Twofish.tf.unop: def of bend-osdev-legacy-ciphers@0.1.0.0
Import: import bend-osdev-legacy-ciphers@0.1.0.0/twofish.bend as Twofish
Lines 204-221 of bend-osdev-legacy-ciphers@0.1.0.0/twofish.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/twofish.bend&start_line=204&end_line=221

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

# the step undone
def tf.unop(o: LcTfOp, s: M.CmBlock) -> M.CmBlock:
  match o:
    case LcTfBswap{}:
      match s:
        case M.CmBlock{a, b, c, d}:
          M.CmBlock{L.lc.bswap.bits(a), L.lc.bswap.bits(b), L.lc.bswap.bits(c), L.lc.bswap.bits(d)}
    case LcTfWhite{k}:
      M.CmBlock.xor(s, k)
    case LcTfRound{tb, sk, ka, kb}:
      match s:
        case M.CmBlock{a, b, +c, +d}:
          +f = tf.f(tb, sk, c, d, ka, kb)
          M.CmBlock{c, d, U32.xor(L.lc.rotl1.bits(a), tf.f0(f)), L.lc.rotl31.bits(U32.xor(b, tf.f1(f)))}
    case LcTfSwap{}:
      match s:
        case M.CmBlock{a, b, c, d}:
          M.CmBlock{c, d, a, b}

Uses (10):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.xor
  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-cipher-modes@0.1.0.0/cipher_modes.bend&name=CmBlock.xor
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/legacy_ciphers.bend&name=lc.bswap.bits
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/legacy_ciphers.bend&name=lc.rotl1.bits
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/legacy_ciphers.bend&name=lc.rotl31.bits
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/twofish.bend&name=LcTfOp
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/twofish.bend&name=tf.f
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/twofish.bend&name=tf.f0
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/twofish.bend&name=tf.f1