Steps to execute program:

1. To compile project run following command: make
2. Sample input.txt and output.txt are given. Change input.txt to do encryption/decryption as required. Format for input file:

Encryption plaintext: .. .. .. .. userkey: .. .. .. ..

or

Decryption ciphertext: .. .. .. .. userkey: .. .. .. .. ..

3. To execute program run either one of following command make run or java -cp p1-npatil5.jar RC6 input.txt output.txt