How To Send Encrypted Message With ICMP (ping) Protocol.

The Advanced Example of The Shell Script Dialog with Python3

How does it Work

This app send messages in the boby of the ICMP packeges echo-resquest and echo-replay.

This messages can be send in clear text or cryptografed with SHA256.

How to Install it

The Basics packages and the App need to be Installed in the both servers (Sender and receiver)

sudo apt install dialog
sudo apt install zip

# You need install python 3.10
# Try somethin like this
    sudo add-apt-repository ppa:deadsnakes/ppa
    sudo apt update
    sudo apt install python3.10 -y # You can install latest version
    python3 --version

# You need install pip
    sudo apt install python3-pip

# You need install python Scapy library 
# The installation guite is avaliable in: htts://www.scapy.net
# If python was instaled before, Tray something like this
    sudo pip install --pre scapy[complete]

# You need install Crypt.Cyper python libre
#Try something lik this
    sudo pip install pycryptodome==3.4.3
    #obs.: If you install the version 3.16.0 will be have problems

Download the files and extract it

wget https://github.com/KeystoneDevBr/encrypted-ping/archive/refs/heads/main.zip

unzip main.zip 

mv encrypted-ping-main/ ./encrypted-ping/

Change file permissions

#Grant executable permission
sudo chmod 775 -R ./encrypted-ping/

#Check the app files
cd ./encrypted-ping/

#Show files
ls -1 ./encrypted-ping/

# You need see something like this:
# ./encrypted-ping/ 
#            README.md
#            f_information.sh
#            f_seng_ping.sh
#            f_sniff_ping.sh
#            icmp-receive.py
#            icmp-send.py
#           imags
#            index.sh

Check python files (sender and receiver files)

The files icmp-send.py and icmp-receive.py are reponsible for sending and receiving messages.

Step 1: Try send and receive clear messages

Star the sniffer in the receiver server (192.168.30.5)

# Execute the sniffer in backgroud until the first package received
sudo python3 ./encrypted-ping/icmp-receive.py  -c n -a 192.168.30.1 

Send message in the sender server (19.168.30.1)

sudo python3 ./encrypted-ping/icmp-send.py -c n -a 192.168.30.5 -m "Clear Message to Send" -q 4

Step 2: Try send an receive crypted messages

Star the sniffer in the receiver server (192.168.30.5)

sudo python3 ./encrypted-ping/icmp-receive.py  -c y -k "key" -a 192.168.30.1

Send message in the sender server (19.168.30.1)

sudo python3 ./encrypted-ping/icmp-send.py -cy -k "key" -a 192.168.30.5 -m "Crypted Message to Send" -q 4

Start the APP

cd ./encrypted-ping/

# Execute this app insite the folter ./encrypted-ping/
sudo index.sh