Window CryptoAPI: Can I choose the public exponent when generating an RSA key pair?

Using the Windows CryptoAPI, is there any way to specify which public exponent to use when generating a new key-pair (ie. 3 instead of 65537)?

As a bonus question: how would I access this functionality using .NET RSACryptoServiceP开发者_运维知识库rovider?

EDIT: My guess is that the answer is "No", but I would like to get confirmation.

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No - there we go :) More seriously CryptGenKey The only parameters you can send to CryptGenKey are set in CryptSetKeyParam. You can see from the documentation you can only set a limited number of properties for each key type, and only one for RSA keys.

(Plus, as I'm sure you're aware, small exponents are dangerous anyway)

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I think this answers your second question:

EncryptTo/DecryptTo: Encryption in .NET with CryptoAPI Certificate Stores