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* * 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\ASNObject; use FG\ASN1\Parsable; use FG\ASN1\Identifier; use FG\ASN1\Exception\ParserException; class NullObject extends ASNObject implements Parsable { public function getType() { return Identifier::NULL; } protected function calculateContentLength() { return 0; } protected function getEncodedValue() { return null; } public function getContent() { return 'NULL'; } public static function fromBinary(&$binaryData, &$offsetIndex = 0) { self::parseIdentifier($binaryData[$offsetIndex], Identifier::NULL, $offsetIndex++); $contentLength = self::parseContentLength($binaryData, $offsetIndex); if ($contentLength != 0) { throw new ParserException("An ASN.1 Null should not have a length other than zero. Extracted length was {$contentLength}", $offsetIndex); } $parsedObject = new self(); $parsedObject->setContentLength(0); return $parsedObject; } }