1 // Copyright 2017 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "components/login/secure_module_util_chromeos.h"
8 #include "base/files/file_path.h"
9 #include "base/files/file_util.h"
10 #include "base/task/thread_pool.h"
16 // If either of these two files exist, then we are using Cr50 and not using TPM.
17 constexpr char kCr50UsedIndicatorFile1[] =
18 "/opt/google/cr50/firmware/cr50.bin.prod";
19 constexpr char kCr50UsedIndicatorFile2[] = "/etc/init/cr50-update.conf";
21 SecureModuleUsed g_secure_module_used = SecureModuleUsed::UNQUERIED;
23 SecureModuleUsed GetSecureModuleInfoFromFilesAndCacheIt() {
24 if (base::PathExists(base::FilePath(kCr50UsedIndicatorFile1)) ||
25 base::PathExists(base::FilePath(kCr50UsedIndicatorFile2))) {
26 g_secure_module_used = SecureModuleUsed::CR50;
28 g_secure_module_used = SecureModuleUsed::TPM;
30 return g_secure_module_used;
35 void GetSecureModuleUsed(GetSecureModuleUsedCallback callback) {
36 if (g_secure_module_used != SecureModuleUsed::UNQUERIED) {
37 std::move(callback).Run(g_secure_module_used);
41 base::ThreadPool::PostTaskAndReplyWithResult(
42 FROM_HERE, {base::MayBlock(), base::TaskPriority::BEST_EFFORT},
43 base::BindOnce(&GetSecureModuleInfoFromFilesAndCacheIt),