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#!/bin/sh
########################################################
## ez-pine-gpg-incoming ##
## part of ez-pine-gpg v0.4h // gpg filters for pine ##
## http://Business-PHP.com/opensource/ez-pine-gpg/ ##
## (c) 13 Feb 2004, Atom Emet ##
## (c) 16 Dec 2004, Atom Emet ##
## Atom {at} Business-PHP.com ##
## Distributed under the GNU General Public License ##
## http://www.gnu.org/copyleft/gpl.html ##
## ##
## ################################################ ##
## ##
## This program is free software; you can ##
## redistribute it and/or modify it under the terms ##
## of the GNU General Public License as published by ##
## the Free Software Foundation; either version 2 of ##
## the License, or (at your option) any later ##
## version. ##
## ##
## This program is distributed in the hope that it ##
## will be useful, but WITHOUT ANY WARRANTY; without ##
## even the implied warranty of MERCHANTABILITY or ##
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU ##
## General Public License for more details. ##
## ##
## You should have received a copy of the GNU ##
## General Public License along with this program; ##
## if not, write to the ##
## Free Software Foundation, Inc., ##
## 59 Temple Place - Suite 330, ##
## Boston, MA 02111-1307, USA. ##
########################################################
#########################################
## PATH is configured during installation
PATH=/bin:/usr/bin:/home/bnewbold/bin
###################
## clear the screen
clear 1>&2
echo '#########################################################################' 1>&2
echo '## This message is being processed by ez-pine-gpg v0.4h ##' 1>&2
echo '## http://Business-PHP.com/opensource/ez-pine-gpg/ ##' 1>&2
echo '## (c) 13 Feb 2004, Atom Emet ##' 1>&2
echo '## (c) 16 Dec 2004, Atom Emet ##' 1>&2
echo '## Distributed under the GNU General Public License ##' 1>&2
echo '## See source for details ##' 1>&2
echo '#########################################################################' 1>&2
####################################################
## if things go wrong, this notice will be displayed
## along with the incoming message
##
gpg_failed () {
echo '%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%'
echo '%%%%%%%%%%%% Something went wrong --- See above for more info %%%%%%%%%%%%'
echo '%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%'
#############################
## if the message is textmode
if [ "${textmode}" = 'yes' ]
then
############################################################
## display the input and un-dash-escape any clearsigned text
echo "${input}" | sed '/^-----BEGIN PGP SIGNED MESSAGE-----/,/^-----BEGIN PGP SIGNATURE-----/ s/^- -/-/'
elif [ "${textmode}" = 'no' ] && [ "${stdout}" ]
then
#######################################
## if the message seems to be encrypted
## and gpg produces STDOUT display the decrypted message
echo "${stdout}"
else
##############################################################################
## if we're here then the message was encrypted but not successfully decrypted
## just display the input
echo "${input}"
fi
#############################################
## unset variables that we don't need anymore
input= ; stdout= ; textmode=
############################################
## just because something went wrong doesn't
## mean that pine needs to know about it.
## a zero exit status makes pine happy
clear 1>&2
exit 0
}
###########################################
## do the right thing even if ^C is pressed
##
trap 'gpg_failed' 2
############################################################
## create a variable "input" containing STDIN to this script
##
input="`cat`"
#####################################################
## test if the message in textmode or binary/armored?
if echo "${input}" | gpg --list-only --list-packets 2>&1 | egrep -q '^[[:space:]]+mode t'
then
export textmode=yes
else
export textmode=no
fi
##############################################################
## echo a message that let's us know ez-pine-gpg is being used
## and display the machine name and current date/time
##
echo '##########################################################################'
echo '## ez-pine-gpg v0.4h ## http://Business-PHP.com/opensource/ez-pine-gpg/'
echo "## `date` ## `uname -n`"
echo '##########################################################################'
#################################################
## display some information about the the message
## we're only concerned with STDERR
echo "${input}" | gpg --list-only > /dev/null
###############################################
## the variable "stdout" is the output from gpg
## notices from gpg STDERR are redirected to STDOUT and displayed
## if gpg fails then bail out with an error message
##
{ stdout="`echo "${input}" | gpg --decrypt`" || gpg_failed ; } 2>&1
#############################################
## figure out how to best display the message
##
if [ "${textmode}" = 'no' ]
then
########################################################
## if the message is armored display the output from gpg
echo '%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%'
echo '%%%%%%%%%%%%%%%%%%%%%%%% OpenPGP ENCODED MESSAGE %%%%%%%%%%%%%%%%%%%%%%%%%'
echo '%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%'
echo "${stdout}"
else
##########################################################################################
## if the message is clearsigned (or malformed?) display the input and un-dash-escape text
echo '%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%'
echo '%%%%%%%%%%%%%%%%%%%%%%%%% OpenPGP SIGNED MESSAGE %%%%%%%%%%%%%%%%%%%%%%%%%'
echo '%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%'
echo "${input}" | sed '/^-----BEGIN PGP SIGNED MESSAGE-----/,/^-----BEGIN PGP SIGNATURE-----/ s/^- -/-/'
fi
###########################
## get rid of the variables
## containing the message
input= ; stdout= ; textmode=
#############
## we're done
##
exit 0
|
