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genKey.py

from cryptography.hazmat.primitives.asymmetric import rsa
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.backends import default_backend 

try:
    private_key = rsa.generate_private_key(
        public_exponent=65537,
        key_size=int(5e3),
        backend=default_backend()
    )
    private_pem = private_key.private_bytes(
        encoding=serialization.Encoding.PEM,
        format=serialization.PrivateFormat.PKCS8,
        encryption_algorithm=serialization.NoEncryption()
    )

    with open('private_key.pem', 'wb') as f:
        f.write(private_pem)

    public_key = private_key.public_key()
    public_pem = public_key.public_bytes(
        encoding=serialization.Encoding.PEM,
        format=serialization.PublicFormat.SubjectPublicKeyInfo
    )
    with open('public_key.pem', 'wb') as f:
        f.write(public_pem)

    print("\nSuccessfully created Public and Private Key\n")

except Exception as e:
    print("\nFailure\n")
    print(e)