law cast5_ecb_round_trip

bend-osdev-crypto@0.1.0.0 · LAWS.bend:1021

import Base
import bend-osdev-legacy-ciphers@0.1.0.0/legacy_ciphers.bend as L
import bend-osdev-legacy-ciphers@0.1.0.0/cast5.bend as C5
import bend-osdev-crypto@0.1.0.0/modes.bend as Md

1021# CAST-128 (legacy-ciphers) in ECB (modes.bend): decryption undoes encryption, for every key and list of blocks
1022law cast5_ecb_round_trip:
1023  for +k: C5.LcCast5Key
1024  for +bs: List<&2, L.LcBlock64>
1025  {Md.CrEcb.decrypt_blocks(~C5.LcCast5Key, ~L.LcBlock64, ~C5.LcCast5.decrypt, k, Md.CrEcb.encrypt_blocks(~C5.LcCast5Key, ~L.LcBlock64, ~C5.LcCast5.encrypt, k, bs)) == bs : List<&2, L.LcBlock64>}