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pgserver/vendor/fgrosse/phpasn1/lib/ASN1/Universal/NullObject.php

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+<?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\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;
+    }
+}