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Verification of signature "revocation server was offline"

Posted By: Posted Date: September 02, 2010 Points: 0 Category :.NET Framework

Hi, I have to verify a (detached) signature from a third party. I am using System.Security.Cryptography.Pkcs.SignedCMS (VS2008) to validate the Signature. The verification of the data works fine. But when I try to verify the used certificates I always get that the intermediate certificate is not valid. The ChainStatus returns RevocationStatusUnknown (UnknownError) and OfflineRevocation (UnknownError) even if I set the RevocationMode to NoCheck on the chain. Dim byteData() As Byte = IO.File.ReadAllBytes(DataFile.FullName) Dim byteSignature() As Byte = IO.File.ReadAllBytes(SignatureFile.FullName) Dim ciData As New Pkcs.ContentInfo(New Oid("data"), byteData) Dim Verifier As New Pkcs.SignedCms(ciData, True) Try Verifier.Decode(byteSignature) Verifier.CheckSignature(True) Catch crex As CryptographicException ' Signature is not valid Catch ex As Exception ' Verification failed End Try For Each SignatureCertificate As X509Certificates.X509Certificate2 In Verifier.Certificates Dim certChain As New X509Certificates.X509Chain(True) certChain.Build(SignatureCertificate) ' Build the certificate chain from the signers certificate certChain.ChainPolicy.RevocationMode = X509Certificates.X509RevocationMode.NoCheck For Each certElement As X509Certificates.X509ChainElement In certChain.ChainElements If Not certElement.Certificate.Verify() Then ' Cert

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Problem signature with Other Framework

My Application build in .net framework 3.5.

when I am trying to run it into a server 2008 system, The following error comes

Description:
  Stopped working

Problem signature:
  Problem Event Name: CLR20r3
  Problem Signature 01: MyApp.exe
  Problem Signature 02: 6.0.1.172
  Problem Signature 03: 4c6fc832
  Problem Signature 04: FusionRetail
  Problem Signature 05: 6.0.1.172
  Problem Signature 06: 4c6fc832
  Problem Signature 07: 7f
  Problem Signature 08: c6
  Problem Signature 09: System.InvalidOperationException
  OS Version: 6.0.6002.2.2.0.16.7
  Locale ID: 1033

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I uninstall the existing framework and then again install framework 3.5. but the problem still remaining.

What's the acrual problem ?

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1. I log into Windows Live.

2. I go to http://technet.microsoft.com/en-us/evalcenter/ee388573.aspx

3. I make a selection in "Select a version to download", such as "SharePoint server for internet sites, Standard".

4. I click on the "Get Started Now" button

At this point a redirect takes me to the page with heading "Verify Ownership of your E-mail Address." But I have already verified this, otherwise I couldn't log in to Windows Live, right?


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