TLSWrappedBuffer do_handshake fails about python-mbedtls

[skelsec]

Additional info: I'm using the pip packaged version here. I tried to compile it myself on my Ubuntu 20.04 machine. Compilation was done without errors, but when importing the mbedtls package I got segfault.

[Synss]

I expect to get a WantReadError or a WantWriteError and be able to obtain the initial handshake bytes

Yes, I am aware of that and it is partly fixed on master. I am still working on it, however. The changes required are not trivial.

but when importing the mbedtls package I got segfault

The bindings only support the latest mbedtls 2.6 (I have 2.16.12 on my own machine now). You should probably set LD_LIBRARY_PATH or use auditwheel on Linux or delocate on MacOS. I would recommend using the scripts under scripts, such as scripts/download* and scripts/install-pymbedtls*.

Awesome project, thank you for it!

Thank you!

[Synss]

I have added a comprehensive test on master with a full handshake using the wrapped buffer. I checked that calling do_handshake() on the wrong end raises WantReadError or WantWriteError but I have no test for that yet. I have to think how to organise the code better.