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标题: 新人献礼3：password generator [打印本页]

作者: 周星星1832 时间: 12-2-2009 13:30
标题: 新人献礼3：password generator
<?php
/************************************************************************/
/* Password.classphp                                                 */
/* =====================================================================*/
/* Copyright (c) 2008 by fumin lu                                     */
/*                                                                   */
/* Author(s): fumin lu                                                 */
/* =====================================================================*/
/* Title:                                                             */
/*    Random Password Generating Class take some Conditions when    */
/*    generating the Password                                     */
/* Date: Jan sec, 2008                                              */
/* =====================================================================*/

// Class Declaration Starts:
class Password{

var $PasswordLength; // Variable To Assign Password Length
var $caps = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
var $small= 'abcdefghjkmnpqrstuvwxyz';
var $nums = '0123456789';
var $all  = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz0123456789';
      var $condition;
var $minLen;

function Password($passLen,$condition)
{ //Constructor To Assign Values
      $this->condition = $condition;  // Will Store the Condition Array to Global Variable
      // Will calculate the Minimum Length
      $this->minLen = $this->condition['caps']+$this->condition['small']+$this->condition['nums'];
      // Compute the Total Password Length and Store it to the Global Variable
      $this->PasswordLength = max($this->minLen, $passLen);
      $this->condition['all']=$this->PasswordLength-$this->minLen;
}

function PassGen()
{
      $password_array_position=array();
      $password_array=array();
      for($i=1;$i<$this->PasswordLength+1;$i++)
      {
         $password_array_position[$i]=$i;
      }

      if($this->condition['caps']>0)
      {

         $this->get_chars('caps',$password_array,$password_array_position);
      }
      if($this->condition['small']>0)
      {
         $this->get_chars('small',$password_array,$password_array_position);

      }
      if($this->condition['nums']>0)
      {

         $this->get_chars('nums',$password_array,$password_array_position);


      }

      if($this->condition['all'])
      {
         $this->get_chars('all',$password_array,$password_array_position);
      }
      ksort($password_array);
      return str_shuffle(implode($password_array,''));
}

function get_chars($type,&$password_array,&$password_array_position)
{
      for($i=0;$i<$this->condition[$type];$i++)
      {
         $position=array_rand($password_array_position,1);
         $password_array[$position]= $this->get_char($this->);
         $password_array_position=array_diff($password_array_position,array($position=>$position));
      }

}

function PassCheck($pass)
{ // Function To Check Whether the Password have those Conditions
      $cond = array('caps'=>0, 'small'=>0, 'nums'=>0);
      for ($i=0;$i<strlen($pass);$i++)
      {
         $c = substr($pass, $i, 1);
         if (strpos($this->caps, $c)) { $cond['caps']++; }
         if (strpos($this->small, $c)) { $cond['small']++; }
         if (strpos($this->nums, $c)) { $cond['nums']++; }

      }
      if ($this->condition['caps']<=$cond['caps'] && $this->condition['small']<=$cond['small'] && $this->condition['nums']<=$cond['nums'] )
      {
         return true;
      }
      else
      {
         return false;
      }
}

function get_char($set)
{

      list($usec, $sec) = explode(' ', microtime());
      $seed= (float) $sec + ((float) $usec * 100000);
      mt_srand($seed);
      $num = mt_rand() % strlen($set);
      $char = substr(str_shuffle($set), $num, 1);
      return $char;
}
}
?>

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