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e015a0f8b9
Solution: add a crypto [de-]initialiser, refcounted and serialised through critical sections. This is necessary as utility APIs such as zmq_curve_keypair also call into the sodium/tweetnacl libraries and need the initialisation outside of the zmq context. Also the libsodium documentation explicitly says that sodium_init must not be called concurrently from multiple threads, which could have happened until now. Also the randombytes_close function does not appear to be thread safe either. This change guarantees that the library is initialised only once at any given time across the whole program. Fixes #2632
53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
/*
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Copyright (c) 2007-2017 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_RANDOM_HPP_INCLUDED__
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#define __ZMQ_RANDOM_HPP_INCLUDED__
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#include "stdint.hpp"
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namespace zmq
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{
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// Seeds the random number generator.
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void seed_random ();
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// Generates random value.
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uint32_t generate_random ();
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// [De-]Initialise crypto library, if needed.
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// Serialised and refcounted, so that it can be called
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// from multiple threads, each with its own context, and from
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// the various zmq_utils curve functions safely.
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void random_open ();
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void random_close ();
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}
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#endif
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