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|
#!/bin/bash
# Copyright (c) 2013 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: $0 [<options>] <target> [<target> ...]"
echo "Options:"
echo " -a <auth> use this authority [$AUTH]"
echo " -l <dir> log dir [$LOGDIR]"
echo " -m send mail when a certificate mismatch is found"
echo " -v be a bit verbose"
echo " -h print this help"
}
TORPID=""
CHECKDIR=""
cleanup() {
[ -z "$TORPID" ] || kill "$TORPID" || true
[ -z "$CHECKDIR" ] || rm -rf "$CHECKDIR" || true
}
AUTH=tor.noreply.org
PER_RUN=60
DEFAULT_CHECKHOSTS="www.torproject.org"
LOGDIR="tor-exit-ssl-check-many.log"
CACHEDIR="tor-exit-ssl-check-many.cache"
MAIL=0
CHECKDIR=$(mktemp -d "/tmp/cert-check-many-XXXXXX")
DUMPFILE="$CHECKDIR/dump"
trap 'cleanup' EXIT
mkdir -vp "$LOGDIR"
mkdir -vp "$CACHEDIR"
LOG="$LOGDIR/log"
CTR=0
HOSTNAME=$(hostname)
VERBOSE=0
while getopts "vha:l:m" OPTION
do
case "$OPTION" in
v)
VERBOSE=$((VERBOSE + 1))
;;
h)
usage
exit 0
;;
a)
AUTH="$OPTARG"
;;
l)
LOGDIR="$OPTARG"
;;
m)
MAIL=1
;;
*)
usage >&2
exit 1
esac
done
shift $(($OPTIND - 1))
if [ "${1:-}" = "--help" ]; then
usage
exit 0
fi
declare -a CHECKHOSTS=("$@")
if [ "${#CHECKHOSTS[@]}" = 0 ]; then
for i in $DEFAULT_CHECKHOSTS; do
CHECKHOSTS[${#CHECKHOSTS[@]}]="$i"
done
fi
run_some_checks() {
local idx=$(( RANDOM % ${#CHECKHOSTS[@]} ))
local host="${CHECKHOSTS[$idx]}"
wget -q -O - "http://$AUTH"/tor/status-vote/current/consensus | \
grep -v BadExit | grep '^s .*Exit' -B1 |\
awk '$1 == "r" {print $3}' |\
sort -R | \
head -n "$PER_RUN" | \
while read fpr; do
[ "$VERBOSE" = 0 ] || echo -n "[$(TZ=UTC date +%Y-%m-%dT%H:%M:%SZ)] Checking $host at $fpr..."
if timeout 600 tor-exit-ssl-check -c "$CACHEDIR" -C "$CONTROLSOCKET" "$fpr" $host > "$DUMPFILE" 2>&1; then
ecode=0
else
ecode="$?"
fi
[ "$VERBOSE" = 0 ] || echo "$ecode"
prefix="[$(TZ=UTC date +%Y-%m-%dT%H:%M:%SZ)][$fpr][EC=$ecode]"
case "$ecode" in
0) echo "$prefix OK" >> "$LOG";;
2) echo "$prefix connect failed" >> "$LOG";;
4) echo "$prefix handshake failed" >> "$LOG";;
8) lf="$LOGDIR/$(date +%s).$HOSTNAME.$$.$CTR"
echo "$prefix differences - logged as $lf" >> "$LOG"
CTR=$((CTR + 1))
echo "$fpr" > "$lf"
echo >> "$lf"
cat "$DUMPFILE" >> "$lf"
echo >> "$lf"
wget -q -O - http://"$AUTH"/tor/server/fp/$(echo "$fpr" | perl -MMIME::Base64 -e "print unpack(\"H*\", decode_base64(<>)),\"\n\"") >> "$lf"
if [ "$MAIL" -gt 0 ]; then
(echo "Log file at $lf:"; echo; cat "$lf") | mail -s "certificate mismatch found for relay $fpr" "$USER"
fi
;;
124) echo "$prefix timeout!" >> "$LOG";;
*)
echo "$prefix unknown exit code" >> "$LOG"
echo "$prefix unknown exit code" >&2
cp $DUMPFILE "$LOGDIR/failed-output"
exit 1
esac
done
}
start_tor() {
local pidfile="$CHECKDIR/pid"
if command -v tor > /dev/null; then
tor="tor"
elif [ -x /usr/sbin/tor ]; then
tor="/usr/sbin/tor"
else
echo >&2 "Cannot find tor executable"
exit 1
fi
local datadir="$CHECKDIR/tor"
CONTROLSOCKET="$CHECKDIR/sock"
cat > "$CHECKDIR/torrc" << EOF
DataDirectory $datadir
RunAsDaemon 1
SocksPort auto
PidFile $pidfile
SafeLogging 0
ControlSocket $CONTROLSOCKET
StrictNodes 1
EOF
mkdir -p -m 0700 "$datadir"
"$tor" --hush -f "$CHECKDIR/torrc"
TORPID="$(cat $pidfile)"
}
start_tor
while : ; do
run_some_checks
sleep 60
done
|
