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Subject: Re: PGP with mail/news
Date: Fri, 8 Jan 1993 05:14:09 GMT
From: res@colnet.cmhnet.org (Rob Stampfli)
Lines: 50
>}one feature i discovered that would be nice to have in PGP: a switch
>}that tells it to sign only the body of a message, instead of the whole
>}thing.
This is really very easy to accomplish external to pgp. Here is an example
of a shell script that sits between the mailer program and /bin/mail, which
does exactly what you want. It was written before the implemenation of
+clearsig, but it should work just fine with it.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# This script is invoked by adding the line "set sendmail=pgpmail" to your
# .mailrc file. mailx then invokes pgpmail instead of /bin/mail to deliver
# email. This script checks whether outbound encryption is specified, and
# automatically performs it as required.
trap "" 1 2 3 # req'd since this can run in bg
exec 2>/dev/tty # can be "exec 2>/dev/null"
nl="" en="" sg=""
for i # for each argument...
do
case "$i" in # look for encryption specifier...
# *encrypt=*) en="`sed 's/.*=//'`" # this line req'd if SHELL=sh
*encrypt=*) en="${i#*=}";; # this line is faster if SHELL=ksh
*sig=*) sg="${i#*=}";; # a pgp signature specification...
*) nl="$nl $i";; # a real mail address...
esac
done
[ X = "X$en" ] && exec /bin/rmail "$@" # encryption was not requested
( # encryption *was* specified
OIFS="$IFS" # needed to preserve tabs in header
IFS='
'
while read x # read and process header intact
do
print - "$x"
[ "" = "$x" ] && break
done
IFS="$OIFS" # reset field separators
if [ X = "X$sg" ]; then # no signature specified:
pgp -feat "$en" # feed the rest to encryption pgm
else # a signature was specified:
pgp -feast "$en" -u "$sg" # feed pgp...
fi
echo "Encryption phase completed" 1>&2
) | /bin/rmail $nl
--
Rob Stampfli rob@colnet.cmhnet.org The neat thing about standards:
614-864-9377 HAM RADIO: kd8wk@n8jyv.oh There are so many to choose from.
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