def rc4_after_append

bend-osdev-legacy-ciphers@0.1.0.0 · PROOF.bend:8476

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B
import bend-osdev-legacy-ciphers@0.1.0.0/rc4.bend as R

8476def rc4_after_append(xs: List<&2, U32>, +ys: List<&2, U32>, +st: R.LcRc4State) -> {R.rc4.after(B.append(xs, ys), st) == R.rc4.after(ys, R.rc4.after(xs, st)) : R.LcRc4State}:
8477  match xs:
8478    case Nil{}:
8479      {==}
8480    case Con{x, t}:
8481      rc4_after_append(t, ys, R.rc4.step.st(R.rc4.next(st)))