Cannot export generated certificate with a private key to byte array in .NET 4.0/4.5

Question

I need to export and import generated certificates with private keys to and from byte arrays, and I don\'t have any problems unless I use .NET framework 4.0 and 4.5. I\'m ge

Answer 1

I haven't noticed that CspKeyContainerInfo.CspParameters.KeyContainerName is empty after key creation in .NET 4.0 and .NET 4.5, but it was autogenerated in .NET 3.5. I've set a unique name for container and now I'm able to export the private key.

public static AsymmetricAlgorithm ToDotNetKey(RsaPrivateCrtKeyParameters privateKey)
{
    var cspParams = new CspParameters
    {
          KeyContainerName = Guid.NewGuid().ToString(),
          KeyNumber = (int)KeyNumber.Exchange,
          Flags = CspProviderFlags.UseMachineKeyStore
    };

    var rsaProvider = new RSACryptoServiceProvider(cspParams);
    // ...