Implementation of Data Encryption Standard (DES) in Python 3.8.
Supports Electronic Codebook (ECB) and Cipher Block Chaining (CBC) Block Cipher Modes of Operation.
Run des.py.
usage: des.py [-h] {ecb,cbc} ...
positional arguments:
{ecb,cbc}
ecb use Electronic Codebook (ECB) encryption mode
cbc use Cipher Block Chaining (CBC) encryption mode
optional arguments:
-h, --help show this help message and exit
usage: des.py ecb [-h] (-e | -d) key_file infile outfile
positional arguments:
key_file text file to be used as key for encryption/decryption
infile text file to be used as input for encryption/decryption
outfile text file to be used as output for encryption/decryption
optional arguments:
-h, --help show this help message and exit
-e encrypt
-d decrypt
usage: des.py cbc [-h] (-e | -d) key_file infile outfile iv_file
positional arguments:
key_file text file to be used as key for encryption/decryption
infile text file to be used as input for encryption/decryption
outfile text file to be used as output for encryption/decryption
iv_file text file to be used as IV for encryption/decryption
optional arguments:
-h, --help show this help message and exit
-e encrypt
-d decrypt