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/*
Copyright (c) 2007-2015 Contributors as noted in the AUTHORS file
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
0MQ 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ZMQ_CURVE_SERVER_HPP_INCLUDED__
#define __ZMQ_CURVE_SERVER_HPP_INCLUDED__
#include "platform.hpp"
#ifdef HAVE_LIBSODIUM
#ifdef HAVE_TWEETNACL
#include "tweetnacl_base.h"
#include "randombytes.h"
#else
#include "sodium.h"
#endif
#if crypto_box_NONCEBYTES != 24 \
|| crypto_box_PUBLICKEYBYTES != 32 \
|| crypto_box_SECRETKEYBYTES != 32 \
|| crypto_box_ZEROBYTES != 32 \
|| crypto_box_BOXZEROBYTES != 16 \
|| crypto_secretbox_NONCEBYTES != 24 \
|| crypto_secretbox_ZEROBYTES != 32 \
|| crypto_secretbox_BOXZEROBYTES != 16
#error "libsodium not built properly"
#endif
#include "mechanism.hpp"
#include "options.hpp"
namespace zmq
{
class msg_t;
class session_base_t;
class curve_server_t : public mechanism_t
{
public:
curve_server_t (session_base_t *session_,
const std::string &peer_address_,
const options_t &options_);
virtual ~curve_server_t ();
// mechanism implementation
virtual int next_handshake_command (msg_t *msg_);
virtual int process_handshake_command (msg_t *msg_);
virtual int encode (msg_t *msg_);
virtual int decode (msg_t *msg_);
virtual int zap_msg_available ();
virtual status_t status () const;
private:
enum state_t {
expect_hello,
send_welcome,
expect_initiate,
expect_zap_reply,
send_ready,
send_error,
error_sent,
connected
};
session_base_t * const session;
const std::string peer_address;
// Current FSM state
state_t state;
// Status code as received from ZAP handler
std::string status_code;
uint64_t cn_nonce;
uint64_t cn_peer_nonce;
// Our secret key (s)
uint8_t secret_key [crypto_box_SECRETKEYBYTES];
// Our short-term public key (S')
uint8_t cn_public [crypto_box_PUBLICKEYBYTES];
// Our short-term secret key (s')
uint8_t cn_secret [crypto_box_SECRETKEYBYTES];
// Client's short-term public key (C')
uint8_t cn_client [crypto_box_PUBLICKEYBYTES];
// Key used to produce cookie
uint8_t cookie_key [crypto_secretbox_KEYBYTES];
// Intermediary buffer used to speed up boxing and unboxing.
uint8_t cn_precom [crypto_box_BEFORENMBYTES];
int process_hello (msg_t *msg_);
int produce_welcome (msg_t *msg_);
int process_initiate (msg_t *msg_);
int produce_ready (msg_t *msg_);
int produce_error (msg_t *msg_) const;
void send_zap_request (const uint8_t *key);
int receive_and_process_zap_reply ();
mutex_t sync;
};
}
#endif
#endif