LAWS.bend source

LAWS.bend on the hub · documented module

import Baseimport ./sha256.bend as Runtimeimport ./buffer.bend as Bufferimport ./legacy_model.bend as SHAimport ./fips.bend as FIPSimport ./packed_spec.bend as PackedSpec# These claims mention the actual public API and the complete independent spec.# There are no arbitrary preprocessing functions, tables, or correctness premises.law constants_correct:  {SHA.constants() == FIPS.constants() : List<&2, U32>}law sha256_correct:  for +bytes: List<&2, U32>  {SHA.sha256(bytes) == FIPS.sha256(bytes) : List<&2, U32>}law digest_bytes_correct:  for +ws: List<&2, U32>  {SHA.digest_bytes(ws) == FIPS.digest_octets(ws) : List<&2, U32>}law sha256_bytes_correct:  for +bytes: List<&2, U32>  {SHA.sha256_bytes(bytes) == FIPS.sha256_bytes(bytes) : List<&2, U32>}law sha256_bytes_length:  for +bytes: List<&2, U32>  {List.length(&2, U32, SHA.sha256_bytes(bytes)) == 32n : Nat}# A separate packed-format contract; the original list-to-FIPS theorem is unchanged.law sha256_packed_correct:  for words: Array<U32>  for +byte_length: Nat  {SHA.sha256_packed(words,byte_length) == PackedSpec.sha256(words,byte_length) : Maybe<&2,List<&2,U32>>}# Actual production array API; historical list laws above concern only its model.law sha256_array_correct:  for words: Array<U32>  for +byte_length: Nat  {Runtime.sha256(words,byte_length) == Buffer.result(PackedSpec.hash(words,byte_length)) : Maybe<&1,Array<U32>>}