gnu.crypto.prng

Class MDGenerator

java.lang.Object

tr.gov.tubitak.uekae.esya.api.common.crypto.BasePRNG

gnu.crypto.prng.MDGenerator

All Implemented Interfaces:

java.lang.Cloneable, tr.gov.tubitak.uekae.esya.api.common.crypto.IRandom

public class MDGenerator
extends tr.gov.tubitak.uekae.esya.api.common.crypto.BasePRNG

A simple pseudo-random number generator that relies on a hash algorithm, that (a) starts its operation by hashing a seed, and then (b) continuously re-hashing its output. If no hash algorithm name is specified in the Map of attributes used to initialise the instance then the SHA-160 algorithm is used as the underlying hash function. Also, if no seed is given, an empty octet sequence is used.

Version:

$Revision: 1.1 $

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	MD_NAME Property name of underlying hash algorithm for this generator.
static java.lang.String	SEEED_GENERATOR Property name of seed material.
static java.lang.String	SEEED_LENGTH

Fields inherited from class tr.gov.tubitak.uekae.esya.api.common.crypto.BasePRNG

buffer, bufferSize, initialised, MIN_BUFFER_SIZE, name, ndx

Constructor Summary

Constructors

Constructor and Description
MDGenerator() Trivial 0-arguments constructor.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone()
void	fillBlock()
void	setup(java.util.Map attributes)

Methods inherited from class tr.gov.tubitak.uekae.esya.api.common.crypto.BasePRNG

getBufferSize, init, isInitialised, isUseTRSU, name, nextByte, nextBytes, setBufferSize

Methods inherited from class java.lang.Object

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

Field Detail

MD_NAME

public static final java.lang.String MD_NAME

Property name of underlying hash algorithm for this generator.

See Also:

Constant Field Values

SEEED_GENERATOR

public static final java.lang.String SEEED_GENERATOR

Property name of seed material.

See Also:

Constant Field Values

SEEED_LENGTH

public static final java.lang.String SEEED_LENGTH

See Also:

Constant Field Values

Constructor Detail

MDGenerator

public MDGenerator()

Trivial 0-arguments constructor.

Method Detail

clone

public java.lang.Object clone()

Specified by:

clone in interface tr.gov.tubitak.uekae.esya.api.common.crypto.IRandom

Specified by:

clone in class tr.gov.tubitak.uekae.esya.api.common.crypto.BasePRNG

setup

public void setup(java.util.Map attributes)

Specified by:

setup in class tr.gov.tubitak.uekae.esya.api.common.crypto.BasePRNG

fillBlock

public void fillBlock()
               throws tr.gov.tubitak.uekae.esya.api.common.crypto.LimitReachedException

Specified by:

fillBlock in class tr.gov.tubitak.uekae.esya.api.common.crypto.BasePRNG

Throws:

tr.gov.tubitak.uekae.esya.api.common.crypto.LimitReachedException