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// Copyright 2024 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/attribution_reporting/fuzz_utils.h"
#include <stddef.h>
#include <stdint.h>
#include <optional>
#include <string>
#include <utility>
#include "base/check.h"
#include "base/strings/string_util.h"
#include "base/time/time.h"
#include "base/types/expected.h"
#include "base/values.h"
#include "components/attribution_reporting/constants.h"
#include "components/attribution_reporting/filters.h"
#include "components/attribution_reporting/max_event_level_reports.h"
#include "components/attribution_reporting/source_type.mojom-shared.h"
#include "third_party/fuzztest/src/fuzztest/fuzztest.h"
namespace attribution_reporting {
namespace {
fuzztest::Domain<std::string> AnyFilterString(std::optional<size_t> max_size) {
auto string = fuzztest::Arbitrary<std::string>();
if (max_size.has_value()) {
string.WithMaxSize(*max_size);
}
return fuzztest::Filter(
[](const std::string& s) {
return base::IsStringUTF8AllowingNoncharacters(s);
},
std::move(string));
}
template <typename KeyPred>
fuzztest::Domain<FilterValues> AnyFilterValues(
const fuzztest::Domain<std::string>& string,
KeyPred&& key_pred,
std::optional<size_t> max_values_per_key,
std::optional<size_t> max_keys) {
auto values_per_key = fuzztest::UniqueElementsVectorOf(string);
if (max_values_per_key.has_value()) {
values_per_key.WithMaxSize(*max_values_per_key);
}
auto key_values = fuzztest::ContainerOf<FilterValues>(
fuzztest::PairOf(fuzztest::Filter(std::move(key_pred), string),
std::move(values_per_key)));
if (max_keys.has_value()) {
key_values.WithMaxSize(*max_keys);
}
return key_values;
}
fuzztest::Domain<base::TimeDelta> AnyLookbackWindow() {
return fuzztest::Map(
[](int64_t micros) { return base::Microseconds(micros); },
fuzztest::Positive<int64_t>());
}
} // namespace
fuzztest::Domain<mojom::SourceType> AnySourceType() {
return fuzztest::ElementOf<mojom::SourceType>({
mojom::SourceType::kNavigation,
mojom::SourceType::kEvent,
});
}
fuzztest::Domain<MaxEventLevelReports> AnyMaxEventLevelReports() {
return fuzztest::ConstructorOf<MaxEventLevelReports>(
fuzztest::InRange(0, static_cast<int>(MaxEventLevelReports::Max())));
}
fuzztest::Domain<FilterData> AnyFilterData() {
return fuzztest::Map(
[](const FilterValues& filter_values) {
auto result = FilterData::CreateForTesting(filter_values);
CHECK(result.has_value()) << static_cast<int>(result.error()) << ": "
<< FilterValuesToJson(filter_values);
return *std::move(result);
},
AnyFilterValues(
AnyFilterString(kMaxBytesPerFilterString),
[](const std::string& key) {
return key != FilterData::kSourceTypeFilterKey;
},
kMaxValuesPerFilter, kMaxFiltersPerSource));
}
fuzztest::Domain<FilterConfig> AnyFilterConfig() {
return fuzztest::Map(
[](FilterValues&& filter_values,
std::optional<base::TimeDelta> lookback_window) {
return *FilterConfig::Create(std::move(filter_values), lookback_window);
},
AnyFilterValues(
AnyFilterString(/*max_size=*/std::nullopt),
[](const std::string& key) {
return !base::StartsWith(key, FilterConfig::kReservedKeyPrefix);
},
/*max_values_per_key=*/std::nullopt,
/*max_keys=*/std::nullopt),
fuzztest::OptionalOf(AnyLookbackWindow()));
}
fuzztest::Domain<FiltersDisjunction> AnyFiltersDisjunction() {
return fuzztest::VectorOf(AnyFilterConfig());
}
fuzztest::Domain<FilterPair> AnyFilterPair() {
return fuzztest::ConstructorOf<FilterPair>(
/*positive=*/AnyFiltersDisjunction(),
/*negative=*/AnyFiltersDisjunction());
}
} // namespace attribution_reporting
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