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/*
* PPP Secret Key Module
*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1994, Internet Initiative Japan, Inc. All rights reserverd.
*
* 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 Internet Initiative Japan, Inc. The name of the
* IIJ 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.
*
* $Id: auth.c,v 1.6 1996/01/11 17:48:36 phk Exp $
*
* TODO:
* o Implement check against with registered IP addresses.
*/
#include "fsm.h"
#include "lcpproto.h"
#include "ipcp.h"
#include "vars.h"
#include "filter.h"
#include "auth.h"
#include "chat.h"
extern FILE *OpenSecret();
extern void CloseSecret();
LOCAL_AUTH_VALID
LocalAuthInit(void)
{
char *p;
if ( gethostname( VarShortHost, sizeof(VarShortHost))) {
return(NOT_FOUND);
}
p = strchr( VarShortHost, '.' );
if (p)
*p = '\0';
VarLocalAuth = LOCAL_NO_AUTH;
return LocalAuthValidate( SECRETFILE, VarShortHost, "" );
}
LOCAL_AUTH_VALID
LocalAuthValidate( char *fname, char *system, char *key) {
FILE *fp;
int n;
char *vector[20]; /* XXX */
char buff[200]; /* XXX */
LOCAL_AUTH_VALID rc;
rc = NOT_FOUND; /* No system entry */
fp = OpenSecret(fname);
if (fp == NULL)
return( rc );
while (fgets(buff, sizeof(buff), fp)) {
if (buff[0] == '#')
continue;
buff[strlen(buff)-1] = 0;
bzero(vector, sizeof(vector));
n = MakeArgs(buff, vector);
if (n < 1)
continue;
if (strcmp(vector[0], system) == 0) {
if ( vector[1] != (char *) NULL && strcmp(vector[1], key) == 0) {
rc = VALID; /* Valid */
} else {
rc = INVALID; /* Invalid */
}
break;
}
}
CloseSecret(fp);
return( rc );
}
int
AuthValidate(fname, system, key)
char *fname, *system, *key;
{
FILE *fp;
int n;
char *vector[20];
char buff[200];
char passwd[100];
fp = OpenSecret(fname);
if (fp == NULL)
return(0);
while (fgets(buff, sizeof(buff), fp)) {
if (buff[0] == '#')
continue;
buff[strlen(buff)-1] = 0;
bzero(vector, sizeof(vector));
n = MakeArgs(buff, vector);
if (n < 2)
continue;
if (strcmp(vector[0], system) == 0) {
ExpandString(vector[1], passwd, 0);
if (strcmp(passwd, key) == 0) {
CloseSecret(fp);
bzero(&DefHisAddress, sizeof(DefHisAddress));
n -= 2;
if (n > 0) {
ParseAddr(n--, &vector[2],
&DefHisAddress.ipaddr, &DefHisAddress.mask, &DefHisAddress.width);
}
IpcpInit();
return(1); /* Valid */
}
}
}
CloseSecret(fp);
return(0); /* Invalid */
}
char *
AuthGetSecret(fname, system, len, setaddr)
char *fname, *system;
int len, setaddr;
{
FILE *fp;
int n;
char *vector[20];
char buff[200];
static char passwd[100];
fp = OpenSecret(fname);
if (fp == NULL)
return(NULL);
while (fgets(buff, sizeof(buff), fp)) {
if (buff[0] == '#')
continue;
buff[strlen(buff)-1] = 0;
bzero(vector, sizeof(vector));
n = MakeArgs(buff, vector);
if (n < 2)
continue;
if (strlen(vector[0]) == len && strncmp(vector[0], system, len) == 0) {
ExpandString(vector[1], passwd, 0);
if (setaddr) {
bzero(&DefHisAddress, sizeof(DefHisAddress));
}
n -= 2;
if (n > 0 && setaddr) {
#ifdef DEBUG
LogPrintf(LOG_LCP_BIT, "*** n = %d, %s\n", n, vector[2]);
#endif
ParseAddr(n--, &vector[2],
&DefHisAddress.ipaddr, &DefHisAddress.mask, &DefHisAddress.width);
IpcpInit();
}
return(passwd);
}
}
CloseSecret(fp);
return(NULL); /* Invalid */
}
static void
AuthTimeout(authp)
struct authinfo *authp;
{
struct pppTimer *tp;
tp = &authp->authtimer;
StopTimer(tp);
if (--authp->retry > 0) {
StartTimer(tp);
(authp->ChallengeFunc)(++authp->id);
}
}
void
StartAuthChallenge(authp)
struct authinfo *authp;
{
struct pppTimer *tp;
tp = &authp->authtimer;
StopTimer(tp);
tp->func = AuthTimeout;
tp->load = VarRetryTimeout * SECTICKS;
tp->state = TIMER_STOPPED;
tp->arg = (void *)authp;
StartTimer(tp);
authp->retry = 3;
authp->id = 1;
(authp->ChallengeFunc)(authp->id);
}
void
StopAuthTimer(authp)
struct authinfo *authp;
{
StopTimer(&authp->authtimer);
}
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