1 files changed, 130 insertions, 0 deletions

diff --git a/vendor/fgrosse/phpasn1/lib/ASN1/Universal/Integer.php b/vendor/fgrosse/phpasn1/lib/ASN1/Universal/Integer.php
new file mode 100644
index 0000000..fe3806b
--- /dev/null
+++ b/vendor/fgrosse/phpasn1/lib/ASN1/Universal/Integer.php
@@ -0,0 +1,130 @@
+<?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\Utility\BigInteger;
+use FG\ASN1\Exception\ParserException;
+use FG\ASN1\ASNObject;
+use FG\ASN1\Parsable;
+use FG\ASN1\Identifier;
+
+class Integer extends ASNObject implements Parsable
+{
+    /** @var int */
+    private $value;
+
+    /**
+     * @param int $value
+     *
+     * @throws Exception if the value is not numeric
+     */
+    public function __construct($value)
+    {
+        if (is_numeric($value) == false) {
+            throw new Exception("Invalid VALUE [{$value}] for ASN1_INTEGER");
+        }
+        $this->value = $value;
+    }
+
+    public function getType()
+    {
+        return Identifier::INTEGER;
+    }
+
+    public function getContent()
+    {
+        return $this->value;
+    }
+
+    protected function calculateContentLength()
+    {
+        return strlen($this->getEncodedValue());
+    }
+
+    protected function getEncodedValue()
+    {
+        $value = BigInteger::create($this->value, 10);
+        $negative = $value->compare(0) < 0;
+        if ($negative) {
+             $value = $value->absoluteValue();
+             $limit = 0x80;
+        } else {
+             $limit = 0x7f;
+        }
+
+        $mod = 0xff+1;
+        $values = [];
+        while($value->compare($limit) > 0) {
+            $values[] = $value->modulus($mod)->toInteger();
+            $value = $value->shiftRight(8);
+        }
+
+        $values[] = $value->modulus($mod)->toInteger();
+        $numValues = count($values);
+
+        if ($negative) {
+            for ($i = 0; $i < $numValues; $i++) {
+                $values[$i] = 0xff - $values[$i];
+            }
+            for ($i = 0; $i < $numValues; $i++) {
+                $values[$i] += 1;
+                if ($values[$i] <= 0xff) {
+                    break;
+                }
+                assert($i != $numValues - 1);
+                $values[$i] = 0;
+            }
+            if ($values[$numValues - 1] == 0x7f) {
+                $values[] = 0xff;
+            }
+        }
+        $values = array_reverse($values);
+        $r = pack("C*", ...$values);
+        return $r;
+    }
+
+    private static function ensureMinimalEncoding($binaryData, $offsetIndex)
+    {
+        // All the first nine bits cannot equal 0 or 1, which would
+        // be non-minimal encoding for positive and negative integers respectively
+        if ((ord($binaryData[$offsetIndex]) == 0x00 && (ord($binaryData[$offsetIndex+1]) & 0x80) == 0) ||
+            (ord($binaryData[$offsetIndex]) == 0xff && (ord($binaryData[$offsetIndex+1]) & 0x80) == 0x80)) {
+            throw new ParserException("Integer not minimally encoded", $offsetIndex);
+        }
+    }
+
+    public static function fromBinary(&$binaryData, &$offsetIndex = 0)
+    {
+        $parsedObject = new static(0);
+        self::parseIdentifier($binaryData[$offsetIndex], $parsedObject->getType(), $offsetIndex++);
+        $contentLength = self::parseContentLength($binaryData, $offsetIndex, 1);
+
+        if ($contentLength > 1) {
+            self::ensureMinimalEncoding($binaryData, $offsetIndex);
+        }
+        $isNegative = (ord($binaryData[$offsetIndex]) & 0x80) != 0x00;
+        $number = BigInteger::create(ord($binaryData[$offsetIndex++]) & 0x7F);
+
+        for ($i = 0; $i < $contentLength - 1; $i++) {
+            $number = $number->multiply(0x100)->add(ord($binaryData[$offsetIndex++]));
+        }
+
+        if ($isNegative) {
+            $number = $number->subtract(BigInteger::create(2)->toPower(8 * $contentLength - 1));
+        }
+
+        $parsedObject = new static((string)$number);
+        $parsedObject->setContentLength($contentLength);
+
+        return $parsedObject;
+    }
+}