Class NullCipher

java.lang.Object

javax.crypto.Cipher

javax.crypto.NullCipher

public class NullCipher
extends Cipher

The NullCipher class is a class that provides an "identity cipher" -- one that does not transform the plain text. As a consequence, the ciphertext is identical to the plaintext. All initialization methods do nothing, while the blocksize is set to 1 byte. Unlike other ciphers, the NullCipher has no state, and will never throw an IllegalStateException when Cipher methods are called.

Since:

1.4

Field Summary

Fields declared in class javax.crypto.Cipher

DECRYPT_MODE, ENCRYPT_MODE, PRIVATE_KEY, PUBLIC_KEY, SECRET_KEY, UNWRAP_MODE, WRAP_MODE

Constructor Summary

Constructors

Constructor	Description
NullCipher()	Creates a NullCipher object.

Method Summary

Methods declared in class javax.crypto.Cipher

doFinal, doFinal, doFinal, doFinal, doFinal, doFinal, doFinal, getAlgorithm, getBlockSize, getExemptionMechanism, getInstance, getInstance, getInstance, getIV, getMaxAllowedKeyLength, getMaxAllowedParameterSpec, getOutputSize, getParameters, getProvider, init, init, init, init, init, init, init, init, toString, unwrap, update, update, update, update, update, updateAAD, updateAAD, updateAAD, wrap

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

NullCipher

public NullCipher()

Creates a NullCipher object.