using a C library within a VFS plugin

[Stefan Thöni]

Hello,

> Nudged by your comment about the wolftpm sources, I had myself a look
> into the GitHub repository [1]. After browsing the code I got the
> impression that the TPM hardware use case (--enable-devtpm) is
> completely independent of LibC if the backend is reimplemented for
> Genode. The SWTPM (--enable-swtpm) naturally requires LibC and a
> network stack to my understanding. Note, I did not check transitive
> dependencies resulting in wolfcrypt.

Thanks to you observations, we succeeded in making wolftpm run without 
the libc mostly by using code from the mini C demo and disabling some 
features of wolfssl we don't care about.

So our proof of concept is now able to get some random from the TPM 
using wolftpm running inside a VFS plugin.

Have a nice weekend
Stefan


-- 
Freundliche Grüsse

Stefan Thöni
Senior Security Architect
+41 79 824 11 90

gapfruit AG
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