Theorem HMAC_concat_pad_sap_instantiated h (HH: forall x y, length x = c -> length y = b -> length (h x y) = c) iv (IV: length iv = c) (op ip : Blist) (IL: length ip = b) (OL: length op = b) : forall (k m : Blist), length k = b -> sha.HMAC_spec_pad.HMAC c p B h iv sha_splitandpad op ip k m = HMAC_Concat.HMAC c p B h iv sha_splitandpad_inc fpad op ip k m.