def lrw_rt.twofish

bend-osdev-crypto@0.1.0.0 · PROOF.bend:1161

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-crypto@0.1.0.0/lrw.bend as Lw
import bend-osdev-gf@0.1.0.0/gf128.bend as G
import bend-osdev-crypto@0.1.0.0/inst_cm.bend as CM

1161def lrw_rt.twofish(+k: Tf.LcTwofishKey, +k2: G.Gf128, bs: List<&2, M.CmBlock>, +i: G.Gf128) -> {bs == Lw.cr.lrw.dec(~Tf.LcTwofishKey, ~M.CmBlock, ~Tf.LcTwofish.decrypt, ~CM.CrBlk128.xor, ~CM.CrBlk128.of_octets, k, k2, Lw.cr.lrw.enc(~Tf.LcTwofishKey, ~M.CmBlock, ~Tf.LcTwofish.encrypt, ~CM.CrBlk128.xor, ~CM.CrBlk128.of_octets, k, k2, bs, i), i) : List<&2, M.CmBlock>}:
1162  match bs:
1163    case Nil{}:
1164      {==}
1165    case Con{+p, t}:
1166      %lrw_b.twofish(k, Lw.cr.lrw.tweak(~M.CmBlock, ~CM.CrBlk128.of_octets, k2, i), p) : {Con{p, t} == Con{_, Lw.cr.lrw.dec(~Tf.LcTwofishKey, ~M.CmBlock, ~Tf.LcTwofish.decrypt, ~CM.CrBlk128.xor, ~CM.CrBlk128.of_octets, k, k2, Lw.cr.lrw.enc(~Tf.LcTwofishKey, ~M.CmBlock, ~Tf.LcTwofish.encrypt, ~CM.CrBlk128.xor, ~CM.CrBlk128.of_octets, k, k2, t, Lw.cr.lrw.inc(i)), Lw.cr.lrw.inc(i))} : List<&2, M.CmBlock>}
1167      %lrw_rt.twofish(k, k2, t, Lw.cr.lrw.inc(i)) : {Con{p, t} == Con{p, _} : List<&2, M.CmBlock>}
1168      {==}