Article ID: 000059981 Content Type: Product Information & Documentation Last Reviewed: 07/31/2024

How Do I Call an Intel® Software Guard Extensions (Intel® SGX) Trusted Function from an Untrusted Application?

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Summary

How to create a function within an enclave that is callable from an untrusted application

Description

Unable to call an Intel® Software Guard Extensions (Intel® SGX) trusted function from an untrusted application.

Resolution

Trusted functions can be called only from within an enclave via an enclave call (ECALL).

Refer to the Enclave Development Basics section in the Intel® SGX SDK Developer Reference Guide for Windows* for complete details on ECALLs, outside calls (OCALLs), and other topics for developing Intel® SGX applications.

The SGX101 enclave_example, which is based on the SampleEnclave in the SGX SDK, is a simple tutorial on creating an enclave with a single ECALL and OCALL.

Additional information

The Intel® SGX Developer Reference for Linux* is in the Documentation folder of the latest release of the Intel® Software Guard Extensions SDK for Linux*.

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