Hardware authentication for Linux using ordinary USB Flash Drives.
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/*
* Copyright (c) 2003-2007 Andrea Luzzardi <scox@sig11.org>
*
* This file is part of the pam_usb project. pam_usb is free software;
* you can redistribute it and/or modify it under the terms of the GNU General
* Public License version 2, as published by the Free Software Foundation.
*
* pam_usb is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
* Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <dbus/dbus.h>
#include "mem.h"
#include "conf.h"
#include "hal.h"
#include "log.h"
#include "pad.h"
#include "device.h"
static int pusb_device_connected(t_pusb_options *opts, DBusConnection *dbus)
{
char *udi = NULL;
log_debug("Searching for \"%s\" in the hardware database...\n",
opts->device.name);
udi = pusb_hal_find_item(dbus,
"DriveSerial", opts->device.serial,
"DriveVendor", opts->device.vendor,
"DriveModel", opts->device.model,
NULL);
if (!udi)
{
log_error("Device \"%s\" is not connected.\n",
opts->device.name);
return (0);
}
xfree(udi);
log_info("Device \"%s\" is connected (good).\n", opts->device.name);
return (1);
}
int pusb_device_check(t_pusb_options *opts,
const char *user)
{
DBusConnection *dbus = NULL;
int retval = 0;
log_debug("Connecting to HAL...\n");
if (!(dbus = pusb_hal_dbus_connect()))
return (0);
if (!pusb_device_connected(opts, dbus))
{
pusb_hal_dbus_disconnect(dbus);
return (0);
}
if (opts->one_time_pad)
{
log_info("Performing one time pad verification...\n");
retval = pusb_pad_check(opts, dbus, user);
}
else
{
log_debug("One time pad is disabled, no more verifications to do.\n");
retval = 1;
}
pusb_hal_dbus_disconnect(dbus);
return (retval);
}