#!/usr/bin/perl --

use strict;
use warnings;

use File::Spec;
use Crypt::RSA;

Main(@ARGV);
exit(0);

sub Main {
  my $thisf    = File::Spec->rel2abs(__FILE__);
  my $fprivate = "$thisf-testkey.private";
  my $fpublic  = "$thisf-testkey.public";

  print "RSA tester ($thisf)\n";

  my $infoToSign = "blah";
  my $privateKey = 5;

  my $rsa = new Crypt::RSA;

  my ( $public, $private );

  if ( -e $fpublic and -e $fprivate ) {
    print "reading $fprivate\n";
    $private = new Crypt::RSA::Key::Private(
      Filename => $fprivate,
      @_ ? ( Password => 'password' ) : (),    # NOTICE ARGV
    );
  } else {
    print "generating keys\n";
    ( $public, $private ) = $rsa->keygen(
      Identity => 'RBSClient',
      Size     => 1024,
      Password => 'password',
    ) or die $rsa->errstr();

    $private->write( Filename => $fprivate );
    $public->write( Filename => $fpublic );
  }

  print "signing $infoToSign\n";
  my $signature = $rsa->sign(
    Message => $infoToSign,
    Key     => $private,
    Armour  => 1,
  ) || die $rsa->errstr();

  print "$signature \n";
}

__END__

$ perl crypt-rsa-sign-test.pl
RSA tester (~/tmp/crypt-rsa-sign-test.pl)
generating keys
signing blah
PARI:   ***   negative exponent in glog. at ~/lib/Crypt/RSA/DataFormat.pm line 77.

$
$ perl crypt-rsa-sign-test.pl
RSA tester (~/tmp/crypt-rsa-sign-test.pl)
reading ~/tmp/crypt-rsa-sign-test.pl-testkey.private
signing blah
PARI:   ***   negative exponent in glog. at ~/lib/MSWin32-x86-multi-thread/Math/Pari.pm line 994.

$ perl crypt-rsa-sign-test.pl asdf
RSA tester (~/tmp/crypt-rsa-sign-test.pl)
reading ~/tmp/crypt-rsa-sign-test.pl-testkey.private
signing blah
-----BEGIN RSA SIGNATURE-----
Version: 1.99
Scheme: Crypt::RSA::SS::PSS

OQAxMjgAU2lnbmF0dXJlU7UxMIX136kFP+o3o7Pf5orq6jeCJWI7qG/uRqCwFgAoUc/LUR9jsmBM
B1Wl6krjm/98qTYUNgNNWgApxsfTFu23jL3LBbrKH50fNql9YuElxYdER0kyFJgX61xmrgivfbm1
Vim4LMMoCSJq2qyhCOEcA1q3zg/p+6U5/Zg8Lbg=
=ufjanyZlBik+n/N3tWigfw==
-----END RSA SIGNATURE-----


$