[bls-signatures] Initial integration

[guidovranken]

Differential fuzzing of 3 BLS signature libraries

• blst https://github.com/supranational/blst
• Chia bls-signatures https://github.com/Chia-Network/bls-signatures/
• Herumi mcl https://github.com/herumi/mcl

BLS signatures are a critical security feature in cryptocurrency clients, such as:

• Ethereum 2.0
• Chia
• DFinity
• Filecoin

If this project is accepted, I will add more auto_cc's later.

[AdamKorcz]

Could you adjust the title of the PR to suggest this is an initial integration?

[guidovranken]

@AdamKorcz I've addressed the issues you raised.

The CI says the UBSAN build fails the build check, but I cannot reproduce this locally.

[AdamKorcz]

I tried this locally. The broken build reproduces with the following steps:

1. sudo python3 infra/helper.py pull_images
2. sudo python3 infra/helper.py build_image bls-signatures
3. sudo python3 infra/helper.py build_fuzzers bls-signatures --engine libfuzzer --sanitizer undefined --architecture x86_64
4. sudo python3 infra/helper.py check_build bls-signatures --engine libfuzzer --sanitizer undefined --architecture x86_64 <- Build error happens here.

[AdamKorcz]

I followed the steps taken in my last comment but with the build file from the first commit in this PR (which passed CI), and the same errors were encountered during the check_build step.

[guidovranken]

I tried this locally. The broken build reproduces with the following steps:

1. `sudo python3 infra/helper.py pull_images`

2. `sudo python3 infra/helper.py build_image bls-signatures`

3. `sudo python3 infra/helper.py build_fuzzers bls-signatures --engine libfuzzer --sanitizer undefined --architecture x86_64`

4. `sudo python3 infra/helper.py check_build bls-signatures --engine libfuzzer --sanitizer undefined --architecture x86_64` <- Build error happens here.

I repeated your steps verbatim (after doing a docker system prune -a) and cannot reproduce. I've disabled the UBSAN build for now.

[AdamKorcz]

Great. This one is ready for review @oliverchang @jonathanmetzman @inferno-chromium @asraa

[jonathanmetzman]

LGTM