iaik.utils

Class PasswordGenerator

java.lang.Object

iaik.utils.PasswordGenerator

public final class PasswordGenerator
extends java.lang.Object

Password generator for generating secure random passwords. The PasswordGenerator allows the user to choose the character sets, by using bitmasks created from the following constants:

• USE_CHARS_LOWER stands for including lower characters.
• USE_CHARS_UPPER stands for including upper characters.
• USE_NUMBERS stands for including digits.
• USE_SPECIAL_BASIC stands for including characters such as ".-_".
• USE_SPECIAL_EXTENDED stands for including characters such as "!\"$%&/()=?{[]}\\`*+~#'^<>'".

Here is an example:

PasswordGenerator gen = new PasswordGenerator(); String password = gen.generate(20, USE_CHARS_LOWER | USE_CHARS_UPPER | USE_SPECIAL_BASIC);

This creates a password of length 20 consisting of lower characters, upper characters as well as characters of the set ".-_".

See Also:

PasswordStrengthChecker

Field Summary

Fields

Modifier and Type	Field and Description
static int	USE_ALL Use lower, upper, special and extended special characters plus numbers.
static int	USE_CHARS_LOWER Use lower case characters.
static int	USE_CHARS_UPPER Use upper case characters.
static int	USE_NUMBERS Use numbers.
static int	USE_SPECIAL_BASIC Use basic special characters.
static int	USE_SPECIAL_EXTENDED Use extended special characters.

Constructor Summary

Constructors

Constructor and Description
PasswordGenerator() Instantiates a new password generator.
PasswordGenerator(java.security.SecureRandom random) Instantiates a new password generator.

Method Summary

Methods

Modifier and Type	Method and Description
char[]	generate(int length) Generate a random password using all available characters.
char[]	generate(int length, int usedSymbolMask) Generate a random password.
char[]	generate(int length, int usedSymbolMask, java.lang.String additionalChars) Generate a random password.
char[]	generateCharOnly(int length) Generate a random password using lower and upper case characters only.
char[]	generateNumberOnly(int length) Generate a random password containing numbers only.

Methods inherited from class java.lang.Object

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

Field Detail

USE_CHARS_LOWER

public static final int USE_CHARS_LOWER

Use lower case characters.

See Also:

Constant Field Values

USE_CHARS_UPPER

public static final int USE_CHARS_UPPER

Use upper case characters.

See Also:

Constant Field Values

USE_NUMBERS

public static final int USE_NUMBERS

Use numbers.

See Also:

Constant Field Values

USE_SPECIAL_BASIC

public static final int USE_SPECIAL_BASIC

Use basic special characters.

See Also:

Constant Field Values

USE_SPECIAL_EXTENDED

public static final int USE_SPECIAL_EXTENDED

Use extended special characters.

See Also:

Constant Field Values

USE_ALL

public static final int USE_ALL

Use lower, upper, special and extended special characters plus numbers.

See Also:

Constant Field Values

Constructor Detail

PasswordGenerator

public PasswordGenerator(java.security.SecureRandom random)

Instantiates a new password generator.

Parameters:

random - the PRNG to be used

PasswordGenerator

public PasswordGenerator()

Instantiates a new password generator.

Method Detail

generate

public char[] generate(int length,
              int usedSymbolMask,
              java.lang.String additionalChars)

Generate a random password.

Parameters:

length - the length of the password

usedSymbolMask - the used symbols

additionalChars - additional characters to be included

Returns:

the password string

generate

public char[] generate(int length,
              int usedSymbolMask)

Generate a random password.

Parameters:

length - the length of the password

usedSymbolMask - the used symbols

Returns:

the password string

generate

public char[] generate(int length)

Generate a random password using all available characters.

Parameters:

length - the length of the password

Returns:

the password string

generateCharOnly

public char[] generateCharOnly(int length)

Generate a random password using lower and upper case characters only.

Parameters:

length - the length of the password

Returns:

the password string

generateNumberOnly

public char[] generateNumberOnly(int length)

Generate a random password containing numbers only.

Parameters:

length - the length of the password

Returns:

the password string