law sm4_block_round_trip_dual

bend-osdev-crypto@0.1.0.0 · LAWS.bend:711

import Base
import bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend as M
import bend-osdev-legacy-ciphers@0.1.0.0/sm4.bend as S

711# SM4 (legacy-ciphers): encryption undoes decryption (a permutation of the blocks)
712law sm4_block_round_trip_dual:
713  for k: S.LcSm4Key
714  for +b: M.CmBlock
715  {S.LcSm4.encrypt(k, S.LcSm4.decrypt(k, b)) == b : M.CmBlock}