(*SHA256-specific files*)

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.