src/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/file_util.h"
  10 #include "base/files/file_path.h"
  11 #include "base/json/json_reader.h"
  12 #include "base/run_loop.h"
  13 #include "base/strings/stringprintf.h"
  14 #include "base/values.h"
  15 #include "chromeos/dbus/dbus_thread_manager.h"
  16 #include "chromeos/dbus/shill_profile_client.h"
  17 #include "chromeos/dbus/shill_service_client.h"
  18 #include "chromeos/login/login_state.h"
  19 #include "chromeos/network/managed_network_configuration_handler_impl.h"
  20 #include "chromeos/network/network_configuration_handler.h"
  21 #include "chromeos/network/network_profile_handler.h"
  22 #include "chromeos/network/network_state_handler.h"
  23 #include "crypto/nss_util.h"
  24 #include "net/base/crypto_module.h"
  25 #include "net/base/net_errors.h"
  26 #include "net/base/test_data_directory.h"
  27 #include "net/cert/nss_cert_database.h"
  28 #include "net/cert/x509_certificate.h"
  29 #include "net/test/cert_test_util.h"
  30 #include "testing/gtest/include/gtest/gtest.h"
  31 #include "third_party/cros_system_api/dbus/service_constants.h"
  32
  33 namespace chromeos {
  34
  35 namespace {
  36
  37 const char* kWifiStub = "wifi_stub";
  38 const char* kWifiSSID = "wifi_ssid";
  39 const char* kUserProfilePath = "user_profile";
  40 const char* kUserHash = "user_hash";
  41
  42 }  // namespace
  43
  44 class ClientCertResolverTest : public testing::Test {
  45  public:
  46   ClientCertResolverTest() {}
  47   virtual ~ClientCertResolverTest() {}
  48
  49   virtual void SetUp() OVERRIDE {
  50     ASSERT_TRUE(test_nssdb_.is_open());
  51     slot_ = net::NSSCertDatabase::GetInstance()->GetPublicModule();
  52     ASSERT_TRUE(slot_->os_module_handle());
  53
  54     LoginState::Initialize();
  55
  56     DBusThreadManager::InitializeWithStub();
  57     service_test_ =
  58         DBusThreadManager::Get()->GetShillServiceClient()->GetTestInterface();
  59     profile_test_ =
  60         DBusThreadManager::Get()->GetShillProfileClient()->GetTestInterface();
  61     message_loop_.RunUntilIdle();
  62     service_test_->ClearServices();
  63     message_loop_.RunUntilIdle();
  64
  65     CertLoader::Initialize();
  66     CertLoader* cert_loader = CertLoader::Get();
  67     cert_loader->InitializeTPMForTest();
  68     cert_loader->SetSlowTaskRunnerForTest(message_loop_.message_loop_proxy());
  69     cert_loader->SetCryptoTaskRunner(message_loop_.message_loop_proxy());
  70   }
  71
  72   virtual void TearDown() OVERRIDE {
  73     client_cert_resolver_.reset();
  74     managed_config_handler_.reset();
  75     network_config_handler_.reset();
  76     network_profile_handler_.reset();
  77     network_state_handler_.reset();
  78     CertLoader::Shutdown();
  79     DBusThreadManager::Shutdown();
  80     LoginState::Shutdown();
  81     CleanupSlotContents();
  82   }
  83
  84  protected:
  85   // Imports a CA cert (stored as PEM in test_ca_cert_pem_) and a client
  86   // certificate signed by that CA. Its PKCS#11 ID is stored in
  87   // |test_pkcs11_id_|.
  88   void SetupTestCerts() {
  89     // Import a CA cert.
  90     net::NSSCertDatabase* cert_db = net::NSSCertDatabase::GetInstance();
  91     net::CertificateList ca_cert_list =
  92         net::CreateCertificateListFromFile(net::GetTestCertsDirectory(),
  93                                            "websocket_cacert.pem",
  94                                            net::X509Certificate::FORMAT_AUTO);
  95     ASSERT_TRUE(!ca_cert_list.empty());
  96     net::NSSCertDatabase::ImportCertFailureList failures;
  97     EXPECT_TRUE(cert_db->ImportCACerts(
  98         ca_cert_list, net::NSSCertDatabase::TRUST_DEFAULT, &failures));
  99     ASSERT_TRUE(failures.empty()) << net::ErrorToString(failures[0].net_error);
 100
 101     net::X509Certificate::GetPEMEncoded(ca_cert_list[0]->os_cert_handle(),
 102                                         &test_ca_cert_pem_);
 103     ASSERT_TRUE(!test_ca_cert_pem_.empty());
 104
 105     // Import a client cert signed by that CA.
 106     scoped_refptr<net::CryptoModule> crypt_module = cert_db->GetPrivateModule();
 107     std::string pkcs12_data;
 108     ASSERT_TRUE(base::ReadFileToString(
 109         net::GetTestCertsDirectory().Append("websocket_client_cert.p12"),
 110         &pkcs12_data));
 111
 112     net::CertificateList client_cert_list;
 113     ASSERT_EQ(net::OK,
 114               cert_db->ImportFromPKCS12(crypt_module.get(),
 115                                         pkcs12_data,
 116                                         string16(),
 117                                         false,
 118                                         &client_cert_list));
 119     ASSERT_TRUE(!client_cert_list.empty());
 120     test_pkcs11_id_ = CertLoader::GetPkcs11IdForCert(*client_cert_list[0]);
 121     ASSERT_TRUE(!test_pkcs11_id_.empty());
 122   }
 123
 124   void SetupNetworkHandlers() {
 125     network_state_handler_.reset(NetworkStateHandler::InitializeForTest());
 126     network_profile_handler_.reset(new NetworkProfileHandler());
 127     network_config_handler_.reset(new NetworkConfigurationHandler());
 128     managed_config_handler_.reset(new ManagedNetworkConfigurationHandlerImpl());
 129     client_cert_resolver_.reset(new ClientCertResolver());
 130
 131     network_profile_handler_->Init(network_state_handler_.get());
 132     network_config_handler_->Init(network_state_handler_.get());
 133     managed_config_handler_->Init(network_state_handler_.get(),
 134                                   network_profile_handler_.get(),
 135                                   network_config_handler_.get());
 136     client_cert_resolver_->Init(network_state_handler_.get(),
 137                                 managed_config_handler_.get());
 138     client_cert_resolver_->SetSlowTaskRunnerForTest(
 139         message_loop_.message_loop_proxy());
 140
 141     profile_test_->AddProfile(kUserProfilePath, kUserHash);
 142   }
 143
 144   void SetupWifi() {
 145     const bool add_to_visible = true;
 146     const bool add_to_watchlist = true;
 147     service_test_->AddService(kWifiStub,
 148                               kWifiSSID,
 149                               shill::kTypeWifi,
 150                               shill::kStateOnline,
 151                               add_to_visible,
 152                               add_to_watchlist);
 153     service_test_->SetServiceProperty(
 154         kWifiStub, shill::kGuidProperty, base::StringValue(kWifiStub));
 155
 156     profile_test_->AddService(kUserProfilePath, kWifiStub);
 157   }
 158
 159   // Setup a policy with a certificate pattern that matches any client cert that
 160   // is signed by the test CA cert (stored in |test_ca_cert_pem_|). In
 161   // particular it will match the test client cert.
 162   void SetupPolicy() {
 163     const char* kTestPolicyTemplate =
 164         "[ { \"GUID\": \"wifi_stub\","
 165         "    \"Name\": \"wifi_stub\","
 166         "    \"Type\": \"WiFi\","
 167         "    \"WiFi\": {"
 168         "      \"Security\": \"WPA-EAP\","
 169         "      \"SSID\": \"wifi_ssid\","
 170         "      \"EAP\": {"
 171         "        \"Outer\": \"EAP-TLS\","
 172         "        \"ClientCertType\": \"Pattern\","
 173         "        \"ClientCertPattern\": {"
 174         "          \"IssuerCAPEMs\": [ \"%s\" ]"
 175         "        }"
 176         "      }"
 177         "    }"
 178         "} ]";
 179     std::string policy_json =
 180         base::StringPrintf(kTestPolicyTemplate, test_ca_cert_pem_.c_str());
 181
 182     std::string error;
 183     scoped_ptr<base::Value> policy_value(base::JSONReader::ReadAndReturnError(
 184         policy_json, base::JSON_ALLOW_TRAILING_COMMAS, NULL, &error));
 185     ASSERT_TRUE(policy_value) << error;
 186
 187     base::ListValue* policy = NULL;
 188     ASSERT_TRUE(policy_value->GetAsList(&policy));
 189
 190     managed_config_handler_->SetPolicy(
 191         onc::ONC_SOURCE_USER_POLICY,
 192         kUserHash,
 193         *policy,
 194         base::DictionaryValue() /* no global network config */);
 195   }
 196
 197   void GetClientCertProperties(std::string* pkcs11_id) {
 198     pkcs11_id->clear();
 199     const base::DictionaryValue* properties =
 200         service_test_->GetServiceProperties(kWifiStub);
 201     if (!properties)
 202       return;
 203     properties->GetStringWithoutPathExpansion(shill::kEapCertIdProperty,
 204                                               pkcs11_id);
 205   }
 206
 207   ShillServiceClient::TestInterface* service_test_;
 208   ShillProfileClient::TestInterface* profile_test_;
 209   std::string test_pkcs11_id_;
 210   scoped_refptr<net::X509Certificate> test_ca_cert_;
 211   std::string test_ca_cert_pem_;
 212   base::MessageLoop message_loop_;
 213
 214  private:
 215   void CleanupSlotContents() {
 216     CERTCertList* cert_list = PK11_ListCertsInSlot(slot_->os_module_handle());
 217     for (CERTCertListNode* node = CERT_LIST_HEAD(cert_list);
 218          !CERT_LIST_END(node, cert_list);
 219          node = CERT_LIST_NEXT(node)) {
 220       scoped_refptr<net::X509Certificate> cert(
 221           net::X509Certificate::CreateFromHandle(
 222               node->cert, net::X509Certificate::OSCertHandles()));
 223       net::NSSCertDatabase::GetInstance()->DeleteCertAndKey(cert.get());
 224     }
 225     CERT_DestroyCertList(cert_list);
 226   }
 227
 228   scoped_ptr<NetworkStateHandler> network_state_handler_;
 229   scoped_ptr<NetworkProfileHandler> network_profile_handler_;
 230   scoped_ptr<NetworkConfigurationHandler> network_config_handler_;
 231   scoped_ptr<ManagedNetworkConfigurationHandlerImpl> managed_config_handler_;
 232   scoped_ptr<ClientCertResolver> client_cert_resolver_;
 233   scoped_refptr<net::CryptoModule> slot_;
 234   crypto::ScopedTestNSSDB test_nssdb_;
 235
 236   DISALLOW_COPY_AND_ASSIGN(ClientCertResolverTest);
 237 };
 238
 239 TEST_F(ClientCertResolverTest, NoMatchingCertificates) {
 240   SetupNetworkHandlers();
 241   SetupPolicy();
 242   message_loop_.RunUntilIdle();
 243
 244   SetupWifi();
 245   message_loop_.RunUntilIdle();
 246
 247   // Verify that no client certificate was configured.
 248   std::string pkcs11_id;
 249   GetClientCertProperties(&pkcs11_id);
 250   EXPECT_TRUE(pkcs11_id.empty());
 251 }
 252
 253 TEST_F(ClientCertResolverTest, ResolveOnInitialization) {
 254   SetupTestCerts();
 255   SetupNetworkHandlers();
 256   SetupPolicy();
 257   message_loop_.RunUntilIdle();
 258
 259   SetupWifi();
 260   message_loop_.RunUntilIdle();
 261
 262   // Verify that the resolver positively matched the pattern in the policy with
 263   // the test client cert and configured the network.
 264   std::string pkcs11_id;
 265   GetClientCertProperties(&pkcs11_id);
 266   EXPECT_EQ(test_pkcs11_id_, pkcs11_id);
 267 }
 268
 269 TEST_F(ClientCertResolverTest, ResolveAfterPolicyApplication) {
 270   SetupTestCerts();
 271   SetupNetworkHandlers();
 272   message_loop_.RunUntilIdle();
 273
 274   // The policy will trigger the creation of a new wifi service.
 275   SetupPolicy();
 276   message_loop_.RunUntilIdle();
 277
 278   // Verify that the resolver positively matched the pattern in the policy with
 279   // the test client cert and configured the network.
 280   std::string pkcs11_id;
 281   GetClientCertProperties(&pkcs11_id);
 282   EXPECT_EQ(test_pkcs11_id_, pkcs11_id);
 283 }
 284
 285 }  // namespace chromeos