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// Copyright 2020 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 "chrome/browser/chromeos/system_token_cert_db_initializer.h"
#include <memory>
#include "base/bind.h"
#include "base/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/test/task_environment.h"
#include "base/time/time.h"
#include "chromeos/dbus/cryptohome/cryptohome_client.h"
#include "chromeos/dbus/tpm_manager/tpm_manager_client.h"
#include "chromeos/network/network_cert_loader.h"
#include "chromeos/tpm/tpm_token_loader.h"
#include "content/public/test/browser_task_environment.h"
#include "crypto/scoped_test_system_nss_key_slot.h"
#include "net/cert/nss_cert_database.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace chromeos {
namespace {
// A helper that wraps the callback passed to
// SystemTokenCertDBInitializer::GetSystemTokenCertDb and can answer queries
// regarding the state of the callback and database passed to the callback.
class GetSystemTokenCertDbCallbackWrapper {
public:
GetSystemTokenCertDbCallbackWrapper() = default;
GetSystemTokenCertDbCallbackWrapper(
const GetSystemTokenCertDbCallbackWrapper& other) = delete;
GetSystemTokenCertDbCallbackWrapper& operator=(
const GetSystemTokenCertDbCallbackWrapper& other) = delete;
~GetSystemTokenCertDbCallbackWrapper() = default;
SystemTokenCertDBInitializer::GetSystemTokenCertDbCallback GetCallback() {
return base::BindOnce(&GetSystemTokenCertDbCallbackWrapper::OnDbRetrieved,
weak_ptr_factory_.GetWeakPtr());
}
// Waits until the callback returned by GetCallback() has been called.
void Wait() { run_loop_.Run(); }
bool IsCallbackCalled() { return done_; }
bool IsDbRetrievalSucceeded() { return nss_cert_database_ != nullptr; }
private:
void OnDbRetrieved(net::NSSCertDatabase* nss_cert_database) {
EXPECT_FALSE(done_);
done_ = true;
nss_cert_database_ = nss_cert_database;
run_loop_.Quit();
}
base::RunLoop run_loop_;
bool done_ = false;
net::NSSCertDatabase* nss_cert_database_ = nullptr;
base::WeakPtrFactory<GetSystemTokenCertDbCallbackWrapper> weak_ptr_factory_{
this};
};
} // namespace
class SystemTokenCertDbInitializerTest : public testing::Test {
public:
SystemTokenCertDbInitializerTest() {
TPMTokenLoader::InitializeForTest();
CryptohomeClient::InitializeFake();
NetworkCertLoader::Initialize();
TpmManagerClient::InitializeFake();
system_token_cert_db_initializer_ =
std::make_unique<SystemTokenCertDBInitializer>();
}
SystemTokenCertDbInitializerTest(
const SystemTokenCertDbInitializerTest& other) = delete;
SystemTokenCertDbInitializerTest& operator=(
const SystemTokenCertDbInitializerTest& other) = delete;
~SystemTokenCertDbInitializerTest() override {
TpmManagerClient::Shutdown();
NetworkCertLoader::Shutdown();
CryptohomeClient::Shutdown();
TPMTokenLoader::Shutdown();
}
protected:
bool InitializeTestSystemSlot() {
test_system_slot_ = std::make_unique<crypto::ScopedTestSystemNSSKeySlot>();
return test_system_slot_->ConstructedSuccessfully();
}
SystemTokenCertDBInitializer* system_token_cert_db_initializer() {
return system_token_cert_db_initializer_.get();
}
base::test::TaskEnvironment* task_environment() { return &task_environment_; }
private:
content::BrowserTaskEnvironment task_environment_{
base::test::TaskEnvironment::TimeSource::MOCK_TIME};
std::unique_ptr<SystemTokenCertDBInitializer>
system_token_cert_db_initializer_;
std::unique_ptr<crypto::ScopedTestSystemNSSKeySlot> test_system_slot_;
};
// Tests that the system token certificate database will be returned
// successfully by SystemTokenCertDbInitializer if it was available in less than
// 5 minutes after being requested.
TEST_F(SystemTokenCertDbInitializerTest, GetSystemTokenCertDbSuccess) {
GetSystemTokenCertDbCallbackWrapper get_system_token_cert_db_callback_wrapper;
system_token_cert_db_initializer()->GetSystemTokenCertDb(
get_system_token_cert_db_callback_wrapper.GetCallback());
EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
// Check that after 1 minute, SystemTokenCertDBInitializer is still waiting
// for the system token slot to be initialized and the DB retrieval hasn't
// timed out yet.
const auto kOneMinuteDelay = base::TimeDelta::FromMinutes(1);
EXPECT_LT(kOneMinuteDelay,
SystemTokenCertDBInitializer::kMaxCertDbRetrievalDelay);
task_environment()->FastForwardBy(kOneMinuteDelay);
EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
EXPECT_TRUE(InitializeTestSystemSlot());
get_system_token_cert_db_callback_wrapper.Wait();
EXPECT_TRUE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
EXPECT_TRUE(
get_system_token_cert_db_callback_wrapper.IsDbRetrievalSucceeded());
}
// Tests that the system token certificate database will be returned
// successfully by SystemTokenCertDbInitializer if it was available in less than
// 5 minutes after being requested, and the system slot uses software fallback
// when it's allowed and TPM is disabled.
TEST_F(SystemTokenCertDbInitializerTest,
GetSystemTokenCertDbSuccessSoftwareFallback) {
TpmManagerClient::Get()
->GetTestInterface()
->mutable_nonsensitive_status_reply()
->set_is_enabled(false);
TpmManagerClient::Get()
->GetTestInterface()
->mutable_nonsensitive_status_reply()
->set_is_owned(false);
system_token_cert_db_initializer()
->set_is_system_slot_software_fallback_allowed(true);
GetSystemTokenCertDbCallbackWrapper get_system_token_cert_db_callback_wrapper;
system_token_cert_db_initializer()->GetSystemTokenCertDb(
get_system_token_cert_db_callback_wrapper.GetCallback());
EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
// Check that after 1 minute, SystemTokenCertDBInitializer is still waiting
// for the system token slot to be initialized and the DB retrieval hasn't
// timed out yet.
const auto kOneMinuteDelay = base::TimeDelta::FromMinutes(1);
EXPECT_LT(kOneMinuteDelay,
SystemTokenCertDBInitializer::kMaxCertDbRetrievalDelay);
task_environment()->FastForwardBy(kOneMinuteDelay);
EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
EXPECT_TRUE(InitializeTestSystemSlot());
get_system_token_cert_db_callback_wrapper.Wait();
EXPECT_TRUE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
EXPECT_TRUE(
get_system_token_cert_db_callback_wrapper.IsDbRetrievalSucceeded());
}
// Tests that the system token certificate database will be not returned
// successfully by SystemTokenCertDbInitializer if TPM is disabled and system
// slot software fallback is not allowed.
TEST_F(SystemTokenCertDbInitializerTest,
GetSystemTokenCertDbFailureDisabledTPM) {
TpmManagerClient::Get()
->GetTestInterface()
->mutable_nonsensitive_status_reply()
->set_is_enabled(false);
TpmManagerClient::Get()
->GetTestInterface()
->mutable_nonsensitive_status_reply()
->set_is_owned(false);
system_token_cert_db_initializer()
->set_is_system_slot_software_fallback_allowed(false);
GetSystemTokenCertDbCallbackWrapper get_system_token_cert_db_callback_wrapper;
system_token_cert_db_initializer()->GetSystemTokenCertDb(
get_system_token_cert_db_callback_wrapper.GetCallback());
EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
// Check that after 1 minute, SystemTokenCertDBInitializer is still waiting
// for the system token slot to be initialized and the DB retrieval hasn't
// timed out yet.
const auto kOneMinuteDelay = base::TimeDelta::FromMinutes(1);
EXPECT_LT(kOneMinuteDelay,
SystemTokenCertDBInitializer::kMaxCertDbRetrievalDelay);
task_environment()->FastForwardBy(kOneMinuteDelay);
EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
EXPECT_TRUE(InitializeTestSystemSlot());
get_system_token_cert_db_callback_wrapper.Wait();
EXPECT_TRUE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
EXPECT_FALSE(
get_system_token_cert_db_callback_wrapper.IsDbRetrievalSucceeded());
}
// Tests that the system token certificate database will be returned
// successfully by SystemTokenCertDbInitializer if it was available in less than
// 5 minutes after being requested even if the slot was available after more
// than 5 minutes from the initialization of SystemTokenCertDbInitializer.
TEST_F(SystemTokenCertDbInitializerTest,
GetSystemTokenCertDbLateRequestSuccess) {
// Simulate waiting for 6 minutes after the initialization of the
// SystemTokenCertDbInitializer.
const auto kSixMinuteDelay = base::TimeDelta::FromMinutes(6);
EXPECT_GT(kSixMinuteDelay,
SystemTokenCertDBInitializer::kMaxCertDbRetrievalDelay);
task_environment()->FastForwardBy(kSixMinuteDelay);
EXPECT_TRUE(InitializeTestSystemSlot());
GetSystemTokenCertDbCallbackWrapper get_system_token_cert_db_callback_wrapper;
system_token_cert_db_initializer()->GetSystemTokenCertDb(
get_system_token_cert_db_callback_wrapper.GetCallback());
get_system_token_cert_db_callback_wrapper.Wait();
EXPECT_TRUE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
EXPECT_TRUE(
get_system_token_cert_db_callback_wrapper.IsDbRetrievalSucceeded());
}
// Tests that the system token certificate database retrieval will fail if the
// system token initialization doesn't succeed within 5 minutes from the first
// database request.
TEST_F(SystemTokenCertDbInitializerTest, GetSystemTokenCertDbTimeout) {
GetSystemTokenCertDbCallbackWrapper get_system_token_cert_db_callback_wrapper;
system_token_cert_db_initializer()->GetSystemTokenCertDb(
get_system_token_cert_db_callback_wrapper.GetCallback());
EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
const auto kDelay1 = base::TimeDelta::FromMinutes(2);
EXPECT_LT(kDelay1, SystemTokenCertDBInitializer::kMaxCertDbRetrievalDelay);
const auto kDelay2 =
SystemTokenCertDBInitializer::kMaxCertDbRetrievalDelay - kDelay1;
task_environment()->FastForwardBy(kDelay1);
EXPECT_FALSE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
task_environment()->FastForwardBy(kDelay2);
EXPECT_TRUE(get_system_token_cert_db_callback_wrapper.IsCallbackCalled());
EXPECT_FALSE(
get_system_token_cert_db_callback_wrapper.IsDbRetrievalSucceeded());
}
// Tests that if one of the system token certificate database requests timed
// out, following requests will fail as well.
TEST_F(SystemTokenCertDbInitializerTest,
GetSystemTokenCertDbTimeoutMultipleRequests) {
GetSystemTokenCertDbCallbackWrapper
get_system_token_cert_db_callback_wrapper_1;
system_token_cert_db_initializer()->GetSystemTokenCertDb(
get_system_token_cert_db_callback_wrapper_1.GetCallback());
EXPECT_FALSE(get_system_token_cert_db_callback_wrapper_1.IsCallbackCalled());
task_environment()->FastForwardBy(
SystemTokenCertDBInitializer::kMaxCertDbRetrievalDelay);
EXPECT_TRUE(get_system_token_cert_db_callback_wrapper_1.IsCallbackCalled());
EXPECT_FALSE(
get_system_token_cert_db_callback_wrapper_1.IsDbRetrievalSucceeded());
GetSystemTokenCertDbCallbackWrapper
get_system_token_cert_db_callback_wrapper_2;
system_token_cert_db_initializer()->GetSystemTokenCertDb(
get_system_token_cert_db_callback_wrapper_2.GetCallback());
EXPECT_TRUE(get_system_token_cert_db_callback_wrapper_2.IsCallbackCalled());
EXPECT_FALSE(
get_system_token_cert_db_callback_wrapper_2.IsDbRetrievalSucceeded());
}
} // namespace chromeos
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