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diff --git a/security/certverifier/BRNameMatchingPolicy.h b/security/certverifier/BRNameMatchingPolicy.h
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+++ b/security/certverifier/BRNameMatchingPolicy.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef BRNameMatchingPolicy_h
+#define BRNameMatchingPolicy_h
+
+#include "pkix/pkixtypes.h"
+
+namespace mozilla { namespace psm {
+
+// According to the Baseline Requirements version 1.3.3 section 7.1.4.2.2.a,
+// the requirements of the subject common name field are as follows:
+// "If present, this field MUST contain a single IP address or Fully‐Qualified
+// Domain Name that is one of the values contained in the Certificate’s
+// subjectAltName extension". Consequently, since any name information present
+// in the common name must be present in the subject alternative name extension,
+// when performing name matching, it should not be necessary to fall back to the
+// common name. Because this consequence has not commonly been enforced, this
+// implementation provides a mechanism to start enforcing it gradually while
+// maintaining some backwards compatibility. If configured with the mode
+// "EnforceAfter23August2016", name matching will only fall back to using the
+// subject common name for certificates where the notBefore field is before 23
+// August 2016. Similarly, the mode "EnforceAfter23August2015" is also
+// available. This is to provide a balance between allowing preexisting
+// long-lived certificates and detecting newly-issued problematic certificates.
+// Note that this implementation does not actually directly enforce that if the
+// subject common name is present, its value corresponds to a dNSName or
+// iPAddress entry in the subject alternative name extension.
+
+class BRNameMatchingPolicy : public mozilla::pkix::NameMatchingPolicy
+{
+public:
+  enum class Mode {
+    DoNotEnforce = 0,
+    EnforceAfter23August2016 = 1,
+    EnforceAfter23August2015 = 2,
+    Enforce = 3,
+  };
+
+  explicit BRNameMatchingPolicy(Mode mode)
+    : mMode(mode)
+  {
+  }
+
+  virtual mozilla::pkix::Result FallBackToCommonName(
+    mozilla::pkix::Time notBefore,
+    /*out*/ mozilla::pkix::FallBackToSearchWithinSubject& fallBacktoCommonName)
+    override;
+
+private:
+  Mode mMode;
+};
+
+} } // namespace mozilla::psm
+
+#endif // BRNameMatchingPolicy_h