A default implementation for password strength validation. More...

Inheritance diagram for Wt::Auth::PasswordStrengthValidator:

Public Types
Public Types inherited from Wt::WValidator
Public Types inherited from Wt::WObject
typedef void(WObject::*	Method) ()
	Typedef for a WObject method without arguments.

Public Member Functions
	PasswordStrengthValidator ()
	Default constructor.

void	setMinimumLength (PasswordType type, int length)
	Sets the minimum length for a password of a certain type. More...

int	minimumLength (PasswordType type)
	Returns the minimum length for a password of a certain type. More...

void	setMinimumPassPhraseWords (int words)
	Sets the minimum number of words for a pass phrase. More...

int	minimumPassPhraseWords () const
	Returns the minimum number of words for a pass phrase. More...

void	setMinimumMatchLength (int length)
	Sets the minimum length for a match against a known sequence or the login name / email address. More...

int	minimumMatchLength () const
	Returns the minimum length for a match against a known sequence. More...

virtual AbstractPasswordService::StrengthValidatorResult	evaluateStrength (const WString &password, const WString &loginName, const std::string &email) const
	Evaluates the strength of a password. More...

Public Member Functions inherited from Wt::Auth::AbstractPasswordService::AbstractStrengthValidator
virtual Result	validate (const WString &password, const WString &loginName, const std::string &email) const
	Validates a password. More...

virtual Result	validate (const WString &password) const
	Validates a password. More...

Public Member Functions inherited from Wt::WValidator
	WValidator (WObject *parent=0)
	Creates a new validator.

	WValidator (bool mandatory, WObject *parent=0)
	Creates a new validator. More...

	~WValidator ()
	Destructor. More...

void	setMandatory (bool how)
	Sets if input is mandatory. More...

bool	isMandatory () const
	Returns if input is mandatory.

void	setInvalidBlankText (const WString &text)
	Sets the message to display when a mandatory field is left blank. More...

WString	invalidBlankText () const
	Returns the message displayed when a mandatory field is left blank. More...

virtual WString	format () const
	Returns the validator format. More...

virtual void	createExtConfig (std::ostream &config) const
	Provides Ext-compatible config options for client-side validation.

virtual std::string	javaScriptValidate () const
	Creates a Javascript object that validates the input. More...

virtual std::string	inputFilter () const
	Returns a regular expression that filters input. More...

Public Member Functions inherited from Wt::WObject
	WObject (WObject *parent=0)
	Create a WObject with a given parent object. More...

virtual	~WObject ()
	Destructor. More...

virtual const std::string	id () const
	Returns the (unique) identifier for this object. More...

virtual void	setObjectName (const std::string &name)
	Sets an object name. More...

virtual std::string	objectName () const
	Returns the object name. More...

void	resetLearnedSlots ()
	Resets learned stateless slot implementations. More...

template<class T >
void	resetLearnedSlot (void(T::*method)())
	Resets a learned stateless slot implementation. More...

template<class T >
WStatelessSlot *	implementStateless (void(T::*method)())
	Declares a slot to be stateless and learn client-side behaviour on first invocation. More...

template<class T >
WStatelessSlot *	implementStateless (void(T::method)(), void(T::undoMethod)())
	Declares a slot to be stateless and learn client-side behaviour in advance. More...

void	isNotStateless ()
	Marks the current function as not stateless. More...

template<class T >
WStatelessSlot *	implementJavaScript (void(T::*method)(), const std::string &jsCode)
	Provides a JavaScript implementation for a method. More...

void	addChild (WObject *child)
	Adds a child object. More...

virtual void	removeChild (WObject *child)
	Removes a child object. More...

const std::vector< WObject * > &	children () const
	Returns the children.

WObject *	parent () const
	Returns the parent object.

Static Public Attributes
static const int	Disabled = std::numeric_limits<int>::max()
	Sentinel value to disable a particular check.

Additional Inherited Members
Protected Member Functions inherited from Wt::WObject
virtual WStatelessSlot *	getStateless (Method method)
	On-demand stateless slot implementation. More...

Static Protected Member Functions inherited from Wt::WObject
static WObject *	sender ()
	Returns the sender of the current slot call. More...

Detailed Description

A default implementation for password strength validation.

This implementation uses http://www.openwall.com/passwdqc/, a password checker commonly used to validate user account passwords in Linux/BSD distributions.

The default settings are not as restrictive as those used originally by passwdqc (which could be frustratingly restrictive for a web application). You may want to make it change the settings to demand stronger passwords for sensitive applications.

Member Enumeration Documentation

enum Wt::Auth::PasswordStrengthValidator::PasswordType

Enumeration for a password type.

An entered password will be classified as one of these types, based on the different characters used.

The classification uses the concept of character classes, and defines five classes:

lower case letters
upper case letters
numbers
other ascii characters
unknowns (i.e. multi-byte UTF-8 sequences)

For determining the number of classes, capitializaiton of the first letter of a word, or appending a number, does not count as an extra class.

Enumerator
OneCharClass	A password with characters of only one class. The default minimum length required for this password type is 20 characters. Note the default of passwdqc is Disabled
TwoCharClass	A password with characters of two classes. The default minimum length required for this password type is 15 characters. Note the default of passwdqc is 24 characters
PassPhrase	A password that consists of multiple words. The default minimum length required for this password type is 11 characters. See also setMinimumPassPhraseWords() Note the default of passwdqc is also 11 characters
ThreeCharClass	A password with characters of three classes. The default minimum length required for this password type is 8 characters. Note the default of passwdqc is also 8 characters
FourCharClass	A password with characters of four classes. The default minimum length required for this password type is 7 characters. Note the default of passwdqc is also 7 characters

Member Function Documentation

AbstractPasswordService::StrengthValidatorResult Wt::Auth::PasswordStrengthValidator::evaluateStrength	(	const WString &	password,
		const WString &	loginName,
		const std::string &	email
	)		const

virtual

Evaluates the strength of a password.

The result is an instance of StrengthValidatorResult which contains information on the validity and the strength (0 if invalid, 5 if valid) of the password together with possible messages.

The validator takes into account the user's login name and email address, to exclude passwords that are too similar to these.

Implements Wt::Auth::AbstractPasswordService::AbstractStrengthValidator.

int Wt::Auth::PasswordStrengthValidator::minimumLength ( PasswordType type )

Returns the minimum length for a password of a certain type.

See also: setMinimumLength()

int Wt::Auth::PasswordStrengthValidator::minimumMatchLength ( ) const

Returns the minimum length for a match against a known sequence.

See also: setMinimumMatchLength()

int Wt::Auth::PasswordStrengthValidator::minimumPassPhraseWords ( ) const

Returns the minimum number of words for a pass phrase.

See also: setMinimumPassPhraseWords()

void Wt::Auth::PasswordStrengthValidator::setMinimumLength	(	PasswordType	type,
		int	length
	)

Sets the minimum length for a password of a certain type.

See the PasswordType documentation for defaults. You may disable a password of a certain class entirely using the special value Disabled.

void Wt::Auth::PasswordStrengthValidator::setMinimumMatchLength ( int length )

Sets the minimum length for a match against a known sequence or the login name / email address.

Irrespective of other settings, a password may be checked not to contain common sequences.

This sets the minimum number of characters which is considered as a match of a password against a known sequence. A lower length setting is thus more stringent.

The default value is 4.

void Wt::Auth::PasswordStrengthValidator::setMinimumPassPhraseWords ( int words )

Sets the minimum number of words for a pass phrase.

Sets the minimum number of words for a valid pass phrase.

The default value is 3.

See also: PassPhrase

Public Types

Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Member Function Documentation