.. index:: single: jwt_jwk .. _jwt_jwk/0:

.. rst-class:: right

object

jwt_jwk

JSON Web Key normalization and key material helpers.

| Availability: | logtalk_load(jwt(loader))

| Author: Paulo Moura | Version: 1:0:0 | Date: 2026-07-06

| Compilation flags: | static, context_switching_calls

| Imports: | public :ref:`jwt_helpers <jwt_helpers/0>` | Uses: | :ref:`jwt_der <jwt_der/0>`

| Remarks: | (none)

| Inherited public predicates: |  :ref:`options_protocol/0::check_option/1`  :ref:`options_protocol/0::check_options/1`  :ref:`options_protocol/0::default_option/1`  :ref:`options_protocol/0::default_options/1`  :ref:`options_protocol/0::option/2`  :ref:`options_protocol/0::option/3`  :ref:`options_protocol/0::valid_option/1`  :ref:`options_protocol/0::valid_options/1`  

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

Public predicates

.. index:: public_key_pem/2 .. _jwt_jwk/0::public_key_pem/2:

public_key_pem/2 ^^^^^^^^^^^^^^^^^^^^

Converts a supported JWK public key into PEM SubjectPublicKeyInfo text.

| Compilation flags: | static

| Template: | public_key_pem(Key,PEM) | Mode and number of proofs: | public_key_pem(+term,-atom) - one_or_error

| Exceptions: | Key is not a supported RSA or P-256 EC public JWK: | domain_error(jwt_jwk_public_key,Key) | Key contains Base64URL data with characters outside the Base64URL alphabet: | representation_error(base64)

---

.. index:: symmetric_key_bytes/2 .. _jwt_jwk/0::symmetric_key_bytes/2:

symmetric_key_bytes/2 ^^^^^^^^^^^^^^^^^^^^^^^^^

Extracts symmetric key bytes from an atom, byte wrapper, or octet JWK.

| Compilation flags: | static

| Template: | symmetric_key_bytes(Key,Bytes) | Mode and number of proofs: | symmetric_key_bytes(+term,-list(byte)) - one_or_error

| Exceptions: | Key is not an atom, byte wrapper, or octet JWK with Base64URL key material: | domain_error(jwt_symmetric_key,Key) | Key contains Base64URL data with characters outside the Base64URL alphabet: | representation_error(base64)

---

.. index:: compatible_key/2 .. _jwt_jwk/0::compatible_key/2:

compatible_key/2 ^^^^^^^^^^^^^^^^^^^^

Succeeds when a key is compatible with the requested JWT algorithm.

| Compilation flags: | static

| Template: | compatible_key(Key,Algorithm) | Mode and number of proofs: | compatible_key(+term,+atom) - zero_or_one

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Protected predicates

(no local declarations; see entity ancestors if any)

Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)