com.ibm.crypto.ibmjcehybrid.provider

Class IBMSecureRandomHybrid

java.lang.Object

java.security.SecureRandomSpi

com.ibm.crypto.ibmjcehybrid.provider.IBMSecureRandomHybrid

All Implemented Interfaces:

java.io.Serializable

public final class IBMSecureRandomHybrid
extends java.security.SecureRandomSpi

This class is a facade for the IBM SecureRandom algorithm.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
IBMSecureRandomHybrid() Creates a new instance of the IBMSecureRandomHybrid class.
IBMSecureRandomHybrid(byte[] seed) Creates a new instance of the IBMSecureRandomHybrid class.

Method Summary

Modifier and Type	Method and Description
byte[]	engineGenerateSeed(int numBytes) This method generates a seed value that the app could pass back on a setSeed() call, or could pass to a different SecureRandom object on a setSeed() call.
void	engineNextBytes(byte[] bytes) Generates a user-specified number of random bytes.
void	engineSetSeed(byte[] seed) Sets the seed value for the random number generator.
java.security.SecureRandom	getBestInstance(byte[] seed) Creates an instance of the specified KeyGenerator, the provider will be the selecting the first provider in the list for the generator that returns a KeyGenerator object.
protected void	getGenerator(byte[] seed) Creates an instance of the SecureRandom.

Methods inherited from class java.lang.Object

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

Constructor Detail

IBMSecureRandomHybrid

public IBMSecureRandomHybrid()

Creates a new instance of the IBMSecureRandomHybrid class.

IBMSecureRandomHybrid

public IBMSecureRandomHybrid(byte[] seed)

Creates a new instance of the IBMSecureRandomHybrid class. Note: The seed has no real meaning in hardware and this constructor only exists for compatability with SecureRandomSpi.

Parameters:

seed - a series of bytes used as seed

Method Detail

engineSetSeed

public void engineSetSeed(byte[] seed)
                   throws java.lang.UnsupportedOperationException

Sets the seed value for the random number generator.

Specified by:

engineSetSeed in class java.security.SecureRandomSpi

Parameters:

seed - a series of bytes used as seed.

Throws:

java.lang.UnsupportedOperationException - is never thrown by this method.

engineNextBytes

public void engineNextBytes(byte[] bytes)

Generates a user-specified number of random bytes.

Specified by:

engineNextBytes in class java.security.SecureRandomSpi

Parameters:

bytes - the array to be filled in with random bytes.

engineGenerateSeed

public byte[] engineGenerateSeed(int numBytes)

This method generates a seed value that the app could pass back on a setSeed() call, or could pass to a different SecureRandom object on a setSeed() call.

Specified by:

engineGenerateSeed in class java.security.SecureRandomSpi

Parameters:

numBytes - the size of the seed to generate

getGenerator

protected void getGenerator(byte[] seed)

Creates an instance of the SecureRandom.

Throws:

java.lang.RuntimeException - if this method fails to create and to initialize the SecureRandom.

getBestInstance

public java.security.SecureRandom getBestInstance(byte[] seed)

Creates an instance of the specified KeyGenerator, the provider will be the selecting the first provider in the list for the generator that returns a KeyGenerator object.

Parameters:

seed - a series of bytes used as seed value.

Returns:

the requested Secure Random object

Throws:

java.lang.RuntimeException - if this constructor fails to authenticate the JCE framework.