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- #!/bin/bash
- #
- # Copyright (c) 2020 Bubble, Inc. All rights reserved. For personal (non-commercial) use, see license: https://bubblev.com/bubble-license/
- #
- LOG=/tmp/bubble.mitmdump_monitor.log
-
- function die {
- echo 1>&2 "${1}"
- log "${1}"
- exit 1
- }
-
- function log {
- echo "$(date): ${1}" >> ${LOG}
- }
-
- BUBBLE_MITM_MARKER=/home/bubble/.mitmdump_monitor
- ROOT_KEY_MARKER=/usr/share/bubble/mitmdump_monitor
-
- # Start with MITM proxy turned off
- if [[ ! -f ${BUBBLE_MITM_MARKER} ]] ; then
- echo -n off > ${BUBBLE_MITM_MARKER} && chown bubble ${BUBBLE_MITM_MARKER}
- fi
- if [[ ! -f ${ROOT_KEY_MARKER} ]] ; then
- sleep 1s
- mkdir -p "$(dirname ${ROOT_KEY_MARKER})" && chmod 755 "$(dirname ${ROOT_KEY_MARKER})"
- echo -n on > ${ROOT_KEY_MARKER} && touch ${ROOT_KEY_MARKER} && chmod 644 ${ROOT_KEY_MARKER}
- fi
-
- function ensureMitmOn {
- log "Flushing PREROUTING before enabling MITM services"
- iptables -F PREROUTING -t nat || log "Error flushing port forwarding when enabling MITM services"
- log "Enabling MITM port forwarding on TCP port 80 -> 8888"
- iptables -I PREROUTING 1 -t nat -p tcp --dport 80 -j REDIRECT --to-ports 8888 || log "Error enabling MITM port forwarding 80 -> 8888"
- log "Enabling MITM port forwarding on TCP port 443 -> 8888"
- iptables -I PREROUTING 1 -t nat -p tcp --dport 443 -j REDIRECT --to-ports 8888 || log "Error enabling MITM port forwarding 443 -> 8888"
- echo -n on > ${ROOT_KEY_MARKER}
- }
-
- function ensureMitmOff {
- log "Flushing PREROUTING to disable MITM services"
- iptables -F PREROUTING -t nat || log "Error flushing port forwarding when disabling MITM services"
- echo -n off > ${ROOT_KEY_MARKER}
- }
-
- log "Watching marker file ${BUBBLE_MITM_MARKER} ..."
- sleep 2s && touch ${BUBBLE_MITM_MARKER} # first time through, always check and set on/off state
- while : ; do
- if [[ $(stat -c %Y ${BUBBLE_MITM_MARKER}) -gt $(stat -c %Y ${ROOT_KEY_MARKER}) ]] ; then
- if [[ ! -z "$(cmp -b ${ROOT_KEY_MARKER} ${BUBBLE_MITM_MARKER})" ]] ; then
- if [[ "$(cat ${BUBBLE_MITM_MARKER} | tr -d [[:space:]])" == "on" ]] ; then
- ensureMitmOn
- elif [[ "$(cat ${BUBBLE_MITM_MARKER} | tr -d [[:space:]])" == "off" ]] ; then
- ensureMitmOff
- else
- log "Error: marker file ${BUBBLE_MITM_MARKER} contained invalid value: $(cat ${BUBBLE_MITM_MARKER} | head -c 5)"
- fi
- fi
- fi
- sleep 5s
- done
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