python – Generating RSA key pairs with pycryptodome module

Thank you for the creator of pycryptodome module, this module has made RSA key pair easy.

This recipe presents a function for generating private and public key pair.

from Crypto.PublicKey import RSA  # pycryptodome


def rsa_key_gen(bits=2048, privatekey_path=RSA_PRIVATE_KEY, pubkey_path=RSA_PUBLIC_KEY):
    private_key = RSA.generate(bits)
    with open(privatekey_path, "wb") as privkey_file:
        privkey_file.write(private_key.export_key())
    with open(pubkey_path, "wb") as pubkey_file:
        pubkey_file.write(private_key.publickey().export_key())

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