constraint_digit_placement.inc in Password Policy 6

Restrict placement of digits in passwords.

@link http://drupal.org/node/316768 @author David Kent Norman (http://deekayen.net/)

File

constraints/constraint_digit_placement.inc

<?php

/**
 * @file
 * Restrict placement of digits in passwords.
 *
 * @link http://drupal.org/node/316768
 * @author David Kent Norman (http://deekayen.net/)
 */

/****************************************************************************/

/* Constraint API                                                           */

/****************************************************************************/

/**
 * Description of the constraint.
 */
function password_policy_constraint_digit_placement_description() {
  return array(
    'name' => t('Digit Placement'),
    'description' => t('Minimum number of digits in the password to allow a digit in the first or last position in the password (e.g. 2abcdefg and abcdefg4 are unacceptable passwords, while 2qpcxrm3 and 99qpcxrm are allowed passwords when 2 is set here).'),
  );
}

/**
 * Error message of the constraint.
 */
function password_policy_constraint_digit_placement_error($constraint) {
  return t('Password must have a minimum of %numChars %digits in order to place any digits at the start or end of the password.', array(
    '%numChars' => $constraint,
    '%digits' => format_plural($constraint, t('digit'), t('digits')),
  ));
}

/**
 * Password validation.
 */
function password_policy_constraint_digit_placement_validate($password, $constraint, $uid) {
  $number_of_digits = 0;
  for ($i = 0; $i < 10; $i++) {

    // help string count by sending it a string instead of an int
    $number_of_digits += substr_count($password, "{$i}");
  }
  if ($number_of_digits < (int) $constraint) {
    return preg_match("/^(\\d+)|(\\d+)\$/", $password) != 1;
  }
  return TRUE;
}

/**
 * Javascript portion.
 */
function password_policy_constraint_digit_placement_js($constraint, $uid) {
  return <<<JSS
  function substr_count(haystack, needle) {
    var pos = 0, cnt = 0;

    haystack += '';
    needle += '';
    var offset = 0;
    var length = 0;
    offset--;

    while ((offset = haystack.indexOf(needle, offset+1)) != -1) {
      if (length > 0 && (offset+needle.length) > length) {
        return false;
      } else {
        cnt++;
      }
    }
    return cnt;
  }

  var i=0;
  var num=0;
  for (i=0;i<10;i++) {
    num += substr_count(value, i);
  }
  if (num<{<span class="php-variable">$constraint</span>} && value.match(/^(\\d+)|(\\d+)\$/) != null) {
    strength="low";
    msg.push(translate.constraint_digit_placement);
  }
JSS;
}

Functions

Name	Description
password_policy_constraint_digit_placement_description	Description of the constraint.
password_policy_constraint_digit_placement_error	Error message of the constraint.
password_policy_constraint_digit_placement_js	Javascript portion.
password_policy_constraint_digit_placement_validate	Password validation.