#!/bin/sh
#
# pgp-mime-sig-description
#
# Update the PGP MIME signature description meta data
#
# Copyright © 2016 martin f. krafft <madduck@madduck.net>
# Released under the terms of the Artistic Licence 2.0
#
set -eu

MIME_HEADER="Content-Type: application\/pgp-signature"
DESCRIPTION="Digital GPG signature (see http://martin-krafft.net/gpg/sig-policy/999bbcc4/current)"
sed -i -e "/^${MIME_HEADER}/s/signature.asc/digital_signature_gpg.asc/;
           /^${MIME_HEADER}/aContent-Description: $DESCRIPTION" "$1"