Module ibm.crypto.ibmjcehybrid

Package com.ibm.crypto.ibmjcehybrid.provider

Class SHA1PRNGHybrid

java.lang.Object

java.security.SecureRandomSpi

com.ibm.crypto.ibmjcehybrid.provider.SHA1PRNGHybrid

All Implemented Interfaces:

Serializable

public final class SHA1PRNGHybrid
extends SecureRandomSpi

This class is a facade for the SHA1 Pseudo Random Number Generation algorithm.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SHA1PRNGHybrid()	Creates an instance of the SHA1PRNGHybrid class.
SHA1PRNGHybrid(byte[] seed)	Creates an instance of the SHA1PRNGHybrid class.

Method Summary

Modifier and Type	Method	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.
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.security.SecureRandomSpi

engineGetParameters, engineNextBytes, engineReseed, toString

Methods inherited from class java.lang.Object

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

Constructor Details

SHA1PRNGHybrid

public SHA1PRNGHybrid()

Creates an instance of the SHA1PRNGHybrid class.

SHA1PRNGHybrid

public SHA1PRNGHybrid(byte[] seed)

Creates an instance of the SHA1PRNGHybrid class.

Parameters:

seed - a series of bytes used as seed

Method Details

engineSetSeed

public void engineSetSeed(byte[] seed)
                   throws UnsupportedOperationException

Sets the seed value for the random number generator.

Specified by:

engineSetSeed in class SecureRandomSpi

Parameters:

seed - a series of bytes used as seed.

Throws:

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 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 SecureRandomSpi

Parameters:

numBytes - the size of the seed to generate

getGenerator

protected void getGenerator(byte[] seed)

Creates an instance of the SecureRandom.

Throws:

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

getBestInstance

public 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:

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