import java.io.InputStream
import java.io.OutputStream
import java.security.InvalidKeyException
import java.security.KeyStore
import java.util.Base64
import javax.crypto.CipherInputStream
import javax.crypto.CipherOutputStream
import javax.crypto.KeyGenerator
import javax.crypto.SecretKey
import javax.crypto.spec.SecretKeySpec


/**
 * Provides access to configuration parameters to control encryption.
 */
internal