@jirka
Oh, I forgot. BearSSL it's pretty portable
it will build under GNU/Linux 2.4 based distros
such as Damn Small Linux.
Thus, it might compile under SGI Irix.
libTLS running on top of BearSSL:
https://github.com/michaelforney/libtls-bearssl
I've got it working under DSL. If it works
under Irix, you might compile hurl too:
git://codemadness.org/hurl
After that, you would be able to plug https audio streams into
mpg123 or ogg123, such as AnonRadio from SDF:
hurl https://anonradio.net:8443/anonradio | mpg123 -