#!/bin/sh

# This is an amateur script to send mixmaster with cleartext bodies with Sylpheed-Claws 
# from Kai Raven <kairaven@arcor.de> / OpenPGP: D6E995A0.
# Maybe somebody with skills in scripting or graphical GUI design can
# make a better one and/or a nice client.
# License: GPL
#
# You need:
#
# Sylpheed-Claws
# http://claws.sylpheed.org/
#
# a mail server to send Mixmaster messages. You can use Mixmaster's own mail
# sending capabilities, but than you loose additional encryption and encrypted transport
# of your mail server password, because Mixmaster offers only plaintext LOGIN and AUTH. 
#
# Mixmaster
# http://mixmaster.sourceforge.net/
# and in Mixmaster's configuration file ~/.mixmaster/mix.cfg
# CHAIN *...,fromremailer   # exit remailer, which does allow from: headers
#
# Xdialog
# http://xdialog.dyns.net/
#
# a temp dir with tmpfs like this one (from fstab) or use simply /tmp
# none                    /tmp/remail          tmpfs   defaults,size=1m       0 0
#
# Usage:
# 1. Save the script as "syl-mixmaster-cleartext" in your path
# 2. Make an action in Sylpheed-Claws: Configuration -> Actions:
#    Menu name: Mixmaster/Mixmaster-Cleartext
#    Command line: |syl-mixmaster-cleartext
# 3. Write a new message and choose Tools -> Actions -> Mixmaster ->Mixmaster-Cleartext

MIXTMP="/tmp/remail"
SYLTMP="$MIXTMP/syltmp"
MIXP="$HOME/.mixmaster/mixmaster"

# ask for message headers, Sylpheed-Claws can't supply from the editor window
HEADER=`Xdialog	--stdout --separator "|" \
		--title "Mixmaster - Cleartext" --buttons-style text \
		--left --ok-label Send --cancel-label Abort \
		--3inputsbox "Fill in your pseudonym, recipient's e-mail address and subject" 0 0 \
                 "Pseudonym (nick's firstname surname):" "" \
		 "Recipient's e-mail address:" "" \
		 "Subject:" "" \
		--no-close --no-cancel --no-buttons --infobox "Done" 0 0 1`

ret=$?

# put the message headers in the mixmaster message file
case $ret in
	0)
		FROM=`echo $HEADER | awk --source 'BEGIN { FS="|" }' --source '{ print $1 }'` && echo From: $FROM > $SYLTMP
		TO=`echo $HEADER | awk --source 'BEGIN { FS="|" }' --source '{ print $2 }'` && echo To: $TO >> $SYLTMP
    		SUBJ=`echo $HEADER | awk --source 'BEGIN { FS="|" }' --source '{ print $3 }'` && echo Subject: $SUBJ >> $SYLTMP
		;;
	1)
		shred -uz $MIXTMP/*
    		exit 1
		;;
	255)
		echo "Box closed."
		;;
esac

# content headers for special characters.
# comment, if you don't need it them.
echo "Content-Type: text/plain; charset=UTF-8" >> $SYLTMP
echo "Content-Transfer-Encoding: 8bit" >> $SYLTMP

# get message body from Sylpheed and put the body in the mixmaster message file
echo "" >> $SYLTMP
cat - >> $SYLTMP
echo "" >> $SYLTMP

# send n dummy messages before the real messages
# set NUMCOPIES n in mix.cfg
$MIXP -d

# send Mixmaster message with (NUMCOPIES n) redundant copies from the mixmaster message file 
$MIXP $SYLTMP

# eliminate any evidence
shred -uz $SYLTMP

exit 0