Intel Extensible Firmware Interface - Manual (Page 692)

Extensible Firmware Interface Specification
15-86 12/01/02 Version 1.10
Status Codes Returned
EFI_SUCCESS The function completed successfully.
EFI_NO_MAPPING The AppHandle parameter is not or is no longer a valid
application instance handle associated with the EFI_BIS protocol.
EFI_OUT_OF_RESOURCES The function failed due to lack of memory or other resources.
EFI_DEVICE_ERROR The function encountered an unexpected internal error in a
cryptographic software module, or
The function encountered an unexpected internal consistency
check failure (possible corruption of stored Boot Object
Authorization Certificate).
EFI_INVALID_PARAMETER The SignatureInfo parameter supplied by the caller is
NULL or an invalid memory reference.