Current File : /home/rs/perl/cpanel/lib/perl5/site_perl/5.8/Mail/DKIM/Canonicalization/relaxed.pm
package Mail::DKIM::Canonicalization::relaxed;
use strict;
use warnings;
our $VERSION = '1.20200907'; # VERSION
# ABSTRACT: common canonicalization
# Copyright 2005 Messiah College. All rights reserved.
# Jason Long <jlong@messiah.edu>
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
use base 'Mail::DKIM::Canonicalization::DkimCommon';
use Carp;
sub init {
my $self = shift;
$self->SUPER::init;
$self->{canonicalize_body_empty_lines} = 0;
}
sub canonicalize_header {
my $self = shift;
croak 'wrong number of parameters' unless ( @_ == 1 );
my ($line) = @_;
#
# step 1: convert all header field names (not the header field values)
# to lower case
#
if ( $line =~ /^([^:]+):(.*)/s ) {
# lowercase field name
$line = lc($1) . ":$2";
}
#
# step 2: unwrap all header field continuation lines... i.e.
# remove any CRLF sequences that are followed by WSP
#
$line =~ s/\015\012(\s)/$1/g;
#
# step 3: convert all sequences of one or more WSP characters to
# a single SP character
#
$line =~ s/[ \t]+/ /g;
#
# step 4: delete all WSP characters at the end of the header field value
#
$line =~ s/ \z//s;
#
# step 5: delete any WSP character remaining before and after the colon
# separating the header field name from the header field value
#
$line =~ s/^([^:\s]+)\s*:\s*/$1:/;
return $line;
}
sub canonicalize_body {
my ($self, $multiline) = @_;
$multiline =~ s/\015\012\z//s;
#
# step 1: reduce all sequences of WSP within a line to a single
# SP character
#
$multiline =~ s/[ \t]+/ /g;
#
# step 2: ignore all white space at the end of lines
#
$multiline =~ s/[ \t]+(?=\015\012|\z)//g;
$multiline .= "\015\012";
#
# step 3: ignore empty lines at the end of the message body
# (i.e. do not emit empty lines until a following nonempty line
# is found)
#
my $empty_lines = $self->{canonicalize_body_empty_lines};
if ( $multiline =~ s/^((?:\015\012)+)// )
{ # count & strip leading empty lines
$empty_lines += length($1) / 2;
}
if ( $empty_lines > 0 && length($multiline) > 0 )
{ # re-insert leading white if any nonempty lines exist
$multiline = ( "\015\012" x $empty_lines ) . $multiline;
$empty_lines = 0;
}
while ( $multiline =~ /\015\012\015\012\z/ )
{ # count & strip trailing empty lines
chop $multiline;
chop $multiline;
$empty_lines++;
}
$self->{canonicalize_body_empty_lines} = $empty_lines;
return $multiline;
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Mail::DKIM::Canonicalization::relaxed - common canonicalization
=head1 VERSION
version 1.20200907
=head1 AUTHORS
=over 4
=item *
Jason Long <jason@long.name>
=item *
Marc Bradshaw <marc@marcbradshaw.net>
=item *
Bron Gondwana <brong@fastmailteam.com> (ARC)
=back
=head1 THANKS
Work on ensuring that this module passes the ARC test suite was
generously sponsored by Valimail (https://www.valimail.com/)
=head1 COPYRIGHT AND LICENSE
=over 4
=item *
Copyright (C) 2013 by Messiah College
=item *
Copyright (C) 2010 by Jason Long
=item *
Copyright (C) 2017 by Standcore LLC
=item *
Copyright (C) 2020 by FastMail Pty Ltd
=back
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.8.6 or,
at your option, any later version of Perl 5 you may have available.
=cut
Mini Shell