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implements authenticated encryption

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This commit is contained in:
Matias Alejo Garcia 2014-04-29 19:51:49 -03:00
commit 50d37aa22e
5 changed files with 48 additions and 6 deletions
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37
js/models/network/WebRTC.js
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@ -24,6 +24,12 @@ function Network(opts) {
this.debug = opts.debug || 3;
this.maxPeers = opts.maxPeers || 10;
this.opts = { key: opts.key };
this.sjclParams = opts.sjclParams || {
salt: 'f28bfb49ef70573c',
iter:500,
mode:'ccm',
ts:parseInt(64),
};
// For using your own peerJs server
['port', 'host', 'path', 'debug'].forEach(function(k) {
@ -152,10 +158,11 @@ Network.prototype._addCopayer = function(copayerId, isInbound) {
Network.prototype._onData = function(data, isInbound, peerId) {
Network.prototype._onData = function(encStr, isInbound, peerId) {
var sig, payload;
try {
var data = this._decrypt(encStr);
payload= JSON.parse(data);
} catch (e) {
console.log('### ERROR IN DATA: "%s" ', data, isInbound, e);
@ -355,13 +362,39 @@ Network.prototype.getPeer = function() {
return this.peer;
};
Network.prototype._encryptFor = function(copayerId, payloadStr) {
var cBits= sjcl.codec.hex.toBits(copayerId);
var pass64= sjcl.codec.base64.fromBits(cBits);
var plainText = sjcl.codec.utf8String.toBits(payloadStr);
var p = this.sjclParams; // auth strength
ct = sjcl.encrypt(pass64, plainText, p);//,p, rp);
var c = JSON.parse(ct);
var toSend = {
iv: c.iv,
ct: c.ct,
};
return JSON.stringify(toSend);
};
Network.prototype._decrypt = function(encStr) {
var i = JSON.parse(encStr);
for (var k in this.sjclParams) {
i[k] = this.sjclParams[k];
}
var str= JSON.stringify(i);
var cBits= sjcl.codec.hex.toBits(this.copayerId);
var pass64= sjcl.codec.base64.fromBits(cBits);
var pt = sjcl.decrypt(pass64, str);
return pt;
};
Network.prototype._sendToOne = function(copayerId, payloadStr, sig, cb) {
var peerId = this.peerFromCopayer(copayerId);
if (peerId !== this.peerId) {
var dataConn = this.connections[peerId];
if (dataConn) {
dataConn.send(payloadStr);
dataConn.send(this._encryptFor(copayerId, payloadStr));
}
else {
console.log('[WebRTC.js.255] WARN: NO CONNECTION TO:', peerId); //TODO