_ _ __ _ | \ |_ (_ / _. | _ | _. _|_ _ ._ |_/ |_ __) \_ (_| | (_ |_| | (_| |_ (_) | ---------------- DES Calculator : ---------------- introduction : DES Calculator is a program to encrypt and decrypt a plaintext over DES encryption algorithm , DES Calculator is mainly for educational purposes to calculate DES functions in each round in a binary form and then convert it to HEX form. ------ Note : ------ DES Calculator in only work under python3 Here is an example of one round : ================================================================================ ========== Round 10 ========== Expanded Right [1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1] Round Key [0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1] XOR result [1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0] F Function output [0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0] Output of permutation function [1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1] New Right [1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1] New Left [1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1] ================================================================================ How To Use : To run DES Calculator (encryption algorithm) a- Via python3 interpreter python3 des-encryption.py b- Via normal CLI 1- chmod u+x des-encryption.py 2- ./des-encryption.py To run DES Calculator (decryption algorithm) a- Via python3 interpreter python3 des-decryption.py b- Via normal CLI 1- chmod u+x des-decryption.py 2- ./des-decryption.py Copyright : DES Calculator is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. DES Calculator is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with DES Calculator. If not, see <http://www.gnu.org/licenses/>.
Hamza-Megahed/des-calculator
DES-Calculator is to encrypt and decrypt over DES algorithm and give full details in each round, DES-Calculator works only under python3
PythonGPL-3.0