de.flexiprovider.core.desede
Class DESedeKeySpec

java.lang.Object
  |
  +--de.flexiprovider.core.desede.DESedeKeySpec

All Implemented Interfaces:

KeySpec, java.security.spec.KeySpec

public class DESedeKeySpec

extends java.lang.Object

implements KeySpec

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

Field Summary

static int	DES_EDE_KEY_LEN The length of a DESede key in bytes.
javax.crypto.spec.DESedeKeySpec	javaKeySpec A reference to a DESedeKeySpec.

Constructor Summary

DESedeKeySpec(byte[] key)
Uses the first 24 bytes in key as the key material for the DESede key.

DESedeKeySpec(byte[] key, int offset)
Uses the first 24 bytes in key, beginning at offset inclusive, as the key material for the DESede key.

DESedeKeySpec(javax.crypto.spec.DESedeKeySpec keySpec)
Create a new DESedeKeySpec out of the given DESedeKeySpec.

Method Summary

byte[]	getKey()
static boolean	isParityAdjusted(byte[] key, int offset) Checks if the given DESede key material, starting at offset inclusive, is parity-adjusted.

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DES_EDE_KEY_LEN

public static final int DES_EDE_KEY_LEN

The length of a DESede key in bytes.

javaKeySpec

public javax.crypto.spec.DESedeKeySpec javaKeySpec

A reference to a DESedeKeySpec.

Constructor Detail

DESedeKeySpec

public DESedeKeySpec(javax.crypto.spec.DESedeKeySpec keySpec)

Create a new DESedeKeySpec out of the given DESedeKeySpec.

Parameters:

keySpec - the DSAPrivateKeySpec

DESedeKeySpec

public DESedeKeySpec(byte[] key)
              throws InvalidKeyException

Uses the first 24 bytes in key as the key material for the DESede key. The key bytes are those between key[0] and key[23] inclusive.

Parameters:

key - the buffer with the DESede key material

Throws:

InvalidKeyException - if the given key material is shorter than 24 bytes.

DESedeKeySpec

public DESedeKeySpec(byte[] key,
                     int offset)
              throws InvalidKeyException

Uses the first 24 bytes in key, beginning at offset inclusive, as the key material for the DESede key. The key bytes are those between key[offset] and key[offset+23] inclusive.

Parameters:

key - the buffer with the DESede key material

offset - the offset where the DESede key material starts

Throws:

InvalidKeyException - if the given key material, starting at offset inclusive, is shorter than 24 bytes.

Method Detail

getKey

public byte[] getKey()

Returns:

the DESede key material

isParityAdjusted

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

Checks if the given DESede key material, starting at offset inclusive, is parity-adjusted.

Parameters:

key - the buffer with the DESede key material

offset - the offset in key, where the DESede key material starts

Returns:

true if the given DESede key material is parity-adjusted, false otherwise

Throws:

InvalidKeyException - if the given key material, starting at offset inclusive, is shorter than 24 bytes.