ES256 not supported?

Hey guys!

For some reason I’m no longer able to get ES256 to work, but it was working for me earlier.

Here’s the code:

import jwt, ecdsa

signing_pem = ecdsa.SigningKey.generate().to_pem()
payload = {"some": "example"}
signed_token = jwt.encode(payload, signing_pem, algorithm='ES256')

And it yields the following error:

raise NotImplementedError(‘Algorithm not supported’)

(for reference, I have version 1.1.0 installed)

Was support for ES256 discontinued? Am I doing something wrong?

Thanks!

[dukedougal]

It would be good if the error suggested that the problem might be that “cryptography” is now needed instead of PyCrypto.

[mark-adams]

Previously, PyCrypto was required for RSA and ecdsa was required for EC algorithms. Back in December, we switched to using cryptography instead of those libraries because it provided both sets of algorithms (RSA and EC) in a single library and also had better performance.

Please make sure you have installed cryptography by running pip install cryptography and you should be also set. (You also can safely uninstall ecdsa as well). Let me know if that doesn’t get you fixed up.