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// 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::kMarkNonSecureAsDubious) {
status = DUBIOUS;
level = connection_security::SECURITY_WARNING;
} 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::kMarkNonSecureAsDubious) {
status = DUBIOUS;
level = connection_security::SECURITY_WARNING;
} 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) {
if (ssl.content_status & content::SSLStatus::RAN_INSECURE_CONTENT)
return connection_security::RAN_MIXED_CONTENT;
if (ssl.content_status & content::SSLStatus::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))
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 SECURITY_WARNING;
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);
if (mixed_content_status == DISPLAYED_MIXED_CONTENT)
return SECURITY_WARNING;
if (net::IsCertStatusError(ssl.cert_status)) {
DCHECK(net::IsCertStatusMinorError(ssl.cert_status));
return SECURITY_WARNING;
}
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;
}
SecurityLevel security_level = GetSecurityLevelForWebContents(web_contents);
switch (security_level) {
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_WARNING:
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
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