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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.
-
-