javax.crypto.spec
Class DESedeKeySpec
- java.lang.Object
javax.crypto.spec.DESedeKeySpec
All implemented interfaces:
java.security.spec.KeySpec
- public class DESedeKeySpec
- extends java.lang.Object
- implements java.security.spec.KeySpec
Since:
1.4
Version:
1.20, 01/06/04
Author:
Jan Luehe
Field Summary
Modifier and Type | Field and Description |
---|---|
|
DES_EDE_KEY_LEN
The constant which defines the length of a DESede key in bytes.
|
Constructor Summary
Constructor and Description |
---|
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
Modifier and Type | Method and Description |
---|---|
|
getKey()
Returns the DES-EDE key.
|
|
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.
See Also:
Constructor Detail
DESedeKeySpec
- public DESedeKeySpec(byte[] key)
- throws java.security.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:
java.lang.NullPointerException
- if key
is null. java.security.InvalidKeyException
- if the given key material is shorter
than 24 bytes. DESedeKeySpec
- public DESedeKeySpec(byte[] key,
- int offset)
- throws java.security.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:
java.lang.NullPointerException
- if key
is null. java.security.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 java.security.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:
java.lang.NullPointerException
- if key
is null. java.security.InvalidKeyException
- if the given key material, starting at
offset
inclusive, is shorter than 24 bytes