I would like to increase password security for customer and admin accounts in Magento. In addition to minimum password length, contain uppercase, lowercase, special characters, and digits.

I found the JavaScript file that controls the validation. Path:js/prototype/validation.js (Screenshot and code attached) What is the appropriate code to be added?

enter image description here

 ['validate-password', 'Please enter 8 or more characters. Leading or trailing spaces will be ignored.', function(v) {
            var pass=v.strip(); /*strip leading and trailing spaces*/
            return !(pass.length>0 && pass.length < 8);
['validate-admin-password', 'Please enter 7 or more characters. Password should contain both numeric and alphabetic characters.', function(v) {
            var pass=v.strip();
            if (0 == pass.length) {
                return true;
            if (!(/[a-z]/i.test(v)) || !(/[0-9]/.test(v))) {
                return false;
            return !(pass.length < 7);

Thank you in advance for your help.

2 Answers 2


You can use below regular expression.


Explanation of this expression is

(?=.*\d)                //should contain at least one digit
(?=.*[a-z])             //should contain at least one lower case
(?=.*[A-Z])             //should contain at least one upper case
[a-zA-Z0-9]{8,}         //should contain at least 8 from the mentioned characters

You can replace line

 return !(pass.length>0 && pass.length < 8);


if (!(/^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])([a-zA-Z0-9]{8,})$/.test(pass))) {
        return false;
return true;

And change error message related to expression. You can do same for admin password.

For special character you can use below regular expression.

Minimum 8 characters at least 1 Uppercase Alphabet, 1 Lowercase Alphabet, 1 Number and 1 Special Character from amongst these $@$!%*?&#^ .


You can use it like this way

if (!(/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&#^])([A-Za-z\d$@$!%*?&#^]{8,})$/.test(pass))) {
     return false;
return true;
  • Thank you Akhilesh. How can we incorporate the special characters as well?
    – Elvis
    Commented Sep 24, 2015 at 21:08
  • I have edited my answer for special characters. Commented Sep 26, 2015 at 2:48
  • Thanks bro! Take my Upvote!!!
    – ItsJhonny
    Commented Jul 23, 2019 at 10:41

Please note that if you wish to use the "Send Auto Generated Password" found in the customers admin page you will need to update the "generatePassword" function found in "app/code/core/Mage/Customer/Model/Customer.php". Obvs, copy this file to the local folder before making changes. This is the code that I am now using for this function:

public function generatePassword($length = 14)
        $char_upper = array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
        $char_lower = array('a','b','c','d','e','f','g','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z');
        $char_num = array('0','1','2','3','4','5','6','7','8','9');
        $char_special = array('$','@','$','!','%','*','?','&','#','^');
        $chars_new = array();

        $char_upper_rand = array_rand(array_flip($char_upper), 2);
        $chars_new = array_merge($chars_new, $char_upper_rand);

        $char_lower_rand = array_rand(array_flip($char_lower), 8);
        $chars_new = array_merge($chars_new, $char_lower_rand);

        $char_num_rand = array_rand(array_flip($char_num), 2);
        $chars_new = array_merge($chars_new, $char_num_rand);

        $char_special_rand = array_rand(array_flip($char_special), 2);
        $chars_new = array_merge($chars_new, $char_special_rand);

        $final_chars = implode($chars_new);
        return Mage::helper('core')->getRandomString($length, $final_chars);

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