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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.
*/
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <sys/time.h>
#include <pppd/pppd.h>
#include <pppd/upap.h>
#include <pppd/chap.h>
#include <pppd/eap.h>
#include <pppd/options.h>
char pppd_version[] = PPPD_VERSION;
static char save_passwd[MAXSECRETLEN];
static int pwfd_read_password(char **argv)
{
ssize_t readgood, red;
int passwdfd;
char passwd[MAXSECRETLEN];
if (!ppp_int_option(argv[0], &passwdfd))
return 0;
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);
return 1;
}
static struct option options[] = {
{ "passwordfd", o_special, pwfd_read_password,
"Receive password on this file descriptor" },
{ NULL }
};
static int pwfd_check (void)
{
return 1;
}
static int pwfd_passwd (char *user, char *passwd)
{
if (passwd != NULL)
strcpy(passwd, save_passwd);
return 1;
}
void plugin_init (void)
{
ppp_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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