OSCrypt for POSIX uses libsecret to store a randomised encryption key.

components/os_crypt/libsecret_util_posix.h

Index: components/os_crypt/libsecret_util_posix.h
diff --git a/components/os_crypt/libsecret_util_posix.h b/components/os_crypt/libsecret_util_posix.h
deleted file mode 100644
index 0d265be940fcd6115c847020564509309ca62ad5..0000000000000000000000000000000000000000
--- a/components/os_crypt/libsecret_util_posix.h
+++ /dev/null
@@ -1,83 +0,0 @@
-// 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_LIBSECRET_UTIL_POSIX_H_
-#define COMPONENTS_OS_CRYPT_LIBSECRET_UTIL_POSIX_H_
-
-#include <libsecret/secret.h>
-
-#include <list>
-#include <string>
-
-#include "base/macros.h"
-
-// Utility for dynamically loading libsecret.
-class LibsecretLoader {
- public:
-  static decltype(&::secret_password_store_sync) secret_password_store_sync;
-  static decltype(&::secret_service_search_sync) secret_service_search_sync;
-  static decltype(&::secret_password_clear_sync) secret_password_clear_sync;
-  static decltype(&::secret_item_get_secret) secret_item_get_secret;
-  static decltype(&::secret_value_get_text) secret_value_get_text;
-  static decltype(&::secret_item_get_attributes) secret_item_get_attributes;
-  static decltype(&::secret_item_load_secret_sync) secret_item_load_secret_sync;
-  static decltype(&::secret_value_unref) secret_value_unref;
-
-  // Loads the libsecret library and checks that it responds to queries.
-  // Returns false if either step fails.
-  // Repeated calls check the responsiveness every time, but do not load the
-  // the library again if already successful.
-  static bool EnsureLibsecretLoaded();
-
- protected:
-  static bool libsecret_loaded_;
-
- private:
-  struct FunctionInfo {
-    const char* name;
-    void** pointer;
-  };
-
-  static const FunctionInfo kFunctions[];
-
-  // Load the libsecret binaries. Returns true on success.
-  // If successful, the result is cached and the function can be safely called
-  // multiple times.
-  // Checking |LibsecretIsAvailable| is necessary after this to verify that the
-  // service responds to queries.
-  static bool LoadLibsecret();
-
-  // True if the libsecret binaries have been loaded and the library responds
-  // to queries.
-  static bool LibsecretIsAvailable();
-
-  DISALLOW_IMPLICIT_CONSTRUCTORS(LibsecretLoader);
-};
-
-class LibsecretAttributesBuilder {
- public:
-  LibsecretAttributesBuilder();
-  ~LibsecretAttributesBuilder();
-
-  void Append(const std::string& name, const std::string& value);
-
-  void Append(const std::string& name, int64_t value);
-
-  // GHashTable, its keys and values returned from Get() are destroyed in
-  // |LibsecretAttributesBuilder| destructor.
-  GHashTable* Get() { return attrs_; }
-
- private:
-  // |name_values_| is a storage for strings referenced in |attrs_|.
-  // TODO(crbug.com/607950): Make implementation more robust by not depending on
-  // the implementation details of containers. External objects keep references
-  // to the objects stored in this container. Using a vector here will fail the
-  // ASan tests, because it may move the objects and break the references.
-  std::list<std::string> name_values_;
-  GHashTable* attrs_;
-
-  DISALLOW_COPY_AND_ASSIGN(LibsecretAttributesBuilder);
-};
-
-#endif  // COMPONENTS_OS_CRYPT_LIBSECRET_UTIL_POSIX_H_