<?php
/*
* This file is part of the PHPASN1 library.
*
* Copyright © Friedrich Große <friedrich.grosse@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace FG\X509\SAN;
use FG\ASN1\ASNObject;
use FG\ASN1\Parsable;
use FG\ASN1\Exception\ParserException;
class IPAddress extends ASNObject implements Parsable
{
const IDENTIFIER = 0x87; // not sure yet why this is the identifier used in SAN extensions
/** @var string */
private $value;
public function __construct($ipAddressString)
{
$this->value = $ipAddressString;
}
public function getType()
{
return self::IDENTIFIER;
}
public function getContent()
{
return $this->value;
}
protected function calculateContentLength()
{
return 4;
}
protected function getEncodedValue()
{
$ipParts = explode('.', $this->value);
$binary = chr($ipParts[0]);
$binary .= chr($ipParts[1]);
$binary .= chr($ipParts[2]);
$binary .= chr($ipParts[3]);
return $binary;
}
public static function fromBinary(&$binaryData, &$offsetIndex = 0)
{
self::parseIdentifier($binaryData[$offsetIndex], self::IDENTIFIER, $offsetIndex++);
$contentLength = self::parseContentLength($binaryData, $offsetIndex);
if ($contentLength != 4) {
throw new ParserException("A FG\\X509\SAN\IPAddress should have a content length of 4. Extracted length was {$contentLength}", $offsetIndex);
}
$ipAddressString = ord($binaryData[$offsetIndex++]).'.';
$ipAddressString .= ord($binaryData[$offsetIndex++]).'.';
$ipAddressString .= ord($binaryData[$offsetIndex++]).'.';
$ipAddressString .= ord($binaryData[$offsetIndex++]);
$parsedObject = new self($ipAddressString);
$parsedObject->getObjectLength();
return $parsedObject;
}
}