Use user specific NSSDatabase in CertLoader.

chromeos/cert_loader_unittest.cc

+// Copyright 2014 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 "chromeos/cert_loader.h"
+
+#include "base/bind.h"
+#include "base/file_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "crypto/nss_util.h"
+#include "crypto/nss_util_internal.h"
+#include "net/base/net_errors.h"
+#include "net/base/test_data_directory.h"
+#include "net/cert/nss_cert_database_chromeos.h"
+#include "net/cert/x509_certificate.h"
+#include "net/test/cert_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+namespace {
+
+bool IsCertInCertificateList(const net::X509Certificate* cert,
+                             const net::CertificateList& cert_list) {
+  for (net::CertificateList::const_iterator it = cert_list.begin();
+       it != cert_list.end();
+       ++it) {
+    if (net::X509Certificate::IsSameOSCert((*it)->os_cert_handle(),
+                                            cert->os_cert_handle())) {
+      return true;
+    }
+  }
+  return false;
+}
+
+void FailOnPrivateSlotCallback(crypto::ScopedPK11Slot slot) {
+  EXPECT_FALSE(true) << "GetPrivateSlotForChromeOSUser callback called even "
+                     << "though the private slot had been initialized.";
+}
+
+class CertLoaderTest : public testing::Test,
+                       public CertLoader::Observer {
+ public:
+  CertLoaderTest() : cert_loader_(NULL),
+                     primary_user_("primary"),
+                     certificates_loaded_events_count_(0U) {
+  }
+
+  virtual ~CertLoaderTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    ASSERT_TRUE(primary_user_.constructed_successfully());
+    ASSERT_TRUE(
+        crypto::GetPublicSlotForChromeOSUser(primary_user_.username_hash()));
+
+    CertLoader::Initialize();
+    cert_loader_ = CertLoader::Get();
+    cert_loader_->AddObserver(this);
+    cert_loader_->SetSlowTaskRunnerForTest(message_loop_.message_loop_proxy());
+  }
+
+  virtual void TearDown() {
+    cert_loader_->RemoveObserver(this);
+    CertLoader::Shutdown();
+  }
+
+ protected:
+  void StartCertLoaderWithPrimaryUser() {
+    FinishUserInitAndGetDatabase(&primary_user_, &primary_db_);
+    cert_loader_->StartWithNSSDB(primary_db_.get());
+
+    base::RunLoop().RunUntilIdle();
+    GetAndResetCertificatesLoadedEventsCount();
+  }
+
+  // CertLoader::Observer:
+  // The test keeps count of times the observer method was called.
+  virtual void OnCertificatesLoaded(const net::CertificateList& cert_list,
+                                    bool initial_load) OVERRIDE {
+    EXPECT_TRUE(certificates_loaded_events_count_ == 0 || !initial_load);
+    certificates_loaded_events_count_++;
+  }
+
+  // Returns the number of |OnCertificatesLoaded| calls observed since the
+  // last call to this method equals |value|.
+  size_t GetAndResetCertificatesLoadedEventsCount() {
+    size_t result = certificates_loaded_events_count_;
+    certificates_loaded_events_count_ = 0;
+    return result;
+  }
+
+  // Finishes initialization for the |user| and returns a user's NSS database
+  // instance.
+  void FinishUserInitAndGetDatabase(
+      crypto::ScopedTestNSSChromeOSUser* user,
+      scoped_ptr<net::NSSCertDatabaseChromeOS>* database) {
+    ASSERT_TRUE(user->constructed_successfully());
+
+    user->FinishInit();
+
+    crypto::ScopedPK11Slot private_slot(
+        crypto::GetPrivateSlotForChromeOSUser(
+            user->username_hash(),
+            base::Bind(&FailOnPrivateSlotCallback)));
+    ASSERT_TRUE(private_slot);
+
+    database->reset(new net::NSSCertDatabaseChromeOS(
+        crypto::GetPublicSlotForChromeOSUser(user->username_hash()),
+        private_slot.Pass()));
+  }
+
+  int GetDbPrivateSlotId(net::NSSCertDatabase* db) {
+    return static_cast<int>(PK11_GetSlotID(db->GetPrivateSlot().get()));
+  }
+
+  void ImportCACert(const std::string& cert_file,
+                    net::NSSCertDatabase* database,
+                    net::CertificateList* imported_certs) {
+    ASSERT_TRUE(database);
+    ASSERT_TRUE(imported_certs);
+
+    // Add a certificate to the user's db.
+    *imported_certs = net::CreateCertificateListFromFile(
+        net::GetTestCertsDirectory(),
+        cert_file,
+        net::X509Certificate::FORMAT_AUTO);
+    ASSERT_EQ(1U, imported_certs->size());
+
+    net::NSSCertDatabase::ImportCertFailureList failed;
+    ASSERT_TRUE(database->ImportCACerts(*imported_certs,
+                                        net::NSSCertDatabase::TRUST_DEFAULT,
+                                        &failed));
+    ASSERT_TRUE(failed.empty());
+  }
+
+  void ImportClientCertAndKey(const std::string& pkcs12_file,
+                              net::NSSCertDatabase* database,
+                              net::CertificateList* imported_certs) {
+    ASSERT_TRUE(database);
+    ASSERT_TRUE(imported_certs);
+
+    std::string pkcs12_data;
+    base::FilePath pkcs12_file_path =
+        net::GetTestCertsDirectory().Append(pkcs12_file);
+    ASSERT_TRUE(base::ReadFileToString(pkcs12_file_path, &pkcs12_data));
+
+    net::CertificateList client_cert_list;
+    scoped_refptr<net::CryptoModule> module(net::CryptoModule::CreateFromHandle(
+        database->GetPrivateSlot().get()));
+    ASSERT_EQ(
+        net::OK,
+        database->ImportFromPKCS12(module, pkcs12_data, base::string16(), false,
+                                   imported_certs));
+    ASSERT_EQ(1U, imported_certs->size());
+  }
+
+  CertLoader* cert_loader_;
+
+  // The user is primary as the one whose certificates CertLoader handles, it
+  // has nothing to do with crypto::InitializeNSSForChromeOSUser is_primary_user
+  // parameter (which is irrelevant for these tests).
+  crypto::ScopedTestNSSChromeOSUser primary_user_;
+  scoped_ptr<net::NSSCertDatabaseChromeOS> primary_db_;
+
+  base::MessageLoop message_loop_;
+
+ private:
+  size_t certificates_loaded_events_count_;
+};
+
+TEST_F(CertLoaderTest, Basic) {
+  EXPECT_FALSE(cert_loader_->CertificatesLoading());
+  EXPECT_FALSE(cert_loader_->certificates_loaded());
+  EXPECT_FALSE(cert_loader_->IsHardwareBacked());
+
+  FinishUserInitAndGetDatabase(&primary_user_, &primary_db_);
+
+  cert_loader_->StartWithNSSDB(primary_db_.get());
+
+  EXPECT_FALSE(cert_loader_->certificates_loaded());
+  EXPECT_TRUE(cert_loader_->CertificatesLoading());
+  EXPECT_TRUE(cert_loader_->cert_list().empty());
+
+  ASSERT_EQ(0U, GetAndResetCertificatesLoadedEventsCount());
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(1U, GetAndResetCertificatesLoadedEventsCount());
+
+  EXPECT_TRUE(cert_loader_->certificates_loaded());
+  EXPECT_FALSE(cert_loader_->CertificatesLoading());
+  EXPECT_EQ(GetDbPrivateSlotId(primary_db_.get()),
+            cert_loader_->TPMTokenSlotID());
+
+  // Default CA cert roots should get loaded.
+  EXPECT_FALSE(cert_loader_->cert_list().empty());
+}
+
+TEST_F(CertLoaderTest, CertLoaderUpdatesCertListOnNewCert) {
+  StartCertLoaderWithPrimaryUser();
+
+  net::CertificateList certs;
+  ImportCACert("root_ca_cert.pem", primary_db_.get(), &certs);
+
+  // Certs are loaded asynchronously, so the new cert should not yet be in the
+  // cert list.
+  EXPECT_FALSE(IsCertInCertificateList(certs[0], cert_loader_->cert_list()));
+
+  ASSERT_EQ(0U, GetAndResetCertificatesLoadedEventsCount());
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(1U, GetAndResetCertificatesLoadedEventsCount());
+
+  // The certificate list should be updated now, as the message loop's been run.
+  EXPECT_TRUE(IsCertInCertificateList(certs[0], cert_loader_->cert_list()));
+}
+
+TEST_F(CertLoaderTest, CertLoaderNoUpdateOnSecondaryDbChanges) {
+  crypto::ScopedTestNSSChromeOSUser secondary_user("secondary");
+  scoped_ptr<net::NSSCertDatabaseChromeOS> secondary_db;
+
+  StartCertLoaderWithPrimaryUser();
+  FinishUserInitAndGetDatabase(&secondary_user, &secondary_db);
+
+  net::CertificateList certs;
+  ImportCACert("root_ca_cert.pem", secondary_db.get(), &certs);
+
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_FALSE(IsCertInCertificateList(certs[0], cert_loader_->cert_list()));
+}
+
+TEST_F(CertLoaderTest, ClientLoaderUpdateOnNewClientCert) {
+  StartCertLoaderWithPrimaryUser();
+
+  net::CertificateList certs;
+  ImportClientCertAndKey("websocket_client_cert.p12",
+                         primary_db_.get(),
+                         &certs);
+
+  ASSERT_EQ(0U, GetAndResetCertificatesLoadedEventsCount());
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(1U, GetAndResetCertificatesLoadedEventsCount());
+
+  EXPECT_TRUE(IsCertInCertificateList(certs[0], cert_loader_->cert_list()));
+}
+
+TEST_F(CertLoaderTest, CertLoaderNoUpdateOnNewClientCertInSecondaryDb) {
+  crypto::ScopedTestNSSChromeOSUser secondary_user("secondary");
+  scoped_ptr<net::NSSCertDatabaseChromeOS> secondary_db;
+
+  StartCertLoaderWithPrimaryUser();
+  FinishUserInitAndGetDatabase(&secondary_user, &secondary_db);
+
+  net::CertificateList certs;
+  ImportClientCertAndKey("websocket_client_cert.p12",
+                         secondary_db.get(),
+                         &certs);
+
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_FALSE(IsCertInCertificateList(certs[0], cert_loader_->cert_list()));
+}
+
+TEST_F(CertLoaderTest, UpdatedOnCertRemoval) {
+  StartCertLoaderWithPrimaryUser();
+
+  net::CertificateList certs;
+  ImportClientCertAndKey("websocket_client_cert.p12",
+                         primary_db_.get(),
+                         &certs);
+
+  base::RunLoop().RunUntilIdle();
+
+  ASSERT_EQ(1U, GetAndResetCertificatesLoadedEventsCount());
+  ASSERT_TRUE(IsCertInCertificateList(certs[0], cert_loader_->cert_list()));
+
+  primary_db_->DeleteCertAndKey(certs[0]);
+
+  ASSERT_EQ(0U, GetAndResetCertificatesLoadedEventsCount());
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(1U, GetAndResetCertificatesLoadedEventsCount());
+
+  ASSERT_FALSE(IsCertInCertificateList(certs[0], cert_loader_->cert_list()));
+}
+
+TEST_F(CertLoaderTest, UpdatedOnCACertTrustChange) {
+  StartCertLoaderWithPrimaryUser();
+
+  net::CertificateList certs;
+  ImportCACert("root_ca_cert.pem", primary_db_.get(), &certs);
+
+  base::RunLoop().RunUntilIdle();
+  ASSERT_EQ(1U, GetAndResetCertificatesLoadedEventsCount());
+  ASSERT_TRUE(IsCertInCertificateList(certs[0], cert_loader_->cert_list()));
+
+  // The value that should have been set by |ImportCACert|.
+  ASSERT_EQ(net::NSSCertDatabase::TRUST_DEFAULT,
+            primary_db_->GetCertTrust(certs[0], net::CA_CERT));
+  ASSERT_TRUE(primary_db_->SetCertTrust(
+      certs[0], net::CA_CERT, net::NSSCertDatabase::TRUSTED_SSL));
+
+  // Cert trust change should trigger certificate reload in cert_loader_.
+  ASSERT_EQ(0U, GetAndResetCertificatesLoadedEventsCount());
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(1U, GetAndResetCertificatesLoadedEventsCount());
+}
+
+}  // namespace
+}  // namespace chromeos