This documentation differs from the official API. Jadeite adds extra features to the API including: variable font sizes, constructions examples, placeholders for classes and methods, and auto-generated “See Also” links. Additionally it is missing some items found in standard Javadoc documentation, including: generics type information, “Deprecated” tags and comments, “See Also” links, along with other minor differences. Please send any questions or feedback to bam@cs.cmu.edu.
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javax.crypto.spec
class DESedeKeySpec

java.lang.Object extended by javax.crypto.spec.DESedeKeySpec
All Implemented Interfaces:
KeySpec
public class DESedeKeySpec
extends Object
implements KeySpec

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

Field Summary
static int DES_EDE_KEY_LEN
          The constant which defines the length of a DESede key in bytes.
 
Constructor Summary
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.
 
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 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 constant which defines the length of a DESede key in bytes.
Constructor Detail

DESedeKeySpec

public DESedeKeySpec(byte[] key)
              throws InvalidKeyException
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 - the buffer with the DES-EDE key material. The first 24 bytes of the buffer are copied to protect against subsequent modification.
Throws:
InvalidKeyException - if the given key material is shorter than 24 bytes.

DESedeKeySpec

public DESedeKeySpec(byte[] key,
                     int offset)
              throws InvalidKeyException
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 - 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 - the offset in key, where the DES-EDE 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 DES-EDE key.

Returns:
the DES-EDE key. Returns a new array each time this method is called.

isParityAdjusted

public static boolean isParityAdjusted(byte[] key,
                                       int offset)
                                throws InvalidKeyException
Checks if the given DES-EDE key, starting at offset inclusive, is parity-adjusted.

Parameters:
key - a byte array which holds the key value
offset - the offset into the byte array
Returns:
true if the given DES-EDE key is parity-adjusted, false otherwise
Throws:
InvalidKeyException - if the given key material, starting at offset inclusive, is shorter than 24 bytes
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This documentation differs from the official API. Jadeite adds extra features to the API including: variable font sizes, constructions examples, placeholders for classes and methods, and auto-generated “See Also” links. Additionally it is missing some items found in standard Javadoc documentation, including: generics type information, “Deprecated” tags and comments, “See Also” links, along with other minor differences. Please send any questions or feedback to bam@cs.cmu.edu.
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Copyright 2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
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