method Decipher.prototype.final
Decipher.prototype.final(): BufferDeprecated
Once the decipher.final() method has been called, the Decipher object can
no longer be used to decrypt data. Attempts to call decipher.final() more
than once will result in an error being thrown.
BufferAny remaining deciphered contents. If outputEncoding is specified, a string is returned. If an outputEncoding is not provided, a Buffer is returned.