html/cgi-bin/entropy.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2005-2010  IPFire Team                                        #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 use strict;
  23
  24 # enable only the following on debugging purpose
  25 #use warnings;
  26 #use CGI::Carp 'fatalsToBrowser';
  27
  28 require '/var/ipfire/general-functions.pl';
  29 require "${General::swroot}/lang.pl";
  30 require "${General::swroot}/header.pl";
  31 require "${General::swroot}/graphs.pl";
  32
  33 my @querry = split(/\?/,$ENV{'QUERY_STRING'});
  34 $querry[0] = '' unless defined $querry[0];
  35 $querry[1] = 'hour' unless defined $querry[1];
  36
  37 if ( $querry[0] ne~ "") {
  38         print "Content-type: image/png\n\n";
  39         binmode(STDOUT);
  40         &Graphs::updateentropygraph($querry[1]);
  41
  42 } else {
  43         &Header::showhttpheaders();
  44         &Header::openpage($Lang::tr{'entropy'}, 1, '');
  45         &Header::openbigbox('100%', 'left');
  46
  47         &Header::openbox('100%', 'center', $Lang::tr{'entropy'});
  48         &Graphs::makegraphbox("entropy.cgi", "day", '', 350);
  49         &Header::closebox();
  50
  51         # Check for hardware support.
  52         my $message;
  53         my $message_colour = $Header::colourred;
  54         if (&has_hwrng()) {
  55                 $message = $Lang::tr{'system has hwrng'};
  56                 $message_colour = $Header::colourgreen;
  57         } elsif (&has_rdrand()) {
  58                 $message = $Lang::tr{'system has rdrand'};
  59                 $message_colour = $Header::colourgreen;
  60         } else {
  61                 $message = $Lang::tr{'no hardware random number generator'};
  62         }
  63
  64         &Header::openbox('100%', 'center', $Lang::tr{'hardware support'});
  65         print <<EOF;
  66                 <p style="color: $message_colour; text-align: center;">$message</p>
  67 EOF
  68         &Header::closebox();
  69
  70         &Header::closebigbox();
  71         &Header::closepage();
  72 }
  73
  74 sub has_hwrng() {
  75         return (-c "/dev/hwrng");
  76 }
  77
  78 sub has_rdrand() {
  79         open(FILE, "/proc/cpuinfo") or return 0;
  80         my @cpuinfo = <FILE>;
  81         close(FILE);
  82
  83         my @result = grep(/rdrand/, @cpuinfo);
  84         if (@result) {
  85                 return 1;
  86         }
  87
  88         return 0;
  89 }