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diff --git a/vendor/fgrosse/phpasn1/lib/ASN1/ExplicitlyTaggedObject.php b/vendor/fgrosse/phpasn1/lib/ASN1/ExplicitlyTaggedObject.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;
+
+use FG\ASN1\Exception\ParserException;
+
+/**
+ * Class ExplicitlyTaggedObject decorate an inner object with an additional tag that gives information about
+ * its context specific meaning.
+ *
+ * Explanation taken from A Layman's Guide to a Subset of ASN.1, BER, and DER:
+ * >>> An RSA Laboratories Technical Note
+ * >>> Burton S. Kaliski Jr.
+ * >>> Revised November 1, 1993
+ *
+ * [...]
+ * Explicitly tagged types are derived from other types by adding an outer tag to the underlying type.
+ * In effect, explicitly tagged types are structured types consisting of one component, the underlying type.
+ * Explicit tagging is denoted by the ASN.1 keywords [class number] EXPLICIT (see Section 5.2).
+ * [...]
+ *
+ * @see http://luca.ntop.org/Teaching/Appunti/asn1.html
+ */
+class ExplicitlyTaggedObject extends ASNObject
+{
+    /** @var \FG\ASN1\ASNObject[] */
+    private $decoratedObjects;
+    private $tag;
+
+    /**
+     * @param int $tag
+     * @param \FG\ASN1\ASNObject $objects,...
+     */
+    public function __construct($tag, /* HH_FIXME[4858]: variadic + strict */ ...$objects)
+    {
+        $this->tag = $tag;
+        $this->decoratedObjects = $objects;
+    }
+
+    protected function calculateContentLength()
+    {
+        $length = 0;
+        foreach ($this->decoratedObjects as $object) {
+            $length += $object->getObjectLength();
+        }
+
+        return $length;
+    }
+
+    protected function getEncodedValue()
+    {
+        $encoded = '';
+        foreach ($this->decoratedObjects as $object) {
+            $encoded .= $object->getBinary();
+        }
+
+        return $encoded;
+    }
+
+    public function getContent()
+    {
+        return $this->decoratedObjects;
+    }
+
+    public function __toString()
+    {
+        switch ($length = count($this->decoratedObjects)) {
+        case 0:
+            return "Context specific empty object with tag [{$this->tag}]";
+        case 1:
+            $decoratedType = Identifier::getShortName($this->decoratedObjects[0]->getType());
+            return "Context specific $decoratedType with tag [{$this->tag}]";
+        default:
+            return "$length context specific objects with tag [{$this->tag}]";
+        }
+    }
+
+    public function getType()
+    {
+        return ord($this->getIdentifier());
+    }
+
+    public function getIdentifier()
+    {
+        $identifier = Identifier::create(Identifier::CLASS_CONTEXT_SPECIFIC, true, $this->tag);
+
+        return is_int($identifier) ? chr($identifier) : $identifier;
+    }
+
+    public function getTag()
+    {
+        return $this->tag;
+    }
+
+    public static function fromBinary(&$binaryData, &$offsetIndex = 0)
+    {
+        $identifier = self::parseBinaryIdentifier($binaryData, $offsetIndex);
+        $firstIdentifierOctet = ord($identifier);
+        assert(Identifier::isContextSpecificClass($firstIdentifierOctet), 'identifier octet should indicate context specific class');
+        assert(Identifier::isConstructed($firstIdentifierOctet), 'identifier octet should indicate constructed object');
+        $tag = Identifier::getTagNumber($identifier);
+
+        $totalContentLength = self::parseContentLength($binaryData, $offsetIndex);
+        $remainingContentLength = $totalContentLength;
+
+        $offsetIndexOfDecoratedObject = $offsetIndex;
+        $decoratedObjects = [];
+
+        while ($remainingContentLength > 0) {
+            $nextObject = ASNObject::fromBinary($binaryData, $offsetIndex);
+            $remainingContentLength -= $nextObject->getObjectLength();
+            $decoratedObjects[] = $nextObject;
+        }
+
+        if ($remainingContentLength != 0) {
+            throw new ParserException("Context-Specific explicitly tagged object [$tag] starting at offset $offsetIndexOfDecoratedObject specifies a length of $totalContentLength octets but $remainingContentLength remain after parsing the content", $offsetIndexOfDecoratedObject);
+        }
+
+        $parsedObject = new self($tag, ...$decoratedObjects);
+        $parsedObject->setContentLength($totalContentLength);
+        return $parsedObject;
+    }
+}