/usr/share/perl5/News/Article/NoCeM.pm is in libnews-article-nocem-perl 0.08-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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$VERSION = '0.08';
# -*- Perl -*- Sat Dec 4 21:11:45 CST 2004
#############################################################################
# Written by Yen-Ming Lee <leeym@leeym.com>
# Based on a module by Tim Skirvin <tskirvin@killfile.org>, and relying almost
# exclusively on the News::Article package written by Andrew Gierth
# <andrew@erlenstar.demon.co.uk>. Thanks, folks.
#
# Copyright 2004-2005 Yen-Ming Lee. Redistribution terms are in the
# documentation, and I'm sure you can find them.
#############################################################################
=head1 NAME
News::Article::NoCeM - a module to generate accurate nocem notices
=head1 SYNOPSIS
use News::Article::NoCeM;
my $nocem = new News::Article::NoCeM();
$nocem->hide($type, $spam);
$nocem->make_notice($type, $name, $issuer, $group, $prefix);
$nocem->sign($keyid, $passphrase);
$nocem->issue($conn, $ihave);
=head1 DESCRIPTION
Creates a nocem notice on the Usenet articles, which may be posted
normally to hide the messages.
=head1 USAGE
=over 2
=item use News::Article::NoCeM;
=back
News::Article::NoCeM is class that inherits News::Article and adds four
new functions: hide(), make_notice(), sign() and issue(),
redefine to disable two functions: post() and ihave().
=cut
require 5; # Requires Perl 5
use News::Article;
use PGP::Sign;
use Exporter;
use strict;
use vars qw( @ISA @EXPORT @EXPORT_OK $VERSION );
@ISA = qw( Exporter News::Article );
=head2 Article Methods
=over 4
=item hide ( TYPE, ARTICLE, [ARTICLE, ...] )
Hide one or more articles in the given C<TYPE>. C<ARTICLE> is an
News::Article object that going to be hid. hide() will skip
the articles without Newsgroup or Message-ID and skip the ones
already hid.
hide() returns the number of the articles hid.
=cut
sub hide
{
my $self = shift;
my $type = shift;
my @articles = @_;
my $num;
foreach my $article (@articles)
{
my $newsgroups = $article->header('newsgroups');
my $message_id = $article->header('message-id');
next if !$newsgroups || !$message_id;
next if $self->{'NoCeM'}->{$type}->{$message_id};
$self->{'NoCeM'}->{$type}->{$message_id} = $newsgroups;
++$num;
}
return $num;
}
push @EXPORT, qw( hide );
=item post
=item ihave
post() and ihave() is disabled in News::Article::NoCeM.
Please use issue() instead.
=cut
sub post
{
my $self = shift;
die "You should use issue(conn, 0) instead of post() in " . ref($self) . "\n";
}
push @EXPORT, qw( post );
sub ihave
{
my $self = shift;
die "You should use issue(conn, 1) instead of ihave() in " . ref($self) . "\n";
}
push @EXPORT, qw( ihave );
=item make_notice ( TYPE, NAME, GROUP, ISSUER, [ PREFIX ] )
Retrive articles marked by hide with C<TYPE>, and make a notice
fot them. If there's only one type within a container, then the container
itself can be a notice. C<NAME> is the identifier of the issuer. C<GROUP> is
the newsgroup the you will post nocem notice to. C<ISSUER> is the email address
of the issuer. C<PREFIX> is the announcement before the nocem notice, which may
explain the criteria of this notice, or where to find your public key for
PGP verification.
make_notice() returns a News::Article::NoCeM object if success, and return undef
if no article is hid.
=cut
sub make_notice
{
my $self = shift;
my $type = shift;
my $name = shift;
my $group = shift;
my $issuer = shift;
my $prefix = shift;
my $now = time();
my $ncmid = "$name-$type.$now";
my $count = scalar keys %{ $self->{'NoCeM'}->{$type} };
return if !$count;
$self->set_body();
$self->add_body($prefix);
$self->add_body("");
$self->add_body("\@\@BEGIN NCM HEADERS
Version: 0.9
Issuer: $issuer
Type: $type
Action: hide
Count: $count
Notice-ID: $ncmid
\@\@BEGIN NCM BODY");
foreach my $msgid (keys %{ $self->{'NoCeM'}->{$type} })
{
my @groups = split(',', $self->{'NoCeM'}->{$type}->{$msgid});
$self->add_body("$msgid\t" . shift(@groups));
foreach my $g (@groups) { $self->add_body("\t$g"); }
}
$self->add_body("\@\@END NCM BODY");
$self->set_headers('Subject', "\@\@NCM $name-$type NoCeM notice $now");
$self->set_headers('Newsgroups', $group);
$self->set_headers('From', $issuer);
$self->set_headers('X-Issued-By', ref($self) . "-" . $VERSION);
$self->set_headers('Path', "nocem!not-for-mail");
$self->add_date();
delete($self->{Headers}{'message-id'});
$self->add_message_id();
return $self;
}
push @EXPORT, qw( make_notice );
=item sign ( KEYID, PASSPHRASE )
Sign the content of the nocem notice with C<KEYID> and C<PASSPHRASE>.
Please make sure that the issuer's public/secret keyring is ready.
sign() returns a News::Article::NoCeM object if success, and return undef
if no article is hid, or pgp_sign failed.
=cut
sub sign
{
my $self = shift;
my $keyid = shift;
my $passphrase = shift;
return if !scalar(@{$self->body()});
my $body = join("\n", @{$self->body()}) . "\n";
my ($signature, $version) = pgp_sign($keyid, $passphrase, $body);
return if !$signature;
$self->set_body();
$self->add_body("-----BEGIN PGP SIGNED MESSAGE-----");
$self->add_body("Hash: SHA1");
$self->add_body("");
$self->add_body($body);
$self->add_body("");
$self->add_body("-----BEGIN PGP SIGNATURE-----");
$self->add_body("Version: $version");
$self->add_body("");
$self->add_body($signature);
$self->add_body("-----END PGP SIGNATURE-----");
return $self;
}
push @EXPORT, qw( sign );
=item issue ( [ CONN, IHAVE ] )
Take optional C<CONN> as a Net::NNTP object and issue the nocem notice.
C<IHAVE> indicates that call Net::NNTP::ihave() for submitting the notice,
otherwise issue() will call News::Article::post() by default.
issue() return the result of News::Article::post() or issue().
=back
=cut
sub issue
{
my $self = shift;
my $conn = shift;
my $ihave = shift;
return if !scalar(@{$self->body()});
return $ihave ? $self->SUPER::ihave($conn) : $self->SUPER::post($conn);
}
push @EXPORT, qw( issue );
=head1 NOTES
Standard article manipulation information can be read in the News::Article
manpages.
NoCeM FAQ is available on the web at <URL:http://www.cm.org/faq.html>.
=head1 AUTHOR
Written by Yen-Ming Lee <leeym@leeym.com>, based on a module by
Tim Skirvin <tskirvin@killfile.org>.
=head1 COPYRIGHT
Copyright 2004-2005 by Yen-Ming Lee <leeym@leeym.com>.
This code may be redistributed under the same terms as Perl itself.
=cut
1;
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