Covert Channel

This project has been implemented as part of Cryptography signature in the Factultad de Ingeniería de la Universidad de Buenos Aires.

Compilation

In order to compile the project, it is provided a CMake. User must run the following commands from the root folder:

mkdir build
cd build
cmake ..
make

Execution

Once the project is compiled, there are two modes to run the program: as a sender, and as a receiver. Both of those modes need to run with root permissions, since it works with raw sockets.

• To run the program as a sender, user must pass a dummy file name to send in the body of the udp messages. The actual message will be sent as part of the UDP header.
• To run the program as a receiver, user must not pass any parameter to the executable.

Since the build folder:

# As sender
sudo ./bin/covertudp ../test/lorem_ipsum.txt

# As receiver
sudo ./bin/covertudp

The standard input of the sender should be written in the standard output of the receiver.