4 files changed, 154 insertions, 0 deletions
diff --git a/vendor/mmccook/php-json-canonicalization-scheme/src/JsonCanonicalizator.php b/vendor/mmccook/php-json-canonicalization-scheme/src/JsonCanonicalizator.php
new file mode 100644
index 000000000..6a3c82959
--- /dev/null
+++ b/vendor/mmccook/php-json-canonicalization-scheme/src/JsonCanonicalizator.php
@@ -0,0 +1,79 @@
+<?php
+
+namespace Mmccook\JsonCanonicalizator;
+
+class JsonCanonicalizator implements JsonCanonicalizatorInterface
+{
+    public const JSON_FLAGS = \JSON_UNESCAPED_UNICODE | \JSON_UNESCAPED_SLASHES;
+
+    /**
+     * @param $data
+     * @param bool $asHex
+     * @return string
+     */
+    public function canonicalize($data, bool $asHex = false): string
+    {
+        ob_start();
+
+        $this->serialize($data);
+
+        $result = ob_get_clean();
+
+        return $asHex ? Utils::asHex($result) : $result;
+    }
+
+    private function serialize($item)
+    {
+        if (is_float($item)) {
+            echo Utils::es6NumberFormat($item);
+
+            return;
+        }
+
+        if (null === $item || is_scalar($item)) {
+            echo json_encode($item, self::JSON_FLAGS);
+
+            return;
+        }
+
+        if (is_array($item) && ! Utils::isAssoc($item)) {
+            echo '[';
+            $next = false;
+            foreach ($item as $element) {
+                if ($next) {
+                    echo ',';
+                }
+                $next = true;
+                $this->serialize($element);
+            }
+            echo ']';
+
+            return;
+        }
+
+        if (is_object($item)) {
+            $item = (array)$item;
+        }
+
+        uksort($item, function (string $a, string $b) {
+            $a = mb_convert_encoding($a, 'UTF-16BE');
+            $b = mb_convert_encoding($b, 'UTF-16BE');
+
+            return strcmp($a, $b);
+        });
+
+        echo '{';
+        $next = false;
+        foreach ($item as $key => $value) {
+            //var_dump($key, $value);
+            if ($next) {
+                echo ',';
+            }
+            $next = true;
+            $outKey = json_encode((string)$key, self::JSON_FLAGS);
+            echo $outKey, ':', $this->serialize($value);
+        }
+        echo '}';
+
+    }
+}
diff --git a/vendor/mmccook/php-json-canonicalization-scheme/src/JsonCanonicalizatorFactory.php b/vendor/mmccook/php-json-canonicalization-scheme/src/JsonCanonicalizatorFactory.php
new file mode 100644
index 000000000..68b1c50c9
--- /dev/null
+++ b/vendor/mmccook/php-json-canonicalization-scheme/src/JsonCanonicalizatorFactory.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mmccook\JsonCanonicalizator;
+
+class JsonCanonicalizatorFactory
+{
+    public static function getInstance(): JsonCanonicalizator
+    {
+        return new JsonCanonicalizator();
+    }
+}
diff --git a/vendor/mmccook/php-json-canonicalization-scheme/src/JsonCanonicalizatorInterface.php b/vendor/mmccook/php-json-canonicalization-scheme/src/JsonCanonicalizatorInterface.php
new file mode 100644
index 000000000..73b25c086
--- /dev/null
+++ b/vendor/mmccook/php-json-canonicalization-scheme/src/JsonCanonicalizatorInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mmccook\JsonCanonicalizator;
+
+interface JsonCanonicalizatorInterface
+{
+    public function canonicalize($data, bool $asHex): string;
+}
diff --git a/vendor/mmccook/php-json-canonicalization-scheme/src/Utils.php b/vendor/mmccook/php-json-canonicalization-scheme/src/Utils.php
new file mode 100644
index 000000000..57079df3b
--- /dev/null
+++ b/vendor/mmccook/php-json-canonicalization-scheme/src/Utils.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace Mmccook\JsonCanonicalizator;
+
+class Utils
+{
+    /**
+     * @param array $array
+     * @return bool
+     */
+    public static function isAssoc(array $array): bool
+    {
+        $keys = array_keys($array);
+
+        return array_keys($keys) !== $keys;
+    }
+
+    public static function asHex(string $data): string
+    {
+        return rtrim(chunk_split(bin2hex($data), 2, ' '));
+    }
+
+    public static function es6NumberFormat(float $number): string
+    {
+
+        if (is_nan($number) || is_infinite($number)) {
+            throw new \RuntimeException("can't use Nan or Infinity in json");
+        }
+
+        if (0.0 === $number) {
+            return '0';
+        }
+
+        $sign = '';
+        if ($number < 0) {
+            $sign = '-';
+            $number = -$number;
+        }
+
+        if ($number < 1e+21 && $number >= 1e-6) {
+            $formatted = number_format($number, 7, '.', '');
+            $formatted = rtrim($formatted, '.0');
+        } else {
+            $formatted = sprintf('%e', $number);
+            $parts = explode('e', $formatted);
+            $parts[0] = rtrim($parts[0], '.0');
+            $formatted = implode('e', $parts);
+        }
+
+        return $sign . $formatted;
+    }
+}