55 lines
1.3 KiB
PHP
55 lines
1.3 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\ASNObject;
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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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class NullObject extends ASNObject implements Parsable
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{
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public function getType()
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{
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return Identifier::NULL;
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}
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protected function calculateContentLength()
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{
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return 0;
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}
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protected function getEncodedValue()
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{
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return null;
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}
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public function getContent()
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{
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return 'NULL';
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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::NULL, $offsetIndex++);
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$contentLength = self::parseContentLength($binaryData, $offsetIndex);
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if ($contentLength != 0) {
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throw new ParserException("An ASN.1 Null should not have a length other than zero. Extracted length was {$contentLength}", $offsetIndex);
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}
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$parsedObject = new self();
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$parsedObject->setContentLength(0);
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return $parsedObject;
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}
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}
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