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/*
* Author: Arvin Schnell <arvin@suse.de>
*
* This plugin let's you pass the password to the pppd via
* a file descriptor. That's easy and secure - no fiddling
* with pap- and chap-secrets files.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "pppd.h"
char pppd_version[] = VERSION;
static int passwdfd = -1;
static char save_passwd[MAXSECRETLEN];
static option_t options[] = {
{ "passwordfd", o_int, &passwdfd,
"Receive password on this file descriptor" },
{ NULL }
};
static int pwfd_check (void)
{
return 1;
}
static int pwfd_passwd (char *user, char *passwd)
{
int readgood, red;
if (passwdfd == -1)
return -1;
if (passwd == NULL)
return 1;
if (passwdfd == -2) {
strcpy (passwd, save_passwd);
return 1;
}
readgood = 0;
do {
red = read (passwdfd, passwd + readgood, MAXSECRETLEN - 1 - readgood);
if (red == 0)
break;
if (red < 0) {
error ("Can't read secret from fd\n");
readgood = -1;
break;
}
readgood += red;
} while (readgood < MAXSECRETLEN - 1);
close (passwdfd);
if (readgood < 0)
return 0;
passwd[readgood] = 0;
strcpy (save_passwd, passwd);
passwdfd = -2;
return 1;
}
void plugin_init (void)
{
add_options (options);
pap_check_hook = pwfd_check;
pap_passwd_hook = pwfd_passwd;
chap_check_hook = pwfd_check;
chap_passwd_hook = pwfd_passwd;
#ifdef PPP_WITH_EAPTLS
eaptls_passwd_hook = pwfd_passwd;
#endif
}
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