def _validate_signature_compatibility(self, boxes):
<EOL>if boxes[<NUM_LIT:0>].box_id != '<STR_LIT>' or boxes[<NUM_LIT:1>].box_id != '<STR_LIT>':<EOL><INDENT>msg = ("<STR_LIT>"<EOL>"<STR_LIT>")<EOL>raise IOError(msg)<EOL><DEDENT>if '<STR_LIT>' not in boxes[<NUM_LIT:1>].compatibility_list:<EOL><INDENT>msg = "<STR_LIT>"<EOL>raise IOError(msg)<EOL><DEDENT>
Validate the file signature and compatibility status.