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SignedXml CheckSignature CryptographicException

Gene Vangampelaere
Posts: n/a

I'm having a problem with the RSACryptoServiceProvider and the
SignedXml.CheckSignature() method. When I use the function locally (ASP.NET
webservice) it works fine. When I put it on a server then I get this error :

System.Security.Cryptography.CryptographicExceptio n: CryptoAPI cryptographic
service provider (CSP) for this implementation could not be acquired.

Public Function CheckXmlSignature(ByVal xmlstring As String, Optional ByVal
isFile As Boolean = True) As Boolean
Dim bresult As Boolean
Dim xmlDoc As New XmlDocument
If isFile Then
End If
Dim sXml As New SignedXml(xmlDoc)
Dim dsig As XmlNode = xmlDoc.GetElementsByTagName("Signature")(0)
Dim a As String = dsig.InnerText()
sXml.LoadXml(CType(dsig, XmlElement))
Catch ex As Exception
Throw ex
End Try
'Verify the signature.
bresult = sXml.CheckSignature()
Return bresult
Catch ex As Exception
Throw ex
End Try
End Function

Does anyone have any idea what is wrong ? I searched google and the
following urls did NOT solve the thing :;en-us;Q322371

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