public bool Delete()
{
try
{
// if a rsaprovider exists, make non persistent, clear it and nullify --> the key is deleted
if (RsaProvider.IsAssigned())
{
// Delete the key entry in the container.
RsaProvider.PersistKeyInCsp = false;
// Call Clear to release resources and delete the key from the container.
RsaProvider.Clear();
RsaProvider = null;
return(true);
}
return(false);
}
catch (CryptographicException e)
{
Debug.WriteLine("Encryption: UtilHelper.DeleteKeyFromContainer(...) unable to delete key - " + e.Message);
return(false);
}
}
protected virtual void Dispose(bool disposing)
{
if (!_disposed)
{
if (RsaProvider.IsAssigned())
{
RsaProvider.Clear(); // resources vrijgeven.
RsaProvider = null;
}
}
_disposed = true;
}
private void GetKeyContainer(string containerName)
{
// - if this is a clientsize Encryption determine maximum keysize
// - get the serviceprovider
// - if the serviceprovider allready exists, with the wrong keysize, delete the serviceprovider
// - get a new serviceprovider if deleted
// - if the Encryption is temporary, make sure it is not persistend
try
{
var cp = GetCspParameters(containerName);
if (!RsaProvider.IsAssigned())
{
try
{
RsaProvider = new RSACryptoServiceProvider(_maxBytesServer * 8, cp);
}
catch (CryptographicException e)
{
if (RsaProvider.IsAssigned())
{
Delete();
}
throw new Exception("create: " + e.Message, e);
}
}
if (_maxBytesServer > 0 && RsaProvider.KeySize != _maxBytesServer * 8)
{
try
{
try
{
Delete();
}
catch (CryptographicException e)
{
{
throw new Exception("delete: " + e.Message, e);
}
}
if (!RsaProvider.IsAssigned())
{
RsaProvider = new RSACryptoServiceProvider(_maxBytesServer * 8, cp);
}
}
catch (CryptographicException e)
{
{
throw new Exception("replace: " + e.Message, e);
}
}
}
}
catch (CryptographicException e)
{
Debug.WriteLine("Encryption: Utilhelper.GetKeyContainer(...) unexpected exception - " + e.Message);
throw new Exception("most outer: " + e.Message, e);
}
}
