Update getrandom-sgx to v2.3

[haerdib]

We're currently trying to update our substrate dependencies to v4.0.0-dev (see issue integritee-network/worker#346). But substrate now depends on hashbrown 0.11.0 which itself depends on getrandom 2.3 (same as in issue #326). We're currently in the development phase, so having our own getrandom fork and keeping it up to date all the time is not yet necessary from a security perspective. A simple patch to your getrandom-sgx crate would be enough.

Would it be possible to update getrandom-sgx to v2.3 so we can apply the patch?

Thanks alot for your help so far!

[haerdib]

I have forked & rebased on newest getrandom master commit: integritee-network/getrandom-sgx#1 and I'd love to create a PR to getrandom-sgx. But I can't build it yet (& tests aren't passing) due the sampleenclave encountering the following errors:

error[E0557]: feature has been removed
  --> /home/bhaerdi/.cargo/git/checkouts/teaclave-sgx-sdk-be25c2ad2f03718d/7c07ce0/sgx_unwind/lib.rs:24:12
   |
24 | #![feature(unwind_attributes)]
   |            ^^^^^^^^^^^^^^^^^ feature has been removed
   |
   = note: use the C-unwind ABI instead

error: cannot find attribute `unwind` in this scope
  --> /home/bhaerdi/.cargo/git/checkouts/teaclave-sgx-sdk-be25c2ad2f03718d/7c07ce0/sgx_unwind/libunwind.rs:65:7
   |
65 |     #[unwind(allowed)]
   |       ^^^^^^

Do you know what I'm missing here?

[clangenb]

This is a rust-toolchain incompatibility, i.e., this feature was most-likely stabilized meanwhile. Therefore, the feature does not need to be activated explicitly.

You should run everything with the same toolchain as advised in teaclave.