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- // Copyright 2017 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/login/secure_module_util_chromeos.h"
- #include "base/bind.h"
- #include "base/files/file_path.h"
- #include "base/files/file_util.h"
- #include "base/task/thread_pool.h"
- namespace login {
- namespace {
- // If either of these two files exist, then we are using Cr50 and not using TPM.
- constexpr char kCr50UsedIndicatorFile1[] =
- "/opt/google/cr50/firmware/cr50.bin.prod";
- constexpr char kCr50UsedIndicatorFile2[] = "/etc/init/cr50-update.conf";
- SecureModuleUsed g_secure_module_used = SecureModuleUsed::UNQUERIED;
- SecureModuleUsed GetSecureModuleInfoFromFilesAndCacheIt() {
- if (base::PathExists(base::FilePath(kCr50UsedIndicatorFile1)) ||
- base::PathExists(base::FilePath(kCr50UsedIndicatorFile2))) {
- g_secure_module_used = SecureModuleUsed::CR50;
- } else {
- g_secure_module_used = SecureModuleUsed::TPM;
- }
- return g_secure_module_used;
- }
- } // namespace
- void GetSecureModuleUsed(GetSecureModuleUsedCallback callback) {
- if (g_secure_module_used != SecureModuleUsed::UNQUERIED) {
- std::move(callback).Run(g_secure_module_used);
- return;
- }
- base::ThreadPool::PostTaskAndReplyWithResult(
- FROM_HERE, {base::MayBlock(), base::TaskPriority::BEST_EFFORT},
- base::BindOnce(&GetSecureModuleInfoFromFilesAndCacheIt),
- std::move(callback));
- }
- } // namespace login
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