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xyn

Random Pass Gen

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Hi Guys.
I've got my members area but I wanted to make the forgotten passwords more secure, So i thought i'd make a random password generator. So I can add this into the users password under MD5 and then e-mail them the new password.

Is there any way of doing this?

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yes you can...
[code]$username = "user"; //current usrename ;
$part1 = split($username,3); // Splitting first three chars for the username... Out put is an array ;
$random_number = rand(2,78); // getting one random no between 2 to 78 ;
$string = $part1[0] . $random_number; //making one new string...
$newmd = md5($string); // MD5 encry of new string.
$newpass = split($newmd,12); // spliting result with 12 chars
$password = $newpass[0]; // use this $password to mail your user...[/code]

Let me know how it is....

Thank you,
Karthi keyan

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this is what I do:

[code]<?php
  //using pre-specified letters and numbers arrays to eliminate eL's and one's and Oh's and zero's
      $letters = array('a','b','c','d','e','f','g','h','j','k','m','n','p','q','r','s','t','u','v','x','y','z');
      $numbers = array('2','3','4','5','6','7','8','9');

        for ($i=0; $i<5; $i++) // Pick 5 random letters
        {
        $passwordArray[$i] = $letters[rand(0,count($letters))];
//$passwordArray[$i] = chr(rand(97,122));
        }
      for ($i=5; $i<8; $i++) // Pick 3 random numbers
{
        $passwordArray[$i] = $numbers[rand(0,count($numbers))];
//$passwordArray[$i] = chr(rand(48,57));
        }
      shuffle($passwordArray); //(put the 8 charecters in random order)
      $sendPassword = implode("",$passwordArray);
        // end create password

echo $sendPassword; // you can md5 this or e-mail it or encrypt it or whatever

?>[/code]

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Here is mine
8 characters of password

[code]
<?

$random_password=md5(uniqid(rand()));
$new_password=substr($random_password, 0, 8); // change here if you want more than 8 characters password

echo $new_password;

?>[/code]

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i wouldn't say md5() is as secure anymore. hash collision can occur depending on the prefixes you use.

why not try sha1() instead?

maybe you could do something like this...off the top of my head:
[code=php:0]
<?php
    //assume $oldPass is the md5() value of his old password in your database
    $string = date('U') . $username . $oldPass;
    echo 'New password is: ' . sha1($string, true);
?>
[/code]


You might want to use the algorithms the others have posted in this thread becuse mine is relatively simple but i would avoid md5()...but it's generally ok to use MD5 unless you know some REALLY nasty people who would REALLY want to get back at you for something :)

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Thanks guys!!

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