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pgserver/vendor/fgrosse/phpasn1/lib/ASN1/Universal/OctetString.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\ASNObject;
+use FG\ASN1\Parsable;
+use FG\ASN1\Identifier;
+
+class OctetString extends ASNObject implements Parsable
+{
+    protected $value;
+
+    public function __construct($value)
+    {
+        if (is_string($value)) {
+            // remove gaps between hex digits
+            $value = preg_replace('/\s|0x/', '', $value);
+        } elseif (is_numeric($value)) {
+            $value = dechex($value);
+        } elseif ($value === null) {
+            return;
+        } else {
+            throw new Exception('OctetString: unrecognized input type!');
+        }
+
+        if (strlen($value) % 2 != 0) {
+            // transform values like 1F2 to 01F2
+            $value = '0'.$value;
+        }
+
+        $this->value = $value;
+    }
+
+    public function getType()
+    {
+        return Identifier::OCTETSTRING;
+    }
+
+    protected function calculateContentLength()
+    {
+        return strlen($this->value) / 2;
+    }
+
+    protected function getEncodedValue()
+    {
+        $value = $this->value;
+        $result = '';
+
+        //Actual content
+        while (strlen($value) >= 2) {
+            // get the hex value byte by byte from the string and and add it to binary result
+            $result .= chr(hexdec(substr($value, 0, 2)));
+            $value = substr($value, 2);
+        }
+
+        return $result;
+    }
+
+    public function getContent()
+    {
+        return strtoupper($this->value);
+    }
+
+    public function getBinaryContent()
+    {
+        return $this->getEncodedValue();
+    }
+
+    public static function fromBinary(&$binaryData, &$offsetIndex = 0)
+    {
+        self::parseIdentifier($binaryData[$offsetIndex], Identifier::OCTETSTRING, $offsetIndex++);
+        $contentLength = self::parseContentLength($binaryData, $offsetIndex);
+
+        $value = substr($binaryData, $offsetIndex, $contentLength);
+        $offsetIndex += $contentLength;
+
+        $parsedObject = new self(bin2hex($value));
+        $parsedObject->setContentLength($contentLength);
+
+        return $parsedObject;
+    }
+}