Struct DhKem

struct DhKem<const KDF_SIZE: usize> {
    id: HpkeKem,
    agreement_algorithm: &'static Algorithm,
    key_generator: &'static (dyn Fn() -> Result<(HpkePublicKey, HpkePrivateKey), Error> + Send + Sync),
    hkdf: &'static dyn HkdfPrkExtract,
}

A Diffie-Hellman (DH) based Key Encapsulation Mechanism (KEM).

See RFC 9180 §4.1 “DH-Based KEM (DHKEM)”.

Fields

id: HpkeKem

agreement_algorithm: &'static Algorithm

key_generator: &'static (dyn Fn() -> Result<(HpkePublicKey, HpkePrivateKey), Error> + Send + Sync)

hkdf: &'static dyn HkdfPrkExtract

Implementations

impl<const KDF_SIZE: usize> DhKem<KDF_SIZE>

fn encap( &self, recipient: &HpkePublicKey, ) -> Result<(KemSharedSecret<KDF_SIZE>, EncapsulatedSecret), Error>

See RFC 9180 §4.1 “DH-Based KEM (DHKEM)”.

fn encap_impl( &self, recipient: &HpkePublicKey, sk_e: PrivateKey, ) -> Result<(KemSharedSecret<KDF_SIZE>, EncapsulatedSecret), Error>

fn decap( &self, enc: &EncapsulatedSecret, recipient: &HpkePrivateKey, ) -> Result<KemSharedSecret<KDF_SIZE>, Error>

See RFC 9180 §4.1 “DH-Based KEM (DHKEM)”.

fn extract_and_expand(&self, dh: &[u8], kem_context: &[u8]) -> [u8; KDF_SIZE]

See RFC 9180 §4.1 “DH-Based KEM (DHKEM)”.