GHA Project Maintenance (#8632)

* Update storage secrets

* Rotate FIREGSignInInfo.h

* Rotate Auth credentials

* Add script for encrypting secrets

* Trigger auth GHA

* Update auth.yml

* Update encrypt_gha_secret.sh

scripts/encrypt_gha_secret.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+# Copyright 2021 Google LLC
+#
+# 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.
+
+# $1 is the file to encrypt
+# $2 is the passphrase
+
+# Encrypt the file
+# See https://docs.github.com/en/actions/reference/encrypted-secrets for more details.
+# --batch to prevent interactive command
+
+file="$1"
+passphrase="$2"
+[ -z "$passphrase" ] || \
+  gpg --batch --passphrase="$passphrase" --symmetric --cipher-algo AES256 $file