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diff --git a/security/certverifier/CTObjectsExtractor.h b/security/certverifier/CTObjectsExtractor.h
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+++ b/security/certverifier/CTObjectsExtractor.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 CTObjectsExtractor_h
+#define CTObjectsExtractor_h
+
+#include "pkix/Input.h"
+#include "pkix/Result.h"
+#include "SignedCertificateTimestamp.h"
+
+namespace mozilla { namespace ct {
+
+// Obtains a PrecertChain log entry for |leafCertificate|, a DER-encoded
+// X.509v3 certificate that contains an X.509v3 extension with the
+// OID 1.3.6.1.4.1.11129.2.4.2.
+// |issuerSubjectPublicKeyInfo| is a DER-encoded SPKI of |leafCertificate|'s
+// issuer.
+// On success, fills |output| with the data for a PrecertChain log entry.
+// If |leafCertificate| does not contain the required extension,
+// an error is returned.
+// The returned |output| is intended to be verified by CTLogVerifier::Verify.
+// Note that |leafCertificate| is not checked for validity or well-formedness.
+// You might want to validate it first using pkix::BuildCertChain or similar.
+pkix::Result GetPrecertLogEntry(pkix::Input leafCertificate,
+                                pkix::Input issuerSubjectPublicKeyInfo,
+                                LogEntry& output);
+
+// Obtains an X509Chain log entry for |leafCertificate|, a DER-encoded
+// X.509v3 certificate that is not expected to contain an X.509v3 extension
+// with the OID 1.3.6.1.4.1.11129.2.4.2 (meaning a certificate without
+// an embedded SCT).
+// On success, fills |output| with the data for an X509Chain log entry.
+// The returned |output| is intended to be verified by CTLogVerifier::Verify.
+// Note that |leafCertificate| is not checked for validity or well-formedness.
+// You might want to validate it first using pkix::BuildCertChain or similar.
+pkix::Result GetX509LogEntry(pkix::Input leafCertificate, LogEntry& output);
+
+} } // namespace mozilla::ct
+
+#endif  // CTObjectsExtractor_h