What's the purpose of the code in /src/talso/enclaveshim about talos

[plaublin]

You normally don't have to modify this file, nor the files in src/talos/enclaveshim. They are copied into src/libressl-2.4.1/crypto when executing patch_libressl.sh.

This file is necessary to compile the ecall and ocall interface file of the SDK (files enclave_[ut].[ch]). Indeed, the enclave.edl uses several types that need to be defined. So unless you modify enclave.edl and add a new type that is not already defined you shouldn't have to modify it.

[bsdinis]

I see..

I still have trouble linking TaLoS with my enclave code. I've added a from "/path/to/enclave.edl" import * to my EDL file, and the correct path for the include files, but many of them have things unavailable in enclaves (eg: FILE's, etc.).

Am I missing something?

[plaublin]

TaLoS has been successfully integrated with other enclave project in the past, so this should definitely work. However I have never tried.

Do you need to import openssl_types.h in your edl file?

What error do you get? Is it when compiling your enclave source code, the SDK interface files?

[bsdinis]

openssl/pem.h has a lot of references to FILE *, which fail to compile;
openssl/tls1.h has a double prototype to SSL_get_servername
openssl/dtls1.h includes sys/time.h, which cannot be found

In my EDL file, I am not including openssl_types.h, but I do include the EDL file from the project
this is when I'm compiling the enclave code

[plaublin]

I think we never encountered this problem because we never used this part of the code. What you would need to do is modify the header files so that they can compile successfully:
-openssl/pem.h: define the missing FILE* type;
-openssl/tls1.h: remove the double prototype;
-openssl/dtls1.h: don't include sys/time.h when compiling with SGX.