Certificate Transparency: Require SCTs for EV certificates.

net/cert/cert_policy_enforcer.h

+// 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.
+#ifndef NET_CERT_CERT_POLICY_ENFORCER_H
+#define NET_CERT_CERT_POLICY_ENFORCER_H
+
+#include <stddef.h>
+
+#include "net/base/net_export.h"
+
+namespace net {
+
+namespace ct {
+
+struct CTVerifyResult;
+class EVCertsWhitelist;
+
+}  // namespace ct
+
+class X509Certificate;
+
+// Class for checking that a given certificate conforms to security-related
+// policies.
+class NET_EXPORT CertPolicyEnforcer {
+ public:
+  // Set the parameters for this policy enforcer:
+  // |num_ct_logs| is the number of Certificate Transparency log currently
+  // known to Chrome.
+  // |require_ct_for_ev| indicates whether Certificate Transparency presence
+  // is required for EV certificates.
+  CertPolicyEnforcer(size_t num_ct_logs, bool require_ct_for_ev);
+  virtual ~CertPolicyEnforcer();
+
+  // Returns true if the collection of SCTs for the given certificate
+  // conforms with the CT/EV policy.
+  // |cert| is the certificate for which the SCTs apply.
+  // |ct_result| must contain the result of verifying any SCTs associated with
+  // |cert| prior to invoking this method.
+  bool DoesConformToCTEVPolicy(X509Certificate* cert,
+                               const ct::EVCertsWhitelist* ev_whitelist,
+                               const ct::CTVerifyResult& ct_result);
+
+ private:
+  bool IsCertificateInWhitelist(X509Certificate* cert,
+                                const ct::EVCertsWhitelist* ev_whitelist);
+
+  bool HasRequiredNumberOfSCTs(X509Certificate* cert,
+                               const ct::CTVerifyResult& ct_result);
+
+  size_t num_ct_logs_;
+  bool require_ct_for_ev_;
+};
+
+}  // namespace net
+
+#endif  // NET_CERT_CERT_POLICY_ENFORCER_H