Enum Algorithm 

pub enum Algorithm {
    EdDSA,
}

Sealed JWS signature algorithm whitelist (Phase 7 §6.8 — structural M51/M52/M54).

Only EdDSA exists. Consumer attempts to construct Algorithm::HS256 or any other variant fail at compile time (variant not found), making M51/M52/M54 enforcement structural rather than lint-based. jsonwebtoken::Algorithm is no longer re-exported — crates/shared/ppoppo-token owns the algorithm vocabulary.

Adding a new variant (e.g., for OIDC interop in Phase 10) is a deliberate spec change — the matrix M02/M06 rows must be revisited and the negative regression in tests/jwt_negative.rs reinstated to cover the cfg-vs-header SSOT invariant.

Variants

EdDSA

EdDSA over Ed25519 — RFC 9068 access-token profile.

Trait Implementations

impl Clone for Algorithm

fn clone(&self) -> Algorithm

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Algorithm

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FromStr for Algorithm

fn from_str(s: &str) -> Result<Self, Self::Err>

Parse the alg header field. Anything other than "EdDSA" is rejected — family-level rejections (HS/RS/ES) fire earlier in check_algorithm::run to give audit logs the family signal.

type Err = ()

The associated error which can be returned from parsing.

impl Hash for Algorithm

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Algorithm

fn eq(&self, other: &Algorithm) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Algorithm

impl Eq for Algorithm

impl StructuralPartialEq for Algorithm