Class Overview
The key specification for a DES key.
Summary
| Constants |
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| int |
DES_KEY_LEN |
The length of a DES key in bytes. |
| Public Constructors |
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DESKeySpec(byte[] key)
Creates a new DESKeySpec from the first 8 bytes of the
specified key data.
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DESKeySpec(byte[] key, int offset)
Creates a new DESKeySpec from the first 8 bytes of the
specified key data starting at offset.
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| Public Methods |
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byte[]
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getKey()
Returns a copy of the key.
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static
boolean
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isParityAdjusted(byte[] key, int offset)
Returns whether the specified key data starting at offset is
parity-adjusted.
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static
boolean
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isWeak(byte[] key, int offset)
Returns whether the specified key data starting at offset is
weak or semi-weak.
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[Expand]
Inherited Methods |
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From class java.lang.Object
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Object
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clone()
Creates and returns a copy of this Object.
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boolean
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equals(Object o)
Compares this instance with the specified object and indicates if they
are equal.
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void
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finalize()
Is called before the object's memory is being reclaimed by the VM.
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final
Class<? extends Object>
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getClass()
Returns the unique instance of Class which represents this
object's class. |
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int
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hashCode()
Returns an integer hash code for this object.
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final
void
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notify()
Causes a thread which is waiting on this object's monitor (by means of
calling one of the wait() methods) to be woken up.
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final
void
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notifyAll()
Causes all threads which are waiting on this object's monitor (by means
of calling one of the wait() methods) to be woken up.
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String
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toString()
Returns a string containing a concise, human-readable description of this
object.
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final
void
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wait(long millis, int nanos)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait(long millis)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait()
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.
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Constants
public
static
final
int
DES_KEY_LEN
The length of a DES key in bytes.
Constant Value:
8
(0x00000008)
Public Constructors
public
DESKeySpec
(byte[] key)
Creates a new DESKeySpec from the first 8 bytes of the
specified key data.
public
DESKeySpec
(byte[] key, int offset)
Creates a new DESKeySpec from the first 8 bytes of the
specified key data starting at offset.
Parameters
| key
| the key data |
| offset
| the offset to start at. |
Public Methods
public
byte[]
getKey
()
Returns a copy of the key.
public
static
boolean
isParityAdjusted
(byte[] key, int offset)
Returns whether the specified key data starting at offset is
parity-adjusted.
Parameters
| key
| the key data. |
| offset
| the offset to start checking at. |
Returns
true if the specified key data is parity-adjusted,
false otherwise.
Throws
| InvalidKeyException
| if the length of the key data starting at offset is less than
8, or the key is null.
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public
static
boolean
isWeak
(byte[] key, int offset)
Returns whether the specified key data starting at offset is
weak or semi-weak.
Parameters
| key
| the key data. |
| offset
| the offset to start checking at. |
Returns
true if the specified key data is weak or semi-weak.
Throws
| InvalidKeyException
| if the length of the key data starting at offset is less than
8, or it is null.
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