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|
#!/bin/bash
# Copyright (c) 2012 Peter Palfrader <peter@palfrader.org>
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
set -e
set -u
usage() {
echo "Usage: $0 [-v [-v]] [-d <datadir>] <torserver-fpr> <targethost> [<targetport>]"
echo " If torserver-fpr is -, a list of fingerprints is read from stdin"
}
verbose=0
datadir=""
while getopts "vhd:" OPTION
do
case "$OPTION" in
v)
verbose=$((verbose + 1))
;;
h)
usage
exit 0
;;
d)
datadir="$OPTARG"
;;
*)
usage >&2
exit 1
esac
done
shift $(($OPTIND - 1))
if [ "${1:-}" = "--help" ]; then
usage
exit 0
elif [ "$#" -lt 2 ]; then
usage >&2
exit 1
fi
torserver="$1"; shift
hostname="$1"; shift
port="${1:-443}"
socksport=$((RANDOM % 40000 + 20000))
mapaddr="192.0.2.1"
logpid=""
torpid=""
tmpdir=""
cleanup() {
[ -z "$torpid" ] || kill "$torpid" || true
[ -z "$logpid" ] || kill "$logpid" || true
[ -z "$tmpdir" ] || rm -rf "$tmpdir" || true
}
tmpdir=$(mktemp -d "/tmp/cert-check-XXXXXX")
trap 'cleanup' EXIT
pidfile="$tmpdir/pid"
torlog="$tmpdir/log"
if [ "$verbose" -gt 0 ]; then
tail -F "$torlog" &
logpid=$!
fi
if command -v tor > /dev/null; then
tor="tor"
elif [ -x /usr/sbin/tor ]; then
tor="/usr/sbin/tor"
else
echo >&2 "Cannot find tor executable"
exit 1
fi
if [ "$verbose" -gt 1 ]; then
loglevel="info"
else
loglevel="notice"
fi
datadir=${datadir:-$tmpdir/tor}
cat > "$tmpdir/torrc" << EOF
DataDirectory $datadir
RunAsDaemon 1
SocksPort $socksport
PidFile $pidfile
Log $loglevel file $torlog
SafeLogging 0
# MapAddress $mapaddr $hostname.\$$torserver.exit
ControlSocket $tmpdir/sock
StrictNodes 1
EOF
cat > "$tmpdir/torsocks.conf" << EOF
server = 127.0.0.1
server_port = $socksport
EOF
mkdir -p -m 0700 "$datadir"
if [ "$verbose" -gt 0 ]; then hush=""; else hush="--hush"; fi
"$tor" $hush -f "$tmpdir/torrc"
torpid="$(cat $pidfile)"
eatdata() {
local fn="$1"; shift
if [ "$verbose" -gt 0 ]; then
tee "$fn"
else
cat > "$fn"
fi
}
expect_ok() {
local line
read code line <&${COPROC[0]}
line=$(echo "$line" | tr -d '\r')
if ! [ "$code" = "250" ]; then
echo >&2 "Tor said '$code $line' - no idea what that means"
exit 1
fi
}
[ "$verbose" = 0 ] || echo "Directly:"
openssl s_client -no_ticket -showcerts -connect "$hostname":"$port" < /dev/null 2>&1 | eatdata "$tmpdir/cert-direct"
egrep -v '(Session-ID|Master-Key|Start Time):' < "$tmpdir/cert-direct" > "$tmpdir/cert-direct.filtered"
[ "$verbose" = 0 ] || echo "===="
coproc socat UNIX-CONNECT:"$tmpdir/sock" -
echo 'AUTHENTICATE' >&${COPROC[1]}
expect_ok
errors=0
while : ; do
if [ "$torserver" = "-" ]; then
read server
[ -n "$server" ] || break
else
server="$torserver"
fi
[ "$verbose" = 0 ] || echo "Setting ExitNodes $server"
echo "RESETCONF ExitNodes" >&${COPROC[1]}
expect_ok
echo "SETCONF ExitNodes=\$$server" >&${COPROC[1]}
expect_ok
rm -f "$tmpdir/cert-tor" "$tmpdir/cert-tor.filtered"
[ "$verbose" = 0 ] || echo "Via $server:"
TORSOCKS_CONF_FILE="$tmpdir/torsocks.conf" torify openssl s_client -no_ticket -showcerts -connect "$hostname":"$port" < /dev/null 2>&1 | eatdata "$tmpdir/cert-tor"
egrep -v '(Session-ID|Master-Key|Start Time):' < "$tmpdir/cert-tor" > "$tmpdir/cert-tor.filtered"
if diff "$tmpdir/cert-tor.filtered" "$tmpdir/cert-direct.filtered" > /dev/null; then
echo "RESULT: $server: No real differences."
[ "$verbose" = 0 ] || diff -U100 "$tmpdir/cert-tor" "$tmpdir/cert-direct" || true
elif egrep '^connect:errno=' "$tmpdir/cert-tor" > /dev/null; then
[ "$verbose" -lt 1 ] || diff -U100 "$tmpdir/cert-tor" "$tmpdir/cert-direct" || true
echo "RESULT: $server: Connect failed"
errors=1
else
echo "RESULT: $server: differences!"
[ "$verbose" = 0 ] || echo "===="
[ "$verbose" = 0 ] || echo "Diff:"
diff -U100 "$tmpdir/cert-tor" "$tmpdir/cert-direct" || true
errors=1
fi
[ "$torserver" = "-" ] || break
done
exit "$errors"
|
