org.cryptacular.generator.sp80038a

Class LongCounterNonce

java.lang.Object

org.cryptacular.generator.sp80038a.LongCounterNonce

All Implemented Interfaces:

Nonce

public class LongCounterNonce
extends java.lang.Object
implements Nonce

Simple counter nonce that uses a long integer counter internally and produces 8-byte nonces. Note that this component is suitable exclusively for ciphers with block length 8, e.g. Blowfish.

Instances of this class are thread safe.

See Also:

BigIntegerCounterNonce

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.concurrent.atomic.AtomicLong	counter Counter.

Constructor Summary

Constructors

Constructor and Description
LongCounterNonce() Creates a new instance whose counter values start at 1.
LongCounterNonce(long start) Creates a new instance whose counter values start above the given value.

Method Summary

Modifier and Type	Method and Description
byte[]	generate() Generates a nonce value.
int	getLength()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

counter

private final java.util.concurrent.atomic.AtomicLong counter

Counter.

Constructor Detail

LongCounterNonce

public LongCounterNonce()

Creates a new instance whose counter values start at 1.

LongCounterNonce

public LongCounterNonce(long start)

Creates a new instance whose counter values start above the given value.

Parameters:

start - Start value.

Method Detail

generate

public byte[] generate()
                throws LimitException

Description copied from interface: Nonce

Generates a nonce value.

Specified by:

generate in interface Nonce

Returns:

Nonce bytes.

Throws:

LimitException - When a limit imposed by the nonce generation strategy, if any, is exceeded.

getLength

public int getLength()

Specified by:

getLength in interface Nonce

Returns:

Length in bytes of generated nonce values.