76 lines
1.8 KiB
PHP
76 lines
1.8 KiB
PHP
<?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 Boolean extends ASNObject implements Parsable
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{
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private $value;
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/**
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* @param bool $value
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*/
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public function __construct($value)
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{
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$this->value = $value;
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}
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public function getType()
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{
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return Identifier::BOOLEAN;
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}
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protected function calculateContentLength()
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{
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return 1;
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}
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protected function getEncodedValue()
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{
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if ($this->value == false) {
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return chr(0x00);
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} else {
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return chr(0xFF);
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}
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}
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public function getContent()
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{
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if ($this->value == true) {
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return 'TRUE';
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} else {
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return 'FALSE';
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}
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}
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public static function fromBinary(&$binaryData, &$offsetIndex = 0)
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{
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self::parseIdentifier($binaryData[$offsetIndex], Identifier::BOOLEAN, $offsetIndex++);
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$contentLength = self::parseContentLength($binaryData, $offsetIndex);
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if ($contentLength != 1) {
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throw new ParserException("An ASN.1 Boolean should not have a length other than one. Extracted length was {$contentLength}", $offsetIndex);
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}
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$value = ord($binaryData[$offsetIndex++]);
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$booleanValue = $value == 0xFF ? true : false;
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$parsedObject = new self($booleanValue);
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$parsedObject->setContentLength($contentLength);
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return $parsedObject;
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}
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}
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