1 files changed, 63 insertions, 0 deletions
diff --git a/vendor/minishlink/web-push/src/Utils.php b/vendor/minishlink/web-push/src/Utils.php
new file mode 100644
index 0000000..30c2018
--- /dev/null
+++ b/vendor/minishlink/web-push/src/Utils.php
@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the WebPush library.
+ *
+ * (c) Louis Lagrange <lagrange.louis@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Minishlink\WebPush;
+
+use Jose\Component\Core\Util\Ecc\PublicKey;
+
+class Utils
+{
+    /**
+     * @param string $value
+     *
+     * @return int
+     */
+    public static function safeStrlen(string $value): int
+    {
+        return mb_strlen($value, '8bit');
+    }
+
+    /**
+     * @param PublicKey $publicKey
+     *
+     * @return string
+     */
+    public static function serializePublicKey(PublicKey $publicKey): string
+    {
+        $hexString = '04';
+        $hexString .= str_pad(gmp_strval($publicKey->getPoint()->getX(), 16), 64, '0', STR_PAD_LEFT);
+        $hexString .= str_pad(gmp_strval($publicKey->getPoint()->getY(), 16), 64, '0', STR_PAD_LEFT);
+
+        return $hexString;
+    }
+
+    /**
+     * @param string $data
+     *
+     * @return array
+     */
+    public static function unserializePublicKey(string $data): array
+    {
+        $data = bin2hex($data);
+        if (mb_substr($data, 0, 2, '8bit') !== '04') {
+            throw new \InvalidArgumentException('Invalid data: only uncompressed keys are supported.');
+        }
+        $data = mb_substr($data, 2, null, '8bit');
+        $dataLength = self::safeStrlen($data);
+
+        return [
+            hex2bin(mb_substr($data, 0, $dataLength / 2, '8bit')),
+            hex2bin(mb_substr($data, $dataLength / 2, null, '8bit')),
+        ];
+    }
+}