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use of certificates issued by Windows 2008 R2. NET Framework Presentation

If they are lucky to have licenses to use a template from v3 Windows Vista or higher, and the same were issued by a Windows Server 2008 R2 is find a happy exception ( Invalid provider type specified. ) trying to get PrivateKey property of an instance of X509Certificate.

This occurs, as well explained in this post due to how Windows Vista and Seven store this type of certificate - using Microsoft Software Key Storage Provider - is only supported by CryptoAPI , but not for the libraries provided by . NET Framework 4.0 or earlier.

The way around this is using the libraries provided by the friends of the CLR Security Team :

• Include " using Security.Cryptography.X509Certificates; "in the file that used to bring certificates to the class extension Methods X509Certificate2
  
• Ask for HasCngKey () in X509Certificate2 instance to see if the key is stored in this way. If so, create a new instance of RSACng using the method GetCngPrivateKey () as a parameter.
  

Until next

Zaiden