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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 "components/unexportable_keys/unexportable_key_task_manager.h"
#include <variant>
#include "base/memory/scoped_refptr.h"
#include "base/test/gmock_expected_support.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/task_environment.h"
#include "base/test/test_future.h"
#include "base/token.h"
#include "base/types/expected.h"
#include "components/unexportable_keys/background_task_priority.h"
#include "components/unexportable_keys/mock_unexportable_key.h"
#include "components/unexportable_keys/ref_counted_unexportable_signing_key.h"
#include "components/unexportable_keys/service_error.h"
#include "components/unexportable_keys/unexportable_key_id.h"
#include "crypto/scoped_fake_unexportable_key_provider.h"
#include "crypto/signature_verifier.h"
#include "crypto/unexportable_key.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace unexportable_keys {
using testing::ElementsAreArray;
using testing::Return;
namespace {
// Result histograms:
constexpr std::string_view kGenerateKeyTaskResultHistogramName =
"Crypto.UnexportableKeys.BackgroundTaskResult.GenerateKey";
constexpr std::string_view kFromWrappedKeyTaskResultHistogramName =
"Crypto.UnexportableKeys.BackgroundTaskResult.FromWrappedKey";
constexpr std::string_view kSignTaskResultHistogramName =
"Crypto.UnexportableKeys.BackgroundTaskResult.Sign";
// Retries histograms:
constexpr std::string_view kGenerateKeyTaskRetriesSuccessHistogramName =
"Crypto.UnexportableKeys.BackgroundTaskRetries.GenerateKey.Success";
constexpr std::string_view kFromWrappedKeyTaskRetriesSuccessHistogramName =
"Crypto.UnexportableKeys.BackgroundTaskRetries.FromWrappedKey.Success";
constexpr std::string_view kSignTaskRetriesSuccessHistogramName =
"Crypto.UnexportableKeys.BackgroundTaskRetries.Sign.Success";
constexpr std::string_view kGenerateKeyTaskRetriesFailureHistogramName =
"Crypto.UnexportableKeys.BackgroundTaskRetries.GenerateKey.Failure";
constexpr std::string_view kFromWrappedKeyTaskRetriesFailureHistogramName =
"Crypto.UnexportableKeys.BackgroundTaskRetries.FromWrappedKey.Failure";
constexpr std::string_view kSignTaskRetriesFailureHistogramName =
"Crypto.UnexportableKeys.BackgroundTaskRetries.Sign.Failure";
} // namespace
class UnexportableKeyTaskManagerTest : public testing::Test {
public:
UnexportableKeyTaskManagerTest() = default;
~UnexportableKeyTaskManagerTest() override = default;
void RunBackgroundTasks() { task_environment_.RunUntilIdle(); }
UnexportableKeyTaskManager& task_manager() { return task_manager_; }
void DisableKeyProvider() {
// Using `emplace()` to destroy the existing scoped object before
// constructing a new one.
scoped_key_provider_.emplace<crypto::ScopedNullUnexportableKeyProvider>();
}
private:
base::test::TaskEnvironment task_environment_{
base::test::TaskEnvironment::ThreadPoolExecutionMode::
QUEUED}; // QUEUED - tasks don't run until `RunUntilIdle()` is
// called.
// Provides a fake key provider by default.
std::variant<crypto::ScopedFakeUnexportableKeyProvider,
crypto::ScopedNullUnexportableKeyProvider>
scoped_key_provider_;
UnexportableKeyTaskManager task_manager_{
crypto::UnexportableKeyProvider::Config()};
};
TEST_F(UnexportableKeyTaskManagerTest, GenerateKeyAsync) {
base::HistogramTester histogram_tester;
base::test::TestFuture<
ServiceErrorOr<scoped_refptr<RefCountedUnexportableSigningKey>>>
future;
auto supported_algorithm = {crypto::SignatureVerifier::ECDSA_SHA256};
task_manager().GenerateSigningKeySlowlyAsync(
supported_algorithm, BackgroundTaskPriority::kBestEffort,
future.GetCallback());
EXPECT_FALSE(future.IsReady());
RunBackgroundTasks();
EXPECT_TRUE(future.IsReady());
EXPECT_THAT(future.Get(), base::test::ValueIs(::testing::NotNull()));
EXPECT_THAT(
histogram_tester.GetAllSamples(kGenerateKeyTaskResultHistogramName),
testing::ElementsAre(base::Bucket(kNoServiceErrorForMetrics, 1)));
EXPECT_THAT(histogram_tester.GetAllSamples(
kGenerateKeyTaskRetriesSuccessHistogramName),
testing::ElementsAre(base::Bucket(0, 1)));
}
TEST_F(UnexportableKeyTaskManagerTest,
GenerateKeyAsyncFailureUnsupportedAlgorithm) {
base::HistogramTester histogram_tester;
base::test::TestFuture<
ServiceErrorOr<scoped_refptr<RefCountedUnexportableSigningKey>>>
future;
// RSA_PKCS1_SHA1 is not supported by the protocol, so the key generation
// should fail.
auto unsupported_algorithm = {crypto::SignatureVerifier::RSA_PKCS1_SHA1};
task_manager().GenerateSigningKeySlowlyAsync(
unsupported_algorithm, BackgroundTaskPriority::kBestEffort,
future.GetCallback());
RunBackgroundTasks();
EXPECT_EQ(future.Get(),
base::unexpected(ServiceError::kAlgorithmNotSupported));
EXPECT_THAT(
histogram_tester.GetAllSamples(kGenerateKeyTaskResultHistogramName),
testing::ElementsAre(
base::Bucket(ServiceError::kAlgorithmNotSupported, 1)));
EXPECT_THAT(histogram_tester.GetAllSamples(
kGenerateKeyTaskRetriesFailureHistogramName),
testing::ElementsAre(base::Bucket(0, 1)));
}
TEST_F(UnexportableKeyTaskManagerTest, GenerateKeyAsyncFailureNoKeyProvider) {
base::HistogramTester histogram_tester;
base::test::TestFuture<
ServiceErrorOr<scoped_refptr<RefCountedUnexportableSigningKey>>>
future;
auto supported_algorithm = {crypto::SignatureVerifier::ECDSA_SHA256};
DisableKeyProvider();
task_manager().GenerateSigningKeySlowlyAsync(
supported_algorithm, BackgroundTaskPriority::kBestEffort,
future.GetCallback());
RunBackgroundTasks();
EXPECT_EQ(future.Get(), base::unexpected(ServiceError::kNoKeyProvider));
EXPECT_THAT(
histogram_tester.GetAllSamples(kGenerateKeyTaskResultHistogramName),
testing::ElementsAre(base::Bucket(ServiceError::kNoKeyProvider, 1)));
EXPECT_THAT(histogram_tester.GetAllSamples(
kGenerateKeyTaskRetriesFailureHistogramName),
testing::ElementsAre(base::Bucket(0, 1)));
}
TEST_F(UnexportableKeyTaskManagerTest, FromWrappedKeyAsync) {
// First, generate a new signing key.
base::test::TestFuture<
ServiceErrorOr<scoped_refptr<RefCountedUnexportableSigningKey>>>
generate_key_future;
auto supported_algorithm = {crypto::SignatureVerifier::ECDSA_SHA256};
task_manager().GenerateSigningKeySlowlyAsync(
supported_algorithm, BackgroundTaskPriority::kBestEffort,
generate_key_future.GetCallback());
RunBackgroundTasks();
ASSERT_OK_AND_ASSIGN(scoped_refptr<RefCountedUnexportableSigningKey> key,
generate_key_future.Get());
std::vector<uint8_t> wrapped_key = key->key().GetWrappedKey();
// Second, unwrap the newly generated key.
base::HistogramTester histogram_tester;
base::test::TestFuture<
ServiceErrorOr<scoped_refptr<RefCountedUnexportableSigningKey>>>
unwrap_key_future;
task_manager().FromWrappedSigningKeySlowlyAsync(
wrapped_key, BackgroundTaskPriority::kBestEffort,
unwrap_key_future.GetCallback());
EXPECT_FALSE(unwrap_key_future.IsReady());
RunBackgroundTasks();
EXPECT_TRUE(unwrap_key_future.IsReady());
ASSERT_OK_AND_ASSIGN(auto unwrapped_key, unwrap_key_future.Get());
EXPECT_NE(unwrapped_key, nullptr);
// New key should have a unique ID.
EXPECT_NE(unwrapped_key->id(), key->id());
// Public key should be the same for both keys.
EXPECT_EQ(key->key().GetSubjectPublicKeyInfo(),
unwrapped_key->key().GetSubjectPublicKeyInfo());
EXPECT_THAT(
histogram_tester.GetAllSamples(kFromWrappedKeyTaskResultHistogramName),
testing::ElementsAre(base::Bucket(kNoServiceErrorForMetrics, 1)));
EXPECT_THAT(histogram_tester.GetAllSamples(
kFromWrappedKeyTaskRetriesSuccessHistogramName),
testing::ElementsAre(base::Bucket(0, 1)));
}
TEST_F(UnexportableKeyTaskManagerTest, FromWrappedKeyAsyncFailureEmptyKey) {
base::HistogramTester histogram_tester;
base::test::TestFuture<
ServiceErrorOr<scoped_refptr<RefCountedUnexportableSigningKey>>>
future;
std::vector<uint8_t> empty_wrapped_key;
task_manager().FromWrappedSigningKeySlowlyAsync(
empty_wrapped_key, BackgroundTaskPriority::kBestEffort,
future.GetCallback());
RunBackgroundTasks();
EXPECT_EQ(future.Get(), base::unexpected(ServiceError::kCryptoApiFailed));
EXPECT_THAT(
histogram_tester.GetAllSamples(kFromWrappedKeyTaskResultHistogramName),
testing::ElementsAre(base::Bucket(ServiceError::kCryptoApiFailed, 1)));
EXPECT_THAT(histogram_tester.GetAllSamples(
kFromWrappedKeyTaskRetriesFailureHistogramName),
testing::ElementsAre(base::Bucket(0, 1)));
}
TEST_F(UnexportableKeyTaskManagerTest,
FromWrappedKeyAsyncFailureNoKeyProvider) {
// First, obtain a valid wrapped key.
base::test::TestFuture<
ServiceErrorOr<scoped_refptr<RefCountedUnexportableSigningKey>>>
generate_key_future;
auto supported_algorithm = {crypto::SignatureVerifier::ECDSA_SHA256};
task_manager().GenerateSigningKeySlowlyAsync(
supported_algorithm, BackgroundTaskPriority::kBestEffort,
generate_key_future.GetCallback());
RunBackgroundTasks();
ASSERT_OK_AND_ASSIGN(scoped_refptr<RefCountedUnexportableSigningKey> key,
generate_key_future.Get());
std::vector<uint8_t> wrapped_key = key->key().GetWrappedKey();
// Second, emulate the key provider being not available and check that
// `FromWrappedSigningKeySlowlyAsync()` returns a corresponding error.
base::HistogramTester histogram_tester;
base::test::TestFuture<
ServiceErrorOr<scoped_refptr<RefCountedUnexportableSigningKey>>>
future;
DisableKeyProvider();
task_manager().FromWrappedSigningKeySlowlyAsync(
wrapped_key, BackgroundTaskPriority::kBestEffort, future.GetCallback());
RunBackgroundTasks();
EXPECT_EQ(future.Get(), base::unexpected(ServiceError::kNoKeyProvider));
EXPECT_THAT(
histogram_tester.GetAllSamples(kFromWrappedKeyTaskResultHistogramName),
testing::ElementsAre(base::Bucket(ServiceError::kNoKeyProvider, 1)));
EXPECT_THAT(histogram_tester.GetAllSamples(
kFromWrappedKeyTaskRetriesFailureHistogramName),
testing::ElementsAre(base::Bucket(0, 1)));
}
TEST_F(UnexportableKeyTaskManagerTest, SignAsync) {
// First, generate a new signing key.
base::test::TestFuture<
ServiceErrorOr<scoped_refptr<RefCountedUnexportableSigningKey>>>
generate_key_future;
auto supported_algorithm = {crypto::SignatureVerifier::ECDSA_SHA256};
task_manager().GenerateSigningKeySlowlyAsync(
supported_algorithm, BackgroundTaskPriority::kBestEffort,
generate_key_future.GetCallback());
RunBackgroundTasks();
ASSERT_OK_AND_ASSIGN(auto key, generate_key_future.Get());
// Second, sign some data with the key.
base::HistogramTester histogram_tester;
base::test::TestFuture<ServiceErrorOr<std::vector<uint8_t>>> sign_future;
std::vector<uint8_t> data = {4, 8, 15, 16, 23, 42};
task_manager().SignSlowlyAsync(key, data, BackgroundTaskPriority::kBestEffort,
/*max_retries=*/0, sign_future.GetCallback());
EXPECT_FALSE(sign_future.IsReady());
RunBackgroundTasks();
EXPECT_TRUE(sign_future.IsReady());
ASSERT_OK_AND_ASSIGN(const auto signed_data, sign_future.Get());
EXPECT_THAT(histogram_tester.GetAllSamples(kSignTaskResultHistogramName),
testing::ElementsAre(base::Bucket(kNoServiceErrorForMetrics, 1)));
EXPECT_THAT(
histogram_tester.GetAllSamples(kSignTaskRetriesSuccessHistogramName),
testing::ElementsAre(base::Bucket(0, 1)));
// Also verify that the signature was generated correctly.
crypto::SignatureVerifier verifier;
ASSERT_TRUE(verifier.VerifyInit(key->key().Algorithm(), signed_data,
key->key().GetSubjectPublicKeyInfo()));
verifier.VerifyUpdate(data);
EXPECT_TRUE(verifier.VerifyFinal());
}
TEST_F(UnexportableKeyTaskManagerTest, SignAsyncNullKey) {
base::HistogramTester histogram_tester;
base::test::TestFuture<ServiceErrorOr<std::vector<uint8_t>>> sign_future;
std::vector<uint8_t> data = {4, 8, 15, 16, 23, 42};
task_manager().SignSlowlyAsync(nullptr, data,
BackgroundTaskPriority::kBestEffort,
/*max_retries=*/0, sign_future.GetCallback());
RunBackgroundTasks();
EXPECT_EQ(sign_future.Get(), base::unexpected(ServiceError::kKeyNotFound));
EXPECT_THAT(
histogram_tester.GetAllSamples(kSignTaskResultHistogramName),
testing::ElementsAre(base::Bucket(ServiceError::kKeyNotFound, 1)));
EXPECT_THAT(
histogram_tester.GetAllSamples(kSignTaskRetriesFailureHistogramName),
testing::ElementsAre(base::Bucket(0, 1)));
}
TEST_F(UnexportableKeyTaskManagerTest, RetrySignAsyncWithSuccess) {
auto key = std::make_unique<MockUnexportableKey>();
std::vector<uint8_t> data = {4, 8, 15, 16, 23, 42};
EXPECT_CALL(*key, SignSlowly(ElementsAreArray(data)))
.WillOnce(Return(std::nullopt))
.WillOnce(Return(std::nullopt))
.WillOnce(Return(std::vector<uint8_t>{1, 2, 3}));
auto ref_counted_key = base::MakeRefCounted<RefCountedUnexportableSigningKey>(
std::move(key), UnexportableKeyId());
base::HistogramTester histogram_tester;
base::test::TestFuture<ServiceErrorOr<std::vector<uint8_t>>> sign_future;
task_manager().SignSlowlyAsync(ref_counted_key, data,
BackgroundTaskPriority::kBestEffort,
/*max_retries=*/2, sign_future.GetCallback());
RunBackgroundTasks();
EXPECT_THAT(sign_future.Get(), base::test::HasValue());
EXPECT_THAT(histogram_tester.GetAllSamples(kSignTaskResultHistogramName),
testing::ElementsAre(base::Bucket(kNoServiceErrorForMetrics, 1)));
EXPECT_THAT(
histogram_tester.GetAllSamples(kSignTaskRetriesSuccessHistogramName),
testing::ElementsAre(base::Bucket(2, 1)));
}
TEST_F(UnexportableKeyTaskManagerTest, RetrySignAsyncWithFailure) {
auto key = std::make_unique<MockUnexportableKey>();
std::vector<uint8_t> data = {0, 1, 1, 2, 3, 5, 8};
EXPECT_CALL(*key, SignSlowly(ElementsAreArray(data)))
.Times(3)
.WillRepeatedly(Return(std::nullopt));
auto ref_counted_key = base::MakeRefCounted<RefCountedUnexportableSigningKey>(
std::move(key), UnexportableKeyId());
base::HistogramTester histogram_tester;
base::test::TestFuture<ServiceErrorOr<std::vector<uint8_t>>> sign_future;
task_manager().SignSlowlyAsync(ref_counted_key, data,
BackgroundTaskPriority::kBestEffort,
/*max_retries=*/2, sign_future.GetCallback());
RunBackgroundTasks();
EXPECT_EQ(sign_future.Get(),
base::unexpected(ServiceError::kCryptoApiFailed));
EXPECT_THAT(
histogram_tester.GetAllSamples(kSignTaskResultHistogramName),
testing::ElementsAre(base::Bucket(ServiceError::kCryptoApiFailed, 1)));
EXPECT_THAT(
histogram_tester.GetAllSamples(kSignTaskRetriesFailureHistogramName),
testing::ElementsAre(base::Bucket(2, 1)));
}
} // namespace unexportable_keys
|
