signature.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NDN_SIGNATURE_HPP
#define NDN_SIGNATURE_HPP

#include "common.hpp"
#include "signature-info.hpp"

namespace ndn {

class Signature
{
public:
  class Error : public tlv::Error
  {
  public:
    explicit
    Error(const std::string& what)
      : tlv::Error(what)
    {
    }
  };

  enum {
    Sha256 = tlv::DigestSha256,
    Sha256WithRsa = tlv::SignatureSha256WithRsa,
    Sha256WithEcdsa = tlv::SignatureSha256WithEcdsa
  };

  Signature() = default;

  explicit
  Signature(const Block& info, const Block& value = Block());

  explicit
  Signature(const SignatureInfo& info, const Block& value = Block());

  operator bool() const
  {
    return m_info.getSignatureType() != -1;
  }

  const Block&
  getInfo() const
  {
    return m_info.wireEncode(); // will do nothing if wire already exists
  }

  void
  setInfo(const Block& info);

  void
  setInfo(const SignatureInfo& info)
  {
    m_info = info;
  }

  const Block&
  getValue() const
  {
    m_value.encode(); // will do nothing if wire already exists
    return m_value;
  }

  void
  setValue(const Block& value);

  uint32_t
  getType() const
  {
    return m_info.getSignatureType();
  }

  bool
  hasKeyLocator() const
  {
    return m_info.hasKeyLocator();
  }

  const KeyLocator&
  getKeyLocator() const
  {
    return m_info.getKeyLocator();
  }

  void
  setKeyLocator(const KeyLocator& keyLocator)
  {
    m_info.setKeyLocator(keyLocator);
  }

  void
  unsetKeyLocator()
  {
    m_info.unsetKeyLocator();
  }

public: // EqualityComparable concept
  bool
  operator==(const Signature& other) const
  {
    return getInfo() == other.getInfo() &&
      getValue() == other.getValue();
  }

  bool
  operator!=(const Signature& other) const
  {
    return !(*this == other);
  }

protected:
  SignatureInfo m_info;
  mutable Block m_value;
};

} // namespace ndn

#endif // NDN_SIGNATURE_HPP