security: Abstract certificate fetching from v2::Validator
Change-Id: Ia98d11ac67b0095f632818ac37a19a1e5a7656a8
Refs: #3921
diff --git a/src/security/v2/certificate-fetcher-offline.cpp b/src/security/v2/certificate-fetcher-offline.cpp
new file mode 100644
index 0000000..8bf28e1
--- /dev/null
+++ b/src/security/v2/certificate-fetcher-offline.cpp
@@ -0,0 +1,39 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2017 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "certificate-fetcher-offline.hpp"
+
+namespace ndn {
+namespace security {
+namespace v2 {
+
+void
+CertificateFetcherOffline::doFetch(const shared_ptr<CertificateRequest>& certRequest,
+ const shared_ptr<ValidationState>& state,
+ const ValidationContinuation& continueValidation)
+{
+ state->fail({ValidationError::Code::CANNOT_RETRIEVE_CERT,
+ "Cannot fetch certificate " + certRequest->m_interest.getName().toUri() + " in offline mode"});
+}
+
+} // namespace v2
+} // namespace security
+} // namespace ndn