[Cryptography-dev] ECPrivateKey form private_value

[Paul Kehrer]

Hi Dario,

The creation of an EllipticCurvePrivateNumbers object does require you to do d*G yourself at this time. There is some precedent for us adding functions to compute other elements (see: https://cryptography.io/en/latest/hazmat/primitives/asymmetric/rsa/#handling-partial-rsa-private-keys) so a function to do this makes sense to me.

-Paul

On May 14, 2015 at 3:21:29 AM, Dario Sneidermanis (dariosn at gmail.com) wrote:

Hi,

I'm trying to compute an EllipticCurvePrivateKey from a private_value (d). It seems that the only way to achieve this is to create an EllipticCurvePrivateNumbers object, but the constructor takes both the private_value and the public_numbers.

Why does it need the public_numbers, when it could compute them (knowing the curve), by doing d*G (G being the curve generator)?

Is there any way to go from d to the ECPrivKey without doing d*G by myself?

Thanks,
Dario
_______________________________________________  
Cryptography-dev mailing list  
Cryptography-dev at python.org  
https://mail.python.org/mailman/listinfo/cryptography-dev  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/cryptography-dev/attachments/20150514/b0df7819/attachment.html>