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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 1.5 1998/03/13 01:25:50 brian Exp $
*
* TODO:
* o Implement check against with registered IP addresses.
*/
#include <sys/param.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "command.h"
#include "mbuf.h"
#include "defs.h"
#include "timer.h"
#include "fsm.h"
#include "ipcp.h"
#include "loadalias.h"
#include "vars.h"
#include "auth.h"
#include "chat.h"
#include "systems.h"
void
LocalAuthInit()
{
if (!(mode&MODE_DAEMON))
/* We're allowed in interactive mode */
VarLocalAuth = LOCAL_AUTH;
else if (VarHaveLocalAuthKey)
VarLocalAuth = *VarLocalAuthKey == '\0' ? LOCAL_AUTH : LOCAL_NO_AUTH;
else
switch (LocalAuthValidate(SECRETFILE, VarShortHost, "")) {
case NOT_FOUND:
VarLocalAuth = LOCAL_DENY;
break;
case VALID:
VarLocalAuth = LOCAL_AUTH;
break;
case INVALID:
VarLocalAuth = LOCAL_NO_AUTH;
break;
}
}
LOCAL_AUTH_VALID
LocalAuthValidate(const char *fname, const char *system, const char *key)
{
FILE *fp;
int n;
char *vector[3];
char buff[LINE_LEN];
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;
memset(vector, '\0', sizeof vector);
n = MakeArgs(buff, vector, VECSIZE(vector));
if (n < 1)
continue;
if (strcmp(vector[0], system) == 0) {
if ((vector[1] == (char *) NULL && (key == NULL || *key == '\0')) ||
(vector[1] != (char *) NULL && strcmp(vector[1], key) == 0)) {
rc = VALID; /* Valid */
} else {
rc = INVALID; /* Invalid */
}
break;
}
}
CloseSecret(fp);
return (rc);
}
int
AuthValidate(const char *fname, const char *system, const char *key)
{
FILE *fp;
int n;
char *vector[5];
char buff[LINE_LEN];
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;
memset(vector, '\0', sizeof vector);
n = MakeArgs(buff, vector, VECSIZE(vector));
if (n < 2)
continue;
if (strcmp(vector[0], system) == 0) {
ExpandString(vector[1], passwd, sizeof passwd, 0);
if (strcmp(passwd, key) == 0) {
CloseSecret(fp);
if (n > 2 && !UseHisaddr(vector[2], 1))
return (0);
IpcpInit();
if (n > 3)
SetLabel(vector[3]);
return (1); /* Valid */
}
}
}
CloseSecret(fp);
return (0); /* Invalid */
}
char *
AuthGetSecret(const char *fname, const char *system, int len, int setaddr)
{
FILE *fp;
int n;
char *vector[5];
char buff[LINE_LEN];
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;
memset(vector, '\0', sizeof vector);
n = MakeArgs(buff, vector, VECSIZE(vector));
if (n < 2)
continue;
if (strlen(vector[0]) == len && strncmp(vector[0], system, len) == 0) {
ExpandString(vector[1], passwd, sizeof passwd, 0);
if (setaddr) {
memset(&DefHisAddress, '\0', sizeof DefHisAddress);
}
if (n > 2 && setaddr) {
if (UseHisaddr(vector[2], 1))
IpcpInit();
else
return NULL;
}
if (n > 3)
SetLabel(vector[3]);
return (passwd);
}
}
CloseSecret(fp);
return (NULL); /* Invalid */
}
static void
AuthTimeout(void *vauthp)
{
struct pppTimer *tp;
struct authinfo *authp = (struct authinfo *)vauthp;
tp = &authp->authtimer;
StopTimer(tp);
if (--authp->retry > 0) {
StartTimer(tp);
(authp->ChallengeFunc) (++authp->id);
}
}
void
StartAuthChallenge(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(struct authinfo *authp)
{
StopTimer(&authp->authtimer);
}
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