<?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 date and time information according to ISO 8601.
*
* The type consists of values representing:
* a) a calendar date, as defined in ISO 8601; and
* b) a time of day, to any of the precisions defined in ISO 8601, except for the hours value 24 which shall not be used; and
* c) the local time differential factor as defined in ISO 8601.
*
* Decoding of this type will accept the Basic Encoding Rules (BER)
* The encoding will comply with the Distinguished Encoding Rules (DER).
*/
class GeneralizedTime extends AbstractTime implements Parsable
{
private $microseconds;
public function __construct($dateTime = null, $dateTimeZone = 'UTC')
{
parent::__construct($dateTime, $dateTimeZone);
$this->microseconds = $this->value->format('u');
if ($this->containsFractionalSecondsElement()) {
// DER requires us to remove trailing zeros
$this->microseconds = preg_replace('/([1-9]+)0+$/', '$1', $this->microseconds);
}
}
public function getType()
{
return Identifier::GENERALIZED_TIME;
}
protected function calculateContentLength()
{
$contentSize = 15; // YYYYMMDDHHmmSSZ
if ($this->containsFractionalSecondsElement()) {
$contentSize += 1 + strlen($this->microseconds);
}
return $contentSize;
}
public function containsFractionalSecondsElement()
{
return intval($this->microseconds) > 0;
}
protected function getEncodedValue()
{
$encodedContent = $this->value->format('YmdHis');
if ($this->containsFractionalSecondsElement()) {
$encodedContent .= ".{$this->microseconds}";
}
return $encodedContent.'Z';
}
public function __toString()
{
if ($this->containsFractionalSecondsElement()) {
return $this->value->format("Y-m-d\tH:i:s.uP");
} else {
return $this->value->format("Y-m-d\tH:i:sP");
}
}
public static function fromBinary(&$binaryData, &$offsetIndex = 0)
{
self::parseIdentifier($binaryData[$offsetIndex], Identifier::GENERALIZED_TIME, $offsetIndex++);
$lengthOfMinimumTimeString = 14; // YYYYMMDDHHmmSS
$contentLength = self::parseContentLength($binaryData, $offsetIndex, $lengthOfMinimumTimeString);
$maximumBytesToRead = $contentLength;
$format = 'YmdGis';
$content = substr($binaryData, $offsetIndex, $contentLength);
$dateTimeString = substr($content, 0, $lengthOfMinimumTimeString);
$offsetIndex += $lengthOfMinimumTimeString;
$maximumBytesToRead -= $lengthOfMinimumTimeString;
if ($contentLength == $lengthOfMinimumTimeString) {
$localTimeZone = new \DateTimeZone(date_default_timezone_get());
$dateTime = \DateTime::createFromFormat($format, $dateTimeString, $localTimeZone);
} else {
if ($binaryData[$offsetIndex] == '.') {
$maximumBytesToRead--; // account for the '.'
$nrOfFractionalSecondElements = 1; // account for the '.'
while ($maximumBytesToRead > 0
&& $binaryData[$offsetIndex + $nrOfFractionalSecondElements] != '+'
&& $binaryData[$offsetIndex + $nrOfFractionalSecondElements] != '-'
&& $binaryData[$offsetIndex + $nrOfFractionalSecondElements] != 'Z') {
$nrOfFractionalSecondElements++;
$maximumBytesToRead--;
}
$dateTimeString .= substr($binaryData, $offsetIndex, $nrOfFractionalSecondElements);
$offsetIndex += $nrOfFractionalSecondElements;
$format .= '.u';
}
$dateTime = \DateTime::createFromFormat($format, $dateTimeString, new \DateTimeZone('UTC'));
if ($maximumBytesToRead > 0) {
if ($binaryData[$offsetIndex] == '+'
|| $binaryData[$offsetIndex] == '-') {
$dateTime = static::extractTimeZoneData($binaryData, $offsetIndex, $dateTime);
} elseif ($binaryData[$offsetIndex++] != 'Z') {
throw new ParserException('Invalid ISO 8601 Time String', $offsetIndex);
}
}
}
$parsedObject = new self($dateTime);
$parsedObject->setContentLength($contentLength);
return $parsedObject;
}
}