LAWS.hkdf_sha256_too_long: law of bend-osdev-crypto@0.1.0.0
Import: import bend-osdev-crypto@0.1.0.0/LAWS.bend as LAWS
Lines 460-462 of bend-osdev-crypto@0.1.0.0/LAWS.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-crypto@0.1.0.0/LAWS.bend&start_line=460&end_line=462

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
import bend-osdev-crypto@0.1.0.0/hkdf.bend as Hk
import bend-osdev-crypto@0.1.0.0/inst_sha2.bend as SH

# HKDF over SHA-256 refuses more than 255 digests (8160 bytes)
law hkdf_sha256_too_long:
  {Result.map(&2, &2, Cr.CrError, B.Octets, Unit, o => Unit{}, Hk.CrHkdf.derive(~64n, ~32n, ~SH.CrSha2.sha256, B.Octets.of_string("ikm"), B.Octets.empty(), B.Octets.empty(), 8161n)) == Fail{Cr.CrBadOutputLength{8161n}} : Result<&2, &2, Cr.CrError, Unit>}

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result.map
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit
  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.empty
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.of_string
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/crypto.bend&name=CrError
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/hkdf.bend&name=CrHkdf.derive
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-crypto@0.1.0.0/inst_sha2.bend&name=CrSha2.sha256