/* Authentication (Client side) */
int auth_client(int fd, struct vtun_host *host, int * reason)
{
char buf[VTUN_MESG_SIZE], chal[VTUN_CHAL_SIZE];
int stage, success=0 ;
stage = ST_INIT;
*reason = D_NOREAD;
while( readn_t(fd, buf, VTUN_MESG_SIZE, vtun.timeout) > 0 ){
*reason = D_OTHER;
buf[sizeof(buf)-1]='\0';
switch( stage ){
case ST_INIT:
if (!strncmp(buf, "VTRUNKD", 7)) {
stage = ST_HOST;
print_p(fd,"HOST: %s\n",host->host);
continue;
}
*reason = D_GREET;
break;
case ST_HOST:
if( !strncmp(buf,"OK",2) && cs2cl(buf,chal)){
stage = ST_CHAL;
encrypt_chal(chal,host->passwd);
print_p(fd,"CHAL: %s\n", cl2cs(chal));
continue;
}
*reason = D_CHAL;
break;
case ST_CHAL:
if( !strncmp(buf,"OK",2) && cf2bf(buf,host) )
success = 1;
else *reason = D_PWD;
break;
}
break;
}
return success;
}
void inline decrypt_chal(char *chal, char *pwd)
{
encrypt_chal(chal, pwd);
}
void decrypt_chal(char *chal, char *pwd)
{
encrypt_chal(chal, pwd);
}
