law incremental256

bend-collections-laws-crypto@1.0.0.0 · proofs/crypto/hash/incremental.bend:268

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/sha/core.bend as C256
import bend-collections-laws-crypto@1.0.0.0/src/crypto/sha/sha256.bend as SHA256
import bend-collections-laws-crypto@1.0.0.0/src/crypto/hash.bend as H

268# digest(update_all(new, chunks)) is the padded block loop over concat(chunks).
269law incremental256:
270  for +cs: List<&2, List<&2, U32>>
271  {H.digest(H.update_all(H.new_sha256(), cs)) == SHA256.digest_bytes(C256.digest(C256.block_bytes(List.append(&2, U32, List.concat(&2, U32, cs), C256.suffix(List.length(&2, U32, List.concat(&2, U32, cs)))), 48n, C256.round_constants(), C256.initial()))) : List<&2, U32>}