Enum DkimKey 

pub enum DkimKey {
    Rsa(RsaKey<Sha256>),
    Ed25519(Ed25519Key),
    MlDsa44Ed25519(Box<MlDsa44Ed25519Key>),
}

A concrete DKIM signing key, holding an RSA, an Ed25519 or an ML-DSA-44/Ed25519 composite key.

Lets a single signer type hold keys of any algorithm. Dkim2Signer requires it. Every key type converts into it with From. The composite variant is defined for DKIM2 only; the DKIM and ARC signers reject it.

Variants

Rsa(RsaKey<Sha256>)

An RSA key producing rsa-sha256 signatures.

Ed25519(Ed25519Key)

An Ed25519 key producing ed25519-sha256 signatures (RFC 8463).

MlDsa44Ed25519(Box<MlDsa44Ed25519Key>)

An ML-DSA-44/Ed25519 composite key producing mldsa44-ed25519-sha512 signatures (DKIM2 only).

Trait Implementations

impl From<Ed25519Key> for DkimKey

Available on crate features aws-lc-rs or rust-crypto only.

fn from(key: Ed25519Key) -> Self

Converts to this type from the input type.

impl From<MlDsa44Ed25519Key> for DkimKey

Available on crate features aws-lc-rs or rust-crypto only.

fn from(key: MlDsa44Ed25519Key) -> Self

Converts to this type from the input type.

impl From<RsaKey<Sha256>> for DkimKey

Available on crate features aws-lc-rs or rust-crypto only.

fn from(key: RsaKey<Sha256>) -> Self

Converts to this type from the input type.

impl SigningKey for DkimKey

Available on crate features aws-lc-rs or rust-crypto only.

type Hasher = Sha256

The hash function used by the signature algorithm.

fn sign(&self, input: impl Writable) -> Result<Vec<u8>>

Signs the bytes written by input and returns the raw signature.

fn algorithm(&self) -> Algorithm

Returns the signature algorithm written to the a= tag.

fn heap_size(&self) -> usize

Approximate heap memory owned by the key, in bytes, for weighing cache entries that hold it.

fn hash(&self, data: impl Writable) -> HashOutput

Hashes the bytes written by data with Self::Hasher.