Integrate NaCl and implement wrbt peering

[benhylau]

No description provided.

[benhylau]

This is for Android using com.github.gerardsoleca:robosodium:1.0.0:

// Alice sends peering request.
KeyPair aliceKeyPair = new KeyPair();
byte[] aliceSk = aliceKeyPair.getPrivateKey().toBytes();
byte[] alicePk = aliceKeyPair.getPublicKey().toBytes();

// Bob responds with peering offer.
String bobCjdnsSk = "yourCjdnsPrivateKey";
String bobOffer = "credentials";
String nonce = "121212121212121212121212"; // TODO Figure out how to generate

KeyPair bobKeyPair = new KeyPair(bobCjdnsSk, Encoder.HEX);
byte[] bobSk = bobKeyPair.getPrivateKey().toBytes();
byte[] bobPk = bobKeyPair.getPublicKey().toBytes();

Box bobBox = new Box(alicePk, bobSk);
byte[] encryptedBundle = bobBox.encrypt(nonce.getBytes(), bobOffer.getBytes());
Log.d(LOG_TAG, "Encrypted: " + new String(encryptedBundle));

// Alice verifies offer.
Box aliceBox = new Box(bobPk, aliceSk);
byte[] decryptedBundle = aliceBox.decrypt(nonce.getBytes(), encryptedBundle);
Log.d(LOG_TAG, "Decrypted: " + new String(decryptedBundle));

@amardeshbd The wrbt protocol will need some altering now that the signing is done as part of the Box encryption process.

@PeterChu2 You can use the cjdns private key to make a Box for signing, just need to specify the HEX encoding. See above.

[ghost]

/ip4/1.2.3.4/udp/54321/cjdns/thepublickey.k/pwd/thepassword
/ip4/1.2.3.4/udp/54321/cjdns/thepublickey.k/pwd/thepassword/login/thelogin