org.cryptacular.generator.sp80038a

Class LongCounterNonce

java.lang.Object

org.cryptacular.generator.sp80038a.LongCounterNonce

All Implemented Interfaces:

Nonce

public class LongCounterNonce
extends 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.

Author:

Middleware Services

See Also:

BigIntegerCounterNonce

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

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.