How to use client certificate private key from httprequest.clientcertificate

[LlibreDev]

I have web site setup with client certificate for user authentication
mapping the client certificate to an existing NT user account.
I would like to use the web user client certificate private key from the
request object to decrypt information that has been encrypted using that
same user's client certificate public key. How can I use the private key
off the request object?

[Alun Jones [MS MVP]]

In article <WTiWb.8372$rv1.5824089@news4.srv.hcvlny.cv.net> , "LlibreDev"
<LlibreDev@optonline.net> wrote:

>I have web site setup with client certificate for user authentication
>mapping the client certificate to an existing NT user account.
>I would like to use the web user client certificate private key from the
>request object to decrypt information that has been encrypted using that
>same user's client certificate public key. How can I use the private key
>off the request object?

You don't. The client hasn't sent you the private key of his certificate -
in fact, it would be quite a security violation for him to do so. It's his
_private_ key, so it stays under his control, on his client computer.

Alun.
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