Override javax.crypto.Cipher.toString()

Summary

Override javax.crypto.Cipher.toString() to provide a user friendly string describing the Cipher

Problem

Current output inherits Object.toString and is not too informative

Solution

Override toString() in Cipher class

Specification

/**
 * Returns a String representation of this Cipher.
 *
 * @implNote
 * This implementation returns a String containing the transformation,
 * mode, and provider of this Cipher.
 * The exact format of the String is unspecified and is subject to change.
 *
 * @return a String describing this Cipher
 */