def cr.pcbc.dec.go

bend-osdev-crypto@0.1.0.0 · pcbc.bend:47

import Base
import bend-osdev-crypto@0.1.0.0/modes.bend as Md

47def cr.pcbc.dec.go(~K: Data, ~Blk: Data, ~dec: K -> Blk -> Blk, ~bxor: Blk -> Blk -> Blk, +k: K, bs: List<&2, Blk>, v: Blk, acc: List<&2, Blk>) -> List<&2, Blk>:
48  match bs:
49    case Nil{}:
50      Md.cr.blks.rev_onto(~Blk, acc, Nil{})
51    case Con{+c, t}:
52      +p = bxor(dec(k, c), v)
53      cr.pcbc.dec.go(~K, ~Blk, ~dec, ~bxor, k, t, bxor(p, c), Con{p, acc})