Cryptography-Spring2019 Project 2 AES and DES

Group Members:

• Nathan S
• Stephen S
• Jasper C
• Allen S
• Hector M

Programming Language: Java

How to Execute:

This project builds upon the existing testing frameworks and cipher interfaces used in project 1.

1. Clone the project if you don't have it yet.

   https://github.com/Nathan-LS/Cryptography-Spring2019.git
   

2. Make the gradle wrapper file executable.

   cd Cryptography-Spring2019
   chmod +x ./gradlew
   

3. Compile and run the application with arguments as specified in the project assignment details. Format:

   ./gradlew run --args=<CIPHER NAME> <KEY> <ENC/DEC> <INPUT FILE> <OUTPUT FILE>
   

   For example:

   ./gradlew run --args="DES 0123456789abcedf ENC src/test/resources/DES/0123456789abcedf/plaintext_image_tux.png encrypted_tux.png"
   

   This will compile the Java application and encrypt a picture of Tux to the encrypted_tux.png file.
4. Let's decrypt the image of Tux and ensure it matches the plain original.

   ./gradlew run --args="DES 0123456789abcedf DEC encrypted_tux.png decrypted_tux.png"
   sha256sum decrypted_tux.png src/test/resources/DES/0123456789abcedf/plaintext_image_tux.png
   

Notes on testing

This application is fully unit tested with JUnit and runs with continuous integration services. Files exist in the /src/test/resources/ folder based on encryption key and cipher type. For example, the file src/test/resources/DES/0123456789abcedf/plaintext_1.txt will have a corresponding assert file named src/test/resources/DES/0123456789abcedf/encrypted_1.txt which are used for decryption and encryption testing. You should run all of our unit tests with the following command:

./gradlew test

Path format:

src/test/resources/CIPHER/KEY/plaintext_CASE.txt

Extra Credit Implementation:

Not attempted.

Project Notes:

• None