Java Cryptography

Name

Class javax.crypto.CipherSpi

Description

The CipherSpi class is the parent class of all cipher implementations. To implement a particular cipher algorithm, create a subclass of CipherSpi and define all its methods. Most of the methods correspond to methods in Cipher’s API; for example, a call to Cipher’s getBlockSize() method results in a call to the implementation’s engineGetBlockSize().

Class Definition

public abstract class javax.crypto.CipherSpi
  extends java.lang.Object {

  // Constructors
  public CipherSpi();

  // Protected Instance Methods
  protected abstract byte[] engineDoFinal(byte[], int, int);
  protected abstract int engineDoFinal(byte[], int, int, byte[], int);
  protected abstract int engineGetBlockSize();
  protected abstract byte[] engineGetIV();
  protected abstract int engineGetOutputSize(int);
  protected abstract void engineInit(int, Key, SecureRandom);
  protected abstract void engineInit(int, Key, AlgorithmParameterSpec,
    SecureRandom);
  protected abstract void engineSetMode(String);
  protected abstract void engineSetPadding(String);
  protected abstract byte[] engineUpdate(byte[], int, int);
  protected abstract int engineUpdate(byte[], int, int, byte[], int);
}

See Also

AlgorithmParameterSpec, Cipher, Key, SecureRandom