Java in a Nutshell, 5th Edition

Name

MacSpi

Synopsis

This abstract class defines the service-provider interface for Mac. A cryptographic provider must implement a concrete subclass of this class for each MAC algorithm it supports. Applications never need to use or subclass this class.

public abstract class MacSpi {
// Public Constructors
     public MacSpi( );  
// Public Methods Overriding Object
     public Object clone( ) throws CloneNotSupportedException;  
// Protected Instance Methods
     protected abstract byte[ ] engineDoFinal( );  
     protected abstract int engineGetMacLength( );  
     protected abstract void engineInit(java.security.Key key, java.security.spec.
        AlgorithmParameterSpec params) throws java.security.InvalidKeyException, 
        java.security.InvalidAlgorithmParameterException;  
     protected abstract void engineReset( );  
5.0  protected void engineUpdate(java.nio.ByteBuffer input);  
     protected abstract void engineUpdate(byte input);  
     protected abstract void engineUpdate(byte[ ] input, int offset, int len);  
}

Passed To

Mac.Mac( )