node-noise
Version:
143 lines • 7.76 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Handshake = void 0;
var handshake_1 = require("./@types/handshake");
var errors_1 = require("./errors");
var EMPTY_BUFFER = new Uint8Array(0);
var Handshake = /** @class */ (function () {
function Handshake(isInitiator, prologue, crypto, staticKeypair, connection, handshake, handshakeHandler, remotePublicKey, metrics) {
this.isInitiator = isInitiator;
this.prologue = prologue;
this.staticKeypair = staticKeypair;
this.connection = connection;
this.remotePublicKey = remotePublicKey || null;
this.handshakeHandler = handshakeHandler || null;
this.handshake = handshake;
this.session = handshake.initSession(this.isInitiator, this.prologue, this.staticKeypair, remotePublicKey || null);
this.metrics = metrics || null;
}
Handshake.prototype.doHandshake = function () {
return __awaiter(this, void 0, void 0, function () {
var handshakeHandler, data, payload, res, payload, temp, messages, _a, cs1, cs2;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
handshakeHandler = this.handshakeHandler;
_b.label = 1;
case 1:
if (!true) return [3 /*break*/, 10];
if (!(this.session.action === handshake_1.Action.READ_MESSAGE)) return [3 /*break*/, 5];
return [4 /*yield*/, this.connection.readLP()];
case 2:
data = _b.sent();
payload = this.handshake.readMessage(this.session, data);
if (this.session.hs.rs) {
if (this.remotePublicKey && Buffer.compare(this.remotePublicKey, this.session.hs.rs) != 0) {
throw new Error('not same remote public key');
}
this.remotePublicKey = this.session.hs.rs;
}
if (!(handshakeHandler && handshakeHandler.onReadMessage)) return [3 /*break*/, 4];
return [4 /*yield*/, handshakeHandler.onReadMessage(this.session, payload)];
case 3:
res = _b.sent();
if (!res) {
throw new Error('handshake rejected');
}
_b.label = 4;
case 4: return [3 /*break*/, 9];
case 5:
if (!(this.session.action === handshake_1.Action.WRITE_MESSAGE)) return [3 /*break*/, 8];
payload = EMPTY_BUFFER;
if (!(handshakeHandler && handshakeHandler.beforeWriteMessage)) return [3 /*break*/, 7];
return [4 /*yield*/, handshakeHandler.beforeWriteMessage(this.session)];
case 6:
temp = _b.sent();
if (temp) {
payload = temp;
}
_b.label = 7;
case 7:
messages = this.handshake.writeMessage(this.session, payload);
this.connection.writeLP(messages.slice());
return [3 /*break*/, 9];
case 8:
if (this.session.action === handshake_1.Action.SPLIT) {
_a = this.handshake.split(this.session.hs.ss), cs1 = _a.cs1, cs2 = _a.cs2;
this.session.cs1 = cs1;
this.session.cs2 = cs2;
return [2 /*return*/];
}
else {
throw new Error('illegal state');
}
_b.label = 9;
case 9: return [3 /*break*/, 1];
case 10: return [2 /*return*/];
}
});
});
};
Handshake.prototype.decrypt = function (ciphertext, session, dst) {
var cs = this.getCS(session, false);
return this.handshake.decryptWithAd(cs, new Uint8Array(0), ciphertext, dst);
};
Handshake.prototype.encrypt = function (plaintext, session) {
var cs = this.getCS(session);
return this.handshake.encryptWithAd(cs, new Uint8Array(0), plaintext);
};
Handshake.prototype.getRemoteStaticKey = function () {
return this.session.hs.rs;
};
Handshake.prototype.getCS = function (session, encryption) {
if (encryption === void 0) { encryption = true; }
if (!session.cs1 || !session.cs2) {
throw new errors_1.InvalidCryptoExchangeError('Handshake not completed properly, cipher state does not exist.');
}
if (this.isInitiator) {
return encryption ? session.cs1 : session.cs2;
}
else {
return encryption ? session.cs2 : session.cs1;
}
};
return Handshake;
}());
exports.Handshake = Handshake;
//# sourceMappingURL=handshake.js.map