open fun getKeyFor(label: String): Key? (source)
Retrieves the SecretKey for the given label.
This method queries for a SecretKey with the given label and no passphrase.
Subclasses override this method if additional properties are needed to retrieve the key.
InvalidKeyException - If there is a Key but it is not a SecretKey
NoSuchAlgorithmException - If the recovery algorithm is not supported
UnrecoverableKeyException - If the key could not be recovered for some reason
Return
The key for the given label, or null if not present