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<?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\ASN1\Universal;
use FG\ASN1\AbstractTime;
use FG\ASN1\Parsable;
use FG\ASN1\Identifier;
use FG\ASN1\Exception\ParserException;
/**
* This ASN.1 universal type contains the calendar date and time.
*
* The precision is one minute or one second and optionally a
* local time differential from coordinated universal time.
*
* Decoding of this type will accept the Basic Encoding Rules (BER)
* The encoding will comply with the Distinguished Encoding Rules (DER).
*/
class UTCTime extends AbstractTime implements Parsable
{
public function getType()
{
return Identifier::UTC_TIME;
}
protected function calculateContentLength()
{
return 13; // Content is a string o the following format: YYMMDDhhmmssZ (13 octets)
}
protected function getEncodedValue()
{
return $this->value->format('ymdHis').'Z';
}
public static function fromBinary(&$binaryData, &$offsetIndex = 0)
{
self::parseIdentifier($binaryData[$offsetIndex], Identifier::UTC_TIME, $offsetIndex++);
$contentLength = self::parseContentLength($binaryData, $offsetIndex, 11);
$format = 'ymdGi';
$dateTimeString = substr($binaryData, $offsetIndex, 10);
$offsetIndex += 10;
// extract optional seconds part
if ($binaryData[$offsetIndex] != 'Z'
&& $binaryData[$offsetIndex] != '+'
&& $binaryData[$offsetIndex] != '-') {
$dateTimeString .= substr($binaryData, $offsetIndex, 2);
$offsetIndex += 2;
$format .= 's';
}
$dateTime = \DateTime::createFromFormat($format, $dateTimeString, new \DateTimeZone('UTC'));
// extract time zone settings
if ($binaryData[$offsetIndex] == '+'
|| $binaryData[$offsetIndex] == '-') {
$dateTime = static::extractTimeZoneData($binaryData, $offsetIndex, $dateTime);
} elseif ($binaryData[$offsetIndex++] != 'Z') {
throw new ParserException('Invalid UTC String', $offsetIndex);
}
$parsedObject = new self($dateTime);
$parsedObject->setContentLength($contentLength);
return $parsedObject;
}
}
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