Hmac.hmac_len: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/mac/hmac.bend as Hmac
Lines 90-92 of bend-collections-laws-crypto@1.0.0.0/proofs/crypto/mac/hmac.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/mac/hmac.bend&start_line=90&end_line=92

import Base
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/hmac.bend as Spec

# Every tag is 32 bytes.
def hmac_len(+key: List<&2, U32>, +msg: List<&2, U32>) -> {List.length(&2, U32, Spec.hmac(key, msg)) == 32n : Nat}:
  fips_len(outer(key, msg))

Uses (7):
  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=fips_len
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/mac/hmac.bend&name=outer
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/hmac.bend&name=hmac