chromeos/network/client_cert_resolver_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4 #include "chromeos/network/client_cert_resolver.h"
   5
   6 #include <cert.h>
   7 #include <pk11pub.h>
   8
   9 #include "base/bind.h"
  10 #include "base/bind_helpers.h"
  11 #include "base/files/file_path.h"
  12 #include "base/files/file_util.h"
  13 #include "base/json/json_reader.h"
  14 #include "base/run_loop.h"
  15 #include "base/strings/stringprintf.h"
  16 #include "base/values.h"
  17 #include "chromeos/cert_loader.h"
  18 #include "chromeos/dbus/dbus_thread_manager.h"
  19 #include "chromeos/dbus/shill_manager_client.h"
  20 #include "chromeos/dbus/shill_profile_client.h"
  21 #include "chromeos/dbus/shill_service_client.h"
  22 #include "chromeos/network/managed_network_configuration_handler_impl.h"
  23 #include "chromeos/network/network_configuration_handler.h"
  24 #include "chromeos/network/network_profile_handler.h"
  25 #include "chromeos/network/network_state_handler.h"
  26 #include "components/onc/onc_constants.h"
  27 #include "crypto/scoped_nss_types.h"
  28 #include "crypto/scoped_test_nss_db.h"
  29 #include "net/base/net_errors.h"
  30 #include "net/base/test_data_directory.h"
  31 #include "net/cert/nss_cert_database_chromeos.h"
  32 #include "net/cert/x509_certificate.h"
  33 #include "net/test/cert_test_util.h"
  34 #include "testing/gtest/include/gtest/gtest.h"
  35 #include "third_party/cros_system_api/dbus/service_constants.h"
  36
  37 namespace chromeos {
  38
  39 namespace {
  40
  41 const char* kWifiStub = "wifi_stub";
  42 const char* kWifiSSID = "wifi_ssid";
  43 const char* kUserProfilePath = "user_profile";
  44 const char* kUserHash = "user_hash";
  45
  46 }  // namespace
  47
  48 class ClientCertResolverTest : public testing::Test,
  49                                public ClientCertResolver::Observer {
  50  public:
  51   ClientCertResolverTest()
  52       : network_properties_changed_count_(0),
  53         service_test_(NULL),
  54         profile_test_(NULL),
  55         cert_loader_(NULL) {}
  56   ~ClientCertResolverTest() override {}
  57
  58   void SetUp() override {
  59     ASSERT_TRUE(test_nssdb_.is_open());
  60
  61     // Use the same DB for public and private slot.
  62     test_nsscertdb_.reset(new net::NSSCertDatabaseChromeOS(
  63         crypto::ScopedPK11Slot(PK11_ReferenceSlot(test_nssdb_.slot())),
  64         crypto::ScopedPK11Slot(PK11_ReferenceSlot(test_nssdb_.slot()))));
  65     test_nsscertdb_->SetSlowTaskRunnerForTest(message_loop_.task_runner());
  66
  67     DBusThreadManager::Initialize();
  68     service_test_ =
  69         DBusThreadManager::Get()->GetShillServiceClient()->GetTestInterface();
  70     profile_test_ =
  71         DBusThreadManager::Get()->GetShillProfileClient()->GetTestInterface();
  72     profile_test_->AddProfile(kUserProfilePath, kUserHash);
  73     base::RunLoop().RunUntilIdle();
  74     service_test_->ClearServices();
  75     base::RunLoop().RunUntilIdle();
  76
  77     CertLoader::Initialize();
  78     cert_loader_ = CertLoader::Get();
  79     CertLoader::ForceHardwareBackedForTesting();
  80   }
  81
  82   void TearDown() override {
  83     client_cert_resolver_->RemoveObserver(this);
  84     client_cert_resolver_.reset();
  85     managed_config_handler_.reset();
  86     network_config_handler_.reset();
  87     network_profile_handler_.reset();
  88     network_state_handler_.reset();
  89     CertLoader::Shutdown();
  90     DBusThreadManager::Shutdown();
  91   }
  92
  93  protected:
  94   void StartCertLoader() {
  95     cert_loader_->StartWithNSSDB(test_nsscertdb_.get());
  96     if (test_client_cert_.get()) {
  97       int slot_id = 0;
  98       const std::string pkcs11_id =
  99           CertLoader::GetPkcs11IdAndSlotForCert(*test_client_cert_, &slot_id);
 100       test_cert_id_ = base::StringPrintf("%i:%s", slot_id, pkcs11_id.c_str());
 101     }
 102   }
 103
 104   // Imports a CA cert (stored as PEM in test_ca_cert_pem_) and a client
 105   // certificate signed by that CA. Its PKCS#11 ID is stored in
 106   // |test_cert_id_|.
 107   void SetupTestCerts() {
 108     // Import a CA cert.
 109     net::CertificateList ca_cert_list =
 110         net::CreateCertificateListFromFile(net::GetTestCertsDirectory(),
 111                                            "client_1_ca.pem",
 112                                            net::X509Certificate::FORMAT_AUTO);
 113     ASSERT_TRUE(!ca_cert_list.empty());
 114     net::NSSCertDatabase::ImportCertFailureList failures;
 115     EXPECT_TRUE(test_nsscertdb_->ImportCACerts(
 116         ca_cert_list, net::NSSCertDatabase::TRUST_DEFAULT, &failures));
 117     ASSERT_TRUE(failures.empty()) << net::ErrorToString(failures[0].net_error);
 118
 119     net::X509Certificate::GetPEMEncoded(ca_cert_list[0]->os_cert_handle(),
 120                                         &test_ca_cert_pem_);
 121     ASSERT_TRUE(!test_ca_cert_pem_.empty());
 122
 123     // Import a client cert signed by that CA.
 124     test_client_cert_ =
 125         net::ImportClientCertAndKeyFromFile(net::GetTestCertsDirectory(),
 126                                             "client_1.pem",
 127                                             "client_1.pk8",
 128                                             test_nssdb_.slot());
 129     ASSERT_TRUE(test_client_cert_.get());
 130   }
 131
 132   void SetupNetworkHandlers() {
 133     network_state_handler_.reset(NetworkStateHandler::InitializeForTest());
 134     network_profile_handler_.reset(new NetworkProfileHandler());
 135     network_config_handler_.reset(new NetworkConfigurationHandler());
 136     managed_config_handler_.reset(new ManagedNetworkConfigurationHandlerImpl());
 137     client_cert_resolver_.reset(new ClientCertResolver());
 138
 139     network_profile_handler_->Init();
 140     network_config_handler_->Init(network_state_handler_.get(),
 141                                   NULL /* network_device_handler */);
 142     managed_config_handler_->Init(network_state_handler_.get(),
 143                                   network_profile_handler_.get(),
 144                                   network_config_handler_.get(),
 145                                   NULL /* network_device_handler */);
 146     // Run all notifications before starting the cert loader to reduce run time.
 147     base::RunLoop().RunUntilIdle();
 148
 149     client_cert_resolver_->Init(network_state_handler_.get(),
 150                                 managed_config_handler_.get());
 151     client_cert_resolver_->AddObserver(this);
 152     client_cert_resolver_->SetSlowTaskRunnerForTest(
 153         message_loop_.task_runner());
 154   }
 155
 156   void SetupWifi() {
 157     service_test_->SetServiceProperties(kWifiStub,
 158                                         kWifiStub,
 159                                         kWifiSSID,
 160                                         shill::kTypeWifi,
 161                                         shill::kStateOnline,
 162                                         true /* visible */);
 163     // Set an arbitrary cert id, so that we can check afterwards whether we
 164     // cleared the property or not.
 165     service_test_->SetServiceProperty(
 166         kWifiStub, shill::kEapCertIdProperty, base::StringValue("invalid id"));
 167     profile_test_->AddService(kUserProfilePath, kWifiStub);
 168
 169     DBusThreadManager::Get()
 170         ->GetShillManagerClient()
 171         ->GetTestInterface()
 172         ->AddManagerService(kWifiStub, true);
 173   }
 174
 175   // Setup a policy with a certificate pattern that matches any client cert that
 176   // is signed by the test CA cert (stored in |test_ca_cert_pem_|). In
 177   // particular it will match the test client cert.
 178   void SetupPolicy() {
 179     const char* kTestPolicyTemplate =
 180         "[ { \"GUID\": \"wifi_stub\","
 181         "    \"Name\": \"wifi_stub\","
 182         "    \"Type\": \"WiFi\","
 183         "    \"WiFi\": {"
 184         "      \"Security\": \"WPA-EAP\","
 185         "      \"SSID\": \"wifi_ssid\","
 186         "      \"EAP\": {"
 187         "        \"Outer\": \"EAP-TLS\","
 188         "        \"ClientCertType\": \"Pattern\","
 189         "        \"ClientCertPattern\": {"
 190         "          \"IssuerCAPEMs\": [ \"%s\" ]"
 191         "        }"
 192         "      }"
 193         "    }"
 194         "} ]";
 195     std::string policy_json =
 196         base::StringPrintf(kTestPolicyTemplate, test_ca_cert_pem_.c_str());
 197
 198     std::string error;
 199     scoped_ptr<base::Value> policy_value = base::JSONReader::ReadAndReturnError(
 200         policy_json, base::JSON_ALLOW_TRAILING_COMMAS, NULL, &error);
 201     ASSERT_TRUE(policy_value) << error;
 202
 203     base::ListValue* policy = NULL;
 204     ASSERT_TRUE(policy_value->GetAsList(&policy));
 205
 206     managed_config_handler_->SetPolicy(
 207         onc::ONC_SOURCE_USER_POLICY,
 208         kUserHash,
 209         *policy,
 210         base::DictionaryValue() /* no global network config */);
 211   }
 212
 213   void GetClientCertProperties(std::string* pkcs11_id) {
 214     pkcs11_id->clear();
 215     const base::DictionaryValue* properties =
 216         service_test_->GetServiceProperties(kWifiStub);
 217     if (!properties)
 218       return;
 219     properties->GetStringWithoutPathExpansion(shill::kEapCertIdProperty,
 220                                               pkcs11_id);
 221   }
 222
 223   int network_properties_changed_count_;
 224   std::string test_cert_id_;
 225   scoped_ptr<ClientCertResolver> client_cert_resolver_;
 226
 227  private:
 228   // ClientCertResolver::Observer:
 229   void ResolveRequestCompleted(bool network_properties_changed) override {
 230     if (network_properties_changed)
 231       ++network_properties_changed_count_;
 232   }
 233
 234   ShillServiceClient::TestInterface* service_test_;
 235   ShillProfileClient::TestInterface* profile_test_;
 236   CertLoader* cert_loader_;
 237   scoped_ptr<NetworkStateHandler> network_state_handler_;
 238   scoped_ptr<NetworkProfileHandler> network_profile_handler_;
 239   scoped_ptr<NetworkConfigurationHandler> network_config_handler_;
 240   scoped_ptr<ManagedNetworkConfigurationHandlerImpl> managed_config_handler_;
 241   base::MessageLoop message_loop_;
 242   scoped_refptr<net::X509Certificate> test_client_cert_;
 243   std::string test_ca_cert_pem_;
 244   crypto::ScopedTestNSSDB test_nssdb_;
 245   scoped_ptr<net::NSSCertDatabaseChromeOS> test_nsscertdb_;
 246
 247   DISALLOW_COPY_AND_ASSIGN(ClientCertResolverTest);
 248 };
 249
 250 TEST_F(ClientCertResolverTest, NoMatchingCertificates) {
 251   StartCertLoader();
 252   SetupWifi();
 253   base::RunLoop().RunUntilIdle();
 254   network_properties_changed_count_ = 0;
 255   SetupNetworkHandlers();
 256   SetupPolicy();
 257   base::RunLoop().RunUntilIdle();
 258
 259   // Verify that no client certificate was configured.
 260   std::string pkcs11_id;
 261   GetClientCertProperties(&pkcs11_id);
 262   EXPECT_EQ(std::string(), pkcs11_id);
 263   EXPECT_EQ(1, network_properties_changed_count_);
 264   EXPECT_FALSE(client_cert_resolver_->IsAnyResolveTaskRunning());
 265 }
 266
 267 TEST_F(ClientCertResolverTest, ResolveOnCertificatesLoaded) {
 268   SetupTestCerts();
 269   SetupWifi();
 270   base::RunLoop().RunUntilIdle();
 271
 272   SetupNetworkHandlers();
 273   SetupPolicy();
 274   base::RunLoop().RunUntilIdle();
 275
 276   network_properties_changed_count_ = 0;
 277   StartCertLoader();
 278   base::RunLoop().RunUntilIdle();
 279
 280   // Verify that the resolver positively matched the pattern in the policy with
 281   // the test client cert and configured the network.
 282   std::string pkcs11_id;
 283   GetClientCertProperties(&pkcs11_id);
 284   EXPECT_EQ(test_cert_id_, pkcs11_id);
 285   EXPECT_EQ(1, network_properties_changed_count_);
 286 }
 287
 288 TEST_F(ClientCertResolverTest, ResolveAfterPolicyApplication) {
 289   SetupTestCerts();
 290   SetupWifi();
 291   base::RunLoop().RunUntilIdle();
 292   StartCertLoader();
 293   SetupNetworkHandlers();
 294   base::RunLoop().RunUntilIdle();
 295
 296   // Policy application will trigger the ClientCertResolver.
 297   network_properties_changed_count_ = 0;
 298   SetupPolicy();
 299   base::RunLoop().RunUntilIdle();
 300
 301   // Verify that the resolver positively matched the pattern in the policy with
 302   // the test client cert and configured the network.
 303   std::string pkcs11_id;
 304   GetClientCertProperties(&pkcs11_id);
 305   EXPECT_EQ(test_cert_id_, pkcs11_id);
 306   EXPECT_EQ(1, network_properties_changed_count_);
 307 }
 308
 309 }  // namespace chromeos