setup-exim-hidden-service

   1 #!/bin/sh
   2 #
   3 # Configure a machine without exim installed as a mail server receiving
   4 # email using SMTP via Tor.
   5
   6 append_if_missing() {
   7     file="$1"
   8     string="$2"
   9     if [ -f "$file" ] && grep -xq "$string" "$file" ; then
  10         :
  11     else
  12         (
  13             if [ -f "$file" ] ; then cat "$file" ; fi
  14             echo "$string"
  15         ) > "$file.new" && mv "$file.new" "$file"
  16     fi
  17 }
  18
  19 DEBIAN_FRONTEND=noninteractive apt-get install -y tor xinetd
  20 torhsdir=$(awk '/^HiddenServiceDir (.*) *$/ { print $2 }' /etc/tor/torrc)
  21 if [ -e "$torhsdir/hostname" ] ; then
  22    torhsname=$(cat "$torhsdir/hostname")
  23 else
  24     echo "*******************************************************************"
  25     echo "* Added Tor hidden service for SMTP (port 25)                     *"
  26     echo "*******************************************************************"
  27     append_if_missing /etc/tor/torrc \
  28         "HiddenServiceDir /var/lib/tor/hidden_service/"
  29     append_if_missing /etc/tor/torrc \
  30         "HiddenServicePort 25 127.0.0.1:25"
  31     mkdir -p /var/lib/tor/hidden_service
  32     chown debian-tor:debian-tor /var/lib/tor/hidden_service
  33     chmod og-rwx /var/lib/tor/hidden_service
  34     service tor restart
  35     if [ -e "$torhsdir/hostname" ] ; then
  36         torhsname=$(cat "$torhsdir/hostname")
  37     else
  38         echo "error: unable to set up Tor hidden service"
  39         exit 1
  40     fi
  41 fi
  42
  43 if dpkg -l exim4-config > /dev/null ; then
  44     echo "******************************************************************"
  45     echo "* Unable to set up SMTP over Tor, exim4-config already installed *"
  46     echo "* Purge the package and try again, or                            *"
  47     echo "* run "dpkg-reconfigure exim4-config" to configure manually.     *"
  48     echo "******************************************************************"
  49     echo "* Enable '$torhsname' as mail domain.
  50     exit 1
  51 fi
  52
  53 cat <<EOF | debconf-set-selections
  54 exim4-config    exim4/dc_eximconfig_configtype  select  internet site; mail is sent and received directly using SMTP
  55 exim4-config    exim4/dc_local_interfaces       string  127.0.0.1 ; ::1
  56 exim4-config    exim4/dc_other_hostnames        string  $torhsname
  57 exim4-config    exim4/use_split_config  boolean true
  58 EOF
  59
  60 DEBIAN_FRONTEND=noninteractive apt-get install -y exim4