split configuration into pieces

Change-Id: I3039a3e15d9637e05b0f9678a7141258fb49e983
diff --git a/src/detail/ca-configuration.hpp b/src/detail/ca-configuration.hpp
new file mode 100644
index 0000000..da170b9
--- /dev/null
+++ b/src/detail/ca-configuration.hpp
@@ -0,0 +1,79 @@
+/* -*- 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.
+ */
+
+#ifndef NDNCERT_DETAIL_CA_CONFIGURATION_HPP
+#define NDNCERT_DETAIL_CA_CONFIGURATION_HPP
+
+#include "detail/ca-profile.hpp"
+
+namespace ndn {
+namespace ndncert {
+namespace ca {
+
+/**
+ * @brief CA's configuration on NDNCERT.
+ * @sa https://github.com/named-data/ndncert/wiki/NDNCERT-Protocol-0.3
+ *
+ * The format of CA configuration in JSON
+ * {
+ *  "ca-prefix": "",
+ *  "ca-info": "",
+ *  "max-validity-period": "",
+ *  "max-suffix-length": "",
+ *  "probe-parameters":
+ *  [
+ *    {"probe-parameter-key": ""},
+ *    {"probe-parameter-key": ""}
+ *  ]
+ *  "supported-challenges":
+ *  [
+ *    {"challenge": ""},
+ *    {"challenge": ""}
+ *  ]
+ * }
+ */
+class CaConfig
+{
+public:
+  /**
+   * Load CA configuration from the file.
+   * @throw std::runtime_error when config file cannot be correctly parsed.
+   */
+  void
+  load(const std::string& fileName);
+
+public:
+  CaProfile m_caItem;
+  /**
+   * Used for CA redirection
+   * @sa https://github.com/named-data/ndncert/wiki/NDNCERT-Protocol-0.3-PROBE-Extensions#probe-extension-for-redirection
+   */
+  optional<std::vector<std::shared_ptr<security::Certificate>>> m_redirection = nullopt;
+  /**
+   * Name Assignment Functions
+   */
+  std::vector<std::unique_ptr<NameAssignmentFunc>> m_nameAssignmentFuncs;
+};
+
+} // namespace ca
+} // namespace ndncert
+} // namespace ndn
+
+#endif // NDNCERT_DETAIL_CA_CONFIGURATION_HPP