def ccmp.len_ctrb

bend-osdev-cipher-modes@0.1.0.0 · PROOF.bend:1765

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/ccm.bend as CC

1765def ccmp.len_ctrb(~K: Data, ~enc: K -> M.CmBlock -> M.CmBlock, +k: K, bs: List<&2, M.CmBlock>, +a0: M.CmBlock, +i: U32) -> {List.length(&2, M.CmBlock, CC.ccm.ctrb(~K, ~enc, k, bs, a0, i)) == List.length(&2, M.CmBlock, bs) : Nat}:
1766  match bs:
1767    case Nil{}:
1768      {==}
1769    case Con{+b, +rest}:
1770      %ccmp.len_ctrb(~K, ~enc, k, rest, a0, U32.add(i, 1)) : {1n+List.length(&2, M.CmBlock, CC.ccm.ctrb(~K, ~enc, k, rest, a0, U32.add(i, 1))) == 1n+_ : Nat}
1771      {==}