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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ssl/chrome_security_state_tab_helper.h"
#include <string>
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/metrics/field_trial_params.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/pattern.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/lookalikes/safety_tip_web_contents_observer.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ssl/https_only_mode_tab_helper.h"
#include "chrome/browser/ssl/known_interception_disclosure_infobar_delegate.h"
#include "chrome/common/chrome_features.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/secure_origin_allowlist.h"
#include "components/autofill/core/common/autofill_features.h"
#include "components/omnibox/browser/omnibox_field_trial.h"
#include "components/omnibox/common/omnibox_features.h"
#include "components/password_manager/core/browser/password_manager_metrics_util.h"
#include "components/prefs/pref_service.h"
#include "components/safe_browsing/buildflags.h"
#include "components/safe_browsing/content/browser/ui_manager.h"
#include "components/security_interstitials/core/pref_names.h"
#include "components/security_state/content/content_utils.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/ssl_status.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/origin_util.h"
#include "net/base/net_errors.h"
#include "net/cert/x509_certificate.h"
#include "net/ssl/ssl_cipher_suite_names.h"
#include "net/ssl/ssl_connection_status_flags.h"
#include "services/metrics/public/cpp/ukm_builders.h"
#include "services/metrics/public/cpp/ukm_recorder.h"
#include "services/network/public/cpp/is_potentially_trustworthy.h"
#include "third_party/boringssl/src/include/openssl/ssl.h"
#include "url/gurl.h"
#include "url/origin.h"
#if BUILDFLAG(FULL_SAFE_BROWSING)
#include "chrome/browser/safe_browsing/chrome_password_protection_service.h"
#endif
#if BUILDFLAG(SAFE_BROWSING_AVAILABLE)
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
#endif
using password_manager::metrics_util::PasswordType;
using safe_browsing::SafeBrowsingUIManager;
using UsesEmbedderInformation = SecurityStateTabHelper::UsesEmbedderInformation;
void ChromeSecurityStateTabHelper::CreateForWebContents(
content::WebContents* contents) {
DCHECK(contents);
SecurityStateTabHelper* helper = FromWebContents(contents);
if (!helper) {
helper = new ChromeSecurityStateTabHelper(contents);
contents->SetUserData(UserDataKey(), base::WrapUnique(helper));
}
CHECK(helper->uses_embedder_information())
<< "Do not create a SecurityStateTabHelper in chrome/!";
}
ChromeSecurityStateTabHelper::ChromeSecurityStateTabHelper(
content::WebContents* web_contents)
: SecurityStateTabHelper(web_contents, UsesEmbedderInformation(true)),
content::WebContentsObserver(web_contents) {}
ChromeSecurityStateTabHelper::~ChromeSecurityStateTabHelper() = default;
std::unique_ptr<security_state::VisibleSecurityState>
ChromeSecurityStateTabHelper::GetVisibleSecurityState() {
auto state = SecurityStateTabHelper::GetVisibleSecurityState();
// Malware status might already be known even if connection security
// information is still being initialized, thus no need to check for that.
state->malicious_content_status = GetMaliciousContentStatus();
SafetyTipWebContentsObserver* safety_tip_web_contents_observer =
SafetyTipWebContentsObserver::FromWebContents(web_contents());
state->safety_tip_info =
safety_tip_web_contents_observer
? safety_tip_web_contents_observer
->GetSafetyTipInfoForVisibleNavigation()
: security_state::SafetyTipInfo(
{security_state::SafetyTipStatus::kUnknown, GURL()});
// If both the mixed form warnings are not disabled by policy we don't degrade
// the lock icon for sites with mixed forms present.
Profile* profile =
Profile::FromBrowserContext(web_contents()->GetBrowserContext());
if (profile &&
profile->GetPrefs()->GetBoolean(prefs::kMixedFormsWarningsEnabled)) {
state->should_treat_displayed_mixed_forms_as_secure = true;
}
// TODO(crbug.com/40248833): Track upgrade/fallback state per-navigation.
// Currently HTTPS Upgrades state is tracked via a TabHelper attached to the
// current WebContents (i.e., per tab), which can cause this state to "leak"
// across multiple different navigations, potentially causing the wrong
// security state to be computed.
auto* https_only_mode_tab_helper =
HttpsOnlyModeTabHelper::FromWebContents(web_contents());
if (https_only_mode_tab_helper &&
(https_only_mode_tab_helper->is_navigation_upgraded() ||
https_only_mode_tab_helper->is_navigation_fallback())) {
state->is_https_only_mode_upgraded = true;
}
return state;
}
void ChromeSecurityStateTabHelper::DidStartNavigation(
content::NavigationHandle* navigation_handle) {
if (!navigation_handle->IsFormSubmission()) {
return;
}
UMA_HISTOGRAM_ENUMERATION("Security.SecurityLevel.FormSubmission",
GetSecurityLevel(),
security_state::SECURITY_LEVEL_COUNT);
if (navigation_handle->IsInMainFrame() &&
!security_state::IsSchemeCryptographic(GetVisibleSecurityState()->url)) {
UMA_HISTOGRAM_ENUMERATION(
"Security.SecurityLevel.InsecureMainFrameFormSubmission",
GetSecurityLevel(), security_state::SECURITY_LEVEL_COUNT);
}
if (navigation_handle->GetURL().SchemeIs(url::kHttpsScheme)) {
ukm::UkmRecorder* ukm_recorder = ukm::UkmRecorder::Get();
CHECK(ukm_recorder);
ukm::SourceId source_id = ukm::ConvertToSourceId(
navigation_handle->GetNavigationId(), ukm::SourceIdType::NAVIGATION_ID);
ukm::builders::OmniboxSecurityIndicator_FormSubmission(source_id)
.SetSubmitted(true)
.Record(ukm_recorder);
}
}
void ChromeSecurityStateTabHelper::PrimaryPageChanged(content::Page& page) {
net::CertStatus cert_status = GetVisibleSecurityState()->cert_status;
if (net::IsCertStatusError(cert_status) &&
!page.GetMainDocument().IsErrorDocument()) {
// Record each time a user visits a site after having clicked through a
// certificate warning interstitial. This is used as a baseline for
// interstitial.ssl.did_user_revoke_decision2 in order to determine how
// many times the re-enable warnings button is clicked, as a fraction of
// the number of times it was available.
UMA_HISTOGRAM_BOOLEAN("interstitial.ssl.visited_site_after_warning", true);
}
MaybeShowKnownInterceptionDisclosureDialog(web_contents(), cert_status);
}
security_state::MaliciousContentStatus
ChromeSecurityStateTabHelper::GetMaliciousContentStatus() const {
#if BUILDFLAG(SAFE_BROWSING_AVAILABLE)
using enum safe_browsing::SBThreatType;
content::NavigationEntry* entry =
web_contents()->GetController().GetVisibleEntry();
if (!entry) {
return security_state::MALICIOUS_CONTENT_STATUS_NONE;
}
safe_browsing::SafeBrowsingService* sb_service =
g_browser_process->safe_browsing_service();
if (!sb_service) {
return security_state::MALICIOUS_CONTENT_STATUS_NONE;
}
scoped_refptr<SafeBrowsingUIManager> sb_ui_manager = sb_service->ui_manager();
safe_browsing::SBThreatType threat_type;
if (sb_ui_manager->IsUrlAllowlistedOrPendingForWebContents(
entry->GetURL(), entry, web_contents(), false, &threat_type)) {
switch (threat_type) {
case SB_THREAT_TYPE_UNUSED:
case SB_THREAT_TYPE_SAFE:
case SB_THREAT_TYPE_URL_PHISHING:
case SB_THREAT_TYPE_URL_CLIENT_SIDE_PHISHING:
return security_state::MALICIOUS_CONTENT_STATUS_SOCIAL_ENGINEERING;
case SB_THREAT_TYPE_URL_MALWARE:
return security_state::MALICIOUS_CONTENT_STATUS_MALWARE;
case SB_THREAT_TYPE_URL_UNWANTED:
return security_state::MALICIOUS_CONTENT_STATUS_UNWANTED_SOFTWARE;
case SB_THREAT_TYPE_SAVED_PASSWORD_REUSE:
#if BUILDFLAG(FULL_SAFE_BROWSING)
return security_state::MALICIOUS_CONTENT_STATUS_SAVED_PASSWORD_REUSE;
#endif
case SB_THREAT_TYPE_SIGNED_IN_SYNC_PASSWORD_REUSE:
#if BUILDFLAG(FULL_SAFE_BROWSING)
if (safe_browsing::ChromePasswordProtectionService::
ShouldShowPasswordReusePageInfoBubble(
web_contents(), PasswordType::PRIMARY_ACCOUNT_PASSWORD)) {
return security_state::
MALICIOUS_CONTENT_STATUS_SIGNED_IN_SYNC_PASSWORD_REUSE;
}
#endif
[[fallthrough]];
case SB_THREAT_TYPE_SIGNED_IN_NON_SYNC_PASSWORD_REUSE:
#if BUILDFLAG(FULL_SAFE_BROWSING)
if (safe_browsing::ChromePasswordProtectionService::
ShouldShowPasswordReusePageInfoBubble(
web_contents(), PasswordType::OTHER_GAIA_PASSWORD)) {
return security_state::
MALICIOUS_CONTENT_STATUS_SIGNED_IN_NON_SYNC_PASSWORD_REUSE;
}
#endif
[[fallthrough]];
case SB_THREAT_TYPE_ENTERPRISE_PASSWORD_REUSE:
#if BUILDFLAG(FULL_SAFE_BROWSING)
if (safe_browsing::ChromePasswordProtectionService::
ShouldShowPasswordReusePageInfoBubble(
web_contents(), PasswordType::ENTERPRISE_PASSWORD)) {
return security_state::
MALICIOUS_CONTENT_STATUS_ENTERPRISE_PASSWORD_REUSE;
}
#endif
// If user has already changed password or FULL_SAFE_BROWSING isn't
// enabled, returns the regular social engineering content status.
return security_state::MALICIOUS_CONTENT_STATUS_SOCIAL_ENGINEERING;
case SB_THREAT_TYPE_BILLING:
return security_state::MALICIOUS_CONTENT_STATUS_BILLING;
case SB_THREAT_TYPE_MANAGED_POLICY_BLOCK:
return security_state::MALICIOUS_CONTENT_STATUS_MANAGED_POLICY_BLOCK;
case SB_THREAT_TYPE_MANAGED_POLICY_WARN:
return security_state::MALICIOUS_CONTENT_STATUS_MANAGED_POLICY_WARN;
case DEPRECATED_SB_THREAT_TYPE_URL_PASSWORD_PROTECTION_PHISHING:
case DEPRECATED_SB_THREAT_TYPE_URL_CLIENT_SIDE_MALWARE:
case SB_THREAT_TYPE_URL_BINARY_MALWARE:
case SB_THREAT_TYPE_EXTENSION:
case SB_THREAT_TYPE_API_ABUSE:
case SB_THREAT_TYPE_SUBRESOURCE_FILTER:
case SB_THREAT_TYPE_CSD_ALLOWLIST:
case SB_THREAT_TYPE_AD_SAMPLE:
case SB_THREAT_TYPE_BLOCKED_AD_POPUP:
case SB_THREAT_TYPE_BLOCKED_AD_REDIRECT:
case SB_THREAT_TYPE_SUSPICIOUS_SITE:
case SB_THREAT_TYPE_APK_DOWNLOAD:
case SB_THREAT_TYPE_HIGH_CONFIDENCE_ALLOWLIST:
// These threat types are not currently associated with
// interstitials, and thus resources with these threat types are
// not ever whitelisted or pending whitelisting.
NOTREACHED();
}
}
#endif // BUILDFLAG(SAFE_BROWSING_AVAILABLE)
return security_state::MALICIOUS_CONTENT_STATUS_NONE;
}
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