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/*
Copyright (c) 2007-2013 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_CLIENT_HPP_INCLUDED__
#define __ZMQ_CURVE_CLIENT_HPP_INCLUDED__
#include "platform.hpp"
#ifdef HAVE_LIBSODIUM
#include <sodium.h>
#if crypto_box_NONCEBYTES != 24 \
|| crypto_box_PUBLICKEYBYTES != 32 \
|| crypto_box_SECRETKEYBYTES != 32 \
|| crypto_box_ZEROBYTES != 32 \
|| crypto_box_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_client_t : public mechanism_t
{
public:
curve_client_t (const options_t &options_);
virtual ~curve_client_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 bool is_handshake_complete () const;
private:
enum state_t {
send_hello,
expect_welcome,
send_initiate,
expect_ready,
connected
};
// Current FSM state
state_t state;
// Our public key (C)
uint8_t public_key [crypto_box_PUBLICKEYBYTES];
// Our secret key (c)
uint8_t secret_key [crypto_box_SECRETKEYBYTES];
// Our short-term public key (C')
uint8_t cn_public [crypto_box_PUBLICKEYBYTES];
// Our short-term secret key (c')
uint8_t cn_secret [crypto_box_SECRETKEYBYTES];
// Server's public key (S)
uint8_t server_key [crypto_box_PUBLICKEYBYTES];
// Server's short-term public key (S')
uint8_t cn_server [crypto_box_PUBLICKEYBYTES];
// Cookie received from server
uint8_t cn_cookie [16 + 80];
// Intermediary buffer used to seepd up boxing and unboxing.
uint8_t cn_precom [crypto_box_BEFORENMBYTES];
// Nonce
uint64_t cn_nonce;
int produce_hello (msg_t *msg_);
int process_welcome (msg_t *msg_);
int produce_initiate (msg_t *msg_);
int process_ready (msg_t *msg_);
};
}
#endif
#endif
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