41-90 Vol. 3D

SGX INSTRUCTION REFERENCES

(* Determine values key is based on *)
TMP_KEYDEPENDENCIES.KEYNAME  PROVISION_SEAL_KEY;
TMP_KEYDEPENDENCIES.ISVPRODID  TMP_CURRENTSECS.ISVPRODID;
TMP_KEYDEPENDENCIES.ISVSVN  DS:RBX.ISVSVN;
TMP_KEYDEPENDENCIES.OWNEREPOCH  0;
TMP_KEYDEPENDENCIES.ATTRIBUTES  TMP_ATTRIBUTES;
TMP_KEYDEPENDENCIES.ATTRIBUTESMASK  DS:RBX.ATTRIBUTEMASK;
TMP_KEYDEPENDENCIES.MRENCLAVE  0;
TMP_KEYDEPENDENCIES.MRSIGNER  TMP_CURRENTSECS.MRSIGNER;
TMP_KEYDEPENDENCIES.KEYID  0;
TMP_KEYDEPENDENCIES.SEAL_KEY_FUSES  CR_SEAL_FUSES;
TMP_KEYDEPENDENCIES.CPUSVN  DS:RBX.CPUSVN;
TMP_KEYDEPENDENCIES.PADDING  TMP_CURRENTSECS.PADDING;
TMP_KEYDEPENDENCIES.MISCSELECT  TMP_MISCSELECT;
TMP_KEYDEPENDENCIES.MISCMASK  ~DS:RBX.MISCMASK;
BREAK;

DEFAULT:

(* The value of KEYNAME is invalid *)
RFLAGS.ZF  1;
RAX  SGX_INVALID_KEYNAME;
GOTO EXIT:

ESAC;

(* Calculate the final derived key and output to the address in RCX *)
TMP_OUTPUTKEY  derivekey(TMP_KEYDEPENDENCIES);
DS:RCX[15:0]  TMP_OUTPUTKEY;
RAX  0;
RFLAGS.ZF  0;

EXIT:
RFLAGS.CF  0;
RFLAGS.PF  0;
RFLAGS.AF  0;
RFLAGS.OF  0;
RFLAGS.SF  0;

Flags Affected

ZF is cleared if successful, otherwise ZF is set. CF, PF, AF, OF, SF are cleared.

Protected Mode Exceptions

#GP(0)

If a memory operand effective address is outside the current enclave.
If an effective address is not properly aligned.
If an effective address is outside the DS segment limit.
If KEYREQUEST format is invalid.

#PF(error code)

If a page fault occurs in accessing memory.

64-Bit Mode Exceptions

#GP(0)

If a memory operand effective address is outside the current enclave.
If an effective address is not properly aligned.
If an effective address is not canonical.
If KEYREQUEST format is invalid.

#PF(error code)

If a page fault occurs in accessing memory operands.