We can use the PyCryptodome module to generate RSA keys and encrypt and decrypt data using the generated RSA keys. We can also export the public key and the private key to files and import the keys from the files.

Using the PyCryptodome module, we can generate RSA keys using the following lines of code:

from Crypto.PublicKey import RSA

keypair = RSA.generate(2048)

Here, we are generating 2048-bit RSA keys. The generated keypair will have both the private key and public key components. We can use the keypair.publickey() function to obtain only the public key components from the generated key pair.

from Crypto.PublicKey import RSA

keypair = RSA.generate(2048)
public_key = keypair.publickey()

Now, let’s say we want to export the public key and the private key to two separate files. Please note that the keypair contains the private key components while the public key contains only the public key components. So, if we want to export the private key, we would need to export the keypair.

from Crypto.PublicKey import RSA

def export_private_key(private_key, filename):

    with open(filename, "wb") as file:
        file.write(private_key.exportKey('PEM', 'MyPassphrase'))
        file.close()

def export_public_key(public_key1, filename):

    with open(filename, "wb") as file:
        file.write(public_key1.exportKey('PEM'))
        file.close()

keypair = RSA.generate(2048)
public_key = keypair.publickey()

export_private_key(keypair, 'private_key.pem')
export_public_key(public_key, 'public_key.pem')

Here, we are exporting the keys in ‘PEM’ format. Also, we are using a passphrase while exporting the private key so that no …