Struct EcdhKeypair 

pub struct EcdhKeypair { /* private fields */ }

A freshly generated X25519 keypair for the ECDH handshake.

The secret is zeroized on drop. Keep the secret on the side that generated it and send only the EcdhKeypair::public bytes to the peer.

Implementations

impl EcdhKeypair

pub fn generate() -> Result<Self, ProtocolError>

Generates a random X25519 keypair using the platform CSPRNG.

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

Returns the 32-byte public key that should be sent to the peer.

pub fn derive_session_key(&self, peer_public: &[u8; 32]) -> [u8; 32]

Derives the 32-byte ChaCha20-Poly1305 session key from the peer’s 32-byte public key.

peer_public must be exactly 32 bytes received from the other side.