law hmac_streebog256_split

bend-osdev-crypto@0.1.0.0 · LAWS.bend:1457

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B
import bend-osdev-crypto@0.1.0.0/hmac.bend as Hm
import bend-osdev-hashes@0.1.0.0/hashes.bend as Hs
import bend-osdev-hashes@0.1.0.0/streebog.bend as HST

1457# HMAC over Streebog-256 (hashes): the tag in pieces is the tag in one call, for every split
1458law hmac_streebog256_split:
1459  for +kk: Hm.CrHmacKey
1460  for +a: B.Octets
1461  for +b: B.Octets
1462  {Hm.CrHmac.finish(~Hs.HsMdState<HST.HsStbCv>, ~HST.HsStreebog.init256(), ~HST.HsStreebog.update, ~HST.HsStreebog.final256, Hm.CrHmac.update(~Hs.HsMdState<HST.HsStbCv>, ~HST.HsStreebog.update, Hm.CrHmac.update(~Hs.HsMdState<HST.HsStbCv>, ~HST.HsStreebog.update, Hm.CrHmac.start(~Hs.HsMdState<HST.HsStbCv>, ~HST.HsStreebog.init256(), ~HST.HsStreebog.update, kk), a), b)) == Hm.CrHmac.mac(~HST.HsStreebog.digest256, kk, B.Octets.append(a, b)) : B.Octets}