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obs-websocket.js
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obs-websocket.js
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/*!
* OBS WebSocket Javascript API (obs-websocket-js) v4.0.2
* Author: Brendan Hagan (haganbmj)
* License: MIT
* Repository: https://github.com/haganbmj/obs-websocket-js
* Build Timestamp: 2020-09-24 01:45:11+00:00
* Built from Commit: https://github.com/haganbmj/obs-websocket-js/commit/7a89c8ae9d02e9edaa0f878e0d93aa934e422cfe
*/
(function webpackUniversalModuleDefinition(root, factory) {
if(typeof exports === 'object' && typeof module === 'object')
module.exports = factory();
else if(typeof define === 'function' && define.amd)
define([], factory);
else if(typeof exports === 'object')
exports["OBSWebSocket"] = factory();
else
root["OBSWebSocket"] = factory();
})(window, function() {
return /******/ (function(modules) { // webpackBootstrap
/******/ // The module cache
/******/ var installedModules = {};
/******/
/******/ // The require function
/******/ function __webpack_require__(moduleId) {
/******/
/******/ // Check if module is in cache
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/******/ return installedModules[moduleId].exports;
/******/ }
/******/ // Create a new module (and put it into the cache)
/******/ var module = installedModules[moduleId] = {
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/******/ l: false,
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/******/
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/******/
/******/ // Flag the module as loaded
/******/ module.l = true;
/******/
/******/ // Return the exports of the module
/******/ return module.exports;
/******/ }
/******/
/******/
/******/ // expose the modules object (__webpack_modules__)
/******/ __webpack_require__.m = modules;
/******/
/******/ // expose the module cache
/******/ __webpack_require__.c = installedModules;
/******/
/******/ // define getter function for harmony exports
/******/ __webpack_require__.d = function(exports, name, getter) {
/******/ if(!__webpack_require__.o(exports, name)) {
/******/ Object.defineProperty(exports, name, { enumerable: true, get: getter });
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/******/ };
/******/
/******/ // define __esModule on exports
/******/ __webpack_require__.r = function(exports) {
/******/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
/******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ }
/******/ Object.defineProperty(exports, '__esModule', { value: true });
/******/ };
/******/
/******/ // create a fake namespace object
/******/ // mode & 1: value is a module id, require it
/******/ // mode & 2: merge all properties of value into the ns
/******/ // mode & 4: return value when already ns object
/******/ // mode & 8|1: behave like require
/******/ __webpack_require__.t = function(value, mode) {
/******/ if(mode & 1) value = __webpack_require__(value);
/******/ if(mode & 8) return value;
/******/ if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
/******/ var ns = Object.create(null);
/******/ __webpack_require__.r(ns);
/******/ Object.defineProperty(ns, 'default', { enumerable: true, value: value });
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/******/ function getModuleExports() { return module; };
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/************************************************************************/
/******/ ([
/* 0 */
/***/ (function(module, exports, __webpack_require__) {
const Socket = __webpack_require__(1);
const Status = __webpack_require__(14);
const debug = __webpack_require__(15)('obs-websocket-js:Core');
let requestCounter = 0;
function generateMessageId() {
return String(requestCounter++);
}
class OBSWebSocket extends Socket {
/**
* Generic Socket request method. Returns a promise.
* Generates a messageId internally and will override any passed in the args.
* Note that the requestType here is pre-marshaling and currently must match exactly what the websocket plugin is expecting.
*
* @param {String} requestType obs-websocket plugin expected request type.
* @param {Object} [args={}] request arguments.
* @return {Promise} Promise, passes the plugin response object.
*/
send(requestType, args = {}) {
args = args || {};
return new Promise((resolve, reject) => {
const messageId = generateMessageId();
let rejectReason;
if (!requestType) {
rejectReason = Status.REQUEST_TYPE_NOT_SPECIFIED;
}
if (!this._connected) {
rejectReason = Status.NOT_CONNECTED;
}
// Assign a temporary event listener for this particular messageId to uniquely identify the response.
this.once(`obs:internal:message:id-${messageId}`, (err, data) => {
if (err) {
debug('[send:reject] %o', err);
reject(err);
} else {
debug('[send:resolve] %o', data);
resolve(data);
}
});
// If we don't have a reason to fail fast, send the request to the socket.
if (!rejectReason) {
args['request-type'] = requestType;
args['message-id'] = messageId;
// Submit the request to the websocket.
debug('[send] %s %s %o', messageId, requestType, args);
try {
this._socket.send(JSON.stringify(args));
} catch (_) {
// TODO: Consider inspecting the exception thrown to gleam some relevant info and pass that on.
rejectReason = Status.SOCKET_EXCEPTION;
}
}
// If the socket call was unsuccessful or bypassed, simulate its resolution.
if (rejectReason) {
this.emit(`obs:internal:message:id-${messageId}`, rejectReason);
}
});
}
/**
* Generic Socket request method. Handles callbacks.
* Internally calls `send` (which is promise-based). See `send`'s docs for more details.
*
* @param {String} requestType obs-websocket plugin expected request type.
* @param {Object} [args={}] request arguments.
* @param {Function} callback Optional. callback(err, data)
*/
sendCallback(requestType, args = {}, callback) { // eslint-disable-line default-param-last
// Allow the `args` argument to be omitted.
if (callback === undefined && typeof args === 'function') {
callback = args;
args = {};
}
// Perform the actual request, using `send`.
this.send(requestType, args).then((...response) => {
callback(null, ...response);
}).catch(error => {
callback(error);
});
}
}
module.exports = OBSWebSocket;
/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {
const WebSocket = __webpack_require__(2);
const EventEmitter = __webpack_require__(4);
const hash = __webpack_require__(5);
const Status = __webpack_require__(14);
const debug = __webpack_require__(15)('obs-websocket-js:Socket');
const logAmbiguousError = __webpack_require__(19);
const camelCaseKeys = __webpack_require__(20);
class Socket extends EventEmitter {
constructor() {
super();
this._connected = false;
this._socket = undefined;
const originalEmit = this.emit;
this.emit = function (...args) {
debug('[emit] %s err: %o data: %o', ...args);
originalEmit.apply(this, args);
};
}
async connect(args = {}) {
args = args || {};
const address = args.address || 'localhost:4444';
if (this._socket) {
try {
// Blindly try to close the socket.
// Don't care if its already closed.
// We just don't want any sockets to leak.
this._socket.close();
} catch (error) {
// These errors are probably safe to ignore, but debug log them just in case.
debug('Failed to close previous WebSocket:', error.message);
}
}
// eslint-disable-next-line no-async-promise-executor
return new Promise(async (resolve, reject) => {
try {
await this._connect(address, Boolean(args.secure));
await this._authenticate(args.password);
resolve();
} catch (err) {
this._socket.close();
this._connected = false;
logAmbiguousError(debug, 'Connection failed:', err);
reject(err);
}
});
}
/**
* Opens a WebSocket connection to an obs-websocket server, but does not attempt any authentication.
*
* @param {String} address url without ws:// or wss:// prefix.
* @param {Boolean} secure whether to us ws:// or wss://
* @returns {Promise}
* @private
* @return {Promise} on attempted creation of WebSocket connection.
*/
async _connect(address, secure) {
return new Promise((resolve, reject) => {
let settled = false;
debug('Attempting to connect to: %s (secure: %s)', address, secure);
this._socket = new WebSocket((secure ? 'wss://' : 'ws://') + address);
// We only handle the initial connection error.
// Beyond that, the consumer is responsible for adding their own generic `error` event listener.
// FIXME: Unsure how best to expose additional information about the WebSocket error.
this._socket.onerror = err => {
if (settled) {
logAmbiguousError(debug, 'Unknown Socket Error', err);
this.emit('error', err);
return;
}
settled = true;
logAmbiguousError(debug, 'Websocket Connection failed:', err);
reject(Status.CONNECTION_ERROR);
};
this._socket.onopen = () => {
if (settled) {
return;
}
this._connected = true;
settled = true;
debug('Connection opened: %s', address);
this.emit('ConnectionOpened');
resolve();
};
// Looks like this should be bound. We don't technically cancel the connection when the authentication fails.
this._socket.onclose = () => {
this._connected = false;
debug('Connection closed: %s', address);
this.emit('ConnectionClosed');
};
// This handler must be present before we can call _authenticate.
this._socket.onmessage = msg => {
debug('[OnMessage]: %o', msg);
const message = camelCaseKeys(JSON.parse(msg.data));
let err;
let data;
if (message.status === 'error') {
err = message;
} else {
data = message;
}
// Emit the message with ID if available, otherwise try to find a non-messageId driven event.
if (message.messageId) {
this.emit(`obs:internal:message:id-${message.messageId}`, err, data);
} else if (message.updateType) {
this.emit(message.updateType, data);
} else {
logAmbiguousError(debug, 'Unrecognized Socket Message:', message);
this.emit('message', message);
}
};
});
}
/**
* Authenticates to an obs-websocket server. Must already have an active connection before calling this method.
*
* @param {String} [password=''] authentication string.
* @private
* @return {Promise} on resolution of authentication call.
*/
async _authenticate(password = '') {
if (!this._connected) {
throw Status.NOT_CONNECTED;
}
const auth = await this.send('GetAuthRequired');
if (!auth.authRequired) {
debug('Authentication not Required');
this.emit('AuthenticationSuccess');
return Status.AUTH_NOT_REQUIRED;
}
try {
await this.send('Authenticate', {
auth: hash(auth.salt, auth.challenge, password)
});
} catch (e) {
debug('Authentication Failure %o', e);
this.emit('AuthenticationFailure');
throw e;
}
debug('Authentication Success');
this.emit('AuthenticationSuccess');
}
/**
* Close and disconnect the WebSocket connection.
* FIXME: this should support a callback and return a Promise to match the connect method.
*
* @function
* @category request
*/
disconnect() {
debug('Disconnect requested.');
if (this._socket) {
this._socket.close();
}
}
}
module.exports = Socket;
/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {
/* WEBPACK VAR INJECTION */(function(global) {// https://github.com/maxogden/websocket-stream/blob/48dc3ddf943e5ada668c31ccd94e9186f02fafbd/ws-fallback.js
var ws = null
if (typeof WebSocket !== 'undefined') {
ws = WebSocket
} else if (typeof MozWebSocket !== 'undefined') {
ws = MozWebSocket
} else if (typeof global !== 'undefined') {
ws = global.WebSocket || global.MozWebSocket
} else if (typeof window !== 'undefined') {
ws = window.WebSocket || window.MozWebSocket
} else if (typeof self !== 'undefined') {
ws = self.WebSocket || self.MozWebSocket
}
module.exports = ws
/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(3)))
/***/ }),
/* 3 */
/***/ (function(module, exports) {
var g;
// This works in non-strict mode
g = (function() {
return this;
})();
try {
// This works if eval is allowed (see CSP)
g = g || new Function("return this")();
} catch (e) {
// This works if the window reference is available
if (typeof window === "object") g = window;
}
// g can still be undefined, but nothing to do about it...
// We return undefined, instead of nothing here, so it's
// easier to handle this case. if(!global) { ...}
module.exports = g;
/***/ }),
/* 4 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
var R = typeof Reflect === 'object' ? Reflect : null
var ReflectApply = R && typeof R.apply === 'function'
? R.apply
: function ReflectApply(target, receiver, args) {
return Function.prototype.apply.call(target, receiver, args);
}
var ReflectOwnKeys
if (R && typeof R.ownKeys === 'function') {
ReflectOwnKeys = R.ownKeys
} else if (Object.getOwnPropertySymbols) {
ReflectOwnKeys = function ReflectOwnKeys(target) {
return Object.getOwnPropertyNames(target)
.concat(Object.getOwnPropertySymbols(target));
};
} else {
ReflectOwnKeys = function ReflectOwnKeys(target) {
return Object.getOwnPropertyNames(target);
};
}
function ProcessEmitWarning(warning) {
if (console && console.warn) console.warn(warning);
}
var NumberIsNaN = Number.isNaN || function NumberIsNaN(value) {
return value !== value;
}
function EventEmitter() {
EventEmitter.init.call(this);
}
module.exports = EventEmitter;
// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;
EventEmitter.prototype._events = undefined;
EventEmitter.prototype._eventsCount = 0;
EventEmitter.prototype._maxListeners = undefined;
// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
var defaultMaxListeners = 10;
Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
enumerable: true,
get: function() {
return defaultMaxListeners;
},
set: function(arg) {
if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {
throw new RangeError('The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' + arg + '.');
}
defaultMaxListeners = arg;
}
});
EventEmitter.init = function() {
if (this._events === undefined ||
this._events === Object.getPrototypeOf(this)._events) {
this._events = Object.create(null);
this._eventsCount = 0;
}
this._maxListeners = this._maxListeners || undefined;
};
// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {
throw new RangeError('The value of "n" is out of range. It must be a non-negative number. Received ' + n + '.');
}
this._maxListeners = n;
return this;
};
function $getMaxListeners(that) {
if (that._maxListeners === undefined)
return EventEmitter.defaultMaxListeners;
return that._maxListeners;
}
EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
return $getMaxListeners(this);
};
EventEmitter.prototype.emit = function emit(type) {
var args = [];
for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);
var doError = (type === 'error');
var events = this._events;
if (events !== undefined)
doError = (doError && events.error === undefined);
else if (!doError)
return false;
// If there is no 'error' event listener then throw.
if (doError) {
var er;
if (args.length > 0)
er = args[0];
if (er instanceof Error) {
// Note: The comments on the `throw` lines are intentional, they show
// up in Node's output if this results in an unhandled exception.
throw er; // Unhandled 'error' event
}
// At least give some kind of context to the user
var err = new Error('Unhandled error.' + (er ? ' (' + er.message + ')' : ''));
err.context = er;
throw err; // Unhandled 'error' event
}
var handler = events[type];
if (handler === undefined)
return false;
if (typeof handler === 'function') {
ReflectApply(handler, this, args);
} else {
var len = handler.length;
var listeners = arrayClone(handler, len);
for (var i = 0; i < len; ++i)
ReflectApply(listeners[i], this, args);
}
return true;
};
function _addListener(target, type, listener, prepend) {
var m;
var events;
var existing;
if (typeof listener !== 'function') {
throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
}
events = target._events;
if (events === undefined) {
events = target._events = Object.create(null);
target._eventsCount = 0;
} else {
// To avoid recursion in the case that type === "newListener"! Before
// adding it to the listeners, first emit "newListener".
if (events.newListener !== undefined) {
target.emit('newListener', type,
listener.listener ? listener.listener : listener);
// Re-assign `events` because a newListener handler could have caused the
// this._events to be assigned to a new object
events = target._events;
}
existing = events[type];
}
if (existing === undefined) {
// Optimize the case of one listener. Don't need the extra array object.
existing = events[type] = listener;
++target._eventsCount;
} else {
if (typeof existing === 'function') {
// Adding the second element, need to change to array.
existing = events[type] =
prepend ? [listener, existing] : [existing, listener];
// If we've already got an array, just append.
} else if (prepend) {
existing.unshift(listener);
} else {
existing.push(listener);
}
// Check for listener leak
m = $getMaxListeners(target);
if (m > 0 && existing.length > m && !existing.warned) {
existing.warned = true;
// No error code for this since it is a Warning
// eslint-disable-next-line no-restricted-syntax
var w = new Error('Possible EventEmitter memory leak detected. ' +
existing.length + ' ' + String(type) + ' listeners ' +
'added. Use emitter.setMaxListeners() to ' +
'increase limit');
w.name = 'MaxListenersExceededWarning';
w.emitter = target;
w.type = type;
w.count = existing.length;
ProcessEmitWarning(w);
}
}
return target;
}
EventEmitter.prototype.addListener = function addListener(type, listener) {
return _addListener(this, type, listener, false);
};
EventEmitter.prototype.on = EventEmitter.prototype.addListener;
EventEmitter.prototype.prependListener =
function prependListener(type, listener) {
return _addListener(this, type, listener, true);
};
function onceWrapper() {
var args = [];
for (var i = 0; i < arguments.length; i++) args.push(arguments[i]);
if (!this.fired) {
this.target.removeListener(this.type, this.wrapFn);
this.fired = true;
ReflectApply(this.listener, this.target, args);
}
}
function _onceWrap(target, type, listener) {
var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
var wrapped = onceWrapper.bind(state);
wrapped.listener = listener;
state.wrapFn = wrapped;
return wrapped;
}
EventEmitter.prototype.once = function once(type, listener) {
if (typeof listener !== 'function') {
throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
}
this.on(type, _onceWrap(this, type, listener));
return this;
};
EventEmitter.prototype.prependOnceListener =
function prependOnceListener(type, listener) {
if (typeof listener !== 'function') {
throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
}
this.prependListener(type, _onceWrap(this, type, listener));
return this;
};
// Emits a 'removeListener' event if and only if the listener was removed.
EventEmitter.prototype.removeListener =
function removeListener(type, listener) {
var list, events, position, i, originalListener;
if (typeof listener !== 'function') {
throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
}
events = this._events;
if (events === undefined)
return this;
list = events[type];
if (list === undefined)
return this;
if (list === listener || list.listener === listener) {
if (--this._eventsCount === 0)
this._events = Object.create(null);
else {
delete events[type];
if (events.removeListener)
this.emit('removeListener', type, list.listener || listener);
}
} else if (typeof list !== 'function') {
position = -1;
for (i = list.length - 1; i >= 0; i--) {
if (list[i] === listener || list[i].listener === listener) {
originalListener = list[i].listener;
position = i;
break;
}
}
if (position < 0)
return this;
if (position === 0)
list.shift();
else {
spliceOne(list, position);
}
if (list.length === 1)
events[type] = list[0];
if (events.removeListener !== undefined)
this.emit('removeListener', type, originalListener || listener);
}
return this;
};
EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
EventEmitter.prototype.removeAllListeners =
function removeAllListeners(type) {
var listeners, events, i;
events = this._events;
if (events === undefined)
return this;
// not listening for removeListener, no need to emit
if (events.removeListener === undefined) {
if (arguments.length === 0) {
this._events = Object.create(null);
this._eventsCount = 0;
} else if (events[type] !== undefined) {
if (--this._eventsCount === 0)
this._events = Object.create(null);
else
delete events[type];
}
return this;
}
// emit removeListener for all listeners on all events
if (arguments.length === 0) {
var keys = Object.keys(events);
var key;
for (i = 0; i < keys.length; ++i) {
key = keys[i];
if (key === 'removeListener') continue;
this.removeAllListeners(key);
}
this.removeAllListeners('removeListener');
this._events = Object.create(null);
this._eventsCount = 0;
return this;
}
listeners = events[type];
if (typeof listeners === 'function') {
this.removeListener(type, listeners);
} else if (listeners !== undefined) {
// LIFO order
for (i = listeners.length - 1; i >= 0; i--) {
this.removeListener(type, listeners[i]);
}
}
return this;
};
function _listeners(target, type, unwrap) {
var events = target._events;
if (events === undefined)
return [];
var evlistener = events[type];
if (evlistener === undefined)
return [];
if (typeof evlistener === 'function')
return unwrap ? [evlistener.listener || evlistener] : [evlistener];
return unwrap ?
unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
}
EventEmitter.prototype.listeners = function listeners(type) {
return _listeners(this, type, true);
};
EventEmitter.prototype.rawListeners = function rawListeners(type) {
return _listeners(this, type, false);
};
EventEmitter.listenerCount = function(emitter, type) {
if (typeof emitter.listenerCount === 'function') {
return emitter.listenerCount(type);
} else {
return listenerCount.call(emitter, type);
}
};
EventEmitter.prototype.listenerCount = listenerCount;
function listenerCount(type) {
var events = this._events;
if (events !== undefined) {
var evlistener = events[type];
if (typeof evlistener === 'function') {
return 1;
} else if (evlistener !== undefined) {
return evlistener.length;
}
}
return 0;
}
EventEmitter.prototype.eventNames = function eventNames() {
return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
};
function arrayClone(arr, n) {
var copy = new Array(n);
for (var i = 0; i < n; ++i)
copy[i] = arr[i];
return copy;
}
function spliceOne(list, index) {
for (; index + 1 < list.length; index++)
list[index] = list[index + 1];
list.pop();
}
function unwrapListeners(arr) {
var ret = new Array(arr.length);
for (var i = 0; i < ret.length; ++i) {
ret[i] = arr[i].listener || arr[i];
}
return ret;
}
/***/ }),
/* 5 */
/***/ (function(module, exports, __webpack_require__) {
const SHA256 = __webpack_require__(6);
/**
* SHA256 Hashing.
*
* @param {String} [salt=''] salt.
* @param {String} [challenge=''] challenge.
* @param {String} msg Message to encode.
* @return {String} sha256 encoded string.
*/
// eslint-disable-next-line default-param-last
module.exports = function (salt = '', challenge = '', msg) {
const hash = new SHA256()
.update(msg)
.update(salt)
.digest('base64');
const resp = new SHA256()
.update(hash)
.update(challenge)
.digest('base64');
return resp;
};
/***/ }),
/* 6 */
/***/ (function(module, exports, __webpack_require__) {
/**
* A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
* in FIPS 180-2
* Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
*
*/
var inherits = __webpack_require__(7)
var Hash = __webpack_require__(8)
var Buffer = __webpack_require__(9).Buffer
var K = [
0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2
]
var W = new Array(64)
function Sha256 () {
this.init()
this._w = W // new Array(64)
Hash.call(this, 64, 56)
}
inherits(Sha256, Hash)
Sha256.prototype.init = function () {
this._a = 0x6a09e667
this._b = 0xbb67ae85
this._c = 0x3c6ef372
this._d = 0xa54ff53a
this._e = 0x510e527f
this._f = 0x9b05688c
this._g = 0x1f83d9ab
this._h = 0x5be0cd19
return this
}
function ch (x, y, z) {
return z ^ (x & (y ^ z))
}
function maj (x, y, z) {
return (x & y) | (z & (x | y))
}
function sigma0 (x) {
return (x >>> 2 | x << 30) ^ (x >>> 13 | x << 19) ^ (x >>> 22 | x << 10)
}
function sigma1 (x) {
return (x >>> 6 | x << 26) ^ (x >>> 11 | x << 21) ^ (x >>> 25 | x << 7)
}
function gamma0 (x) {