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package Mail::DKIM::Canonicalization::dk_simple; use strict; use warnings; our $VERSION = '1.20230212'; # VERSION # ABSTRACT: dk simple 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::DkCommon'; 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) = @_; return $line; } sub canonicalize_body { my $self = shift; my ($multiline) = @_; # 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::dk_simple - dk simple canonicalization =head1 VERSION version 1.20230212 =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