#!/usr/bin/bash

##############################################################################
# This file is part of the CRYPTO BONE
# File     : sendtestmessageandattachment  (client)
# Version  : 1.6 (ALL-IN-ONE)
# License  : BSD
# Date     : 12 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.
##############################################################################

# Parameter
# $1 is ID name
# $2 is ID's HOST name
# $3 is RECIPIENT
# $4 is RECIPIENT's SERVER name
# $5 name of the attachment file (relative to home directory)
# $6 overwrites DEBUG

#----------------------------------------------------#
# load functions and global variables
. ./test-functions

if [[ -r ../safewebdrop.config ]] ; then
   . ../safewebdrop.config
fi

# let parameters overwrite ID, IDHOST,  RECIPIENT, HOST and FILENAME
if (( $# >= 3 )) ; then
    ID="$1"
    IDHOST="$2"
    RECIPIENT="$3"
    SERVER="$4"
    FILE=../${ID}/"$5"
    if (( $# == 6 )) ; then
         DEBUG="$6"
    fi
fi

if [[ ${SERVER} = ${IDHOST} ]]; then
    SENDADDR=${ID}
else
    SENDADDR=${ID}%${IDHOST}
fi


if [[ ${DEBUG} = "yes" ]] ; then
    set -vx; exec 2>$0.trc
    /usr/bin/echo "debugging is ON ..."
fi

/usr/bin/echo "***** safewebdrop *****"
/usr/bin/echo "Sending a test message as ${ID} on ${IDHOST} to ${RECIPIENT} at ${SERVER} and attachment ${FILE}"
/usr/bin/echo "***** ----------- *****"
/usr/bin/echo
/usr/bin/echo "Debug = ${DEBUG}"
/usr/bin/echo -n "continue? "
read REPLY
if [[ "${REPLY}x" != "yesx" ]] ; then
    /usr/bin/echo "exiting, yes continues here"
    /usr/bin/echo "usage: sendtestmessage ID IDHOST RECIPIENT HOST FILE [[yes|no]] (overwrites config) "
    exit 1
fi    

# check directory for ${ID}
if [[ ! -d ../${ID} ]] ; then
  /usr/bin/mkdir ../${ID}
fi

# generate a new message
/usr/bin/echo  "Please type your message (finish with <strg>-D or EOT): "
/usr/bin/cat > ${MSG}
if [[ ${FILE} != "none" ]] && [[ ${FILE} ]] ; then
    # add the filename of the attachment
   /usr/bin/echo "Attachment: ${FILE##*/}" >>  ${MSG}  
fi
# encrypt the message with gpg
if [[ -x /usr/bin/gpg ]] ; then
     /usr/bin/rm -f ${MSG}.asc
     /usr/bin/gpg -ca --batch --passphrase ${SEC} ${MSG}
fi

KEY="../${ID}/pubkey.pem"

/usr/bin/echo  "From: ${ID}%${HOST}" > ${NEW} 
/usr/bin/echo >> ${NEW}
/usr/bin/cat ${MSG}.asc >> ${NEW}
if [[ ${FILE} != "none" ]] && [[ ${FILE} ]] ; then
    # add the filename of the attachment
   /usr/bin/echo "Attachment: ${FILE##*/}" >>  ${NEW}
fi
/usr/bin/echo "." >> ${NEW}
/usr/bin/echo   >> ${NEW}

generate_message_hash

/usr/bin/echo "-----------"
/usr/bin/echo "encrypted message: "
/usr/bin/cat ${MSG}.asc 
/usr/bin/echo "hash of message:   "
/usr/bin/cat ${NEW}.hash 
/usr/bin/echo
/usr/bin/echo "----end----"

RES=$(/usr/bin/curl https://${SERVER}/cgi-bin/safewebdropsave?${RECIPIENT}\&${SENDADDR}\&${REQ}\&${SIG}\&${FILE} 2>/dev/null)
/usr/bin/echo "SERVER -> I:  ${RES} :  ${#RES} bytes received  "
# server has returned the number that is used to store the message

NUM=${RES}
# send the encrypted attachment
/usr/bin/gpg -ca --batch --passphrase ${SEC} ${FILE}
# generate a signature of {NUM, hash(encryptedfile)}
HASH=$(/usr/bin/cat ${FILE}.asc | /usr/bin/sha256sum | /usr/bin/cut -c-64)
MESSAGE=$(/usr/bin/echo -n "${NUM}:${HASH}")
/usr/bin/echo -n $(safewebdrophash ${MESSAGE}) > ${NEW}.hash
./signRSA "${PRIVSECRET}" ${NEW}.hash ${ID}
SIG=$(/usr/bin/base64 --wrap=0 ${NEW}.hash.sig)
REQ=$(/usr/bin/cat ${MESSAGE})
RES=$(/usr/bin/curl https://${SERVER}/cgi-bin/safewebdropfile?${RECIPIENT}\&${SENDADDR}\&${MESSAGE}\&${SIG}\&${NUM} --upload-file ${FILE}.asc)

/usr/bin/echo "SERVER -> II:  ${RES} :  ${#RES} bytes received  "

exit 0