.. index:: single: hash_digest_protocol .. _hash_digest_protocol/0:

.. rst-class:: right

protocol

hash_digest_protocol

Protocol for fixed-size cryptographic hash functions exposing raw digests and digest metadata.

| Availability: | logtalk_load(hashes(loader))

| Author: Paulo Moura | Version: 1:0:0 | Date: 2026-04-16

| Compilation flags: | static

| Extends: | public :ref:`hash_protocol <hash_protocol/0>`

| Remarks: | (none)

| Inherited public predicates: |  :ref:`hash_protocol/0::hash/2`  

.. contents:: :local: :backlinks: top

Public predicates

.. index:: digest/2 .. _hash_digest_protocol/0::digest/2:

digest/2 ^^^^^^^^^^^^

Computes the digest for a list of bytes and returns it as a list of bytes.

| Compilation flags: | static

| Template: | digest(Bytes,Digest) | Mode and number of proofs: | digest(+list(byte),--list(byte)) - one

---

.. index:: digest_size/1 .. _hash_digest_protocol/0::digest_size/1:

digest_size/1 ^^^^^^^^^^^^^^^^^

Returns the digest size in bytes.

| Compilation flags: | static

| Template: | digest_size(DigestSize) | Mode and number of proofs: | digest_size(--integer) - one

---

.. index:: block_size/1 .. _hash_digest_protocol/0::block_size/1:

block_size/1 ^^^^^^^^^^^^^^^^

Returns the hash block size in bytes.

| Compilation flags: | static

| Template: | block_size(BlockSize) | Mode and number of proofs: | block_size(--integer) - one

---

Protected predicates

(no local declarations; see entity ancestors if any)

Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)