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Hi,
Is there a way to get the time when running in enclave mode (without a syscall) and be sure that this is not manipulated by a malicious OS? I know about the RDTSC instruction, but the TSC register can be modified from outside the enclave, so this can not be considered secure. To be more specific, I am interested if we can get the time elapsed between two instructions executed in enclave mode.
Thank you
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You could use "Platform Service Functions" - "sgx_get_trusted_time"
The resolution is in seconds though...
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Hi,
I noticed that in the reference manual
It says (page 199 on my version)
sgx_get_trusted_time
sgx_get_trusted_time gets trusted time from the AE service.
This API is only available in simulation mode
This is at least the case for Linux.
I
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Hi,
Thank you for your replies. sgx_get_trusted_time is the kind of function I was looking for and somehow missed it in the manual, Thanks again.
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As of 2017, in the latest processors, the sgx_get_trusted_time is also supported in harwdare mode through PSE (Platform Service Enclaves) maintained and signed by Intel.
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