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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <cstdint>
#include <vector>
#include "base/containers/span.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "chrome/updater/certificate_tag.h"
#include "chrome/updater/util/unit_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "third_party/zlib/google/compression_utils.h"
namespace updater::tagging {
TEST(CertificateTag, RoundTrip) {
std::string exe;
ASSERT_TRUE(base::ReadFileToString(
updater::test::GetTestFilePath("signed.exe.gz"), &exe));
ASSERT_TRUE(compression::GzipUncompress(exe, &exe));
const base::span<const uint8_t> exe_span(
reinterpret_cast<const uint8_t*>(exe.data()), exe.size());
absl::optional<Binary> bin(Binary::Parse(exe_span));
ASSERT_TRUE(bin);
// Binary should be untagged on disk.
absl::optional<base::span<const uint8_t>> orig_tag(bin->tag());
EXPECT_FALSE(orig_tag);
constexpr uint8_t kTag[] = {1, 2, 3, 4, 5};
absl::optional<std::vector<uint8_t>> updated_exe(bin->SetTag(kTag));
ASSERT_TRUE(updated_exe);
absl::optional<Binary> bin2(Binary::Parse(*updated_exe));
ASSERT_TRUE(bin2);
absl::optional<base::span<const uint8_t>> parsed_tag(bin2->tag());
ASSERT_TRUE(parsed_tag);
EXPECT_TRUE(parsed_tag->size() == sizeof(kTag) &&
memcmp(kTag, parsed_tag->data(), sizeof(kTag)) == 0);
// Update an existing tag.
constexpr uint8_t kTag2[] = {1, 2, 3, 4, 6};
absl::optional<std::vector<uint8_t>> updated_again_exe(bin2->SetTag(kTag2));
ASSERT_TRUE(updated_again_exe);
absl::optional<Binary> bin3(Binary::Parse(*updated_again_exe));
ASSERT_TRUE(bin3);
absl::optional<base::span<const uint8_t>> parsed_tag2(bin3->tag());
ASSERT_TRUE(parsed_tag2);
EXPECT_TRUE(parsed_tag2->size() == sizeof(kTag2) &&
memcmp(kTag2, parsed_tag2->data(), sizeof(kTag2)) == 0);
// Updating an existing tag with a tag of the same size should not have grown
// the binary, i.e. the old tag should have been erased first.
EXPECT_EQ(sizeof(kTag), sizeof(kTag2));
EXPECT_EQ(updated_exe->size(), updated_again_exe->size());
}
} // namespace updater::tagging
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