def ecb_rt.twofish

bend-osdev-crypto@0.1.0.0 · PROOF.bend:1108

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/twofish.bend as Tf
import bend-osdev-legacy-ciphers@0.1.0.0/LAWS.bend as LL
import bend-osdev-crypto@0.1.0.0/modes.bend as Md

1108def ecb_rt.twofish(+k: Tf.LcTwofishKey, bs: List<&2, M.CmBlock>) -> {bs == Md.cr.ecb(~Tf.LcTwofishKey, ~M.CmBlock, ~Tf.LcTwofish.decrypt, k, Md.cr.ecb(~Tf.LcTwofishKey, ~M.CmBlock, ~Tf.LcTwofish.encrypt, k, bs)) : List<&2, M.CmBlock>}:
1109  match bs:
1110    case Nil{}:
1111      {==}
1112    case Con{b, t}:
1113      %Equal.sym(M.CmBlock, Tf.LcTwofish.decrypt(k, Tf.LcTwofish.encrypt(k, b)), b, LL.twofish_round_trip(k, b)) : {Con{b, t} == Con{_, Md.cr.ecb(~Tf.LcTwofishKey, ~M.CmBlock, ~Tf.LcTwofish.decrypt, k, Md.cr.ecb(~Tf.LcTwofishKey, ~M.CmBlock, ~Tf.LcTwofish.encrypt, k, t))} : List<&2, M.CmBlock>}
1114      %ecb_rt.twofish(k, t) : {Con{b, t} == Con{b, _} : List<&2, M.CmBlock>}
1115      {==}