| // Copyright 2023 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/internal/test_random_access_stream.h" |
| |
| #include <memory> |
| #include <string> |
| #include <utility> |
| |
| #include "gmock/gmock.h" |
| #include "gtest/gtest.h" |
| #include "absl/status/status.h" |
| #include "tink/subtle/random.h" |
| #include "tink/util/buffer.h" |
| #include "tink/util/status.h" |
| #include "tink/util/test_matchers.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace internal { |
| namespace { |
| |
| using ::crypto::tink::test::StatusIs; |
| |
| TEST(TestRandomAccessStreamTest, ReadAllSucceeds) { |
| const int buffer_size = 4 * 1024; |
| const int stream_size = 100 * 1024; |
| std::string stream_content = subtle::Random::GetRandomBytes(stream_size); |
| auto rand_access_stream = |
| std::make_unique<TestRandomAccessStream>(stream_content); |
| auto buffer = *std::move(util::Buffer::New(buffer_size)); |
| util::Status pread_status = util::OkStatus(); |
| std::string result; |
| do { |
| pread_status = |
| rand_access_stream->PRead(result.size(), buffer_size, buffer.get()); |
| result.append(buffer->get_mem_block(), buffer->size()); |
| } while (pread_status.ok()); |
| EXPECT_THAT(pread_status, StatusIs(absl::StatusCode::kOutOfRange)); |
| EXPECT_EQ(result, stream_content); |
| } |
| |
| TEST(TestRandomAccessStreamTest, PreadAllInOnePread) { |
| const int stream_size = 8 * 1024; |
| std::string stream_content = subtle::Random::GetRandomBytes(stream_size); |
| auto rand_access_stream = |
| std::make_unique<TestRandomAccessStream>(stream_content); |
| auto buffer = *std::move(util::Buffer::New(stream_size)); |
| ASSERT_THAT( |
| rand_access_stream->PRead(/*position=*/0, stream_size, buffer.get()), |
| StatusIs(absl::StatusCode::kOutOfRange)); |
| EXPECT_EQ(std::string(buffer->get_mem_block(), buffer->size()), |
| stream_content); |
| } |
| |
| TEST(TestRandomAccessStreamTest, PreadCountLargerThanBufferFails) { |
| const int buffer_size = 4 * 1024; |
| const int stream_size = 100 * 1024; |
| std::string stream_content = subtle::Random::GetRandomBytes(stream_size); |
| auto rand_access_stream = |
| std::make_unique<TestRandomAccessStream>(stream_content); |
| auto buffer = *std::move(util::Buffer::New(buffer_size)); |
| EXPECT_THAT( |
| rand_access_stream->PRead(/*position=*/0, buffer_size + 1, buffer.get()), |
| StatusIs(absl::StatusCode::kInvalidArgument)); |
| } |
| |
| TEST(TestRandomAccessStreamTest, InvalidPosition) { |
| const int buffer_size = 4 * 1024; |
| const int stream_size = 100 * 1024; |
| std::string stream_content = subtle::Random::GetRandomBytes(stream_size); |
| auto rand_access_stream = |
| std::make_unique<TestRandomAccessStream>(stream_content); |
| auto buffer = *std::move(util::Buffer::New(buffer_size)); |
| EXPECT_THAT(rand_access_stream->PRead(-1, buffer_size, buffer.get()), |
| StatusIs(absl::StatusCode::kInvalidArgument)); |
| } |
| |
| TEST(TestRandomAccessStreamTest, PreadWithNullBufferFails) { |
| const int stream_size = 100 * 1024; |
| std::string stream_content = subtle::Random::GetRandomBytes(stream_size); |
| auto rand_access_stream = |
| std::make_unique<TestRandomAccessStream>(stream_content); |
| EXPECT_THAT(rand_access_stream->PRead(/*position=*/0, stream_size, |
| /*dest_buffer=*/nullptr), |
| StatusIs(absl::StatusCode::kInvalidArgument)); |
| } |
| |
| TEST(TestRandomAccessStreamTest, PreadWithEmptyStreamEof) { |
| const int buffer_size = 4 * 1024; |
| std::string stream_content; // Empty string. |
| auto rand_access_stream = |
| std::make_unique<TestRandomAccessStream>(stream_content); |
| auto buffer = *std::move(util::Buffer::New(buffer_size)); |
| EXPECT_THAT( |
| rand_access_stream->PRead(/*position=*/0, buffer_size, buffer.get()), |
| StatusIs(absl::StatusCode::kOutOfRange)); |
| } |
| |
| // Pread of the last partial block populates the buffer with the remaining |
| // bytes and returns an EOF status. |
| TEST(TestRandomAccessStreamTest, PreadTheLastPartialBlockReturnsEof) { |
| const int buffer_size = 4 * 1024; |
| const int stream_size = 100 * 1024; |
| std::string stream_content = subtle::Random::GetRandomBytes(stream_size); |
| auto rand_access_stream = |
| std::make_unique<TestRandomAccessStream>(stream_content); |
| auto buffer = *std::move(util::Buffer::New(buffer_size)); |
| // Read at a postion so that only buffer_size - 1 bytes are left. |
| EXPECT_THAT(rand_access_stream->PRead(stream_size - buffer_size + 1, |
| buffer_size, buffer.get()), |
| StatusIs(absl::StatusCode::kOutOfRange)); |
| EXPECT_EQ(buffer->size(), buffer_size - 1); |
| EXPECT_EQ(std::string(buffer->get_mem_block(), buffer->size()), |
| stream_content.substr(stream_size - buffer_size + 1)); |
| } |
| |
| TEST(TestRandomAccessStreamTest, ReadAllFromRandomAccessStreamSucceeds) { |
| std::string content_to_read = subtle::Random::GetRandomBytes(4 * 1024); |
| auto test_random_access_stream = |
| std::make_unique<TestRandomAccessStream>(content_to_read); |
| std::string read_content; |
| EXPECT_THAT(ReadAllFromRandomAccessStream(test_random_access_stream.get(), |
| read_content, |
| /*chunk_size=*/128), |
| StatusIs(absl::StatusCode::kOutOfRange)); |
| EXPECT_EQ(content_to_read, read_content); |
| } |
| |
| TEST(TestRandomAccessStreamTest, |
| ReadAllFromRandomAccessStreamFailsWhenChunkIsLessThanOne) { |
| std::string content_to_read = subtle::Random::GetRandomBytes(4 * 1024); |
| auto test_random_access_stream = |
| std::make_unique<TestRandomAccessStream>(content_to_read); |
| std::string read_content; |
| EXPECT_THAT(ReadAllFromRandomAccessStream(test_random_access_stream.get(), |
| read_content, |
| /*chunk_size=*/0), |
| StatusIs(absl::StatusCode::kInvalidArgument)); |
| EXPECT_THAT(ReadAllFromRandomAccessStream(test_random_access_stream.get(), |
| read_content, |
| /*chunk_size=*/-10), |
| StatusIs(absl::StatusCode::kInvalidArgument)); |
| } |
| |
| } // namespace |
| } // namespace internal |
| } // namespace tink |
| } // namespace crypto |