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Add trusted IPs in config and try to ban forwarded IP on failed login

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* Add a new settings (which needs to be manually set): `security.trusted_proxies`
  * On login failure, if the `REMOTE_ADDR` is in the trusted proxies, try to retrieve the forwarded IP in headers.
  * If found, the client address is added in ipbans, else we do nothing.

Fixes #409
This commit is contained in:
ArthurHoaro 2016-08-03 10:36:47 +02:00
parent c7a42ab1d9
commit 50d1791838
3 changed files with 94 additions and 1 deletions
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26
application/HttpUtils.php
View file

@ -215,3 +215,29 @@ function page_url($server)
}
return index_url($server);
}
/**
* Retrieve the initial IP forwarded by the reverse proxy.
*
* Inspired from: https://github.com/zendframework/zend-http/blob/master/src/PhpEnvironment/RemoteAddress.php
*
* @param array $server $_SERVER array which contains HTTP headers.
* @param array $trustedIps List of trusted IP from the configuration.
*
* @return string|bool The forwarded IP, or false if none could be extracted.
*/
function getIpAddressFromProxy($server, $trustedIps)
{
$forwardedIpHeader = 'HTTP_X_FORWARDED_FOR';
if (empty($server[$forwardedIpHeader])) {
return false;
}
$ips = preg_split('/\s*,\s*/', $server[$forwardedIpHeader]);
$ips = array_diff($ips, $trustedIps);
if (empty($ips)) {
return false;
}
return array_pop($ips);
}

11
index.php
View file

@ -318,8 +318,17 @@ include $conf->get('resource.ban_file', 'data/ipbans.php');
function ban_loginFailed($conf)
{
$ip = $_SERVER['REMOTE_ADDR'];
$trusted = $conf->get('security.trusted_proxies', array());
if (in_array($ip, $trusted)) {
$ip = getIpAddressFromProxy($_SERVER, $trusted);
if (!$ip) {
return;
}
}
$gb = $GLOBALS['IPBANS'];
if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0;
if (! isset($gb['FAILURES'][$ip])) {
$gb['FAILURES'][$ip]=0;
}
$gb['FAILURES'][$ip]++;
if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
{

58
tests/HttpUtils/GetIpAdressFromProxyTest.php Normal file
View file

@ -0,0 +1,58 @@
<?php
require_once 'application/HttpUtils.php';
/**
* Unitary tests for getIpAddressFromProxy()
*/
class GetIpAdressFromProxyTest extends PHPUnit_Framework_TestCase {
/**
* Test without proxy
*/
public function testWithoutProxy()
{
$this->assertFalse(getIpAddressFromProxy(array(), array()));
}
/**
* Test with a single IP in proxy header.
*/
public function testWithOneForwardedIp()
{
$ip = '1.1.1.1';
$server = array('HTTP_X_FORWARDED_FOR' => $ip);
$this->assertEquals($ip, getIpAddressFromProxy($server, array()));
}
/**
* Test with a multiple IPs in proxy header.
*/
public function testWithMultipleForwardedIp()
{
$ip = '1.1.1.1';
$ip2 = '2.2.2.2';
$server = array('HTTP_X_FORWARDED_FOR' => $ip .','. $ip2);
$this->assertEquals($ip2, getIpAddressFromProxy($server, array()));
$server = array('HTTP_X_FORWARDED_FOR' => $ip .' , '. $ip2);
$this->assertEquals($ip2, getIpAddressFromProxy($server, array()));
}
/**
* Test with a trusted IP address.
*/
public function testWithTrustedIp()
{
$ip = '1.1.1.1';
$ip2 = '2.2.2.2';
$server = array('HTTP_X_FORWARDED_FOR' => $ip);
$this->assertFalse(getIpAddressFromProxy($server, array($ip)));
$server = array('HTTP_X_FORWARDED_FOR' => $ip .','. $ip2);
$this->assertEquals($ip2, getIpAddressFromProxy($server, array($ip)));
$this->assertFalse(getIpAddressFromProxy($server, array($ip, $ip2)));
}
}