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Change-Id: I93a35ef554f2f7a235c05d0a2dc171abf58c6caa
diff --git a/src/detail/request-encoder.cpp b/src/detail/request-encoder.cpp
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+++ b/src/detail/request-encoder.cpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2017-2020, Regents of the University of California.
+ *
+ * This file is part of ndncert, a certificate management system based on NDN.
+ *
+ * ndncert is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * ndncert 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 General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License along with
+ * ndncert, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndncert authors and contributors.
+ */
+
+#include "detail/request-encoder.hpp"
+#include <ndn-cxx/security/transform/base64-encode.hpp>
+#include <ndn-cxx/security/transform/buffer-source.hpp>
+#include <ndn-cxx/security/transform/stream-sink.hpp>
+
+namespace ndn {
+namespace ndncert {
+
+Block
+requesttlv::encodeApplicationParameters(RequestType requestType, const std::vector <uint8_t>& ecdhPub,
+                                        const security::Certificate& certRequest)
+{
+  Block
+  request(ndn::tlv::ApplicationParameters);
+  request.push_back(makeBinaryBlock(tlv::EcdhPub, ecdhPub.data(), ecdhPub.size()));
+  if (requestType == RequestType::NEW || requestType == RequestType::RENEW) {
+    request.push_back(makeNestedBlock(tlv::CertRequest, certRequest));
+  }
+  else if (requestType == RequestType::REVOKE) {
+    request.push_back(makeNestedBlock(tlv::CertToRevoke, certRequest));
+  }
+  request.encode();
+  return request;
+}
+
+void
+requesttlv::decodeApplicationParameters(const Block& payload, RequestType requestType,
+                                        std::vector <uint8_t>& ecdhPub,
+                                        shared_ptr <security::Certificate>& clientCert)
+{
+  payload.parse();
+
+  const auto& ecdhBlock = payload.get(tlv::EcdhPub);
+  ecdhPub.resize(ecdhBlock.value_size());
+  std::memcpy(ecdhPub.data(), ecdhBlock.value(), ecdhBlock.value_size());
+
+  Block requestPayload;
+  if (requestType == RequestType::NEW) {
+    requestPayload = payload.get(tlv::CertRequest);
+  }
+  else if (requestType == RequestType::REVOKE) {
+    requestPayload = payload.get(tlv::CertToRevoke);
+  }
+  requestPayload.parse();
+
+  security::Certificate cert = security::Certificate(requestPayload.get(ndn::tlv::Data));
+  clientCert = std::make_shared<security::Certificate>(cert);
+}
+
+Block
+requesttlv::encodeDataContent(const std::vector <uint8_t>& ecdhKey, const std::array<uint8_t, 32>& salt,
+                              const RequestId& requestId,
+                              const std::vector <std::string>& challenges)
+{
+  Block response(ndn::tlv::Content);
+  response.push_back(makeBinaryBlock(tlv::EcdhPub, ecdhKey.data(), ecdhKey.size()));
+  response.push_back(makeBinaryBlock(tlv::Salt, salt.data(), salt.size()));
+  response.push_back(makeBinaryBlock(tlv::RequestId, requestId.data(), requestId.size()));
+  for (const auto& entry: challenges) {
+    response.push_back(makeStringBlock(tlv::Challenge, entry));
+  }
+  response.encode();
+  return response;
+}
+
+std::list <std::string>
+requesttlv::decodeDataContent(const Block& content, std::vector <uint8_t>& ecdhKey,
+                              std::array<uint8_t, 32>& salt, RequestId& requestId)
+{
+  content.parse();
+
+  const auto& ecdhBlock = content.get(tlv::EcdhPub);
+  ecdhKey.resize(ecdhBlock.value_size());
+  std::memcpy(ecdhKey.data(), ecdhBlock.value(), ecdhBlock.value_size());
+
+  const auto& saltBlock = content.get(tlv::Salt);
+  std::memcpy(salt.data(), saltBlock.value(), saltBlock.value_size());
+
+  const auto& requestIdBlock = content.get(tlv::RequestId);
+  std::memcpy(requestId.data(), requestIdBlock.value(), requestIdBlock.value_size());
+
+  std::list <std::string> challenges;
+  for (auto const& element : content.elements()) {
+    if (element.type() == tlv::Challenge) {
+      challenges.push_back(readString(element));
+    }
+  }
+  return challenges;
+}
+
+} // namespace ndncert
+} // namespace ndn
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