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/*
* PPP PAP Module
*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993-94, 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: pap.c,v 1.6 1996/10/06 13:32:30 jkh Exp $
*
* TODO:
*/
#include "fsm.h"
#include "lcp.h"
#include "pap.h"
#include "vars.h"
#include "hdlc.h"
#include "lcpproto.h"
#include "phase.h"
#include "auth.h"
#ifdef PASSWDAUTH
# include "passwdauth.h"
#endif
static char *papcodes[] = {
"???", "REQUEST", "ACK", "NAK"
};
struct authinfo AuthPapInfo = {
SendPapChallenge,
};
void
SendPapChallenge(papid)
int papid;
{
struct fsmheader lh;
struct mbuf *bp;
u_char *cp;
int namelen, keylen, plen;
namelen = strlen(VarAuthName);
keylen = strlen(VarAuthKey);
plen = namelen + keylen + 2;
#ifdef DEBUG
logprintf("namelen = %d, keylen = %d\n", namelen, keylen);
#endif
LogPrintf(LOG_PHASE_BIT, "PAP: %s (%s)\n", VarAuthName, VarAuthKey);
lh.code = PAP_REQUEST;
lh.id = papid;
lh.length = htons(plen + sizeof(struct fsmheader));
bp = mballoc(plen + sizeof(struct fsmheader), MB_FSM);
bcopy(&lh, MBUF_CTOP(bp), sizeof(struct fsmheader));
cp = MBUF_CTOP(bp) + sizeof(struct fsmheader);
*cp++ = namelen;
bcopy(VarAuthName, cp, namelen);
cp += namelen;
*cp++ = keylen;
bcopy(VarAuthKey, cp, keylen);
HdlcOutput(PRI_LINK, PROTO_PAP, bp);
}
static void
SendPapCode(id, code, message)
int id;
char *message;
int code;
{
struct fsmheader lh;
struct mbuf *bp;
u_char *cp;
int plen, mlen;
lh.code = code;
lh.id = id;
mlen = strlen(message);
plen = mlen + 1;
lh.length = htons(plen + sizeof(struct fsmheader));
bp = mballoc(plen + sizeof(struct fsmheader), MB_FSM);
bcopy(&lh, MBUF_CTOP(bp), sizeof(struct fsmheader));
cp = MBUF_CTOP(bp) + sizeof(struct fsmheader);
*cp++ = mlen;
bcopy(message, cp, mlen);
LogPrintf(LOG_PHASE_BIT, "PapOutput: %s\n", papcodes[code]);
HdlcOutput(PRI_LINK, PROTO_PAP, bp);
}
/*
* Validate given username and passwrd against with secret table
*/
static int
PapValidate(name, key)
u_char *name, *key;
{
int nlen, klen;
nlen = *name++;
klen = *key;
*key++ = 0;
key[klen] = 0;
#ifdef DEBUG
logprintf("name: %s (%d), key: %s (%d)\n", name, nlen, key, klen);
#endif
#ifdef PASSWDAUTH
if( Enabled( ConfPasswdAuth ) )
{
LogPrintf( LOG_LCP, "PasswdAuth enabled - calling\n" );
return PasswdAuth( name, key );
}
#endif /* PASSWDAUTH */
return(AuthValidate(SECRETFILE, name, key));
}
void
PapInput(bp)
struct mbuf *bp;
{
int len = plength(bp);
struct fsmheader *php;
struct lcpstate *lcp = &LcpInfo;
u_char *cp;
if (len >= sizeof(struct fsmheader)) {
php = (struct fsmheader *)MBUF_CTOP(bp);
if (len >= ntohs(php->length)) {
if (php->code < PAP_REQUEST || php->code > PAP_NAK)
php->code = 0;
LogPrintf(LOG_PHASE_BIT, "PapInput: %s\n", papcodes[php->code]);
switch (php->code) {
case PAP_REQUEST:
cp = (u_char *) (php + 1);
if (PapValidate(cp, cp + *cp + 1)) {
SendPapCode(php->id, PAP_ACK, "Greetings!!");
lcp->auth_ineed = 0;
if (lcp->auth_iwait == 0)
NewPhase(PHASE_NETWORK);
} else {
SendPapCode(php->id, PAP_NAK, "Login incorrect");
LcpClose();
}
break;
case PAP_ACK:
StopAuthTimer(&AuthPapInfo);
cp = (u_char *)(php + 1);
len = *cp++;
cp[len] = 0;
LogPrintf(LOG_PHASE_BIT, "Received PAP_ACK (%s)\n", cp);
if (lcp->auth_iwait == PROTO_PAP) {
lcp->auth_iwait = 0;
if (lcp->auth_ineed == 0)
NewPhase(PHASE_NETWORK);
}
break;
case PAP_NAK:
StopAuthTimer(&AuthPapInfo);
cp = (u_char *)(php + 1);
len = *cp++;
cp[len] = 0;
LogPrintf(LOG_PHASE_BIT, "Received PAP_NAK (%s)\n", cp);
LcpClose();
break;
}
}
}
pfree(bp);
}
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