| // Copyright 2020 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| #include "tink/subtle/prf/prf_set_util.h" |
| |
| #include <functional> |
| #include <memory> |
| #include <sstream> |
| #include <string> |
| #include <utility> |
| |
| #include "gmock/gmock.h" |
| #include "gtest/gtest.h" |
| #include "absl/memory/memory.h" |
| #include "absl/status/status.h" |
| #include "absl/strings/string_view.h" |
| #include "tink/input_stream.h" |
| #include "tink/subtle/prf/streaming_prf.h" |
| #include "tink/util/istream_input_stream.h" |
| #include "tink/util/status.h" |
| #include "tink/util/test_matchers.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace subtle { |
| namespace { |
| |
| using ::crypto::tink::test::IsOk; |
| using ::testing::_; |
| using ::testing::AnyNumber; |
| using ::testing::DefaultValue; |
| using ::testing::Eq; |
| using ::testing::NiceMock; |
| using ::testing::Not; |
| using ::testing::Return; |
| using ::testing::StrEq; |
| |
| class MockPrf : public Prf { |
| public: |
| MOCK_METHOD(util::StatusOr<std::string>, Compute, |
| (absl::string_view input, size_t output_length), (const)); |
| }; |
| |
| class MockStatefulMac : public StatefulMac { |
| public: |
| MOCK_METHOD(util::Status, Update, (absl::string_view data), (override)); |
| MOCK_METHOD(util::StatusOr<std::string>, Finalize, (), (override)); |
| }; |
| |
| class FakeStatefulMacFactory : public StatefulMacFactory { |
| public: |
| FakeStatefulMacFactory(util::Status update_status, |
| util::StatusOr<std::string> finalize_result) |
| : update_status_(update_status), finalize_result_(finalize_result) {} |
| util::StatusOr<std::unique_ptr<StatefulMac>> Create() const override { |
| auto mac_mock = absl::make_unique<NiceMock<MockStatefulMac>>(); |
| ON_CALL(*mac_mock, Update(_)).WillByDefault(Return(update_status_)); |
| ON_CALL(*mac_mock, Finalize()).WillByDefault(Return(finalize_result_)); |
| std::unique_ptr<StatefulMac> result = std::move(mac_mock); |
| return std::move(result); |
| } |
| |
| private: |
| util::Status update_status_; |
| util::StatusOr<std::string> finalize_result_; |
| }; |
| |
| class MockStreamingPrf : public StreamingPrf { |
| public: |
| MOCK_METHOD(std::unique_ptr<InputStream>, ComputePrf, |
| (absl::string_view input), (const)); |
| }; |
| |
| std::unique_ptr<InputStream> GetInputStreamForString(const std::string& input) { |
| return absl::make_unique<util::IstreamInputStream>( |
| absl::make_unique<std::stringstream>(input)); |
| } |
| |
| class PrfFromStatefulMacFactoryTest : public ::testing::Test { |
| protected: |
| void SetUpWithResult(util::Status update_status, |
| util::StatusOr<std::string> finalize_result) { |
| prf_ = CreatePrfFromStatefulMacFactory( |
| absl::make_unique<FakeStatefulMacFactory>(update_status, |
| finalize_result)); |
| } |
| Prf* prf() { return prf_.get(); } |
| |
| private: |
| std::unique_ptr<Prf> prf_; |
| }; |
| |
| TEST_F(PrfFromStatefulMacFactoryTest, ComputePrf) { |
| SetUpWithResult(util::OkStatus(), std::string("mock_stateful_mac")); |
| auto output_result = prf()->Compute("test_input", 5); |
| ASSERT_TRUE(output_result.ok()) << output_result.status(); |
| EXPECT_THAT(output_result.value(), StrEq("mock_")); |
| } |
| |
| TEST_F(PrfFromStatefulMacFactoryTest, ComputePrfUpdateFails) { |
| SetUpWithResult(util::Status(absl::StatusCode::kInternal, "UpdateFailed"), |
| std::string("mock_stateful_mac")); |
| auto output_result = prf()->Compute("test_input", 5); |
| EXPECT_FALSE(output_result.ok()); |
| EXPECT_THAT(output_result.status().message(), Eq("UpdateFailed")); |
| } |
| |
| TEST_F(PrfFromStatefulMacFactoryTest, ComputePrfFinalizeFails) { |
| SetUpWithResult(util::OkStatus(), |
| util::Status(absl::StatusCode::kInternal, "FinalizeFailed")); |
| auto output_result = prf()->Compute("test_input", 5); |
| EXPECT_FALSE(output_result.ok()); |
| EXPECT_THAT(output_result.status().message(), Eq("FinalizeFailed")); |
| } |
| |
| TEST_F(PrfFromStatefulMacFactoryTest, ComputePrfTooMuchOutputRequested) { |
| SetUpWithResult(util::OkStatus(), std::string("mock_stateful_mac")); |
| auto output_result = prf()->Compute("test_input", 100); |
| EXPECT_FALSE(output_result.ok()); |
| } |
| |
| class PrfFromStreamingPrfTest : public ::testing::Test { |
| protected: |
| void SetUp() override { |
| auto streaming_prf = absl::make_unique<NiceMock<MockStreamingPrf>>(); |
| DefaultValue<std::unique_ptr<InputStream>>::SetFactory( |
| [] { return GetInputStreamForString("output"); }); |
| EXPECT_CALL(*streaming_prf, ComputePrf(Eq("input"))).Times(AnyNumber()); |
| prf_ = CreatePrfFromStreamingPrf(std::move(streaming_prf)); |
| } |
| Prf* prf() { return prf_.get(); } |
| |
| private: |
| std::unique_ptr<Prf> prf_; |
| }; |
| |
| TEST_F(PrfFromStreamingPrfTest, ComputePrfBasic) { |
| auto output_result = prf()->Compute("input", 5); |
| ASSERT_THAT(output_result, IsOk()); |
| EXPECT_THAT(output_result.value(), StrEq("outpu")); |
| } |
| |
| TEST_F(PrfFromStreamingPrfTest, ComputeTwice) { |
| auto output_result = prf()->Compute("input", 5); |
| ASSERT_THAT(output_result, IsOk()); |
| EXPECT_THAT(output_result.value(), StrEq("outpu")); |
| output_result = prf()->Compute("input", 5); |
| ASSERT_THAT(output_result, IsOk()); |
| EXPECT_THAT(output_result.value(), StrEq("outpu")); |
| } |
| |
| TEST_F(PrfFromStreamingPrfTest, ComputeSubstring) { |
| auto output_result = prf()->Compute("input", 5); |
| ASSERT_THAT(output_result, IsOk()); |
| EXPECT_THAT(output_result.value(), StrEq("outpu")); |
| output_result = prf()->Compute("input", 6); |
| ASSERT_THAT(output_result, IsOk()); |
| EXPECT_THAT(output_result.value(), StrEq("output")); |
| output_result = prf()->Compute("input", 2); |
| ASSERT_THAT(output_result, IsOk()); |
| EXPECT_THAT(output_result.value(), StrEq("ou")); |
| } |
| |
| TEST_F(PrfFromStreamingPrfTest, ComputeTooMuch) { |
| auto output_result = prf()->Compute("input", 5); |
| ASSERT_THAT(output_result, IsOk()); |
| EXPECT_THAT(output_result.value(), StrEq("outpu")); |
| output_result = prf()->Compute("input", 100); |
| EXPECT_THAT(output_result, Not(IsOk())) |
| << "Output should not be okay, too much output requested"; |
| } |
| |
| } // namespace |
| } // namespace subtle |
| } // namespace tink |
| } // namespace crypto |