topic Re:Run sgx_create_enclave() from dll in Intel® Software Guard Extensions (Intel® SGX)

Run sgx_create_enclave() from dll

nadiaivc — Sun, 23 May 2021 08:59:15 GMT

Hello!
Is it possible to run sgx enclave from dll? I have got an .exe application (untrusted module ) that call sgx_create_enclave() and also can call functions from the enclave. But I want to put this untrusted module in different process as dll (so I want this structure: dll (untrusted module) runs dll (enclave)). But it isn't work now... The thread with my LoadLibrary frozes on sgx_create_enclave()

Re:Run sgx_create_enclave() from dll

JesusG_Intel — Tue, 25 May 2021 14:54:24 GMT

Hello nadia111,

Please describe how you setup the Visual Studio solution for your three projects: the main untrusted executable app, the untrusted dll, and the enclave dll.

Provide:

Screenshots of project properties for C/C++ and Linker.

Screenshot of the solution tree with the projects expanded.

Sincerely,

Jesus G.

Intel Customer Support

Re: Re:Run sgx_create_enclave() from dll

nadiaivc — Wed, 26 May 2021 08:21:56 GMT

Hello,

Sure. "hello" project is a project with a printing string. In hello.exe I want to inject sgxConsoleApplication.dll (right side). I do injection of sgxConsoleApplication.dll to hello.exe with LoadLibrary.

hello project (the main untrusted executable app)

sgxConsoleApplication (the untrusted dll)

EnclaveTest (the enclave dll)

Re:Run sgx_create_enclave() from dll

JesusG_Intel — Thu, 27 May 2021 16:10:28 GMT

Thank you for the comprehensive details, Nadia. I am investigating your issue and will respond when I have something useful for you.

Sincerely,

Jesus G.

Intel Customer Support

Re: Re:Run sgx_create_enclave() from dll

nadiaivc — Fri, 28 May 2021 05:26:24 GMT

Thank you! I will wait for your answer

Re: Run sgx_create_enclave() from dll

JesusG_Intel — Fri, 28 May 2021 19:20:19 GMT

Hello Nadia,

I was able to create an untrusted dll, that interfaces with the enclave, and linked the unstrusted dll with a regular console app and it all worked. I did not use LoadLibrary. Attached are the solution files for your reference. I used absolute paths in the Properties so you will have to modify them.

The Untrusted solution contains the Untrusted DLL project and the SGXSDK/SampleEnclave/Enclave project.

Make sure to copy your untrusted dll and enclave.signed.dll to the same location as hello.exe. Set the Debugging/Working Directory to $(OutDir).

I copied the contents from SampleEnclave/app.cpp to Untrusted/dllmain.cpp.

Good luck!

Sincerely,
Jesus G.
Intel Customer Support

Re: Run sgx_create_enclave() from dll

nadiaivc — Sat, 29 May 2021 11:41:32 GMT

Hello!
I made edits to my project using your sample and it works (yes, it is a "Sucdddess"). I'm so happy! Thank you very much for your time and help!!

Re:Run sgx_create_enclave() from dll

JesusG_Intel — Wed, 02 Jun 2021 22:44:02 GMT

I'm very glad you got it working, Nadia.

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