javax.crypto.spec
Class DESedeKeySpec
java.lang.Object
|
+--javax.crypto.spec.DESedeKeySpec
- public class DESedeKeySpec
- extends java.lang.Object
- implements java.security.spec.KeySpec
This class specifies a DES-EDE ("triple-DES") key.
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 inclusive, 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
inclusive, is parity-adjusted. |
Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
DES_EDE_KEY_LEN
public static final int DES_EDE_KEY_LEN
DESedeKeySpec
public DESedeKeySpec(byte[] key)
throws java.security.InvalidKeyException
- Uses the first 24 bytes in
key
as 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.- Throws:
- java.security.InvalidKeyException - if the given key material is shorter
than 24 bytes.
DESedeKeySpec
public DESedeKeySpec(byte[] key,
int offset)
throws java.security.InvalidKeyException
- Uses the first 24 bytes in
key
, beginning at
offset
inclusive, as 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.offset
- the offset in key
, where the DES-EDE key
material starts.- Throws:
- java.security.InvalidKeyException - if the given key material, starting at
offset
inclusive, is shorter than 24 bytes
getKey
public byte[] getKey()
- Returns the DES-EDE key.
- Returns:
- the DES-EDE key
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.
- Returns:
- true if the given DES-EDE key is parity-adjusted, false
otherwise
- Throws:
- java.security.InvalidKeyException - if the given key material, starting at
offset
inclusive, is shorter than 24 bytes