+ − /*
+ − * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
+ − * Copyright (C) 2006-2007 Dan Fuhry
+ − * pwstrength - Password evaluation and strength testing algorithm
+ − *
+ − * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
+ − * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
+ − *
+ − * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ − * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
+ − */
+ −
+ − function password_score_len(password)
+ − {
+ − if ( typeof(password) != "string" )
+ − {
+ − return -10;
+ − }
+ − var len = password.length;
+ − var score = len - 7;
+ − return score;
+ − }
+ −
+ − function password_score(password)
+ − {
+ − if ( typeof(password) != "string" )
+ − {
+ − return -10;
+ − }
+ − var score = 0;
+ − var debug = [];
+ − // length check
+ − var lenscore = password_score_len(password);
+ −
+ − debug.push(''+lenscore+' points for length');
+ −
+ − score += lenscore;
+ −
+ − var has_upper_lower = false;
+ − var has_symbols = false;
+ − var has_numbers = false;
+ −
+ − // contains uppercase and lowercase
+ − if ( password.match(/[A-z]+/) && password.toLowerCase() != password )
+ − {
+ − score += 1;
+ − has_upper_lower = true;
+ − debug.push('1 point for having uppercase and lowercase');
+ − }
+ −
+ − // contains symbols
+ − if ( password.match(/[^A-z0-9]+/) )
+ − {
+ − score += 1;
+ − has_symbols = true;
+ − debug.push('1 point for having nonalphanumeric characters (matching /[^A-z0-9]+/)');
+ − }
+ −
+ − // contains numbers
+ − if ( password.match(/[0-9]+/) )
+ − {
+ − score += 1;
+ − has_numbers = true;
+ − debug.push('1 point for having numbers');
+ − }
+ −
+ − if ( has_upper_lower && has_symbols && has_numbers && password.length >= 9 )
+ − {
+ − // if it has uppercase and lowercase letters, symbols, and numbers, and is of considerable length, add some serious points
+ − score += 4;
+ − debug.push('4 points for having uppercase and lowercase, numbers, and nonalphanumeric and being more than 8 characters');
+ − }
+ − else if ( has_upper_lower && has_symbols && has_numbers && password.length >= 6 )
+ − {
+ − // still give some points for passing complexity check
+ − score += 2;
+ − debug.push('2 points for having uppercase and lowercase, numbers, and nonalphanumeric');
+ − }
+ − else if(( ( has_upper_lower && has_symbols ) ||
+ − ( has_upper_lower && has_numbers ) ||
+ − ( has_symbols && has_numbers ) ) && password.length >= 6 )
+ − {
+ − // if 2 of the three main complexity checks passed, add a point
+ − score += 1;
+ − debug.push('1 point for having 2 of 3 complexity checks');
+ − }
+ − else if ( ( !has_upper_lower && !has_numbers && has_symbols ) ||
+ − ( !has_upper_lower && !has_symbols && has_numbers ) ||
+ − ( !has_numbers && !has_symbols && has_upper_lower ) )
+ − {
+ − score += -2;
+ − debug.push('-2 points for only meeting 1 complexity check');
+ − }
+ − else if ( password.match(/^[0-9]*?([a-z]+)[0-9]?$/) )
+ − {
+ − // password is something like magnum1 which will be cracked in seconds
+ − score += -4;
+ − debug.push('-4 points for being of the form [number][word][number], which is easily cracked');
+ − }
+ − else if ( !has_upper_lower && !has_numbers && !has_symbols )
+ − {
+ − // this is if somehow the user inputs a password that doesn't match the rule above, but still doesn't contain upper and lowercase, numbers, or symbols
+ − debug.push('-3 points for not meeting any complexity checks');
+ − score += -3;
+ − }
+ −
+ − //
+ − // Repetition
+ − // Example: foobar12345 should be deducted points, where f1o2o3b4a5r should be given points
+ − // None of the positive ones kick in unless the length is at least 8
+ − //
+ −
+ − if ( password.match(/([A-Z][A-Z][A-Z][A-Z]|[a-z][a-z][a-z][a-z])/) )
+ − {
+ − debug.push('-2 points for having more than 4 letters of the same case in a row');
+ − score += -2;
+ − }
+ − else if ( password.match(/([A-Z][A-Z][A-Z]|[a-z][a-z][a-z])/) )
+ − {
+ − debug.push('-1 points for having more than 3 letters of the same case in a row');
+ − score += -1;
+ − }
+ − else if ( password.match(/[A-z]/) && !password.match(/([A-Z][A-Z][A-Z]|[a-z][a-z][a-z])/) && password.length >= 8 )
+ − {
+ − debug.push('1 point for never having more than 2 letters of the same case in a row');
+ − score += 1;
+ − }
+ −
+ − if ( password.match(/[0-9][0-9][0-9][0-9]/) )
+ − {
+ − debug.push('-2 points for having 4 or more numbers in a row');
+ − score += -2;
+ − }
+ − else if ( password.match(/[0-9][0-9][0-9]/) )
+ − {
+ − debug.push('-1 points for having 3 or more numbers in a row');
+ − score += -1;
+ − }
+ − else if ( has_numbers && !password.match(/[0-9][0-9][0-9]/) && password.length >= 8 )
+ − {
+ − debug.push('1 point for never more than 2 numbers in a row');
+ − score += -1;
+ − }
+ −
+ − // make passwords like fooooooooooooooooooooooooooooooooooooo totally die by subtracting a point for each character repeated at least 3 times in a row
+ − var prev_char = '';
+ − var warn = false;
+ − var loss = 0;
+ − for ( var i = 0; i < password.length; i++ )
+ − {
+ − var chr = password.substr(i, 1);
+ − if ( chr == prev_char && warn )
+ − {
+ − loss += -1;
+ − }
+ − else if ( chr == prev_char && !warn )
+ − {
+ − warn = true;
+ − }
+ − else if ( chr != prev_char && warn )
+ − {
+ − warn = false;
+ − }
+ − prev_char = chr;
+ − }
+ − if ( loss < 0 )
+ − {
+ − debug.push(''+loss+' points for immediate character repetition');
+ − score += loss;
+ − // this can bring the score below -10 sometimes
+ − if ( score < -10 )
+ − {
+ − debug.push('Score set to -10 because it went below that floor');
+ − score = -10;
+ − }
+ − }
+ −
+ − var debug_txt = "<b>How this score was calculated</b>\nYour score was tallied up based on an extensive algorithm which outputted\nthe following scores based on traits of your password. Above you can see the\ncomposite score; your individual scores based on certain tests are below.\n\nThe scale is open-ended, with a minimum score of -10. 10 is very strong, 4\nis strong, 1 is good and -3 is fair. Below -3 scores \"Weak.\"\n\n";
+ − for ( var i = 0; i < debug.length; i++ )
+ − {
+ − debug_txt += debug[i] + "\n";
+ − }
+ −
+ − // For users that really want to know why their password sucks.
+ − // Not localized because the feature is really only used for debugging the algorithm.
+ − if ( document.getElementById('passdebug') )
+ − document.getElementById('passdebug').innerHTML = debug_txt;
+ −
+ − return score;
+ − }
+ −
+ − function password_score_draw(score)
+ − {
+ − if ( !$lang )
+ − {
+ − // $lang isn't initted yet, this happens sometimes on the usercp/emailpassword form.
+ − // Try to init it if we have ENANO_LANG_ID and enano_lang; if not, report an error.
+ − load_component('l10n');
+ − if ( typeof(enano_lang) == 'object' && typeof(ENANO_LANG_ID) == 'number' )
+ − {
+ − language_onload();
+ − }
+ − else
+ − {
+ − return {
+ − 'color' : '#000000',
+ − 'fgcolor' : '#666666',
+ − 'str' : 'Language init failed'
+ − };
+ − }
+ − }
+ − // some colors are from the Gmail sign-up form
+ − if ( score >= 10 )
+ − {
+ − var color = '#010101';
+ − var fgcolor = '#666666';
+ − var str = $lang.get('usercp_pwstrength_score_verystrong', { score: score });
+ − }
+ − else if ( score > 3 )
+ − {
+ − var color = '#008000';
+ − var fgcolor = '#004000';
+ − var str = $lang.get('usercp_pwstrength_score_strong', { score: score });
+ − }
+ − else if ( score >= 1 )
+ − {
+ − var color = '#6699cc';
+ − var fgcolor = '#4477aa';
+ − var str = $lang.get('usercp_pwstrength_score_good', { score: score });
+ − }
+ − else if ( score >= -3 )
+ − {
+ − var color = '#f5ac00';
+ − var fgcolor = '#ffcc33';
+ − var str = $lang.get('usercp_pwstrength_score_fair', { score: score });
+ − }
+ − else
+ − {
+ − var color = '#aa0033';
+ − var fgcolor = '#FF6060';
+ − var str = $lang.get('usercp_pwstrength_score_weak', { score: score });
+ − }
+ − var ret = {
+ − color: color,
+ − fgcolor: fgcolor,
+ − str: str
+ − };
+ − return ret;
+ − }
+ −
+ − function password_score_field(field)
+ − {
+ − var indicator = false;
+ − if ( field.nextSibling )
+ − {
+ − if ( field.nextSibling.className == 'password-checker' )
+ − {
+ − indicator = field.nextSibling;
+ − }
+ − }
+ − if ( !indicator )
+ − {
+ − var indicator = document.createElement('span');
+ − indicator.className = 'password-checker';
+ − if ( field.nextSibling )
+ − {
+ − field.parentNode.insertBefore(indicator, field.nextSibling);
+ − }
+ − else
+ − {
+ − field.parentNode.appendChild(indicator);
+ − }
+ − }
+ − var score = password_score(field.value);
+ − var data = password_score_draw(score);
+ − indicator.style.color = data.color;
+ − indicator.style.fontWeight = 'bold';
+ − indicator.innerHTML = ' ' + data.str;
+ −
+ − if ( document.getElementById('pwmeter') )
+ − {
+ − var div = document.getElementById('pwmeter');
+ − div.style.width = '250px';
+ − score += 10;
+ − if ( score > 25 )
+ − score = 25;
+ − div.style.backgroundColor = data.color;
+ − var width = Math.round( score * (250 / 25) );
+ − div.innerHTML = '<div style="width: '+width+'px; background-color: '+data.fgcolor+'; height: 8px;"></div>';
+ − }
+ − }
+ −