N°3169 - Add feature to connect Gsuite mail box with OAuth

N°2504 - Add feature to connect Office mail box with OAuth2 for Microsoft Graph
N°5102 - Allow to send emails (eg. notifications) using GSuite SMTP and OAuth
 * 2.7 migration (wip)

lib/firebase/php-jwt/src/Key.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace Firebase\JWT;
+
+use InvalidArgumentException;
+use OpenSSLAsymmetricKey;
+
+class Key
+{
+    /** @var string $algorithm */
+    private $algorithm;
+
+    /** @var string|resource|OpenSSLAsymmetricKey $keyMaterial */
+    private $keyMaterial;
+
+    /**
+     * @param string|resource|OpenSSLAsymmetricKey $keyMaterial
+     * @param string $algorithm
+     */
+    public function __construct($keyMaterial, $algorithm)
+    {
+        if (
+            !is_string($keyMaterial)
+            && !is_resource($keyMaterial)
+            && !$keyMaterial instanceof OpenSSLAsymmetricKey
+        ) {
+            throw new InvalidArgumentException('Type error: $keyMaterial must be a string, resource, or OpenSSLAsymmetricKey');
+        }
+
+        if (empty($keyMaterial)) {
+            throw new InvalidArgumentException('Type error: $keyMaterial must not be empty');
+        }
+
+        if (!is_string($algorithm)|| empty($keyMaterial)) {
+            throw new InvalidArgumentException('Type error: $algorithm must be a string');
+        }
+
+        $this->keyMaterial = $keyMaterial;
+        $this->algorithm = $algorithm;
+    }
+
+    /**
+     * Return the algorithm valid for this key
+     *
+     * @return string
+     */
+    public function getAlgorithm()
+    {
+        return $this->algorithm;
+    }
+
+    /**
+     * @return string|resource|OpenSSLAsymmetricKey
+     */
+    public function getKeyMaterial()
+    {
+        return $this->keyMaterial;
+    }
+}