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diff --git a/src/leap/bitmask_js/app/lib/validate.js b/src/leap/bitmask_js/app/lib/validate.js
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+// https://github.com/dropbox/zxcvbn
+
+var DOMAIN_RE = /^((?:(?:(?:\w[\.\-\+]?)*)\w)+)((?:(?:(?:\w[\.\-\+]?){0,62})\w)+)\.(\w{2,6})$/
+var USER_RE = /^[a-z0-9_-]{1,200}$/
+var USER_INT_RE = /^[\.@a-z0-9_-]*$/
+
+//
+// Validations returns an error message or false if no errors
+//
+
+class Validations {
+
+ domain(input) {
+ if (!input.match(DOMAIN_RE)) {
+ return "Not a domain name"
+ } else {
+ return null
+ }
+ }
+
+ usernameInteractive(input) {
+ if (!input.match(USER_INT_RE)) {
+ return "Username contains an invalid character"
+ }
+ return false
+ }
+
+ username(input) {
+ if (!input.match(USER_INT_RE)) {
+ return "Username contains an invalid character"
+ }
+ if (!input.match('@')) {
+ return "Username must be in the form username@domain"
+ }
+ let parts = input.split('@')
+ let userpart = parts[0]
+ let domainpart = parts[1]
+ if (!userpart.match(USER_RE)) {
+ return "Username contains an invalid character"
+ } else if (!domainpart.match(DOMAIN_RE)) {
+ return "Username must include a valid domain name."
+ }
+ return false
+ }
+
+ passwordStrength(passwd) {
+ if (typeof(zxcvbn) == 'function') {
+ // zxcvbn performs very slow on long strings, so we cap
+ // the calculation at 30 characters
+ return zxcvbn(passwd.substring(0,30))
+ } else {
+ return null
+ }
+ }
+
+ //
+ // loads the zxcvbn library. because this library is big, we don't load it
+ // every time, just when needed.
+ //
+ // this is the webpack way to do this:
+ //
+ // require.ensure([], function () {
+ // var zxcvbn = require('zxcvbn');
+ // });
+ //
+ // that works, but requires that we also process the original coffeescript
+ // source if we want to avoid warning messages.
+ //
+ loadPasswdLib(onload) {
+ var id = "zxcvbn-script"
+ if (!document.getElementById(id)) {
+ var script = document.createElement('script')
+ script.id = id
+ script.onload = onload
+ script.src = './js/zxcvbn.js'
+ document.getElementsByTagName('script')[0].appendChild(script)
+ }
+ }
+}
+
+var Validate = new Validations()
+export default Validate