From: peter honeyman <honey@citi.umich.edu>
Date: Mon, 31 May 93 20:10:26 PDT
To: tcmay@netcom.com (Timothy C. May)
Subject: Re: Clipperpunks Write Code?
In-Reply-To: <9305312100.AA22836@netcom3.netcom.com>
Message-ID: <9306010310.AA14901@toad.com>
MIME-Version: 1.0
Content-Type: text/plain


>                 If "Cypherpunks write code", how much code has been written
> lately?

this is not a major hack, but a fun one.  i've never been big on the details
of pgp's trust model, with "trusted", "sort of trusted", etc.  the keys
i trust most are those i have signed.  by extension, what i want to know is
the "signature distance" of a given key.  so here's my hack, a shell script
that uses pgp and pathalias to compute signature distance.  here's a sample:

  reno:; ./pgpwho hughes@soda honey
  peter honeyman <honey@citi.umich.edu>
  Phil Karn <karn@qualcomm.com>
  Tom Jennings <tomj@fido.wps.com>
  Eric Hughes <hughes@soda.berkeley.edu>

actually, it's much more verbose than that, but that will change.
so far, i find the script useful.  here it is.

	peter

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
#!/bin/sh
# usage: pgpwho [ who [ me ] ]

# @(#)pgpwho	1.1 93/05/31
# public domain.   send comments to honey@citi.umich.edu.

case $# in
0)	argwho=
	arglocal=;;
1)	argwho=$1
	arglocal=;;
2)	arglocal=$2
	if [ "$1" != "-" ]; then
		argwho=$1
	else
		argwho=
	fi;;
*)	echo usage: pgpwho [ who [ me ] ]
	exit 1;;
esac

find kvv pain reach -size 0 -exec rm -f '{}' ';' >/dev/null 2>&1

if [ ! -r kvv ]; then
	kvv=
else
	kvv=`find kvv -newer $PGPPATH/pubring.pgp -print`
fi

case "$kvv" in
kvv)	echo "kvv is up to date";;
*)	echo "dumping keys (pgp -kvv) ..."
	pgp -kvv > kvv;;
esac

if [ ! -r pain ]; then
	pain=
else
	pain=`find pain -newer kvv -print`
fi

case "$pain" in
pain)	echo "pain is up to date";;
*)	echo "massaging kvv into pain (pathalias input) ..."
	cat kvv | awk '
		$1 == "pub" {
			num = split($2, bitskeyid, "/");
			if (num != 2) {
				print "???", $0
				next;
			}
			nkeys++;
			keyid = bitskeyid[2]
			user = "";
			for (j = 4; j <= NF; j++)
				user = user " " $j
			userid[keyid] = user;
			}

		$1 == "sig" {
			if ($2 != keyid)
				print $2, keyid, "(1)"
		}

		END {
			for (i in userid)
				print "#", i, userid[i];
		}
	' > pain;;
esac

while :; do
	if [ -z "$arglocal" ]; then
		echo -n "what is your pgp id? "
		read arglocal
	fi
	grep -i "^pub.*$arglocal" kvv | tee tmp
	case `wc -l < tmp|sed 's/ //g'` in
	0)	echo $arglocal not found, try again;;
	1)	break;;
	*)	echo too many matches for id $arglocal, please narrow it down;;
	esac
	arglocal=
done
local=`awk '{print $2}' tmp | sed 's/.*\///'`

while :; do
	if [ -z "$argwho" ]; then
		echo -n "who? "
		read argwho
	fi
	grep -i "^pub.*$argwho" kvv | tee tmp
	case `wc -l < tmp|sed 's/ //g'` in
	0)	echo $argwho not found, try again;;
	1)	break;;
	*)	echo too many matches for $argwho, please narrow it down;;
	esac
	argwho=
done
who=`grep "^pub" tmp | awk '{print $2}' | sed 's/.*\///'`

if [ ! -r reach ]; then
	reach=
else
	reach=`find reach -newer pain -print`
fi

case "$reach" in
reach)	echo "reach is up to date";;
*)	echo "running pathalias ..."
	pathalias -l $local -c pain 2>xxx-errs | tee xxx | awk '$1 < 10000 {print}' > reach;;
esac

echo "searching for $who ..."

grep "	$who	" reach | sed -e 's/.*	//' -e 's/%s//' -e 's/!/ /g' > tmp
case `wc -l < tmp|sed 's/ //g'` in
0)	echo no signature path to $who
	exit 1;;
1)	;;
*)	echo weird error
	exit -1;;
esac

set `cat tmp`

grep "^# $local" pain | sed -e 's/..........//'
for i in $*; do
	grep "^# $i" pain | sed -e 's/..........//'
done

rm -f tmp
exit