Re: Getting digital signature from SSL handshake
From: David Wang [Msft] (someone_at_online.microsoft.com)
Date: 01/31/05
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Date: Mon, 31 Jan 2005 01:46:28 -0800
I do not think your approaches will work.
- The handshake is already done by the time ASP is invoked, so no way to
Request.BinaryRead() it.
- Same goes for .Net HttpListener class. The handshake is already done by
the time ASP.Net is invoked.
Now, ISAPI Extension does have API calls to retrieve the certificate blob of
the request negotiated by IIS, but this data has to be exposed by the
application layer (i.e. ASP/ASP.Net) for their applications to use it. For
example, there are various CERT_ server variables ( documented on MSDN --
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/iissdk/html/21b3be8f-d4ed-4059-8e21-6cba2c253006.asp )
that give fields of the client (and server) certificate in ASP and ASP.Net.
ASP also has Request.ClientCertificate() to retrieve similar sorts of data
from the client certificate..
However, I do not recall anything remotely like "digital signature" in
there.
-- //David IIS http://blogs.msdn.com/David.Wang This posting is provided "AS IS" with no warranties, and confers no rights. // "Eric" <ebo2002fr@VIREZMOICA.yahoo.fr> wrote in message news:uhLujL3BFHA.3416@TK2MSFTNGP09.phx.gbl... > Check the AUTH_USER server variable for the username from the Client Cert. > This can be done in a variety of ways. > > There is no way for you to recognize nor capture the digital signature. > Really should not need to nor be allowed. Thank you for the reply. If we do specific developpment, there are maybe other ways to get this information : - ASP Request object with Request.BinaryRead method - .NET HttpListener Class Regards. Eric
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