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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/at_exit.h"
#include "base/i18n/icu_util.h"
#include "base/no_destructor.h"
#include "base/task/post_task.h"
#include "base/test/scoped_feature_list.h"
#include "base/test/test_timeouts.h"
#include "content/browser/appcache/appcache_dispatcher_host.h"
#include "content/browser/appcache/appcache_fuzzer.pb.h"
#include "content/browser/appcache/chrome_appcache_service.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/test/test_browser_thread_bundle.h"
#include "content/test/test_content_browser_client.h"
#include "content/test/test_content_client.h"
#include "mojo/core/embedder/embedder.h"
#include "services/network/public/cpp/features.h"
#include "services/network/test/test_url_loader_factory.h"
#include "storage/browser/test/mock_special_storage_policy.h"
#include "third_party/blink/public/mojom/appcache/appcache.mojom.h"
#include "third_party/libprotobuf-mutator/src/src/libfuzzer/libfuzzer_macro.h"
namespace content {
namespace {
struct Env {
Env()
: thread_bundle((base::CommandLine::Init(0, nullptr),
TestTimeouts::Initialize(),
base::test::ScopedTaskEnvironment::MainThreadType::IO)) {
logging::SetMinLogLevel(logging::LOG_FATAL);
mojo::core::Init();
feature_list.InitWithFeatures({network::features::kNetworkService}, {});
test_content_client = std::make_unique<TestContentClient>();
test_content_browser_client = std::make_unique<TestContentBrowserClient>();
SetContentClient(test_content_client.get());
SetBrowserClientForTesting(test_content_browser_client.get());
CHECK(base::i18n::InitializeICU());
}
void InitializeAppCacheService(
network::TestURLLoaderFactory* mock_url_loader_factory) {
appcache_service = new ChromeAppCacheService(/*proxy=*/nullptr);
scoped_refptr<URLLoaderFactoryGetter> loader_factory_getter =
base::MakeRefCounted<URLLoaderFactoryGetter>();
loader_factory_getter->SetNetworkFactoryForTesting(mock_url_loader_factory);
appcache_service->set_url_loader_factory_getter(
loader_factory_getter.get());
base::PostTaskWithTraits(
FROM_HERE, {BrowserThread::IO},
base::BindOnce(&ChromeAppCacheService::InitializeOnIOThread,
appcache_service, base::FilePath(),
/*resource_context=*/nullptr,
/*request_context_getter=*/nullptr,
/*special_storage_policy=*/nullptr));
thread_bundle.RunUntilIdle();
}
TestBrowserThreadBundle thread_bundle;
base::test::ScopedFeatureList feature_list;
scoped_refptr<ChromeAppCacheService> appcache_service;
std::unique_ptr<TestContentClient> test_content_client;
std::unique_ptr<TestContentBrowserClient> test_content_browser_client;
// used by ICU integration.
base::AtExitManager at_exit_manager;
};
Env& SingletonEnv() {
static base::NoDestructor<Env> env;
return *env;
}
void HeadersToRaw(std::string* headers) {
std::replace(headers->begin(), headers->end(), '\n', '\0');
if (!headers->empty())
headers += '\0';
}
std::string GetUrl(const fuzzing::proto::Url& url) {
if (url.url_test_case_idx() == fuzzing::proto::EMPTY) {
return "";
}
return "http://localhost/" + std::to_string(url.url_test_case_idx());
}
std::string GetManifest(
const fuzzing::proto::ManifestResponse& manifest_response) {
std::string response = "CACHE MANIFEST\n";
for (const fuzzing::proto::Url& url : manifest_response.urls()) {
response += GetUrl(url) + "\n";
}
return response;
}
void DoRequest(network::TestURLLoaderFactory* factory,
const fuzzing::proto::Url& url,
uint32_t code,
bool do_not_cache,
const fuzzing::proto::ManifestResponse& manifest_response) {
network::URLLoaderCompletionStatus status;
status.error_code = net::OK;
network::ResourceResponseHead response;
std::string headers = "HTTP/1.1 ";
headers += std::to_string(code);
headers += "\n";
if (do_not_cache) {
headers += "Cache-Control: no-cache, no-store, must-revalidate\n";
headers += "Pragma: no-cache\n";
headers += "Expires: 0\n";
headers += "DNT: 1\n";
}
HeadersToRaw(&headers);
response.headers = new net::HttpResponseHeaders(headers);
// To simplify the fuzzer, we respond to all requests with a manifest.
// When we're performing a manifest fetch, this data will affect the
// control flow of the appcache code. Otherwise it's just treated like
// a blob of data.
std::string content = GetManifest(manifest_response);
content += "\n# ";
factory->SimulateResponseForPendingRequest(
GURL(GetUrl(url)), status, response, content,
network::TestURLLoaderFactory::kUrlMatchPrefix);
}
} // anonymous namespace
DEFINE_BINARY_PROTO_FUZZER(const fuzzing::proto::Session& session) {
network::TestURLLoaderFactory mock_url_loader_factory;
SingletonEnv().InitializeAppCacheService(&mock_url_loader_factory);
// Create a context for mojo::ReportBadMessage.
mojo::Message message;
auto dispatch_context =
std::make_unique<mojo::internal::MessageDispatchContext>(&message);
blink::mojom::AppCacheBackendPtr host;
AppCacheDispatcherHost::Create(SingletonEnv().appcache_service.get(),
/*process_id=*/1, mojo::MakeRequest(&host));
for (const fuzzing::proto::Command& command : session.commands()) {
switch (command.command_case()) {
case fuzzing::proto::Command::kRegisterHost: {
int32_t host_id = command.register_host().host_id();
host->RegisterHost(host_id);
break;
}
case fuzzing::proto::Command::kUnregisterHost: {
int32_t host_id = command.unregister_host().host_id();
host->UnregisterHost(host_id);
break;
}
case fuzzing::proto::Command::kSelectCache: {
int32_t host_id = command.select_cache().host_id();
int32_t from_id = command.select_cache().from_id();
GURL document_url = GURL(GetUrl(command.select_cache().document_url()));
GURL opt_manifest_url =
GURL(GetUrl(command.select_cache().opt_manifest_url()));
host->SelectCache(host_id, document_url, from_id, opt_manifest_url);
break;
}
case fuzzing::proto::Command::kSetSpawningHostId: {
int32_t host_id = command.set_spawning_host_id().host_id();
int32_t spawning_host_id =
command.set_spawning_host_id().spawning_host_id();
host->SetSpawningHostId(host_id, spawning_host_id);
break;
}
case fuzzing::proto::Command::kSelectCacheForSharedWorker: {
int32_t host_id = command.select_cache_for_shared_worker().host_id();
int64_t cache_document_was_loaded_from =
command.select_cache_for_shared_worker()
.cache_document_was_loaded_from();
host->SelectCacheForSharedWorker(host_id,
cache_document_was_loaded_from);
break;
}
case fuzzing::proto::Command::kMarkAsForeignEntry: {
int32_t host_id = command.mark_as_foreign_entry().host_id();
GURL url(GetUrl(command.mark_as_foreign_entry().document_url()));
int64_t cache_document_was_loaded_from =
command.mark_as_foreign_entry().cache_document_was_loaded_from();
host->MarkAsForeignEntry(host_id, url, cache_document_was_loaded_from);
break;
}
case fuzzing::proto::Command::kGetStatus: {
int32_t host_id = command.get_status().host_id();
host->GetStatus(host_id, base::DoNothing());
break;
}
case fuzzing::proto::Command::kStartUpdate: {
int32_t host_id = command.start_update().host_id();
host->StartUpdate(host_id, base::DoNothing());
break;
}
case fuzzing::proto::Command::kSwapCache: {
int32_t host_id = command.swap_cache().host_id();
host->SwapCache(host_id, base::DoNothing());
break;
}
case fuzzing::proto::Command::kGetResourceList: {
int32_t host_id = command.get_resource_list().host_id();
host->GetResourceList(host_id, base::DoNothing());
break;
}
case fuzzing::proto::Command::kDoRequest: {
uint32_t code = command.do_request().http_code();
bool do_not_cache = command.do_request().do_not_cache();
const fuzzing::proto::ManifestResponse& manifest_response =
command.do_request().manifest_response();
DoRequest(&mock_url_loader_factory, command.do_request().url(), code,
do_not_cache, manifest_response);
break;
}
case fuzzing::proto::Command::kRunUntilIdle: {
SingletonEnv().thread_bundle.RunUntilIdle();
break;
}
case fuzzing::proto::Command::COMMAND_NOT_SET: {
break;
}
}
}
host.reset();
// TODO(nedwilliamson): Investigate removing this or reinitializing
// the appcache service as a fuzzer command.
SingletonEnv().thread_bundle.RunUntilIdle();
}
} // namespace content
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