https://github.com/oz9un/crypto_basics

I am learning&creating stuffs about cryptography.
https://github.com/oz9un/crypto_basics

crypto cryptography ctf decode encode

Last synced: 3 months ago
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I am learning&creating stuffs about cryptography.

• Host: GitHub
• URL: https://github.com/oz9un/crypto_basics
• Owner: oz9un
• Created: 2020-08-23T16:55:43.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2021-10-12T18:40:32.000Z (about 3 years ago)
• Last Synced: 2024-06-30T09:19:25.372Z (5 months ago)
• Topics: crypto, cryptography, ctf, decode, encode
• Language: Python
• Homepage:
• Size: 15.6 KB
• Stars: 7
• Watchers: 2
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# crypto_basics

> Ozgun Kultekin | 23.08.2020

This repository aims to learn stuff about cryptography. 

This will be updated as the content becomes available

## 1- Make your own base64 encoding with python.

Related writing about it: **https://medium.com/@ozgunkultekin/crypto-basics-understand-create-your-own-base64-encoding-with-python-a1481686a35a**

## 2- Conversion: HEX to Base64 

It was just a little challenge to myself.

**"Converting hex to base64 format without importing anything."**

## 3- Validation: Padding Validation

It checks if padding is valid according to given blocksize and plaintext.

I used this code as a prestep for **AES encryption**. 

## 4- Conversion: PKCS #7 Padding

[PKCS #7](https://en.wikipedia.org/wiki/Padding_(cryptography)#PKCS#5_and_PKCS#7) defines Cryptographic Message Syntax.

This function takes 'block length' as a parameter and applies padding on given plaintext according to block length.