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Problem: use of libsodium vs. tweetnacl is confused

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It's unclear which we need and in the source code, conditional code
treats tweetnacl as a subclass of libsodium, which is inaccurate.

Solution: redesign the configure/cmake API for this:

* tweetnacl is present by default and cannot be enabled
* libsodium can be enabled using --with-libsodium, which replaces
  the built-in tweetnacl
* CURVE encryption can be disabled entirely using --enable-curve=no

The macros we define in platform.hpp are:

    ZMQ_HAVE_CURVE    1        //  When CURVE is enabled
    HAVE_LIBSODIUM    1        //  When we are using libsodium
    HAVE_TWEETNACL    1        //  When we're using tweetnacl (default)

As of this patch, the default build of libzmq always has CURVE
security, and always uses tweetnacl.
This commit is contained in:
Pieter Hintjens
2016-02-11 13:32:01 +01:00
parent 42ab88e486
commit b49a60410a
16 changed files with 610 additions and 610 deletions
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16
src/curve_server.hpp
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@@ -30,15 +30,17 @@
#ifndef __ZMQ_CURVE_SERVER_HPP_INCLUDED__
#define __ZMQ_CURVE_SERVER_HPP_INCLUDED__
#ifdef ZMQ_HAVE_CURVE
#include "platform.hpp"
#ifdef HAVE_LIBSODIUM
#ifdef HAVE_TWEETNACL
#include "tweetnacl_base.h"
#include "randombytes.h"
#else
#include "sodium.h"
#if defined (HAVE_TWEETNACL)
# include "tweetnacl_base.h"
# include "randombytes.h"
#elif defined (HAVE_LIBSODIUM)
# include "sodium.h"
#endif
#if crypto_box_NONCEBYTES != 24 \
|| crypto_box_PUBLICKEYBYTES != 32 \
|| crypto_box_SECRETKEYBYTES != 32 \
@@ -47,7 +49,7 @@
|| crypto_secretbox_NONCEBYTES != 24 \
|| crypto_secretbox_ZEROBYTES != 32 \
|| crypto_secretbox_BOXZEROBYTES != 16
#error "libsodium not built properly"
# error "libsodium not built properly"
#endif
#include "mechanism.hpp"