Check.round: def of bend-osdev-crypto@0.1.0.0
Import: import bend-osdev-crypto@0.1.0.0/check.bend as Check
Lines 163-169 of bend-osdev-crypto@0.1.0.0/check.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-crypto@0.1.0.0/check.bend&start_line=163&end_line=169

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

# the last 16 bytes of c, and whether d gave the message back
def round(+m: B.Octets, c: Result<&2, &2, Cr.CrError, B.Octets>, d: Result<&2, &2, Cr.CrError, B.Octets>) -> String:
  match c d:
    case Done{+x} Done{y}:
      ok_if(B.Octets.is_eq(y, m), B.Octets.drop(Nat.sub(B.Octets.len(x), 16n), x))
    case _ _:
      "failed"

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.sub
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  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.drop
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.is_eq
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.len
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/check.bend&name=ok_if
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/crypto.bend&name=CrError