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Java™ Platform Standard Ed. 6 |
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java.lang.Objectjavax.crypto.spec.DESedeKeySpec
public class DESedeKeySpec
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. |
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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. |
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| 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 |
|---|
public static final int DES_EDE_KEY_LEN
| Constructor Detail |
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public DESedeKeySpec(byte[] key)
throws InvalidKeyException
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
key - the buffer with the DES-EDE key material. The first
24 bytes of the buffer are copied to protect against subsequent
modification.
NullPointerException - if key is null.
InvalidKeyException - if the given key material is shorter
than 24 bytes.
public DESedeKeySpec(byte[] key,
int offset)
throws InvalidKeyException
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.
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.
NullPointerException - if key is null.
InvalidKeyException - if the given key material, starting at
offset inclusive, is shorter than 24 bytes| Method Detail |
|---|
public byte[] getKey()
public static boolean isParityAdjusted(byte[] key,
int offset)
throws InvalidKeyException
offset
inclusive, is parity-adjusted.
key - a byte array which holds the key valueoffset - the offset into the byte array
NullPointerException - if key is null.
InvalidKeyException - if the given key material, starting at
offset inclusive, is shorter than 24 bytes
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Java™ Platform Standard Ed. 6 |
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Copyright 2006 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.