Refactor connection_security into SecurityStateModel

chrome/browser/ssl/connection_security.cc

Index: chrome/browser/ssl/connection_security.cc
diff --git a/chrome/browser/ssl/connection_security.cc b/chrome/browser/ssl/connection_security.cc
deleted file mode 100644
index 2851aae0647564f7f2c44d63edbefc268d8cdf01..0000000000000000000000000000000000000000
--- a/chrome/browser/ssl/connection_security.cc
+++ /dev/null
@@ -1,237 +0,0 @@
-// Copyright 2015 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 "chrome/browser/ssl/connection_security.h"
-
-#include "base/command_line.h"
-#include "base/metrics/field_trial.h"
-#include "base/metrics/histogram_macros.h"
-#include "base/prefs/pref_service.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ssl/ssl_error_info.h"
-#include "chrome/common/chrome_constants.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/pref_names.h"
-#include "content/public/browser/cert_store.h"
-#include "content/public/browser/navigation_controller.h"
-#include "content/public/browser/navigation_entry.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/common/origin_util.h"
-#include "content/public/common/ssl_status.h"
-#include "net/base/net_util.h"
-#include "net/cert/cert_status_flags.h"
-#include "net/cert/x509_certificate.h"
-#include "net/ssl/ssl_connection_status_flags.h"
-
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/chromeos/policy/policy_cert_service.h"
-#include "chrome/browser/chromeos/policy/policy_cert_service_factory.h"
-#endif
-
-namespace {
-
-connection_security::SecurityLevel GetSecurityLevelForNonSecureFieldTrial() {
-  std::string choice =
-      base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
-          switches::kMarkNonSecureAs);
-  std::string group = base::FieldTrialList::FindFullName("MarkNonSecureAs");
-
-  // Do not change this enum. It is used in the histogram.
-  enum MarkNonSecureStatus { NEUTRAL, DUBIOUS, NON_SECURE, LAST_STATUS };
-  const char kEnumeration[] = "MarkNonSecureAs";
-
-  connection_security::SecurityLevel level;
-  MarkNonSecureStatus status;
-
-  if (choice == switches::kMarkNonSecureAsNeutral) {
-    status = NEUTRAL;
-    level = connection_security::NONE;
-  } else if (choice == switches::kMarkNonSecureAsNonSecure) {
-    status = NON_SECURE;
-    level = connection_security::SECURITY_ERROR;
-  } else if (group == switches::kMarkNonSecureAsNeutral) {
-    status = NEUTRAL;
-    level = connection_security::NONE;
-  } else if (group == switches::kMarkNonSecureAsNonSecure) {
-    status = NON_SECURE;
-    level = connection_security::SECURITY_ERROR;
-  } else {
-    status = NEUTRAL;
-    level = connection_security::NONE;
-  }
-
-  UMA_HISTOGRAM_ENUMERATION(kEnumeration, status, LAST_STATUS);
-  return level;
-}
-
-scoped_refptr<net::X509Certificate> GetCertForSSLStatus(
-    const content::SSLStatus& ssl) {
-  scoped_refptr<net::X509Certificate> cert;
-  return content::CertStore::GetInstance()->RetrieveCert(ssl.cert_id, &cert)
-             ? cert
-             : nullptr;
-}
-
-connection_security::SHA1DeprecationStatus GetSHA1DeprecationStatus(
-    scoped_refptr<net::X509Certificate> cert,
-    const content::SSLStatus& ssl) {
-  if (!cert || !(ssl.cert_status & net::CERT_STATUS_SHA1_SIGNATURE_PRESENT))
-    return connection_security::NO_DEPRECATED_SHA1;
-
-  // The internal representation of the dates for UI treatment of SHA-1.
-  // See http://crbug.com/401365 for details.
-  static const int64_t kJanuary2017 = INT64_C(13127702400000000);
-  if (cert->valid_expiry() >= base::Time::FromInternalValue(kJanuary2017))
-    return connection_security::DEPRECATED_SHA1_BROKEN;
-  // kJanuary2016 needs to be kept in sync with
-  // ToolbarModelAndroid::IsDeprecatedSHA1Present().
-  static const int64_t kJanuary2016 = INT64_C(13096080000000000);
-  if (cert->valid_expiry() >= base::Time::FromInternalValue(kJanuary2016))
-    return connection_security::DEPRECATED_SHA1_WARNING;
-
-  return connection_security::NO_DEPRECATED_SHA1;
-}
-
-connection_security::MixedContentStatus GetMixedContentStatus(
-    const content::SSLStatus& ssl) {
-  bool ran_insecure_content = false;
-  bool displayed_insecure_content = false;
-  if (ssl.content_status & content::SSLStatus::RAN_INSECURE_CONTENT)
-    ran_insecure_content = true;
-  if (ssl.content_status & content::SSLStatus::DISPLAYED_INSECURE_CONTENT)
-    displayed_insecure_content = true;
-
-  if (ran_insecure_content && displayed_insecure_content)
-    return connection_security::RAN_AND_DISPLAYED_MIXED_CONTENT;
-  if (ran_insecure_content)
-    return connection_security::RAN_MIXED_CONTENT;
-  if (displayed_insecure_content)
-    return connection_security::DISPLAYED_MIXED_CONTENT;
-
-  return connection_security::NO_MIXED_CONTENT;
-}
-
-}  // namespace
-
-namespace connection_security {
-
-SecurityLevel GetSecurityLevelForWebContents(
-    const content::WebContents* web_contents) {
-  if (!web_contents)
-    return NONE;
-
-  content::NavigationEntry* entry =
-      web_contents->GetController().GetVisibleEntry();
-  if (!entry)
-    return NONE;
-
-  const content::SSLStatus& ssl = entry->GetSSL();
-  switch (ssl.security_style) {
-    case content::SECURITY_STYLE_UNKNOWN:
-      return NONE;
-
-    case content::SECURITY_STYLE_UNAUTHENTICATED: {
-      const GURL& url = entry->GetURL();
-      if (!content::IsOriginSecure(url) && url.IsStandard())
-        return GetSecurityLevelForNonSecureFieldTrial();
-      return NONE;
-    }
-
-    case content::SECURITY_STYLE_AUTHENTICATION_BROKEN:
-      return SECURITY_ERROR;
-
-    case content::SECURITY_STYLE_AUTHENTICATED: {
-#if defined(OS_CHROMEOS)
-      // Report if there is a policy cert first, before reporting any other
-      // authenticated-but-with-errors cases. A policy cert is a strong
-      // indicator of a MITM being present (the enterprise), while the
-      // other authenticated-but-with-errors indicate something may
-      // be wrong, or may be wrong in the future, but is unclear now.
-      policy::PolicyCertService* service =
-          policy::PolicyCertServiceFactory::GetForProfile(
-              Profile::FromBrowserContext(web_contents->GetBrowserContext()));
-      if (service && service->UsedPolicyCertificates())
-        return SECURITY_POLICY_WARNING;
-#endif
-
-      scoped_refptr<net::X509Certificate> cert = GetCertForSSLStatus(ssl);
-      SHA1DeprecationStatus sha1_status = GetSHA1DeprecationStatus(cert, ssl);
-      if (sha1_status == DEPRECATED_SHA1_BROKEN)
-        return SECURITY_ERROR;
-      if (sha1_status == DEPRECATED_SHA1_WARNING)
-        return NONE;
-
-      MixedContentStatus mixed_content_status = GetMixedContentStatus(ssl);
-      // Active mixed content is downgraded to the BROKEN style and
-      // handled above.
-      DCHECK_NE(RAN_MIXED_CONTENT, mixed_content_status);
-      DCHECK_NE(RAN_AND_DISPLAYED_MIXED_CONTENT, mixed_content_status);
-      // This should be kept in sync with
-      // |kDisplayedInsecureContentStyle|. That is: the treatment
-      // given to passive mixed content here should be expressed by
-      // |kDisplayedInsecureContentStyle|, which is used to coordinate
-      // the treatment of passive mixed content with other security UI
-      // elements.
-      if (mixed_content_status == DISPLAYED_MIXED_CONTENT)
-        return NONE;
-
-      if (net::IsCertStatusError(ssl.cert_status)) {
-        DCHECK(net::IsCertStatusMinorError(ssl.cert_status));
-        return NONE;
-      }
-      if (net::SSLConnectionStatusToVersion(ssl.connection_status) ==
-          net::SSL_CONNECTION_VERSION_SSL3) {
-        // SSLv3 will be removed in the future.
-        return SECURITY_WARNING;
-      }
-      if ((ssl.cert_status & net::CERT_STATUS_IS_EV) && cert)
-        return EV_SECURE;
-      return SECURE;
-    }
-
-    default:
-      NOTREACHED();
-      return NONE;
-  }
-}
-
-void GetSecurityInfoForWebContents(const content::WebContents* web_contents,
-                                   SecurityInfo* security_info) {
-  content::NavigationEntry* entry =
-      web_contents ? web_contents->GetController().GetVisibleEntry() : nullptr;
-  if (!entry) {
-    security_info->security_style = content::SECURITY_STYLE_UNKNOWN;
-    return;
-  }
-
-  security_info->scheme_is_cryptographic =
-      entry->GetURL().SchemeIsCryptographic();
-
-  SecurityLevel security_level = GetSecurityLevelForWebContents(web_contents);
-  switch (security_level) {
-    case SECURITY_WARNING:
-    case NONE:
-      security_info->security_style = content::SECURITY_STYLE_UNAUTHENTICATED;
-      break;
-    case EV_SECURE:
-    case SECURE:
-      security_info->security_style = content::SECURITY_STYLE_AUTHENTICATED;
-      break;
-    case SECURITY_POLICY_WARNING:
-      security_info->security_style = content::SECURITY_STYLE_WARNING;
-      break;
-    case SECURITY_ERROR:
-      security_info->security_style =
-          content::SECURITY_STYLE_AUTHENTICATION_BROKEN;
-      break;
-  }
-
-  const content::SSLStatus& ssl = entry->GetSSL();
-  scoped_refptr<net::X509Certificate> cert = GetCertForSSLStatus(ssl);
-  security_info->sha1_deprecation_status = GetSHA1DeprecationStatus(cert, ssl);
-  security_info->mixed_content_status = GetMixedContentStatus(ssl);
-  security_info->cert_status = ssl.cert_status;
-}
-
-}  // namespace connection_security