/usr/share/perl5/Mail/SpamAssassin/Plugin/WhiteListSubject.pm is in spamassassin 3.4.1-8build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to you under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
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=head1 NAME
Mail::SpamAssassin::Plugin::WhiteListSubject - whitelist by Subject header
=head1 SYNOPSIS
loadplugin Mail::SpamAssassin::Plugin::WhiteListSubject
header SUBJECT_IN_WHITELIST eval:check_subject_in_whitelist()
header SUBJECT_IN_BLACKLIST eval:check_subject_in_blacklist()
score SUBJECT_IN_WHITELIST -100
score SUBJECT_IN_BLACKLIST 100
whitelist_subject [Bug *]
blacklist_subject Make Money Fast
=head1 DESCRIPTION
This SpamAssassin plugin module provides eval tests for whitelisting and blacklisting
particular strings in the Subject header. The value for whitelist_subject or
blacklist_subject are strings which may contain file -glob -style patterns,
similar to the other whitelist_* config options.
=cut
package Mail::SpamAssassin::Plugin::WhiteListSubject;
use Mail::SpamAssassin::Plugin;
use strict;
use warnings;
use bytes;
use re 'taint';
use vars qw(@ISA);
@ISA = qw(Mail::SpamAssassin::Plugin);
# constructor: register the eval rule
sub new {
my $class = shift;
my $mailsaobject = shift;
$class = ref($class) || $class;
my $self = $class->SUPER::new($mailsaobject);
bless ($self, $class);
$self->register_eval_rule ("check_subject_in_whitelist");
$self->register_eval_rule ("check_subject_in_blacklist");
$self->set_config($mailsaobject->{conf});
return $self;
}
sub set_config {
my ($self, $conf) = @_;
my @cmds;
push(@cmds, {
setting => 'whitelist_subject',
default => {},
type => $Mail::SpamAssassin::Conf::CONF_TYPE_ADDRLIST,
code => sub {
my ($self, $key, $value, $line) = @_;
$value = lc $value;
my $re = $value;
$re =~ s/[\000\\\(]/_/gs; # paranoia
$re =~ s/([^\*\?_a-zA-Z0-9])/\\$1/g; # escape any possible metachars
$re =~ tr/?/./; # "?" -> "."
$re =~ s/\*+/\.\*/g; # "*" -> "any string"
$conf->{$key}->{$value} = ${re};
}});
push(@cmds, {
setting => 'blacklist_subject',
default => {},
type => $Mail::SpamAssassin::Conf::CONF_TYPE_ADDRLIST,
code => sub {
my ($self, $key, $value, $line) = @_;
$value = lc $value;
my $re = $value;
$re =~ s/[\000\\\(]/_/gs; # paranoia
$re =~ s/([^\*\?_a-zA-Z0-9])/\\$1/g; # escape any possible metachars
$re =~ tr/?/./; # "?" -> "."
$re =~ s/\*+/\.\*/g; # "*" -> "any string"
$conf->{$key}->{$value} = ${re};
}});
$conf->{parser}->register_commands(\@cmds);
}
sub check_subject_in_whitelist {
my ($self, $permsgstatus) = @_;
my $subject = $permsgstatus->get('Subject');
return 0 unless $subject ne '';
return $self->_check_subject($permsgstatus->{conf}->{whitelist_subject}, $subject);
}
sub check_subject_in_blacklist {
my ($self, $permsgstatus) = @_;
my $subject = $permsgstatus->get('Subject');
return 0 unless $subject ne '';
return $self->_check_subject($permsgstatus->{conf}->{blacklist_subject}, $subject);
}
sub _check_subject {
my ($self, $list, $subject) = @_;
$subject = lc $subject;
return 1 if defined($list->{$subject});
study $subject; # study is a no-op since perl 5.16.0, eliminating bugs
foreach my $regexp (values %{$list}) {
if ($subject =~ qr/$regexp/i) {
return 1;
}
}
return 0;
}
1;
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