Microsoft KB Archive/933907

= FIX: The HttpListenerRequest.GetClientCertificate method may not retrieve the client certificate in a .NET Framework 2.0-based application =

Article ID: 933907

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft .NET Framework 2.0

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SYMPTOMS
When a Microsoft .NET Framework 2.0-based application calls the HttpListenerRequest.GetClientCertificate method, the HttpListenerRequest.GetClientCertificate method may not retrieve the client certificate. This problem occurs if you use the HttpListener class to programmatically control the client certificate request. For example, you can configure the HttpListener class by using the Httpcfg.exe tool. This problem may occur after you run the Httpcfg.exe tool together with the /f option set to zero by using the following command:

httpcfg /f 0



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft .NET Framework 2.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
You must have the Microsoft .NET Framework 2.0 installed to apply this hotfix.

Restart information
You do not have to restart the computer after you apply this hotfix.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.Microsoft .NET Framework 2.0, x64-based versions

Microsoft .NET Framework 2.0, x86-based versions

Microsoft .NET Framework 2.0, Itanium-based versions



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
To programmatically control the request of a client certificate after you apply this hotfix, follow these steps:   Configure the HttpListener class by using the Httpcfg.exe tool. To do this, type the following command at a command prompt, and then press ENTER. httpcfg set ssl /i ApplicationIPandPort /h TheServerCertificateHash /g ApplicationGUID /f 0  Call the HttpListenerRequest.GetClientCertificate method asynchronously.

