def li.len_enc

bend-osdev-cipher-modes@0.1.0.0 · PROOF.bend:1463

import Base
import bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend as M
import bend-osdev-cipher-modes@0.1.0.0/xts.bend as T

1463def li.len_enc(~K: Data, ~enc: K -> M.CmBlock -> M.CmBlock, +k: K, bs: List<&2, M.CmBlock>, +t: M.CmBlock) -> {List.length(&2, M.CmBlock, T.xts.enc(~K, ~enc, k, bs, t)) == List.length(&2, M.CmBlock, bs) : Nat}:
1464  match bs:
1465    case Nil{}:
1466      {==}
1467    case Con{+p, +rest}:
1468      %li.len_enc(~K, ~enc, k, rest, T.Xts.mul_alpha(t)) : {1n+List.length(&2, M.CmBlock, T.xts.enc(~K, ~enc, k, rest, T.Xts.mul_alpha(t))) == 1n+_ : Nat}
1469      {==}