Rewrite

android/mitmproxy.sh

@@ -0,0 +1,156 @@
+#!/usr/bin/env sh
+
+res=
+
+choose_emulator() {
+  emulators=($(emulator -list-avds | tr ' ' '\n'))
+
+  if [ ${#emulators[@]} -eq 0 ]; then
+    echo "No avds found. Please create (at least) one"
+    exit 1
+  fi
+
+  echo "Choose one of the following ${#emulators[@]} avds:"
+  i=0
+  for emulator in ${emulators[@]}; do
+    i=$((i+1))
+    echo "  $i) $emulator"
+  done
+  printf "AVD (number): "
+  read avd
+  avd_index=$((avd-1))
+
+  if [ ! -v 'emulators[avd_index]' ]; then
+    echo "'$avd' is not a valid number"
+    exit 1
+  fi
+
+  res=${emulators[$avd_index]}
+}
+
+ca_certname() {
+  certname=$(openssl x509 -inform PEM -subject_hash_old -in ~/.mitmproxy/mitmproxy-ca-cert.cer | head -1)
+  res=$certname.0
+}
+
+ensure_ca_cert() {
+  ca_certname
+  certname=$res
+  cp ~/.mitmproxy/mitmproxy-ca-cert.cer ~/.mitmproxy/$certname
+}
+
+proxy_address() {
+  proxy=$(ip route get 1.1.1.1 | sed -n 's/.*src \([0-9.]\+\).*/\1/p'):8080
+  if [[ -v MITMPROXY_ADDRESS ]]; then
+    proxy=$MITMPROXY_ADDRESS
+    echo "Using proxy address set via 'MITMPROXY_ADDRESS' env variable ($proxy)"
+  else
+    echo "Using default proxy settings ($proxy). Set the 'MITMPROXY_ADDRESS' env variable to overwrite the proxy address. Always use your network address instead of 127.0.0.1"
+  fi
+  res=$proxy
+}
+
+verify_commands() {
+  commands=("adb" "emulator" "mitmproxy")
+  for command in "${commands[@]}"; do
+    which $command &> /dev/null
+    if [ $? -ne 0 ]; then
+      # if the command cannot be found it maybe wasn't added to PATH but still exists on the system
+      case $command in
+        adb)
+          PATH=$PATH:$HOME/Android/Sdk/platform-tools
+          ;;
+        emulator)
+          PATH=$PATH:$HOME/Android/Sdk/emulator
+          ;;
+      esac
+      which $command &> /dev/null
+      if [ $? -ne 0 ]; then
+        echo "command '$command' not found"
+        exit 1
+      fi
+      echo "Warn: command '$command' was found ($(which $command)) but isn't in PATH"
+    fi
+  done
+}
+
+verify_certs() {
+  if [ ! -f ~/.mitmproxy/mitmproxy-ca-cert.cer ]; then
+    echo "mitmproxy ca cert doesn't exist (~/.mitmproxy/mitmproxy-ca-cert.cer). Please run mitmproxy at least once to generate it"
+    exit 1
+  fi
+}
+
+up() {
+  verify_certs
+  choose_emulator
+  avd=$res
+
+  # shut down existing avds
+  down &> /dev/null
+
+  adb kill-server &> /dev/null
+  adb start-server > /dev/null
+  emulator -avd $avd -writable-system > /dev/null &
+  adb wait-for-device
+
+  if [ "$(adb shell getprop ro.build.fingerprint)" = "*/release-keys" ]; then
+    echo "Doesn't work on release android version. Please use an emulator without Google Play."
+    exit 1
+  fi
+
+  ensure_ca_cert
+  ca_certname
+  ca_cert=$res
+
+  adb root
+  # without sleeping adb wouldn't find the emulator
+  sleep 5
+
+  api_version=$(adb shell getprop ro.build.version.sdk)
+  if [[ "$api_version" -gt "28" ]]; then
+    adb shell avbctl disable-verification
+    adb reboot
+    adb wait-for-device
+    adb root
+    sleep 5
+  fi
+
+  adb remount
+
+  adb push ~/.mitmproxy/$ca_cert /system/etc/security/cacerts
+  adb shell chmod 644 /system/etc/security/cacerts/$ca_cert
+
+  adb reboot
+  # wait until device has actually booted. this is required b/c it needs to be booted in order to set the proxy
+  while [ "`adb shell getprop sys.boot_completed 2> /dev/null | tr -d '\r' `" != "1" ]; do sleep 1; done
+
+  proxy_address
+  proxy_addr=$res
+  adb shell settings put global http_proxy $proxy_addr
+}
+
+down() {
+  adb shell settings delete global http_proxy
+  adb shell reboot -p
+}
+
+main() {
+  case "$1" in
+    up)
+      verify_commands
+      up
+      ;;
+    down)
+      verify_commands
+      down
+      ;;
+    *)
+      echo "$0 [up|down]"
+      exit 1
+      ;;
+  esac
+}
+
+main $@
+