arlut.csd.Util

Class RandomUtils

java.lang.Object

arlut.csd.Util.RandomUtils

public class RandomUtils
extends java.lang.Object

This class contains a variety of utility static methods that deal in Random numbers for use in Ganymede.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.String	charsetA
private static java.lang.String	charsetAN
private static java.lang.String	charsetC
private static java.util.Random	randomizer
private static java.security.SecureRandom	secureRandomizer

Constructor Summary

Constructors

Constructor and Description
RandomUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.String	getRandomHex() This method returns a random 32 bit hex string, used to ensure that a string including it is random.
static java.lang.String	getRandomPassword(int length) Get a random password, using all characters, length chars long
static java.lang.String	getRandomString(int length, java.lang.String charset) Get a random string, using all characters from given charset, length chars long
static java.lang.String	getRandomUsername() Get a random username, 8 characters alpha-numeric, starting with an alphabetic character.
static java.lang.String	getSaltedString(java.lang.String in) This method takes a string, adds a random salt to it, and returns it.
static void	main(java.lang.String[] args) Test rig

Methods inherited from class java.lang.Object

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

Field Detail

randomizer

private static java.util.Random randomizer

secureRandomizer

private static java.security.SecureRandom secureRandomizer

charsetA

private static final java.lang.String charsetA

See Also:

Constant Field Values

charsetAN

private static final java.lang.String charsetAN

See Also:

Constant Field Values

charsetC

private static final java.lang.String charsetC

See Also:

Constant Field Values

Constructor Detail

RandomUtils

public RandomUtils()

Method Detail

getRandomHex

public static java.lang.String getRandomHex()

This method returns a random 32 bit hex string, used to ensure that a string including it is random.

The random number generator for this method is low security, and should not be used for cryptographic purposes where unpredictability is paramount.

getSaltedString

public static java.lang.String getSaltedString(java.lang.String in)

This method takes a string, adds a random salt to it, and returns it.

The random number generator for this method is low security, and should not be used for cryptographic purposes where unpredictability is paramount.

Generally, salts need not be unpredictable, as long as they are not often repeated.

getRandomString

public static java.lang.String getRandomString(int length,
                               java.lang.String charset)

Get a random string, using all characters from given charset, length chars long

getRandomUsername

public static java.lang.String getRandomUsername()

Get a random username, 8 characters alpha-numeric, starting with an alphabetic character.

getRandomPassword

public static java.lang.String getRandomPassword(int length)

Get a random password, using all characters, length chars long

main

public static void main(java.lang.String[] args)

Test rig