X.509 certificates and RSA encryption

From: Mikael Engdahl ([myfirstname)
Date: 01/23/04 

Date: Fri, 23 Jan 2004 11:51:24 +0100

Q1:

I have a certificate file (.cer) that I'm able to load into a
X509Certificate object using the X509Certificate.CreateFromCertFile method.

Now I want to use the public key from the certificate to do some RSA
encrypting. I can get the key from the certificate as a byte array by using
the GetPublicKey method, but I can't find any way of supplying the key to
the RSACryptoServiceProvider object. How do I do this?

Q2:

The same as above, but another certificate (mine), and this time I want to
use the private key (for signing). But I can't even find I way of getting
the private key out of the cert (there is no GetPrivateKey method).

Is the private key even in the certificate?

Mikael Engdahl

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