tedious/lib/message-io.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _nativeDuplexpair = _interopRequireDefault(require("native-duplexpair"));
var tls = _interopRequireWildcard(require("tls"));
var _events = require("events");
var _message = _interopRequireDefault(require("./message"));
var _packet = require("./packet");
var _incomingMessageStream = _interopRequireDefault(require("./incoming-message-stream"));
var _outgoingMessageStream = _interopRequireDefault(require("./outgoing-message-stream"));
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
class MessageIO extends _events.EventEmitter {
  constructor(socket, packetSize, debug) {
    super();
    this.socket = socket;
    this.debug = debug;
    this.tlsNegotiationComplete = false;
    this.incomingMessageStream = new _incomingMessageStream.default(this.debug);
    this.incomingMessageIterator = this.incomingMessageStream[Symbol.asyncIterator]();
    this.outgoingMessageStream = new _outgoingMessageStream.default(this.debug, {
      packetSize: packetSize
    });
    this.socket.pipe(this.incomingMessageStream);
    this.outgoingMessageStream.pipe(this.socket);
  }
  packetSize(...args) {
    if (args.length > 0) {
      const packetSize = args[0];
      this.debug.log('Packet size changed from ' + this.outgoingMessageStream.packetSize + ' to ' + packetSize);
      this.outgoingMessageStream.packetSize = packetSize;
    }
    if (this.securePair) {
      this.securePair.cleartext.setMaxSendFragment(this.outgoingMessageStream.packetSize);
    }
    return this.outgoingMessageStream.packetSize;
  }

  // Negotiate TLS encryption.
  startTls(credentialsDetails, hostname, trustServerCertificate) {
    if (!credentialsDetails.maxVersion || !['TLSv1.2', 'TLSv1.1', 'TLSv1'].includes(credentialsDetails.maxVersion)) {
      credentialsDetails.maxVersion = 'TLSv1.2';
    }
    const secureContext = tls.createSecureContext(credentialsDetails);
    return new Promise((resolve, reject) => {
      const duplexpair = new _nativeDuplexpair.default();
      const securePair = this.securePair = {
        cleartext: tls.connect({
          socket: duplexpair.socket1,
          servername: hostname,
          secureContext: secureContext,
          rejectUnauthorized: !trustServerCertificate
        }),
        encrypted: duplexpair.socket2
      };
      const onSecureConnect = () => {
        securePair.encrypted.removeListener('readable', onReadable);
        securePair.cleartext.removeListener('error', onError);
        securePair.cleartext.removeListener('secureConnect', onSecureConnect);

        // If we encounter any errors from this point on,
        // we just forward them to the actual network socket.
        securePair.cleartext.once('error', err => {
          this.socket.destroy(err);
        });
        const cipher = securePair.cleartext.getCipher();
        if (cipher) {
          this.debug.log('TLS negotiated (' + cipher.name + ', ' + cipher.version + ')');
        }
        this.emit('secure', securePair.cleartext);
        securePair.cleartext.setMaxSendFragment(this.outgoingMessageStream.packetSize);
        this.outgoingMessageStream.unpipe(this.socket);
        this.socket.unpipe(this.incomingMessageStream);
        this.socket.pipe(securePair.encrypted);
        securePair.encrypted.pipe(this.socket);
        securePair.cleartext.pipe(this.incomingMessageStream);
        this.outgoingMessageStream.pipe(securePair.cleartext);
        this.tlsNegotiationComplete = true;
        resolve();
      };
      const onError = err => {
        securePair.encrypted.removeListener('readable', onReadable);
        securePair.cleartext.removeListener('error', onError);
        securePair.cleartext.removeListener('secureConnect', onSecureConnect);
        securePair.cleartext.destroy();
        securePair.encrypted.destroy();
        reject(err);
      };
      const onReadable = () => {
        // When there is handshake data on the encrypted stream of the secure pair,
        // we wrap it into a `PRELOGIN` message and send it to the server.
        //
        // For each `PRELOGIN` message we sent we get back exactly one response message
        // that contains the server's handshake response data.
        const message = new _message.default({
          type: _packet.TYPE.PRELOGIN,
          resetConnection: false
        });
        let chunk;
        while (chunk = securePair.encrypted.read()) {
          message.write(chunk);
        }
        this.outgoingMessageStream.write(message);
        message.end();
        this.readMessage().then(async response => {
          // Setup readable handler for the next round of handshaking.
          // If we encounter a `secureConnect` on the cleartext side
          // of the secure pair, the `readable` handler is cleared
          // and no further handshake handling will happen.
          securePair.encrypted.once('readable', onReadable);
          for await (const data of response) {
            // We feed the server's handshake response back into the
            // encrypted end of the secure pair.
            securePair.encrypted.write(data);
          }
        }).catch(onError);
      };
      securePair.cleartext.once('error', onError);
      securePair.cleartext.once('secureConnect', onSecureConnect);
      securePair.encrypted.once('readable', onReadable);
    });
  }

  // TODO listen for 'drain' event when socket.write returns false.
  // TODO implement incomplete request cancelation (2.2.1.6)
  sendMessage(packetType, data, resetConnection) {
    const message = new _message.default({
      type: packetType,
      resetConnection: resetConnection
    });
    message.end(data);
    this.outgoingMessageStream.write(message);
    return message;
  }

  /**
   * Read the next incoming message from the socket.
   */
  async readMessage() {
    const result = await this.incomingMessageIterator.next();
    if (result.done) {
      throw new Error('unexpected end of message stream');
    }
    return result.value;
  }
}
var _default = exports.default = MessageIO;
module.exports = MessageIO;
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["_nativeDuplexpair","_interopRequireDefault","require","tls","_interopRequireWildcard","_events","_message","_packet","_incomingMessageStream","_outgoingMessageStream","_getRequireWildcardCache","e","WeakMap","r","t","__esModule","default","has","get","n","__proto__","a","Object","defineProperty","getOwnPropertyDescriptor","u","prototype","hasOwnProperty","call","i","set","obj","MessageIO","EventEmitter","constructor","socket","packetSize","debug","tlsNegotiationComplete","incomingMessageStream","IncomingMessageStream","incomingMessageIterator","Symbol","asyncIterator","outgoingMessageStream","OutgoingMessageStream","pipe","args","length","log","securePair","cleartext","setMaxSendFragment","startTls","credentialsDetails","hostname","trustServerCertificate","maxVersion","includes","secureContext","createSecureContext","Promise","resolve","reject","duplexpair","DuplexPair","connect","socket1","servername","rejectUnauthorized","encrypted","socket2","onSecureConnect","removeListener","onReadable","onError","once","err","destroy","cipher","getCipher","name","version","emit","unpipe","message","Message","type","TYPE","PRELOGIN","resetConnection","chunk","read","write","end","readMessage","then","response","data","catch","sendMessage","packetType","result","next","done","Error","value","_default","exports","module"],"sources":["../src/message-io.ts"],"sourcesContent":["import DuplexPair from 'native-duplexpair';\n\nimport { Duplex } from 'stream';\nimport * as tls from 'tls';\nimport { Socket } from 'net';\nimport { EventEmitter } from 'events';\n\nimport Debug from './debug';\n\nimport Message from './message';\nimport { TYPE } from './packet';\n\nimport IncomingMessageStream from './incoming-message-stream';\nimport OutgoingMessageStream from './outgoing-message-stream';\n\nclass MessageIO extends EventEmitter {\n  declare socket: Socket;\n  declare debug: Debug;\n\n  declare tlsNegotiationComplete: boolean;\n\n  declare private incomingMessageStream: IncomingMessageStream;\n  declare outgoingMessageStream: OutgoingMessageStream;\n\n  declare securePair?: {\n    cleartext: tls.TLSSocket;\n    encrypted: Duplex;\n  };\n\n  declare incomingMessageIterator: AsyncIterableIterator<Message>;\n\n  constructor(socket: Socket, packetSize: number, debug: Debug) {\n    super();\n\n    this.socket = socket;\n    this.debug = debug;\n\n    this.tlsNegotiationComplete = false;\n\n    this.incomingMessageStream = new IncomingMessageStream(this.debug);\n    this.incomingMessageIterator = this.incomingMessageStream[Symbol.asyncIterator]();\n\n    this.outgoingMessageStream = new OutgoingMessageStream(this.debug, { packetSize: packetSize });\n\n    this.socket.pipe(this.incomingMessageStream);\n    this.outgoingMessageStream.pipe(this.socket);\n  }\n\n  packetSize(...args: [number]) {\n    if (args.length > 0) {\n      const packetSize = args[0];\n      this.debug.log('Packet size changed from ' + this.outgoingMessageStream.packetSize + ' to ' + packetSize);\n      this.outgoingMessageStream.packetSize = packetSize;\n    }\n\n    if (this.securePair) {\n      this.securePair.cleartext.setMaxSendFragment(this.outgoingMessageStream.packetSize);\n    }\n\n    return this.outgoingMessageStream.packetSize;\n  }\n\n  // Negotiate TLS encryption.\n  startTls(credentialsDetails: tls.SecureContextOptions, hostname: string, trustServerCertificate: boolean) {\n    if (!credentialsDetails.maxVersion || !['TLSv1.2', 'TLSv1.1', 'TLSv1'].includes(credentialsDetails.maxVersion)) {\n      credentialsDetails.maxVersion = 'TLSv1.2';\n    }\n\n    const secureContext = tls.createSecureContext(credentialsDetails);\n\n    return new Promise<void>((resolve, reject) => {\n      const duplexpair = new DuplexPair();\n      const securePair = this.securePair = {\n        cleartext: tls.connect({\n          socket: duplexpair.socket1 as Socket,\n          servername: hostname,\n          secureContext: secureContext,\n          rejectUnauthorized: !trustServerCertificate\n        }),\n        encrypted: duplexpair.socket2\n      };\n\n      const onSecureConnect = () => {\n        securePair.encrypted.removeListener('readable', onReadable);\n        securePair.cleartext.removeListener('error', onError);\n        securePair.cleartext.removeListener('secureConnect', onSecureConnect);\n\n        // If we encounter any errors from this point on,\n        // we just forward them to the actual network socket.\n        securePair.cleartext.once('error', (err) => {\n          this.socket.destroy(err);\n        });\n\n        const cipher = securePair.cleartext.getCipher();\n        if (cipher) {\n          this.debug.log('TLS negotiated (' + cipher.name + ', ' + cipher.version + ')');\n        }\n\n        this.emit('secure', securePair.cleartext);\n\n        securePair.cleartext.setMaxSendFragment(this.outgoingMessageStream.packetSize);\n\n        this.outgoingMessageStream.unpipe(this.socket);\n        this.socket.unpipe(this.incomingMessageStream);\n\n        this.socket.pipe(securePair.encrypted);\n        securePair.encrypted.pipe(this.socket);\n\n        securePair.cleartext.pipe(this.incomingMessageStream);\n        this.outgoingMessageStream.pipe(securePair.cleartext);\n\n        this.tlsNegotiationComplete = true;\n\n        resolve();\n      };\n\n      const onError = (err?: Error) => {\n        securePair.encrypted.removeListener('readable', onReadable);\n        securePair.cleartext.removeListener('error', onError);\n        securePair.cleartext.removeListener('secureConnect', onSecureConnect);\n\n        securePair.cleartext.destroy();\n        securePair.encrypted.destroy();\n\n        reject(err);\n      };\n\n      const onReadable = () => {\n        // When there is handshake data on the encrypted stream of the secure pair,\n        // we wrap it into a `PRELOGIN` message and send it to the server.\n        //\n        // For each `PRELOGIN` message we sent we get back exactly one response message\n        // that contains the server's handshake response data.\n        const message = new Message({ type: TYPE.PRELOGIN, resetConnection: false });\n\n        let chunk;\n        while (chunk = securePair.encrypted.read()) {\n          message.write(chunk);\n        }\n        this.outgoingMessageStream.write(message);\n        message.end();\n\n        this.readMessage().then(async (response) => {\n          // Setup readable handler for the next round of handshaking.\n          // If we encounter a `secureConnect` on the cleartext side\n          // of the secure pair, the `readable` handler is cleared\n          // and no further handshake handling will happen.\n          securePair.encrypted.once('readable', onReadable);\n\n          for await (const data of response) {\n            // We feed the server's handshake response back into the\n            // encrypted end of the secure pair.\n            securePair.encrypted.write(data);\n          }\n        }).catch(onError);\n      };\n\n      securePair.cleartext.once('error', onError);\n      securePair.cleartext.once('secureConnect', onSecureConnect);\n      securePair.encrypted.once('readable', onReadable);\n    });\n  }\n\n  // TODO listen for 'drain' event when socket.write returns false.\n  // TODO implement incomplete request cancelation (2.2.1.6)\n  sendMessage(packetType: number, data?: Buffer, resetConnection?: boolean) {\n    const message = new Message({ type: packetType, resetConnection: resetConnection });\n    message.end(data);\n    this.outgoingMessageStream.write(message);\n    return message;\n  }\n\n  /**\n   * Read the next incoming message from the socket.\n   */\n  async readMessage(): Promise<Message> {\n    const result = await this.incomingMessageIterator.next();\n\n    if (result.done) {\n      throw new Error('unexpected end of message stream');\n    }\n\n    return result.value;\n  }\n}\n\nexport default MessageIO;\nmodule.exports = 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