Kbkdf.cr.kb.ctr: def of bend-osdev-crypto@0.1.0.0
Import: import bend-osdev-crypto@0.1.0.0/kbkdf.bend as Kbkdf
Lines 47-59 of bend-osdev-crypto@0.1.0.0/kbkdf.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-crypto@0.1.0.0/kbkdf.bend&start_line=47&end_line=59

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B

# n more bytes in counter mode: the rest of the current block cur, then
# PRF(K_IN, [i + 1]_2 || fixed), ...
def cr.kb.ctr(~K: Data, ~compute: K -> B.Octets -> B.Octets, n: Nat, cur: List<&2, U32>, +k: K, +rlen: Nat, +fixed: B.Octets, +i: U32) -> List<&2, U32>:
  match n:
    case 0n:
      Nil{}
    case 1n+p:
      match cur:
        case Con{h, t}:
          Con{h, cr.kb.ctr(~K, ~compute, p, t, k, rlen, fixed, i)}
        case Nil{}:
          +blk = B.Octets.to_list(compute(k, B.Octets.append(CrKbkdf.counter(rlen, U32.add(i, 1)), fixed)))
          Con{cr.kb.head(blk), cr.kb.ctr(~K, ~compute, p, cr.kb.tail(blk), k, rlen, fixed, U32.add(i, 1))}

Uses (10):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.append
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.to_list
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/kbkdf.bend&name=CrKbkdf.counter
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/kbkdf.bend&name=cr.kb.head
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/kbkdf.bend&name=cr.kb.tail