Sm4.sm4.tau: def of bend-osdev-legacy-ciphers@0.1.0.0
Import: import bend-osdev-legacy-ciphers@0.1.0.0/sm4.bend as Sm4
Lines 44-46 of bend-osdev-legacy-ciphers@0.1.0.0/sm4.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/sm4.bend&start_line=44&end_line=46

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

# tau: the S-box on each byte of a word
def sm4.tau(+tab: L.LcTab, +a: U32) -> U32:
  L.lc.be(sm4.s(tab, a, 3n), sm4.s(tab, a, 2n), sm4.s(tab, a, 1n), sm4.s(tab, a, 0n))

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/legacy_ciphers.bend&name=LcTab
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/legacy_ciphers.bend&name=lc.be
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-legacy-ciphers@0.1.0.0/sm4.bend&name=sm4.s