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https://github.com/sigmasternchen/jsPasswordChecker
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82
jsPasswordChecker.js
Normal file
82
jsPasswordChecker.js
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@ -0,0 +1,82 @@
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console.log("jsPasswordChecker");
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var PasswordChecker = function(policies) {
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this.policies = policies;
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}
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PasswordChecker.prototype.policies;
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PasswordChecker.prototype.check = function(password) {
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if (this.policies.minLength !== undefined)
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this.checkMinLength(password);
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if (this.policies.maxLength !== undefined)
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this.checkMaxLength(password);
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if (this.policies.containsNumbers !== undefined)
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this.checkContains(password, this.policies.containsNumbers, /[0-9]/g, "numbers");
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if (this.policies.containsLowerCaseLetters !== undefined)
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this.checkContains(password, this.policies.containsLowerCaseLetters, /[a-z]/g, "lowercase characters");
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if (this.policies.containsUpperCaseLetters !== undefined)
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this.checkContains(password, this.policies.containsUpperCaseLetters, /[A-Z]/g, "uppercase characters");
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if (this.policies.containsWhiteSpaces !== undefined)
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this.checkContains(password, this.policies.containsWhiteSpaces, /\s/g, "whitespaces");
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if (this.policies.containsSpecialCharacters !== undefined)
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this.checkContains(password, this.policies.containsSpecialCharacters, /[^a-zA-Z\d\s]/g, "special characters");
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if (this.policies.dictionary !== undefined)
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this.checkDictionary(password);
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if (this.policies.maxCharacterRepetition !== undefined)
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this.checkCharacterRepetition(password);
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}
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PasswordChecker.prototype.checkMinLength = function(password) {
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if (password.length < this.policies.minLength)
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throw "Password is too short.";
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}
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PasswordChecker.prototype.checkMaxLength = function(password) {
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if (password.length > this.policies.maxLength)
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throw "Password is too long.";
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}
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PasswordChecker.prototype.checkContains = function(password, attribute, regex, name) {
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var contains = password.match(regex);
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if (attribute === true && contains === null)
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throw "Password does not contain " + name + ".";
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if (attribute === false && contains !== null)
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throw "Password does contain " + name + ".";
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if (typeof attribute === "number" && attribute > contains.length)
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throw "Password contains too few " + name + ".";
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}
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PasswordChecker.prototype.checkDictionary = function(password) {
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var dictionary = this.policies.dictionary;
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if (typeof dictionary !== "object") // array
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dictionary = [dictionary];
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for (var i = 0; i < dictionary.length; i++) {
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if (password.toLowerCase().indexOf(dictionary[i].toLowerCase()) >= 0)
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throw "Password contains " + dictionary[i].toLowerCase();
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}
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}
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PasswordChecker.prototype.checkCharacterRepetition = function(password) {
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var repitition = this.policies.maxCharacterRepetition;
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if (password.length > 0 && repitition <= 1)
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return; // policies don't make any sense
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var currentChar = password.charAt(0);
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var currentRepitition = 1;
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for (var i = 1; i < password.length; i++) {
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var tmp = password.charAt(i);
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if (tmp === currentChar) {
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currentRepitition++;
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if (currentRepitition > repitition)
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throw "The password contains to many identical characters in a row.";
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} else {
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currentChar = tmp;
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currentRepitition = 1;
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}
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}
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}
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39
test.html
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39
test.html
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<!DOCTYPE html>
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<head>
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<script src="jsPasswordChecker.js"></script>
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<script src="testcases.js"></script>
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<script>
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window.onload = function() {
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for (var i = 0; i < testcases.length; i++) {
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var testcase = testcases[i];
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var checker = new PasswordChecker(testcase.policies);
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var result = true;
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var error = "success";
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try {
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checker.check(testcase.password);
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} catch (e) {
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result = false;
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error = e;
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}
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var el = document.createElement("div");
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el.innerHTML = "Test Case " + i + " "
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if (result != testcase.result) {
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el.style.color = "red";
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el.innerHTML += "failed (" + result + "; " + testcase.result + " expected)<br />";
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el.innerHTML += " Password: " + testcase.password + "; Policies: " + testcase.policies + "; result: " + error;
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} else {
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el.style.color = "green";
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el.innerHTML += "was successful.<br />";
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el.innerHTML += " Password: " + testcase.password + "; Policies: " + testcase.policies + "; result: " + error;
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}
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document.body.appendChild(el);
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}
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}
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</script>
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</head>
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<body>
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</body>
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251
testcases.js
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251
testcases.js
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console.log("testcases.js");
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var testcases = [
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{
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password: "test",
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policies: {
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minLength: 8
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},
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result: false
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},{
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password: "testtest",
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policies: {
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minLength: 8
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},
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result: true
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},{
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password: "test",
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policies: {
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maxLength: 8
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},
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result: true
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},{
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password: "testtest",
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policies: {
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maxLength: 7
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},
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result: false
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},{
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password: "test",
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policies: {
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containsNumbers: true
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},
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result: false
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},{
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password: "test",
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policies: {
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containsNumbers: false
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},
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result: true
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},{
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password: "test1",
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policies: {
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containsNumbers: true
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},
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result: true
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},{
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password: "test1",
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policies: {
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containsNumbers: false
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},
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result: false
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},{
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password: "test1",
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policies: {
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containsNumbers: 2
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},
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result: false
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},{
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password: "test11",
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policies: {
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containsNumbers: 2
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},
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result: true
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},{
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password: "test",
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policies: {
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containsLowerCaseLetters: true
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},
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result: true
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},{
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password: "test",
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policies: {
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containsLowerCaseLetters: false
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},
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result: false
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},{
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password: "TEST",
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policies: {
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containsLowerCaseLetters: true
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},
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result: false
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},{
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password: "TEST",
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policies: {
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containsLowerCaseLetters: false
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},
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result: true
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},{
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password: "tesT",
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policies: {
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containsUpperCaseLetters: true
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},
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result: true
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},{
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password: "tesT",
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policies: {
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containsUpperCaseLetters: false
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},
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result: false
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},{
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password: "test",
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policies: {
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containsUpperCaseLetters: true
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},
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result: false
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},{
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password: "test",
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policies: {
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containsUpperCaseLetters: false
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},
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result: true
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},{
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password: "test",
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policies: {
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containsSpecialCharacters: true
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},
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result: false
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},{
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password: "test",
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policies: {
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containsSpecialCharacters: false
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},
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result: true
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},{
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password: "test&",
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policies: {
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containsSpecialCharacters: true
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},
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result: true
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},{
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password: "test&",
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policies: {
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containsSpecialCharacters: false
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},
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result: false
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},{
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password: "test",
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policies: {
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containsWhiteSpaces: true
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},
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result: false
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},{
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password: "test",
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policies: {
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containsWhiteSpaces: false
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},
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result: true
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},{
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password: "te st",
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policies: {
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containsWhiteSpaces: true
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},
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result: true
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},{
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password: "te st",
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policies: {
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containsWhiteSpaces: false
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},
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result: false
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},{
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password: "teest",
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policies: {
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maxCharacterRepetition: 2
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},
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result: true
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},{
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password: "teeest",
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policies: {
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maxCharacterRepetition: 2
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},
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result: false
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},{
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password: "testUserName",
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policies: {
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dictionary: [
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"UserName"
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]
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},
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result: false
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},{
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password: "testUseName",
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policies: {
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dictionary: [
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"UserName"
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]
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},
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result: true
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},
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{
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password: "RealyG00d&Password",
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policies: {
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minLength: 10,
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containsLowerCaseLetters: true,
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containsUpperCaseLetters: true,
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containsNumbers: true,
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containsSpecialCharacters: true,
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maxCharacterRepetition: 2,
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dictionary: [
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"username",
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"1994"
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]
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},
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result: true
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},{
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password: "NotSoG00d&Password1994",
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policies: {
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minLength: 10,
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containsLowerCaseLetters: true,
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containsUpperCaseLetters: true,
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containsNumbers: true,
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containsSpecialCharacters: true,
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maxCharacterRepetition: 2,
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dictionary: [
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"username",
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"1994"
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]
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},
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result: false
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},{
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password: "NotSoG000d&Password",
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policies: {
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minLength: 10,
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containsLowerCaseLetters: true,
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containsUpperCaseLetters: true,
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containsNumbers: true,
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containsSpecialCharacters: true,
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maxCharacterRepetition: 2,
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dictionary: [
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"username",
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"1994"
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]
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},
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result: false
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},{
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password: "NotSoG00dPassword",
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policies: {
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minLength: 10,
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containsLowerCaseLetters: true,
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containsUpperCaseLetters: true,
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containsNumbers: true,
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containsSpecialCharacters: true,
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maxCharacterRepetition: 2,
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dictionary: [
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"username",
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"1994"
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]
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},
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result: false
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}
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]
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