This abstract class defines the service-provider interface for Cipher . A cryptographic provider must implement a concrete subclass of this class for each encryption algorithm it supports. A provider can implement a separate class for each combination of algorithm, mode, and padding scheme it supports or implement more general classes and leave the mode and/or padding scheme to be specified in calls to engineSetMode( ) and engineSetPadding( ) . Applications never need to use or subclass this class. public abstract class CipherSpi { // Public Constructors public CipherSpi ( ); // Protected Instance Methods 5.0 protected int engineDoFinal (java.nio.ByteBuffer input , java.nio.ByteBuffer output ) throws ShortBufferException, IllegalBlockSizeException, BadPaddingException; protected abstract byte[ ] engineDoFinal (byte[ ] input , int inputOffset , int inputLen ) throws IllegalBlockSizeException, BadPaddingException; protected abstract int engineDoFinal (byte[ ] input , int inputOffset , int inputLen , byte[ ] output , int outputOffset ) throws ShortBufferException, IllegalBlockSizeException, BadPaddingException; protected abstract int engineGetBlockSize ( ); protected abstract byte[ ] engineGetIV ( ); protected int engineGetKeySize (java.security.Key key ) throws java.security.InvalidKeyException; protected abstract int engineGetOutputSize (int inputLen ); protected abstract java.security.AlgorithmParameters engineGetParameters ( ); protected abstract void engineInit (int opmode , java.security.Key key , java.security.SecureRandom random ) throws java.security.InvalidKeyException; protected abstract void engineInit (int opmode , java.security.Key key , java.security.AlgorithmParameters params , java.security.SecureRandom random ) throws java.security.InvalidKeyException, java.security.InvalidAlgorithmParameterException; protected abstract void engineInit (int opmode , java.security.Key key , java.security.spec.AlgorithmParameterSpec params , java.security.SecureRandom rando m ) throws java.security.InvalidKeyException, java.security.InvalidAlgorithmParameterException; protected abstract void engineSetMode (String mode ) throws java.security.NoSuchAlgorithmException; protected abstract void engineSetPadding (String padding ) throws NoSuchPaddingException; protected java.security.Key engineUnwrap (byte[ ] wrappedKey , String wrappedKeyAlgorithm , int wrappedKeyType ) throws java.security.InvalidKeyException, java.security.NoSuchAlgorithmException; 5.0 protected int engineUpdate (java.nio.ByteBuffer input , java.nio.ByteBuffer output ) throws ShortBufferException; protected abstract byte[ ] engineUpdate (byte[ ] input , int inputOffset , int inputLen ); protected abstract int engineUpdate (byte[ ] input , int inputOffset , int inputLen , byte[ ] output , int outputOffset ) throws ShortBufferException; protected byte[ ] engineWrap (java.security.Key key ) throws IllegalBlockSizeException, java.security.InvalidKeyException; } Passed To Cipher.Cipher( ) |