M1 Demo fails with core dumped at get_publickey on some non-sgx machines

[brenzi]

Running the demo on a non-SGX machine

Fails with:

$ docker run -v $(pwd):/substraTEE/backup -ti substratee
root@0f766141f754:/substraTEE# /substraTEE/substraTEE-node-master/target/release/substratee-node --dev > node.log 2>&1 &
[1] 15
root@0f766141f754:/substraTEE# cd /substraTEE/substraTEE-worker-master
root@0f766141f754:/substraTEE/substraTEE-worker-master# ./bin/app getpublickey
Intercating with port 9944

*** Get the public key from the TEE

*** Starting enclave
[+] Home dir is /root
[-] Open token file /root/./bin/enclave.token error! Will create one.
[+] Init Enclave Successful. EID = 206158430210!
Illegal instruction (core dumped)
root@0f766141f754:/substraTEE/substraTEE-worker-master# ./bin/app getsignkey
Intercating with port 9944

*** Get the signing key from the TEE

*** Starting enclave
[+] Home dir is /root
[-] Open token file /root/./bin/enclave.token error! Will create one.
[+] Init Enclave Successful. EID = 210453397506!
Illegal instruction (core dumped)
root@0f766141f754:/substraTEE/substraTEE-worker-master# 

[brenzi]

I guess we should default the container environment variable to SW mode.
Please add a note in the Demo Tutorial on how to enaböle HW mode for people with real SGX setup

https://github.com/scs/substraTEE-worker/blob/5758845e1c34054b0abaf199add4c46d34731dc6/Makefile#L41

[brenzi]

And please fail gracefully if trying to run HW mode in a non-SGX environment.

[electronix]

Can't reproduce the error (running on a non-SGX machine).

What OS/CPU are you running on? Standard notebook?

The code is already compiled in SW mode. Instructions for HW mode should be added, I agree.

[brenzi]

ubuntu 18.04 on a x86 machine

Linux blackbox 4.15.0-47-lowlatency #50-Ubuntu SMP PREEMPT Wed Mar 13 12:45:27 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Intel(R) Pentium(R) CPU G850 @ 2.90GHz

[electronix]

docker --version?

[brenzi]

Docker version 18.09.0, build 4d60db4