allow vendord

vendor/google/auth/src/IamSignerTrait.php

@@ -0,0 +1,72 @@
+<?php
+
+/*
+ * Copyright 2022 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Google\Auth;
+
+use Exception;
+use Google\Auth\HttpHandler\HttpClientCache;
+use Google\Auth\HttpHandler\HttpHandlerFactory;
+
+trait IamSignerTrait
+{
+    /**
+     * @var Iam|null
+     */
+    private $iam;
+
+    /**
+     * Sign a string using the default service account private key.
+     *
+     * This implementation uses IAM's signBlob API.
+     *
+     * @see https://cloud.google.com/iam/credentials/reference/rest/v1/projects.serviceAccounts/signBlob SignBlob
+     *
+     * @param string $stringToSign The string to sign.
+     * @param bool $forceOpenSsl [optional] Does not apply to this credentials
+     *        type.
+     * @param string $accessToken The access token to use to sign the blob. If
+     *        provided, saves a call to the metadata server for a new access
+     *        token. **Defaults to** `null`.
+     * @return string
+     * @throws Exception
+     */
+    public function signBlob($stringToSign, $forceOpenSsl = false, $accessToken = null)
+    {
+        $httpHandler = HttpHandlerFactory::build(HttpClientCache::getHttpClient());
+
+        // Providing a signer is useful for testing, but it's undocumented
+        // because it's not something a user would generally need to do.
+        $signer = $this->iam;
+        if (!$signer) {
+            $signer = $this instanceof GetUniverseDomainInterface
+                ? new Iam($httpHandler, $this->getUniverseDomain())
+                : new Iam($httpHandler);
+        }
+
+        $email = $this->getClientName($httpHandler);
+
+        if (is_null($accessToken)) {
+            $previousToken = $this->getLastReceivedToken();
+            $accessToken = $previousToken
+                ? $previousToken['access_token']
+                : $this->fetchAuthToken($httpHandler)['access_token'];
+        }
+
+        return $signer->signBlob($email, $accessToken, $stringToSign);
+    }
+}