DESedeKeySpec (GNU Classpath 0.94-pre Documentation)

Class DESedeKeySpec

public class DESedeKeySpec extends Object implements KeySpec

This class is a transparent wrapper for DES-EDE (Triple-DES) keys, which are arrays of 24 bytes.

Since: 1.4

Field Summary
static int	DES_EDE_KEY_LEN The length of a triple-DES key, in bytes.

static int

The length of a triple-DES key, in bytes.

Constructor Summary
	DESedeKeySpec(byte[] key) Create a new DES-EDE key spec, copying the first 24 bytes from the byte array.
	DESedeKeySpec(byte[] key, int offset) Create a new DES-EDE key spec, starting at `offset` in the byte array.

Create a new DES-EDE key spec, copying the first 24 bytes from the byte array.

DESedeKeySpec(byte[] key, int offset)

Create a new DES-EDE key spec, starting at offset in the byte array.

Method Summary
byte[]	getKey() Return the key as a byte array.
static boolean	isParityAdjusted(byte[] key, int offset) Returns whether or not the given key is parity adjusted; i.e. every byte in the key has an odd number of "1" bits.

byte[]

Return the key as a byte array.

static boolean

isParityAdjusted(byte[] key, int offset)

Returns whether or not the given key is parity adjusted; i.e. every byte in the key has an odd number of "1" bits.

The length of a triple-DES key, in bytes.

Create a new DES-EDE key spec, copying the first 24 bytes from the byte array.

Parameters: key The key bytes.

Throws: java.security.InvalidKeyException If there are less than 24 bytes in the array.

Create a new DES-EDE key spec, starting at offset in the byte array. The first 24 bytes starting at offset are copied.

Parameters: key The key bytes. offset The offset into the byte array at which to begin.

Throws: java.security.InvalidKeyException If there are less than 24 bytes starting at offset.

Return the key as a byte array. This method does not copy the byte array.

Returns: The key bytes.

Returns whether or not the given key is parity adjusted; i.e. every byte in the key has an odd number of "1" bits.

Parameters: key The key bytes, considered between [offset, offset+23] offset The offset into the byte array at which to begin.

Returns: True if all bytes have an odd number of "1" bits.

Throws: java.security.InvalidKeyException If there are not enough bytes in the array.