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device.js
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device.js
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/*jslint node: true */
"use strict";
var crypto = require('crypto');
var async = require('async');
var ecdsa = require('secp256k1');
var db = require('./db.js');
var mutex = require('./mutex.js');
var objectHash = require('./object_hash.js');
var ecdsaSig = require('./signature.js');
var network = require('./network.js');
var eventBus = require('./event_bus.js');
var ValidationUtils = require("./validation_utils.js");
var conf = require('./conf.js');
var breadcrumbs = require('./breadcrumbs.js');
var SEND_RETRY_PERIOD = 60*1000;
var RECONNECT_TO_HUB_PERIOD = 60*1000;
var TEMP_DEVICE_KEY_ROTATION_PERIOD = 3600*1000;
var my_device_hub;
var my_device_name;
var my_device_address;
var objMyPermanentDeviceKey;
var objMyTempDeviceKey;
var objMyPrevTempDeviceKey;
var saveTempKeys; // function that saves temp keys
var bScheduledTempDeviceKeyRotation = false;
function getMyDevicePubKey(){
if (!objMyPermanentDeviceKey || !objMyPermanentDeviceKey.pub_b64)
throw Error('my device pubkey not defined');
return objMyPermanentDeviceKey.pub_b64;
}
function getMyDeviceAddress(){
if (!my_device_address)
throw Error('my_device_address not defined');
if (typeof window !== 'undefined' && window && window.cordova)
checkDeviceAddress();
return my_device_address;
}
function setDevicePrivateKey(priv_key){
breadcrumbs.add("setDevicePrivateKey");
var bChanged = (!objMyPermanentDeviceKey || priv_key !== objMyPermanentDeviceKey.priv);
objMyPermanentDeviceKey = {
priv: priv_key,
pub_b64: ecdsa.publicKeyCreate(priv_key, true).toString('base64')
};
var new_my_device_address = objectHash.getDeviceAddress(objMyPermanentDeviceKey.pub_b64);
if (my_device_address && my_device_address !== new_my_device_address){
breadcrumbs.add('different device address: old '+my_device_address+', new '+new_my_device_address);
throw Error('different device address: old '+my_device_address+', new '+new_my_device_address);
}
breadcrumbs.add("same device addresses: "+new_my_device_address);
my_device_address = new_my_device_address;
// this temp pubkey package signs my permanent key and is actually used only if I'm my own hub.
// In this case, there are no intermediaries and TLS already provides perfect forward security
network.setMyDeviceProps(my_device_address, createTempPubkeyPackage(objMyPermanentDeviceKey.pub_b64));
if (bChanged)
loginToHub();
}
function checkDeviceAddress(){
if (!objMyPermanentDeviceKey)
return;
var derived_my_device_address = objectHash.getDeviceAddress(objMyPermanentDeviceKey.pub_b64);
if (my_device_address !== derived_my_device_address){
breadcrumbs.add('different device address: old '+my_device_address+', derived '+derived_my_device_address);
throw Error('different device address: old '+my_device_address+', derived '+derived_my_device_address);
}
}
function setTempKeys(temp_priv_key, prev_temp_priv_key, fnSaveTempKeys){
// console.log("setTempKeys", temp_priv_key, prev_temp_priv_key);
objMyTempDeviceKey = {
use_count: null, // unknown
priv: temp_priv_key,
pub_b64: ecdsa.publicKeyCreate(temp_priv_key, true).toString('base64')
};
if (prev_temp_priv_key) // may be null
objMyPrevTempDeviceKey = {
priv: prev_temp_priv_key,
pub_b64: ecdsa.publicKeyCreate(prev_temp_priv_key, true).toString('base64')
};
saveTempKeys = fnSaveTempKeys;
loginToHub();
}
function setDeviceAddress(device_address){
breadcrumbs.add("setDeviceAddress: " + device_address);
if (my_device_address && my_device_address !== device_address)
throw Error('different device address');
my_device_address = device_address;
}
function setNewDeviceAddress(device_address){
breadcrumbs.add("setNewDeviceAddress: " + device_address);
my_device_address = device_address;
}
function setDeviceName(device_name){
console.log("setDeviceName", device_name);
my_device_name = device_name;
}
function setDeviceHub(device_hub){
console.log("setDeviceHub", device_hub);
var bChanged = (device_hub !== my_device_hub);
my_device_hub = device_hub;
if (bChanged){
network.addPeer(conf.WS_PROTOCOL+device_hub);
loginToHub();
}
}
function isValidPubKey(b64_pubkey){
return ecdsa.publicKeyVerify(new Buffer(b64_pubkey, 'base64'));
}
// -------------------------
// logging in to hub
function handleChallenge(ws, challenge){
console.log('handleChallenge');
if (ws.bLoggingIn)
sendLoginCommand(ws, challenge);
else // save for future login
ws.received_challenge = challenge;
}
function loginToHub(){
if (!objMyPermanentDeviceKey)
return console.log("objMyPermanentDeviceKey not set yet, can't log in");
if (!objMyTempDeviceKey)
return console.log("objMyTempDeviceKey not set yet, can't log in");
if (!my_device_hub)
return console.log("my_device_hub not set yet, can't log in");
console.log("logging in to hub "+my_device_hub);
network.findOutboundPeerOrConnect(conf.WS_PROTOCOL+my_device_hub, function onLocatedHubForLogin(err, ws){
if (err)
return;
if (ws.bLoggedIn)
return;
if (ws.received_challenge)
sendLoginCommand(ws, ws.received_challenge);
else
ws.bLoggingIn = true;
console.log('done loginToHub');
});
}
setInterval(loginToHub, RECONNECT_TO_HUB_PERIOD);
eventBus.on('connected', loginToHub);
function sendLoginCommand(ws, challenge){
var objLogin = {challenge: challenge, pubkey: objMyPermanentDeviceKey.pub_b64};
objLogin.signature = ecdsaSig.sign(objectHash.getDeviceMessageHashToSign(objLogin), objMyPermanentDeviceKey.priv);
network.sendJustsaying(ws, 'hub/login', objLogin);
ws.bLoggedIn = true;
sendTempPubkey(ws, objMyTempDeviceKey.pub_b64);
network.initWitnessesIfNecessary(ws);
resendStalledMessages(1);
}
function sendTempPubkey(ws, temp_pubkey, callbacks){
if (!callbacks)
callbacks = {ifOk: function(){}, ifError: function(){}};
network.sendRequest(ws, 'hub/temp_pubkey', createTempPubkeyPackage(temp_pubkey), false, function(ws, request, response){
if (response === 'updated')
return callbacks.ifOk();
var error = response.error || ("unrecognized response: "+JSON.stringify(response));
callbacks.ifError(error);
});
}
function createTempPubkeyPackage(temp_pubkey){
var objTempPubkey = {
temp_pubkey: temp_pubkey,
pubkey: objMyPermanentDeviceKey.pub_b64
};
objTempPubkey.signature = ecdsaSig.sign(objectHash.getDeviceMessageHashToSign(objTempPubkey), objMyPermanentDeviceKey.priv);
return objTempPubkey;
}
// ------------------------------
// rotation of temp keys
function genPrivKey(){
var privKey;
do {
console.log("generating new priv key");
privKey = crypto.randomBytes(32);
}
while (!ecdsa.privateKeyVerify(privKey));
return privKey;
}
var last_rotate_wake_ts = Date.now();
function rotateTempDeviceKeyIfCouldBeAlreadyUsed(){
var actual_interval = Date.now() - last_rotate_wake_ts;
last_rotate_wake_ts = Date.now();
if (actual_interval > TEMP_DEVICE_KEY_ROTATION_PERIOD + 1000)
return console.log("woke up after sleep or high load, will skip rotation");
if (objMyTempDeviceKey.use_count === 0) // new key that was never used yet
return console.log("the current temp key was not used yet, will not rotate");
// if use_count === null, the key was set at start up, it could've been used before
rotateTempDeviceKey();
}
function rotateTempDeviceKey(){
if (!saveTempKeys)
return console.log("no saving function");
console.log("will rotate temp device key");
network.findOutboundPeerOrConnect(conf.WS_PROTOCOL+my_device_hub, function onLocatedHubForRotation(err, ws){
if (err)
return console.log('will not rotate because: '+err);
if (ws.readyState !== ws.OPEN)
return console.log('will not rotate because connection is not open');
if (!ws.bLoggedIn)
return console.log('will not rotate because not logged in'); // reconnected and not logged in yet
var new_priv_key = genPrivKey();
var objNewMyTempDeviceKey = {
use_count: 0,
priv: new_priv_key,
pub_b64: ecdsa.publicKeyCreate(new_priv_key, true).toString('base64')
};
saveTempKeys(new_priv_key, objMyTempDeviceKey.priv, function(err){
if (err){
console.log('failed to save new temp keys, canceling: '+err);
return;
}
objMyPrevTempDeviceKey = objMyTempDeviceKey;
objMyTempDeviceKey = objNewMyTempDeviceKey;
breadcrumbs.add('rotated temp device key');
sendTempPubkey(ws, objMyTempDeviceKey.pub_b64);
});
});
}
function scheduleTempDeviceKeyRotation(){
if (bScheduledTempDeviceKeyRotation)
return;
bScheduledTempDeviceKeyRotation = true;
console.log('will schedule rotation in 1 minute');
setTimeout(function(){
// due to timeout, we are probably last to request (and receive) this lock
mutex.lock(["from_hub"], function(unlock){
console.log("will schedule rotation");
rotateTempDeviceKeyIfCouldBeAlreadyUsed();
last_rotate_wake_ts = Date.now();
setInterval(rotateTempDeviceKeyIfCouldBeAlreadyUsed, TEMP_DEVICE_KEY_ROTATION_PERIOD);
unlock();
});
}, 60*1000);
}
// ---------------------------
// sending/receiving messages
function deriveSharedSecret(ecdh, peer_b64_pubkey){
var shared_secret_src = ecdh.computeSecret(peer_b64_pubkey, "base64");
var shared_secret = crypto.createHash("sha256").update(shared_secret_src).digest().slice(0, 16);
return shared_secret;
}
function decryptPackage(objEncryptedPackage){
var priv_key;
if (objEncryptedPackage.dh.recipient_ephemeral_pubkey === objMyTempDeviceKey.pub_b64){
priv_key = objMyTempDeviceKey.priv;
if (objMyTempDeviceKey.use_count)
objMyTempDeviceKey.use_count++;
else
objMyTempDeviceKey.use_count = 1;
console.log("message encrypted to temp key");
}
else if (objMyPrevTempDeviceKey && objEncryptedPackage.dh.recipient_ephemeral_pubkey === objMyPrevTempDeviceKey.pub_b64){
priv_key = objMyPrevTempDeviceKey.priv;
console.log("message encrypted to prev temp key");
//console.log("objMyPrevTempDeviceKey: "+JSON.stringify(objMyPrevTempDeviceKey));
//console.log("prev temp private key buf: ", priv_key);
//console.log("prev temp private key b64: "+priv_key.toString('base64'));
}
else if (objEncryptedPackage.dh.recipient_ephemeral_pubkey === objMyPermanentDeviceKey.pub_b64){
priv_key = objMyPermanentDeviceKey.priv;
console.log("message encrypted to permanent key");
}
else{
console.log("message encrypted to unknown key");
setTimeout(function(){
throw Error("message encrypted to unknown key, device "+my_device_address+", len="+objEncryptedPackage.encrypted_message.length+". The error might be caused by restoring from an old backup or using the same keys on another device.");
}, 100);
// eventBus.emit('nonfatal_error', "message encrypted to unknown key, device "+my_device_address+", len="+objEncryptedPackage.encrypted_message.length, new Error('unknown key'));
return null;
}
var ecdh = crypto.createECDH('secp256k1');
if (process.browser) // workaround bug in crypto-browserify https://github.com/crypto-browserify/createECDH/issues/9
ecdh.generateKeys("base64", "compressed");
ecdh.setPrivateKey(priv_key);
var shared_secret = deriveSharedSecret(ecdh, objEncryptedPackage.dh.sender_ephemeral_pubkey);
var iv = new Buffer(objEncryptedPackage.iv, 'base64');
var decipher = crypto.createDecipheriv('aes-128-gcm', shared_secret, iv);
var authtag = new Buffer(objEncryptedPackage.authtag, 'base64');
decipher.setAuthTag(authtag);
var enc_buf = Buffer(objEncryptedPackage.encrypted_message, "base64");
// var decrypted1 = decipher.update(enc_buf);
// under browserify, decryption of long buffers fails with Array buffer allocation errors, have to split the buffer into chunks
var arrChunks = [];
var CHUNK_LENGTH = 4096;
for (var offset = 0; offset < enc_buf.length; offset += CHUNK_LENGTH){
// console.log('offset '+offset);
arrChunks.push(decipher.update(enc_buf.slice(offset, Math.min(offset+CHUNK_LENGTH, enc_buf.length))));
}
var decrypted1 = Buffer.concat(arrChunks);
arrChunks = null;
var decrypted2 = decipher.final();
breadcrumbs.add("decrypted lengths: "+decrypted1.length+" + "+decrypted2.length);
var decrypted_message_buf = Buffer.concat([decrypted1, decrypted2]);
var decrypted_message = decrypted_message_buf.toString("utf8");
console.log("decrypted: "+decrypted_message);
var json = JSON.parse(decrypted_message);
if (json.encrypted_package){ // strip another layer of encryption
console.log("inner encryption");
return decryptPackage(json.encrypted_package);
}
else
return json;
}
// a hack to read large text from cordova sqlite
function readMessageInChunksFromOutbox(message_hash, len, handleMessage){
var CHUNK_LEN = 1000000;
var start = 1;
var message = '';
function readChunk(){
db.query("SELECT SUBSTR(message, ?, ?) AS chunk FROM outbox WHERE message_hash=?", [start, CHUNK_LEN, message_hash], function(rows){
if (rows.length === 0)
return handleMessage();
if (rows.length > 1)
throw Error(rows.length+' msgs by hash in outbox, start='+start+', length='+len);
message += rows[0].chunk;
start += CHUNK_LEN;
(start > len) ? handleMessage(message) : readChunk();
});
}
readChunk();
}
function resendStalledMessages(delay){
var delay = delay || 0;
console.log("resending stalled messages delayed by "+delay+" minute");
if (!objMyPermanentDeviceKey)
return console.log("objMyPermanentDeviceKey not set yet, can't resend stalled messages");
mutex.lockOrSkip(['stalled'], function(unlock){
var bCordova = (typeof window !== 'undefined' && window && window.cordova);
db.query(
"SELECT "+(bCordova ? "LENGTH(message) AS len" : "message")+", message_hash, `to`, pubkey, hub \n\
FROM outbox JOIN correspondent_devices ON `to`=device_address \n\
WHERE outbox.creation_date<="+db.addTime("-"+delay+" MINUTE")+" ORDER BY outbox.creation_date",
function(rows){
console.log(rows.length+" stalled messages");
async.eachSeries(
rows,
function(row, cb){
if (!row.hub){ // weird error
eventBus.emit('nonfatal_error', "no hub in resendStalledMessages: "+JSON.stringify(row)+", l="+rows.length, new Error('no hub'));
return cb();
}
// throw Error("no hub in resendStalledMessages: "+JSON.stringify(row));
var send = function(message){
if (!message) // the message is already gone
return cb();
var objDeviceMessage = JSON.parse(message);
//if (objDeviceMessage.to !== row.to)
// throw "to mismatch";
console.log('sending stalled '+row.message_hash);
sendPreparedMessageToHub(row.hub, row.pubkey, row.message_hash, objDeviceMessage, {ifOk: cb, ifError: function(err){ cb(); }});
};
bCordova ? readMessageInChunksFromOutbox(row.message_hash, row.len, send) : send(row.message);
},
unlock
);
}
);
});
}
setInterval(function(){ resendStalledMessages(1); }, SEND_RETRY_PERIOD);
// reliable delivery
// first param is either WebSocket or hostname of the hub
function reliablySendPreparedMessageToHub(ws, recipient_device_pubkey, json, callbacks, conn){
var recipient_device_address = objectHash.getDeviceAddress(recipient_device_pubkey);
console.log('will encrypt and send to '+recipient_device_address+': '+JSON.stringify(json));
// encrypt to recipient's permanent pubkey before storing the message into outbox
var objEncryptedPackage = createEncryptedPackage(json, recipient_device_pubkey);
// if the first attempt fails, this will be the inner message
var objDeviceMessage = {
encrypted_package: objEncryptedPackage
};
var message_hash = objectHash.getBase64Hash(objDeviceMessage);
conn = conn || db;
conn.query(
"INSERT INTO outbox (message_hash, `to`, message) VALUES (?,?,?)",
[message_hash, recipient_device_address, JSON.stringify(objDeviceMessage)],
function(){
if (callbacks && callbacks.onSaved){
callbacks.onSaved();
// db in resendStalledMessages will block until the transaction commits, assuming only 1 db connection
// (fix if more than 1 db connection is allowed: in this case, it will send only after SEND_RETRY_PERIOD delay)
process.nextTick(resendStalledMessages);
// don't send to the network before the transaction commits
return callbacks.ifOk ? callbacks.ifOk() : null;
}
sendPreparedMessageToHub(ws, recipient_device_pubkey, message_hash, json, callbacks);
}
);
}
// first param is either WebSocket or hostname of the hub
function sendPreparedMessageToHub(ws, recipient_device_pubkey, message_hash, json, callbacks){
if (!callbacks)
callbacks = {ifOk: function(){}, ifError: function(){}};
if (typeof ws === "string"){
var hub_host = ws;
network.findOutboundPeerOrConnect(conf.WS_PROTOCOL+hub_host, function onLocatedHubForSend(err, ws){
if (err)
return callbacks.ifError(err);
sendPreparedMessageToConnectedHub(ws, recipient_device_pubkey, message_hash, json, callbacks);
});
}
else
sendPreparedMessageToConnectedHub(ws, recipient_device_pubkey, message_hash, json, callbacks);
}
// first param is WebSocket only
function sendPreparedMessageToConnectedHub(ws, recipient_device_pubkey, message_hash, json, callbacks){
network.sendRequest(ws, 'hub/get_temp_pubkey', recipient_device_pubkey, false, function(ws, request, response){
function handleError(error){
callbacks.ifError(error);
db.query("UPDATE outbox SET last_error=? WHERE message_hash=?", [error, message_hash], function(){});
}
if (response.error)
return handleError(response.error);
var objTempPubkey = response;
if (!objTempPubkey.temp_pubkey || !objTempPubkey.pubkey || !objTempPubkey.signature)
return handleError("missing fields in hub response");
if (objTempPubkey.pubkey !== recipient_device_pubkey)
return handleError("temp pubkey signed by wrong permanent pubkey");
if (!ecdsaSig.verify(objectHash.getDeviceMessageHashToSign(objTempPubkey), objTempPubkey.signature, objTempPubkey.pubkey))
return handleError("wrong sig under temp pubkey");
var objEncryptedPackage = createEncryptedPackage(json, objTempPubkey.temp_pubkey);
var recipient_device_address = objectHash.getDeviceAddress(recipient_device_pubkey);
var objDeviceMessage = {
encrypted_package: objEncryptedPackage,
to: recipient_device_address,
pubkey: objMyPermanentDeviceKey.pub_b64 // who signs. Essentially, the from again.
};
objDeviceMessage.signature = ecdsaSig.sign(objectHash.getDeviceMessageHashToSign(objDeviceMessage), objMyPermanentDeviceKey.priv);
network.sendRequest(ws, 'hub/deliver', objDeviceMessage, false, function(ws, request, response){
if (response === "accepted"){
db.query("DELETE FROM outbox WHERE message_hash=?", [message_hash], function(){
callbacks.ifOk();
});
}
else
handleError( response.error || ("unrecognized response: "+JSON.stringify(response)) );
});
});
}
function createEncryptedPackage(json, recipient_device_pubkey){
var text = JSON.stringify(json);
// console.log("will encrypt and send: "+text);
var ecdh = crypto.createECDH('secp256k1');
var sender_ephemeral_pubkey = ecdh.generateKeys("base64", "compressed");
var shared_secret = deriveSharedSecret(ecdh, recipient_device_pubkey); // Buffer
console.log(shared_secret.length);
// we could also derive iv from the unused bits of ecdh.computeSecret() and save some bandwidth
var iv = crypto.randomBytes(12); // 128 bits (16 bytes) total, we take 12 bytes for random iv and leave 4 bytes for the counter
var cipher = crypto.createCipheriv("aes-128-gcm", shared_secret, iv);
// under browserify, encryption of long strings fails with Array buffer allocation errors, have to split the string into chunks
var arrChunks = [];
var CHUNK_LENGTH = 2003;
for (var offset = 0; offset < text.length; offset += CHUNK_LENGTH){
// console.log('offset '+offset);
arrChunks.push(cipher.update(text.slice(offset, Math.min(offset+CHUNK_LENGTH, text.length)), 'utf8'));
}
arrChunks.push(cipher.final());
var encrypted_message_buf = Buffer.concat(arrChunks);
arrChunks = null;
// var encrypted_message_buf = Buffer.concat([cipher.update(text, "utf8"), cipher.final()]);
//console.log(encrypted_message_buf);
var encrypted_message = encrypted_message_buf.toString("base64");
//console.log(encrypted_message);
var authtag = cipher.getAuthTag();
// this is visible and verifiable by the hub
var encrypted_package = {
encrypted_message: encrypted_message,
iv: iv.toString('base64'),
authtag: authtag.toString('base64'),
dh: {
sender_ephemeral_pubkey: sender_ephemeral_pubkey,
recipient_ephemeral_pubkey: recipient_device_pubkey
}
};
return encrypted_package;
}
// first param is either WebSocket or hostname of the hub or null
function sendMessageToHub(ws, recipient_device_pubkey, subject, body, callbacks, conn){
// this content is hidden from the hub by encryption
var json = {
from: my_device_address, // presence of this field guarantees that you cannot strip off the signature and add your own signature instead
device_hub: my_device_hub,
subject: subject,
body: body
};
conn = conn || db;
if (ws)
return reliablySendPreparedMessageToHub(ws, recipient_device_pubkey, json, callbacks, conn);
var recipient_device_address = objectHash.getDeviceAddress(recipient_device_pubkey);
conn.query("SELECT hub FROM correspondent_devices WHERE device_address=?", [recipient_device_address], function(rows){
if (rows.length !== 1)
throw Error("no hub in correspondents");
reliablySendPreparedMessageToHub(rows[0].hub, recipient_device_pubkey, json, callbacks, conn);
});
}
function sendMessageToDevice(device_address, subject, body, callbacks, conn){
conn = conn || db;
conn.query("SELECT hub, pubkey FROM correspondent_devices WHERE device_address=?", [device_address], function(rows){
if (rows.length !== 1)
throw Error("correspondent not found");
sendMessageToHub(rows[0].hub, rows[0].pubkey, subject, body, callbacks, conn);
});
}
// -------------------------
// pairing
function sendPairingMessage(hub_host, recipient_device_pubkey, pairing_secret, reverse_pairing_secret, callbacks){
var body = {pairing_secret: pairing_secret, device_name: my_device_name};
if (reverse_pairing_secret)
body.reverse_pairing_secret = reverse_pairing_secret;
sendMessageToHub(hub_host, recipient_device_pubkey, "pairing", body, callbacks);
}
function startWaitingForPairing(handlePairingInfo){
var pairing_secret = crypto.randomBytes(9).toString("base64");
var pairingInfo = {
pairing_secret: pairing_secret,
device_pubkey: objMyPermanentDeviceKey.pub_b64,
device_address: my_device_address,
hub: my_device_hub
};
db.query("INSERT INTO pairing_secrets (pairing_secret, expiry_date) VALUES(?, "+db.addTime("+1 MONTH")+")", [pairing_secret], function(){
handlePairingInfo(pairingInfo);
});
}
// {pairing_secret: "random string", device_name: "Bob's MacBook Pro", reverse_pairing_secret: "random string"}
function handlePairingMessage(json, device_pubkey, callbacks){
var body = json.body;
var from_address = objectHash.getDeviceAddress(device_pubkey);
if (!ValidationUtils.isNonemptyString(body.pairing_secret))
return callbacks.ifError("correspondent not known and no pairing secret");
if (!ValidationUtils.isNonemptyString(json.device_hub)) // home hub of the sender
return callbacks.ifError("no device_hub when pairing");
if (!ValidationUtils.isNonemptyString(body.device_name))
return callbacks.ifError("no device_name when pairing");
if ("reverse_pairing_secret" in body && !ValidationUtils.isNonemptyString(body.reverse_pairing_secret))
return callbacks.ifError("bad reverse pairing secret");
db.query(
"SELECT is_permanent FROM pairing_secrets WHERE pairing_secret=? AND expiry_date > "+db.getNow(),
[body.pairing_secret],
function(pairing_rows){
if (pairing_rows.length === 0)
return callbacks.ifError("pairing secret not found or expired");
// add new correspondent and delete pending pairing
db.query(
"INSERT "+db.getIgnore()+" INTO correspondent_devices (device_address, pubkey, hub, name, is_confirmed) VALUES (?,?,?,?,1)",
[from_address, device_pubkey, json.device_hub, body.device_name],
function(){
db.query( // don't update name if already confirmed
"UPDATE correspondent_devices SET is_confirmed=1, name=? WHERE device_address=? AND is_confirmed=0",
[body.device_name, from_address],
function(){
eventBus.emit("paired", from_address);
if (pairing_rows[0].is_permanent === 0){ // multiple peers can pair through permanent secret
db.query("DELETE FROM pairing_secrets WHERE pairing_secret=?", [body.pairing_secret], function(){});
eventBus.emit('paired_by_secret-'+body.pairing_secret, from_address);
}
if (body.reverse_pairing_secret)
sendPairingMessage(json.device_hub, device_pubkey, body.reverse_pairing_secret, null);
callbacks.ifOk();
}
);
}
);
}
);
}
// -------------------------------
// correspondents
function addUnconfirmedCorrespondent(device_pubkey, device_hub, device_name, onDone){
console.log("addUnconfirmedCorrespondent");
var device_address = objectHash.getDeviceAddress(device_pubkey);
db.query(
"INSERT "+db.getIgnore()+" INTO correspondent_devices (device_address, pubkey, hub, name, is_confirmed) VALUES (?,?,?,?,0)",
[device_address, device_pubkey, device_hub, device_name],
function(){
if (onDone)
onDone(device_address);
}
);
}
function readCorrespondents(handleCorrespondents){
db.query("SELECT device_address, hub, name, my_record_pref, peer_record_pref FROM correspondent_devices ORDER BY name", function(rows){
handleCorrespondents(rows);
});
}
function readCorrespondent(device_address, handleCorrespondent){
db.query("SELECT device_address, hub, name, my_record_pref, peer_record_pref FROM correspondent_devices WHERE device_address=?", [device_address], function(rows){
handleCorrespondent(rows.length ? rows[0] : null);
});
}
function readCorrespondentsByDeviceAddresses(arrDeviceAddresses, handleCorrespondents){
db.query(
"SELECT device_address, hub, name, pubkey, my_record_pref, peer_record_pref FROM correspondent_devices WHERE device_address IN(?) ORDER BY name",
[arrDeviceAddresses],
function(rows){
handleCorrespondents(rows);
}
);
}
function updateCorrespondentProps(correspondent, onDone){
db.query(
"UPDATE correspondent_devices SET hub=?, name=?, my_record_pref=?, peer_record_pref=? WHERE device_address=?",
[correspondent.hub, correspondent.name, correspondent.my_record_pref, correspondent.peer_record_pref, correspondent.device_address],
function(){
if (onDone) onDone();
}
);
}
function addIndirectCorrespondents(arrOtherCosigners, onDone){
async.eachSeries(arrOtherCosigners, function(correspondent, cb){
if (correspondent.device_address === my_device_address)
return cb();
db.query(
"INSERT "+db.getIgnore()+" INTO correspondent_devices (device_address, hub, name, pubkey, is_indirect) VALUES(?,?,?,?,1)",
[correspondent.device_address, correspondent.hub, correspondent.name, correspondent.pubkey],
function(){
cb();
}
);
}, onDone);
}
function removeCorrespondentDevice(device_address, onDone){
breadcrumbs.add('correspondent removed: '+device_address);
var arrQueries = [];
db.addQuery(arrQueries, "DELETE FROM outbox WHERE `to`=?", [device_address]);
db.addQuery(arrQueries, "DELETE FROM correspondent_devices WHERE device_address=?", [device_address]);
async.series(arrQueries, onDone);
}
// -------------------------------
// witnesses
function getWitnessesFromHub(cb){
console.log('getWitnessesFromHub');
if (!my_device_hub){
console.log('getWitnessesFromHub: no hub yet');
return setTimeout(function(){
getWitnessesFromHub(cb);
}, 2000);
}
network.findOutboundPeerOrConnect(conf.WS_PROTOCOL+my_device_hub, function(err, ws){
if (err)
return cb(err);
network.sendRequest(ws, 'get_witnesses', null, false, function(ws, request, response){
if (response.error)
return cb(response.error);
var arrWitnessesFromHub = response;
cb(null, arrWitnessesFromHub);
});
});
}
// responseHandler(error, response) callback
function requestFromHub(command, params, responseHandler){
if (!my_device_hub)
return setTimeout(function(){ requestFromHub(command, params, responseHandler); }, 2000);
network.findOutboundPeerOrConnect(conf.WS_PROTOCOL+my_device_hub, function(err, ws){
if (err)
return responseHandler(err);
network.sendRequest(ws, command, params, false, function(ws, request, response){
if (response.error)
return responseHandler(response.error);
responseHandler(null, response);
});
});
}
exports.getMyDevicePubKey = getMyDevicePubKey;
exports.getMyDeviceAddress = getMyDeviceAddress;
exports.isValidPubKey = isValidPubKey;
exports.genPrivKey = genPrivKey;
exports.setDevicePrivateKey = setDevicePrivateKey;
exports.setTempKeys = setTempKeys;
exports.setDeviceAddress = setDeviceAddress;
exports.setNewDeviceAddress = setNewDeviceAddress;
exports.setDeviceName = setDeviceName;
exports.setDeviceHub = setDeviceHub;
exports.scheduleTempDeviceKeyRotation = scheduleTempDeviceKeyRotation;
exports.decryptPackage = decryptPackage;
exports.handleChallenge = handleChallenge;
exports.loginToHub = loginToHub;
exports.sendMessageToHub = sendMessageToHub;
exports.sendMessageToDevice = sendMessageToDevice;
exports.sendPairingMessage = sendPairingMessage;
exports.startWaitingForPairing = startWaitingForPairing;
exports.handlePairingMessage = handlePairingMessage;
exports.addUnconfirmedCorrespondent = addUnconfirmedCorrespondent;
exports.readCorrespondents = readCorrespondents;
exports.readCorrespondent = readCorrespondent;
exports.readCorrespondentsByDeviceAddresses = readCorrespondentsByDeviceAddresses;
exports.updateCorrespondentProps = updateCorrespondentProps;
exports.removeCorrespondentDevice = removeCorrespondentDevice;
exports.addIndirectCorrespondents = addIndirectCorrespondents;
exports.getWitnessesFromHub = getWitnessesFromHub;
exports.requestFromHub = requestFromHub;