Microsoft KB Archive/937780

= FIX: Error message when you use a smart card CSP together with the &quot;RSACryptoServiceProvider.SignData&quot; method in the .NET Framework 2.0 =

Article ID: 937780

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft .NET Framework 2.0

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SYMPTOMS
When you use a smart card Cryptographic Service Provider (CSP) together with the RSACryptoServiceProvider.SignData method in the Microsoft .NET Framework 2.0, you may receive the following error message:

CryptographicException thrown in SignData method when using certificate object with private key stored on a smart card. Exception message: &quot;Hash not valid for use in specified state&quot; Exception error code: 0x8009000C

This problem occurs if the CSP encapsulates the Microsoft Enhanced CSP to support the smart card. For example, if you use the Schlumberger CSP that is included in Microsoft Windows XP Service Pack 2 together with the RSACryptoServiceProvider.SignData method, this problem occurs.



CAUSE
This problem occurs because of a conflict between the CSP and the .NET Framework 2.0 that occurs when the size of the CSP-generated hash is being verified.



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 .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 .NET Framework 2.0 installed to apply this hotfix.

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

Hotfix replacement information
This hotfix does not replace any other hotfixes.

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.

The .NET Framework 2.0, Itanium architecture 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
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Keywords: kbfix kbqfe kbpubtypekc kbexpertiseadvanced kbhotfixserver KB937780

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