78 lines
2.4 KiB
PHP
78 lines
2.4 KiB
PHP
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<?php
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/*
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* This file is part of the PHPASN1 library.
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*
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* Copyright © Friedrich Große <friedrich.grosse@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace FG\ASN1\Universal;
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use FG\ASN1\AbstractTime;
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use FG\ASN1\Parsable;
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use FG\ASN1\Identifier;
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use FG\ASN1\Exception\ParserException;
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/**
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* This ASN.1 universal type contains the calendar date and time.
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*
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* The precision is one minute or one second and optionally a
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* local time differential from coordinated universal time.
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*
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* Decoding of this type will accept the Basic Encoding Rules (BER)
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* The encoding will comply with the Distinguished Encoding Rules (DER).
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*/
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class UTCTime extends AbstractTime implements Parsable
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{
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public function getType()
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{
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return Identifier::UTC_TIME;
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}
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protected function calculateContentLength()
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{
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return 13; // Content is a string o the following format: YYMMDDhhmmssZ (13 octets)
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}
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protected function getEncodedValue()
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{
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return $this->value->format('ymdHis').'Z';
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}
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public static function fromBinary(&$binaryData, &$offsetIndex = 0)
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{
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self::parseIdentifier($binaryData[$offsetIndex], Identifier::UTC_TIME, $offsetIndex++);
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$contentLength = self::parseContentLength($binaryData, $offsetIndex, 11);
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$format = 'ymdGi';
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$dateTimeString = substr($binaryData, $offsetIndex, 10);
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$offsetIndex += 10;
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// extract optional seconds part
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if ($binaryData[$offsetIndex] != 'Z'
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&& $binaryData[$offsetIndex] != '+'
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&& $binaryData[$offsetIndex] != '-') {
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$dateTimeString .= substr($binaryData, $offsetIndex, 2);
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$offsetIndex += 2;
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$format .= 's';
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}
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$dateTime = \DateTime::createFromFormat($format, $dateTimeString, new \DateTimeZone('UTC'));
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// extract time zone settings
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if ($binaryData[$offsetIndex] == '+'
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|| $binaryData[$offsetIndex] == '-') {
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$dateTime = static::extractTimeZoneData($binaryData, $offsetIndex, $dateTime);
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} elseif ($binaryData[$offsetIndex++] != 'Z') {
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throw new ParserException('Invalid UTC String', $offsetIndex);
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}
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$parsedObject = new self($dateTime);
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$parsedObject->setContentLength($contentLength);
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return $parsedObject;
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}
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}
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