command-interest-signer.cpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#include "command-interest-signer.hpp"
#include "../util/random.hpp"

namespace ndn {
namespace security {

CommandInterestPreparer::CommandInterestPreparer()
  : m_lastUsedTimestamp(0)
{
}

Name
CommandInterestPreparer::prepareCommandInterestName(Name name)
{
  time::milliseconds timestamp = time::toUnixTimestamp(time::system_clock::now());
  if (timestamp <= m_lastUsedTimestamp) {
    timestamp = m_lastUsedTimestamp + time::milliseconds(1);
  }
  m_lastUsedTimestamp = timestamp;

  name
    .append(name::Component::fromNumber(timestamp.count()))
    .append(name::Component::fromNumber(random::generateWord64())) // nonce
    ;

  return name;
}

CommandInterestSigner::CommandInterestSigner(v2::KeyChain& keyChain)
  : m_keyChain(keyChain)
{
}

Interest
CommandInterestSigner::makeCommandInterest(const Name& name, const SigningInfo& params)
{
  Interest commandInterest(prepareCommandInterestName(name));
  m_keyChain.sign(commandInterest, params);
  return commandInterest;
}

} // namespace security
} // namespace ndn