NullCipher

This class provides an identity cipher that does not transform the input data in any way. The encrypted data is identical to the plain text .

Summary

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Inherited Constants

From class javax.crypto.Cipher

Public Constructors
	NullCipher () Creates a new `NullCipher` instance.

Public Constructors

NullCipher ()

Creates a new


           NullCipher

instance.

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Inherited Methods

From class javax.crypto.Cipher

final int	doFinal (byte[] output, int outputOffset) Finishes a multi-part transformation (encryption or decryption).
final byte[]	doFinal (byte[] input, int inputOffset, int inputLen) Finishes a multi-part transformation (encryption or decryption).
final int	doFinal (byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) Finishes a multi-part transformation (encryption or decryption).
final int	doFinal (byte[] input, int inputOffset, int inputLen, byte[] output) Finishes a multi-part transformation (encryption or decryption).
final byte[]	doFinal (byte[] input) Finishes a multi-part transformation (encryption or decryption).
final int	doFinal ( ByteBuffer input, ByteBuffer output) Finishes a multi-part transformation (encryption or decryption).
final byte[]	doFinal () Finishes a multi-part transformation (encryption or decryption).
final String	getAlgorithm () Returns the name of the algorithm of this cipher instance.
final int	getBlockSize () Returns this ciphers block size (in bytes).
final ExemptionMechanism	getExemptionMechanism () Returns the exemption mechanism associated with this cipher.
final byte[]	getIV () Returns the initialization vector for this cipher instance.
final static Cipher	getInstance ( String transformation, String provider) Creates a new cipher for the specified transformation provided by the specified provider.
final static Cipher	getInstance ( String transformation, Provider provider) Creates a new cipher for the specified transformation.
final static Cipher	getInstance ( String transformation) Creates a new Cipher for the specified transformation.
final static int	getMaxAllowedKeyLength ( String transformation) Returns the maximum key length for the specified transformation.
final static AlgorithmParameterSpec	getMaxAllowedParameterSpec ( String transformation) Returns the maximum cipher parameter value for the specified transformation.
final int	getOutputSize (int inputLen) Returns the length in bytes an output buffer needs to be when this cipher is updated with `inputLen` bytes.
final AlgorithmParameters	getParameters () Returns the parameters that where used to create this cipher instance.
final Provider	getProvider () Returns the provider of this cipher instance.
final void	init (int opmode, Key key) Initializes this cipher instance with the specified key.
final void	init (int opmode, Key key, SecureRandom random) Initializes this cipher instance with the specified key and a source of randomness.
final void	init (int opmode, Key key, AlgorithmParameterSpec params, SecureRandom random) Initializes this cipher instance with the specified key, algorithm parameters and a source of randomness.
final void	init (int opmode, Key key, AlgorithmParameters params, SecureRandom random) Initializes this cipher instance with the specified key, algorithm parameters and a source of randomness.
final void	init (int opmode, Key key, AlgorithmParameterSpec params) Initializes this cipher instance with the specified key and algorithm parameters.
final void	init (int opmode, Certificate certificate, SecureRandom random) Initializes this cipher instance with the public key from the specified certificate and a source of randomness.
final void	init (int opmode, Certificate certificate) Initializes this cipher instance with the public key from the specified certificate.
final void	init (int opmode, Key key, AlgorithmParameters params) Initializes this cipher instance with the specified key and algorithm parameters.
final Key	unwrap (byte[] wrappedKey, String wrappedKeyAlgorithm, int wrappedKeyType) Unwraps a key using this cipher instance.
final int	update ( ByteBuffer input, ByteBuffer output) Continues a multi-part transformation (encryption or decryption).
final byte[]	update (byte[] input) Continues a multi-part transformation (encryption or decryption).
final int	update (byte[] input, int inputOffset, int inputLen, byte[] output) Continues a multi-part transformation (encryption or decryption).
final byte[]	update (byte[] input, int inputOffset, int inputLen) Continues a multi-part transformation (encryption or decryption).
final int	update (byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) Continues a multi-part transformation (encryption or decryption).
final void	updateAAD ( ByteBuffer input) Continues a multi-part transformation (encryption or decryption) with Authenticated Additional Data (AAD).
final void	updateAAD (byte[] input, int inputOffset, int inputLen) Continues a multi-part transformation (encryption or decryption) with Authenticated Additional Data (AAD).
final void	updateAAD (byte[] input) Continues a multi-part transformation (encryption or decryption) with Authenticated Additional Data (AAD).
final byte[]	wrap ( Key key) Wraps a key using this cipher instance.

From class java.lang.Object

Object	clone () Creates and returns a copy of this `Object` .
boolean	equals ( Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize () Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class <?>	getClass () Returns the unique instance of `Class` that represents this object's class.
int	hashCode () Returns an integer hash code for this object.
final void	notify () Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll () Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString () Returns a string containing a concise, human-readable description of this object.
final void	wait () Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait (long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait (long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Constructors

public NullCipher ()

Added in API level 1

Creates a new NullCipher instance.

java.lang.Object
↳	javax.crypto.Cipher
	↳	javax.crypto.NullCipher

Results

Interfaces

Classes

Exceptions

Class Overview

Summary

Public Constructors

public NullCipher ()