#!/usr/bin/bash

if [ $(/usr/bin/id -u) != 0 ]; then echo "only root can do that"; exit 2; fi

#***************************************************************************
# This file is part of the CRYPTO BONE
# File     : cron.fetchmail 
# Version  : 1.6 (ALL-IN-ONE)
# License  : BSD
# Date     : 1 May 2023
# Contact  : Please send enquiries and bug-reports to innovation@senderek.ie
#
#
# Copyright (c) 2015-2023
#	Ralf Senderek, Ireland.  All rights reserved. (https://senderek.ie)
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#	   This product includes software developed by Ralf Senderek.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND  ANY EXPRESS OR 
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE  IMPLIED WARRANTIES 
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
# POSSIBILITY OF SUCH DAMAGE.
#****************************************************************************

RAM=/dev/shm/RAM
FETCH=${RAM}/fetch
BATCH=${RAM}/batch
SOCK=/usr/lib/cryptobone/secrets.sock

/usr/bin/mkdir ${RAM}/IN 2> /dev/null
/usr/bin/mkdir ${RAM}/FORENSIC 2> /dev/null
/usr/bin/mkdir ${RAM}/MESSAGES 2> /dev/null
/usr/bin/mkdir ${RAM}/FILES 2> /dev/null
/usr/bin/chmod 700 ${RAM}/MESSAGES ${RAM}/IN ${RAM}/FORENSIC ${RAM}/FILES 2> /dev/null

# only run fetchmail if GUI is active and $RAM/GUI exists
if [ -s $RAM/GUI ]
then
     # check if GUI is still active
     NOW=$(date +%s)
     LAST=$(cat $RAM/GUI 2> /dev/null)
     delta=$(( $NOW - $LAST ))
     echo $delta > $RAM/delta
     if [ $delta -gt 600 ]
     then
          date +%s > $RAM/exit
	  # grace time is over
	  /usr/bin/rm -f $RAM/GUI $RAM/delta
     fi
fi     


if [ -L /usr/lib/cryptobone/ALLINONE ] && [ -d ${RAM} ] && [ -s $RAM/GUI ] ; then

     # check the transport mechanism
     TRANS=$(echo "get-element transport" | socat -t15 - UNIX-connect:$SOCK 2> /dev/null)
     echo ${TRANS} > $RAM/transport
     if [ ${TRANS}x = "WEBDROPx" ]; then
          /usr/bin/touch $RAM/WEBDROP 2> /dev/null
     else
          # proceed with fetchmail
          /usr/bin/rm -f ${RAM}/WEBDROP 2> /dev/null
     fi
     # make sure the .fetchmail file exists
     if [ ! -r /usr/lib/cryptobone/.fetchmailrc  ]
     then
          /usr/lib/cryptobone/bin/createfetchmailrc 2> /dev/null
     fi

     touch $FETCH
     CONFIG=/usr/lib/cryptobone/.fetchmailrc
     ERROR=${RAM}/fetchmail.error
     OUT=${RAM}/fetchmail.output
     
     if [ ${TRANS}x = "WEBDROPx" ]; then
	   # run the safewebdrop code
           /usr/lib/cryptobone/safewebdrop/bin/safewebdroprequest
	   # if safewebdrops are received they are stored in ${FETCH}
     else     
           /usr/bin/fetchmail -f $CONFIG  -p AUTO -t 45 --nosslcertck --all --bsmtp ${FETCH} 2> $ERROR > $OUT
     fi 
     /usr/bin/chmod 600 $OUT $ERROR 2> /dev/null
     if [[ -r $FETCH ]]; then
          /usr/bin/chmod 600 $FETCH 2> /dev/null
     fi

     if [ -r $FETCH ] ; then
          /usr/bin/mv $FETCH ${RAM} 2> /dev/null

          if [ ${TRANS}x = "WEBDROPx" ]; then
                /usr/lib/cryptobone/safewebdrop/bin/analysebatchfile-safewebdrop 2> /dev/null
	  else
                # split the file into messages and analyse them all
                /usr/lib/cryptobone/bin/analysebatchfile 2> /dev/null
          fi
          MAILFILE="${RAM}/fetch-$(/usr/bin/date +%y.%m.%d-%H.%M)"

          /usr/bin/mv ${RAM}/fetch $MAILFILE 2> /dev/null
          /usr/bin/chmod 400 $MAILFILE 2> /dev/null
	  # remove if size is 0
	  if [ ! -s $MAILFILE ]
	  then
               /usr/bin/rm -f $MAILFILE  
	  fi
     fi
fi

if [ -L /usr/lib/cryptobone/ext/masterkey ] && [ -d /dev/shm/EXRAM ] ; then
     # check for active GUI in ext
     /usr/lib/cryptobone/ext/cron.fetchmail
fi