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add IPUtils.php to control and implement symfony IpUtils (#6062)

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This commit is contained in:
Andrew Aitken-Fincham 2016-09-26 00:44:55 +01:00 committed by Sam Minnée
parent 6022012481
commit ad0d68d133
3 changed files with 215 additions and 3 deletions
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129
control/IPUtils.php Normal file
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@ -0,0 +1,129 @@
<?php
/**
* These helpful functions were lifted from the Symfony library
* https://github.com/symfony/http-foundation/blob/master/LICENSE
*
* Http utility functions.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
namespace SilverStripe\Control\Util;
/**
* Http utility functions.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class IPUtils {
/**
* This class should not be instantiated.
*/
private function __construct()
{
}
/**
* Checks if an IPv4 or IPv6 address is contained in the list of given IPs or subnets.
*
* @param string $requestIP IP to check
* @param string|array $ips List of IPs or subnets (can be a string if only a single one)
*
* @return bool Whether the IP is valid
*
* @package framework
* @subpackage core
*/
public static function checkIP($requestIP, $ips) {
if (!is_array($ips)) {
$ips = array($ips);
}
$method = substr_count($requestIP, ':') > 1 ? 'checkIP6' : 'checkIP4';
foreach ($ips as $ip) {
if (self::$method($requestIP, trim($ip))) {
return true;
}
}
return false;
}
/**
* Compares two IPv4 addresses.
* In case a subnet is given, it checks if it contains the request IP.
*
* @param string $requestIP IPv4 address to check
* @param string $ip IPv4 address or subnet in CIDR notation
*
* @return bool Whether the request IP matches the IP, or whether the request IP is within the CIDR subnet
*/
public static function checkIP4($requestIP, $ip) {
if (!filter_var($requestIP, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
return false;
}
if (false !== strpos($ip, '/')) {
list($address, $netmask) = explode('/', $ip, 2);
if ($netmask === '0') {
return filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
}
if ($netmask < 0 || $netmask > 32) {
return false;
}
} else {
$address = $ip;
$netmask = 32;
}
return 0 === substr_compare(sprintf('%032b', ip2long($requestIP)), sprintf('%032b', ip2long($address)), 0, $netmask);
}
/**
* Compares two IPv6 addresses.
* In case a subnet is given, it checks if it contains the request IP.
*
* @author David Soria Parra <dsp at php dot net>
*
* @see https://github.com/dsp/v6tools
*
* @param string $requestIP IPv6 address to check
* @param string $ip IPv6 address or subnet in CIDR notation
*
* @return bool Whether the IP is valid
*
* @throws \RuntimeException When IPV6 support is not enabled
*/
public static function checkIP6($requestIP, $ip) {
if (!((extension_loaded('sockets') && defined('AF_INET6')) || @inet_pton('::1'))) {
throw new \RuntimeException('Unable to check IPv6. Check that PHP was not compiled with option "disable-ipv6".');
}
if (false !== strpos($ip, '/')) {
list($address, $netmask) = explode('/', $ip, 2);
if ($netmask < 1 || $netmask > 128) {
return false;
}
} else {
$address = $ip;
$netmask = 128;
}
$bytesAddr = unpack('n*', @inet_pton($address));
$bytesTest = unpack('n*', @inet_pton($requestIP));
if (!$bytesAddr || !$bytesTest) {
return false;
}
for ($i = 1, $ceil = ceil($netmask / 16); $i <= $ceil; ++$i) {
$left = $netmask - 16 * ($i - 1);
$left = ($left <= 16) ? $left : 16;
$mask = ~(0xffff >> $left) & 0xffff;
if (($bytesAddr[$i] & $mask) != ($bytesTest[$i] & $mask)) {
return false;
}
}
return true;
}
}

9
core/Constants.php
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@ -105,7 +105,10 @@ if(!defined('TRUSTED_PROXY')) {
if(SS_TRUSTED_PROXY_IPS === '*') {
$trusted = true;
} elseif(isset($_SERVER['REMOTE_ADDR'])) {
$trusted = in_array($_SERVER['REMOTE_ADDR'], explode(',', SS_TRUSTED_PROXY_IPS));
if(!class_exists('SilverStripe\\Control\\Util\\IPUtils')) {
require_once FRAMEWORK_PATH . '/control/IPUtils.php';
};
$trusted = IPUtils::checkIP($_SERVER['REMOTE_ADDR'], explode(',', SS_TRUSTED_PROXY_IPS));
}
}
}
@ -122,7 +125,7 @@ if(!defined('TRUSTED_PROXY')) {
*/
if(!isset($_SERVER['HTTP_HOST'])) {
// HTTP_HOST, REQUEST_PORT, SCRIPT_NAME, and PHP_SELF
global $_FILE_TO_URL_MAPPING;
global $_FILE_TO_URL_MAPPING;
if(isset($_FILE_TO_URL_MAPPING)) {
$fullPath = $testPath = realpath($_SERVER['SCRIPT_FILENAME']);
while($testPath && $testPath != '/' && !preg_match('/^[A-Z]:\\\\$/', $testPath)) {
@ -182,7 +185,7 @@ if(!isset($_SERVER['HTTP_HOST'])) {
$trustedProxyHeader = (defined('SS_TRUSTED_PROXY_HOST_HEADER'))
? SS_TRUSTED_PROXY_HOST_HEADER
: 'HTTP_X_FORWARDED_HOST';
if (TRUSTED_PROXY && !empty($_SERVER[$trustedProxyHeader])) {
// Get the first host, in case there's multiple separated through commas
$_SERVER['HTTP_HOST'] = strtok($_SERVER[$trustedProxyHeader], ',');

80
tests/control/IPUtilsTest.php Normal file
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@ -0,0 +1,80 @@
<?php
/**
* These helpful tests were lifted from the Symfony library
* https://github.com/symfony/http-foundation/blob/master/LICENSE
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
use SilverStripe\Control\Util\IPUtils;
class IPUtilsTest extends SapphireTest {
/**
* @dataProvider testIPv4Provider
*/
public function testIPv4($matches, $remoteAddr, $cidr)
{
$this->assertSame($matches, IPUtils::checkIP($remoteAddr, $cidr));
}
public function testIPv4Provider()
{
return array(
array(true, '192.168.1.1', '192.168.1.1'),
array(true, '192.168.1.1', '192.168.1.1/1'),
array(true, '192.168.1.1', '192.168.1.0/24'),
array(false, '192.168.1.1', '1.2.3.4/1'),
array(false, '192.168.1.1', '192.168.1.1/33'), // invalid subnet
array(true, '192.168.1.1', array('1.2.3.4/1', '192.168.1.0/24')),
array(true, '192.168.1.1', array('192.168.1.0/24', '1.2.3.4/1')),
array(false, '192.168.1.1', array('1.2.3.4/1', '4.3.2.1/1')),
array(true, '1.2.3.4', '0.0.0.0/0'),
array(true, '1.2.3.4', '192.168.1.0/0'),
array(false, '1.2.3.4', '256.256.256/0'), // invalid CIDR notation
array(false, 'an_invalid_ip', '192.168.1.0/24'),
);
}
/**
* @dataProvider testIPv6Provider
*/
public function testIPv6($matches, $remoteAddr, $cidr)
{
if (!defined('AF_INET6')) {
$this->markTestSkipped('Only works when PHP is compiled without the option "disable-ipv6".');
}
$this->assertSame($matches, IPUtils::checkIP($remoteAddr, $cidr));
}
public function testIPv6Provider()
{
return array(
array(true, '2a01:198:603:0:396e:4789:8e99:890f', '2a01:198:603:0::/65'),
array(false, '2a00:198:603:0:396e:4789:8e99:890f', '2a01:198:603:0::/65'),
array(false, '2a01:198:603:0:396e:4789:8e99:890f', '::1'),
array(true, '0:0:0:0:0:0:0:1', '::1'),
array(false, '0:0:603:0:396e:4789:8e99:0001', '::1'),
array(true, '2a01:198:603:0:396e:4789:8e99:890f', array('::1', '2a01:198:603:0::/65')),
array(true, '2a01:198:603:0:396e:4789:8e99:890f', array('2a01:198:603:0::/65', '::1')),
array(false, '2a01:198:603:0:396e:4789:8e99:890f', array('::1', '1a01:198:603:0::/65')),
array(false, '}__test|O:21:&quot;JDatabaseDriverMysqli&quot;:3:{s:2', '::1'),
array(false, '2a01:198:603:0:396e:4789:8e99:890f', 'unknown'),
);
}
/**
* @expectedException \RuntimeException
* @requires extension sockets
*/
public function testAnIPv6WithOptionDisabledIPv6()
{
if (defined('AF_INET6')) {
$this->markTestSkipped('Only works when PHP is compiled with the option "disable-ipv6".');
}
IPUtils::checkIP('2a01:198:603:0:396e:4789:8e99:890f', '2a01:198:603:0::/65');
}
}