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package Mail::SpamAssassin::Pyzor::Digest;
# Copyright 2018 cPanel, LLC.
# All rights reserved.
# http://cpanel.net
#
# <@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>
#
use strict;
use warnings;
=encoding utf-8
=head1 NAME
Mail::SpamAssassin::Pyzor::Digest - Pyzor Digest module
=head1 SYNOPSIS
my $digest = Mail::SpamAssassin::Pyzor::Digest::get( $mime_text );
=head1 DESCRIPTION
A reimplementation of L<https://github.com/SpamExperts/pyzor/blob/master/pyzor/digest.py>.
=cut
#----------------------------------------------------------------------
use Mail::SpamAssassin::Pyzor::Digest::Pieces ();
use Digest::SHA qw(sha1_hex);
our $VERSION = '0.03';
#----------------------------------------------------------------------
=head1 FUNCTIONS
=head2 $hex = get( $MSG )
This takes an email message in raw MIME text format (i.e., as saved in the
standard mbox format) and returns the message's Pyzor digest in lower-case
hexadecimal.
The output from this function should normally be identical to that of
the C<pyzor> script's C<digest> command. It is suitable for use in
L<Mail::SpamAssassin::Pyzor::Client>'s request methods.
=cut
sub get {
my ($pms) = @_;
return Digest::SHA::sha1_hex( ${ _get_predigest( $pms ) } );
}
# NB: This is called from the test.
sub _get_predigest { ## no critic qw(RequireArgUnpacking)
my ($pms) = @_;
my $parsed = $pms->get_message();
my @lines;
my $payloads_ar = Mail::SpamAssassin::Pyzor::Digest::Pieces::digest_payloads($parsed);
for my $payload (@$payloads_ar) {
my @p_lines = Mail::SpamAssassin::Pyzor::Digest::Pieces::splitlines($payload);
for my $line (@p_lines) {
Mail::SpamAssassin::Pyzor::Digest::Pieces::normalize($line);
next if !Mail::SpamAssassin::Pyzor::Digest::Pieces::should_handle_line($line);
# Make sure we have an octet string.
utf8::encode($line) if utf8::is_utf8($line);
push @lines, $line;
}
}
my $digest_sr = Mail::SpamAssassin::Pyzor::Digest::Pieces::assemble_lines( \@lines );
return $digest_sr;
}
1;
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