224 lines
4.5 KiB
PHP
224 lines
4.5 KiB
PHP
<?php
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/**
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* IDS_Ips
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*
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* Will log and allow you to block ip addresses
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*
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* @category Security
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* @author Bernie Berg <bernie@dakotanetwork.com>
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* @license http://www.gnu.org/licenses/lgpl.html LGPL
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* @version Release: $Id:Ips.php 517 2011-07-29 15:04:13Z bernieberg $
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*/
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class IDS_Ips
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{
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/**
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* Holds the data from the log file
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*
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* @var array
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*/
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private $data = array();
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/**
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* how long an ip will be blocked from their last hit
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*
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* @var int
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*/
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private $blocked_duration = 7200;
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/**
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* How many negative hits until they are blocked
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*
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* @var int
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*/
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private $blocked_count = 5;
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/**
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* location of the ip log file
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*
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* @var string
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*/
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private $ip_file = null;
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/**
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* Constructor
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*
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* Sets up the object with the passed arguments
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*
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* @param string $ip_file location of the ip log file
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* @param int $duration how long, in seconds, to keep an ip blocked
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* @param int $count how many hits until be block this ip
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*
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* @return void
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*/
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public function __construct($ip_file, $duration = 7200, $count = 5)
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{
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$this->blocked_duration = $duration;
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$this->blocked_count = $count;
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$this->ip_file = $ip_file;
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if (!file_exists($ip_file)) {
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$this->data = array();
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return;
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}
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// 0 = ip address
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// 1 = count
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// 2 = last date
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// 3 = ban count
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$handle = fopen($ip_file, "r");
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$good_data = array();
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while (($data = fgetcsv($handle, 0, ",")) !== FALSE) {
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$good_data[$data[0]] = $data;
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}
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fclose($handle);
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$this->data = $good_data;
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}
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public function tempBlock($ip_address)
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{
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if (!array_key_exists($ip_address, $this->data)) {
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$this->data[$ip_address] = array($ip_address, $this->blocked_count + 1, time(), 0, false);
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} else {
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$this->data[$ip_address][1] += $this->blocked_count;
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$this->data[$ip_address][2] = time();
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}
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$this->writeLog();
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return true;
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}
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/**
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* isBlocked
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*
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* Is the passed ip address blocked?
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*
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* @param string $ip_address ip we are checking
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*
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* @return boolean
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*/
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public function isBlocked($ip_address)
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{
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if (!array_key_exists($ip_address, $this->data)) {
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return array(false, 0);
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}
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$blocked_time = time()-$this->blocked_duration;
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$ip_data = $this->data[$ip_address];
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//print_r($ip_data);
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if ($ip_data[1]>=$this->blocked_count && $ip_data[2]>=$blocked_time) {
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$this->incCount($ip_address);
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$this->writeLog();
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return array(true, $ip_data[3]);
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}
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elseif($ip_data[2] <= $blocked_time && $ip_data[4] == 1)
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{
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//$this->unBlock($ip_address);
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$this->resetCount($ip_address);
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$this->writeLog();
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}
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return array(false, 0);
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}
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/**
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* blockCount
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*
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* increase ban count, you should run writeLog after this
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*
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* @param string $ip_address ip we are checking
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*
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* @return void
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*/
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public function resetCount($ip_address)
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{
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if (array_key_exists($ip_address, $this->data)) {
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//unset($this->data[$ip_address]);
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$this->data[$ip_address][1] = 0;
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$this->data[$ip_address][4] = false;
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}
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}
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/**
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* blockCount
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*
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* increase ban count, you should run writeLog after this
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*
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* @param string $ip_address ip we are checking
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*
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* @return void
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*/
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public function incCount($ip_address)
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{
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if (array_key_exists($ip_address, $this->data) && $this->data[$ip_address][4] == false) {
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$this->data[$ip_address][3]++;
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$this->data[$ip_address][4] = true;
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}
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}
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/**
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* unBlock
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*
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* remove the passed ip address, you should run writeLog after this
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*
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* @param string $ip_address ip we are checking
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*
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* @return void
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*/
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public function unBlock($ip_address)
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{
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echo "UNBLOCKED !";
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if (array_key_exists($ip_address, $this->data)) {
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unset($this->data[$ip_address]);
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}
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}
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/**
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* logHit
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*
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* log and increment a negative hit for this ip address
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*
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* @param string $ip_address ip we are checking
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*
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* @return void
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*/
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public function logHit($ip_address)
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{
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if (!array_key_exists($ip_address, $this->data)) {
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$this->data[$ip_address] = array($ip_address, 1, time(), 0, false);
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} else {
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$this->data[$ip_address][1]++;
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$this->data[$ip_address][2] = time();
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}
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}
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/**
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* writeLog
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*
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* write the ip log file
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*
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* @return void
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*/
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public function writeLog()
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{
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$fp = fopen($this->ip_file, 'w');
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foreach ($this->data as $fields) {
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fputcsv($fp, $fields);
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}
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fclose($fp);
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return true;
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}
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}
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?>
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