Changed location of LibsecretLoader

components/os_crypt/libsecret_util_posix.cc

+// 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.
+
+#include "components/os_crypt/libsecret_util_posix.h"
+
+#include <dlfcn.h>
+
+#include "base/logging.h"
+#include "base/strings/string_number_conversions.h"
+
+decltype(
+    &::secret_password_store_sync) LibsecretLoader::secret_password_store_sync;
+decltype(
+    &::secret_service_search_sync) LibsecretLoader::secret_service_search_sync;
+decltype(
+    &::secret_password_clear_sync) LibsecretLoader::secret_password_clear_sync;
+decltype(&::secret_item_get_secret) LibsecretLoader::secret_item_get_secret;
+decltype(&::secret_value_get_text) LibsecretLoader::secret_value_get_text;
+decltype(
+    &::secret_item_get_attributes) LibsecretLoader::secret_item_get_attributes;
+decltype(&::secret_item_load_secret_sync)
+    LibsecretLoader::secret_item_load_secret_sync;
+decltype(&::secret_value_unref) LibsecretLoader::secret_value_unref;
+
+bool LibsecretLoader::libsecret_loaded = false;
+
+const LibsecretLoader::FunctionInfo LibsecretLoader::functions[] = {
+    {"secret_password_store_sync",
+     reinterpret_cast<void**>(&secret_password_store_sync)},
+    {"secret_service_search_sync",
+     reinterpret_cast<void**>(&secret_service_search_sync)},
+    {"secret_password_clear_sync",
+     reinterpret_cast<void**>(&secret_password_clear_sync)},
+    {"secret_item_get_secret",
+     reinterpret_cast<void**>(&secret_item_get_secret)},
+    {"secret_value_get_text", reinterpret_cast<void**>(&secret_value_get_text)},
+    {"secret_item_get_attributes",
+     reinterpret_cast<void**>(&secret_item_get_attributes)},
+    {"secret_item_load_secret_sync",
+     reinterpret_cast<void**>(&secret_item_load_secret_sync)},
+    {"secret_value_unref", reinterpret_cast<void**>(&secret_value_unref)}};
+
+// static
+bool LibsecretLoader::LoadLibsecret() {
+  if (libsecret_loaded)
+    return true;
+
+  void* handle = dlopen("libsecret-1.so.0", RTLD_NOW | RTLD_GLOBAL);
+  if (!handle) {
+    // We wanted to use libsecret, but we couldn't load it. Warn, because
+    // either the user asked for this, or we autodetected it incorrectly. (Or
+    // the system has broken libraries, which is also good to warn about.)
+    // TODO(crbug.com/607435): Channel this message to the user-facing log
+    VLOG(1) << "Could not load libsecret-1.so.0: " << dlerror();
+    return false;
+  }
+
+  for (const auto& function : functions) {
+    dlerror();
+    *function.pointer = dlsym(handle, function.name);
+    const char* error = dlerror();
+    if (error) {
+      VLOG(1) << "Unable to load symbol " << function.name << ": " << error;
+      dlclose(handle);
+      return false;
+    }
+  }
+
+  libsecret_loaded = true;
+  // We leak the library handle. That's OK: this function is called only once.
+  return true;
+}
+
+// static
+bool LibsecretLoader::LibsecretIsAvailable() {
+  if (!libsecret_loaded)
+    return false;
+  // A dummy query is made to check for availability, because libsecret doesn't
+  // have a dedicated availability function. For performance reasons, the query
+  // is meant to return an empty result.
+  LibsecretAttributesBuilder attrs;
+  attrs.Append("application", "chrome-string_to_get_empty_result");
+  const SecretSchema dummySchema = {
+      "_chrome_dummy_schema",
+      SECRET_SCHEMA_DONT_MATCH_NAME,
+      {{nullptr, SECRET_SCHEMA_ATTRIBUTE_STRING}}};
+
+  GError* error = nullptr;
+  GList* found =
+      secret_service_search_sync(nullptr,  // default secret service
+                                 &dummySchema, attrs.Get(), SECRET_SEARCH_ALL,
+                                 nullptr,  // no cancellable ojbect
+                                 &error);
+  bool success = (error == nullptr);
+  if (error)
+    g_error_free(error);
+  if (found)
+    g_list_free(found);
+
+  return success;
+}
+
+LibsecretAttributesBuilder::LibsecretAttributesBuilder() {
+  attrs_ = g_hash_table_new_full(g_str_hash, g_str_equal,
+                                 nullptr,   // no deleter for keys
+                                 nullptr);  // no deleter for values
+}
+
+LibsecretAttributesBuilder::~LibsecretAttributesBuilder() {
+  g_hash_table_destroy(attrs_);
+}
+
+void LibsecretAttributesBuilder::Append(const std::string& name,
+                                        const std::string& value) {
+  name_values_.push_back(name);
+  gpointer name_str =
+      static_cast<gpointer>(const_cast<char*>(name_values_.back().c_str()));
+  name_values_.push_back(value);
+  gpointer value_str =
+      static_cast<gpointer>(const_cast<char*>(name_values_.back().c_str()));
+  g_hash_table_insert(attrs_, name_str, value_str);
+}
+
+void LibsecretAttributesBuilder::Append(const std::string& name,
+                                        int64_t value) {
+  Append(name, base::Int64ToString(value));
+}