Capture CAC ID

Hello Experts currently our website requires CAC or PKI to get to login screen.  Is there anyway to capture CAC Id's as users login?  Rather than having 1500 users send us their CAC Id's & manually tied to their account?
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Is this for IIS?
ManieyaK_CSSPAuthor Commented:
So client certificate authentication of any kind happens on a different layer than the programming language. Basically, the web server is the one that handles the prompting of the client for the certificate and handling of the subsequent processing.

Since you're using IIS, I'd suggest you check out Microsoft's Technet article on how to add client cert authentication/mapping to IIS:

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Usually the subject name of the client certificate is also made available to the programming language via environment/server variables.
ManieyaK_CSSPAuthor Commented:
Thanks guys, I think the Technet article is what we were looking for.  Thank you both.
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