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/* global owaspPasswordStrengthTest, TextEncoder, crypto, fetch */
(function () {
'use strict'
const PasswordValidator = function (passwordField, repeatedPasswordField) {
if (
passwordField === null || passwordField === undefined ||
repeatedPasswordField === null || repeatedPasswordField === undefined
) {
return
}
this.passwordField = passwordField
this.repeatedPasswordField = repeatedPasswordField
this.fetchDomNodes()
this.bindEvents()
this.currentStrengthLevel = 0
this.errors = []
}
const FEEDBACK_SUCCESS = 'success'
const FEEDBACK_WARNING = 'warning'
const FEEDBACK_ERROR = 'error'
const ICON_SUCCESS = 'glyphicon-ok'
const ICON_WARNING = 'glyphicon-warning-sign'
const ICON_ERROR = 'glyphicon-remove'
const VALIDATION_SUCCESS = 'has-success'
const VALIDATION_WARNING = 'has-warning'
const VALIDATION_ERROR = 'has-error'
const STRENGTH_PROGRESS_0 = 'progress-bar-danger level-0'
const STRENGTH_PROGRESS_1 = 'progress-bar-danger level-1'
const STRENGTH_PROGRESS_2 = 'progress-bar-warning level-2'
const STRENGTH_PROGRESS_3 = 'progress-bar-success level-3'
const STRENGTH_PROGRESS_4 = 'progress-bar-success level-4'
/**
* Prefetch all dom nodes at initialisation in order to gain time at execution since DOM manipulations
* are really time consuming
*/
PasswordValidator.prototype.fetchDomNodes = function () {
this.form = this.passwordField.closest('form')
this.disablePasswordChecks = this.passwordField.classList.contains('disable-password-checks')
this.passwordGroup = this.passwordField.closest('.form-group')
this.passwordFeedback = this.passwordGroup.querySelector('.form-control-feedback')
this.passwordStrengthMeter = this.passwordGroup.querySelector('.progress-bar')
this.passwordHelpText = this.passwordGroup.querySelector('.help-block')
this.repeatedPasswordGroup = this.repeatedPasswordField.closest('.form-group')
this.repeatedPasswordFeedback = this.repeatedPasswordGroup.querySelector('.form-control-feedback')
}
PasswordValidator.prototype.bindEvents = function () {
this.passwordField.addEventListener('focus', this.resetPasswordFeedback.bind(this))
this.passwordField.addEventListener('keyup', this.instantFeedbackForPassword.bind(this))
this.repeatedPasswordField.addEventListener('keyup', this.validateRepeatedPassword.bind(this))
this.passwordField.addEventListener('blur', this.validatePassword.bind(this))
}
/**
* Events Listeners
*/
PasswordValidator.prototype.resetPasswordFeedback = function () {
this.errors = []
this.resetValidation(this.passwordGroup)
this.resetFeedbackIcon(this.passwordFeedback)
if (!this.disablePasswordChecks) {
this.displayPasswordErrors()
this.instantFeedbackForPassword()
}
}
/**
* Validate password on the fly to provide the user a visual strength meter
*/
PasswordValidator.prototype.instantFeedbackForPassword = function () {
const passwordStrength = this.getPasswordStrength(this.passwordField.value)
const strengthLevel = this.getStrengthLevel(passwordStrength)
if (this.currentStrengthLevel === strengthLevel) {
return
}
this.currentStrengthLevel = strengthLevel
this.updateStrengthMeter()
if (this.repeatedPasswordField.value !== '') {
this.updateRepeatedPasswordFeedback()
}
}
/**
* Validate password and display the error(s) message(s)
*/
PasswordValidator.prototype.validatePassword = function () {
this.errors = []
const password = this.passwordField.value
if (!this.disablePasswordChecks) {
const passwordStrength = this.getPasswordStrength(password)
this.currentStrengthLevel = this.getStrengthLevel(passwordStrength)
if (passwordStrength.errors) {
this.addPasswordError(passwordStrength.errors)
}
this.checkLeakedPassword(password).then(this.handleLeakedPasswordResponse.bind(this))
}
this.setPasswordFeedback()
}
/**
* Validate the repeated password upon typing
*/
PasswordValidator.prototype.validateRepeatedPassword = function () {
this.updateRepeatedPasswordFeedback()
}
/**
* User Feedback manipulators
*/
/**
* Update the strength meter based on OWASP feedback
*/
PasswordValidator.prototype.updateStrengthMeter = function () {
this.resetStrengthMeter()
this.passwordStrengthMeter.classList.add.apply(
this.passwordStrengthMeter.classList,
this.tokenize(this.getStrengthLevelProgressClass())
)
}
PasswordValidator.prototype.setPasswordFeedback = function () {
const feedback = this.getFeedbackFromLevel()
this.updateStrengthMeter()
this.displayPasswordErrors()
this.setFeedbackForField(feedback, this.passwordField)
}
/**
* Update the repeated password feedback icon and color
*/
PasswordValidator.prototype.updateRepeatedPasswordFeedback = function () {
const feedback = this.checkPasswordFieldsEquality() ? FEEDBACK_SUCCESS : FEEDBACK_ERROR
this.setFeedbackForField(feedback, this.repeatedPasswordField)
}
/**
* Display the given feedback on the field
* @param {string} feedback success|error|warning
* @param {HTMLElement} field
*/
PasswordValidator.prototype.setFeedbackForField = function (feedback, field) {
const formGroup = this.getFormGroupElementForField(field)
const visualFeedback = this.getFeedbackElementForField(field)
this.resetValidation(formGroup)
this.resetFeedbackIcon(visualFeedback)
visualFeedback.classList.remove('hidden')
visualFeedback.classList
.add
.apply(
visualFeedback.classList,
this.tokenize(this.getFeedbackIconClass(feedback))
)
formGroup.classList
.add
.apply(
formGroup.classList,
this.tokenize(this.getValidationClass(feedback))
)
}
/**
* Password Strength Helpers
*/
/**
* Get OWASP feedback on the given password. Returns false if the password is empty
* @param password
* @returns {object|false}
*/
PasswordValidator.prototype.getPasswordStrength = function (password) {
if (password === '') {
return false
}
return owaspPasswordStrengthTest.test(password)
}
/**
* Get the password strength level based on password strength feedback object given by OWASP
* @param passwordStrength
* @returns {number}
*/
PasswordValidator.prototype.getStrengthLevel = function (passwordStrength) {
if (passwordStrength === false) {
return 0
}
if (passwordStrength.requiredTestErrors.length !== 0) {
return 1
}
if (passwordStrength.strong === false) {
return 2
}
if (passwordStrength.isPassphrase === false || passwordStrength.optionalTestErrors.length !== 0) {
return 3
}
return 4
}
PasswordValidator.prototype.LEVEL_TO_FEEDBACK_MAP = [
FEEDBACK_ERROR,
FEEDBACK_ERROR,
FEEDBACK_WARNING,
FEEDBACK_SUCCESS,
FEEDBACK_SUCCESS
]
/**
* @returns {string}
*/
PasswordValidator.prototype.getFeedbackFromLevel = function () {
return this.LEVEL_TO_FEEDBACK_MAP[this.currentStrengthLevel]
}
PasswordValidator.prototype.LEVEL_TO_PROGRESS_MAP = [
STRENGTH_PROGRESS_0,
STRENGTH_PROGRESS_1,
STRENGTH_PROGRESS_2,
STRENGTH_PROGRESS_3,
STRENGTH_PROGRESS_4
]
/**
* Get the CSS class for the meter based on the current level
*/
PasswordValidator.prototype.getStrengthLevelProgressClass = function () {
return this.LEVEL_TO_PROGRESS_MAP[this.currentStrengthLevel]
}
PasswordValidator.prototype.addPasswordError = function (error) {
this.errors.push(...(Array.isArray(error) ? error : [error]))
}
PasswordValidator.prototype.displayPasswordErrors = function () {
// Erase the error list content
while (this.passwordHelpText.firstChild) {
this.passwordHelpText.removeChild(this.passwordHelpText.firstChild)
}
// Add the errors in the stack to the DOM
this.errors.map((error) => {
const text = document.createTextNode(error)
const paragraph = document.createElement('p')
paragraph.appendChild(text)
this.passwordHelpText.appendChild(paragraph)
})
}
PasswordValidator.prototype.FEEDBACK_TO_ICON_MAP = []
PasswordValidator.prototype.FEEDBACK_TO_ICON_MAP[FEEDBACK_SUCCESS] = ICON_SUCCESS
PasswordValidator.prototype.FEEDBACK_TO_ICON_MAP[FEEDBACK_WARNING] = ICON_WARNING
PasswordValidator.prototype.FEEDBACK_TO_ICON_MAP[FEEDBACK_ERROR] = ICON_ERROR
/**
* @param success|error|warning feedback
*/
PasswordValidator.prototype.getFeedbackIconClass = function (feedback) {
return this.FEEDBACK_TO_ICON_MAP[feedback]
}
PasswordValidator.prototype.FEEDBACK_TO_VALIDATION_MAP = []
PasswordValidator.prototype.FEEDBACK_TO_VALIDATION_MAP[FEEDBACK_SUCCESS] = VALIDATION_SUCCESS
PasswordValidator.prototype.FEEDBACK_TO_VALIDATION_MAP[FEEDBACK_WARNING] = VALIDATION_WARNING
PasswordValidator.prototype.FEEDBACK_TO_VALIDATION_MAP[FEEDBACK_ERROR] = VALIDATION_ERROR
/**
* @param success|error|warning feedback
*/
PasswordValidator.prototype.getValidationClass = function (feedback) {
return this.FEEDBACK_TO_VALIDATION_MAP[feedback]
}
/**
* Validators
*/
/**
* Check if both password fields are equal
* @returns {boolean}
*/
PasswordValidator.prototype.checkPasswordFieldsEquality = function () {
return this.passwordField.value === this.repeatedPasswordField.value
}
/**
* Check if the password is leaked
* @param password
*/
PasswordValidator.prototype.checkLeakedPassword = function (password) {
const url = 'https://api.pwnedpasswords.com/range/'
return new Promise(function (resolve, reject) {
this.sha1(password).then((digest) => {
const preFix = digest.slice(0, 5)
let suffix = digest.slice(5, digest.length)
suffix = suffix.toUpperCase()
return fetch(url + preFix)
.then(function (response) {
return response.text()
})
.then(function (data) {
resolve(data.indexOf(suffix) > -1)
})
.catch(function (err) {
reject(err)
})
})
}.bind(this))
}
PasswordValidator.prototype.handleLeakedPasswordResponse = function (hasPasswordLeaked) {
if (hasPasswordLeaked === true) {
this.currentStrengthLevel--
this.addPasswordError('This password was exposed in a data breach. Please use a more secure alternative one!')
}
this.setPasswordFeedback()
}
/**
* CSS Classes reseters
*/
PasswordValidator.prototype.resetValidation = function (el) {
const tokenizedClasses = this.tokenize(
VALIDATION_ERROR,
VALIDATION_WARNING,
VALIDATION_SUCCESS
)
el.classList.remove.apply(
el.classList,
tokenizedClasses
)
}
PasswordValidator.prototype.resetFeedbackIcon = function (el) {
const tokenizedClasses = this.tokenize(
ICON_ERROR,
ICON_WARNING,
ICON_SUCCESS
)
el.classList.remove.apply(
el.classList,
tokenizedClasses
)
}
PasswordValidator.prototype.resetStrengthMeter = function () {
const tokenizedClasses = this.tokenize(
STRENGTH_PROGRESS_1,
STRENGTH_PROGRESS_2,
STRENGTH_PROGRESS_3,
STRENGTH_PROGRESS_4
)
this.passwordStrengthMeter.classList.remove.apply(
this.passwordStrengthMeter.classList,
tokenizedClasses
)
}
/**
* Helpers
*/
PasswordValidator.prototype.getFormGroupElementForField = function (field) {
if (field === this.passwordField) {
return this.passwordGroup
}
if (field === this.repeatedPasswordField) {
return this.repeatedPasswordGroup
}
}
PasswordValidator.prototype.getFeedbackElementForField = function (field) {
if (field === this.passwordField) {
return this.passwordFeedback
}
if (field === this.repeatedPasswordField) {
return this.repeatedPasswordFeedback
}
}
/**
* Returns an array of strings ready to be applied on classList.add or classList.remove
* @returns {string[]}
*/
PasswordValidator.prototype.tokenize = function () {
const tokenArray = []
for (const i in arguments) {
tokenArray.push(arguments[i])
}
return tokenArray.join(' ').split(' ')
}
PasswordValidator.prototype.sha1 = function (str) {
const buffer = new TextEncoder('utf-8').encode(str)
return crypto.subtle.digest('SHA-1', buffer).then((hash) => {
return this.hex(hash)
})
}
PasswordValidator.prototype.hex = function (buffer) {
const hexCodes = []
const view = new DataView(buffer)
for (let i = 0; i < view.byteLength; i += 4) {
const value = view.getUint32(i)
const stringValue = value.toString(16)
const padding = '00000000'
const paddedValue = (padding + stringValue).slice(-padding.length)
hexCodes.push(paddedValue)
}
return hexCodes.join('')
}
new PasswordValidator(
document.getElementById('password'),
document.getElementById('repeat_password')
)
})()
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