[zapps-wg] Trusted Rust build process is ready for evaluation

[Devrandom]

Thank you.  Will do the verification shortly.

Also, I've updated the instructions in
https://github.com/devrandom/powersoftau/wiki/Trusted-build-instructions-via-mrustc
to
use the cargo built by mrustc.  This required vendoring of the dependencies.


On Tue, Dec 5, 2017 at 11:24 AM Sean Bowe <sean at z.cash> wrote:

> Excellent work! :)
>
> new, compute, verify_transform is a good demonstration. I would
> verify_transform with a binary compiled with the normal Rust compiler
> to double-check.
>
> Sean
>
> On Tue, Dec 5, 2017 at 11:59 AM, Devrandom <c1.devrandom at niftybox.net>
> wrote:
> > Hi all,
> >
> > I was able to build rustc completely from sources.  This means no network
> > access during the build and without any Rust distributed binaries.
> >
> > The steps are here:
> >
> >
> https://github.com/devrandom/powersoftau/wiki/Trusted-build-instructions-via-mrustc
> >
> > I'm still looking into building a cargo binary that supports TLS, to
> > eliminate the need to download it for building powersoftau itself.  Worst
> > case we can use a shell script.
> >
> > Would like to merge https://github.com/ebfull/pairing/pull/72 so that we
> > don't have to maintain a separate patch for Rust 1.19 compatibility.
> >
> > Sean, what is the best method of validating that the generated binary
> works
> > correctly?  Just use "new", then "compute" and then "verify_transform"?
> >
> > Also, I found that the generated binary is *very* different from the one
> > generated by the downloadable Rust compiler.  This is somewhat worrisome,
> > although it doesn't affect us if we use the mrustc path.  Will spend a
> bit
> > more time to get to the bottom of it.
> >
>