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# <@LICENSE>
# 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.
# </@LICENSE>
=head1 NAME
Mail::SpamAssassin::Plugin::WelcomeListSubject - welcomelist by Subject header
=head1 SYNOPSIS
loadplugin Mail::SpamAssassin::Plugin::WelcomeListSubject
header SUBJECT_IN_WELCOMELIST eval:check_subject_in_welcomelist()
header SUBJECT_IN_BLOCKLIST eval:check_subject_in_blocklist()
score SUBJECT_IN_WELCOMELIST -100
score SUBJECT_IN_BLOCKLIST 100
welcomelist_subject [Bug *]
blocklist_subject Make Money Fast
=head1 DESCRIPTION
This SpamAssassin plugin module provides eval tests for welcomelisting and
blocklisting particular strings in the Subject header. String will match
anywhere in the subject. The value for welcomelist_subject or blocklist_subject
are strings which may contain file -glob -style patterns, similar to the
other welcomelist_* config options. Note that each subject/string must be a
separate *_subject command, all whitespace is included in the string.
=cut
package Mail::SpamAssassin::Plugin::WelcomeListSubject;
use Mail::SpamAssassin::Plugin;
use Mail::SpamAssassin::Util qw(compile_regexp);
use strict;
use warnings;
# use bytes;
use re 'taint';
our @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_welcomelist", $Mail::SpamAssassin::Conf::TYPE_HEAD_EVALS);
$self->register_eval_rule ("check_subject_in_whitelist", $Mail::SpamAssassin::Conf::TYPE_HEAD_EVALS); # removed in 4.1
$self->register_eval_rule ("check_subject_in_blocklist", $Mail::SpamAssassin::Conf::TYPE_HEAD_EVALS);
$self->register_eval_rule ("check_subject_in_blacklist", $Mail::SpamAssassin::Conf::TYPE_HEAD_EVALS); # removed in 4.1
$self->set_config($mailsaobject->{conf});
return $self;
}
sub set_config {
my ($self, $conf) = @_;
my @cmds;
push(@cmds, {
setting => 'welcomelist_subject',
aliases => ['whitelist_subject'], # removed in 4.1
default => {},
type => $Mail::SpamAssassin::Conf::CONF_TYPE_ADDRLIST,
code => sub {
my ($self, $key, $value, $line) = @_;
$value = lc $value;
my $re = $value;
$re =~ s/([^\*\?_a-zA-Z0-9])/\\$1/g; # escape any possible metachars
$re =~ tr/?/./; # "?" -> "."
$re =~ s/\*+/\.\*/g; # "*" -> "any string"
my ($rec, $err) = compile_regexp($re, 0);
if (!$rec) {
warn "could not compile $key '$value': $err";
return;
}
$conf->{$key}->{$value} = $rec;
}});
push(@cmds, {
setting => 'blocklist_subject',
aliases => ['blacklist_subject'], # removed in 4.1
default => {},
type => $Mail::SpamAssassin::Conf::CONF_TYPE_ADDRLIST,
code => sub {
my ($self, $key, $value, $line) = @_;
$value = lc $value;
my $re = $value;
$re =~ s/([^\*\?_a-zA-Z0-9])/\\$1/g; # escape any possible metachars
$re =~ tr/?/./; # "?" -> "."
$re =~ s/\*+/\.\*/g; # "*" -> "any string"
my ($rec, $err) = compile_regexp($re, 0);
if (!$rec) {
warn "could not compile $key '$value': $err";
return;
}
$conf->{$key}->{$value} = $rec;
}});
$conf->{parser}->register_commands(\@cmds);
}
sub check_subject_in_welcomelist {
my ($self, $permsgstatus) = @_;
my $subject = $permsgstatus->get('Subject');
return 0 unless $subject ne '';
return $self->_check_subject($permsgstatus->{conf}->{welcomelist_subject}, $subject);
}
*check_subject_in_whitelist = \&check_subject_in_welcomelist; # removed in 4.1
sub check_subject_in_blocklist {
my ($self, $permsgstatus) = @_;
my $subject = $permsgstatus->get('Subject');
return 0 unless $subject ne '';
return $self->_check_subject($permsgstatus->{conf}->{blocklist_subject}, $subject);
}
*check_subject_in_blacklist = \&check_subject_in_blocklist; # removed in 4.1
sub _check_subject {
my ($self, $list, $subject) = @_;
$subject = lc $subject;
return 1 if defined($list->{$subject});
foreach my $regexp (values %{$list}) {
if ($subject =~ $regexp) {
return 1;
}
}
return 0;
}
1;
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