Retrieves the key from the current item; creates a shallow copy.

returns false if client should be closed, otherwise true

* Encrypt |len| bytes of binary data in |plaintext|, stores the * encrypted data in |ciphertext|. * * The input data length must be aligned t

Returns true if the public key and an internal key are equal

Erases a Database item @see Database#erase(Transaction, byte[])

Erases the current key <p> This method wraps the native ups_cursor_erase function. <p> Erases a key from the Database. If the erase was successfull, t