[Cryptography-dev] Help required for RSAPrivateKeyWithSerialization

[Paul Kehrer]

Hi Olivier,

The currently released version (0.7.2) does not support saving the keys, but 0.8 (which should be out in the next few days) will support it via "private_bytes" (https://cryptography.io/en/latest/hazmat/primitives/asymmetric/rsa/#cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization.private_bytes). At that point when you call rsa.generate_private_key() you can verify you get back an object with the RSAPrivateKeyWithSerialization interface by calling isinstance(key, rsa.RSAPrivateKeyWithSerialization).


-Paul Kehrer


On March 7, 2015 at 8:59:44 AM, olivier sallou (olivier.sallou at gmail.com) wrote:

Hi,
I followed examples to create an rsa (public/private) key and it works fine.
I do not see however how to "save" my keys for later reuse/exchange.

I see no "export/convertt to bytes" method to save keys in a file.

In documentation, there are references to RSAPrivateKeyWithSerialization but I do not see how to get one from rsa.generate_private_key().

Could you help me?

Thanks

Olivier
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