Struct StaticKeyExchange 

pub struct StaticKeyExchange { /* private fields */ }

X25519 key exchange with a static (reusable) secret

Unlike KeyExchange which uses ephemeral secrets that can only be used once, this struct uses a static secret that can be reused for multiple key derivations.

Implementations

impl StaticKeyExchange

pub fn new() -> Self

Generate a new key exchange pair

pub fn from_secret(secret_bytes: [u8; 32]) -> Self

Create from existing secret bytes

pub fn public_key_bytes(&self) -> [u8; 32]

Get our public key bytes

pub fn public_key_base64(&self) -> String

Get our public key as base64

pub fn derive_shared_secret(&self, peer_public_key: &[u8; 32]) -> [u8; 32]

Derive shared secret from peer’s public key This can be called multiple times (unlike ephemeral key exchange)

pub fn derive_relay_encryption_key( &self, peer_public_key: &[u8; 32], ) -> Result<[u8; 32]>

Derive a relay-compatible encryption key from peer’s public key This performs X25519 ECDH followed by HKDF key derivation

Trait Implementations

impl Debug for StaticKeyExchange

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

Formats the value using the given formatter.

impl Default for StaticKeyExchange

fn default() -> Self

Returns the “default value” for a type.