If you want to include support for Transport Layer Security (tls+tcp:// and wss:// URLs) you should follow these directions.
At this time, TLS support depends on the Mbed TLS library.
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Mbed TLS is licensed under different terms than NNG. You are responsible for reading those license terms, and ensuring that your use conforms to them. |
On many distributions you may be able to install a pre-packaged version
of Mbed TLS. We recommend doing so if this is an option for you.
For example, Ubuntu users can install the libmbedtls-dev package.
You can also build Mbed TLS from source; if you choose to do so, please make sure you also install it somewhere (even a temporary staging directory).
TLS support is not enabled by default, but can be enabled by configuring
with the CMake option NNG_ENABLE_TLS=ON.
By default NNG searches for an installed copy of Mbed TLS in /usr/local,
as well as the normal installation directories for libraries on your system.
If you have installed Mbed TLS elsewhere, you can direct the NNG configuration
to it by setting the MBEDTLS_ROOT_DIR CMake variable.
The following example would work on either Linux or macOS, and assumes
that we have checked out github source trees into $HOME/work.
It also assumes that Mbed TLS is already installed in /usr/local or
a standard search path.
$ export NNGDIR=$HOME/work/nng
$ mkdir build
$ cd build
$ cmake -DNNG_ENABLE_TLS=ON ..
... (lots of lines of output from cmake...)
$ make
... (lots of lines of output from make...)
$ ./tests/tls
ok ./tests/tls 1.503s