Record UMA metrics for Must-Staple certificates on private roots

net/cert/asn1_util.h

 // Copyright (c) 2012 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_ASN1_UTIL_H_
 #define NET_CERT_ASN1_UTIL_H_
 
 #include <vector>
 
 #include "base/strings/string_piece.h"
@@ skipping 25 matching lines @@
 //
 // CRLs that use an alternative issuer are also omitted.
 //
 // The nested set of GeneralNames is flattened into a single list because
 // having several CRLs with one location is equivalent to having one CRL with
 // several locations as far as a CRL filter is concerned.
 NET_EXPORT_PRIVATE bool ExtractCRLURLsFromDERCert(
     base::StringPiece cert,
     std::vector<base::StringPiece>* urls_out);
 
+// HasTLSFeatureExtension parses the DER encoded certificate in |cert|
+// and extracts the TLS feature extension
+// (https://tools.ietf.org/html/rfc7633) if present. Returns true if the
+// TLS feature extension was present, and false if the extension was not
+// present or if there was a parsing failure.
+NET_EXPORT_PRIVATE bool HasTLSFeatureExtension(base::StringPiece cert);
+
 } // namespace asn1
 
 } // namespace net
 
 #endif // NET_CERT_ASN1_UTIL_H_