20181129 deployment

Author: senthilkumar-muthusamy

examples/consumer-authentication/JWT.php

@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * JWT encoding
+ *
+ * PHP Version 5.2+
+ *
+ * @category Authentication
+ * @package  HPS
+ * @author   Heartland Payment Systems <entapp_devportal@e-hps.com>
+ * @license  Custom https://github.com/hps/heartland-php/blob/master/LICENSE.txt
+ * @link     https://developer.heartlandpaymentsystems.com
+ */
+
+class JWT
+{
+    /**
+     * Encodes a JWT with a `$key` and a `$payload`
+     *
+     * @param string $key     key used to sign the JWT
+     * @param mixed  $payload payload to be included
+     *
+     * @return string
+     */
+    public static function encode($key = '', $payload = array())
+    {
+        $header = array('typ' => 'JWT', 'alg' => 'HS256');
+
+        $parts = array(
+            self::urlsafeBase64Encode(json_encode($header)),
+            self::urlsafeBase64Encode(json_encode($payload)),
+        );
+        $signingData = implode('.', $parts);
+        $signature = self::sign($key, $signingData);
+        $parts[] = self::urlsafeBase64Encode($signature);
+
+        return implode('.', $parts);
+    }
+
+    /**
+     * Creates a url-safe base64 encoded AnyValuesToken
+     *
+     * @param string $data data to be encoded
+     *
+     * @return string
+     */
+    public static function urlsafeBase64Encode($data)
+    {
+        return str_replace('=', '', strtr(base64_encode($data), '+/', '-_'));
+    }
+
+    /**
+     * Signs a set of `$signingData` with a given `$key`
+     *
+     * @param string $key         key used to sign the JWT
+     * @param string $signingData data to be signed
+     *
+     * @return string
+     */
+    public static function sign($key, $signingData)
+    {
+        return hash_hmac('sha256', $signingData, $key, true);
+    }
+};