Enum DigestAlgorithm 

#[non_exhaustive]
pub enum DigestAlgorithm {
    Sha256,
    Sha512,
}

A hash algorithm registered with the IANA Hash Algorithm Names registry and accepted by RFC 9530 Content-Digest.

Only the algorithms the Fediverse actually uses today are enumerated; future algorithms can be added without breaking the wire format because the variant set is #[non_exhaustive].

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Sha256

SHA-256 — universally supported by today’s Fediverse.

Sha512

SHA-512 — emitted by Mitra and Takahē, accepted by Mastodon 4.5+.

Implementations

impl DigestAlgorithm

pub const fn token(self) -> &'static str

IANA-registered token used as the dictionary key in the wire header.

pub fn hash(self, body: &[u8]) -> Vec<u8>

Computes the digest bytes of body under this algorithm.

pub const fn from_token(token: &str) -> Option<Self>

Parses the IANA token into an algorithm variant. Returns None for tokens this crate does not recognise.

RFC 9530 mandates the lowercase canonical form on the wire, but real-world senders occasionally emit SHA-256; we follow Postel’s law and accept any ASCII casing on the read side while still emitting the canonical form.

Trait Implementations

impl Clone for DigestAlgorithm

fn clone(&self) -> DigestAlgorithm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DigestAlgorithm

impl Debug for DigestAlgorithm

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

Formats the value using the given formatter.

impl Eq for DigestAlgorithm

impl Hash for DigestAlgorithm

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 DigestAlgorithm

fn eq(&self, other: &DigestAlgorithm) -> 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 StructuralPartialEq for DigestAlgorithm