Des.des.unstep: def of bend-osdev-legacy-ciphers@0.1.0.0
Import: import bend-osdev-legacy-ciphers@0.1.0.0/des.bend as Des
Lines 252-256 of bend-osdev-legacy-ciphers@0.1.0.0/des.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/des.bend&start_line=252&end_line=256

import Base

# the round undone
def des.unstep(k: LcDesRk, h: LcDesHalves) -> LcDesHalves:
  match h:
    case LcDesHalves{+a, b}:
      LcDesHalves{U32.xor(b, des.f(k, a)), a}

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.xor
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/des.bend&name=LcDesHalves
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/des.bend&name=LcDesRk
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/des.bend&name=des.f