#!/bin/sh

# @(#)pmcanon	1.9 (PGP Moose) 97/07/10
# Canonicalisation script for PGP Moose
# (in other words, it takes a news article and turns it
# into something we can compute/check a signature on.)
# Written by Greg Rose, RoSecure Software, Copyright C 1995.

# Be neat and tidy.
TMP=/tmp
TF=$TMP/pgpmt$$
trap "rm -f /$TF.?" 0 1 2 3 15

# Check usage. File must be specified, and result comes out on stdout.
if [ $# -gt 1 ]; then
    echo >&2 "usage: $0 [article]"
    exit 1
fi

cat $1 >$TF.f
sed '/^ *$/q' $TF.f >$TF.h

# multiple greps so we can guarantee order
pmnewsgroups $TF.f
{
    grep -i "^From:" "$TF.h"
    grep -i "^Subject:" "$TF.h"
    grep -i "^Message-ID:" "$TF.h"
} | sed -e 's/^[^:]*: *//' -e 's/: */:/g' -e 's/[ 	]*$//'
sed -e '1,/^ *$/d' \
    -e '/^ *$/d' \
    -e 's/^--/- --/' \
    -e 's/^[Ff][Rr][Oo][Mm]/>&/' \
    -e 's/^[Ss][Uu][Bb][Jj][Ee][Cc][Tt]/>&/' \
    -e 's/^\.$/../' \
    -e 's/^\.[^.]/.&/' \
    -e 's/[ 	]*$//' \
    "$TF.f"