def cbc_dec_ref

bend-osdev-cipher-core@0.1.0.0 · PROOF.bend:269

import Base
import bend-osdev-cipher-core@0.1.0.0/cipher_core.bend as L
import bend-osdev-cipher-core@0.1.0.0/modes64.bend as X

269def cbc_dec_ref(~K: Data, ~dec: K -> L.LcBlock64 -> L.LcBlock64, +k: K, bs: List<&2, L.LcBlock64>, +iv: L.LcBlock64, +acc: List<&2, L.LcBlock64>) -> {X.m64.cbc.dec.go(~K, ~dec, k, bs, iv, acc) == X.m64.rev_onto(acc, X.m64.cbc.dec(~K, ~dec, k, bs, iv)) : List<&2, L.LcBlock64>}:
270  match bs:
271    case Nil{}:
272      {==}
273    case Con{+c, t}:
274      cbc_dec_ref(~K, ~dec, k, t, c, Con{L.LcBlock64.xor(iv, dec(k, c)), acc})