1 // Copyright 2017 The Chromium Authors. All rights reserved.
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/callback_helpers.h"
9 #include "base/files/file_path.h"
10 #include "base/files/file_util.h"
11 #include "base/task/post_task.h"
17 // If either of these two files exist, then we are using Cr50 and not using TPM.
18 constexpr char kCr50UsedIndicatorFile1[] =
19 "/opt/google/cr50/firmware/cr50.bin.prod";
20 constexpr char kCr50UsedIndicatorFile2[] = "/etc/init/cr50-update.conf";
22 SecureModuleUsed g_secure_module_used = SecureModuleUsed::UNQUERIED;
24 SecureModuleUsed GetSecureModuleInfoFromFilesAndCacheIt() {
25 if (base::PathExists(base::FilePath(kCr50UsedIndicatorFile1)) ||
26 base::PathExists(base::FilePath(kCr50UsedIndicatorFile2))) {
27 g_secure_module_used = SecureModuleUsed::CR50;
29 g_secure_module_used = SecureModuleUsed::TPM;
31 return g_secure_module_used;
36 void GetSecureModuleUsed(GetSecureModuleUsedCallback callback) {
37 if (g_secure_module_used != SecureModuleUsed::UNQUERIED) {
38 base::ResetAndReturn(&callback).Run(g_secure_module_used);
42 base::PostTaskWithTraitsAndReplyWithResult(
43 FROM_HERE, {base::MayBlock(), base::TaskPriority::BEST_EFFORT},
44 base::BindOnce(&GetSecureModuleInfoFromFilesAndCacheIt),