def sp_lt3

bend-osdev-legacy-ciphers@0.1.0.0 · PROOF.bend:1196

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/serpent.bend as P

1196def sp_lt3(s: M.CmBlock) -> {s == P.sp.lt3(P.sp.lt3(s)) : M.CmBlock}:
1197  match s:
1198    case M.CmBlock{+x0, +x1, +x2, +x3}:
1199      %u32_xx(x1, U32.xor(x0, x2)) : {M.CmBlock{x0, x1, x2, x3} == M.CmBlock{x0, _, x2, x3} : M.CmBlock}
1200      {==}