/usr/share/perl5/Mail/Milter/Module/HeaderValidateMIME.pm is in libmail-milter-perl 0.07-1.
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#
# Copyright (c) 2006 Todd Vierling <tv@pobox.com> <tv@duh.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# 3. Neither the name of the author nor the names of contributors may be used
# to endorse or promote products derived from this software without specific
# prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
package Mail::Milter::Module::HeaderValidateMIME;
use 5.006;
use base Exporter;
use base Mail::Milter::Object;
use strict;
use warnings;
use Sendmail::Milter 0.18; # get needed constants
our $VERSION = '0.01';
=pod
=head1 NAME
Mail::Milter::Module::HeaderValidateMIME - enforce MIME header conformance
=head1 SYNOPSIS
use Mail::Milter::Module::HeaderValidateMIME;
my $milter = new Mail::Milter::Module::HeaderValidateMIME();
my $milter2 = &HeaderValidateMIME; # convenience
=head1 DESCRIPTION
This milter module rejects any message at the DATA stage that has one of
the Content-Type: or MIME-Version: headers, but not the other. In the
future, this module may enforce stricter MIME checks.
=cut
our @EXPORT = qw(&HeaderValidateMIME);
sub HeaderValidateMIME {
new Mail::Milter::Module::HeaderValidateMIME(@_);
}
sub envfrom_callback {
shift; # $this
my $ctx = shift;
$ctx->setpriv({});
SMFIS_CONTINUE;
}
sub header_callback {
shift; # $this
my $ctx = shift;
my $hname = lc(shift);
my $priv = $ctx->getpriv();
if ($hname eq 'content-type' || $hname eq 'mime-version') {
$priv->{$hname} = 1;
}
SMFIS_CONTINUE;
}
sub eoh_callback {
shift; # $this
my $ctx = shift;
my $priv = $ctx->getpriv();
if (defined($priv->{'content-type'}) xor defined($priv->{'mime-version'})) {
$ctx->setreply("554", "5.6.0", "Message is corrupt -- RFC2047: MIME-Version and Content-Type must be used together, or not at all");
return SMFIS_REJECT;
}
SMFIS_ACCEPT;
}
1;
__END__
=head1 AUTHOR
Todd Vierling, E<lt>tv@duh.orgE<gt> E<lt>tv@pobox.comE<gt>
=head1 SEE ALSO
L<Mail::Milter::Object>
=cut
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