iaik.security.random

Class AWT10SeedGenerator

java.lang.Object

iaik.security.random.SeedGenerator

iaik.security.random.VarLengthSeedGenerator

iaik.security.random.HashObjectSeedGenerator

iaik.security.random.AWT10SeedGenerator

public class AWT10SeedGenerator
extends HashObjectSeedGenerator

This class generates a PRNG seed from user generated AWT events following the JDK 1.0 AWT event model. It is a subclass of HashObjectSeedGenerator and uses its API, see there for more documentation.

Version:

File Revision 12

See Also:

HashObjectSeedGenerator, AWT11SeedGenerator

Field Summary

Fields inherited from class iaik.security.random.SeedGenerator

seedGenListener

Constructor Summary

Constructors

Constructor and Description
AWT10SeedGenerator() Generate a seed generator for the default number of random bits (currently 136).
AWT10SeedGenerator(int numBits) Generate a seed generator for the specified number of bits.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	addEvent(java.awt.Event event) Deprecated. use addSeedObject() instead.
protected int	extractSeedData(java.lang.Object obj) Add the given object to the seed.

Methods inherited from class iaik.security.random.HashObjectSeedGenerator

addSeedObject, getMessageDigest, getSeed, getStatus, reinit, updateHash, updateHash, updateHash

Methods inherited from class iaik.security.random.VarLengthSeedGenerator

getDefault, getSeedLength, hasSeedLengthChanged, setDefault, setSeedLength

Methods inherited from class iaik.security.random.SeedGenerator

callSeedGenListener, getDefault, getDefaultSeedGenerator, seedAvailable, setDefaultSeedGenerator, setSeedGenListener

Methods inherited from class java.lang.Object

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

Constructor Detail

AWT10SeedGenerator

public AWT10SeedGenerator(int numBits)

Generate a seed generator for the specified number of bits.

AWT10SeedGenerator

public AWT10SeedGenerator()

Generate a seed generator for the default number of random bits (currently 136).

Method Detail

addEvent

public boolean addEvent(java.awt.Event event)

Deprecated. use addSeedObject() instead.

This method is deprecated and supported for compatibility only. It will be removed in the next major release.

extractSeedData

protected int extractSeedData(java.lang.Object obj)
                       throws java.lang.IllegalArgumentException

Add the given object to the seed. The object must be an instance of java.awt.Event. This method will hash the current time, the toString() representation of the event, and System.identityHashCode(). The uncertainty per event is assumed to be 3 bits. This method is called by addSeedObject() with the object passed to it.

Specified by:

extractSeedData in class HashObjectSeedGenerator

Throws:

RandomException - if obj is not a subclass of java.awt.Event

java.lang.IllegalArgumentException