Definition c48 := 48%nat.

(* Specifications: *)
Lemma generate_word_W: forall block n (LB: length block = 16%nat), 0 <= n < 64 -> nthi (rev (generate_word (rev block) 48)) n = W (nthi block) n.
Lemma process_block_hash_block: forall regs block, length regs = 8%nat -> length block = 16%nat -> process_block regs (rev block) = hash_block regs block.
Lemma SHA_256'_eq: SHA_256' = SHA_256.