**breaking change**: Switch Face and related classes to v2::KeyChain

security::v2::KeyChain is now exposed as ndn::KeyChain, which should
ensure that dependent code can be mostly compiled.  However, expect code
that explicitly uses the old KeyChain interface to be broken.

Change-Id: I7330d0250d92f3f0f2570ab6d0214ab3dfdd18cc
Refs: #3098
diff --git a/src/mgmt/nfd/controller.cpp b/src/mgmt/nfd/controller.cpp
index 4ccb895..bfb0843 100644
--- a/src/mgmt/nfd/controller.cpp
+++ b/src/mgmt/nfd/controller.cpp
@@ -36,9 +36,10 @@
 const uint32_t Controller::ERROR_LBOUND = 400;
 ValidatorNull Controller::s_validatorNull;
 
-Controller::Controller(Face& face, security::v1::KeyChain& keyChain, Validator& validator)
+Controller::Controller(Face& face, KeyChain& keyChain, Validator& validator)
   : m_face(face)
   , m_keyChain(keyChain)
+  , m_signer(keyChain)
   , m_validator(validator)
 {
 }
@@ -56,9 +57,8 @@
     onFailure1 : [] (const ControlResponse&) {};
 
   Name requestName = command->getRequestName(options.getPrefix(), parameters);
-  Interest interest(requestName);
+  Interest interest = m_signer.makeCommandInterest(requestName, options.getSigningInfo());
   interest.setInterestLifetime(options.getTimeout());
-  m_keyChain.sign(interest, options.getSigningInfo());
 
   m_face.expressInterest(interest,
     [=] (const Interest&, const Data& data) {
diff --git a/src/mgmt/nfd/controller.hpp b/src/mgmt/nfd/controller.hpp
index aa4b285..d9bfa1f 100644
--- a/src/mgmt/nfd/controller.hpp
+++ b/src/mgmt/nfd/controller.hpp
@@ -28,6 +28,7 @@
 #include "command-options.hpp"
 #include "../../security/validator-null.hpp"
 #include "../../security/key-chain.hpp"
+#include "../../security/command-interest-signer.hpp"
 
 namespace ndn {
 
@@ -66,7 +67,7 @@
   /** \brief construct a Controller that uses face for transport,
    *         and uses the passed KeyChain to sign commands
    */
-  Controller(Face& face, security::v1::KeyChain& keyChain, security::Validator& validator = s_validatorNull);
+  Controller(Face& face, KeyChain& keyChain, security::Validator& validator = s_validatorNull);
 
   /** \brief start command execution
    */
@@ -170,7 +171,8 @@
 
 protected:
   Face& m_face;
-  security::v1::KeyChain& m_keyChain;
+  KeyChain& m_keyChain;
+  security::CommandInterestSigner m_signer;
   security::Validator& m_validator;
 
 private: