Theorem HMAC_concat_pad_explicit : forall (k m : Blist) (op ip : Blist), length k = b -> length ip = b -> length op = b -> sha.HMAC_spec_pad.HMAC c p B sha_h sha_iv sha_splitandpad op ip k m = HMAC_Concat.HMAC c p B sha_h sha_iv sha_splitandpad_inc fpad op ip k m.