design-block-cipher

IES is a block cipher that created based on AES and DES and feistel network. It uses the Sbox from AES and Feistel network from DES.

NIM	Name
13520029	Muhammad Garebaldhie ER Rahman
13520163	Frederik Imanuel Louis
13520166	Raden Rifqi Rahman

How does IES work

Generally IES have 5 components

1. Sbox
2. Pbox
3. Expansion Matrix
4. Round function
5. Key Generation

Requirements

1. Python 3.10
2. virtualenv

How to install

1. Make sure you have all the requirements installed.
2. Create virtualenv by using virtualenv venv
3. Use the virtualenv by using
   1. Windows: ./venv/Scripts/activate
   2. UNIX: source ./venv/bin/activate
4. Install all the requirements using pip3 install -r requirements.txt

How to run

usage: encrypt.py/decrypt [-h] [-M MODE] [-iv initial-vector-file] [-o output-vector-file] filepath key-file-or-phrase

positional arguments:
  filepath
  key-file-or-phrase

optional arguments:
  -h, --help            show this help message and exit
  -M MODE, --mode MODE
  -iv initial-vector-file
  -o initial-vector-file, --outfile initial-vector-file

1. -M mode is consisting of ECB, CBC, CFB, OFB, CTR other than that it will fails
2. -iv path is filepath consisting of the iv the program want to use. The file might be anything .txt, .in or no exstention. The files is consisting bytes or text. iv options will be used for all modes except ECB

This is example of iv file

akusukamakaniyayayaya

3. -o output is the filename that you want to output, the default is it will append encrypted- to the filename so if the filename is a.txt the result will be encrypted-a.txt
4. filepath file you want to encrypt or decrpyt
5. key-file-or-phrase the key that will be used for the process, might be phrase or from file

Example:

1. Encrypt file named requirements.txt using ECB mode with key from stdin

python .\src\encrypt.py  -M ecb .\requirements.txt akusukakripto

2. Encrypt file named requirements.txt using CBC mode and iv file with key from stdin

python .\src\encrypt.py -M cbc -iv .\iv .\requirements.txt akusukakripto

3. Decrypt file named requirements.txt using CBC mode and iv file with key from a file

python .\src\decrypt.py -M cbc -iv .\iv .\encrypted-requirements.txt .\a

4. Decrypt file named requirements.txt using CBC mode and iv file with key from a file with file name gare

python .\src\decrypt.py -M cbc -iv .\iv -o .\gare .\encrypted-requirements.txt .\a