def fe_unstep_step

bend-osdev-cipher-core@0.1.0.0 · PROOF.bend:76

import Base
import bend-osdev-cipher-core@0.1.0.0/cipher_core.bend as L

76def fe_unstep_step(~RK: Data, ~f: RK -> U32 -> U32, +k: RK, b: L.LcBlock64) -> {b == L.lc.fe.unstep(~RK, ~f, k, L.lc.fe.step(~RK, ~f, k, b)) : L.LcBlock64}:
77  match b:
78    case L.LcBlock64{l, +r}:
79      %u32_xx(l, f(k, r)) : {L.LcBlock64{l, r} == L.LcBlock64{_, r} : L.LcBlock64}
80      {==}