Classes

Summary: Constants | Ctors | Methods | Inherited Methods | [Expand All]

Added in API level 1

public class

DESKeySpec

extends Object
implements KeySpec

java.lang.Object
↳	javax.crypto.spec.DESKeySpec

Class Overview

The key specification for a DES key.

Summary

Constants
int	DES_KEY_LEN	The length of a DES key in bytes.

Public Constructors
	DESKeySpec(byte[] key) Creates a new `DESKeySpec` from the first 8 bytes of the specified key data.
	DESKeySpec(byte[] key, int offset) Creates a new `DESKeySpec` from the first 8 bytes of the specified key data starting at `offset`.

Public Methods
byte[]	getKey() Returns a copy of the key.
static boolean	isParityAdjusted(byte[] key, int offset) Returns whether the specified key data starting at `offset` is parity-adjusted.
static boolean	isWeak(byte[] key, int offset) Returns whether the specified key data starting at `offset` is weak or semi-weak.

[Expand]

Inherited Methods

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.

Constants

public static final int DES_KEY_LEN

Added in API level 1

The length of a DES key in bytes.

Constant Value: 8 (0x00000008)

Public Constructors

public DESKeySpec (byte[] key)

Added in API level 1

Creates a new DESKeySpec from the first 8 bytes of the specified key data.

Parameters

key	the key data.

Throws

InvalidKeyException	if the length of the specified key data is less than 8.

public DESKeySpec (byte[] key, int offset)

Added in API level 1

Creates a new DESKeySpec from the first 8 bytes of the specified key data starting at offset.

Parameters

key	the key data
offset	the offset to start at.

Throws

InvalidKeyException	if the length of the specified key data starting at offset is less than 8.

Public Methods

public byte[] getKey ()

Added in API level 1

Returns a copy of the key.

Returns

a copy of the key.

public static boolean isParityAdjusted (byte[] key, int offset)

Added in API level 1

Returns whether the specified key data starting at offset is parity-adjusted.

Parameters

key	the key data.
offset	the offset to start checking at.

Returns

true if the specified key data is parity-adjusted, false otherwise.

Throws

InvalidKeyException	if the length of the key data starting at offset is less than 8, or the key is null.

public static boolean isWeak (byte[] key, int offset)

Added in API level 1

Returns whether the specified key data starting at offset is weak or semi-weak.

Parameters

key	the key data.
offset	the offset to start checking at.

Returns

true if the specified key data is weak or semi-weak.

Throws

InvalidKeyException	if the length of the key data starting at offset is less than 8, or it is null.

Results

Classes

DESKeySpec

Class Overview

Summary

Constants

public static final int DES_KEY_LEN

Public Constructors

public DESKeySpec (byte[] key)

Parameters

Throws

public DESKeySpec (byte[] key, int offset)

Parameters

Throws

Public Methods

public byte[] getKey ()

Returns

public static boolean isParityAdjusted (byte[] key, int offset)

Parameters

Returns

Throws

public static boolean isWeak (byte[] key, int offset)

Parameters

Returns

Throws