javacardx.framework.math
Class ParityBit
java.lang.Object
javacardx.framework.math.ParityBit
@TransactionType(value=SUPPORTS)
public final class ParityBit
- extends Object
The ParityBit class is a utility to assist with DES key parity
bit generation.
- Since:
- 2.2.2
|
Constructor Summary |
ParityBit()
Intended to be package visible. |
|
Method Summary |
static void |
set(byte[] bArray,
short bOff,
short bLen,
boolean isEven)
Inserts the computed parity bit of the specified type as the last
bit(LSB) in each of the bytes of the specified byte array. |
ParityBit
public ParityBit()
- Intended to be package visible. Retain for compatibility
set
public static void set(byte[] bArray,
short bOff,
short bLen,
boolean isEven)
- Inserts the computed parity bit of the specified type as the last
bit(LSB) in each of the bytes of the specified byte array. The parity is
computed over the first(MS) 7 bits of each byte. The incoming last bit of
each byte is ignored.
Note:
- If
bOff or bLen
is negative an ArrayIndexOutOfBoundsException exception is thrown.
- If
bLen parameter is equal to 0 no parity bits are inserted.
- If
bOff+bLen is greater than bArray.length, the length
of the bArray array a ArrayIndexOutOfBoundsException exception is thrown
and no parity bits are inserted.
- If
bArray parameter is null
a NullPointerException exception is thrown.
- Parameters:
bArray - input/output byte arraybOff - offset within byte array to start setting parity onbLen - byte length of input/output bytesisEven - true if even parity is required and false if odd parity is required
- Throws:
NullPointerException - if bArray is null
ArrayIndexOutOfBoundsException - if accessing the input array would cause access of data outside array bounds
or if bLen is negative
Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.