def lrw_rt.cast6

bend-osdev-crypto@0.1.0.0 · PROOF.bend:1313

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
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

1313def lrw_rt.cast6(+k: C6.LcCast6Key, +k2: G.Gf128, bs: List<&2, M.CmBlock>, +i: G.Gf128) -> {bs == Lw.cr.lrw.dec(~C6.LcCast6Key, ~M.CmBlock, ~C6.LcCast6.decrypt, ~CM.CrBlk128.xor, ~CM.CrBlk128.of_octets, k, k2, Lw.cr.lrw.enc(~C6.LcCast6Key, ~M.CmBlock, ~C6.LcCast6.encrypt, ~CM.CrBlk128.xor, ~CM.CrBlk128.of_octets, k, k2, bs, i), i) : List<&2, M.CmBlock>}:
1314  match bs:
1315    case Nil{}:
1316      {==}
1317    case Con{+p, t}:
1318      %lrw_b.cast6(k, Lw.cr.lrw.tweak(~M.CmBlock, ~CM.CrBlk128.of_octets, k2, i), p) : {Con{p, t} == Con{_, Lw.cr.lrw.dec(~C6.LcCast6Key, ~M.CmBlock, ~C6.LcCast6.decrypt, ~CM.CrBlk128.xor, ~CM.CrBlk128.of_octets, k, k2, Lw.cr.lrw.enc(~C6.LcCast6Key, ~M.CmBlock, ~C6.LcCast6.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>}
1319      %lrw_rt.cast6(k, k2, t, Lw.cr.lrw.inc(i)) : {Con{p, t} == Con{p, _} : List<&2, M.CmBlock>}
1320      {==}