Honour the allow-ip option even with noauth

[ppp.git] / pppd / auth.c

diff --git a/pppd/auth.c b/pppd/auth.c
index 5af2ee0f483f501a707711df1b490dd249e3c9d7..a92d9e93be1869de4a0687c1a0dfd019718414d8 100644 (file)
--- a/pppd/auth.c
+++ b/pppd/auth.c
@@ -1,38 +1,79 @@
 /*
  * auth.c - PPP authentication and phase control.
  *
 /*
  * 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.

  */
 
  */
 

-#define RCSID  "$Id: auth.c,v 1.84 2002/09/24 11:35:22 fcusack Exp $"
+#define RCSID  "$Id: auth.c,v 1.91 2003/02/16 22:25:49 paulus Exp $"

 
 #include <stdio.h>
 #include <stddef.h>
 
 #include <stdio.h>
 #include <stddef.h>


@@ -46,7 +87,7 @@
 #include <sys/socket.h>
 #include <utmp.h>
 #include <fcntl.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 <lastlog.h>
 #endif
 


@@ -74,6 +115,7 @@
 #include "ipcp.h"
 #include "upap.h"
 #include "chap.h"
 #include "ipcp.h"
 #include "upap.h"
 #include "chap.h"

+#include "eap.h"

 #ifdef CBCP_SUPPORT
 #include "cbcp.h"
 #endif
 #ifdef CBCP_SUPPORT
 #include "cbcp.h"
 #endif


@@ -106,6 +148,12 @@ static struct permitted_ip *addresses[NUM_PPP];
    without authenticating itself. */
 static struct wordlist *noauth_addrs;
 
    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;
 
 /* Extra options to apply, from the secrets file entry for the peer. */
 static struct wordlist *extra_options;
 


@@ -174,6 +222,7 @@ bool uselogin = 0;          /* Use /etc/passwd for checking PAP */
 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 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 */
 #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 */


@@ -202,10 +251,12 @@ 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  get_pap_passwd __P((char *));
 static int  have_pap_secret __P((int *));
 static int  have_chap_secret __P((char *, char *, int, int *));

+static int  have_srp_secret __P((char *client, char *server, int need_ip,
+    int *lacks_ipp));

 static int  ip_addr_check __P((u_int32_t, struct permitted_ip *));
 static int  scan_authfile __P((FILE *, char *, char *, char *,
                               struct wordlist **, struct wordlist **,
 static int  ip_addr_check __P((u_int32_t, struct permitted_ip *));
 static int  scan_authfile __P((FILE *, char *, char *, char *,
                               struct wordlist **, struct wordlist **,

-                              char *));
+                              char *, int));

 static void free_wordlist __P((struct wordlist *));
 static void auth_script __P((char *));
 static void auth_script_done __P((void *));
 static void free_wordlist __P((struct wordlist *));
 static void auth_script __P((char *));
 static void auth_script_done __P((void *));


@@ -214,6 +265,7 @@ 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  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 check_access __P((FILE *, char *));
 static int  wordlist_count __P((struct wordlist *));
 


@@ -294,6 +346,12 @@ option_t auth_options[] = {
       &lcp_allowoptions[0].chap_mdtype },
 #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 },
     { "name", o_string, our_name,
       "Set local name for authentication",
       OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXNAMELEN },


@@ -329,6 +387,14 @@ option_t auth_options[] = {
       "Set IP address(es) which can be used without authentication",
       OPT_PRIV | OPT_A2LIST },
 
       "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 }
 };
 
     { NULL }
 };
 


@@ -433,6 +499,28 @@ set_noauth_addr(argv)
 }
 
 
 }
 
 

+/*
+ * 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.
 /*
  * An Open on LCP has requested a change from Dead to Establish phase.
  * Do what's necessary to bring the physical layer up.


@@ -517,7 +605,10 @@ link_established(unit)
            && protp->lowerup != NULL)
            (*protp->lowerup)(unit);
 
            && 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,
        /*
         * We wanted the peer to authenticate itself, and it refused:
         * if we have some address(es) it can use without auth, fine,


@@ -538,14 +629,20 @@ link_established(unit)
     new_phase(PHASE_AUTHENTICATE);
     used_login = 0;
     auth = 0;
     new_phase(PHASE_AUTHENTICATE);
     used_login = 0;
     auth = 0;

-    if (go->neg_chap) {
+    if (go->neg_eap) {
+       eap_authpeer(unit, our_name);
+       auth |= EAP_PEER;
+    } else if (go->neg_chap) {

        ChapAuthPeer(unit, our_name, CHAP_DIGEST(go->chap_mdtype));
        auth |= CHAP_PEER;
     } else if (go->neg_upap) {
        upap_authpeer(unit);
        auth |= PAP_PEER;
     }
        ChapAuthPeer(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) {
+    if (ho->neg_eap) {
+       eap_authwithpeer(unit, user);
+       auth |= EAP_WITHPEER;
+    } else if (ho->neg_chap) {

        ChapAuthWithPeer(unit, user, CHAP_DIGEST(ho->chap_mdtype));
        auth |= CHAP_WITHPEER;
     } else if (ho->neg_upap) {
        ChapAuthWithPeer(unit, user, CHAP_DIGEST(ho->chap_mdtype));
        auth |= CHAP_WITHPEER;
     } else if (ho->neg_upap) {


@@ -573,10 +670,14 @@ network_phase(unit)
 {
     lcp_options *go = &lcp_gotoptions[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 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) {
        notify(auth_up_notifier, 0);
        auth_state = s_up;
        if (auth_script_state == s_down && auth_script_pid == 0) {


@@ -714,6 +815,9 @@ auth_peer_success(unit, protocol, prot_flavor, name, namelen)
     case PPP_PAP:
        bit = PAP_PEER;
        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;
     default:
        warn("auth_peer_success: unknown protocol %x", protocol);
        return;


@@ -789,6 +893,9 @@ auth_withpeer_success(unit, protocol, prot_flavor)
            BZERO(passwd, MAXSECRETLEN);
        bit = PAP_WITHPEER;
        break;
            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;
     default:
        warn("auth_withpeer_success: unknown protocol %x", protocol);
        bit = 0;


@@ -991,28 +1098,35 @@ auth_check_options()
     if (wo->chap_mdtype)
        wo->neg_chap = 1;
 
     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 (auth_required) {
        allow_any_ip = 0;

-       if (!wo->neg_chap && !wo->neg_upap) {
+       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_chap = 1; wo->chap_mdtype = MDTYPE_ALL;
            wo->neg_upap = 1;

+           wo->neg_eap = 1;

        }
     } else {
        wo->neg_chap = 0; wo->chap_mdtype = MDTYPE_NONE;
        wo->neg_upap = 0;
        }
     } else {
        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
     }
 
     /*
      * 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));
      */
     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);
     }
        can_auth = have_chap_secret((explicit_remote? remote_name: NULL),
                                    our_name, 1, &lacks_ip);
     }

+    if (!can_auth && wo->neg_eap) {
+       can_auth = have_srp_secret((explicit_remote? remote_name: NULL),
+                                   our_name, 1, &lacks_ip);
+    }

 
     if (auth_required && !can_auth && noauth_addrs == NULL) {
        if (default_auth) {
 
     if (auth_required && !can_auth && noauth_addrs == NULL) {
        if (default_auth) {


@@ -1047,21 +1161,36 @@ auth_reset(unit)
     int unit;
 {
     lcp_options *go = &lcp_gotoptions[unit];
     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)
     ao->neg_upap = !refuse_pap && (passwd[0] != 0 || get_pap_passwd(NULL));
     ao->neg_chap = (!refuse_chap || !refuse_mschap || !refuse_mschap_v2)

-       && (passwd[0] != 0
-           || have_chap_secret(user, (explicit_remote? remote_name: NULL),
-                               0, NULL));
-
+       && (passwd[0] != 0 ||
+           (hadchap = have_chap_secret(user, (explicit_remote? remote_name:
+                                              NULL), 0, NULL)));
+    ao->neg_eap = !refuse_eap && (
+       passwd[0] != 0 ||
+       (hadchap == 1 || (hadchap == -1 && have_chap_secret(user,
+           (explicit_remote? remote_name: NULL), 0, NULL))) ||
+       have_srp_secret(user, (explicit_remote? remote_name: NULL), 0, NULL));
+
+    hadchap = -1;

     if (go->neg_upap && !uselogin && !have_pap_secret(NULL))
        go->neg_upap = 0;
     if (go->neg_chap) {
     if (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;
     }
            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;

 }
 
 
 }
 
 


@@ -1132,7 +1261,7 @@ check_passwd(unit, auser, userlen, apasswd, passwdlen, msg)
 
     } else {
        check_access(f, filename);
 
     } 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 {
            /*
            warn("no PAP secret found for %s", user);
        } else {
            /*


@@ -1143,19 +1272,14 @@ check_passwd(unit, auser, userlen, apasswd, passwdlen, msg)
            ret = UPAP_AUTHACK;
            if (uselogin || login_secret) {
                /* login option or secret is @login */
            ret = UPAP_AUTHACK;
            if (uselogin || login_secret) {
                /* login option or secret is @login */

-               ret = plogin(user, passwd, msg);
-               if (ret == UPAP_AUTHNAK)
-                   warn("PAP login failure for %s", user);
-               else
+               if ((ret = plogin(user, passwd, msg)) == UPAP_AUTHACK)

                    used_login = 1;
            }
            if (secret[0] != 0 && !login_secret) {
                /* password given in pap-secrets - must match */
                if ((cryptpap || strcmp(passwd, secret) != 0)
                    used_login = 1;
            }
            if (secret[0] != 0 && !login_secret) {
                /* password given in pap-secrets - must match */
                if ((cryptpap || strcmp(passwd, secret) != 0)

-                   && strcmp(crypt(passwd, secret), secret) != 0) {
+                   && strcmp(crypt(passwd, secret), secret) != 0)

                    ret = UPAP_AUTHNAK;
                    ret = UPAP_AUTHNAK;

-                   warn("PAP authentication failure for %s", user);
-               }

            }
        }
        fclose(f);
            }
        }
        fclose(f);


@@ -1212,8 +1336,12 @@ static pam_handle_t *pamh = NULL;
  * echo off means password.
  */
 
  * 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;
 {
     int replies = 0;
     struct pam_response *reply = NULL;


@@ -1450,7 +1578,7 @@ null_login(unit)
            return 0;
        check_access(f, filename);
 
            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);
        ret = i >= 0 && secret[0] == 0;
        BZERO(secret, sizeof(secret));
        fclose(f);


@@ -1498,7 +1626,7 @@ get_pap_passwd(passwd)
     check_access(f, filename);
     ret = scan_authfile(f, user,
                        (remote_name[0]? remote_name: NULL),
     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;
     fclose(f);
     if (ret < 0)
        return 0;


@@ -1535,7 +1663,7 @@ have_pap_secret(lacks_ipp)
        return 0;
 
     ret = scan_authfile(f, (explicit_remote? remote_name: NULL), our_name,
        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)
     fclose(f);
     if (ret >= 0 && !some_ip_ok(addrs)) {
        if (lacks_ipp != 0)


@@ -1584,7 +1712,49 @@ have_chap_secret(client, server, need_ip, lacks_ipp)
     else if (server != NULL && server[0] == 0)
        server = NULL;
 
     else if (server != NULL && server[0] == 0)
        server = NULL;
 

-    ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename);
+    ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename, 0);
+    fclose(f);
+    if (ret >= 0 && need_ip && !some_ip_ok(addrs)) {
+       if (lacks_ipp != 0)
+           *lacks_ipp = 1;
+       ret = -1;
+    }
+    if (addrs != 0)
+       free_wordlist(addrs);
+
+    return ret >= 0;
+}
+
+
+/*
+ * have_srp_secret - check whether we have a SRP file with a
+ * secret that we could possibly use for authenticating `client'
+ * on `server'.  Either can be the null string, meaning we don't
+ * know the identity yet.
+ */
+static int
+have_srp_secret(client, server, need_ip, lacks_ipp)
+    char *client;
+    char *server;
+    int need_ip;
+    int *lacks_ipp;
+{
+    FILE *f;
+    int ret;
+    char *filename;
+    struct wordlist *addrs;
+
+    filename = _PATH_SRPFILE;
+    f = fopen(filename, "r");
+    if (f == NULL)
+       return 0;
+
+    if (client != NULL && client[0] == 0)
+       client = NULL;
+    else if (server != NULL && server[0] == 0)
+       server = NULL;
+
+    ret = scan_authfile(f, client, server, NULL, &addrs, NULL, filename, 0);

     fclose(f);
     if (ret >= 0 && need_ip && !some_ip_ok(addrs)) {
        if (lacks_ipp != 0)
     fclose(f);
     if (ret >= 0 && need_ip && !some_ip_ok(addrs)) {
        if (lacks_ipp != 0)


@@ -1638,7 +1808,7 @@ get_secret(unit, client, server, secret, secret_len, am_server)
        }
        check_access(f, filename);
 
        }
        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;
        fclose(f);
        if (ret < 0)
            return 0;


@@ -1663,6 +1833,56 @@ get_secret(unit, client, server, secret, secret_len, am_server)
     return 1;
 }
 
     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
 /*
  * set_allowed_addrs() - set the list of allowed addresses.
  * Also looks for `--' indicating options to apply for this peer


@@ -1892,6 +2112,34 @@ some_ip_ok(addrs)
     return 0;
 }
 
     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.
  */
 /*
  * check_access - complain if a secret file has too-liberal permissions.
  */


@@ -1922,9 +2170,11 @@ check_access(f, filename)
  * 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.
  * 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
  */
 static int

-scan_authfile(f, client, server, secret, addrs, opts, filename)
+scan_authfile(f, client, server, secret, addrs, opts, filename, flags)

     FILE *f;
     char *client;
     char *server;
     FILE *f;
     char *client;
     char *server;


@@ -1932,6 +2182,7 @@ scan_authfile(f, client, server, secret, addrs, opts, filename)
     struct wordlist **addrs;
     struct wordlist **opts;
     char *filename;
     struct wordlist **addrs;
     struct wordlist **opts;
     char *filename;

+    int flags;

 {
     int newline, xxx;
     int got_flag, best_flag;
 {
     int newline, xxx;
     int got_flag, best_flag;


@@ -1940,6 +2191,7 @@ scan_authfile(f, client, server, secret, addrs, opts, filename)
     char word[MAXWORDLEN];
     char atfile[MAXWORDLEN];
     char lsecret[MAXWORDLEN];
     char word[MAXWORDLEN];
     char atfile[MAXWORDLEN];
     char lsecret[MAXWORDLEN];

+    char *cp;

 
     if (addrs != NULL)
        *addrs = NULL;
 
     if (addrs != NULL)
        *addrs = NULL;


@@ -1998,6 +2250,14 @@ scan_authfile(f, client, server, secret, addrs, opts, filename)
        if (newline)
            continue;
 
        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.
        if (secret != NULL) {
            /*
             * Special syntax: @/pathname means read secret from file.