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Friday, September 15, 2017

Working with public/private certificates using Python

If you need to sign a message using the public/private key technology, Python is your best friend.

Here is in few lines the creation of public/private keys, a sign of a message using a private key and the check using the public key.

First of all install pycryptodomex library using pip.

Next here is the code:

from Cryptodome.PublicKey import RSA
from Cryptodome.Signature import PKCS1_v1_5
from Cryptodome.Hash import SHA256

privatekey = RSA.generate(1024)
privatesigner = 
publicsigner = 
message = b'Python rocks!'
private_message_sign = privatesigner.sign(