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pgserver/vendor/fgrosse/phpasn1/lib/ASN1/Universal/ObjectIdentifier.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 Exception;
+use FG\ASN1\Base128;
+use FG\ASN1\OID;
+use FG\ASN1\ASNObject;
+use FG\ASN1\Parsable;
+use FG\ASN1\Identifier;
+use FG\ASN1\Exception\ParserException;
+
+class ObjectIdentifier extends ASNObject implements Parsable
+{
+    protected $subIdentifiers;
+    protected $value;
+
+    public function __construct($value)
+    {
+        $this->subIdentifiers = explode('.', $value);
+        $nrOfSubIdentifiers = count($this->subIdentifiers);
+
+        for ($i = 0; $i < $nrOfSubIdentifiers; $i++) {
+            if (is_numeric($this->subIdentifiers[$i])) {
+                // enforce the integer type
+                $this->subIdentifiers[$i] = intval($this->subIdentifiers[$i]);
+            } else {
+                throw new Exception("[{$value}] is no valid object identifier (sub identifier ".($i + 1).' is not numeric)!');
+            }
+        }
+
+        // Merge the first to arcs of the OID registration tree (per ASN definition!)
+        if ($nrOfSubIdentifiers >= 2) {
+            $this->subIdentifiers[1] = ($this->subIdentifiers[0] * 40) + $this->subIdentifiers[1];
+            unset($this->subIdentifiers[0]);
+        }
+
+        $this->value = $value;
+    }
+
+    public function getContent()
+    {
+        return $this->value;
+    }
+
+    public function getType()
+    {
+        return Identifier::OBJECT_IDENTIFIER;
+    }
+
+    protected function calculateContentLength()
+    {
+        $length = 0;
+        foreach ($this->subIdentifiers as $subIdentifier) {
+            do {
+                $subIdentifier = $subIdentifier >> 7;
+                $length++;
+            } while ($subIdentifier > 0);
+        }
+
+        return $length;
+    }
+
+    protected function getEncodedValue()
+    {
+        $encodedValue = '';
+        foreach ($this->subIdentifiers as $subIdentifier) {
+            $encodedValue .= Base128::encode($subIdentifier);
+        }
+
+        return $encodedValue;
+    }
+
+    public function __toString()
+    {
+        return OID::getName($this->value);
+    }
+
+    public static function fromBinary(&$binaryData, &$offsetIndex = 0)
+    {
+        self::parseIdentifier($binaryData[$offsetIndex], Identifier::OBJECT_IDENTIFIER, $offsetIndex++);
+        $contentLength = self::parseContentLength($binaryData, $offsetIndex, 1);
+
+        $firstOctet = ord($binaryData[$offsetIndex++]);
+        $oidString = floor($firstOctet / 40).'.'.($firstOctet % 40);
+        $oidString .= '.'.self::parseOid($binaryData, $offsetIndex, $contentLength - 1);
+
+        $parsedObject = new self($oidString);
+        $parsedObject->setContentLength($contentLength);
+
+        return $parsedObject;
+    }
+
+    /**
+     * Parses an object identifier except for the first octet, which is parsed
+     * differently. This way relative object identifiers can also be parsed
+     * using this.
+     *
+     * @param $binaryData
+     * @param $offsetIndex
+     * @param $octetsToRead
+     *
+     * @throws ParserException
+     *
+     * @return string
+     */
+    protected static function parseOid(&$binaryData, &$offsetIndex, $octetsToRead)
+    {
+        $oid = '';
+
+        while ($octetsToRead > 0) {
+            $octets = '';
+
+            do {
+                if (0 === $octetsToRead) {
+                    throw new ParserException('Malformed ASN.1 Object Identifier', $offsetIndex - 1);
+                }
+
+                $octetsToRead--;
+                $octet = $binaryData[$offsetIndex++];
+                $octets .= $octet;
+            } while (ord($octet) & 0x80);
+
+            $oid .= sprintf('%d.', Base128::decode($octets));
+        }
+
+        // Remove trailing '.'
+        return substr($oid, 0, -1) ?: '';
+    }
+}