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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+interface mozIDOMWindow;
+
+[scriptable, uuid(4fe082ae-6ff0-4b41-b24f-eaa664f6e46a)]
+interface nsIOSReauthenticator: nsISupports {
+ /**
+ * This interface provides an abstract way to request that the user
+ * reauthenticate themselves to the operating system. It may be useful in
+ * conjunction with nsIOSKeyStore, whereby consumers of these APIs may
+ * consider some secrets too sensitive to access without first
+ * reauthenticating the user.
+ *
+ * Usage:
+ *
+ * // obtain the singleton nsIOSReauthenticator instance
+ * const reauthenticator = Cc["@mozilla.org/security/osreauthenticator;1"]
+ * .getService(Ci.nsIOSReauthenticator);
+ * if (await reauthenticator.asyncReauthenticate()) {
+ * // do something only authenticated users are allowed to do...
+ * } else {
+ * // show a "sorry, this isn't allowed" error
+ * }
+ */
+
+ /**
+ * Asynchronously cause the operating system to request that the user
+ * reauthenticate. This is typically in the form of a dialog box asking the
+ * user for their login password. The actual behaviour of this depends on the
+ * OS.
+ *
+ * @param prompt A short string that may be incorporated in the dialog
+ * @param caption A short string that may be shown as the dialog caption (usually Product Name)
+ * @param parentWindow Used to associate the OS dialog with the calling window.
+ * @return Promise resolving to true if the user successfully authenticated
+ * and false otherwise.
+ */
+ [implicit_jscontext, must_use]
+ Promise asyncReauthenticateUser(in AString prompt, in AString caption, in mozIDOMWindow parentWindow);
+};