law cast6_block_round_trip_dual

bend-osdev-crypto@0.1.0.0 · LAWS.bend:931

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/cast6.bend as C6

931# CAST-256 (legacy-ciphers): encryption undoes decryption (a permutation of the blocks)
932law cast6_block_round_trip_dual:
933  for k: C6.LcCast6Key
934  for +b: M.CmBlock
935  {C6.LcCast6.encrypt(k, C6.LcCast6.decrypt(k, b)) == b : M.CmBlock}