mirror of
https://git.code.sf.net/p/seeddms/code
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277 lines
8.5 KiB
PHP
277 lines
8.5 KiB
PHP
<?php
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/*************************************************************************
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* password_strength.class.php *
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*************************************************************************
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* *
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* (c) 2008-2011 Wolf Software Limited <support@wolf-software.com> *
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* All Rights Reserved. *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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*************************************************************************/
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class Password_Strength {
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private $class_name = "password strength";
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private $class_version = "1.0.0";
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private $class_author = "wolf software";
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private $class_source = "http://www.wolf-software.com/downloads/php-classes/security-classes/password-strength-class/";
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private $password = '';
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private $password_info = array();
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private $password_length = 0;
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private $score_precision = 2;
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public function class_name() {
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return $this->class_name;
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}
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public function class_version() {
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return $this->class_version;
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}
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public function class_author() {
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return $this->class_author;
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}
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public function class_source() {
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return $this->class_source;
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}
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public function __construct() {
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}
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public function simple_calculate() {
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$password = $this->password;
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$score = 0;
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if(preg_match('/[0-9]+/', $password))
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$score += 25;
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if(preg_match('/[a-z]+/', $password))
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$score += 25;
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if(preg_match('/[A-Z]+/', $password))
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$score += 25;
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if(preg_match('/[^0-9a-zA-Z]+/', $password))
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$score += 25;
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if($this->password_length < 8)
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$score *= ($this->password_length/8);
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$this->password_info['total_score'] = $score;
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$this->password_info['rating_score'] = $score;
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$this->password_info['rating'] = $this->get_score_info($score);
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}
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public function calculate() {
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$this->password_info = array();
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$this->password_info['password'] = $this->password;
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$this->password_info['password_length'] = $this->password_length;
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if($this->password_length == 0) {
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$this->password_info['total_score'] = 0;
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$this->password_info['rating_score'] = 0;
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$this->password_info['rating'] = 'Very Bad';
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return;
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}
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$this->calculate_length();
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$this->calculate_complexity();
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$this->calculate_charset_complexity();
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$this->calculate_entropy();
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$total = 0;
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$scoreCount = 0;
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$keys = array_keys($this->password_info['details']);
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foreach ($keys as $key) {
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if (preg_match('/score+$/', $key)) {
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$total += intval($this->password_info['details'][$key]);
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$scoreCount ++;
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}
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}
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$rating_score = round($total / $scoreCount, $this->score_precision);
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$score_info = $this->get_score_info($rating_score);
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$this->password_info['total_score'] = $total;
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$this->password_info['rating_score'] = $rating_score;
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$this->password_info['rating'] = $score_info;
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ksort($this->password_info);
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ksort($this->password_info['details']);
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}
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public function get_all_info() {
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return $this->password_info;
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}
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public function get_score() {
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return $this->password_info['rating_score'];
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}
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public function get_rating() {
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return $this->password_info['rating'];
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}
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public function set_password($password) {
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$this->password = $password;
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$this->password_length = strlen($password);
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}
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private function calculate_charset_complexity() {
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$password = $this->password;
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$len = strlen($password);
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$char = '';
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$last_char = '';
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$different_count = 0;
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$score = 0;
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if ($len <= 3) {
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$score = 2;
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} else {
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for ($i = 0; $i < $len; $i++) {
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$char = substr($password, $i, 1);
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if ($i > 0) {
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$last_char = substr($password, $i - 1, 1);
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}
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if ($char != $last_char) {
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$different_count++;
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}
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}
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if ($len <= 5) {
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$score = 10;
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} elseif ($different_count == 1) {
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$score = 1;
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$this->password_info['details']['length_score'] = min(min(floor(10 * $this->password_length / 10), 20), $this->password_info['details']['length_score']);
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} elseif ($different_count == 2) {
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$score = 5;
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$this->password_info['details']['length_score'] = min(min(floor(20 * $this->password_length / 10), 40), $this->password_info['details']['length_score']);
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} elseif ($different_count == 3) {
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$score = 10;
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$this->password_info['details']['length_score'] = min(min(floor(30 * $this->password_length / 10), 50), $this->password_info['details']['length_score']);
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} else {
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$score = round(max($this->password_info['details']['length_score'] / 10, $different_count / $len * 100), $this->score_precision);
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}
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}
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$this->password_info['details']['charset_complexity_score'] = $score;
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}
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private function calculate_complexity() {
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$password = $this->password;
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$score = 0;
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if (preg_match('/^([0-9]+)+$/', $password)) {
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$score = 10;
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$this->password_info['details']['charset'] = 'numeric';
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} elseif (preg_match('/^([a-z]+)+$/', $password)) {
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$score = 30;
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$this->password_info['details']['charset'] = 'alphabetic';
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} elseif (preg_match('/^([a-z0-9]+)+$/i', $password)) {
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if ((preg_match('/^([a-z]+)([0-9]+)+$/i', $password, $match)) || (preg_match('/^([0-9]+)([a-z]+)+$/i', $password, $match))) {
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$alpha = $match[1];
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$numeric = $match[2];
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$numeric_length = strlen($numeric);
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if (($numeric == 111) || ($numeric == 123)) {
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if (preg_match('/^([a-z]+)([0-9]+)+$/i', $password, $match)) {
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$score = 31;
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} else {
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$score = 35;
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}
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$this->password_info['details']['common_numeric'] = true;
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} elseif ($numeric_length == 1) {
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$score = 30;
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} elseif ($numeric_length <= 3) {
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$score = 35;
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} elseif ($numeric_length <= 5) {
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$score = 40;
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} elseif ($numeric_length <= 10) {
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$score = 50;
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} else {
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$score = 60;
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}
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$this->password_info['details']['charset'] = 'alphanumeric';
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} else {
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$score = 80;
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$this->password_info['details']['charset'] = 'alphanumeric';
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}
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} else {
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$score = 100;
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$this->password_info['details']['charset'] = 'alphanumeric + others';
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}
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$this->password_info['details']['charset_score'] = $score;
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}
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private function calculate_length() {
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$len = $this->password_length;
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$score = 0;
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if ($len == 0) {
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$score = 0;
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} elseif ($len <= 3) {
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$score = 1;
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} elseif ($len <= 4) {
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$score = 2;
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} elseif ($len <= 5) {
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$score = 10;
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} elseif ($len <= 6) {
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$score = 20;
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} elseif ($len <= 8) {
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$score = 30;
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} elseif ($len <= 10) {
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$score = 45;
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} elseif ($len <= 15) {
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$score = 75;
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} elseif ($len <= 18) {
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$score = 80;
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} elseif ($len <= 20) {
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$score = 90;
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} else {
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$score = 100;
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}
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$this->password_info['details']['length_score'] = $score;
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}
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private function calculate_entropy() {
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$score = 0;
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$password = $this->password;
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$length = $this->password_length;
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foreach (count_chars($password, 1) as $v) {
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$p = $v / $length;
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$score -= $p * log($p)/log(2);
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}
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$this->password_info['details']['entropy_per_character'] = round($score, $this->score_precision);
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$this->password_info['details']['entropy_score'] = round(($score * $length), $this->score_precision);
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}
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private function get_score_info($score) {
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if ($score <= 15) {
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$score_info = 'Very Bad';
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} elseif ($score <= 35) {
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$score_info = 'Bad';
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} elseif ($score <= 45) {
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$score_info = 'Medium - Bad';
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} elseif ($score <= 55) {
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$score_info = 'Medium';
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} elseif ($score <= 65) {
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$score_info = 'Medium - Good';
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} elseif ($score <= 75) {
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$score_info = 'Good';
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} elseif ($score <= 90) {
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$score_info = 'Very Good';
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} else {
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$score_info = 'Excellent';
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}
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return $score_info;
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}
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}
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