CipherWithWrappingSpi

extends CipherSpi

java.lang.Object
↳	javax.crypto.CipherSpi
	↳	com.sun.crypto.provider.CipherWithWrappingSpi

Class Overview

This class entends the javax.crypto.CipherSpi class with a concrete implementation of the methods for wrapping and unwrapping keys.

Summary

Public Constructors
	CipherWithWrappingSpi()

Protected Methods
final Key	engineUnwrap(byte[] wrappedKey, String wrappedKeyAlgorithm, int wrappedKeyType) Unwrap a previously wrapped key.
final byte[]	engineWrap(Key key) Wrap a key.

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Inherited Methods

From class javax.crypto.CipherSpi

abstract byte[]	engineDoFinal(byte[] input, int inputOffset, int inputLen) Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.
int	engineDoFinal(ByteBuffer input, ByteBuffer output) Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.
abstract int	engineDoFinal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.
abstract int	engineGetBlockSize() Returns the block size (in bytes).
abstract byte[]	engineGetIV() Returns the initialization vector (IV) in a new buffer.
int	engineGetKeySize(Key key) Returns the key size of the given key object in bits.
abstract int	engineGetOutputSize(int inputLen) Returns the length in bytes that an output buffer would need to be in order to hold the result of the next `update` or `doFinal` operation, given the input length `inputLen` (in bytes).
abstract AlgorithmParameters	engineGetParameters() Returns the parameters used with this cipher.
abstract void	engineInit(int opmode, Key key, AlgorithmParameters params, SecureRandom random) Initializes this cipher with a key, a set of algorithm parameters, and a source of randomness.
abstract void	engineInit(int opmode, Key key, SecureRandom random) Initializes this cipher with a key and a source of randomness.
abstract void	engineInit(int opmode, Key key, AlgorithmParameterSpec params, SecureRandom random) Initializes this cipher with a key, a set of algorithm parameters, and a source of randomness.
abstract void	engineSetMode(String mode) Sets the mode of this cipher.
abstract void	engineSetPadding(String padding) Sets the padding mechanism of this cipher.
Key	engineUnwrap(byte[] wrappedKey, String wrappedKeyAlgorithm, int wrappedKeyType) Unwrap a previously wrapped key.
int	engineUpdate(ByteBuffer input, ByteBuffer output) Continues a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.
abstract int	engineUpdate(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) Continues a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.
abstract byte[]	engineUpdate(byte[] input, int inputOffset, int inputLen) Continues a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.
byte[]	engineWrap(Key key) Wrap a key.

From class java.lang.Object

Object	clone() Creates and returns a copy of this object.
boolean	equals(Object obj) Indicates whether some other object is "equal to" this one.
void	finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
final Class<?>	getClass() Returns the runtime class of this `Object`.
int	hashCode() Returns a hash code value for the object.
final void	notify() Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll() Wakes up all threads that are waiting on this object's monitor.
String	toString() Returns a string representation of the object.
final void	wait() Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
final void	wait(long timeout, int nanos) Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
final void	wait(long timeout) Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.

Public Constructors

public CipherWithWrappingSpi ()

Protected Methods

protected final Key engineUnwrap (byte[] wrappedKey, String wrappedKeyAlgorithm, int wrappedKeyType)

Unwrap a previously wrapped key.

Parameters

wrappedKey	the key to be unwrapped.
wrappedKeyAlgorithm	the algorithm the wrapped key is for.
wrappedKeyType	the type of the wrapped key. This is one of `Cipher.SECRET_KEY`, `Cipher.PRIVATE_KEY`, or `Cipher.PUBLIC_KEY`.

Returns

the unwrapped key.

Throws

InvalidKeyException	if `wrappedKey` does not represent a wrapped key, or if the algorithm associated with the wrapped key is different from `wrappedKeyAlgorithm` and/or its key type is different from `wrappedKeyType`.
NoSuchAlgorithmException	if no installed providers can create keys for the `wrappedKeyAlgorithm`.

protected final byte[] engineWrap (Key key)

Wrap a key.

Parameters

key	the key to be wrapped.

Returns

the wrapped key.

Throws

IllegalBlockSizeException	if this cipher is a block cipher, no padding has been requested, and the length of the encoding of the key to be wrapped is not a multiple of the block size.
InvalidKeyException	if it is impossible or unsafe to wrap the key with this cipher (e.g., a hardware protected key is being passed to a software only cipher).

Classes

CipherWithWrappingSpi

Class Overview

See Also

Summary

Public Constructors

public CipherWithWrappingSpi ()

Protected Methods

protected final Key engineUnwrap (byte[] wrappedKey, String wrappedKeyAlgorithm, int wrappedKeyType)

Parameters

Returns

Throws

protected final byte[] engineWrap (Key key)

Parameters

Returns

Throws