javax.crypto.spec
Class DESedeKeySpec

java.lang.Object
  |
  +--javax.crypto.spec.DESedeKeySpec

public class DESedeKeySpec
extends Object
implements KeySpec

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

See Also:
Key, KeyFactory, KeySpec

Field Summary
static int DES_EDE_KEY_LEN
           
 
Constructor Summary
DESedeKeySpec(byte[] key)
          Uses the first 24 bytes in key as the DES-EDE key
DESedeKeySpec(byte[] key, int offset)
          Uses the first 24 bytes in key, beginning at offset, as the DES-EDE key
 
Method Summary
 byte[] getKey()
          Returns the DES-EDE key.
static boolean isParityAdjusted(byte[] key, int offset)
          Checks if the given DES-EDE key, starting at offset, 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
Constructor Detail

DESedeKeySpec

public DESedeKeySpec(byte[] key)
              throws InvalidKeyException
Uses the first 24 bytes in key as the DES-EDE key
Parameters:
key - the buffer with the DES-EDE key
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, as the DES-EDE key
Parameters:
key - the buffer with the DES-EDE key
offset - the offset in key, where the DES-EDE key starts
Throws:
InvalidKeyException - if the given key material, starting at offset, is shorter than 24 bytes
Method Detail

getKey

public byte[] getKey()
Returns the DES-EDE key.
Returns:
the DES-EDE key

isParityAdjusted

public static boolean isParityAdjusted(byte[] key,
                                       int offset)
                                throws InvalidKeyException
Checks if the given DES-EDE key, starting at offset, is parity-adjusted.
Returns:
true if the given DES-EDE key is parity-adjusted, false otherwise
Throws:
InvalidKeyException - if the given key material, starting at offset, is shorter than 24 bytes