law streebog256_streaming

bend-osdev-hashes@0.1.0.0 · LAWS.bend:329

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B
import bend-osdev-hashes@0.1.0.0/hashes.bend as Hs
import bend-osdev-hashes@0.1.0.0/streebog.bend as ST

329# Streebog-256 (RFC 6986): update over a ++ b is update over a, then b, from every state
330law streebog256_streaming:
331  for s: Hs.HsMdState<ST.HsStbCv>
332  for +a: B.Octets
333  for +b: B.Octets
334  {ST.HsStreebog.update(s, B.Octets.append(a, b)) == ST.HsStreebog.update(ST.HsStreebog.update(s, a), b) : Hs.HsMdState<ST.HsStbCv>}