[Javascript] Regarding Password Validation

[Håkan Magnusson]

I'm sorry for the delay, it's been a busy week. However, I did some
polishing and finished it up, and I think this is the regexp you are
looking for:

//--
var rxPassword = new
RegExp(/(([\d].*[\d].*[^\w])|([^\w].*[\d].*[\d])|([\d].*[^\w].*[\d]))+/);
var sPassword = new String();

sPassword = 'bhf97ax'; // Should be false, missing special character
alert('Should be false: ' + rxPassword.test(sPassword));

sPassword = '6list!'; // Should be false, not enough numbers
alert('Should be false: ' + rxPassword.test(sPassword));

sPassword = '!!AN6RY!!'; // Should be false, not enough numbers
alert('Should be false: ' + rxPassword.test(sPassword));

sPassword = 'i:rt66'; // Should be true
alert('Should be true: ' + rxPassword.test(sPassword));

sPassword = '9!9opa<'; // Should be true
alert('Should be true: ' + rxPassword.test(sPassword));

sPassword = '=7ddd7'; // Should be true
alert('Should be true: ' + rxPassword.test(sPassword));
//--

Make sure that the RegExp declaration is all on one line, I'm afraid
mail viewers might break it since it's pretty long. :) If I find ways to
optimize it further, I'll let you know.

Regards,
H


Ramachandran wrote:
> Hi Hakan,
> 
> Yes i really need the Regular Expression for these conditions. If u find
> time...please write and send it to me...
> 
> 
> 
> -----Original Message-----
> From: javascript-bounces at LaTech.edu
> [mailto:javascript-bounces at LaTech.edu]On Behalf Of Hakan Magnusson
> Sent: Monday, March 01, 2004 9:06 PM
> To: [JavaScript List]
> Subject: Re: [Javascript] Regarding Password Validation
> 
> 
> Ramachandran,
> This could be accomplished with only one regexp, of course.
> 
> My regexp skills are not quite up to date, but something that vaugely
> resembles this line should probably work:
> 
> /[0-9]{2,}[^a-zA-Z0-9]{1,}/
> 
> You can then test your password field value against the regexp, and it
> will return true if the password has at least two numbers and one
> special character.
> 
> Again, my regexp skills are not very hot. Someone who do know the ins
> and outs of regexps can build this for you in the blink of an eye, this
> regexp is NOT complicated. If you really need me to, I can build it for
> you when I have the time.
> 
> Dave,
> I don't know about 'missing 80% of the power of JavaScript', regexps
> have nothing to do with JavaScript. Saying that someone who doesn't know
> regexps are missing 80% of the power of string manipulation/testing
> sounds more accurate to me. ;)
> 
> H
> 
> 
> David Lovering wrote:
> 
> 
>>The easiest way I can think of is to use two regular expression filters to
>>strip (respectively) everything out EXCEPT numbers, and everything out
>>EXCEPT special characters.  The output of these two filters are put into
> 
> two
> 
>>strings, such as
>>
>>var digitString;
>>var specialString;
>>
>>... and then simply check the length of the two strings to make sure that
>>they are greater than or equal to 2 and 1, again respectively.
>>
>>If you're not up on regular expression filters, you're missing about 80%
> 
> of
> 
>>the power of JavaScript (at least IMO).
>>
>>Try
>>
>>  var re0 = /[^0-9]/g;
>>  var re1 = /[a-zA-Z0-9]/g;
>>
>>  var digitString = myString.replace(re0, "");
>>  var specialString = myString.replace(re1, "");
>>
>>  alert("number of digits: " + digitString.length);
>>  alert("number of special characters: " + specialString.length);
>>
>>Or some variation thereof.  Incidently, I'd also check myString (the
> 
> target
> 
>>string coming in) for total length as well, as short strings are easy to
>>crack.
>>
>>-- Dave Lovering
>>----- Original Message -----
>>From: "Ramachandran" <ramachandran at summitworks.com>
>>To: "[JavaScript List]" <javascript at LaTech.edu>
>>Sent: Monday, March 01, 2004 6:42 AM
>>Subject: [Javascript] Regarding Password Validation
>>
>>
>>
>>
>>>Hi all,
>>>
>>>I want to perform a validation in password field. The validation includes
>>>the following conditions.
>>>
>>>1. It should contain atleast two no.s and once special characters.
>>>
>>>How can i do this one..
>>>
>>>Regards,
>>>Ram
>>>
>>>_______________________________________________
>>>Javascript mailing list
>>>Javascript at LaTech.edu
>>>https://lists.LaTech.edu/mailman/listinfo/javascript
>>>
>>>
>>
>>
>>
>>_______________________________________________
>>Javascript mailing list
>>Javascript at LaTech.edu
>>https://lists.LaTech.edu/mailman/listinfo/javascript
>>
>>
> 
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