1/*
2 Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
3
4 This file is part of libzmq, the ZeroMQ core engine in C++.
5
6 libzmq is free software; you can redistribute it and/or modify it under
7 the terms of the GNU Lesser General Public License (LGPL) as published
8 by the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 As a special exception, the Contributors give you permission to link
12 this library with independent modules to produce an executable,
13 regardless of the license terms of these independent modules, and to
14 copy and distribute the resulting executable under terms of your choice,
15 provided that you also meet, for each linked independent module, the
16 terms and conditions of the license of that module. An independent
17 module is a module which is not derived from or based on this library.
18 If you modify this library, you must extend this exception to your
19 version of the library.
20
21 libzmq is distributed in the hope that it will be useful, but WITHOUT
22 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
23 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
24 License for more details.
25
26 You should have received a copy of the GNU Lesser General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>.
28*/
29
30#ifndef __ZMQ_CURVE_MECHANISM_BASE_HPP_INCLUDED__
31#define __ZMQ_CURVE_MECHANISM_BASE_HPP_INCLUDED__
32
33#ifdef ZMQ_HAVE_CURVE
34
35#if defined(ZMQ_USE_TWEETNACL)
36#include "tweetnacl.h"
37#elif defined(ZMQ_USE_LIBSODIUM)
38#include "sodium.h"
39#endif
40
41#if crypto_box_NONCEBYTES != 24 || crypto_box_PUBLICKEYBYTES != 32 \
42 || crypto_box_SECRETKEYBYTES != 32 || crypto_box_ZEROBYTES != 32 \
43 || crypto_box_BOXZEROBYTES != 16 || crypto_secretbox_NONCEBYTES != 24 \
44 || crypto_secretbox_ZEROBYTES != 32 || crypto_secretbox_BOXZEROBYTES != 16
45#error "CURVE library not built properly"
46#endif
47
48#include "mechanism_base.hpp"
49#include "options.hpp"
50
51#include <memory>
52
53namespace zmq
54{
55class curve_mechanism_base_t : public virtual mechanism_base_t
56{
57 public:
58 curve_mechanism_base_t (session_base_t *session_,
59 const options_t &options_,
60 const char *encode_nonce_prefix_,
61 const char *decode_nonce_prefix_);
62
63 // mechanism implementation
64 virtual int encode (msg_t *msg_);
65 virtual int decode (msg_t *msg_);
66
67 protected:
68 const char *encode_nonce_prefix;
69 const char *decode_nonce_prefix;
70
71 uint64_t cn_nonce;
72 uint64_t cn_peer_nonce;
73
74 // Intermediary buffer used to speed up boxing and unboxing.
75 uint8_t cn_precom[crypto_box_BEFORENMBYTES];
76};
77}
78
79#endif
80
81#endif
82