Returns the parameters used with this signature object.
The returnedIf this signature has been previously initialized with parameters may be(by calling the setParameter
method), this method returns the same that were used to initializeparameters. If this signature , orhas not been initialized with parameters, this method may containreturn a combination of default and randomly generated parameter values used byif the underlying signature implementation if this signature requires algorithm parameters but was not initialized with anysupports it and can successfully generate them. Otherwise, null
is returned.