#crypto.sha256
SHA-256 hashing of a byte string (FIPS 180-4).
A message is Bytes and so is the digest, 32 bytes, most significant byte
of each word first.
There is no incremental form. A message is hashed in one call.
#sha256AssumeByteDomainFrom
sha256AssumeByteDomainFrom : (U32, U32, U32, U32, U32, U32, U32, U32) -> Int -> Bytes -> Bytes
sha256AssumeByteDomainFrom priorState priorBytes msg#sha256FoldKeyBlock
sha256FoldKeyBlock : Bytes -> (U32, U32, U32, U32, U32, U32, U32, U32)
sha256FoldKeyBlock block#sha256
sha256 : Bytes -> Bytes
sha256 msgThe 32-byte SHA-256 digest of msg.