https://royallib.com/js/password_strength_plugin.js

1/**
2 * password_strength_plugin.js
3 * Copyright (c) 2009 myPocket technologies (www.mypocket-technologies.com)
4 
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14
15 * View the GNU General Public License <http://www.gnu.org/licenses/>.
16
17 * @author Darren Mason ([email protected])
18 * @date 1/23/2009
19 * @projectDescription Password Strength Meter is a jQuery plug-in provide you smart algorithm to detect a password strength. Based on Firas Kassem orginal plugin - http://phiras.wordpress.com/2007/04/08/password-strength-meter-a-jquery-plugin/
20 * @version 1.0.0
21 * 
22 * @requires jquery.js (tested with 1.3.1)
23 * @param shortPass:    "shortPass",    //optional
24 * @param badPass:              "badPass",              //optional
25 * @param goodPass:             "goodPass",             //optional
26 * @param strongPass:   "strongPass",   //optional
27 * @param baseStyle:    "testresult",   //optional
28 * @param userid:               "",                             //required override
29 * @param messageloc:   1                               //before == 0 or after == 1
30 * 
31*/
32
33(function($){ 
34        $.fn.shortPass = 'Слишком короткий пароль';
35        $.fn.badPass = 'Слабый пароль';
36        $.fn.goodPass = 'Нормальный пароль';
37        $.fn.strongPass = 'Сильный пароль';
38        $.fn.samePassword = 'Имя пользователя и пароль идентичны.';
39        $.fn.resultStyle = "";
40        
41         $.fn.passStrength = function(options) {  
42          
43                 var defaults = {
44                                shortPass:              "shortPass",    //optional
45                                badPass:                "badPass",              //optional
46                                goodPass:               "goodPass",             //optional
47                                strongPass:             "strongPass",   //optional
48                                baseStyle:              "testresult",   //optional
49                                userid:                 "",                             //required override
50                                messageloc:             1                               //before == 0 or after == 1
51                        }; 
52                        var opts = $.extend(defaults, options);  
53                      
54                        return this.each(function() { 
55                                 var obj = $(this);
56
57                                $(obj).keyup(function()
58                                {
59
60                                        var results = $.fn.teststrength($(this).val(),$(opts.userid).val(),opts);
61                                        
62                                        if(opts.messageloc === 1)
63                                        {
64                                                $(this).next("." + opts.baseStyle).remove();
65                                                $(this).after("<b class=\""+opts.baseStyle+"\"><span></span></b>");
66                                                $(this).next("." + opts.baseStyle).addClass($(this).resultStyle).find("span").text(results);
67                                        }
68                                        else
69                                        {
70                                                $(this).prev("." + opts.baseStyle).remove();
71                                                $(this).before("<b class=\""+opts.baseStyle+"\"><span></span></b>");
72                                                $(this).prev("." + opts.baseStyle).addClass($(this).resultStyle).find("span").text(results);
73                                        }
74                                 });
75                                 
76                                //FUNCTIONS
77                                $.fn.teststrength = function(password,username,option){
78                                                var score = 0; 
79                                            
80                                            //password < 4
81                                            if (password.length < 4 ) { this.resultStyle =  option.shortPass;return $(this).shortPass; }
82                                            
83                                            //password == user name
84                                            if (password.toLowerCase()==username.toLowerCase()){this.resultStyle = option.badPass;return $(this).samePassword;}
85                                            
86                                            //password length
87                                            score += password.length * 4;
88                                            score += ( $.fn.checkRepetition(1,password).length - password.length ) * 1;
89                                            score += ( $.fn.checkRepetition(2,password).length - password.length ) * 1;
90                                            score += ( $.fn.checkRepetition(3,password).length - password.length ) * 1;
91                                            score += ( $.fn.checkRepetition(4,password).length - password.length ) * 1;
92                        
93                                            //password has 3 numbers
94                                            if (password.match(/(.*[0-9].*[0-9].*[0-9])/)){ score += 5;} 
95                                            
96                                            //password has 2 symbols
97                                            if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~].*[!,@,#,$,%,^,&,*,?,_,~])/)){ score += 5 ;}
98                                            
99                                            //password has Upper and Lower 

99chars
100                                            if (password.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/)){  score += 10;} 
101                                            
102                                            //password has number and chars
103                                            if (password.match(/([a-zA-Z])/) && password.match(/([0-9])/)){  score += 15;} 
104                                            //
105                                            //password has number and symbol
106                                            if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([0-9])/)){  score += 15;} 
107                                            
108                                            //password has char and symbol
109                                            if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([a-zA-Z])/)){score += 15;}
110                                            
111                                            //password is just a numbers or chars
112                                            if (password.match(/^\w+$/) || password.match(/^\d+$/) ){ score -= 10;}
113                                            
114                                            //verifying 0 < score < 100
115                                            if ( score < 0 ){score = 0;} 
116                                            if ( score > 100 ){  score = 100;} 
117                                            
118                                            if (score < 34 ){ this.resultStyle = option.badPass; return $(this).badPass;} 
119                                            if (score < 68 ){ this.resultStyle = option.goodPass;return $(this).goodPass;}
120                                            
121                                           this.resultStyle= option.strongPass;
122                                            return $(this).strongPass;
123                                            
124                                };
125                  
126                  });  
127         };  
128})(jQuery); 
129
130
131$.fn.checkRepetition = function(pLen,str) {
132        var res = "";
133     for (var i=0; i<str.length ; i++ ) 
134     {
135         var repeated=true;
136         
137         for (var j=0;j < pLen && (j+i+pLen) < str.length;j++){
138             repeated=repeated && (str.charAt(j+i)==str.charAt(j+i+pLen));
139             }
140         if (j<pLen){repeated=false;}
141         if (repeated) {
142             i+=pLen-1;
143             repeated=false;
144         }
145         else {
146             res+=str.charAt(i);
147         }
148     }
149     return res;
150        };