Article ID: 973975 - Last Review: October 7, 2011 - Revision: 2.0

FIX: The WCF security stack does not support the SHA-256 hashing algorithm in the .NET Framework 3.5

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INTRODUCTION

In the Microsoft .NET Framework 3.5, the Windows Communication Foundation (WCF) security stack supports the SHA-1 hashing algorithm but does not support the SHA-256 hashing algorithm. This hotfix enables the WCF security stack to support SHA-256 so that service endpoints can support SHA-256 for SOAP messages.
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MORE INFORMATION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

You must have the .NET Framework 3.5 Service Pack 1 (SP1) installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix if no instance of the .NET Framework is being used.

Hotfix replacement information

This hotfix does not replace 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.
For all supported x86-based versions of Windows Vista SP2 and of Windows Server 2008 SP2
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File nameFile versionFile sizeDateTime
Servicemonikersupport.dll3.0.4506.441617,24014-Oct-200908:57
Smdiagnostics.dll3.0.4506.4416110,59214-Oct-200908:57
System.identitymodel.dll3.0.4506.4416430,08014-Oct-200908:56
System.runtime.serialization.dll3.0.4506.4416970,75214-Oct-200908:56
System.servicemodel.dll3.0.4506.44165,935,10414-Oct-200908:57

For all supported x64-based versions of Windows Vista SP2 and of Windows Server 2008 SP2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Servicemonikersupport.dll3.0.4506.441619,28814-Oct-200908:57x64
Smdiagnostics.dll3.0.4506.441694,20814-Oct-200908:57x64
System.identitymodel.dll3.0.4506.4416389,12014-Oct-200908:56x64
System.runtime.serialization.dll3.0.4506.4416847,87214-Oct-200908:56x64
System.servicemodel.dll3.0.4506.44165,271,55214-Oct-200908:57x64

For all supported Itanium-based versions of Windows Server 2008 SP2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Servicemonikersupport.dll3.0.4506.441633,62414-Oct-200908:57IA-64
Smdiagnostics.dll3.0.4506.441694,20814-Oct-200908:57IA-64
System.identitymodel.dll3.0.4506.4416389,12014-Oct-200908:57IA-64
System.runtime.serialization.dll3.0.4506.4416847,87214-Oct-200908:57IA-64
System.servicemodel.dll3.0.4506.44165,271,55214-Oct-200908:57IA-64

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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For more information about the SHA1 class, visit the following Microsoft Developer Network (MSDN) Web site:
http://msdn.microsoft.com/en-us/library/system.security.cryptography.sha1.aspx (http://msdn.microsoft.com/en-us/library/system.security.cryptography.sha1.aspx)
For more information about the SHA256 class, visit the following MSDN Web site:
http://msdn.microsoft.com/en-us/library/system.security.cryptography.sha256.aspx (http://msdn.microsoft.com/en-us/library/system.security.cryptography.sha256.aspx)
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APPLIES TO
  • Microsoft .NET Framework 3.5
  • Microsoft .NET Framework 3.5 Service Pack 1
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Keywords: 
kbexpertiseadvanced kbsurveynew kbqfe KB973975
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