<?php
/*
Copyright (c) 2009-2014 F3::Factory/Bong Cosca, All rights reserved.
This file is part of the Fat-Free Framework (http://fatfree.sf.net).
THE SOFTWARE AND DOCUMENTATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
PURPOSE.
Please see the license.txt file for more information.
*/
//! Data validator
class Audit extends Prefab {
//@{ User agents
const
UA_Mobile='android|blackberry|iphone|ipod|palm|windows\s+ce',
UA_Desktop='bsd|linux|os\s+[x9]|solaris|windows',
UA_Bot='bot|crawl|slurp|spider';
//@}
/**
* Return TRUE if string is a valid URL
* @return bool
* @param $str string
**/
function url($str) {
return is_string(filter_var($str,FILTER_VALIDATE_URL));
}
/**
* Return TRUE if string is a valid e-mail address;
* Check DNS MX records if specified
* @return bool
* @param $str string
* @param $mx boolean
**/
function email($str,$mx=TRUE) {
$hosts=array();
return is_string(filter_var($str,FILTER_VALIDATE_EMAIL)) &&
(!$mx || getmxrr(substr($str,strrpos($str,'@')+1),$hosts));
}
/**
* Return TRUE if string is a valid IPV4 address
* @return bool
* @param $addr string
**/
function ipv4($addr) {
return (bool)filter_var($addr,FILTER_VALIDATE_IP,FILTER_FLAG_IPV4);
}
/**
* Return TRUE if string is a valid IPV6 address
* @return bool
* @param $addr string
**/
function ipv6($addr) {
return (bool)filter_var($addr,FILTER_VALIDATE_IP,FILTER_FLAG_IPV6);
}
/**
* Return TRUE if IP address is within private range
* @return bool
* @param $addr string
**/
function isprivate($addr) {
return !(bool)filter_var($addr,FILTER_VALIDATE_IP,
FILTER_FLAG_IPV4|FILTER_FLAG_IPV6|FILTER_FLAG_NO_PRIV_RANGE);
}
/**
* Return TRUE if IP address is within reserved range
* @return bool
* @param $addr string
**/
function isreserved($addr) {
return !(bool)filter_var($addr,FILTER_VALIDATE_IP,
FILTER_FLAG_IPV4|FILTER_FLAG_IPV6|FILTER_FLAG_NO_RES_RANGE);
}
/**
* Return TRUE if IP address is neither private nor reserved
* @return bool
* @param $addr string
**/
function ispublic($addr) {
return (bool)filter_var($addr,FILTER_VALIDATE_IP,
FILTER_FLAG_IPV4|FILTER_FLAG_IPV6|
FILTER_FLAG_NO_PRIV_RANGE|FILTER_FLAG_NO_RES_RANGE);
}
/**
* Return TRUE if user agent is a desktop browser
* @return bool
**/
function isdesktop() {
$agent=Base::instance()->get('AGENT');
return (bool)preg_match('/('.self::UA_Desktop.')/i',$agent) &&
!$this->ismobile();
}
/**
* Return TRUE if user agent is a mobile device
* @return bool
**/
function ismobile() {
$agent=Base::instance()->get('AGENT');
return (bool)preg_match('/('.self::UA_Mobile.')/i',$agent);
}
/**
* Return TRUE if user agent is a Web bot
* @return bool
**/
function isbot() {
$agent=Base::instance()->get('AGENT');
return (bool)preg_match('/('.self::UA_Bot.')/i',$agent);
}
/**
* Return TRUE if specified ID has a valid (Luhn) Mod-10 check digit
* @return bool
* @param $id string
**/
function mod10($id) {
if (!ctype_digit($id))
return FALSE;
$id=strrev($id);
$sum=0;
for ($i=0,$l=strlen($id);$i<$l;$i++)
$sum+=$id[$i]+$i%2*(($id[$i]>4)*-4+$id[$i]%5);
return !($sum%10);
}
/**
* Return credit card type if number is valid
* @return string|FALSE
* @param $id string
**/
function card($id) {
$id=preg_replace('/[^\d]/','',$id);
if ($this->mod10($id)) {
if (preg_match('/^3[47][0-9]{13}$/',$id))
return 'American Express';
if (preg_match('/^3(?:0[0-5]|[68][0-9])[0-9]{11}$/',$id))
return 'Diners Club';
if (preg_match('/^6(?:011|5[0-9][0-9])[0-9]{12}$/',$id))
return 'Discover';
if (preg_match('/^(?:2131|1800|35\d{3})\d{11}$/',$id))
return 'JCB';
if (preg_match('/^5[1-5][0-9]{14}$/',$id))
return 'MasterCard';
if (preg_match('/^4[0-9]{12}(?:[0-9]{3})?$/',$id))
return 'Visa';
}
return FALSE;
}
/**
* Return entropy estimate of a password (NIST 800-63)
* @return int|float
* @param $str string
**/
function entropy($str) {
$len=strlen($str);
return 4*min($len,1)+($len>1?(2*(min($len,8)-1)):0)+
($len>8?(1.5*(min($len,20)-8)):0)+($len>20?($len-20):0)+
6*(bool)(preg_match(
'/[A-Z].*?[0-9[:punct:]]|[0-9[:punct:]].*?[A-Z]/',$str));
}
}
