NeoEGM.com » Password

PHP random password generator

NeoEGM — Thu, 23 Jul 2009 08:10:31 +0000

As a new sequel to the Excel random password generator and the Random password generator, I’ve made a PHP random password generator service…

You can call it this way (if you hover the parameter values, you’ll get an explanation):

http://www.neoegm.com/services/random_password.php?length=8&upper=1&lower=1&numbers=1

So, for example, to generate a 10 characters numeric password you could access:

http://www.neoegm.com/services/random_password.php?length=10&upper=0&lower=0

That’s all, now the code for the ones who want to use it on their own sites (read below for license)…

Download .PHP File

The code is licensed under the GNU GPL v3…

Anyway, here is the code so you can watch it without having to download the PHP file:

function make_seed()	//Function make_seed from http://www.php.net/manual/en/function.srand.php
{
  list($usec, $sec) = explode(' ', microtime());
  return (float) $sec + ((float) $usec * 100000);
}

function RandomPassword($length, $upper = true, $numbers = true, $lower = true)
{
	if (!$upper && !$lower && !$numbers)
		return "";

	$ret = "";

	$chars = 26 * 2 + 10;	//26 (a-z) + 26 (A-Z) + 10 (0-9)
		//a-z = 97-122
		//A-Z = 65-90
		//0-9 = 48-57

	srand(make_seed());		//Seed with microseconds
							//if you don't need this, you can just use srand(time());

	for ($i = 1; $i <= $length; $i++)
	{
		$repeat = false;

		$num = floor(rand(0, $chars-1));

		if ($num < 26)
			if ($lower)
				$ret .= chr($num + 97);
			else
				$repeat = true;
		else if ($num < 52)
			if ($upper)
				$ret .= chr($num - 26 + 65);
			else
				$repeat = true;
		else if ($num < 62)
			if ($numbers)
				$ret .= chr($num - 52 + 48);
			else
				$repeat = true;

		if ($repeat)
			$i--;
	}

	return $ret;
}

And this is the code needed to make it a web service:

$length = isset($_REQUEST['length'])?$_REQUEST['length']:8;
$upper = isset($_REQUEST['upper'])?$_REQUEST['upper']:true;
$numbers = isset($_REQUEST['numbers'])?$_REQUEST['numbers']:true;
$lower = isset($_REQUEST['lower'])?$_REQUEST['lower']:true;

if ($length < 1 || $length > 128)
	$length = 8;

if (!($upper == false || $upper == 0))
	$upper = true;

if (!($numbers == false || $numbers == 0))
	$numbers = true;

if (!($lower == false || $lower == 0))
	$lower = true;

echo RandomPassword($length, $upper, $numbers, $lower);

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NeoEGM — Thu, 23 Jul 2009 01:41:49 +0000

As an easy and quick to use alternative to the Excel random password generator, I’ve made this online Javascript adaptation of the random password generation function code… You can watch its source code below…

Characters

Uppercase
Lowercase
Numbers

Random Password

The code is licensed under the GNU GPL v3…

Just in case you want to see the function code without looking into the source code:

/************************************************************************************************* Random Password Generator by NeoEGM Copyright (C) 2009 Ezequiel Gastón Miravalles This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 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 more details. You should have received a copy of the GNU General Public License along with this program. If not, see . *************************************************************************************************/ /************************************************************************************************* Software: Random Password Generator by NeoEGM Author: Ezequiel Gastón Miravalles Website: http://www.neoegm.com/software/random-password-generator/ License: GNU GPL v3 (read above) *************************************************************************************************/ function RandomPassword(Length, Upper, Numbers, Lower) { Upper = typeof(Upper) != 'undefined' ? Upper : true; Numbers = typeof(Numbers) != 'undefined' ? Numbers : true; Lower = typeof(Lower) != 'undefined' ? Lower : true; if (!Upper && !Lower && !Numbers) return ""; var Ret = ""; var Num; var Repeat; Chars = 26 * 2 + 10; //26 (a-z) + 26 (A-Z) + 10 (0-9) //a-z = 97-122 //A-Z = 65-90 //0-9 = 48-57 for (i = 1; i <= Length; i++) { Repeat = false; Num = Math.floor(Math.random()*Chars); if (Num < 26) if (Lower) Ret = Ret + String.fromCharCode(Num + 97); else Repeat = true; else if (Num < 52) if (Upper) Ret = Ret + String.fromCharCode(Num - 26 + 65); else Repeat = true; else if (Num < 62) if (Numbers) Ret = Ret + String.fromCharCode(Num - 52 + 48); else Repeat = true; if (Repeat) i--; } return Ret; }

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NeoEGM — Wed, 22 Jul 2009 17:42:22 +0000

Sometimes you may have to generate automatically different random passwords. This could be a very easy task if you just had an Excel function like “RandomPassword”, so you could write:

=RandomPassword(8)

And get something like:

e8NwB9Bi

Well, this is exactly the idea of the Add-In I’ve made…

If this isn’t what you’re looking for, as an alternative, you can visit the online random password generator.

The function syntax is as follows:

=RandomPassword(length, [uppercase = TRUE], [numbers = TRUE], [lowercase = TRUE])

Just as simple as that… Here are the download links:

XLAM Add-in (Excel 2007)

Sample XLSX (Excel 2007)

XLA Add-in (Excel 2003)

Sample XLS (Excel 2003)

If you don’t know how you should install an Excel Add-in, keep looking into the site since I’ll write a post about that soon… By now, I can give you this guidelines:

1- Copy the corresponding version of the add-in (XLA or XLAM) to C:\Program Files\Microsoft Office\OfficeXX\Library (where XX is the Office version, being 12 for Office 2007)
2- Follow the instructions given here for Office 2003 or below, or take a look at the first part of this steps for Office 2007.

The code is licensed under the GNU GPL v3…

Just in case you want to see the function code without looking into the add-in:

Function RandomPassword(Length As Integer, Optional Upper As Boolean = True, Optional Number As Boolean = True, Optional Lower As Boolean = True) If Not Upper And Not Lower And Not Number Then RandomPassword = ""; Exit Function End If Dim Ret As String Dim Num As Integer Dim Repeat As Boolean Randomize Chars = 26 * 2 + 10 '26 (a-z) + 26 (A-Z) + 10 (0-9) 'a-z = 97-122 'A-Z = 65-90 '0-9 = 48-57 For i = 1 To Length Repeat = False Num = Int(Chars * Rnd) 'Int((upperbound - lowerbound + 1) * Rnd + lowerbound) If Num < 26 Then 'a-z If Lower Then Ret = Ret & Chr(Num + 97) Else Repeat = True End If ElseIf Num < 52 Then 'A-Z If Upper Then Ret = Ret & Chr(Num - 26 + 65) Else Repeat = True End If ElseIf Num < 62 Then '0-9 If Number Then Ret = Ret & Chr(Num - 52 + 48) Else Repeat = True End If End If If Repeat Then i = i - 1 End If Next i RandomPassword = Ret End Function

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