Basic but pure DES implementation in PythonI have written it for fun because nothing else.

1. S-des Key Generation Code In C 10
2. S-des Key Generation Code In C B
3. S-des Key Generation Code In C 2
4. S-des Key Generation Code In C 1
5. Free Source Code In C++

How it works ?

Sep 18, 2015  Data Encryption Standard (DES) encrypts blocks of size 64 bit.It was developed by IBM based on the cipher Lucifer under influence of the National Security Agency (NSA).It was a most popular block cipher for most of the last 30 years. By far best studied symmetric algorithm. Nowadays considered insecure due to the small key length of 56 bit.It mainly includes confusion and diffusion.

1. (C) Generate Encryption Key. Discusses symmetric encryption key generation techniques for block encryption algorithms such as AES, Blowfish, and Twofish, or for other algorithms such as ChaCha20.
2. Example C Program: Creating a Key Container and Generating Keys. The following example creates a named key container and adds a signature key pair and an exchange key pair to the container. This example can be run without problem even if the named key container and cryptographic keys already exist.

S-des Key Generation Code In C 10

Everything is made within a class called 'des'. This class can be instanciated once and used to cipher and decipher multiple datas.It also support padding using the PKCS5 specification. (So the data is padding even if it is multiple of 8 to be sure that the last byte il be padding data).The generation of all the keys used is made in the method generatekeys and substitute apply the SBOX permutation.The main method is run which is called by both encrypt and decrypt but in a different mode. This method do basically all the stuff, it loopthrought all the blocks and for each do the 16th rounds. Generate a key for steam uplay.

Be careful: This module implement DES in ECB mode, so you can't make it weaker. I didn't made it to be strong but for fun.

S-des Key Generation Code In C B

How to use it ?

S-des Key Generation Code In C 2

I have not done any interface to take argument in command line so this module can't be used as a script. (feel free to modify it).To use it from python shell or in another module do:

S-des Key Generation Code In C 1

Note: In this exemple no padding is specified so you have to provide a text which is multiple of 8 bytes. The key is cut to 8 bytes if longer.

Free Source Code In C++

To use padding: