Default_backend not defined in cryptography-RSA (python)

Question

I am getting default_backend is not defined error while using RSA algorithm from hazmat in python 3.5 . Can anyone solve my problem ? The problem occurs while creating private key for rsa algorithm using cryptography module in python.

Did you use module.func or func? If the first you need to have written from module import func else you need the module prefix after using import module can you show us your code, please? — N Chauhan
– N Chauhan, Commented Oct 9, 2018 at 5:48
You must show your code if you want help debugging it. It's one of our rules. — President James K. Polk
– President James K. Polk, Commented Oct 9, 2018 at 13:45

Yilmaz · Accepted Answer · 2020-09-14 07:05:01Z

1

you should have post your code to tell you your mistake. I think you are not passing the default_backend to ec to generate the private key. here is the implementation:

from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.asymmetric import ec

class Wallet:
    def __init__(self):
        
        # SECP=standard efficient cryptography prime. prime is used to genereate the curve
        # that prime number is 256 bit, K=kobler, 1 stands for first
        self.private_key=ec.generate_private_key(ec.SECP256K1(), default_backend())
        self.public_key=self.private_key.public_key()

answered Sep 14, 2020 at 7:05

Yilmaz

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