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ENCLUEGETKEY

Retrieves the key associated with the current enclave and stores it in the specified destination register.

The table after the description covers what the source and destinations can be.

DO NOT support LOCK

This instruction is only available when the processor is operating in enclave mode. Attempting to execute this instruction outside of an enclave will result in a general protection exception (#GP).

The destination register must be a 64-bit general-purpose register. Failure to provide a valid register will result in an invalid opcode exception. The retrieved key is specific to the enclave and is not accessible to any code running outside the enclave boundary.