Package de.christofreichardt.jca.shamir

Class PasswordGenerator

java.lang.Object

de.christofreichardt.jca.shamir.PasswordGenerator

All Implemented Interfaces:

de.christofreichardt.diagnosis.Traceable

public class PasswordGenerator
extends Object
implements de.christofreichardt.diagnosis.Traceable

Generates passwords with specified length and basic character set.

Author:

Christof Reichardt

Constructor Summary

Constructors

Constructor	Description
PasswordGenerator(int length)	Creates a PasswordGenerator instance with the specified length and alphanumeric symbols as basic character set.
PasswordGenerator(int length, char[] symbols)	Creates a PasswordGenerator instance with the specified length and given basic character set.

Method Summary

Modifier and Type	Method	Description
static char[]	all()	The union of all specific character sets (alphanumeric, umlauts, punctuationAndSymbols).
static char[]	alphanumeric()	Defines the character set comprising alphanumeric symbols.
static char[]	alphanumericWithPunctuationAndSymbols()	The union of alphanumeric and punctuationAndSymbols() punctuationAndSymbol} characters.
static char[]	alphanumericWithUmlauts()	The union of alphanumeric and umlaut characters.
Stream<CharSequence>	generate()	Generates a stream of passwords which will be built from the basic character set with the specified length.
Stream<CharSequence>	generate(char[] requiredChars)	Generates a stream of passwords which will be built from the basic character set with the specified length.
Stream<CharSequence>	generate(Set<char[]> requiredCharSets)	Generates a stream of passwords which will be built from the basic character set with the specified length.
de.christofreichardt.diagnosis.AbstractTracer	getCurrentTracer()	Switched off.
static char[]	punctuationAndSymbols()	Defines the character set comprising several punctuation marks and symbols.
static char[]	umlauts()	Defines the character set comprising german umlauts.

Methods inherited from class java.lang.Object

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

Constructor Detail

PasswordGenerator

public PasswordGenerator(int length)
                  throws GeneralSecurityException

Creates a PasswordGenerator instance with the specified length and alphanumeric symbols as basic character set.

Parameters:

length - the length of the generated passwords

Throws:

GeneralSecurityException - if no provider supports the required SecureRandom instance

PasswordGenerator

public PasswordGenerator(int length,
                         char[] symbols)
                  throws GeneralSecurityException

Creates a PasswordGenerator instance with the specified length and given basic character set.

Parameters:

length - the length of the generated passwords

symbols - the basic character set from which the passwords will be generated

Throws:

GeneralSecurityException - if no provider supports the required SecureRandom instance

Method Detail

alphanumeric

public static char[] alphanumeric()

Defines the character set comprising alphanumeric symbols.

Returns:

all alphanumeric characters

umlauts

public static char[] umlauts()

Defines the character set comprising german umlauts.

Returns:

all german umlauts

punctuationAndSymbols

public static char[] punctuationAndSymbols()

Defines the character set comprising several punctuation marks and symbols.

Returns:

some punctuation marks and symbols

alphanumericWithUmlauts

public static char[] alphanumericWithUmlauts()

The union of alphanumeric and umlaut characters.

Returns:

all alphanumeric characters and all german umlauts

alphanumericWithPunctuationAndSymbols

public static char[] alphanumericWithPunctuationAndSymbols()

The union of alphanumeric and punctuationAndSymbols() punctuationAndSymbol} characters.

Returns:

all alphanumeric characters and some punctuation marks and symbols

all

public static char[] all()

The union of all specific character sets (alphanumeric, umlauts, punctuationAndSymbols).

Returns:

all of them

generate

public Stream<CharSequence> generate()

Generates a stream of passwords which will be built from the basic character set with the specified length.

Returns:

a password stream

generate

public Stream<CharSequence> generate(char[] requiredChars)

Generates a stream of passwords which will be built from the basic character set with the specified length. All of the generated passwords will contain at least one of the required characters.

Parameters:

requiredChars - each generated password contains at least one of them

Returns:

a password stream

generate

public Stream<CharSequence> generate(Set<char[]> requiredCharSets)

Generates a stream of passwords which will be built from the basic character set with the specified length. All of the generated passwords will contain at least one of the characters of each required character set.

Parameters:

requiredCharSets - each generated password contains at least one character of each required character set

Returns:

a password stream

getCurrentTracer

public de.christofreichardt.diagnosis.AbstractTracer getCurrentTracer()

Switched off.

Specified by:

getCurrentTracer in interface de.christofreichardt.diagnosis.Traceable

Returns:

the NullTracer