PROOF.sp_lt5: def of bend-osdev-legacy-ciphers@0.1.0.0
Import: import bend-osdev-legacy-ciphers@0.1.0.0/PROOF.bend as PROOF
Lines 1208-1213 of bend-osdev-legacy-ciphers@0.1.0.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/PROOF.bend&start_line=1208&end_line=1213

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/legacy_ciphers.bend as L
import bend-osdev-legacy-ciphers@0.1.0.0/serpent.bend as P

def sp_lt5(s: M.CmBlock) -> {s == P.sp.ilt5(P.sp.lt5(s)) : M.CmBlock}:
  match s:
    case M.CmBlock{+x0, +x1, +x2, +x3}:
      %rot_31_1(x1) : {M.CmBlock{x0, x1, x2, x3} == M.CmBlock{x0, _, x2, L.lc.rotl25.bits(L.lc.rotl7.bits(x3))} : M.CmBlock}
      %rot_25_7(x3) : {M.CmBlock{x0, x1, x2, x3} == M.CmBlock{x0, x1, x2, _} : M.CmBlock}
      {==}

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend&name=CmBlock
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/PROOF.bend&name=rot_25_7
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/PROOF.bend&name=rot_31_1
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/legacy_ciphers.bend&name=lc.rotl25.bits
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/legacy_ciphers.bend&name=lc.rotl7.bits
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/serpent.bend&name=sp.ilt5
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/serpent.bend&name=sp.lt5