Microsoft KB Archive/899524

= FIX: You may receive a “System.ArgumentNullException: Value cannot be null” error message when you call the SignedXml.ComputeSignature method =

Article ID: 899524

Article Last Modified on 3/23/2007

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APPLIES TO


 * Microsoft Windows Server 2003 Service Pack 1

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SYMPTOMS
When you call the SignedXml.ComputeSignature method to create an XML signature for a Microsoft ASP.NET based application that runs on Microsoft Windows Server 2003 Service Pack 1 (SP1), you may receive an error message that is similar to the following:

System.ArgumentNullException: Value cannot be null.

Parameter name: elem

at System.Security.Cryptography.Xml.SignedXml.GetPropagatedAttributes(XmlElement elem)

at System.Security.Cryptography.Xml.Reference.CalculateHashValue(XmlDocument document, CanonicalXmlNodeList refList)

at System.Security.Cryptography.Xml.SignedXml.BuildDigestedReferences

at System.Security.Cryptography.Xml.SignedXml.ComputeSignature

at SignatureTest.Form1.SignMessage(Boolean blnIncludeBody, String strMessage)



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it 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 1.1 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product 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
To apply this hotfix, you must have the .NET Framework 1.1SP1 installed on your computer.

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 tool in Control Panel.   Date         Time   Version            Size    File name -  12-May-2005  02:35  1.1.4322.2324      77,824  System.security.dll



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, 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

Keywords: kbwinserv2003sp2fix kbtshoot kbfix kbbug kbpubtypekc kbqfe kbhotfixserver KB899524

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