Remember user decisions on invalid certificates behind a flag

chrome/browser/ssl/chrome_ssl_host_state_decisions_test.cc

+// Copyright (c) 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 <stdint.h>
+
+#include "base/command_line.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/test/simple_test_clock.h"
+#include "chrome/browser/browsing_data/browsing_data_helper.h"
+#include "chrome/browser/browsing_data/browsing_data_remover.h"
+#include "chrome/browser/browsing_data/browsing_data_remover_test_util.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ssl/chrome_ssl_host_state_decisions.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "content/public/browser/ssl_host_state_decisions.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/test/browser_test_utils.h"
+#include "net/base/test_data_directory.h"
+#include "net/test/cert_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+namespace {
+
+const char kGoogleCertFile[] = "google.single.der";
+
+const char kWWWGoogleURL[] = "https://www.google.com";
+const char kGoogleURL[] = "https://google.com";
+const char kExampleURL[] = "https://example.com";
+
+const char* kForgetAtSessionEnd = "-1";
+const char* kForgetInstantly = "0";
+const char* kDeltaSecondsString = "86400";
+const uint64_t kDeltaOneDayInSeconds = UINT64_C(86400);
+
+scoped_refptr<net::X509Certificate> GetGoogleCert() {
+  return net::ImportCertFromFile(net::GetTestCertsDirectory(), kGoogleCertFile);
+}
+
+}  // namespace
+
+class ChromeSSLHostStateDecisionsTest : public InProcessBrowserTest {};
+
+// ChromeSSLHostStateDecisionsTest tests basic unit test functionality of the
+// SSLHostStateDecisions class.  For example, tests that if a certificate is
+// accepted, then it is added to queryable, and if it is revoked, it is not
+// queryable. Even though it is effectively a unit test, in needs to be an
+// InProcessBrowserTest because the actual functionality is provided by
+// ChromeSSLHostStateDecisions which is provided per-profile.
+//
+// QueryPolicy unit tests the expected behavior of calling QueryPolicy on the
+// SSLHostStateDecisions class after various SSL cert decisions have been made.
+IN_PROC_BROWSER_TEST_F(ChromeSSLHostStateDecisionsTest, QueryPolicy) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  GURL google_gurl(kGoogleURL);
+  GURL example_gurl(kExampleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  // Verifying that all three of the certs we will be looking at are unknown
+  // before any action has been taken.
+  EXPECT_EQ(
+      net::CertPolicy::UNKNOWN,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+  EXPECT_EQ(net::CertPolicy::UNKNOWN,
+            state->QueryPolicy(
+                google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+  EXPECT_EQ(
+      net::CertPolicy::UNKNOWN,
+      state->QueryPolicy(
+          example_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+
+  // Simulate a user decision to allow an invalid certificate exception for
+  // www_google_gurl.
+  state->AllowCert(
+      www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+
+  // Verify that only www_google_gurl is allowed and that the other two certs
+  // being tested still have no decision associated with them.
+  EXPECT_EQ(
+      net::CertPolicy::ALLOWED,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+  EXPECT_EQ(net::CertPolicy::UNKNOWN,
+            state->QueryPolicy(
+                google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+  EXPECT_EQ(
+      net::CertPolicy::UNKNOWN,
+      state->QueryPolicy(
+          example_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+
+  // Simulate a user decision to allow an invalid certificate exception for
+  // example_gurl.
+  state->AllowCert(
+      example_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+
+  // Verify that both www_google_gurl and example_gurl have allow exceptions
+  // while google_gurl still has no associated decision.
+  EXPECT_EQ(
+      net::CertPolicy::ALLOWED,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+  EXPECT_EQ(net::CertPolicy::UNKNOWN,
+            state->QueryPolicy(
+                google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+  EXPECT_EQ(
+      net::CertPolicy::ALLOWED,
+      state->QueryPolicy(
+          example_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+
+  // Simulate a user decision to deny an invalid certificate for example_gurl.
+  state->DenyCert(
+      example_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+
+  // Verify that www_google_gurl is allowed and example_gurl is denied while
+  // google_gurl still has no associated decision.
+  EXPECT_EQ(
+      net::CertPolicy::ALLOWED,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+  EXPECT_EQ(net::CertPolicy::UNKNOWN,
+            state->QueryPolicy(
+                google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+  EXPECT_EQ(
+      net::CertPolicy::DENIED,
+      state->QueryPolicy(
+          example_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+}
+
+// HasPolicyAndRevoke unit tests the expected behavior of calling
+// HasAllowedOrDeniedCert before and after calling RevokeAllowAndDenyPreferences
+// on the SSLHostStateDecisions class.
+IN_PROC_BROWSER_TEST_F(ChromeSSLHostStateDecisionsTest, HasPolicyAndRevoke) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  GURL google_gurl(kGoogleURL);
+  GURL example_gurl(kExampleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  // Simulate a user decision to allow an invalid certificate exception for
+  // www_google_gurl and for example_gurl.
+  state->AllowCert(
+      www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+  state->AllowCert(
+      example_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+
+  // Verify that HasAllowedOrDeniedCert correctly acknowledges that a user
+  // decision has been made about www_google_gurl. Then verify that
+  // HasAllowedOrDeniedCert correctly identifies that the decision has been
+  // revoked.
+  EXPECT_TRUE(state->HasAllowedOrDeniedCert(www_google_gurl));
+  state->RevokeAllowAndDenyPreferences(www_google_gurl);
+  EXPECT_FALSE(state->HasAllowedOrDeniedCert(www_google_gurl));
+  EXPECT_EQ(
+      net::CertPolicy::UNKNOWN,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+
+  // Verify that the revocation of the www_google_gurl decision does not affect
+  // the Allow for example_gurl.
+  EXPECT_TRUE(state->HasAllowedOrDeniedCert(example_gurl));
+
+  // Verify the revocation of the www_google_gurl decision does not affect the
+  // non-decision for google_gurl. Then verify that a revocation of a URL with
+  // no decision has no effect.
+  EXPECT_FALSE(state->HasAllowedOrDeniedCert(google_gurl));
+  state->RevokeAllowAndDenyPreferences(google_gurl);
+  EXPECT_FALSE(state->HasAllowedOrDeniedCert(google_gurl));
+}
+
+// Clear unit tests the expected behavior of calling Clear to forget all cert
+// decision state on the SSLHostStateDecisions class.
+IN_PROC_BROWSER_TEST_F(ChromeSSLHostStateDecisionsTest, Clear) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  GURL example_gurl(kExampleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  // Simulate a user decision to allow an invalid certificate exception for
+  // www_google_gurl and for example_gurl.
+  state->AllowCert(
+      www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+
+  // Do a full clear, then make sure that both www_google_gurl, which had a
+  // decision made, and example_gurl, which was untouched, are now in a
+  // non-decision state.
+  state->Clear();
+  EXPECT_FALSE(state->HasAllowedOrDeniedCert(www_google_gurl));
+  EXPECT_EQ(
+      net::CertPolicy::UNKNOWN,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+  EXPECT_FALSE(state->HasAllowedOrDeniedCert(example_gurl));
+  EXPECT_EQ(
+      net::CertPolicy::UNKNOWN,
+      state->QueryPolicy(
+          example_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+}
+
+// Tests the basic behavior of cert memory in incognito.
+class IncognitoSSLHostStateDecisionsTest
+    : public ChromeSSLHostStateDecisionsTest {
+ protected:
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    ChromeSSLHostStateDecisionsTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitchASCII(switches::kRememberCertErrorDecisions,
+                                    kDeltaSecondsString);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(IncognitoSSLHostStateDecisionsTest, PRE_AfterRestart) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  GURL google_gurl(kGoogleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  // Add a cert exception to the profile and then verify that it still exists
+  // in the incognito profile.
+  state->AllowCert(
+      www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+
+  scoped_ptr<Profile> incognito(profile->CreateOffTheRecordProfile());
+  content::SSLHostStateDecisions* incognito_state =
+      incognito->GetSSLHostStateDecisions();
+
+  EXPECT_EQ(
+      net::CertPolicy::ALLOWED,
+      incognito_state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+
+  // Add a cert exception to the incognito profile. It will be checked after
+  // restart that this exception does not exist. Note the different cert URL and
+  // error than above thus mapping to a second exception. Also validate that it
+  // was not added as an exception to the regular profile.
+  incognito_state->AllowCert(
+      google_gurl, google_cert.get(), net::CERT_STATUS_COMMON_NAME_INVALID);
+
+  EXPECT_EQ(net::CertPolicy::UNKNOWN,
+            state->QueryPolicy(google_gurl,
+                               google_cert.get(),
+                               net::CERT_STATUS_COMMON_NAME_INVALID));
+}
+
+// AfterRestart ensures that any cert decisions made in an incognito profile are
+// forgetten after a session restart even if given a command line flag to
+// remember cert decisions after restart.
+IN_PROC_BROWSER_TEST_F(IncognitoSSLHostStateDecisionsTest, AfterRestart) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  GURL google_gurl(kGoogleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  // Verify that the exception added before restart to the regular
+  // (non-incognito) profile still exists and was not cleared after the
+  // incognito session ended.
+  EXPECT_EQ(
+      net::CertPolicy::ALLOWED,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+
+  scoped_ptr<Profile> incognito(profile->CreateOffTheRecordProfile());
+  content::SSLHostStateDecisions* incognito_state =
+      incognito->GetSSLHostStateDecisions();
+
+  // Verify that the exception added before restart to the incognito profile was
+  // cleared when the incognito session ended.
+  EXPECT_EQ(net::CertPolicy::UNKNOWN,
+            incognito_state->QueryPolicy(google_gurl,
+                                         google_cert.get(),
+                                         net::CERT_STATUS_COMMON_NAME_INVALID));
+}
+
+// Tests to make sure that if the remember value is set to -1, any decisions
+// won't be remembered over a restart.
+class ForgetSSLHostStateDecisionsTest : public ChromeSSLHostStateDecisionsTest {
+ protected:
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    ChromeSSLHostStateDecisionsTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitchASCII(switches::kRememberCertErrorDecisions,
+                                    kForgetAtSessionEnd);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(ForgetSSLHostStateDecisionsTest, PRE_AfterRestart) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  state->AllowCert(
+      www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+  EXPECT_EQ(
+      net::CertPolicy::ALLOWED,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+}
+
+IN_PROC_BROWSER_TEST_F(ForgetSSLHostStateDecisionsTest, AfterRestart) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  // The cert should now be |UNKONWN| because the profile is set to forget cert
+  // exceptions after session end.
+  EXPECT_EQ(
+      net::CertPolicy::UNKNOWN,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+}
+
+// Tests to make sure that if the remember value is set to 0, any decisions made
+// will be forgetten immediately.
+class ForgetInstantlySSLHostStateDecisionsTest
+    : public ChromeSSLHostStateDecisionsTest {
+ protected:
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    ChromeSSLHostStateDecisionsTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitchASCII(switches::kRememberCertErrorDecisions,
+                                    kForgetInstantly);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(ForgetInstantlySSLHostStateDecisionsTest,
+                       MakeAndForgetException) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  // chrome_state takes ownership of this clock
+  base::SimpleTestClock* clock = new base::SimpleTestClock();
+  ChromeSSLHostStateDecisions* chrome_state =
+      static_cast<ChromeSSLHostStateDecisions*>(state);
+  chrome_state->SetClock(scoped_ptr<base::Clock>(clock));
+
+  // Start the clock at standard system time but do not advance at all to
+  // emphasize that instant forget works.
+  clock->SetNow(base::Time::NowFromSystemTime());
+
+  state->AllowCert(
+      www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+  EXPECT_EQ(
+      net::CertPolicy::UNKNOWN,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+}
+
+// Tests to make sure that if the remember value is set to a non-zero value0,
+// any decisions will be remembered over a restart, but only for the length
+// specified.
+class RememberSSLHostStateDecisionsTest
+    : public ChromeSSLHostStateDecisionsTest {
+ protected:
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    ChromeSSLHostStateDecisionsTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitchASCII(switches::kRememberCertErrorDecisions,
+                                    kDeltaSecondsString);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(RememberSSLHostStateDecisionsTest, PRE_AfterRestart) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  state->AllowCert(
+      www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+  EXPECT_EQ(
+      net::CertPolicy::ALLOWED,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+}
+
+IN_PROC_BROWSER_TEST_F(RememberSSLHostStateDecisionsTest, AfterRestart) {
+  GURL www_google_gurl(kWWWGoogleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  // chrome_state takes ownership of this clock
+  base::SimpleTestClock* clock = new base::SimpleTestClock();
+  ChromeSSLHostStateDecisions* chrome_state =
+      static_cast<ChromeSSLHostStateDecisions*>(state);
+  chrome_state->SetClock(scoped_ptr<base::Clock>(clock));
+
+  // Start the clock at standard system time.
+  clock->SetNow(base::Time::NowFromSystemTime());
+
+  // This should only pass if the cert was allowed before the test was restart
+  // and thus has now been rememebered across browser restarts.
+  EXPECT_EQ(
+      net::CertPolicy::ALLOWED,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+
+  // Simulate the clock advancing by the specified delta.
+  clock->Advance(base::TimeDelta::FromSeconds(kDeltaOneDayInSeconds + 1));
+
+  // The cert should now be |UNKONWN| because the specified delta has passed.
+  EXPECT_EQ(
+      net::CertPolicy::UNKNOWN,
+      state->QueryPolicy(
+          www_google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+}
+
+// Tests to make sure that if the user deletes their browser history, SSL
+// exceptions will be deleted as well.
+class RemoveBrowsingHistorySSLHostStateDecisionsTest
+    : public ChromeSSLHostStateDecisionsTest {
+ public:
+  void RemoveAndWait(Profile* profile) {
+    BrowsingDataRemover* remover = BrowsingDataRemover::CreateForPeriod(
+        profile, BrowsingDataRemover::LAST_HOUR);
+    BrowsingDataRemoverCompletionObserver completion_observer(remover);
+    remover->Remove(BrowsingDataRemover::REMOVE_HISTORY,
+                    BrowsingDataHelper::UNPROTECTED_WEB);
+    completion_observer.BlockUntilCompletion();
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(RemoveBrowsingHistorySSLHostStateDecisionsTest,
+                       DeleteHistory) {
+  GURL google_gurl(kGoogleURL);
+  scoped_refptr<net::X509Certificate> google_cert = GetGoogleCert();
+  content::WebContents* tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  Profile* profile = Profile::FromBrowserContext(tab->GetBrowserContext());
+  content::SSLHostStateDecisions* state = profile->GetSSLHostStateDecisions();
+
+  // Add an exception for an invalid certificate. Then remove the last hour's
+  // worth of browsing history and verify that the exception has been deleted.
+  state->AllowCert(
+      google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID);
+  RemoveAndWait(profile);
+  EXPECT_EQ(net::CertPolicy::UNKNOWN,
+            state->QueryPolicy(
+                google_gurl, google_cert.get(), net::CERT_STATUS_DATE_INVALID));
+}