
-
- if ((spwd->sp_expire > 0 && now >= spwd->sp_expire)
- || ((spwd->sp_max >= 0 && spwd->sp_max < 10000)
- && spwd->sp_lstchg >= 0
- && now >= spwd->sp_lstchg + spwd->sp_max)) {
- warn("Password for %s has expired", user);
- return (UPAP_AUTHNAK);
- }
- pw->pw_passwd = spwd->sp_pwdp;
- }
-#endif
-
- /*
- * If no passwd, don't let them login.
- */
- if (pw->pw_passwd == NULL || strlen(pw->pw_passwd) < 2
- || strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd) != 0)
- return (UPAP_AUTHNAK);
-
-#endif /* #ifdef USE_PAM */
-
- /*
- * Write a wtmp entry for this user.
- */
-
- tty = devnam;
- if (strncmp(tty, "/dev/", 5) == 0)
- tty += 5;
- logwtmp(tty, user, ifname); /* Add wtmp login entry */
-
-#if defined(_PATH_LASTLOG) && !defined(USE_PAM)
- if (pw != (struct passwd *)NULL) {
- struct lastlog ll;
- int fd;
-
- if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
- (void)lseek(fd, (off_t)(pw->pw_uid * sizeof(ll)), SEEK_SET);
- memset((void *)&ll, 0, sizeof(ll));
- (void)time(&ll.ll_time);
- (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
- (void)write(fd, (char *)&ll, sizeof(ll));
- (void)close(fd);
- }
- }
-#endif /* _PATH_LASTLOG and not USE_PAM */
-
- info("user %s logged in", user);
- logged_in = 1;
-
- return (UPAP_AUTHACK);
-}
-
-/*
- * plogout - Logout the user.
- */
-static void
-plogout()
-{
-#ifdef USE_PAM
- int pam_error;
-
- if (pamh != NULL) {
- pam_error = pam_close_session (pamh, PAM_SILENT);
- pam_end (pamh, pam_error);
- pamh = NULL;
- }
- /* Apparently the pam stuff does closelog(). */
- reopen_log();
-#else /* ! USE_PAM */
- char *tty;
-
- tty = devnam;
- if (strncmp(tty, "/dev/", 5) == 0)
- tty += 5;
- logwtmp(tty, "", ""); /* Wipe out utmp logout entry */
-#endif /* ! USE_PAM */
- logged_in = 0;
-}
-
-
/*
* null_login - Check if a username of "" and a password of "" are
* acceptable, and iff so, set the list of acceptable IP addresses
* and return 1.
*/
static int
-null_login(unit)
- int unit;
+null_login(int unit)
{
char *filename;
FILE *f;
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);
* Assumes passwd points to MAXSECRETLEN bytes of space (if non-null).
*/
static int
-get_pap_passwd(passwd)
- char *passwd;
+get_pap_passwd(char *passwd)
{
char *filename;
FILE *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;
* secrets that we could possibly use for authenticating the peer.
*/
static int
-have_pap_secret(lacks_ipp)
- int *lacks_ipp;
+have_pap_secret(int *lacks_ipp)
{
FILE *f;
int ret;
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)
* know the identity yet.
*/
static int
-have_chap_secret(client, server, need_ip, lacks_ipp)
- char *client;
- char *server;
- int need_ip;
- int *lacks_ipp;
+have_chap_secret(char *client, char *server,
+ int need_ip, int *lacks_ipp)
{
FILE *f;
int ret;
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(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)
* (We could be either client or server).
*/
int
-get_secret(unit, client, server, secret, secret_len, am_server)
- int unit;
- char *client;
- char *server;
- char *secret;
- int *secret_len;
- int am_server;
+get_secret(int unit, char *client, char *server,
+ char *secret, int *secret_len, int am_server)
{
FILE *f;
int ret, len;
}
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(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
* and leaves the following words in extra_options.
*/
static void
-set_allowed_addrs(unit, addrs, opts)
- int unit;
- struct wordlist *addrs;
- struct wordlist *opts;
+set_allowed_addrs(int unit, struct wordlist *addrs,
+ struct wordlist *opts)
{
int n;
struct wordlist *ap, **plink;
} 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);
* a given IP address. Returns 1 if authorized, 0 otherwise.
*/
int
-auth_ip_addr(unit, addr)
- int unit;
- u_int32_t addr;
+auth_ip_addr(int unit, u_int32_t addr)
{
int ok;
}
static int
-ip_addr_check(addr, addrs)
- u_int32_t addr;
- struct permitted_ip *addrs;
+ip_addr_check(u_int32_t addr, struct permitted_ip *addrs)
{
for (; ; ++addrs)
if ((addr & addrs->mask) == addrs->base)
* addr is in network byte order.
*/
int
-bad_ip_adrs(addr)
- u_int32_t addr;
+bad_ip_adrs(u_int32_t addr)
{
addr = ntohl(addr);
return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
* IP address(es).
*/
static int
-some_ip_ok(addrs)
- struct wordlist *addrs;
+some_ip_ok(struct wordlist *addrs)
{
for (; addrs != 0; addrs = addrs->next) {
if (addrs->word[0] == '-')
* Returns 1 if authorized, 0 otherwise.
*/
int
-auth_number()
+auth_number(void)
{
struct wordlist *wp = permitted_numbers;
int l;
* check_access - complain if a secret file has too-liberal permissions.
*/
static void
-check_access(f, filename)
- FILE *f;
- char *filename;
+check_access(FILE *f, char *filename)
{
struct stat sbuf;
* 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)
- FILE *f;
- char *client;
- char *server;
- char *secret;
- struct wordlist **addrs;
- struct wordlist **opts;
- char *filename;
+scan_authfile(FILE *f, char *client, char *server,
+ char *secret, 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.
* wordlist_count - return the number of items in a wordlist
*/
static int
-wordlist_count(wp)
- struct wordlist *wp;
+wordlist_count(struct wordlist *wp)
{
int n;
* free_wordlist - release memory allocated for a wordlist.
*/
static void
-free_wordlist(wp)
- struct wordlist *wp;
+free_wordlist(struct wordlist *wp)
{
struct wordlist *next;
* has finished.
*/
static void
-auth_script_done(arg)
- void *arg;
+auth_script_done(void *arg)
{
auth_script_pid = 0;
switch (auth_script_state) {
* interface-name peer-name real-user tty speed
*/
static void
-auth_script(script)
- char *script;
+auth_script(char *script)
{
char strspeed[32];
struct passwd *pw;
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);
+}
+
+
+#ifdef USE_EAPTLS
+static int
+have_eaptls_secret_server(char *client, char *server,
+ int need_ip, int *lacks_ipp)
+{
+ FILE *f;
+ int ret;
+ char *filename;
+ struct wordlist *addrs;
+ char servcertfile[MAXWORDLEN];
+ char clicertfile[MAXWORDLEN];
+ char cacertfile[MAXWORDLEN];
+ char pkfile[MAXWORDLEN];
+
+ filename = _PATH_EAPTLSSERVFILE;
+ 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_eaptls(f, client, server, clicertfile, servcertfile,
+ cacertfile, pkfile, &addrs, NULL, filename,
+ 0);
+
+ fclose(f);
+
+/*
+ if (ret >= 0 && !eaptls_init_ssl(1, cacertfile, servcertfile,
+ clicertfile, pkfile))
+ ret = -1;
+*/
+
+ 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;
+}
+
+
+static int
+have_eaptls_secret_client(char *client, char *server)
+{
+ FILE *f;
+ int ret;
+ char *filename;
+ struct wordlist *addrs = NULL;
+ char servcertfile[MAXWORDLEN];
+ char clicertfile[MAXWORDLEN];
+ char cacertfile[MAXWORDLEN];
+ char pkfile[MAXWORDLEN];
+
+ if (client != NULL && client[0] == 0)
+ client = NULL;
+ else if (server != NULL && server[0] == 0)
+ server = NULL;
+
+ if ((cacert_file || ca_path) && cert_file && privkey_file)
+ return 1;
+
+ filename = _PATH_EAPTLSCLIFILE;
+ f = fopen(filename, "r");
+ if (f == NULL)
+ return 0;
+
+ ret =
+ scan_authfile_eaptls(f, client, server, clicertfile, servcertfile,
+ cacertfile, pkfile, &addrs, NULL, filename,
+ 0);
+ fclose(f);
+
+/*
+ if (ret >= 0 && !eaptls_init_ssl(0, cacertfile, clicertfile,
+ servcertfile, pkfile))
+ ret = -1;
+*/
+
+ if (addrs != 0)
+ free_wordlist(addrs);
+
+ return ret >= 0;
+}
+
+
+static int
+scan_authfile_eaptls(FILE *f, char *client, char *server,
+ char *cli_cert, char *serv_cert, char *ca_cert,
+ char *pk, struct wordlist **addrs,
+ struct wordlist **opts,
+ char *filename, int flags)
+{
+ int newline;
+ int got_flag, best_flag;
+ struct wordlist *ap, *addr_list, *alist, **app;
+ char word[MAXWORDLEN];
+
+ if (addrs != NULL)
+ *addrs = NULL;
+ if (opts != NULL)
+ *opts = NULL;
+ addr_list = NULL;
+ if (!getword(f, word, &newline, filename))
+ return -1; /* file is empty??? */
+ newline = 1;
+ best_flag = -1;
+ for (;;) {
+ /*
+ * Skip until we find a word at the start of a line.
+ */
+ while (!newline && getword(f, word, &newline, filename));
+ if (!newline)
+ break; /* got to end of file */
+
+ /*
+ * Got a client - check if it's a match or a wildcard.
+ */
+ got_flag = 0;
+ if (client != NULL && strcmp(word, client) != 0 && !ISWILD(word)) {
+ newline = 0;
+ continue;
+ }
+ if (!ISWILD(word))
+ got_flag = NONWILD_CLIENT;
+
+ /*
+ * Now get a server and check if it matches.
+ */
+ if (!getword(f, word, &newline, filename))
+ break;
+ if (newline)
+ continue;
+ if (!ISWILD(word)) {
+ if (server != NULL && strcmp(word, server) != 0)
+ continue;
+ got_flag |= NONWILD_SERVER;
+ }
+
+ /*
+ * Got some sort of a match - see if it's better than what
+ * we have already.
+ */
+ if (got_flag <= best_flag)
+ continue;
+
+ /*
+ * Get the cli_cert
+ */
+ if (!getword(f, word, &newline, filename))
+ break;
+ if (newline)
+ continue;
+ if (strcmp(word, "-") != 0) {
+ strlcpy(cli_cert, word, MAXWORDLEN);
+ } else
+ cli_cert[0] = 0;
+
+ /*
+ * Get serv_cert
+ */
+ if (!getword(f, word, &newline, filename))
+ break;
+ if (newline)
+ continue;
+ if (strcmp(word, "-") != 0) {
+ strlcpy(serv_cert, word, MAXWORDLEN);
+ } else
+ serv_cert[0] = 0;
+
+ /*
+ * Get ca_cert
+ */
+ if (!getword(f, word, &newline, filename))
+ break;
+ if (newline)
+ continue;
+ strlcpy(ca_cert, word, MAXWORDLEN);
+
+ /*
+ * Get pk
+ */
+ if (!getword(f, word, &newline, filename))
+ break;
+ if (newline)
+ continue;
+ strlcpy(pk, word, MAXWORDLEN);
+
+
+ /*
+ * Now read address authorization info and make a wordlist.
+ */
+ app = &alist;
+ for (;;) {
+ if (!getword(f, word, &newline, filename) || newline)
+ break;
+ ap = (struct wordlist *)
+ malloc(sizeof(struct wordlist) + strlen(word) + 1);
+ if (ap == NULL)
+ novm("authorized addresses");
+ ap->word = (char *) (ap + 1);
+ strcpy(ap->word, word);
+ *app = ap;
+ app = &ap->next;
+ }
+ *app = NULL;
+ /*
+ * This is the best so far; remember it.
+ */
+ best_flag = got_flag;
+ if (addr_list)
+ free_wordlist(addr_list);
+ addr_list = alist;
+
+ if (!newline)
+ break;
+ }
+
+ /* scan for a -- word indicating the start of options */
+ for (app = &addr_list; (ap = *app) != NULL; app = &ap->next)
+ if (strcmp(ap->word, "--") == 0)
+ break;
+ /* ap = start of options */
+ if (ap != NULL) {
+ ap = ap->next; /* first option */
+ free(*app); /* free the "--" word */
+ *app = NULL; /* terminate addr list */
+ }
+ if (opts != NULL)
+ *opts = ap;
+ else if (ap != NULL)
+ free_wordlist(ap);
+ if (addrs != NULL)
+ *addrs = addr_list;
+ else if (addr_list != NULL)
+ free_wordlist(addr_list);
+
+ return best_flag;
}
+
+
+int
+get_eaptls_secret(int unit, char *client, char *server,
+ char *clicertfile, char *servcertfile, char *cacertfile,
+ char *capath, char *pkfile, int am_server)
+{
+ FILE *fp;
+ int ret;
+ char *filename = NULL;
+ struct wordlist *addrs = NULL;
+ struct wordlist *opts = NULL;
+
+ /* maybe overkill, but it eases debugging */
+ bzero(clicertfile, MAXWORDLEN);
+ bzero(servcertfile, MAXWORDLEN);
+ bzero(cacertfile, MAXWORDLEN);
+ bzero(capath, MAXWORDLEN);
+ bzero(pkfile, MAXWORDLEN);
+
+ /* the ca+cert+privkey can also be specified as options */
+ if (!am_server && (cacert_file || ca_path) && cert_file && privkey_file )
+ {
+ strlcpy( clicertfile, cert_file, MAXWORDLEN );
+ if (cacert_file)
+ strlcpy( cacertfile, cacert_file, MAXWORDLEN );
+ if (ca_path)
+ strlcpy( capath, ca_path, MAXWORDLEN );
+ strlcpy( pkfile, privkey_file, MAXWORDLEN );
+ }
+ else
+ {
+ filename = (am_server ? _PATH_EAPTLSSERVFILE : _PATH_EAPTLSCLIFILE);
+ addrs = NULL;
+
+ fp = fopen(filename, "r");
+ if (fp == NULL)
+ {
+ error("Can't open eap-tls secret file %s: %m", filename);
+ return 0;
+ }
+
+ check_access(fp, filename);
+
+ ret = scan_authfile_eaptls(fp, client, server, clicertfile, servcertfile,
+ cacertfile, pkfile, &addrs, &opts, filename, 0);
+
+ fclose(fp);
+
+ if (ret < 0) return 0;
+ }
+
+ if (eaptls_passwd_hook)
+ {
+ dbglog( "Calling eaptls password hook" );
+ if ( (*eaptls_passwd_hook)(pkfile, passwd) < 0)
+ {
+ error("Unable to obtain EAP-TLS password for %s (%s) from plugin",
+ client, pkfile);
+ 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;
+}
+#endif
projects / ppp.git / blobdiff