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You may receive an error message when you access ASP.NET Web pages that have ViewState enabled after you upgrade from ASP.NET 1.1 to ASP.NET 2.0
Article ID: 911722 - View products that this article applies to.
Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/256986/ )Description of the Microsoft Windows registry
After you upgrade from Microsoft ASP.NET 1.1 to Microsoft ASP.NET 2.0, some ASP.NET-based applications may not function correctly. Additionally, when you access ASP.NET Web pages that have ViewState enabled, you may receive the following error message:
[InvalidOperationException: This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.]
System.Security.Cryptography.RijndaelManaged..ctor() +200 System.Web.Configuration.MachineKeySection.ConfigureEncryptionObject() +2088
System.Web.Configuration.MachineKeySection.GetEncodedData(Byte buf, Byte modifier, Int32 start, Int32& length) +88
System.Web.UI.ObjectStateFormatter.Serialize(Object stateGraph) +1320
System.Web.UI.Util.SerializeWithAssert(IStateFormatter formatter, Object stateGraph) +248
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +17240
Version Information: Microsoft .NET Framework Version:2.0.50606.0; ASP.NET Version:2.0.50606.0
This problem occurs when the following conditions are true:
Important These steps may increase your security risk. These steps may also make the computer or the network more vulnerable to attack by malicious users or by malicious software such as viruses. We recommend the process that this article describes to enable programs to operate as they are designed to or to implement specific program capabilities. Before you make these changes, we recommend that you evaluate the risks that are associated with implementing this process in your particular environment. If you decide to implement this process, take any appropriate additional steps to help protect the system. We recommend that you use this process only if you really require this process.
To work around this problem, change the configuration in the application-level Web.config file. Specify that ASP.NET use the Triple Data Encryption Standard (3DES) algorithm to process view state data. To do this, follow these steps:
Steps to reproduce the problemWarning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
Before you can reproduce this problem, you must set the
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\fipsalgorithmpolicyregistry subkey to 1 to enable the FIPS-compliant algorithms policy.
Follow these steps, and then quit Registry Editor:
To reproduce the problem, follow these steps:
For more information about the effects of enabling the "System cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing" security setting in Windows XP and in later versions of Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/811833/ )The effects of enabling the "System cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing" security setting in Windows XP and later versions