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java.lang.Object | +--javax.crypto.spec.DESKeySpec
This class specifies a DES key.
| Field Summary | |
|---|---|
static int |
DES_KEY_LEN
|
| Constructor Summary | |
|---|---|
DESKeySpec(byte[] key)
Uses the first 8 bytes in key as the key material for the DES key. |
|
DESKeySpec(byte[] key,
int offset)
Uses the first 8 bytes in key, beginning at
offset inclusive, as the key material for the DES key. |
|
| Method Summary | |
|---|---|
byte[] |
getKey()
Returns the DES key material. |
static boolean |
isParityAdjusted(byte[] key,
int offset)
Checks if the given DES key material, starting at offset
inclusive, is parity-adjusted. |
static boolean |
isWeak(byte[] key,
int offset)
Checks if the given DES key material is weak or semi-weak. |
| 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_KEY_LEN
| Constructor Detail |
public DESKeySpec(byte[] key)
throws java.security.InvalidKeyException
key as the key material for the DES key.
The bytes that constitute the DES key are those between
key[0] and key[7] inclusive.
key - - the buffer with the DES key material.
java.security.InvalidKeyException - - if the given key material is shorter than 8 bytes.
public DESKeySpec(byte[] key,
int offset)
throws java.security.InvalidKeyException
key, beginning at
offset inclusive, as the key material for the DES key.
The bytes that constitute the DES key are those between
key[offset] and key[offset+7] inclusive.
key - the buffer with the DES key material.offset - the offset in key, where the DES key material starts.
java.security.InvalidKeyException - if the given key material, starting at
offset inclusive, is shorter than 8 bytes.| Method Detail |
public byte[] getKey()
public static boolean isParityAdjusted(byte[] key,
int offset)
throws java.security.InvalidKeyException
offset
inclusive, is parity-adjusted.
key - the buffer with the DES key material.offset - the offset in key, where the DES key material starts.
java.security.InvalidKeyException - if the given key material, starting at offset
inclusive, is shorter than 8 bytes.
public static boolean isWeak(byte[] key,
int offset)
throws java.security.InvalidKeyException
key - the buffer with the DES key material.offset - the offset in key, where the DES key
material starts.
java.security.InvalidKeyException - if the given key material, starting at offset
inclusive, is shorter than 8 bytes.
|
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