pam_usb/src/device.c

/*
 * 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., 59 Temple
 * Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <unistd.h>
#include <string.h>
#include <dbus/dbus.h>
#include <libhal-storage.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, LibHalContext *ctx)
{
	char	*udi = NULL;

	log_debug("Searching for \"%s\" in the hardware database...\n",
			opts->device.name);
	udi = pusb_hal_find_item(ctx,
			"usb_device.serial", opts->device.serial,
			"usb_device.vendor", opts->device.vendor,
			"info.product", opts->device.model,
			NULL);
	if (!udi)
	{
		log_error("Device \"%s\" is not connected.\n",
				opts->device.name);
		return (0);
	}
	libhal_free_string(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;
	LibHalContext	*ctx = NULL;
	int				retval = 0;

	log_debug("Connecting to HAL...\n");
	if (!(dbus = pusb_hal_dbus_connect()))
		return (0);

	if (!(ctx = pusb_hal_init(dbus)))
	{
		pusb_hal_dbus_disconnect(dbus);
		return (0);
	}

	if (!pusb_device_connected(opts, ctx))
	{
		pusb_hal_dbus_disconnect(dbus);
		libhal_ctx_free(ctx);
		return (0);
	}

	if (opts->one_time_pad)
	{
		log_info("Performing one time pad verification...\n");
		retval = pusb_pad_check(opts, ctx, user);
	}
	else
	{
		log_debug("One time pad is disabled, no more verifications to do.\n");
		retval = 1;
	}

	pusb_hal_dbus_disconnect(dbus);
	libhal_ctx_free(ctx);
	return (retval);
}