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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "attestation_certificate_generator_impl.h"
#include <iterator>
#include <memory>
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "chrome/browser/ash/attestation/fake_soft_bind_attestation_flow.h"
#include "chrome/browser/ash/login/users/fake_chrome_user_manager.h"
#include "chrome/test/base/testing_browser_process.h"
#include "chrome/test/base/testing_profile_manager.h"
#include "chromeos/ash/services/device_sync/cryptauth_device.h"
#include "chromeos/ash/services/device_sync/cryptauth_enrollment_constants.h"
#include "chromeos/ash/services/device_sync/cryptauth_key.h"
#include "chromeos/ash/services/device_sync/cryptauth_key_registry.h"
#include "chromeos/ash/services/device_sync/cryptauth_key_registry_impl.h"
#include "chromeos/ash/services/device_sync/cryptauth_v2_device_sync_test_devices.h"
#include "chromeos/ash/services/device_sync/fake_ecies_encryption.h"
#include "components/user_manager/scoped_user_manager.h"
#include "content/public/test/browser_task_environment.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ash::phonehub {
using testing::_;
class MockCryptAuthKeyRegistry : public device_sync::CryptAuthKeyRegistry {
public:
MockCryptAuthKeyRegistry()
: key(device_sync::CryptAuthKey(
device_sync::GetLocalDeviceForTest()
.better_together_device_metadata->public_key(),
device_sync::GetPrivateKeyFromPublicKeyForTest(
device_sync::GetLocalDeviceForTest()
.better_together_device_metadata->public_key()),
device_sync::CryptAuthKey::Status::kActive,
cryptauthv2::KeyType::P256,
device_sync::kCryptAuthFixedUserKeyPairHandle)) {}
~MockCryptAuthKeyRegistry() override = default;
const device_sync::CryptAuthKey* GetActiveKey(
device_sync::CryptAuthKeyBundle::Name name) const override {
return &key;
}
void OnKeyRegistryUpdated() override {}
private:
device_sync::CryptAuthKey key;
};
class FakeCryptAuthKeyRegistryFactory
: public device_sync::CryptAuthKeyRegistryImpl::Factory {
public:
FakeCryptAuthKeyRegistryFactory() = default;
~FakeCryptAuthKeyRegistryFactory() override = default;
MockCryptAuthKeyRegistry* instance() { return instance_; }
private:
// CryptAuthKeyRegistryImpl::Factory:
std::unique_ptr<device_sync::CryptAuthKeyRegistry> CreateInstance(
PrefService* pref_service) override {
// Only one instance is expected to be created per test.
EXPECT_FALSE(instance_);
auto instance = std::make_unique<MockCryptAuthKeyRegistry>();
instance_ = instance.get();
return instance;
}
raw_ptr<MockCryptAuthKeyRegistry> instance_ = nullptr;
};
class AttestationCertificateGeneratorImplTest
: public testing::Test,
AttestationCertificateGenerator::Observer {
public:
AttestationCertificateGeneratorImplTest()
: profile_manager_(CreateTestingProfileManager()),
profile_(profile_manager_->CreateTestingProfile("test")) {
device_sync::CryptAuthKeyRegistryImpl::Factory::SetFactoryForTesting(
&mock_cryptauth_key_factory_);
user_manager_ = new FakeChromeUserManager();
user_manager_enabler_ = std::make_unique<user_manager::ScopedUserManager>(
base::WrapUnique(user_manager_.get()));
user_manager_->AddUser(
AccountId::FromUserEmail(profile_->GetProfileUserName()));
}
~AttestationCertificateGeneratorImplTest() override {
if (attestation_certificate_generator_impl_) {
attestation_certificate_generator_impl_->RemoveObserver(this);
}
}
AttestationCertificateGeneratorImplTest(
const AttestationCertificateGeneratorImplTest&) = delete;
AttestationCertificateGeneratorImplTest& operator=(
const AttestationCertificateGeneratorImplTest&) = delete;
void TearDown() override { wait_loop_.reset(); }
// AttestationCertificateGenerator::Observer:
void OnCertificateGenerated(const std::vector<std::string>& certs,
bool valid) override {
is_valid_ = valid;
certs_ = &certs;
if (wait_loop_) {
wait_loop_->Quit();
}
}
protected:
void Initialize(const std::vector<std::string>& certs) {
auto soft_bind_attestation_flow =
std::make_unique<attestation::FakeSoftBindAttestationFlow>();
mock_attestation_flow_ = soft_bind_attestation_flow.get();
mock_attestation_flow_->SetCertificates(certs);
attestation_certificate_generator_impl_ =
std::make_unique<AttestationCertificateGeneratorImpl>(
profile_, std::move(soft_bind_attestation_flow));
attestation_certificate_generator_impl_->AddObserver(this);
}
std::unique_ptr<base::RunLoop> wait_loop_;
const std::vector<std::string> valid_certs_ = {"valid_cert"};
const std::vector<std::string> second_valid_certs_ = {"valid_cert_2"};
const std::vector<std::string> invalid_certs_ = {};
content::BrowserTaskEnvironment task_environment_;
std::unique_ptr<AttestationCertificateGeneratorImpl>
attestation_certificate_generator_impl_;
FakeCryptAuthKeyRegistryFactory mock_cryptauth_key_factory_;
bool is_valid_ = false;
raw_ptr<const std::vector<std::string>> certs_;
std::unique_ptr<TestingProfileManager> profile_manager_;
const raw_ptr<TestingProfile> profile_;
std::unique_ptr<user_manager::ScopedUserManager> user_manager_enabler_;
raw_ptr<FakeChromeUserManager> user_manager_;
raw_ptr<attestation::FakeSoftBindAttestationFlow> mock_attestation_flow_;
private:
std::unique_ptr<TestingProfileManager> CreateTestingProfileManager() {
auto profile_manager = std::make_unique<TestingProfileManager>(
TestingBrowserProcess::GetGlobal());
EXPECT_TRUE(profile_manager->SetUp());
return profile_manager;
}
};
TEST_F(AttestationCertificateGeneratorImplTest,
RetrieveCertificateWithoutCache) {
Initialize(valid_certs_);
wait_loop_ = std::make_unique<base::RunLoop>();
mock_attestation_flow_->SetCertificates(second_valid_certs_);
// Reset the timestamp to force regenerate certificate.
attestation_certificate_generator_impl_->last_attestation_completed_time_ =
base::Time();
attestation_certificate_generator_impl_->RetrieveCertificate();
wait_loop_->Run();
EXPECT_TRUE(is_valid_);
EXPECT_EQ(*certs_, second_valid_certs_);
}
TEST_F(AttestationCertificateGeneratorImplTest, RetrieveCertificateWithCache) {
Initialize(valid_certs_);
mock_attestation_flow_->SetCertificates(second_valid_certs_);
wait_loop_ = std::make_unique<base::RunLoop>();
attestation_certificate_generator_impl_->RetrieveCertificate();
wait_loop_->Run();
// Used cached result generated in constructor.
EXPECT_TRUE(is_valid_);
EXPECT_EQ(*certs_, valid_certs_);
}
TEST_F(AttestationCertificateGeneratorImplTest, RetryInvalidCerts) {
Initialize(invalid_certs_);
mock_attestation_flow_->SetCertificates(second_valid_certs_);
wait_loop_ = std::make_unique<base::RunLoop>();
attestation_certificate_generator_impl_->RetrieveCertificate();
wait_loop_->Run();
EXPECT_TRUE(is_valid_);
EXPECT_EQ(*certs_, second_valid_certs_);
}
TEST_F(AttestationCertificateGeneratorImplTest, RegenerateAfterExpiration) {
Initialize(invalid_certs_);
mock_attestation_flow_->SetCertificates(second_valid_certs_);
attestation_certificate_generator_impl_->last_attestation_completed_time_ =
base::Time::NowFromSystemTime() - base::Hours(25);
wait_loop_ = std::make_unique<base::RunLoop>();
attestation_certificate_generator_impl_->RetrieveCertificate();
wait_loop_->Run();
EXPECT_TRUE(is_valid_);
EXPECT_EQ(*certs_, second_valid_certs_);
}
} // namespace ash::phonehub
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