SGX Internal CREGs

gu_j_1 — Fri, 12 Aug 2016 07:02:59 GMT

How to get the value of SGX Internal CREGs?

When enclave A makes a report to enclave B, in enclave B I want to get the same report key which is used during enclave making the report.

So, it seems that I must know some CREGs' value such as CR_SEAL_FUSES.

Thanks.

Hi Gu,

Surenthar_S_Intel — Fri, 19 Aug 2016 04:51:52 GMT

Hi Gu,

There is an SDK API, sgx_verify_report(report), to perform this function. An enclave can also generate the report key using the API, sgx_get_key(key_request, &key), which is a wrapper for SGX's EGETKEY instruction. The report's MAC is generated using AES128_CMAC.

CREG's are internal registers to the part. The programmer is not supposed to have access to them.

Thanks and Regards,
Surenthar Selvaraj

topic Hi Gu, in Intel® Software Guard Extensions (Intel® SGX)

SGX Internal CREGs

Hi Gu,