tinomuzambi / bouncycastles

Using the BouncyCastles API to perform cryptographic operations

NIS Practical

This repository is the source documents for the NIS 2022 Practical. Implementing a client server communication protocol that implements end-to-end encryption using the BouncyCastlesFips library.

Files

The following Java class files can be found under the src directory:

Class	Description
Utils	Utils for running the client server setup.
KeyWithMessageDigest	A class for wrapping a signed one time key with a signed message digest.
Hashing	A class for testing the hashing and signing flow.
Encryption	A class for testing the encryption flow.
HashingAndEncryption	A class for testing the full flow including hashing, signing and encryption methods.
ClientHandler	This class helps the server keep track of all connected clients.
Client	This class represents the client in a client-server network.
ClientRunner	Creates a key pair for a Client then runs a new instance of a Client passing in the key pair encoded.
Server	This class represents the server in a client-server network.

Compiling and Running

There is a Makefile in the root of the repository to make running the client-server network easy. In order to setup a network you can run the following commands in separate terminals:

make
make server
make client
make client

Docs

Javadocs can also be generated by running make docs. This will generate documentation in the doc directory. Opening the index.html file will open a webpage with documentation for all the classes in the repository.

Usage

Once the server is running, each new client will request a name. Once the name is granted, the client is connected and can send/receive messages from the group.

Authors

• Sihle Calana - CLNSIH001
• Simangaliso Mncwango - MNCSIM006
• Tinotenda Muzambi - MZMTIN002
• Tumo Masire - MSRTUM001