Change request id to be generated by keyed hash function
- So request with same certificate cannot be used again

Change-Id: I8211e4edcb9a86cb5fbd2c0f8e90b9d4c8864326
diff --git a/src/ca-module.hpp b/src/ca-module.hpp
index bcf7b7b..8172688 100644
--- a/src/ca-module.hpp
+++ b/src/ca-module.hpp
@@ -109,6 +109,7 @@
   CaConfig m_config;
   unique_ptr<CaStorage> m_storage;
   security::v2::KeyChain& m_keyChain;
+  uint8_t m_requestIdGenKey[16];
 
   std::list<RegisteredPrefixHandle> m_registeredPrefixHandles;
   std::list<InterestFilterHandle> m_interestFilterHandles;