Laws.chacha20_block.invalid: law of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/chacha/laws.bend as Laws
Lines 61-66 of bend-collections-laws-crypto@1.0.0.0/proofs/crypto/chacha/laws.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/chacha/laws.bend&start_line=61&end_line=66

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/chacha/chacha20.bend as I

law chacha20_block.invalid:
  for +key: List<&2, U32>
  for +counter: U32
  for +nonce: List<&2, U32>
  for +h: {Bool.and(Nat.is_eq(List.length(&2, U32, key), 32n), Nat.is_eq(List.length(&2, U32, nonce), 12n)) == False{} : Bool}
  {I.chacha20_block(key, counter, nonce) == None{} : Maybe<&2, List<&2, U32>>}

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.length
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/chacha/proof.bend&name=when_false
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/chacha/chacha20.bend&name=block_rounds
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/chacha/chacha20.bend&name=chacha20_block
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/chacha/chacha20.bend&name=valid