ASPX Pages Fail Due To FIPS 140 Security Policy?
Mar 18, 2011
I am working on a government site and am having some problems with my local security policy interferring with my web application. There is a setting called "System cryptography: Use FIPS 140 compliant cryptographic algorithms, including encryption, hashing and signing algorithms" which is enabled on my server.
Since that has been enabled, most of my aspx pages are returning the error "This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms." These pages aren't accessing any cryptographic methods. They do communicate with another database server, but that's it.
My problem is similar to the one described here. However, I don't have the option of disabling this FIPS security setting.
I am using .NET 4.0, IIS 7.0, and Windows Server 2008 R2, if that matters. Has anyone encountered this problem before?
Update
Unfortunately, correcting the machine key element to use a FIPS compliant algorithm did not completely solve my problem. I am still getting the error on alot of my pages.
I found two hotfixes which may be related. I will try to install these and see what happens.
SQL Server Reporting Services R2 hotfix ScriptManager Control hotfix
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Feb 19, 2010
If you enable the "Use FIPS compliant algorithms for encryption, hashing, and signing" security policy option in Windows, attempting to use many of the cryptographic classes in the .NET Framework will result in an InvalidOperationException. By default, ASP.NET uses AES to encrypt the ViewState blob, so it fails. You can work around this by adding a key like this to web.config:
<machineKey validationKey="AutoGenerate,IsolateApps" decryptionKey="AutoGenerate,IsolateApps" validation="3DES" decryption="3DES"/>
And that covers you for basic ASP.NET use. My problem is this: I have a large, complex ASP.NET web applications that makes heavy use of ScriptManagers (the foundation of ASP.NET AJAX) and needs to be deployed by a government customer who must enable this FIPS policy setting. Any ASP.NET page with a ScriptManager on it throws this exception:
[InvalidOperationException: This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.]
System.Security.Cryptography.SHA1Managed..ctor() +3607454
System.Security.Policy.Hash.get_SHA1() +45
System.Web.Handlers.ScriptResourceHandler.GetAssemblyInfoInternal(Assembly assembly) +85
System.Web.Handlers.ScriptResourceHandler.GetAssemblyInfo(Assembly assembly) +99
System.Web.Handlers.RuntimeScriptResourceHandler.GetScriptResourceUrlImpl(List`1 assemblyResourceLists, Boolean zip, Boolean notifyScriptLoaded) +525
System.Web.Handlers.RuntimeScriptResourceHandler.System.Web.Handlers.IScriptResourceHandler.GetScriptResourceUrl(List`1 assemblyResourceLists, Boolean zip, Boolean notifyScriptLoaded) +910
System.Web.Handlers.RuntimeScriptResourceHandler.System.Web.Handlers.IScriptResourceHandler.GetScriptResourceUrl(Assembly assembly, String resourceName, CultureInfo culture, Boolean zip, Boolean notifyScriptLoaded) +193
System.Web.UI.ScriptReference.GetUrlFromName(ScriptManager scriptManager, IControl scriptManagerControl, Boolean zip) +306
System.Web.UI.ScriptManager.RegisterUniqueScripts(List`1 uniqueScripts) +169
System.Web.UI.ScriptManager.RegisterScripts() +407
System.Web.UI.ScriptManager.OnPagePreRenderComplete(Object sender, EventArgs e) +200
System.Web.UI.Page.OnPreRenderComplete(EventArgs e) +11041982
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3672
Even adding the <enforceFIPSPolicy enabled="false"/> element to web.config does not resolve the exception.
Is there any way to configure ASP.NET such that ScriptManager can be used with the Windows FIPS security policy?
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Error:
Security Exception
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screen shot -
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