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header_map_impl_fuzz_test.cc
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header_map_impl_fuzz_test.cc
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#include <functional>
#include "source/common/common/assert.h"
#include "source/common/common/logger.h"
#include "source/common/http/header_map_impl.h"
#include "test/common/http/header_map_impl_fuzz.pb.h"
#include "test/fuzz/fuzz_runner.h"
#include "test/fuzz/utility.h"
#include "test/test_common/test_runtime.h"
#include "absl/strings/ascii.h"
using Envoy::Fuzz::replaceInvalidCharacters;
namespace Envoy {
// Fuzz the header map implementation.
DEFINE_PROTO_FUZZER(const test::common::http::HeaderMapImplFuzzTestCase& input) {
TestScopedRuntime scoped_runtime;
auto header_map = Http::RequestHeaderMapImpl::create();
std::vector<std::unique_ptr<Http::LowerCaseString>> lower_case_strings;
std::vector<std::unique_ptr<std::string>> strings;
uint64_t set_integer;
constexpr auto max_actions = 128;
for (int i = 0; i < std::min(max_actions, input.actions().size()); ++i) {
const auto& action = input.actions(i);
ENVOY_LOG_MISC(debug, "Action {}", action.DebugString());
switch (action.action_selector_case()) {
case test::common::http::Action::kAddReference: {
const auto& add_reference = action.add_reference();
lower_case_strings.emplace_back(
std::make_unique<Http::LowerCaseString>(replaceInvalidCharacters(add_reference.key())));
strings.emplace_back(
std::make_unique<std::string>(replaceInvalidCharacters(add_reference.value())));
header_map->addReference(*lower_case_strings.back(), *strings.back());
break;
}
case test::common::http::Action::kAddReferenceKey: {
const auto& add_reference_key = action.add_reference_key();
lower_case_strings.emplace_back(std::make_unique<Http::LowerCaseString>(
replaceInvalidCharacters(add_reference_key.key())));
switch (add_reference_key.value_selector_case()) {
case test::common::http::AddReferenceKey::kStringValue:
header_map->addReferenceKey(*lower_case_strings.back(),
replaceInvalidCharacters(add_reference_key.string_value()));
break;
case test::common::http::AddReferenceKey::kUint64Value:
header_map->addReferenceKey(*lower_case_strings.back(), add_reference_key.uint64_value());
break;
default:
break;
}
break;
}
case test::common::http::Action::kAddCopy: {
const auto& add_copy = action.add_copy();
const Http::LowerCaseString key{replaceInvalidCharacters(add_copy.key())};
switch (add_copy.value_selector_case()) {
case test::common::http::AddCopy::kStringValue:
header_map->addCopy(key, replaceInvalidCharacters(add_copy.string_value()));
break;
case test::common::http::AddCopy::kUint64Value:
header_map->addCopy(key, add_copy.uint64_value());
break;
default:
break;
}
break;
}
case test::common::http::Action::kSetReference: {
const auto& set_reference = action.set_reference();
lower_case_strings.emplace_back(
std::make_unique<Http::LowerCaseString>(replaceInvalidCharacters(set_reference.key())));
strings.emplace_back(
std::make_unique<std::string>(replaceInvalidCharacters(set_reference.value())));
header_map->setReference(*lower_case_strings.back(), *strings.back());
break;
}
case test::common::http::Action::kSetReferenceKey: {
const auto& set_reference_key = action.set_reference_key();
lower_case_strings.emplace_back(std::make_unique<Http::LowerCaseString>(
replaceInvalidCharacters(set_reference_key.key())));
header_map->setReferenceKey(*lower_case_strings.back(),
replaceInvalidCharacters(set_reference_key.value()));
break;
}
case test::common::http::Action::kGet: {
const auto& get = action.get();
const auto header_entry =
header_map->get(Http::LowerCaseString(replaceInvalidCharacters(get.key())));
for (size_t i = 0; i < header_entry.size(); i++) {
// Do some read-only stuff.
(void)strlen(std::string(header_entry[i]->key().getStringView()).c_str());
(void)strlen(std::string(header_entry[i]->value().getStringView()).c_str());
header_entry[i]->key().empty();
header_entry[i]->value().empty();
}
break;
}
case test::common::http::Action::kMutateAndMove: {
const auto& mutate_and_move = action.mutate_and_move();
lower_case_strings.emplace_back(
std::make_unique<Http::LowerCaseString>(replaceInvalidCharacters(mutate_and_move.key())));
// Randomly (using fuzzer data) set the header_field to either be of type Reference or Inline
const auto& str = lower_case_strings.back();
Http::HeaderString header_field; // By default it's Inline
if ((!str->get().empty()) && (str->get().at(0) & 0x1)) {
// Keeping header_field as Inline
header_field.setCopy(str->get());
// inlineTransform can only be applied to Inline type!
header_field.inlineTransform(absl::ascii_tolower);
} else {
// Changing header_field to Reference
header_field.setReference(str->get());
}
Http::HeaderString header_value;
// Do some mutation or parameterized action.
switch (mutate_and_move.mutate_selector_case()) {
case test::common::http::MutateAndMove::kAppend:
header_value.append(replaceInvalidCharacters(mutate_and_move.append()).c_str(),
mutate_and_move.append().size());
break;
case test::common::http::MutateAndMove::kSetCopy:
header_value.setCopy(replaceInvalidCharacters(mutate_and_move.set_copy()));
break;
case test::common::http::MutateAndMove::kSetInteger:
set_integer = mutate_and_move.set_integer();
header_value.setInteger(set_integer);
break;
case test::common::http::MutateAndMove::kSetReference:
strings.emplace_back(std::make_unique<std::string>(
replaceInvalidCharacters(mutate_and_move.set_reference())));
header_value.setReference(*strings.back());
break;
default:
break;
}
// Can't addViaMove on an empty header value.
if (!header_value.empty()) {
header_map->addViaMove(std::move(header_field), std::move(header_value));
}
break;
}
case test::common::http::Action::kAppend: {
const auto& append = action.append();
lower_case_strings.emplace_back(
std::make_unique<Http::LowerCaseString>(replaceInvalidCharacters(append.key())));
strings.emplace_back(std::make_unique<std::string>(replaceInvalidCharacters(append.value())));
header_map->appendCopy(*lower_case_strings.back(), *strings.back());
break;
}
case test::common::http::Action::kCopy: {
header_map = Http::createHeaderMap<Http::RequestHeaderMapImpl>(*header_map);
break;
}
case test::common::http::Action::kRemove: {
header_map->remove(Http::LowerCaseString(replaceInvalidCharacters(action.remove())));
break;
}
case test::common::http::Action::kRemovePrefix: {
header_map->removePrefix(
Http::LowerCaseString(replaceInvalidCharacters(action.remove_prefix())));
break;
}
case test::common::http::Action::kGetAndMutate: {
// Deprecated. Can not get and mutate entries.
break;
}
default:
// Maybe nothing is set?
break;
}
// Exercise some read-only accessors.
header_map->size();
header_map->byteSize();
header_map->iterate([](const Http::HeaderEntry& header) -> Http::HeaderMap::Iterate {
header.key();
header.value();
return Http::HeaderMap::Iterate::Continue;
});
header_map->iterateReverse([](const Http::HeaderEntry& header) -> Http::HeaderMap::Iterate {
header.key();
header.value();
return Http::HeaderMap::Iterate::Continue;
});
}
}
} // namespace Envoy