DESedeKeySpec

public class DESedeKeySpec
extends Object implements KeySpec

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

This class specifies a DES-EDE ("triple-DES") key.

Summary

Constants
`int`	`DES_EDE_KEY_LEN` The constant which defines the length of a DESede key in bytes.

Public constructors
`DESedeKeySpec(byte[] key)` Creates a DESedeKeySpec object using the first 24 bytes in `key` as the key material for the DES-EDE key.
`DESedeKeySpec(byte[] key, int offset)` Creates a DESedeKeySpec object using the first 24 bytes in `key`, beginning at `offset` inclusive, as the key material for the DES-EDE key.

Public methods
`byte[]`	`getKey()` Returns the DES-EDE key.
`static boolean`	`isParityAdjusted(byte[] key, int offset)` Checks if the given DES-EDE key, starting at `offset` inclusive, is parity-adjusted.

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(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Added in API level 1

public static final int DES_EDE_KEY_LEN

The constant which defines the length of a DESede key in bytes.

Constant Value: 24 (0x00000018)

Added in API level 1

public DESedeKeySpec (byte[] key)

Creates a DESedeKeySpec object using the first 24 bytes in key as the key material for the DES-EDE key.

The bytes that constitute the DES-EDE key are those between key[0] and key[23] inclusive

Parameters
`key`	`byte`: the buffer with the DES-EDE key material. The first 24 bytes of the buffer are copied to protect against subsequent modification.

Throws
`NullPointerException`	if `key` is null.
`InvalidKeyException`	if the given key material is shorter than 24 bytes.

Added in API level 1

public DESedeKeySpec (byte[] key, 
                int offset)

Creates a DESedeKeySpec object using the first 24 bytes in key, beginning at offset inclusive, as the key material for the DES-EDE key.

The bytes that constitute the DES-EDE key are those between key[offset] and key[offset+23] inclusive.

Parameters
`key`	`byte`: the buffer with the DES-EDE key material. The first 24 bytes of the buffer beginning at `offset` inclusive are copied to protect against subsequent modification.
`offset`	`int`: the offset in `key`, where the DES-EDE key material starts.

Throws
`NullPointerException`	if `key` is null.
`InvalidKeyException`	if the given key material, starting at `offset` inclusive, is shorter than 24 bytes

Added in API level 1

public byte[] getKey ()

Returns the DES-EDE key.

Returns
`byte[]`	the DES-EDE key. Returns a new array each time this method is called.

Added in API level 1

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

Checks if the given DES-EDE key, starting at offset inclusive, is parity-adjusted.

Parameters
`key`	`byte`: a byte array which holds the key value
`offset`	`int`: the offset into the byte array

Returns
`boolean`	true if the given DES-EDE key is parity-adjusted, false otherwise

Throws
`NullPointerException`	if `key` is null.
`InvalidKeyException`	if the given key material, starting at `offset` inclusive, is shorter than 24 bytes