src/device.c

   1 /*
   2  * Copyright (c) 2003-2007 Andrea Luzzardi <scox@sig11.org>
   3  *
   4  * This file is part of the pam_usb project. pam_usb is free software;
   5  * you can redistribute it and/or modify it under the terms of the GNU General
   6  * Public License version 2, as published by the Free Software Foundation.
   7  *
   8  * pam_usb is distributed in the hope that it will be useful, but WITHOUT ANY
   9  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  10  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  11  * details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  15  * Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #include <unistd.h>
  19 #include <string.h>
  20 #include <dbus/dbus.h>
  21 #include <libhal-storage.h>
  22 #include "conf.h"
  23 #include "hal.h"
  24 #include "log.h"
  25 #include "pad.h"
  26 #include "device.h"
  27
  28 static int pusb_device_connected(t_pusb_options *opts, LibHalContext *ctx)
  29 {
  30         char    *udi = NULL;
  31
  32         log_debug("Searching for \"%s\" in the hardware database...\n",
  33                         opts->device.name);
  34         udi = pusb_hal_find_item(ctx,
  35                         "storage.serial", opts->device.serial,
  36                         "storage.vendor", opts->device.vendor,
  37                         "info.product", opts->device.model,
  38                         NULL);
  39         if (!udi)
  40         {
  41                 /* Backward compatibility with older versions (0.4.1) */
  42                 udi = pusb_hal_find_item(ctx,
  43                                 "usb_device.serial", opts->device.serial,
  44                                 "usb_device.vendor", opts->device.vendor,
  45                                 "info.product", opts->device.model,
  46                                 NULL);
  47                 if (!udi)
  48                 {
  49                         log_error("Device \"%s\" is not connected.\n",
  50                                         opts->device.name);
  51                         return (0);
  52                 }
  53                 log_error("Warning: The configuration file has been " \
  54                                 "generated by an older version of pamusb-conf\n");
  55         }
  56         libhal_free_string(udi);
  57         log_info("Device \"%s\" is connected (good).\n", opts->device.name);
  58         return (1);
  59 }
  60
  61 int pusb_device_check(t_pusb_options *opts,
  62                 const char *user)
  63 {
  64         DBusConnection  *dbus = NULL;
  65         LibHalContext   *ctx = NULL;
  66         int                             retval = 0;
  67
  68         log_debug("Connecting to HAL...\n");
  69         if (!(dbus = pusb_hal_dbus_connect()))
  70                 return (0);
  71
  72         if (!(ctx = pusb_hal_init(dbus)))
  73         {
  74                 pusb_hal_dbus_disconnect(dbus);
  75                 return (0);
  76         }
  77
  78         if (!pusb_device_connected(opts, ctx))
  79         {
  80                 pusb_hal_dbus_disconnect(dbus);
  81                 libhal_ctx_free(ctx);
  82                 return (0);
  83         }
  84
  85         if (opts->one_time_pad)
  86         {
  87                 log_info("Performing one time pad verification...\n");
  88                 retval = pusb_pad_check(opts, ctx, user);
  89         }
  90         else
  91         {
  92                 log_debug("One time pad is disabled, no more verifications to do.\n");
  93                 retval = 1;
  94         }
  95
  96         pusb_hal_dbus_disconnect(dbus);
  97         libhal_ctx_free(ctx);
  98         return (retval);
  99 }