1 files changed, 93 insertions, 0 deletions
diff --git a/vendor/web-token/jwt-core/Util/ECSignature.php b/vendor/web-token/jwt-core/Util/ECSignature.php
new file mode 100644
index 0000000..5bfa5b0
--- /dev/null
+++ b/vendor/web-token/jwt-core/Util/ECSignature.php
@@ -0,0 +1,93 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2018 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace Jose\Component\Core\Util;
+
+/**
+ * @internal
+ */
+class ECSignature
+{
+    public static function toDER(string $signature, int $partLength): string
+    {
+        $signature = \unpack('H*', $signature)[1];
+        if (\mb_strlen($signature, '8bit') !== 2 * $partLength) {
+            throw new \InvalidArgumentException('Invalid length.');
+        }
+        $R = \mb_substr($signature, 0, $partLength, '8bit');
+        $S = \mb_substr($signature, $partLength, null, '8bit');
+
+        $R = self::preparePositiveInteger($R);
+        $Rl = \mb_strlen($R, '8bit') / 2;
+        $S = self::preparePositiveInteger($S);
+        $Sl = \mb_strlen($S, '8bit') / 2;
+        $der = \pack('H*',
+            '30'.($Rl + $Sl + 4 > 128 ? '81' : '').\dechex($Rl + $Sl + 4)
+            .'02'.\dechex($Rl).$R
+            .'02'.\dechex($Sl).$S
+        );
+
+        return $der;
+    }
+
+    public static function fromDER(string $der, int $partLength): string
+    {
+        $hex = \unpack('H*', $der)[1];
+        if ('30' !== \mb_substr($hex, 0, 2, '8bit')) { // SEQUENCE
+            throw new \RuntimeException();
+        }
+        if ('81' === \mb_substr($hex, 2, 2, '8bit')) { // LENGTH > 128
+            $hex = \mb_substr($hex, 6, null, '8bit');
+        } else {
+            $hex = \mb_substr($hex, 4, null, '8bit');
+        }
+        if ('02' !== \mb_substr($hex, 0, 2, '8bit')) { // INTEGER
+            throw new \RuntimeException();
+        }
+
+        $Rl = \hexdec(\mb_substr($hex, 2, 2, '8bit'));
+        $R = self::retrievePositiveInteger(\mb_substr($hex, 4, $Rl * 2, '8bit'));
+        $R = \str_pad($R, $partLength, '0', STR_PAD_LEFT);
+
+        $hex = \mb_substr($hex, 4 + $Rl * 2, null, '8bit');
+        if ('02' !== \mb_substr($hex, 0, 2, '8bit')) { // INTEGER
+            throw new \RuntimeException();
+        }
+        $Sl = \hexdec(\mb_substr($hex, 2, 2, '8bit'));
+        $S = self::retrievePositiveInteger(\mb_substr($hex, 4, $Sl * 2, '8bit'));
+        $S = \str_pad($S, $partLength, '0', STR_PAD_LEFT);
+
+        return \pack('H*', $R.$S);
+    }
+
+    private static function preparePositiveInteger(string $data): string
+    {
+        if (\mb_substr($data, 0, 2, '8bit') > '7f') {
+            return '00'.$data;
+        }
+        while ('00' === \mb_substr($data, 0, 2, '8bit') && \mb_substr($data, 2, 2, '8bit') <= '7f') {
+            $data = \mb_substr($data, 2, null, '8bit');
+        }
+
+        return $data;
+    }
+
+    private static function retrievePositiveInteger(string $data): string
+    {
+        while ('00' === \mb_substr($data, 0, 2, '8bit') && \mb_substr($data, 2, 2, '8bit') > '7f') {
+            $data = \mb_substr($data, 2, null, '8bit');
+        }
+
+        return $data;
+    }
+}