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
Phil Karn
Tom Jennings
Eric Hughes
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
