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