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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 <cstdint>
#include <vector>
#include "base/big_endian.h"
#include "base/bind.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/strings/strcat.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/test/scoped_feature_list.h"
#include "net/base/features.h"
#include "net/base/network_change_notifier.h"
#include "net/base/privacy_mode.h"
#include "net/base/proxy_server.h"
#include "net/dns/context_host_resolver.h"
#include "net/dns/dns_client.h"
#include "net/dns/dns_config.h"
#include "net/dns/dns_query.h"
#include "net/dns/dns_test_util.h"
#include "net/dns/dns_transaction.h"
#include "net/dns/host_resolver.h"
#include "net/dns/host_resolver_manager.h"
#include "net/dns/host_resolver_proc.h"
#include "net/dns/public/dns_config_overrides.h"
#include "net/dns/public/dns_over_https_config.h"
#include "net/dns/public/secure_dns_mode.h"
#include "net/dns/public/secure_dns_policy.h"
#include "net/dns/public/util.h"
#include "net/http/http_stream_factory_test_util.h"
#include "net/log/net_log.h"
#include "net/socket/transport_client_socket_pool.h"
#include "net/ssl/ssl_config_service.h"
#include "net/ssl/test_ssl_config_service.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "net/test/embedded_test_server/http_request.h"
#include "net/test/embedded_test_server/http_response.h"
#include "net/test/gtest_util.h"
#include "net/test/ssl_test_util.h"
#include "net/test/test_doh_server.h"
#include "net/test/test_with_task_environment.h"
#include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_builder.h"
#include "net/url_request/url_request_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/platform_test.h"
#include "third_party/boringssl/src/include/openssl/ssl.h"
#include "url/scheme_host_port.h"
#include "url/url_constants.h"
namespace net {
namespace {
using net::test::IsError;
using net::test::IsOk;
const char kDohHostname[] = "doh-server.example";
const char kHostname[] = "bar.example.com";
const char kTestBody[] = "<html><body>TEST RESPONSE</body></html>";
class TestHostResolverProc : public HostResolverProc {
public:
TestHostResolverProc() : HostResolverProc(nullptr) {}
int Resolve(const std::string& hostname,
AddressFamily address_family,
HostResolverFlags host_resolver_flags,
AddressList* addrlist,
int* os_error) override {
insecure_queries_served_++;
*addrlist = AddressList::CreateFromIPAddress(IPAddress(127, 0, 0, 1), 0);
return OK;
}
uint32_t insecure_queries_served() { return insecure_queries_served_; }
private:
~TestHostResolverProc() override = default;
uint32_t insecure_queries_served_ = 0;
};
// Runs and waits for the DoH probe to complete in automatic mode. The resolver
// must have a single DoH server, and the DoH server must serve addresses for
// `kDohProbeHostname`.
class DohProber : public NetworkChangeNotifier::DNSObserver {
public:
explicit DohProber(ContextHostResolver* resolver) : resolver_(resolver) {}
void ProbeAndWaitForCompletion() {
std::unique_ptr<HostResolver::ProbeRequest> probe_request =
resolver_->CreateDohProbeRequest();
EXPECT_THAT(probe_request->Start(), IsError(ERR_IO_PENDING));
if (NumAvailableDohServers() == 0) {
NetworkChangeNotifier::AddDNSObserver(this);
loop_.Run();
NetworkChangeNotifier::RemoveDNSObserver(this);
}
EXPECT_GT(NumAvailableDohServers(), 0u);
}
void OnDNSChanged() override {
if (NumAvailableDohServers() > 0) {
loop_.Quit();
}
}
private:
size_t NumAvailableDohServers() {
ResolveContext* context = resolver_->resolve_context_for_testing();
return context->NumAvailableDohServers(
context->current_session_for_testing());
}
raw_ptr<ContextHostResolver> resolver_;
base::RunLoop loop_;
};
// A test fixture that creates a DoH server with a `URLRequestContext`
// configured to use it.
class DnsOverHttpsIntegrationTest : public TestWithTaskEnvironment {
public:
DnsOverHttpsIntegrationTest()
: host_resolver_proc_(base::MakeRefCounted<TestHostResolverProc>()) {
doh_server_.SetHostname(kDohHostname);
EXPECT_TRUE(doh_server_.Start());
// In `kAutomatic` mode, DoH support depends on a probe for
// `kDohProbeHostname`.
doh_server_.AddAddressRecord(kDohProbeHostname, IPAddress::IPv4Localhost());
ResetContext();
}
URLRequestContext* context() { return request_context_.get(); }
void ResetContext(SecureDnsMode mode = SecureDnsMode::kSecure) {
// TODO(crbug.com/1252155): Simplify this.
HostResolver::ManagerOptions manager_options;
// Without a DnsConfig, HostResolverManager will not use DoH, even in
// kSecure mode. See https://crbug.com/1251715. However,
// DnsClient::BuildEffectiveConfig special-cases overrides that override
// everything, so that gets around it. Ideally, we would instead mock out a
// system DnsConfig via the usual pathway.
manager_options.dns_config_overrides =
DnsConfigOverrides::CreateOverridingEverythingWithDefaults();
manager_options.dns_config_overrides.secure_dns_mode = mode;
manager_options.dns_config_overrides.dns_over_https_config =
*DnsOverHttpsConfig::FromString(doh_server_.GetPostOnlyTemplate());
manager_options.dns_config_overrides.use_local_ipv6 = true;
auto resolver = HostResolver::CreateStandaloneContextResolver(
/*net_log=*/nullptr, manager_options);
// Configure `resolver_` to use `host_resolver_proc_` to resolve
// `doh_server_` itself. Additionally, without an explicit HostResolverProc,
// HostResolverManager::HaveTestProcOverride disables the built-in DNS
// client.
auto* resolver_raw = resolver.get();
resolver->SetProcParamsForTesting(ProcTaskParams(host_resolver_proc_, 1));
auto context_builder = CreateTestURLRequestContextBuilder();
context_builder->set_host_resolver(std::move(resolver));
auto ssl_config_service =
std::make_unique<TestSSLConfigService>(SSLContextConfig());
ssl_config_service_ = ssl_config_service.get();
context_builder->set_ssl_config_service(std::move(ssl_config_service));
request_context_ = context_builder->Build();
if (mode == SecureDnsMode::kAutomatic) {
DohProber prober(resolver_raw);
prober.ProbeAndWaitForCompletion();
}
}
void AddHostWithEch(const url::SchemeHostPort& host,
const IPAddress& address,
base::span<const uint8_t> ech_config_list) {
doh_server_.AddAddressRecord(host.host(), address);
doh_server_.AddRecord(BuildTestHttpsServiceRecord(
dns_util::GetNameForHttpsQuery(host),
/*priority=*/1, /*service_name=*/host.host(),
{BuildTestHttpsServiceEchConfigParam(ech_config_list)}));
}
protected:
TestDohServer doh_server_;
scoped_refptr<net::TestHostResolverProc> host_resolver_proc_;
std::unique_ptr<URLRequestContext> request_context_;
raw_ptr<TestSSLConfigService> ssl_config_service_;
};
// A convenience wrapper over `DnsOverHttpsIntegrationTest` that also starts an
// HTTPS server.
class HttpsWithDnsOverHttpsTest : public DnsOverHttpsIntegrationTest {
public:
HttpsWithDnsOverHttpsTest() {
EmbeddedTestServer::ServerCertificateConfig cert_config;
cert_config.dns_names = {kHostname};
https_server_.SetSSLConfig(cert_config);
https_server_.RegisterRequestHandler(
base::BindRepeating(&HttpsWithDnsOverHttpsTest::HandleDefaultRequest,
base::Unretained(this)));
EXPECT_TRUE(https_server_.Start());
doh_server_.AddAddressRecord(kHostname, IPAddress(127, 0, 0, 1));
}
std::unique_ptr<test_server::HttpResponse> HandleDefaultRequest(
const test_server::HttpRequest& request) {
auto http_response = std::make_unique<test_server::BasicHttpResponse>();
test_https_requests_served_++;
http_response->set_content(kTestBody);
http_response->set_content_type("text/html");
return std::move(http_response);
}
protected:
EmbeddedTestServer https_server_{EmbeddedTestServer::Type::TYPE_HTTPS};
uint32_t test_https_requests_served_ = 0;
};
class TestHttpDelegate : public HttpStreamRequest::Delegate {
public:
explicit TestHttpDelegate(base::RunLoop* loop) : loop_(loop) {}
~TestHttpDelegate() override = default;
void OnStreamReady(const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
std::unique_ptr<HttpStream> stream) override {
stream->Close(false);
loop_->Quit();
}
void OnWebSocketHandshakeStreamReady(
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
std::unique_ptr<WebSocketHandshakeStreamBase> stream) override {}
void OnBidirectionalStreamImplReady(
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
std::unique_ptr<BidirectionalStreamImpl> stream) override {}
void OnStreamFailed(int status,
const NetErrorDetails& net_error_details,
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
ResolveErrorInfo resolve_eror_info) override {}
void OnCertificateError(int status,
const SSLConfig& used_ssl_config,
const SSLInfo& ssl_info) override {}
void OnNeedsProxyAuth(const HttpResponseInfo& proxy_response,
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
HttpAuthController* auth_controller) override {}
void OnNeedsClientAuth(const SSLConfig& used_ssl_config,
SSLCertRequestInfo* cert_info) override {}
void OnQuicBroken() override {}
private:
raw_ptr<base::RunLoop> loop_;
};
// This test sets up a request which will reenter the connection pools by
// triggering a DNS over HTTPS request. It also sets up an idle socket
// which was a precondition for the crash we saw in https://crbug.com/830917.
TEST_F(HttpsWithDnsOverHttpsTest, EndToEnd) {
// Create and start http server.
EmbeddedTestServer http_server(EmbeddedTestServer::Type::TYPE_HTTP);
http_server.RegisterRequestHandler(
base::BindRepeating(&HttpsWithDnsOverHttpsTest::HandleDefaultRequest,
base::Unretained(this)));
EXPECT_TRUE(http_server.Start());
// Set up an idle socket.
HttpTransactionFactory* transaction_factory =
request_context_->http_transaction_factory();
HttpStreamFactory::JobFactory default_job_factory;
HttpNetworkSession* network_session = transaction_factory->GetSession();
base::RunLoop loop;
TestHttpDelegate request_delegate(&loop);
HttpStreamFactory* factory = network_session->http_stream_factory();
HttpRequestInfo request_info;
request_info.method = "GET";
request_info.url = http_server.GetURL("localhost", "/preconnect");
std::unique_ptr<HttpStreamRequest> request(factory->RequestStream(
request_info, DEFAULT_PRIORITY, SSLConfig(), SSLConfig(),
&request_delegate, false, false, NetLogWithSource()));
loop.Run();
ClientSocketPool::GroupId group_id(
url::SchemeHostPort(request_info.url), PrivacyMode::PRIVACY_MODE_DISABLED,
NetworkIsolationKey(), SecureDnsPolicy::kAllow);
EXPECT_EQ(network_session
->GetSocketPool(HttpNetworkSession::NORMAL_SOCKET_POOL,
ProxyServer::Direct())
->IdleSocketCountInGroup(group_id),
1u);
// The domain "localhost" is resolved locally, so no DNS lookups should have
// occurred.
EXPECT_EQ(doh_server_.QueriesServed(), 0);
EXPECT_EQ(host_resolver_proc_->insecure_queries_served(), 0u);
// A stream was established, but no HTTPS request has been made yet.
EXPECT_EQ(test_https_requests_served_, 0u);
// Make a request that will trigger a DoH query as well.
TestDelegate d;
GURL main_url = https_server_.GetURL(kHostname, "/test");
std::unique_ptr<URLRequest> req(context()->CreateRequest(
main_url, DEFAULT_PRIORITY, &d, TRAFFIC_ANNOTATION_FOR_TESTS));
req->Start();
base::RunLoop().Run();
EXPECT_TRUE(https_server_.ShutdownAndWaitUntilComplete());
EXPECT_TRUE(http_server.ShutdownAndWaitUntilComplete());
EXPECT_TRUE(doh_server_.ShutdownAndWaitUntilComplete());
// There should be two DoH lookups for kHostname (both A and AAAA records are
// queried).
EXPECT_EQ(doh_server_.QueriesServed(), 2);
// The requests to the DoH server are pooled, so there should only be one
// insecure lookup for the DoH server hostname.
EXPECT_EQ(host_resolver_proc_->insecure_queries_served(), 1u);
// There should be one non-DoH HTTPS request for the connection to kHostname.
EXPECT_EQ(test_https_requests_served_, 1u);
EXPECT_TRUE(d.response_completed());
EXPECT_EQ(d.request_status(), 0);
EXPECT_EQ(d.data_received(), kTestBody);
}
TEST_F(HttpsWithDnsOverHttpsTest, EndToEndFail) {
// Fail all DoH requests.
doh_server_.SetFailRequests(true);
// Make a request that will trigger a DoH query.
TestDelegate d;
GURL main_url = https_server_.GetURL(kHostname, "/test");
std::unique_ptr<URLRequest> req(context()->CreateRequest(
main_url, DEFAULT_PRIORITY, &d, TRAFFIC_ANNOTATION_FOR_TESTS));
req->Start();
base::RunLoop().Run();
EXPECT_TRUE(https_server_.ShutdownAndWaitUntilComplete());
EXPECT_TRUE(doh_server_.ShutdownAndWaitUntilComplete());
// No HTTPS connection to the test server will be attempted due to the
// host resolution error.
EXPECT_EQ(test_https_requests_served_, 0u);
EXPECT_TRUE(d.response_completed());
EXPECT_EQ(d.request_status(), net::ERR_NAME_NOT_RESOLVED);
const auto& resolve_error_info = req->response_info().resolve_error_info;
EXPECT_TRUE(resolve_error_info.is_secure_network_error);
EXPECT_EQ(resolve_error_info.error, net::ERR_DNS_MALFORMED_RESPONSE);
}
// An end-to-end test of the HTTPS upgrade behavior.
TEST_F(HttpsWithDnsOverHttpsTest, HttpsUpgrade) {
base::test::ScopedFeatureList features;
features.InitAndEnableFeatureWithParameters(
features::kUseDnsHttpsSvcb, {{"UseDnsHttpsSvcbHttpUpgrade", "true"}});
ResetContext();
GURL https_url = https_server_.GetURL(kHostname, "/test");
EXPECT_TRUE(https_url.SchemeIs(url::kHttpsScheme));
GURL::Replacements replacements;
replacements.SetSchemeStr(url::kHttpScheme);
GURL http_url = https_url.ReplaceComponents(replacements);
// `service_name` is `kHostname` rather than "." because "." specifies the
// query name. For non-defaults ports, the query name uses port prefix naming
// and does not match the A/AAAA records.
doh_server_.AddRecord(BuildTestHttpsServiceRecord(
dns_util::GetNameForHttpsQuery(url::SchemeHostPort(https_url)),
/*priority=*/1, /*service_name=*/kHostname, /*params=*/{}));
for (auto mode : {SecureDnsMode::kSecure, SecureDnsMode::kAutomatic}) {
SCOPED_TRACE(kSecureDnsModes.at(mode));
ResetContext(mode);
// Fetch the http URL.
TestDelegate d;
std::unique_ptr<URLRequest> req(context()->CreateRequest(
http_url, DEFAULT_PRIORITY, &d, TRAFFIC_ANNOTATION_FOR_TESTS));
req->Start();
base::RunLoop().Run();
ASSERT_THAT(d.request_status(), IsOk());
// The request should have been redirected to https.
EXPECT_EQ(d.received_redirect_count(), 1);
EXPECT_EQ(req->url(), https_url);
EXPECT_TRUE(d.response_completed());
EXPECT_EQ(d.request_status(), 0);
EXPECT_EQ(d.data_received(), kTestBody);
}
}
// An end-to-end test for requesting a domain with a basic HTTPS record. Expect
// this to exercise connection logic for extra HostResolver results with
// metadata.
TEST_F(HttpsWithDnsOverHttpsTest, HttpsMetadata) {
base::test::ScopedFeatureList features;
features.InitAndEnableFeatureWithParameters(
features::kUseDnsHttpsSvcb, {{"UseDnsHttpsSvcbHttpUpgrade", "true"}});
ResetContext();
GURL main_url = https_server_.GetURL(kHostname, "/test");
EXPECT_TRUE(main_url.SchemeIs(url::kHttpsScheme));
doh_server_.AddRecord(BuildTestHttpsServiceRecord(
dns_util::GetNameForHttpsQuery(url::SchemeHostPort(main_url)),
/*priority=*/1, /*service_name=*/kHostname, /*params=*/{}));
// Fetch the http URL.
TestDelegate d;
std::unique_ptr<URLRequest> req(context()->CreateRequest(
main_url, DEFAULT_PRIORITY, &d, TRAFFIC_ANNOTATION_FOR_TESTS));
req->Start();
base::RunLoop().Run();
ASSERT_THAT(d.request_status(), IsOk());
// There should be three DoH lookups for kHostname (A, AAAA, and HTTPS).
EXPECT_EQ(doh_server_.QueriesServed(), 3);
EXPECT_TRUE(d.response_completed());
EXPECT_EQ(d.request_status(), 0);
EXPECT_EQ(d.data_received(), kTestBody);
}
TEST_F(DnsOverHttpsIntegrationTest, EncryptedClientHello) {
// Configure a test server that speaks ECH.
static constexpr char kRealName[] = "secret.example";
static constexpr char kPublicName[] = "public.example";
EmbeddedTestServer::ServerCertificateConfig server_cert_config;
server_cert_config.dns_names = {kRealName};
SSLServerConfig ssl_server_config;
std::vector<uint8_t> ech_config_list;
ssl_server_config.ech_keys =
MakeTestEchKeys(kPublicName, /*max_name_len=*/128, &ech_config_list);
ASSERT_TRUE(ssl_server_config.ech_keys);
EmbeddedTestServer test_server(EmbeddedTestServer::TYPE_HTTPS);
test_server.SetSSLConfig(server_cert_config, ssl_server_config);
RegisterDefaultHandlers(&test_server);
ASSERT_TRUE(test_server.Start());
AddressList addr;
ASSERT_TRUE(test_server.GetAddressList(&addr));
GURL url = test_server.GetURL(kRealName, "/defaultresponse");
AddHostWithEch(url::SchemeHostPort(url), addr.front().address(),
ech_config_list);
for (bool feature_enabled : {true, false}) {
SCOPED_TRACE(feature_enabled);
base::test::ScopedFeatureList features;
if (feature_enabled) {
features.InitWithFeatures(
/*enabled_features=*/{features::kUseDnsHttpsSvcb,
features::kEncryptedClientHello},
/*disabled_features=*/{});
} else {
features.InitWithFeatures(
/*enabled_features=*/{features::kUseDnsHttpsSvcb},
/*disabled_features=*/{features::kEncryptedClientHello});
}
for (bool config_enabled : {true, false}) {
SCOPED_TRACE(config_enabled);
bool ech_enabled = feature_enabled && config_enabled;
// Create a new `URLRequestContext`, to ensure there are no cached
// sockets, etc., from the previous loop iteration.
ResetContext();
SSLContextConfig config;
config.ech_enabled = config_enabled;
ssl_config_service_->UpdateSSLConfigAndNotify(config);
TestDelegate d;
std::unique_ptr<URLRequest> r = context()->CreateRequest(
url, DEFAULT_PRIORITY, &d, TRAFFIC_ANNOTATION_FOR_TESTS);
r->Start();
EXPECT_TRUE(r->is_pending());
d.RunUntilComplete();
EXPECT_THAT(d.request_status(), IsOk());
EXPECT_EQ(1, d.response_started_count());
EXPECT_FALSE(d.received_data_before_response());
EXPECT_NE(0, d.bytes_received());
EXPECT_EQ(ech_enabled, r->ssl_info().encrypted_client_hello);
}
}
}
// Test that, if the DNS returns a stale ECHConfigList (or other key mismatch),
// the client can recover and connect to the server, provided the server can
// handshake as the public name.
TEST_F(DnsOverHttpsIntegrationTest, EncryptedClientHelloStaleKey) {
base::test::ScopedFeatureList features;
features.InitWithFeatures(
/*enabled_features=*/{features::kEncryptedClientHello,
features::kUseDnsHttpsSvcb},
/*disabled_features=*/{});
ResetContext();
static constexpr char kRealNameStale[] = "secret1.example";
static constexpr char kRealNameWrongPublicName[] = "secret2.example";
static constexpr char kPublicName[] = "public.example";
static constexpr char kWrongPublicName[] = "wrong-public.example";
std::vector<uint8_t> ech_config_list, ech_config_list_stale,
ech_config_list_wrong_public_name;
bssl::UniquePtr<SSL_ECH_KEYS> ech_keys =
MakeTestEchKeys(kPublicName, /*max_name_len=*/128, &ech_config_list);
ASSERT_TRUE(ech_keys);
ASSERT_TRUE(MakeTestEchKeys(kPublicName, /*max_name_len=*/128,
&ech_config_list_stale));
ASSERT_TRUE(MakeTestEchKeys(kWrongPublicName, /*max_name_len=*/128,
&ech_config_list_wrong_public_name));
// Configure an ECH-supporting server that can speak for all names except
// `kWrongPublicName`.
EmbeddedTestServer::ServerCertificateConfig server_cert_config;
server_cert_config.dns_names = {kRealNameStale, kRealNameWrongPublicName,
kPublicName};
SSLServerConfig ssl_server_config;
ssl_server_config.ech_keys = std::move(ech_keys);
EmbeddedTestServer test_server(EmbeddedTestServer::TYPE_HTTPS);
test_server.SetSSLConfig(server_cert_config, ssl_server_config);
RegisterDefaultHandlers(&test_server);
ASSERT_TRUE(test_server.Start());
AddressList addr;
ASSERT_TRUE(test_server.GetAddressList(&addr));
GURL url_stale = test_server.GetURL(kRealNameStale, "/defaultresponse");
GURL url_wrong_public_name =
test_server.GetURL(kRealNameWrongPublicName, "/defaultresponse");
AddHostWithEch(url::SchemeHostPort(url_stale), addr.front().address(),
ech_config_list_stale);
AddHostWithEch(url::SchemeHostPort(url_wrong_public_name),
addr.front().address(), ech_config_list_wrong_public_name);
// Connecting to `url_stale` should succeed. Although the server will not
// decrypt the ClientHello, it can handshake as `kPublicName` and provide new
// keys for the client to use.
{
TestDelegate d;
std::unique_ptr<URLRequest> r = context()->CreateRequest(
url_stale, DEFAULT_PRIORITY, &d, TRAFFIC_ANNOTATION_FOR_TESTS);
r->Start();
EXPECT_TRUE(r->is_pending());
d.RunUntilComplete();
EXPECT_THAT(d.request_status(), IsOk());
EXPECT_EQ(1, d.response_started_count());
EXPECT_FALSE(d.received_data_before_response());
EXPECT_NE(0, d.bytes_received());
EXPECT_TRUE(r->ssl_info().encrypted_client_hello);
}
// Connecting to `url_wrong_public_name` should fail. The server can neither
// decrypt the ClientHello, nor handshake as `kWrongPublicName`.
{
TestDelegate d;
std::unique_ptr<URLRequest> r =
context()->CreateRequest(url_wrong_public_name, DEFAULT_PRIORITY, &d,
TRAFFIC_ANNOTATION_FOR_TESTS);
r->Start();
EXPECT_TRUE(r->is_pending());
d.RunUntilComplete();
EXPECT_THAT(d.request_status(),
IsError(ERR_ECH_FALLBACK_CERTIFICATE_INVALID));
}
}
TEST_F(DnsOverHttpsIntegrationTest, EncryptedClientHelloFallback) {
base::test::ScopedFeatureList features;
features.InitWithFeatures(
/*enabled_features=*/{features::kEncryptedClientHello,
features::kUseDnsHttpsSvcb},
/*disabled_features=*/{});
ResetContext();
static constexpr char kRealNameStale[] = "secret1.example";
static constexpr char kRealNameWrongPublicName[] = "secret2.example";
static constexpr char kPublicName[] = "public.example";
static constexpr char kWrongPublicName[] = "wrong-public.example";
std::vector<uint8_t> ech_config_list_stale, ech_config_list_wrong_public_name;
ASSERT_TRUE(MakeTestEchKeys(kPublicName, /*max_name_len=*/128,
&ech_config_list_stale));
ASSERT_TRUE(MakeTestEchKeys(kWrongPublicName, /*max_name_len=*/128,
&ech_config_list_wrong_public_name));
// Configure a server, without ECH, that can speak for all names except
// `kWrongPublicName`.
EmbeddedTestServer::ServerCertificateConfig server_cert_config;
server_cert_config.dns_names = {kRealNameStale, kRealNameWrongPublicName,
kPublicName};
EmbeddedTestServer test_server(EmbeddedTestServer::TYPE_HTTPS);
test_server.SetSSLConfig(server_cert_config);
RegisterDefaultHandlers(&test_server);
ASSERT_TRUE(test_server.Start());
AddressList addr;
ASSERT_TRUE(test_server.GetAddressList(&addr));
GURL url_stale = test_server.GetURL(kRealNameStale, "/defaultresponse");
GURL url_wrong_public_name =
test_server.GetURL(kRealNameWrongPublicName, "/defaultresponse");
AddHostWithEch(url::SchemeHostPort(url_stale), addr.front().address(),
ech_config_list_stale);
AddHostWithEch(url::SchemeHostPort(url_wrong_public_name),
addr.front().address(), ech_config_list_wrong_public_name);
// Connecting to `url_stale` should succeed. Although the server will not
// decrypt the ClientHello, it can handshake as `kPublicName` and trigger an
// authenticated fallback.
{
TestDelegate d;
std::unique_ptr<URLRequest> r = context()->CreateRequest(
url_stale, DEFAULT_PRIORITY, &d, TRAFFIC_ANNOTATION_FOR_TESTS);
r->Start();
EXPECT_TRUE(r->is_pending());
d.RunUntilComplete();
EXPECT_THAT(d.request_status(), IsOk());
EXPECT_EQ(1, d.response_started_count());
EXPECT_FALSE(d.received_data_before_response());
EXPECT_NE(0, d.bytes_received());
EXPECT_FALSE(r->ssl_info().encrypted_client_hello);
}
// Connecting to `url_wrong_public_name` should fail. The server can neither
// decrypt the ClientHello, nor handshake as `kWrongPublicName`.
{
TestDelegate d;
std::unique_ptr<URLRequest> r =
context()->CreateRequest(url_wrong_public_name, DEFAULT_PRIORITY, &d,
TRAFFIC_ANNOTATION_FOR_TESTS);
r->Start();
EXPECT_TRUE(r->is_pending());
d.RunUntilComplete();
EXPECT_THAT(d.request_status(),
IsError(ERR_ECH_FALLBACK_CERTIFICATE_INVALID));
}
}
TEST_F(DnsOverHttpsIntegrationTest, EncryptedClientHelloFallbackTLS12) {
base::test::ScopedFeatureList features;
features.InitWithFeatures(
/*enabled_features=*/{features::kEncryptedClientHello,
features::kUseDnsHttpsSvcb},
/*disabled_features=*/{});
ResetContext();
static constexpr char kRealNameStale[] = "secret1.example";
static constexpr char kRealNameWrongPublicName[] = "secret2.example";
static constexpr char kPublicName[] = "public.example";
static constexpr char kWrongPublicName[] = "wrong-public.example";
std::vector<uint8_t> ech_config_list_stale, ech_config_list_wrong_public_name;
ASSERT_TRUE(MakeTestEchKeys(kPublicName, /*max_name_len=*/128,
&ech_config_list_stale));
ASSERT_TRUE(MakeTestEchKeys(kWrongPublicName, /*max_name_len=*/128,
&ech_config_list_wrong_public_name));
// Configure a server, without ECH or TLS 1.3, that can speak for all names
// except `kWrongPublicName`.
EmbeddedTestServer::ServerCertificateConfig server_cert_config;
server_cert_config.dns_names = {kRealNameStale, kRealNameWrongPublicName,
kPublicName};
SSLServerConfig ssl_server_config;
ssl_server_config.version_max = SSL_PROTOCOL_VERSION_TLS1_2;
EmbeddedTestServer test_server(EmbeddedTestServer::TYPE_HTTPS);
test_server.SetSSLConfig(server_cert_config, ssl_server_config);
RegisterDefaultHandlers(&test_server);
ASSERT_TRUE(test_server.Start());
AddressList addr;
ASSERT_TRUE(test_server.GetAddressList(&addr));
GURL url_stale = test_server.GetURL(kRealNameStale, "/defaultresponse");
GURL url_wrong_public_name =
test_server.GetURL(kRealNameWrongPublicName, "/defaultresponse");
AddHostWithEch(url::SchemeHostPort(url_stale), addr.front().address(),
ech_config_list_stale);
AddHostWithEch(url::SchemeHostPort(url_wrong_public_name),
addr.front().address(), ech_config_list_wrong_public_name);
// Connecting to `url_stale` should succeed. Although the server will not
// decrypt the ClientHello, it can handshake as `kPublicName` and trigger an
// authenticated fallback.
{
TestDelegate d;
std::unique_ptr<URLRequest> r = context()->CreateRequest(
url_stale, DEFAULT_PRIORITY, &d, TRAFFIC_ANNOTATION_FOR_TESTS);
r->Start();
EXPECT_TRUE(r->is_pending());
d.RunUntilComplete();
EXPECT_THAT(d.request_status(), IsOk());
EXPECT_EQ(1, d.response_started_count());
EXPECT_FALSE(d.received_data_before_response());
EXPECT_NE(0, d.bytes_received());
EXPECT_FALSE(r->ssl_info().encrypted_client_hello);
}
// Connecting to `url_wrong_public_name` should fail. The server can neither
// decrypt the ClientHello, nor handshake as `kWrongPublicName`.
{
TestDelegate d;
std::unique_ptr<URLRequest> r =
context()->CreateRequest(url_wrong_public_name, DEFAULT_PRIORITY, &d,
TRAFFIC_ANNOTATION_FOR_TESTS);
r->Start();
EXPECT_TRUE(r->is_pending());
d.RunUntilComplete();
EXPECT_THAT(d.request_status(),
IsError(ERR_ECH_FALLBACK_CERTIFICATE_INVALID));
}
}
} // namespace
} // namespace net
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