SH Crypt

A simple symetric encyption decryption algorithm

About

SH Crypt is base on library cryptography algorithm and use more specifically the Electronic Code Book (ECB) for symetric encryption and decryption.

Here are some code example to use the library.

Generate a key, encrypt and decrypt text

from sh_crypt import GenKeySH, SymCryptSH, AsymCryptSH
import random as rnd

###############################
## Symetric Cipher

# Create key generator
seed = rnd.randint(1, 1e12)
key_gen = GenKeySH(seed)

key = key_gen.gen_sym_key(path_store="mykey.txt")
# Ex : 'e169344ae15719669ed2fecea1ac4773'

password = "Hello World !!"

crypt = CryptSH(key)

encrypt_password = crypt.encrypt_message(password)
# Ex : '469feb93adc2af609a98e6b7cee859bb'

crypt.decrypt_message(encrypt_password)
# 'Hello World !!'

###############################
## Asymetric Cipher

key_gen = GenKeySH()

priv_key, public_key = key_gen.gen_asym_key()
# We can store the key with parameters path_store="file_path".

crypt = AsymCryptSH()

crypt.add_key(priv_key)
crypt.add_key(public_key)

message = "Hello World !!!"

# Encrypt / Decrypt Message
message_enc = crypt.encrypt_message(message)

crypt.decrypt_message(message_enc)

# Sign message / check signature

signature = crypt.sign_message(message)

if crypt.check_sign_message(signature, message):
    print("Signature is valid")
else:
    print("Signature is invalid")

As you can see in the example, you can store your generated key in a text file and reuse it later, with the path_store argument.

Install

You can install sh-crypt with pip:

pip install sh-crypt

or download the sh-crypt source, choose your version, and install with the command:

python setup.py install