cell/examples/seif_client.js

// Seif Handshake Client Example
// Implements the Seif Protocol handshake client side

var crypto = use('crypto');
var json = use('json');
var io = use('io');

// Alice's key pair
var alice_keys = crypto.keypair();
console.log("Alice public key:", alice_keys.public);
console.log("Alice private key:", alice_keys.private);

// Bob's public key (in real usage, this would be obtained separately)
// For this example, we'll use a hardcoded key or read from file
var bob_public_key = null;

// Try to read Bob's public key from file if it exists
if (io.exists('bob_public.key')) {
  bob_public_key = io.slurp('bob_public.key').trim();
  console.log("Loaded Bob's public key from file:", bob_public_key);
} else {
  // For testing, use the server's public key printed by seif_server.js
  console.log("Please create bob_public.key with the server's public key");
  console.log("Run seif_server.js first to get the public key");
  return;
}

// Generate random handshake key
var handshake_key = crypto.keypair().public; // Using public key as random 32-byte value
console.log("Generated handshake key:", handshake_key);

console.log("Sending handshake to server...");

// Contact the server
$_.contact((actor, reason) => {
  if (!actor) {
    console.error("Could not establish connection:", reason);
    return;
  }
}, {
  address: "localhost",
  port: 5678,
  seif: 1,
  handshake: crypto.encrypt_pk(bob_public_key, handshake_key),
  payload: crypto.encrypt(handshake_key, alice_keys.public)
});

$_.receiver(e => {
  console.log("Received message:", e);
});