Implement gnome-keyring for OSCrypt

components/os_crypt/keyring_util_linux.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_OS_CRYPT_KEYRING_UTIL_LINUX_H_
 #define COMPONENTS_OS_CRYPT_KEYRING_UTIL_LINUX_H_
 
 // libgnome-keyring has been deprecated in favor of libsecret.
 // See: https://mail.gnome.org/archives/commits-list/2013-October/msg08876.html
 //
 // The define below turns off the deprecations, in order to avoid build
 // failures with Gnome 3.12. When we move to libsecret, the define can be
 // removed, together with the include below it.
 //
 // The porting is tracked in http://crbug.com/355223
 #define GNOME_KEYRING_DEPRECATED
 #define GNOME_KEYRING_DEPRECATED_FOR(x)
 #include <gnome-keyring.h>
 
 #include "base/macros.h"
 
 // Many of the gnome_keyring_* functions use variable arguments, which makes
 // them difficult if not impossible to truly wrap in C. Therefore, we use
 // appropriately-typed function pointers and scoping to make the fact that we
 // might be dynamically loading the library almost invisible. As a bonus, we
 // also get a simple way to mock the library for testing. Classes that inherit
 // from GnomeKeyringLoader will use its versions of the gnome_keyring_*
 // functions. Note that it has only static fields.
 class GnomeKeyringLoader {
- protected:
+ public:
   static bool LoadGnomeKeyring();
 
   // Declare the actual function pointers that we'll use in client code.
+  // These functions will contact the service.
   static decltype(&::gnome_keyring_is_available) gnome_keyring_is_available_ptr;
   static decltype(
       &::gnome_keyring_store_password) gnome_keyring_store_password_ptr;
   static decltype(
       &::gnome_keyring_delete_password) gnome_keyring_delete_password_ptr;
   static decltype(&::gnome_keyring_find_items) gnome_keyring_find_items_ptr;
   static decltype(
+      &::gnome_keyring_find_password_sync) gnome_keyring_find_password_sync_ptr;
+  static decltype(&::gnome_keyring_store_password_sync)
+      gnome_keyring_store_password_sync_ptr;
+
+  // These functions do not contact the service.
+  static decltype(
       &::gnome_keyring_result_to_message) gnome_keyring_result_to_message_ptr;
   static decltype(&::gnome_keyring_attribute_list_free)
       gnome_keyring_attribute_list_free_ptr;
   static decltype(
       &::gnome_keyring_attribute_list_new) gnome_keyring_attribute_list_new_ptr;
   static decltype(&::gnome_keyring_attribute_list_append_string)
       gnome_keyring_attribute_list_append_string_ptr;
   static decltype(&::gnome_keyring_attribute_list_append_uint32)
       gnome_keyring_attribute_list_append_uint32_ptr;
+  static decltype(
+      &::gnome_keyring_free_password) gnome_keyring_free_password_ptr;
   // We also use gnome_keyring_attribute_list_index(), which is a macro and
   // can't be referenced.
 
+ protected:
   // Set to true if LoadGnomeKeyring() has already succeeded.
   static bool keyring_loaded;
 
  private:
   struct FunctionInfo {
     const char* name;
     void** pointer;
   };
 
   // Make it easy to initialize the function pointers in LoadGnomeKeyring().
   static const FunctionInfo functions[];
 };
 
 #endif  // COMPONENTS_OS_CRYPT_KEYRING_UTIL_LINUX_H_