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109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
/*
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Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ZMQ_CURVE_MECHANISM_BASE_HPP_INCLUDED__
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#define __ZMQ_CURVE_MECHANISM_BASE_HPP_INCLUDED__
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#ifdef ZMQ_HAVE_CURVE
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#if defined(ZMQ_USE_TWEETNACL)
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#include "tweetnacl.h"
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#elif defined(ZMQ_USE_LIBSODIUM)
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#include "sodium.h"
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#endif
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#if crypto_box_NONCEBYTES != 24 || crypto_box_PUBLICKEYBYTES != 32 \
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|| crypto_box_SECRETKEYBYTES != 32 || crypto_box_ZEROBYTES != 32 \
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|| crypto_box_BOXZEROBYTES != 16 || crypto_secretbox_NONCEBYTES != 24 \
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|| crypto_secretbox_ZEROBYTES != 32 || crypto_secretbox_BOXZEROBYTES != 16
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#error "CURVE library not built properly"
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#endif
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#include "mechanism_base.hpp"
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#include "options.hpp"
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#include <memory>
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namespace zmq
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{
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class curve_encoding_t
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{
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public:
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curve_encoding_t (const char *encode_nonce_prefix_,
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const char *decode_nonce_prefix_,
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const bool downgrade_sub_);
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int encode (msg_t *msg_);
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int decode (msg_t *msg_, int *error_event_code_);
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uint8_t *get_writable_precom_buffer () { return _cn_precom; }
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const uint8_t *get_precom_buffer () const { return _cn_precom; }
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typedef uint64_t nonce_t;
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nonce_t get_and_inc_nonce () { return _cn_nonce++; }
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void set_peer_nonce (nonce_t peer_nonce_) { _cn_peer_nonce = peer_nonce_; };
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private:
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int check_validity (msg_t *msg_, int *error_event_code_);
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const char *_encode_nonce_prefix;
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const char *_decode_nonce_prefix;
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nonce_t _cn_nonce;
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nonce_t _cn_peer_nonce;
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// Intermediary buffer used to speed up boxing and unboxing.
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uint8_t _cn_precom[crypto_box_BEFORENMBYTES];
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const bool _downgrade_sub;
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ZMQ_NON_COPYABLE_NOR_MOVABLE (curve_encoding_t)
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};
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class curve_mechanism_base_t : public virtual mechanism_base_t,
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public curve_encoding_t
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{
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public:
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curve_mechanism_base_t (session_base_t *session_,
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const options_t &options_,
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const char *encode_nonce_prefix_,
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const char *decode_nonce_prefix_,
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const bool downgrade_sub_);
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// mechanism implementation
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int encode (msg_t *msg_) ZMQ_OVERRIDE;
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int decode (msg_t *msg_) ZMQ_OVERRIDE;
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};
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}
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#endif
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#endif
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