Laws.Sign.length: law of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/mac/laws.bend as Laws
Lines 15-19 of bend-collections-laws-crypto@1.0.0.0/proofs/crypto/mac/laws.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/mac/laws.bend&start_line=15&end_line=19

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/mac.bend as MAC

# Every tag is 32 bytes.
law Sign.length:
  for +key: List<&2, U32>
  for +msg: List<&2, U32>
  {List.length(&2, U32, MAC.sign(key, msg)) == 32n : Nat}

Uses (6):
  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=Nat
  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/mac/hmac.bend&name=sign_len
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/mac.bend&name=sign