DES Algorithm

C++ Implementation of DES algorithm.

Installation

Clone the repository and inside the folder run the following commands:

mkdir build
cd build
cmake ..
make

It will build the project and create a binary file named "des" inside the build/bin folder.

Now, run the file using

./bin/des

Usage

The implementation is in ECB mode and uses PKCS#7 for padding.

The script allows encryption and decryption using a 8-byte key for both text (in hex) and binary files.

1. For Text based

   • Enter text to be encrypted/decrypted (in hex) and key (in hex).

2. For File based (a binary file)

   • Enter input file location, output file location and key (in hex).
   • The script will encrypt the input file in binary file and decrypt it in original form.