Module keyexchange 

X25519 key exchange for secure P2P communication.

This module provides Diffie-Hellman key exchange using the X25519 elliptic curve, enabling peers in the CHIE network to establish secure encrypted channels.

Features

• X25519 Diffie-Hellman key exchange
• Ephemeral and static key support
• Shared secret derivation with HKDF
• Key serialization for network transmission

Example

use chie_crypto::keyexchange::{KeyExchange, KeyExchangeKeypair};

// Alice generates a keypair
let alice = KeyExchangeKeypair::generate();
// Bob generates a keypair
let bob = KeyExchangeKeypair::generate();

// Exchange public keys and derive shared secret
let alice_shared = alice.exchange(bob.public_key());
let bob_shared = bob.exchange(alice.public_key());

// Both parties now have the same shared secret
assert_eq!(alice_shared.as_bytes(), bob_shared.as_bytes());

Structs

KeyExchangeKeypair

Key exchange keypair for X25519 Diffie-Hellman.

SharedSecret

Shared secret derived from key exchange (32 bytes).

Enums

KeyExchangeError

Errors that can occur during key exchange operations.

Traits

KeyExchange

Key exchange trait for performing Diffie-Hellman.

Functions

ephemeral_keypair

Create an ephemeral keypair for one-time key exchange.

exchange_and_derive

Perform a complete key exchange and derive an encryption key.

Type Aliases

KeyExchangeResult