| Index: net/cert/cert_policy_enforcer.cc
|
| diff --git a/net/cert/cert_policy_enforcer.cc b/net/cert/cert_policy_enforcer.cc
|
| deleted file mode 100644
|
| index 25e9325fd4309f954bb171c2c05d648897ad94c0..0000000000000000000000000000000000000000
|
| --- a/net/cert/cert_policy_enforcer.cc
|
| +++ /dev/null
|
| @@ -1,255 +0,0 @@
|
| -// 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 "net/cert/cert_policy_enforcer.h"
|
| -
|
| -#include <algorithm>
|
| -
|
| -#include "base/bind.h"
|
| -#include "base/build_time.h"
|
| -#include "base/callback_helpers.h"
|
| -#include "base/metrics/field_trial.h"
|
| -#include "base/metrics/histogram.h"
|
| -#include "base/numerics/safe_conversions.h"
|
| -#include "base/strings/string_number_conversions.h"
|
| -#include "base/values.h"
|
| -#include "base/version.h"
|
| -#include "net/base/net_log.h"
|
| -#include "net/cert/ct_ev_whitelist.h"
|
| -#include "net/cert/ct_verify_result.h"
|
| -#include "net/cert/signed_certificate_timestamp.h"
|
| -#include "net/cert/x509_certificate.h"
|
| -#include "net/cert/x509_certificate_net_log_param.h"
|
| -
|
| -namespace net {
|
| -
|
| -namespace {
|
| -
|
| -bool IsEmbeddedSCT(const scoped_refptr<ct::SignedCertificateTimestamp>& sct) {
|
| - return sct->origin == ct::SignedCertificateTimestamp::SCT_EMBEDDED;
|
| -}
|
| -
|
| -// Returns true if the current build is recent enough to ensure that
|
| -// built-in security information (e.g. CT Logs) is fresh enough.
|
| -// TODO(eranm): Move to base or net/base
|
| -bool IsBuildTimely() {
|
| -#if defined(DONT_EMBED_BUILD_METADATA) && !defined(OFFICIAL_BUILD)
|
| - return true;
|
| -#else
|
| - const base::Time build_time = base::GetBuildTime();
|
| - // We consider built-in information to be timely for 10 weeks.
|
| - return (base::Time::Now() - build_time).InDays() < 70 /* 10 weeks */;
|
| -#endif
|
| -}
|
| -
|
| -uint32_t ApproximateMonthDifference(const base::Time& start,
|
| - const base::Time& end) {
|
| - base::Time::Exploded exploded_start;
|
| - base::Time::Exploded exploded_expiry;
|
| - start.UTCExplode(&exploded_start);
|
| - end.UTCExplode(&exploded_expiry);
|
| - uint32_t month_diff = (exploded_expiry.year - exploded_start.year) * 12 +
|
| - (exploded_expiry.month - exploded_start.month);
|
| -
|
| - // Add any remainder as a full month.
|
| - if (exploded_expiry.day_of_month > exploded_start.day_of_month)
|
| - ++month_diff;
|
| -
|
| - return month_diff;
|
| -}
|
| -
|
| -bool HasRequiredNumberOfSCTs(const X509Certificate& cert,
|
| - const ct::CTVerifyResult& ct_result) {
|
| - // TODO(eranm): Count the number of *independent* SCTs once the information
|
| - // about log operators is available, crbug.com/425174
|
| - size_t num_valid_scts = ct_result.verified_scts.size();
|
| - size_t num_embedded_scts =
|
| - std::count_if(ct_result.verified_scts.begin(),
|
| - ct_result.verified_scts.end(), IsEmbeddedSCT);
|
| -
|
| - size_t num_non_embedded_scts = num_valid_scts - num_embedded_scts;
|
| - // If at least two valid SCTs were delivered by means other than embedding
|
| - // (i.e. in a TLS extension or OCSP), then the certificate conforms to bullet
|
| - // number 3 of the "Qualifying Certificate" section of the CT/EV policy.
|
| - if (num_non_embedded_scts >= 2)
|
| - return true;
|
| -
|
| - if (cert.valid_start().is_null() || cert.valid_expiry().is_null() ||
|
| - cert.valid_start().is_max() || cert.valid_expiry().is_max()) {
|
| - // Will not be able to calculate the certificate's validity period.
|
| - return false;
|
| - }
|
| -
|
| - uint32_t expiry_in_months_approx =
|
| - ApproximateMonthDifference(cert.valid_start(), cert.valid_expiry());
|
| -
|
| - // For embedded SCTs, if the certificate has the number of SCTs specified in
|
| - // table 1 of the "Qualifying Certificate" section of the CT/EV policy, then
|
| - // it qualifies.
|
| - size_t num_required_embedded_scts;
|
| - if (expiry_in_months_approx > 39) {
|
| - num_required_embedded_scts = 5;
|
| - } else if (expiry_in_months_approx > 27) {
|
| - num_required_embedded_scts = 4;
|
| - } else if (expiry_in_months_approx >= 15) {
|
| - num_required_embedded_scts = 3;
|
| - } else {
|
| - num_required_embedded_scts = 2;
|
| - }
|
| -
|
| - return num_embedded_scts >= num_required_embedded_scts;
|
| -}
|
| -
|
| -enum CTComplianceStatus {
|
| - CT_NOT_COMPLIANT = 0,
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| - CT_IN_WHITELIST = 1,
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| - CT_ENOUGH_SCTS = 2,
|
| - CT_COMPLIANCE_MAX,
|
| -};
|
| -
|
| -const char* ComplianceStatusToString(CTComplianceStatus status) {
|
| - switch (status) {
|
| - case CT_NOT_COMPLIANT:
|
| - return "NOT_COMPLIANT";
|
| - break;
|
| - case CT_IN_WHITELIST:
|
| - return "WHITELISTED";
|
| - break;
|
| - case CT_ENOUGH_SCTS:
|
| - return "ENOUGH_SCTS";
|
| - break;
|
| - case CT_COMPLIANCE_MAX:
|
| - break;
|
| - }
|
| -
|
| - return "unknown";
|
| -}
|
| -
|
| -void LogCTComplianceStatusToUMA(CTComplianceStatus status) {
|
| - UMA_HISTOGRAM_ENUMERATION("Net.SSL_EVCertificateCTCompliance", status,
|
| - CT_COMPLIANCE_MAX);
|
| -}
|
| -
|
| -struct ComplianceDetails {
|
| - ComplianceDetails()
|
| - : ct_presence_required(false),
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| - build_timely(false),
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| - status(CT_NOT_COMPLIANT) {}
|
| -
|
| - // Whether enforcement of the policy was required or not.
|
| - bool ct_presence_required;
|
| - // Whether the build is not older than 10 weeks. The value is meaningful only
|
| - // if |ct_presence_required| is true.
|
| - bool build_timely;
|
| - // Compliance status - meaningful only if |ct_presence_required| and
|
| - // |build_timely| are true.
|
| - CTComplianceStatus status;
|
| - // EV whitelist version.
|
| - base::Version whitelist_version;
|
| -};
|
| -
|
| -base::Value* NetLogComplianceCheckResultCallback(X509Certificate* cert,
|
| - ComplianceDetails* details,
|
| - NetLog::LogLevel log_level) {
|
| - base::DictionaryValue* dict = new base::DictionaryValue();
|
| - dict->Set("certificate", NetLogX509CertificateCallback(cert, log_level));
|
| - dict->SetBoolean("policy_enforcement_required",
|
| - details->ct_presence_required);
|
| - if (details->ct_presence_required) {
|
| - dict->SetBoolean("build_timely", details->build_timely);
|
| - if (details->build_timely) {
|
| - dict->SetString("ct_compliance_status",
|
| - ComplianceStatusToString(details->status));
|
| - if (details->whitelist_version.IsValid())
|
| - dict->SetString("ev_whitelist_version",
|
| - details->whitelist_version.GetString());
|
| - }
|
| - }
|
| - return dict;
|
| -}
|
| -
|
| -bool IsCertificateInWhitelist(const X509Certificate& cert,
|
| - const ct::EVCertsWhitelist* ev_whitelist) {
|
| - bool cert_in_ev_whitelist = false;
|
| - if (ev_whitelist && ev_whitelist->IsValid()) {
|
| - const SHA256HashValue fingerprint(
|
| - X509Certificate::CalculateFingerprint256(cert.os_cert_handle()));
|
| -
|
| - std::string truncated_fp =
|
| - std::string(reinterpret_cast<const char*>(fingerprint.data), 8);
|
| - cert_in_ev_whitelist = ev_whitelist->ContainsCertificateHash(truncated_fp);
|
| -
|
| - UMA_HISTOGRAM_BOOLEAN("Net.SSL_EVCertificateInWhitelist",
|
| - cert_in_ev_whitelist);
|
| - }
|
| - return cert_in_ev_whitelist;
|
| -}
|
| -
|
| -void CheckCTEVPolicyCompliance(X509Certificate* cert,
|
| - const ct::EVCertsWhitelist* ev_whitelist,
|
| - const ct::CTVerifyResult& ct_result,
|
| - ComplianceDetails* result) {
|
| - result->ct_presence_required = true;
|
| -
|
| - if (!IsBuildTimely())
|
| - return;
|
| - result->build_timely = true;
|
| -
|
| - if (ev_whitelist && ev_whitelist->IsValid())
|
| - result->whitelist_version = ev_whitelist->Version();
|
| -
|
| - if (IsCertificateInWhitelist(*cert, ev_whitelist)) {
|
| - result->status = CT_IN_WHITELIST;
|
| - return;
|
| - }
|
| -
|
| - if (HasRequiredNumberOfSCTs(*cert, ct_result)) {
|
| - result->status = CT_ENOUGH_SCTS;
|
| - return;
|
| - }
|
| -
|
| - result->status = CT_NOT_COMPLIANT;
|
| -}
|
| -
|
| -} // namespace
|
| -
|
| -CertPolicyEnforcer::CertPolicyEnforcer(bool require_ct_for_ev)
|
| - : require_ct_for_ev_(require_ct_for_ev) {
|
| -}
|
| -
|
| -CertPolicyEnforcer::~CertPolicyEnforcer() {
|
| -}
|
| -
|
| -bool CertPolicyEnforcer::DoesConformToCTEVPolicy(
|
| - X509Certificate* cert,
|
| - const ct::EVCertsWhitelist* ev_whitelist,
|
| - const ct::CTVerifyResult& ct_result,
|
| - const BoundNetLog& net_log) {
|
| - ComplianceDetails details;
|
| -
|
| - if (require_ct_for_ev_)
|
| - CheckCTEVPolicyCompliance(cert, ev_whitelist, ct_result, &details);
|
| -
|
| - NetLog::ParametersCallback net_log_callback =
|
| - base::Bind(&NetLogComplianceCheckResultCallback, base::Unretained(cert),
|
| - base::Unretained(&details));
|
| -
|
| - net_log.AddEvent(NetLog::TYPE_EV_CERT_CT_COMPLIANCE_CHECKED,
|
| - net_log_callback);
|
| -
|
| - if (!details.ct_presence_required)
|
| - return true;
|
| -
|
| - if (!details.build_timely)
|
| - return false;
|
| -
|
| - LogCTComplianceStatusToUMA(details.status);
|
| -
|
| - if (details.status == CT_IN_WHITELIST || details.status == CT_ENOUGH_SCTS)
|
| - return true;
|
| -
|
| - return false;
|
| -}
|
| -
|
| -} // namespace net
|
|
|