/*
* 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. 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(s) of the authors of this software must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission.
+ *
+ * 4. 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.
*/
-#ifndef lint
-static const char rcsid[] = "$Id: auth.c,v 1.56 1999/08/12 04:11:20 paulus Exp $";
-#endif
+#define RCSID "$Id: auth.c,v 1.96 2004/10/24 23:26:19 paulus Exp $"
#include <stdio.h>
#include <stddef.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
#define PW_PPP PW_LOGIN
#endif
#endif
+#include <time.h>
#include "pppd.h"
#include "fsm.h"
#include "lcp.h"
+#include "ccp.h"
+#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
#include "pathnames.h"
+static const char rcsid[] = RCSID;
+
/* Bits in scan_authfile return value */
#define NONWILD_SERVER 1
#define NONWILD_CLIENT 2
/* Records which authentication operations haven't completed yet. */
static int auth_pending[NUM_PPP];
+/* 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];
+/* Wordlist giving addresses which the peer may use
+ 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;
/* Set if we got the contents of passwd[] from the pap-secrets file. */
static int passwd_from_file;
+/* Set if we require authentication only because we have a default route. */
+static bool default_auth;
+
+/* Hook to enable a plugin to control the idle time limit */
+int (*idle_time_hook) __P((struct ppp_idle *)) = NULL;
+
+/* Hook for a plugin to say whether we can possibly authenticate any peer */
+int (*pap_check_hook) __P((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;
+
+/* Hook for a plugin to know about the PAP user logout */
+void (*pap_logout_hook) __P((void)) = NULL;
+
+/* 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,
+ struct wordlist **popts)) = NULL;
+
+int (*allowed_address_hook) __P((u_int32_t addr)) = NULL;
+
+/* A notifier for when the peer has authenticated itself,
+ and we are proceeding to the network phase. */
+struct notifier *auth_up_notifier = NULL;
+
+/* A notifier for when the link goes down. */
+struct notifier *link_down_notifier = NULL;
+
/*
* This is used to ensure that we don't start an auth-up/down
* script while one is already running.
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 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 */
+#else
+bool refuse_mschap = 1; /* Don't wanna auth. ourselves with MS-CHAP */
+bool refuse_mschap_v2 = 1; /* Don't wanna auth. ourselves with MS-CHAPv2 */
+#endif
bool usehostname = 0; /* Use hostname for our_name */
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 */
char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
-/* Bits in auth_pending[] */
-#define PAP_WITHPEER 1
-#define PAP_PEER 2
-#define CHAP_WITHPEER 4
-#define CHAP_PEER 8
+static char *uafname; /* name of most recent +ua file */
extern char *crypt __P((const char *, const char *));
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 **, int *));
+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 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 **, char *));
+ struct wordlist **, struct wordlist **,
+ char *, int));
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 *));
+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 *));
+
+#ifdef MAXOCTETS
+static void check_maxoctets __P((void *));
+#endif
/*
* Authentication-related options.
*/
option_t auth_options[] = {
+ { "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,
+ &allow_any_ip },
{ "require-pap", o_bool, &lcp_wantoptions[0].neg_upap,
- "Require PAP authentication from peer", 1, &auth_required },
+ "Require PAP authentication from peer",
+ OPT_PRIOSUB | 1, &auth_required },
{ "+pap", o_bool, &lcp_wantoptions[0].neg_upap,
- "Require PAP authentication from peer", 1, &auth_required },
+ "Require PAP authentication from peer",
+ OPT_ALIAS | OPT_PRIOSUB | 1, &auth_required },
+ { "require-chap", o_bool, &auth_required,
+ "Require CHAP authentication from peer",
+ 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_A2OR | MDTYPE_MD5,
+ &lcp_wantoptions[0].chap_mdtype },
+#ifdef CHAPMS
+ { "require-mschap", o_bool, &auth_required,
+ "Require MS-CHAP authentication from peer",
+ 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_A2OR | MDTYPE_MICROSOFT,
+ &lcp_wantoptions[0].chap_mdtype },
+ { "require-mschap-v2", o_bool, &auth_required,
+ "Require MS-CHAPv2 authentication from peer",
+ 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_A2OR | MDTYPE_MICROSOFT_V2,
+ &lcp_wantoptions[0].chap_mdtype },
+#endif
+
{ "refuse-pap", o_bool, &refuse_pap,
"Don't agree to auth to peer with PAP", 1 },
{ "-pap", o_bool, &refuse_pap,
- "Don't allow PAP authentication with peer", 1 },
- { "require-chap", o_bool, &lcp_wantoptions[0].neg_chap,
- "Require CHAP authentication from peer", 1, &auth_required },
- { "+chap", o_bool, &lcp_wantoptions[0].neg_chap,
- "Require CHAP authentication from peer", 1, &auth_required },
+ "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", 1 },
+ "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", 1 },
+ "Don't allow CHAP authentication with peer",
+ OPT_ALIAS | OPT_A2CLRB | MDTYPE_MD5,
+ &lcp_allowoptions[0].chap_mdtype },
+#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 },
+ { "-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 },
+ { "-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_PRIV|OPT_STATIC, NULL, MAXNAMELEN },
+ OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXNAMELEN },
+
+ { "+ua", o_special, (void *)setupapfile,
+ "Get PAP user and password from file",
+ OPT_PRIO | OPT_A2STRVAL, &uafname },
+
{ "user", o_string, user,
- "Set name for auth with peer", OPT_STATIC, NULL, MAXNAMELEN },
+ "Set name for auth with peer", OPT_PRIO | OPT_STATIC, NULL, MAXNAMELEN },
+
+ { "password", o_string, passwd,
+ "Password for authenticating us to the peer",
+ OPT_PRIO | OPT_STATIC | OPT_HIDE, NULL, MAXSECRETLEN },
+
{ "usehostname", o_bool, &usehostname,
"Must use hostname for authentication", 1 },
+
{ "remotename", o_string, remote_name,
- "Set remote name for authentication", OPT_STATIC,
+ "Set remote name for authentication", OPT_PRIO | OPT_STATIC,
&explicit_remote, MAXNAMELEN },
- { "auth", o_bool, &auth_required,
- "Require authentication from peer", 1 },
- { "noauth", o_bool, &auth_required,
- "Don't require peer to authenticate", OPT_PRIV, &allow_any_ip },
- { "login", o_bool, &uselogin,
+
+ { "login", o_bool, &uselogin,
"Use system password database for PAP", 1 },
+
{ "papcrypt", o_bool, &cryptpap,
"PAP passwords are encrypted", 1 },
- { "+ua", o_special, setupapfile,
- "Get PAP user and password from file" },
- { "password", o_string, passwd,
- "Password for authenticating us to the peer", OPT_STATIC,
- NULL, MAXSECRETLEN },
- { "privgroup", o_special, privgroup,
- "Allow group members to use privileged options", OPT_PRIV },
+
+ { "privgroup", o_special, (void *)privgroup,
+ "Allow group members to use privileged options", OPT_PRIV | OPT_A2LIST },
+
+ { "allow-ip", o_special, (void *)set_noauth_addr,
+ "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 }
};
setupapfile(argv)
char **argv;
{
- FILE * ufile;
+ FILE *ufile;
int l;
+ char u[MAXNAMELEN], p[MAXSECRETLEN];
+ char *fname;
lcp_allowoptions[0].neg_upap = 1;
/* open user info file */
+ fname = strdup(*argv);
+ if (fname == NULL)
+ novm("+ua file name");
seteuid(getuid());
- ufile = fopen(*argv, "r");
+ ufile = fopen(fname, "r");
seteuid(0);
if (ufile == NULL) {
- option_error("unable to open user login data file %s", *argv);
+ option_error("unable to open user login data file %s", fname);
return 0;
}
- check_access(ufile, *argv);
+ check_access(ufile, fname);
+ uafname = fname;
/* get username */
- if (fgets(user, MAXNAMELEN - 1, ufile) == NULL
- || fgets(passwd, MAXSECRETLEN - 1, ufile) == NULL){
- option_error("unable to read user login data file %s", *argv);
+ if (fgets(u, MAXNAMELEN - 1, ufile) == NULL
+ || fgets(p, MAXSECRETLEN - 1, ufile) == NULL) {
+ fclose(ufile);
+ option_error("unable to read user login data file %s", fname);
return 0;
}
fclose(ufile);
/* get rid of newlines */
- l = strlen(user);
- if (l > 0 && user[l-1] == '\n')
- user[l-1] = 0;
- l = strlen(passwd);
- if (l > 0 && passwd[l-1] == '\n')
- passwd[l-1] = 0;
+ l = strlen(u);
+ if (l > 0 && u[l-1] == '\n')
+ u[l-1] = 0;
+ l = strlen(p);
+ if (l > 0 && p[l-1] == '\n')
+ p[l-1] = 0;
+
+ if (override_value("user", option_priority, fname))
+ strlcpy(user, u, sizeof(user));
+ if (override_value("passwd", option_priority, fname))
+ strlcpy(passwd, p, sizeof(passwd));
return (1);
}
}
+/*
+ * set_noauth_addr - set address(es) that can be used without authentication.
+ * Equivalent to specifying an entry like `"" * "" addr' in pap-secrets.
+ */
+static int
+set_noauth_addr(argv)
+ char **argv;
+{
+ char *addr = *argv;
+ int l = strlen(addr) + 1;
+ struct wordlist *wp;
+
+ wp = (struct wordlist *) malloc(sizeof(struct wordlist) + l);
+ if (wp == NULL)
+ novm("allow-ip argument");
+ wp->word = (char *) (wp + 1);
+ wp->next = noauth_addrs;
+ BCOPY(addr, wp->word, l);
+ noauth_addrs = wp;
+ return 1;
+}
+
+
+/*
+ * 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.
{
if (phase == PHASE_DEAD)
return;
- if (logged_in)
- plogout();
- phase = PHASE_DEAD;
+ if (pap_logout_hook) {
+ pap_logout_hook();
+ } else {
+ if (logged_in)
+ plogout();
+ }
+ new_phase(PHASE_DEAD);
notice("Connection terminated.");
}
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);
}
num_np_open = 0;
num_np_up = 0;
if (phase != PHASE_DEAD)
- phase = PHASE_TERMINATE;
+ new_phase(PHASE_ESTABLISH);
}
/*
&& protp->lowerup != NULL)
(*protp->lowerup)(unit);
- if (auth_required && !(go->neg_chap || go->neg_upap)) {
+ 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:
- * treat it as though it authenticated with PAP using a username
- * of "" and a password of "". If that's not OK, boot it out.
+ * if we have some address(es) it can use without auth, fine,
+ * otherwise treat it as though it authenticated with PAP using
+ * a username of "" and a password of "". If that's not OK,
+ * boot it out.
*/
- if (!wo->neg_upap || !null_login(unit)) {
+ if (noauth_addrs != NULL) {
+ 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;
}
}
- phase = PHASE_AUTHENTICATE;
+ new_phase(PHASE_AUTHENTICATE);
+ used_login = 0;
auth = 0;
- if (go->neg_chap) {
- ChapAuthPeer(unit, our_name, 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, 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) {
auth |= PAP_WITHPEER;
}
auth_pending[unit] = auth;
+ auth_done[unit] = 0;
if (!auth)
network_phase(unit);
{
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) {
auth_script_state = s_up;
* If we negotiated callback, do it now.
*/
if (go->neg_cbcp) {
- phase = PHASE_CALLBACK;
+ new_phase(PHASE_CALLBACK);
(*cbcp_protent.open)(unit);
return;
}
free_wordlist(extra_options);
extra_options = 0;
}
- start_networks();
+ start_networks(unit);
}
void
-start_networks()
+start_networks(unit)
+ int unit;
{
int i;
struct protent *protp;
+ int ecp_required, mppe_required;
+
+ new_phase(PHASE_NETWORK);
+
+#ifdef HAVE_MULTILINK
+ if (multilink) {
+ if (mp_join_bundle()) {
+ if (updetach && !nodetach)
+ detach();
+ return;
+ }
+ }
+#endif /* HAVE_MULTILINK */
- phase = PHASE_NETWORK;
-#if 0
+#ifdef PPP_FILTER
if (!demand)
set_filters(&pass_filter, &active_filter);
#endif
+ /* Start CCP and ECP */
+ for (i = 0; (protp = protocols[i]) != NULL; ++i)
+ if ((protp->protocol == PPP_ECP || protp->protocol == PPP_CCP)
+ && protp->enabled_flag && protp->open != NULL)
+ (*protp->open)(0);
+
+ /*
+ * Bring up other network protocols iff encryption is not required.
+ */
+ ecp_required = ecp_gotoptions[unit].required;
+ mppe_required = ccp_gotoptions[unit].mppe;
+ if (!ecp_required && !mppe_required)
+ continue_networks(unit);
+}
+
+void
+continue_networks(unit)
+ int unit;
+{
+ int i;
+ struct protent *protp;
+
+ /*
+ * Start the "real" network protocols.
+ */
for (i = 0; (protp = protocols[i]) != NULL; ++i)
- if (protp->protocol < 0xC000 && protp->enabled_flag
- && protp->open != NULL) {
+ if (protp->protocol < 0xC000
+ && protp->protocol != PPP_CCP && protp->protocol != PPP_ECP
+ && protp->enabled_flag && protp->open != NULL) {
(*protp->open)(0);
- if (protp->protocol != PPP_CCP)
- ++num_np_open;
+ ++num_np_open;
}
if (num_np_open == 0)
* The peer has been successfully authenticated using `protocol'.
*/
void
-auth_peer_success(unit, protocol, name, namelen)
- int unit, protocol;
+auth_peer_success(unit, protocol, prot_flavor, name, namelen)
+ int unit, protocol, prot_flavor;
char *name;
int namelen;
{
switch (protocol) {
case PPP_CHAP:
bit = CHAP_PEER;
+ switch (prot_flavor) {
+ case CHAP_MD5:
+ bit |= CHAP_MD5_PEER;
+ break;
+#ifdef CHAPMS
+ case CHAP_MICROSOFT:
+ bit |= CHAP_MS_PEER;
+ break;
+ case CHAP_MICROSOFT_V2:
+ bit |= CHAP_MS2_PEER;
+ break;
+#endif
+ }
break;
case PPP_PAP:
bit = PAP_PEER;
break;
+ case PPP_EAP:
+ bit = EAP_PEER;
+ break;
default:
warn("auth_peer_success: unknown protocol %x", protocol);
return;
namelen = sizeof(peer_authname) - 1;
BCOPY(name, peer_authname, namelen);
peer_authname[namelen] = 0;
- script_setenv("PEERNAME", peer_authname);
+ script_setenv("PEERNAME", peer_authname, 0);
+
+ /* Save the authentication method for later. */
+ auth_done[unit] |= bit;
/*
* If there is no more authentication still to be done,
* We have successfully authenticated ourselves with the peer using `protocol'.
*/
void
-auth_withpeer_success(unit, protocol)
- int unit, protocol;
+auth_withpeer_success(unit, protocol, prot_flavor)
+ int unit, protocol, prot_flavor;
{
int bit;
switch (protocol) {
case PPP_CHAP:
bit = CHAP_WITHPEER;
+ switch (prot_flavor) {
+ case CHAP_MD5:
+ bit |= CHAP_MD5_WITHPEER;
+ break;
+#ifdef CHAPMS
+ case CHAP_MICROSOFT:
+ bit |= CHAP_MS_WITHPEER;
+ break;
+ case CHAP_MICROSOFT_V2:
+ bit |= CHAP_MS2_WITHPEER;
+ break;
+#endif
+ }
break;
case PPP_PAP:
if (passwd_from_file)
BZERO(passwd, MAXSECRETLEN);
bit = PAP_WITHPEER;
break;
+ case PPP_EAP:
+ bit = EAP_WITHPEER;
+ break;
default:
warn("auth_withpeer_success: unknown protocol %x", protocol);
bit = 0;
}
+ /* Save the authentication method for later. */
+ auth_done[unit] |= bit;
+
/*
* If there is no more authentication still being done,
* proceed to the network (or callback) phase.
np_up(unit, proto)
int unit, proto;
{
+ int tlim;
+
if (num_np_up == 0) {
/*
* At this point we consider that the link has come up successfully.
*/
status = EXIT_OK;
unsuccess = 0;
+ new_phase(PHASE_RUNNING);
- if (idle_time_limit > 0)
- TIMEOUT(check_idle, NULL, idle_time_limit);
+ if (idle_time_hook != 0)
+ tlim = (*idle_time_hook)(NULL);
+ else
+ tlim = idle_time_limit;
+ if (tlim > 0)
+ TIMEOUT(check_idle, NULL, tlim);
/*
* Set a timeout to close the connection once the maximum
if (maxconnect > 0)
TIMEOUT(connect_time_expired, 0, maxconnect);
+#ifdef MAXOCTETS
+ if (maxoctets > 0)
+ TIMEOUT(check_maxoctets, NULL, maxoctets_timeout);
+#endif
+
/*
* Detach now, if the updetach option was given.
*/
np_down(unit, proto)
int unit, proto;
{
- if (--num_np_up == 0 && idle_time_limit > 0) {
+ if (--num_np_up == 0) {
UNTIMEOUT(check_idle, NULL);
+ UNTIMEOUT(connect_time_expired, NULL);
+#ifdef MAXOCTETS
+ UNTIMEOUT(check_maxoctets, NULL);
+#endif
+ new_phase(PHASE_NETWORK);
}
}
}
}
+#ifdef MAXOCTETS
+static void
+check_maxoctets(arg)
+ void *arg;
+{
+ int diff;
+ unsigned int used;
+
+ update_link_stats(ifunit);
+ link_stats_valid=0;
+
+ switch(maxoctets_dir) {
+ case PPP_OCTETS_DIRECTION_IN:
+ used = link_stats.bytes_in;
+ break;
+ case PPP_OCTETS_DIRECTION_OUT:
+ used = link_stats.bytes_out;
+ break;
+ case PPP_OCTETS_DIRECTION_MAXOVERAL:
+ case PPP_OCTETS_DIRECTION_MAXSESSION:
+ used = (link_stats.bytes_in > link_stats.bytes_out) ? link_stats.bytes_in : link_stats.bytes_out;
+ break;
+ default:
+ used = link_stats.bytes_in+link_stats.bytes_out;
+ break;
+ }
+ diff = maxoctets - used;
+ if(diff < 0) {
+ notice("Traffic limit reached. Limit: %u Used: %u", maxoctets, used);
+ lcp_close(0, "Traffic limit");
+ need_holdoff = 0;
+ status = EXIT_TRAFFIC_LIMIT;
+ } else {
+ TIMEOUT(check_maxoctets, NULL, maxoctets_timeout);
+ }
+}
+#endif
+
/*
* check_idle - check whether the link has been idle for long
* enough that we can shut it down.
*/
static void
check_idle(arg)
- void *arg;
+ void *arg;
{
struct ppp_idle idle;
time_t itime;
+ int tlim;
if (!get_idle_time(0, &idle))
return;
- itime = MIN(idle.xmit_idle, idle.recv_idle);
- if (itime >= idle_time_limit) {
+ if (idle_time_hook != 0) {
+ tlim = idle_time_hook(&idle);
+ } else {
+ itime = MIN(idle.xmit_idle, idle.recv_idle);
+ tlim = idle_time_limit - itime;
+ }
+ if (tlim <= 0) {
/* link is idle: shut it down. */
notice("Terminating connection due to lack of activity.");
lcp_close(0, "Link inactive");
need_holdoff = 0;
status = EXIT_IDLE_TIMEOUT;
} else {
- TIMEOUT(check_idle, NULL, idle_time_limit - itime);
+ TIMEOUT(check_idle, NULL, tlim);
}
}
/*
* If we have a default route, require the peer to authenticate
- * unless the noauth option was given.
+ * unless the noauth option was given or the real user is root.
*/
- if (!auth_required && !allow_any_ip && have_route_to(0))
+ if (!auth_required && !allow_any_ip && have_route_to(0) && !privileged) {
auth_required = 1;
+ default_auth = 1;
+ }
+
+ /* 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 or PAP. */
+ /* If authentication is required, ask peer for CHAP, PAP, or EAP. */
if (auth_required) {
- if (!wo->neg_chap && !wo->neg_upap) {
- wo->neg_chap = 1;
+ allow_any_ip = 0;
+ if (!wo->neg_chap && !wo->neg_upap && !wo->neg_eap) {
+ wo->neg_chap = 1; wo->chap_mdtype = MDTYPE_ALL;
wo->neg_upap = 1;
+ wo->neg_eap = 1;
}
} else {
- wo->neg_chap = 0;
+ 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) {
- if (explicit_remote)
+ if (auth_required && !can_auth && noauth_addrs == NULL) {
+ if (default_auth) {
option_error(
-"The remote system (%s) is required to authenticate itself but I",
- remote_name);
- else
+"By default the remote system is required to authenticate itself");
option_error(
-"The remote system is required to authenticate itself but I");
-
- if (!lacks_ip)
+"(because this system has a default route to the internet)");
+ } else if (explicit_remote)
option_error(
-"couldn't find any suitable secret (password) for it to use to do so.");
+"The remote system (%s) is required to authenticate itself",
+ remote_name);
else
option_error(
-"couldn't find any secret (password) which would let it use an IP address.");
+"The remote system is required to authenticate itself");
+ option_error(
+"but I couldn't find any suitable secret (password) for it to use to do so.");
+ if (lacks_ip)
+ option_error(
+"(None of the available passwords would let it use an IP address.)");
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
- && (passwd[0] != 0
- || have_chap_secret(user, (explicit_remote? remote_name: NULL),
- 0, NULL));
-
+ ao->neg_chap = (!refuse_chap || !refuse_mschap || !refuse_mschap_v2)
+ && (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;
}
* In either case, msg points to an appropriate message.
*/
int
-check_passwd(unit, auser, userlen, apasswd, passwdlen, msg, msglen)
+check_passwd(unit, auser, userlen, apasswd, passwdlen, msg)
int unit;
char *auser;
int userlen;
char *apasswd;
int passwdlen;
char **msg;
- int *msglen;
{
int ret;
char *filename;
FILE *f;
- struct wordlist *addrs;
+ struct wordlist *addrs = NULL, *opts = NULL;
char passwd[256], user[256];
char secret[MAXWORDLEN];
static int attempts = 0;
/*
* Make copies of apasswd and auser, then null-terminate them.
+ * If there are unprintable characters in the password, make
+ * them visible.
*/
- BCOPY(apasswd, passwd, passwdlen);
- passwd[passwdlen] = '\0';
- BCOPY(auser, user, userlen);
- user[userlen] = '\0';
- *msg = (char *) 0;
+ slprintf(passwd, sizeof(passwd), "%.*v", passwdlen, apasswd);
+ slprintf(user, sizeof(user), "%.*v", userlen, auser);
+ *msg = "";
+
+ /*
+ * Check if a plugin wants to handle this.
+ */
+ 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);
+ else if (opts != 0)
+ free_wordlist(opts);
+ if (addrs != 0)
+ free_wordlist(addrs);
+ BZERO(passwd, sizeof(passwd));
+ return ret? UPAP_AUTHACK: UPAP_AUTHNAK;
+ }
+ }
/*
* Open the file of pap secrets and scan for a suitable secret
* for authenticating this user.
*/
filename = _PATH_UPAPFILE;
- addrs = NULL;
+ addrs = opts = NULL;
ret = UPAP_AUTHNAK;
f = fopen(filename, "r");
if (f == NULL) {
} else {
check_access(f, filename);
- if (scan_authfile(f, user, our_name, secret, &addrs, filename) < 0) {
+ if (scan_authfile(f, user, our_name, secret, &addrs, &opts, filename, 0) < 0) {
warn("no PAP secret found for %s", user);
- } else if (secret[0] != 0) {
- /* password given in pap-secrets - must match */
- if ((!cryptpap && strcmp(passwd, secret) == 0)
- || strcmp(crypt(passwd, secret), secret) == 0)
- ret = UPAP_AUTHACK;
- else
- warn("PAP authentication failure for %s", user);
- } else if (uselogin) {
- /* empty password in pap-secrets and login option */
- ret = plogin(user, passwd, msg, msglen);
- if (ret == UPAP_AUTHNAK)
- warn("PAP login failure for %s", user);
} else {
- /* empty password in pap-secrets and login option not used */
+ /*
+ * If the secret is "@login", it means to check
+ * the password against the login database.
+ */
+ int login_secret = strcmp(secret, "@login") == 0;
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 (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;
+ }
}
fclose(f);
}
if (ret == UPAP_AUTHNAK) {
- if (*msg == (char *) 0)
+ if (**msg == 0)
*msg = "Login incorrect";
- *msglen = strlen(*msg);
/*
* XXX can we ever get here more than once??
* Frustrate passwd stealer programs.
}
if (attempts > 3)
sleep((u_int) (attempts - 3) * 5);
- if (addrs != NULL)
- free_wordlist(addrs);
+ if (opts != NULL)
+ free_wordlist(opts);
} else {
attempts = 0; /* Reset count */
- if (*msg == (char *) 0)
+ if (**msg == 0)
*msg = "Login ok";
- *msglen = strlen(*msg);
- set_allowed_addrs(unit, addrs);
+ set_allowed_addrs(unit, addrs, opts);
}
+ if (addrs != NULL)
+ free_wordlist(addrs);
BZERO(passwd, sizeof(passwd));
BZERO(secret, sizeof(secret));
* 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 int
-plogin(user, passwd, msg, msglen)
+plogin(user, passwd, msg)
char *user;
char *passwd;
char **msg;
- int *msglen;
{
char *tty;
if (pam_error == PAM_SUCCESS && !PAM_error) {
pam_error = pam_acct_mgmt (pamh, PAM_SILENT);
if (pam_error == PAM_SUCCESS)
- pam_open_session (pamh, PAM_SILENT);
+ pam_error = pam_open_session (pamh, PAM_SILENT);
}
*msg = (char *) pam_strerror (pamh, pam_error);
tty = devnam;
if (strncmp(tty, "/dev/", 5) == 0)
tty += 5;
- logwtmp(tty, user, remote_name); /* Add wtmp login entry */
+ logwtmp(tty, user, ifname); /* Add wtmp login entry */
#if defined(_PATH_LASTLOG) && !defined(USE_PAM)
if (pw != (struct passwd *)NULL) {
char *filename;
FILE *f;
int i, ret;
- struct wordlist *addrs;
+ struct wordlist *addrs, *opts;
char secret[MAXWORDLEN];
+ /*
+ * Check if a plugin wants to handle this.
+ */
+ ret = -1;
+ if (null_auth_hook)
+ ret = (*null_auth_hook)(&addrs, &opts);
+
/*
* Open the file of pap secrets and scan for a suitable secret.
- * We don't accept a wildcard client.
*/
- filename = _PATH_UPAPFILE;
- addrs = NULL;
- f = fopen(filename, "r");
- if (f == NULL)
- return 0;
- check_access(f, filename);
+ if (ret <= 0) {
+ filename = _PATH_UPAPFILE;
+ addrs = NULL;
+ f = fopen(filename, "r");
+ if (f == NULL)
+ return 0;
+ check_access(f, filename);
- i = scan_authfile(f, "", our_name, secret, &addrs, filename);
- ret = i >= 0 && (i & NONWILD_CLIENT) != 0 && secret[0] == 0;
- BZERO(secret, sizeof(secret));
+ i = scan_authfile(f, "", our_name, secret, &addrs, &opts, filename, 0);
+ ret = i >= 0 && secret[0] == 0;
+ BZERO(secret, sizeof(secret));
+ fclose(f);
+ }
if (ret)
- set_allowed_addrs(unit, addrs);
- else
+ set_allowed_addrs(unit, addrs, opts);
+ else if (opts != 0)
+ free_wordlist(opts);
+ if (addrs != 0)
free_wordlist(addrs);
- fclose(f);
return ret;
}
char *filename;
FILE *f;
int ret;
- struct wordlist *addrs;
char secret[MAXWORDLEN];
+ /*
+ * Check whether a plugin wants to supply this.
+ */
+ if (pap_passwd_hook) {
+ ret = (*pap_passwd_hook)(user, passwd);
+ if (ret >= 0)
+ return ret;
+ }
+
filename = _PATH_UPAPFILE;
- addrs = NULL;
f = fopen(filename, "r");
if (f == NULL)
return 0;
check_access(f, filename);
ret = scan_authfile(f, user,
(remote_name[0]? remote_name: NULL),
- secret, NULL, filename);
+ secret, NULL, NULL, filename, 0);
fclose(f);
if (ret < 0)
return 0;
char *filename;
struct wordlist *addrs;
+ /* let the plugin decide, if there is one */
+ if (pap_check_hook) {
+ ret = (*pap_check_hook)();
+ if (ret >= 0)
+ return ret;
+ }
+
filename = _PATH_UPAPFILE;
f = fopen(filename, "r");
if (f == NULL)
return 0;
ret = scan_authfile(f, (explicit_remote? remote_name: NULL), our_name,
- NULL, &addrs, filename);
+ NULL, &addrs, NULL, filename, 0);
fclose(f);
if (ret >= 0 && !some_ip_ok(addrs)) {
if (lacks_ipp != 0)
char *filename;
struct wordlist *addrs;
+ if (chap_check_hook) {
+ ret = (*chap_check_hook)();
+ if (ret >= 0) {
+ return ret;
+ }
+ }
+
filename = _PATH_CHAPFILE;
f = fopen(filename, "r");
if (f == NULL)
else if (server != NULL && server[0] == 0)
server = NULL;
- ret = scan_authfile(f, client, server, NULL, &addrs, 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)
FILE *f;
int ret, len;
char *filename;
- struct wordlist *addrs;
+ struct wordlist *addrs, *opts;
char secbuf[MAXWORDLEN];
if (!am_server && passwd[0] != 0) {
strlcpy(secbuf, passwd, sizeof(secbuf));
+ } else if (!am_server && chap_passwd_hook) {
+ if ( (*chap_passwd_hook)(client, secbuf) < 0) {
+ error("Unable to obtain CHAP password for %s on %s from plugin",
+ client, server);
+ return 0;
+ }
} else {
filename = _PATH_CHAPFILE;
addrs = NULL;
}
check_access(f, filename);
- ret = scan_authfile(f, client, server, secbuf, &addrs, filename);
+ ret = scan_authfile(f, client, server, secbuf, &addrs, &opts, filename, 0);
fclose(f);
if (ret < 0)
return 0;
if (am_server)
- set_allowed_addrs(unit, addrs);
+ set_allowed_addrs(unit, addrs, opts);
+ else if (opts != 0)
+ free_wordlist(opts);
+ if (addrs != 0)
+ free_wordlist(addrs);
}
len = strlen(secbuf);
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
* and leaves the following words in extra_options.
*/
static void
-set_allowed_addrs(unit, addrs)
+set_allowed_addrs(unit, addrs, opts)
int unit;
struct wordlist *addrs;
+ struct wordlist *opts;
{
int n;
- struct wordlist *ap, **pap;
+ struct wordlist *ap, **plink;
struct permitted_ip *ip;
char *ptr_word, *ptr_mask;
struct hostent *hp;
addresses[unit] = NULL;
if (extra_options != NULL)
free_wordlist(extra_options);
- extra_options = NULL;
+ extra_options = opts;
/*
- * Count the number of IP addresses given, and chop off
- * any extra options for this peer.
+ * Count the number of IP addresses given.
*/
- for (n = 0, pap = &addrs; (ap = *pap) != NULL; pap = &ap->next, ++n) {
- if (strcmp(ap->word, "--") == 0) {
- /* rest are options */
- *pap = 0;
- extra_options = ap->next;
- free(ap);
- break;
- }
- }
+ n = wordlist_count(addrs) + wordlist_count(noauth_addrs);
if (n == 0)
return;
ip = (struct permitted_ip *) malloc((n + 1) * sizeof(struct permitted_ip));
if (ip == 0)
return;
+ /* temporarily append the noauth_addrs list to addrs */
+ for (plink = &addrs; *plink != NULL; plink = &(*plink)->next)
+ ;
+ *plink = noauth_addrs;
+
n = 0;
for (ap = addrs; ap != NULL; ap = ap->next) {
/* "-" means no addresses authorized, "*" means any address allowed */
} 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);
if (~mask == 0 && suggested_ip == 0)
suggested_ip = a;
}
+ *plink = NULL;
ip[n].permit = 0; /* make the last entry forbid all addresses */
ip[n].base = 0; /* to terminate the list */
* which is a single host, then use that if we find one.
*/
if (suggested_ip != 0
- && (wo->hisaddr == 0 || !auth_ip_addr(unit, wo->hisaddr)))
+ && (wo->hisaddr == 0 || !auth_ip_addr(unit, wo->hisaddr))) {
wo->hisaddr = suggested_ip;
+ /*
+ * Do we insist on this address? No, if there are other
+ * addresses authorized than the suggested one.
+ */
+ if (n > 1)
+ wo->accept_remote = 1;
+ }
}
/*
int unit;
u_int32_t addr;
{
- if (addresses[unit] == NULL) {
- if (auth_required)
- return 0; /* no addresses authorized */
- return allow_any_ip || !have_route_to(addr);
+ int ok;
+
+ /* don't allow loopback or multicast address */
+ if (bad_ip_adrs(addr))
+ return 0;
+
+ if (allowed_address_hook) {
+ ok = allowed_address_hook(addr);
+ if (ok >= 0) return ok;
}
- return ip_addr_check(addr, addresses[unit]);
+
+ if (addresses[unit] != NULL) {
+ ok = ip_addr_check(addr, addresses[unit]);
+ if (ok >= 0)
+ return ok;
+ }
+
+ if (auth_required)
+ return 0; /* no addresses authorized */
+ return allow_any_ip || privileged || !have_route_to(addr);
}
static int
u_int32_t addr;
struct permitted_ip *addrs;
{
- /* don't allow loopback or multicast address */
- if (bad_ip_adrs(addr))
- return 0;
-
for (; ; ++addrs)
if ((addr & addrs->mask) == addrs->base)
return addrs->permit;
struct wordlist *addrs;
{
for (; addrs != 0; addrs = addrs->next) {
- if (strcmp(addrs->word, "-") == 0)
+ if (addrs->word[0] == '-')
break;
if (addrs->word[0] != '!')
return 1; /* some IP address is allowed */
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.
*/
* if no secret is found, otherwise >= 0. The return value has
* NONWILD_CLIENT set if the secret didn't have "*" for the client, and
* NONWILD_SERVER set if the secret didn't have "*" for the server.
- * Any following words on the line (i.e. address authorization
- * info) are placed in a wordlist and returned in *addrs.
+ * Any following words on the line up to a "--" (i.e. address authorization
+ * info) are placed in a wordlist and returned in *addrs. Any
+ * 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, filename)
+scan_authfile(f, client, server, secret, addrs, opts, filename, flags)
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;
FILE *sf;
- struct wordlist *ap, *addr_list, *alist, *alast;
+ struct wordlist *ap, *addr_list, *alist, **app;
char word[MAXWORDLEN];
char atfile[MAXWORDLEN];
char lsecret[MAXWORDLEN];
+ char *cp;
if (addrs != NULL)
*addrs = NULL;
+ if (opts != NULL)
+ *opts = NULL;
addr_list = NULL;
if (!getword(f, word, &newline, filename))
return -1; /* file is empty??? */
continue;
/*
- * Special syntax: @filename means read secret from file.
+ * SRP-SHA1 authenticator should never be reading secrets from
+ * a file. (Authenticatee may, though.)
*/
- if (word[0] == '@') {
- strlcpy(atfile, word+1, sizeof(atfile));
- if ((sf = fopen(atfile, "r")) == NULL) {
- warn("can't open indirect secret file %s", atfile);
- continue;
- }
- check_access(sf, atfile);
- if (!getword(sf, word, &xxx, atfile)) {
- warn("no secret in indirect secret file %s", atfile);
+ if (flags && ((cp = strchr(word, ':')) == NULL ||
+ strchr(cp + 1, ':') == NULL))
+ continue;
+
+ if (secret != NULL) {
+ /*
+ * Special syntax: @/pathname means read secret from file.
+ */
+ if (word[0] == '@' && word[1] == '/') {
+ strlcpy(atfile, word+1, sizeof(atfile));
+ if ((sf = fopen(atfile, "r")) == NULL) {
+ warn("can't open indirect secret file %s", atfile);
+ continue;
+ }
+ check_access(sf, atfile);
+ if (!getword(sf, word, &xxx, atfile)) {
+ warn("no secret in indirect secret file %s", atfile);
+ fclose(sf);
+ continue;
+ }
fclose(sf);
- continue;
}
- fclose(sf);
- }
- if (secret != NULL)
strlcpy(lsecret, word, sizeof(lsecret));
+ }
/*
* Now read address authorization info and make a wordlist.
*/
- alist = alast = NULL;
+ app = &alist;
for (;;) {
if (!getword(f, word, &newline, filename) || newline)
break;
- ap = (struct wordlist *) malloc(sizeof(struct wordlist));
+ ap = (struct wordlist *)
+ malloc(sizeof(struct wordlist) + strlen(word) + 1);
if (ap == NULL)
novm("authorized addresses");
- ap->next = NULL;
- ap->word = strdup(word);
- if (ap->word == NULL)
- novm("authorized address");
- if (alist == NULL)
- alist = ap;
- else
- alast->next = ap;
- alast = ap;
+ ap->word = (char *) (ap + 1);
+ strcpy(ap->word, word);
+ *app = ap;
+ app = &ap->next;
}
+ *app = NULL;
/*
* This is the best so far; remember it.
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)
return best_flag;
}
+/*
+ * wordlist_count - return the number of items in a wordlist
+ */
+static int
+wordlist_count(wp)
+ struct wordlist *wp;
+{
+ int n;
+
+ for (n = 0; wp != NULL; wp = wp->next)
+ ++n;
+ return n;
+}
+
/*
* free_wordlist - release memory allocated for a wordlist.
*/