add a few defs

[ppp.git] / pppd / chap.c

diff --git a/pppd/chap.c b/pppd/chap.c
index 72870c52af404fbdd0dc409db90a976e12ee0478..b418f6f493f002a192b0d8699a3530dcd5becc02 100644 (file)
--- a/pppd/chap.c
+++ b/pppd/chap.c
@@ -1,5 +1,20 @@
 /*
 /*

- * chap.c - Crytographic Handshake Authentication Protocol.
+ * chap.c - Challenge Handshake Authentication Protocol.
+ *
+ * Copyright (c) 1993 The Australian National University.
+ * 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.

  *
  * Copyright (c) 1991 Gregory M. Christy.
  * All rights reserved.
  *
  * Copyright (c) 1991 Gregory M. Christy.
  * All rights reserved.


@@ -19,7 +34,7 @@
  */
 
 #ifndef lint
  */
 
 #ifndef lint

-static char rcsid[] = "$Id: chap.c,v 1.7 1995/04/24 05:59:12 paulus Exp $";
+static char rcsid[] = "$Id: chap.c,v 1.14 1997/04/30 05:51:08 paulus Exp $";

 #endif
 
 /*
 #endif
 
 /*


@@ -35,12 +50,45 @@ static char rcsid[] = "$Id: chap.c,v 1.7 1995/04/24 05:59:12 paulus Exp $";
 #include "pppd.h"
 #include "chap.h"
 #include "md5.h"
 #include "pppd.h"
 #include "chap.h"
 #include "md5.h"

+#ifdef CHAPMS
+#include "chap_ms.h"
+#endif
+
+/*
+ * Protocol entry points.
+ */
+static void ChapInit __P((int));
+static void ChapLowerUp __P((int));
+static void ChapLowerDown __P((int));
+static void ChapInput __P((int, u_char *, int));
+static void ChapProtocolReject __P((int));
+static int  ChapPrintPkt __P((u_char *, int,
+                             void (*) __P((void *, char *, ...)), void *));
+
+struct protent chap_protent = {
+    PPP_CHAP,
+    ChapInit,
+    ChapInput,
+    ChapProtocolReject,
+    ChapLowerUp,
+    ChapLowerDown,
+    NULL,
+    NULL,
+    ChapPrintPkt,
+    NULL,
+    1,
+    "CHAP",
+    NULL,
+    NULL,
+    NULL
+};

 
 chap_state chap[NUM_PPP];              /* CHAP state; one for each unit */
 
 
 chap_state chap[NUM_PPP];              /* CHAP state; one for each unit */
 

-static void ChapChallengeTimeout __P((caddr_t));
-static void ChapResponseTimeout __P((caddr_t));
+static void ChapChallengeTimeout __P((void *));
+static void ChapResponseTimeout __P((void *));

 static void ChapReceiveChallenge __P((chap_state *, u_char *, int, int));
 static void ChapReceiveChallenge __P((chap_state *, u_char *, int, int));

+static void ChapRechallenge __P((void *));

 static void ChapReceiveResponse __P((chap_state *, u_char *, int, int));
 static void ChapReceiveSuccess __P((chap_state *, u_char *, int, int));
 static void ChapReceiveFailure __P((chap_state *, u_char *, int, int));
 static void ChapReceiveResponse __P((chap_state *, u_char *, int, int));
 static void ChapReceiveSuccess __P((chap_state *, u_char *, int, int));
 static void ChapReceiveFailure __P((chap_state *, u_char *, int, int));


@@ -55,7 +103,7 @@ extern void srand48 __P((long));
 /*
  * ChapInit - Initialize a CHAP unit.
  */
 /*
  * ChapInit - Initialize a CHAP unit.
  */

-void
+static void

 ChapInit(unit)
     int unit;
 {
 ChapInit(unit)
     int unit;
 {


@@ -134,7 +182,7 @@ ChapAuthPeer(unit, our_name, digest)
  */
 static void
 ChapChallengeTimeout(arg)
  */
 static void
 ChapChallengeTimeout(arg)

-    caddr_t arg;
+    void *arg;

 {
     chap_state *cstate = (chap_state *) arg;
   
 {
     chap_state *cstate = (chap_state *) arg;
   


@@ -161,7 +209,7 @@ ChapChallengeTimeout(arg)
  */
 static void
 ChapResponseTimeout(arg)
  */
 static void
 ChapResponseTimeout(arg)

-    caddr_t arg;
+    void *arg;

 {
     chap_state *cstate = (chap_state *) arg;
 
 {
     chap_state *cstate = (chap_state *) arg;
 


@@ -178,7 +226,7 @@ ChapResponseTimeout(arg)
  */
 static void
 ChapRechallenge(arg)
  */
 static void
 ChapRechallenge(arg)

-    caddr_t arg;
+    void *arg;

 {
     chap_state *cstate = (chap_state *) arg;
 
 {
     chap_state *cstate = (chap_state *) arg;
 


@@ -189,9 +237,6 @@ ChapRechallenge(arg)
     ChapGenChallenge(cstate);
     ChapSendChallenge(cstate);
     cstate->serverstate = CHAPSS_RECHALLENGE;
     ChapGenChallenge(cstate);
     ChapSendChallenge(cstate);
     cstate->serverstate = CHAPSS_RECHALLENGE;

-
-    if (cstate->chal_interval != 0)
-       TIMEOUT(ChapRechallenge, (caddr_t) cstate, cstate->chal_interval);

 }
 
 
 }
 
 


@@ -200,7 +245,7 @@ ChapRechallenge(arg)
  *
  * Start up if we have pending requests.
  */
  *
  * Start up if we have pending requests.
  */

-void
+static void

 ChapLowerUp(unit)
     int unit;
 {
 ChapLowerUp(unit)
     int unit;
 {


@@ -226,7 +271,7 @@ ChapLowerUp(unit)
  *
  * Cancel all timeouts.
  */
  *
  * Cancel all timeouts.
  */

-void
+static void

 ChapLowerDown(unit)
     int unit;
 {
 ChapLowerDown(unit)
     int unit;
 {


@@ -235,12 +280,12 @@ ChapLowerDown(unit)
     /* Timeout(s) pending?  Cancel if so. */
     if (cstate->serverstate == CHAPSS_INITIAL_CHAL ||
        cstate->serverstate == CHAPSS_RECHALLENGE)
     /* Timeout(s) pending?  Cancel if so. */
     if (cstate->serverstate == CHAPSS_INITIAL_CHAL ||
        cstate->serverstate == CHAPSS_RECHALLENGE)

-       UNTIMEOUT(ChapChallengeTimeout, (caddr_t) cstate);
+       UNTIMEOUT(ChapChallengeTimeout, cstate);

     else if (cstate->serverstate == CHAPSS_OPEN
             && cstate->chal_interval != 0)
     else if (cstate->serverstate == CHAPSS_OPEN
             && cstate->chal_interval != 0)

-       UNTIMEOUT(ChapRechallenge, (caddr_t) cstate);
+       UNTIMEOUT(ChapRechallenge, cstate);

     if (cstate->clientstate == CHAPCS_RESPONSE)
     if (cstate->clientstate == CHAPCS_RESPONSE)

-       UNTIMEOUT(ChapResponseTimeout, (caddr_t) cstate);
+       UNTIMEOUT(ChapResponseTimeout, cstate);

 
     cstate->clientstate = CHAPCS_INITIAL;
     cstate->serverstate = CHAPSS_INITIAL;
 
     cstate->clientstate = CHAPCS_INITIAL;
     cstate->serverstate = CHAPSS_INITIAL;


@@ -250,7 +295,7 @@ ChapLowerDown(unit)
 /*
  * ChapProtocolReject - Peer doesn't grok CHAP.
  */
 /*
  * ChapProtocolReject - Peer doesn't grok CHAP.
  */

-void
+static void

 ChapProtocolReject(unit)
     int unit;
 {
 ChapProtocolReject(unit)
     int unit;
 {


@@ -269,7 +314,7 @@ ChapProtocolReject(unit)
 /*
  * ChapInput - Input CHAP packet.
  */
 /*
  * ChapInput - Input CHAP packet.
  */

-void
+static void

 ChapInput(unit, inpacket, packet_len)
     int unit;
     u_char *inpacket;
 ChapInput(unit, inpacket, packet_len)
     int unit;
     u_char *inpacket;


@@ -345,6 +390,7 @@ ChapReceiveChallenge(cstate, inp, id, len)
     char secret[MAXSECRETLEN];
     char rhostname[256];
     MD5_CTX mdContext;
     char secret[MAXSECRETLEN];
     char rhostname[256];
     MD5_CTX mdContext;

+    u_char hash[MD5_SIGNATURE_SIZE];

  
     CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: Rcvd id %d.", id));
     if (cstate->clientstate == CHAPCS_CLOSED ||
  
     CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: Rcvd id %d.", id));
     if (cstate->clientstate == CHAPCS_CLOSED ||


@@ -373,9 +419,17 @@ ChapReceiveChallenge(cstate, inp, id, len)
     BCOPY(inp, rhostname, len);
     rhostname[len] = '\000';
 
     BCOPY(inp, rhostname, len);
     rhostname[len] = '\000';
 

-    CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: received name field: %s",
+    CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: received name field '%s'",

               rhostname));
 
               rhostname));
 

+    /* Microsoft doesn't send their name back in the PPP packet */
+    if (remote_name[0] != 0 && (explicit_remote || rhostname[0] == 0)) {
+       strncpy(rhostname, remote_name, sizeof(rhostname));
+       rhostname[sizeof(rhostname) - 1] = 0;
+       CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: using '%s' as remote name",
+                  rhostname));
+    }
+

     /* get secret for authenticating ourselves with the specified host */
     if (!get_secret(cstate->unit, cstate->resp_name, rhostname,
                    secret, &secret_len, 0)) {
     /* get secret for authenticating ourselves with the specified host */
     if (!get_secret(cstate->unit, cstate->resp_name, rhostname,
                    secret, &secret_len, 0)) {


@@ -386,7 +440,7 @@ ChapReceiveChallenge(cstate, inp, id, len)
 
     /* cancel response send timeout if necessary */
     if (cstate->clientstate == CHAPCS_RESPONSE)
 
     /* cancel response send timeout if necessary */
     if (cstate->clientstate == CHAPCS_RESPONSE)

-       UNTIMEOUT(ChapResponseTimeout, (caddr_t) cstate);
+       UNTIMEOUT(ChapResponseTimeout, cstate);

 
     cstate->resp_id = id;
     cstate->resp_transmits = 0;
 
     cstate->resp_id = id;
     cstate->resp_transmits = 0;


@@ -394,21 +448,28 @@ ChapReceiveChallenge(cstate, inp, id, len)
     /*  generate MD based on negotiated type */
     switch (cstate->resp_type) { 
 
     /*  generate MD based on negotiated type */
     switch (cstate->resp_type) { 
 

-    case CHAP_DIGEST_MD5:              /* only MD5 is defined for now */
+    case CHAP_DIGEST_MD5:

        MD5Init(&mdContext);
        MD5Update(&mdContext, &cstate->resp_id, 1);
        MD5Update(&mdContext, secret, secret_len);
        MD5Update(&mdContext, rchallenge, rchallenge_len);
        MD5Init(&mdContext);
        MD5Update(&mdContext, &cstate->resp_id, 1);
        MD5Update(&mdContext, secret, secret_len);
        MD5Update(&mdContext, rchallenge, rchallenge_len);

-       MD5Final(&mdContext);
-       BCOPY(mdContext.digest, cstate->response, MD5_SIGNATURE_SIZE);
+       MD5Final(hash, &mdContext);
+       BCOPY(hash, cstate->response, MD5_SIGNATURE_SIZE);

        cstate->resp_length = MD5_SIGNATURE_SIZE;
        break;
 
        cstate->resp_length = MD5_SIGNATURE_SIZE;
        break;
 

+#ifdef CHAPMS
+    case CHAP_MICROSOFT:
+       ChapMS(cstate, rchallenge, rchallenge_len, secret, secret_len);
+       break;
+#endif
+

     default:
        CHAPDEBUG((LOG_INFO, "unknown digest type %d", cstate->resp_type));
        return;
     }
 
     default:
        CHAPDEBUG((LOG_INFO, "unknown digest type %d", cstate->resp_type));
        return;
     }
 

+    BZERO(secret, sizeof(secret));

     ChapSendResponse(cstate);
 }
 
     ChapSendResponse(cstate);
 }
 


@@ -427,10 +488,9 @@ ChapReceiveResponse(cstate, inp, id, len)
     int secret_len, old_state;
     int code;
     char rhostname[256];
     int secret_len, old_state;
     int code;
     char rhostname[256];

-    u_char buf[256];

     MD5_CTX mdContext;
     MD5_CTX mdContext;

-    u_char msg[256];

     char secret[MAXSECRETLEN];
     char secret[MAXSECRETLEN];

+    u_char hash[MD5_SIGNATURE_SIZE];

 
     CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: Rcvd id %d.", id));
 
 
     CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: Rcvd id %d.", id));
 


@@ -472,7 +532,7 @@ ChapReceiveResponse(cstate, inp, id, len)
        return;
     }
 
        return;
     }
 

-    UNTIMEOUT(ChapChallengeTimeout, (caddr_t) cstate);
+    UNTIMEOUT(ChapChallengeTimeout, cstate);

 
     if (len >= sizeof(rhostname))
        len = sizeof(rhostname) - 1;
 
     if (len >= sizeof(rhostname))
        len = sizeof(rhostname) - 1;


@@ -503,10 +563,10 @@ ChapReceiveResponse(cstate, inp, id, len)
            MD5Update(&mdContext, &cstate->chal_id, 1);
            MD5Update(&mdContext, secret, secret_len);
            MD5Update(&mdContext, cstate->challenge, cstate->chal_len);
            MD5Update(&mdContext, &cstate->chal_id, 1);
            MD5Update(&mdContext, secret, secret_len);
            MD5Update(&mdContext, cstate->challenge, cstate->chal_len);

-           MD5Final(&mdContext); 
+           MD5Final(hash, &mdContext); 

 
            /* compare local and remote MDs and send the appropriate status */
 
            /* compare local and remote MDs and send the appropriate status */

-           if (memcmp (mdContext.digest, remmd, MD5_SIGNATURE_SIZE) == 0)
+           if (memcmp (hash, remmd, MD5_SIGNATURE_SIZE) == 0)

                code = CHAP_SUCCESS;    /* they are the same! */
            break;
 
                code = CHAP_SUCCESS;    /* they are the same! */
            break;
 


@@ -515,16 +575,17 @@ ChapReceiveResponse(cstate, inp, id, len)
        }
     }
 
        }
     }
 

+    BZERO(secret, sizeof(secret));

     ChapSendStatus(cstate, code);
 
     if (code == CHAP_SUCCESS) {
        old_state = cstate->serverstate;
        cstate->serverstate = CHAPSS_OPEN;
        if (old_state == CHAPSS_INITIAL_CHAL) {
     ChapSendStatus(cstate, code);
 
     if (code == CHAP_SUCCESS) {
        old_state = cstate->serverstate;
        cstate->serverstate = CHAPSS_OPEN;
        if (old_state == CHAPSS_INITIAL_CHAL) {

-           auth_peer_success(cstate->unit, PPP_CHAP);
+           auth_peer_success(cstate->unit, PPP_CHAP, rhostname, len);

        }
        if (cstate->chal_interval != 0)
        }
        if (cstate->chal_interval != 0)

-           TIMEOUT(ChapRechallenge, (caddr_t) cstate, cstate->chal_interval);
+           TIMEOUT(ChapRechallenge, cstate, cstate->chal_interval);

 
     } else {
        syslog(LOG_ERR, "CHAP peer authentication failed");
 
     } else {
        syslog(LOG_ERR, "CHAP peer authentication failed");


@@ -557,7 +618,7 @@ ChapReceiveSuccess(cstate, inp, id, len)
        return;
     }
 
        return;
     }
 

-    UNTIMEOUT(ChapResponseTimeout, (caddr_t) cstate);
+    UNTIMEOUT(ChapResponseTimeout, cstate);

 
     /*
      * Print message.
 
     /*
      * Print message.


@@ -581,9 +642,6 @@ ChapReceiveFailure(cstate, inp, id, len)
     u_char id;
     int len;
 {
     u_char id;
     int len;
 {

-    u_char msglen;
-    u_char *msg;
-  

     CHAPDEBUG((LOG_INFO, "ChapReceiveFailure: Rcvd id %d.", id));
 
     if (cstate->clientstate != CHAPCS_RESPONSE) {
     CHAPDEBUG((LOG_INFO, "ChapReceiveFailure: Rcvd id %d.", id));
 
     if (cstate->clientstate != CHAPCS_RESPONSE) {


@@ -593,7 +651,7 @@ ChapReceiveFailure(cstate, inp, id, len)
        return;
     }
 
        return;
     }
 

-    UNTIMEOUT(ChapResponseTimeout, (caddr_t) cstate);
+    UNTIMEOUT(ChapResponseTimeout, cstate);

 
     /*
      * Print message.
 
     /*
      * Print message.


@@ -638,7 +696,7 @@ ChapSendChallenge(cstate)
   
     CHAPDEBUG((LOG_INFO, "ChapSendChallenge: Sent id %d.", cstate->chal_id));
 
   
     CHAPDEBUG((LOG_INFO, "ChapSendChallenge: Sent id %d.", cstate->chal_id));
 

-    TIMEOUT(ChapChallengeTimeout, (caddr_t) cstate, cstate->timeouttime);
+    TIMEOUT(ChapChallengeTimeout, cstate, cstate->timeouttime);

     ++cstate->chal_transmits;
 }
 
     ++cstate->chal_transmits;
 }
 


@@ -738,18 +796,18 @@ ChapSendResponse(cstate)
     output(cstate->unit, outpacket_buf, outlen + PPP_HDRLEN);
 
     cstate->clientstate = CHAPCS_RESPONSE;
     output(cstate->unit, outpacket_buf, outlen + PPP_HDRLEN);
 
     cstate->clientstate = CHAPCS_RESPONSE;

-    TIMEOUT(ChapResponseTimeout, (caddr_t) cstate, cstate->timeouttime);
+    TIMEOUT(ChapResponseTimeout, cstate, cstate->timeouttime);

     ++cstate->resp_transmits;
 }
 
 /*
  * ChapPrintPkt - print the contents of a CHAP packet.
  */
     ++cstate->resp_transmits;
 }
 
 /*
  * ChapPrintPkt - print the contents of a CHAP packet.
  */

-char *ChapCodenames[] = {
+static char *ChapCodenames[] = {

     "Challenge", "Response", "Success", "Failure"
 };
 
     "Challenge", "Response", "Success", "Failure"
 };
 

-int
+static int

 ChapPrintPkt(p, plen, printer, arg)
     u_char *p;
     int plen;
 ChapPrintPkt(p, plen, printer, arg)
     u_char *p;
     int plen;