src/util/ocsp_fetch.pl

   1 #!/usr/bin/perl
   2 # Copyright (C) 2012 Wizards Internet Ltd
   3 # License GPLv2: GNU GPL version 2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
   4 use strict;
   5 use Getopt::Std;
   6 $Getopt::Std::STANDARD_HELP_VERSION=1;
   7 use IO::Handle;
   8 use Date::Parse;
   9 my ($o,$i,$s,$f,$t,$u,$VERSION);
  10 $VERSION='1.0';
  11 $o={'m'=>10};
  12 getopts("c:i:u:a:o:m:fv",$o);
  13 usage('No issuer specified') if ! $o->{'i'} && ! -f $o->{'i'};
  14 usage('No certificate specified') if ! $o->{'c'} && ! -f $o->{'c'};
  15 usage('No CA chain specified') if ! $o->{'a'} && ! -f $o->{'a'};
  16 usage('No OCSP file specified') if ! $o->{'o'};
  17 usage('No URL specified') if ! $o->{'u'};
  18 $o->{'t'}=$o->{'o'}.'.tmp';
  19
  20 # check if we need to
  21 if (     $o->{'f'}
  22     || ! -f $o->{'o'}
  23     || ( -M $o->{'o'} > 0 )
  24    )
  25 {
  26     $i = new IO::Handle;
  27     open( $i, "openssl ocsp -issuer $o->{'i'} -cert $o->{'c'} -url $o->{'u'} -CAfile $o->{'a'} -respout $o->{'t'} 2>/dev/null |" ) || die 'Unable to execute ocsp command';
  28     $s = <$i> || die 'Unable to read status';
  29     $f = <$i> || die 'Unable to read update time';
  30     $t = <$i> || die 'Unable to read next update time';
  31     close $i;
  32     # Status ok ?
  33     chomp($s);
  34     chomp($f);
  35     chomp($t);
  36     $s =~ s/[^:]*: //;
  37     $f =~ s/[^:]*: //;
  38     $t =~ s/[^:]*: //;
  39     $t = str2time($t);
  40     die "OCSP status is $s" if $s ne 'good';
  41     warn "Next Update $t" if $o->{'v'};
  42     # response is good, adjust mod time and move into place.
  43     $u = $t - $o->{'m'} * (($t - time)/100);
  44     utime $u,$u,$o->{'t'};
  45     rename $o->{'t'},$o->{'o'};
  46 }
  47 exit;
  48
  49 sub
  50 usage
  51 {
  52     my $m = shift;
  53     print STDERR "$m\n" if $m;
  54     HELP_MESSAGE(\*STDERR);
  55     die;
  56 }
  57 sub
  58 HELP_MESSAGE
  59 {
  60     my $h = shift;
  61     print $h <<EOF
  62 Usage: $0 -i issuer -c certificate -u ocsp_url -a ca_certs -o response [-v] [-f]
  63
  64 For a certificate    "www.example.com.pem"
  65   signed by          "signing.example.net.pem"
  66   signed by root CA  "ca.example.net.pem"
  67   with OCSP server   http://ocsp.example.net/
  68
  69 Ensure there is a file with the signing chain
  70
  71   cat ca.example.net.pem signing.example.net.pem >chain.pem
  72
  73 The update procedure would be
  74
  75     ocsp_fetch -i signing.example.net.pem \
  76         -c www.example.com.pem \
  77     -u http://ocsp.example.net/ \
  78     -a chain.pem \
  79     -o www.example.com.ocsp.der
  80 EOF
  81 }
  82 # vi: aw ai sw=4
  83 # End of File