CryptographicException "Cannot find the requested object."

Question

I want to import a certificate in Silverlight.

If I do this:

X509Certificate cert = new X509Certificate(data, "pwd");

Being data a byte[] get from a OpenFileDialog, I get this error: CryptographicException "Cannot find the requested object."

Stack Trace:

at System.Security.Cryptography.CryptographicException.ThrowCryptographicException(Int32 hr) 
at System.Security.Cryptography.X509Certificates.X509Utils._QueryCertBlobType(Byte[] rawData) 
at System.Security.Cryptography.X509Certificates.X509Certificate.LoadCertificateFromBlob(Byte[] rawData, Object password, X509KeyStorageFlags keyStorageFlags) 
at System.Security.Cryptography.X509Certificates.X509Certificate..ctor(Byte[] rawData, String password)   

The exact same code works in Windows forms.

Any idea of what the problem might be? Regards.

Answer 1

Analyzing the code with Reflector, I see that the problem is raised on this method: 

[MethodImpl(MethodImplOptions.InternalCall)]
internal static extern uint _QueryCertBlobType(byte[] rawData);
 

 I guess that maybe it means that I cant call it from Silverlight, right?.

Do you know another way of creating an instance of X509Certificate from a certificate that the client uploads?

Thanks!

Answer 2

Does anyone know a way of creating an instance of X509Certificate from a certificate that the client uploads?

Answer 3

I've got the same error. The reason is that constructor waits binary certificate (DER formar), not base64 one.