@novnc/novnc
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An HTML5 VNC client
481 lines (480 loc) • 27.4 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.AESECBCipher = exports.AESEAXCipher = void 0;
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
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function _asyncToGenerator(n) { return function () { var t = this, e = arguments; return new Promise(function (r, o) { var a = n.apply(t, e); function _next(n) { asyncGeneratorStep(a, r, o, _next, _throw, "next", n); } function _throw(n) { asyncGeneratorStep(a, r, o, _next, _throw, "throw", n); } _next(void 0); }); }; }
function _classCallCheck(a, n) { if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function"); }
function _defineProperties(e, r) { for (var t = 0; t < r.length; t++) { var o = r[t]; o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, _toPropertyKey(o.key), o); } }
function _createClass(e, r, t) { return r && _defineProperties(e.prototype, r), t && _defineProperties(e, t), Object.defineProperty(e, "prototype", { writable: !1 }), e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
var AESECBCipher = exports.AESECBCipher = /*#__PURE__*/function () {
function AESECBCipher() {
_classCallCheck(this, AESECBCipher);
this._key = null;
}
return _createClass(AESECBCipher, [{
key: "algorithm",
get: function get() {
return {
name: "AES-ECB"
};
}
}, {
key: "_importKey",
value: function () {
var _importKey2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee(key, extractable, keyUsages) {
return _regeneratorRuntime().wrap(function _callee$(_context) {
while (1) switch (_context.prev = _context.next) {
case 0:
_context.next = 2;
return window.crypto.subtle.importKey("raw", key, {
name: "AES-CBC"
}, extractable, keyUsages);
case 2:
this._key = _context.sent;
case 3:
case "end":
return _context.stop();
}
}, _callee, this);
}));
function _importKey(_x, _x2, _x3) {
return _importKey2.apply(this, arguments);
}
return _importKey;
}()
}, {
key: "encrypt",
value: function () {
var _encrypt = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee2(_algorithm, plaintext) {
var x, n, i, y;
return _regeneratorRuntime().wrap(function _callee2$(_context2) {
while (1) switch (_context2.prev = _context2.next) {
case 0:
x = new Uint8Array(plaintext);
if (!(x.length % 16 !== 0 || this._key === null)) {
_context2.next = 3;
break;
}
return _context2.abrupt("return", null);
case 3:
n = x.length / 16;
i = 0;
case 5:
if (!(i < n)) {
_context2.next = 15;
break;
}
_context2.t0 = Uint8Array;
_context2.next = 9;
return window.crypto.subtle.encrypt({
name: "AES-CBC",
iv: new Uint8Array(16)
}, this._key, x.slice(i * 16, i * 16 + 16));
case 9:
_context2.t1 = _context2.sent;
y = new _context2.t0(_context2.t1).slice(0, 16);
x.set(y, i * 16);
case 12:
i++;
_context2.next = 5;
break;
case 15:
return _context2.abrupt("return", x);
case 16:
case "end":
return _context2.stop();
}
}, _callee2, this);
}));
function encrypt(_x4, _x5) {
return _encrypt.apply(this, arguments);
}
return encrypt;
}()
}], [{
key: "importKey",
value: function () {
var _importKey3 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee3(key, _algorithm, extractable, keyUsages) {
var cipher;
return _regeneratorRuntime().wrap(function _callee3$(_context3) {
while (1) switch (_context3.prev = _context3.next) {
case 0:
cipher = new AESECBCipher();
_context3.next = 3;
return cipher._importKey(key, extractable, keyUsages);
case 3:
return _context3.abrupt("return", cipher);
case 4:
case "end":
return _context3.stop();
}
}, _callee3);
}));
function importKey(_x6, _x7, _x8, _x9) {
return _importKey3.apply(this, arguments);
}
return importKey;
}()
}]);
}();
var AESEAXCipher = exports.AESEAXCipher = /*#__PURE__*/function () {
function AESEAXCipher() {
_classCallCheck(this, AESEAXCipher);
this._rawKey = null;
this._ctrKey = null;
this._cbcKey = null;
this._zeroBlock = new Uint8Array(16);
this._prefixBlock0 = this._zeroBlock;
this._prefixBlock1 = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]);
this._prefixBlock2 = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2]);
}
return _createClass(AESEAXCipher, [{
key: "algorithm",
get: function get() {
return {
name: "AES-EAX"
};
}
}, {
key: "_encryptBlock",
value: function () {
var _encryptBlock2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee4(block) {
var encrypted;
return _regeneratorRuntime().wrap(function _callee4$(_context4) {
while (1) switch (_context4.prev = _context4.next) {
case 0:
_context4.next = 2;
return window.crypto.subtle.encrypt({
name: "AES-CBC",
iv: this._zeroBlock
}, this._cbcKey, block);
case 2:
encrypted = _context4.sent;
return _context4.abrupt("return", new Uint8Array(encrypted).slice(0, 16));
case 4:
case "end":
return _context4.stop();
}
}, _callee4, this);
}));
function _encryptBlock(_x10) {
return _encryptBlock2.apply(this, arguments);
}
return _encryptBlock;
}()
}, {
key: "_initCMAC",
value: function () {
var _initCMAC2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee5() {
var k1, k2, v, i, lut;
return _regeneratorRuntime().wrap(function _callee5$(_context5) {
while (1) switch (_context5.prev = _context5.next) {
case 0:
_context5.next = 2;
return this._encryptBlock(this._zeroBlock);
case 2:
k1 = _context5.sent;
k2 = new Uint8Array(16);
v = k1[0] >>> 6;
for (i = 0; i < 15; i++) {
k2[i] = k1[i + 1] >> 6 | k1[i] << 2;
k1[i] = k1[i + 1] >> 7 | k1[i] << 1;
}
lut = [0x0, 0x87, 0x0e, 0x89];
k2[14] ^= v >>> 1;
k2[15] = k1[15] << 2 ^ lut[v];
k1[15] = k1[15] << 1 ^ lut[v >> 1];
this._k1 = k1;
this._k2 = k2;
case 12:
case "end":
return _context5.stop();
}
}, _callee5, this);
}));
function _initCMAC() {
return _initCMAC2.apply(this, arguments);
}
return _initCMAC;
}()
}, {
key: "_encryptCTR",
value: function () {
var _encryptCTR2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee6(data, counter) {
var encrypted;
return _regeneratorRuntime().wrap(function _callee6$(_context6) {
while (1) switch (_context6.prev = _context6.next) {
case 0:
_context6.next = 2;
return window.crypto.subtle.encrypt({
name: "AES-CTR",
counter: counter,
length: 128
}, this._ctrKey, data);
case 2:
encrypted = _context6.sent;
return _context6.abrupt("return", new Uint8Array(encrypted));
case 4:
case "end":
return _context6.stop();
}
}, _callee6, this);
}));
function _encryptCTR(_x11, _x12) {
return _encryptCTR2.apply(this, arguments);
}
return _encryptCTR;
}()
}, {
key: "_decryptCTR",
value: function () {
var _decryptCTR2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee7(data, counter) {
var decrypted;
return _regeneratorRuntime().wrap(function _callee7$(_context7) {
while (1) switch (_context7.prev = _context7.next) {
case 0:
_context7.next = 2;
return window.crypto.subtle.decrypt({
name: "AES-CTR",
counter: counter,
length: 128
}, this._ctrKey, data);
case 2:
decrypted = _context7.sent;
return _context7.abrupt("return", new Uint8Array(decrypted));
case 4:
case "end":
return _context7.stop();
}
}, _callee7, this);
}));
function _decryptCTR(_x13, _x14) {
return _decryptCTR2.apply(this, arguments);
}
return _decryptCTR;
}()
}, {
key: "_computeCMAC",
value: function () {
var _computeCMAC2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee8(data, prefixBlock) {
var n, m, r, cbcData, i, _i, cbcEncrypted, mac;
return _regeneratorRuntime().wrap(function _callee8$(_context8) {
while (1) switch (_context8.prev = _context8.next) {
case 0:
if (!(prefixBlock.length !== 16)) {
_context8.next = 2;
break;
}
return _context8.abrupt("return", null);
case 2:
n = Math.floor(data.length / 16);
m = Math.ceil(data.length / 16);
r = data.length - n * 16;
cbcData = new Uint8Array((m + 1) * 16);
cbcData.set(prefixBlock);
cbcData.set(data, 16);
if (r === 0) {
for (i = 0; i < 16; i++) {
cbcData[n * 16 + i] ^= this._k1[i];
}
} else {
cbcData[(n + 1) * 16 + r] = 0x80;
for (_i = 0; _i < 16; _i++) {
cbcData[(n + 1) * 16 + _i] ^= this._k2[_i];
}
}
_context8.next = 11;
return window.crypto.subtle.encrypt({
name: "AES-CBC",
iv: this._zeroBlock
}, this._cbcKey, cbcData);
case 11:
cbcEncrypted = _context8.sent;
cbcEncrypted = new Uint8Array(cbcEncrypted);
mac = cbcEncrypted.slice(cbcEncrypted.length - 32, cbcEncrypted.length - 16);
return _context8.abrupt("return", mac);
case 15:
case "end":
return _context8.stop();
}
}, _callee8, this);
}));
function _computeCMAC(_x15, _x16) {
return _computeCMAC2.apply(this, arguments);
}
return _computeCMAC;
}()
}, {
key: "_importKey",
value: function () {
var _importKey4 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee9(key) {
return _regeneratorRuntime().wrap(function _callee9$(_context9) {
while (1) switch (_context9.prev = _context9.next) {
case 0:
this._rawKey = key;
_context9.next = 3;
return window.crypto.subtle.importKey("raw", key, {
name: "AES-CTR"
}, false, ["encrypt", "decrypt"]);
case 3:
this._ctrKey = _context9.sent;
_context9.next = 6;
return window.crypto.subtle.importKey("raw", key, {
name: "AES-CBC"
}, false, ["encrypt"]);
case 6:
this._cbcKey = _context9.sent;
_context9.next = 9;
return this._initCMAC();
case 9:
case "end":
return _context9.stop();
}
}, _callee9, this);
}));
function _importKey(_x17) {
return _importKey4.apply(this, arguments);
}
return _importKey;
}()
}, {
key: "encrypt",
value: function () {
var _encrypt2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee10(algorithm, message) {
var ad, nonce, nCMAC, encrypted, adCMAC, mac, i, res;
return _regeneratorRuntime().wrap(function _callee10$(_context10) {
while (1) switch (_context10.prev = _context10.next) {
case 0:
ad = algorithm.additionalData;
nonce = algorithm.iv;
_context10.next = 4;
return this._computeCMAC(nonce, this._prefixBlock0);
case 4:
nCMAC = _context10.sent;
_context10.next = 7;
return this._encryptCTR(message, nCMAC);
case 7:
encrypted = _context10.sent;
_context10.next = 10;
return this._computeCMAC(ad, this._prefixBlock1);
case 10:
adCMAC = _context10.sent;
_context10.next = 13;
return this._computeCMAC(encrypted, this._prefixBlock2);
case 13:
mac = _context10.sent;
for (i = 0; i < 16; i++) {
mac[i] ^= nCMAC[i] ^ adCMAC[i];
}
res = new Uint8Array(16 + encrypted.length);
res.set(encrypted);
res.set(mac, encrypted.length);
return _context10.abrupt("return", res);
case 19:
case "end":
return _context10.stop();
}
}, _callee10, this);
}));
function encrypt(_x18, _x19) {
return _encrypt2.apply(this, arguments);
}
return encrypt;
}()
}, {
key: "decrypt",
value: function () {
var _decrypt = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee11(algorithm, data) {
var encrypted, ad, nonce, mac, nCMAC, adCMAC, computedMac, i, _i2, res;
return _regeneratorRuntime().wrap(function _callee11$(_context11) {
while (1) switch (_context11.prev = _context11.next) {
case 0:
encrypted = data.slice(0, data.length - 16);
ad = algorithm.additionalData;
nonce = algorithm.iv;
mac = data.slice(data.length - 16);
_context11.next = 6;
return this._computeCMAC(nonce, this._prefixBlock0);
case 6:
nCMAC = _context11.sent;
_context11.next = 9;
return this._computeCMAC(ad, this._prefixBlock1);
case 9:
adCMAC = _context11.sent;
_context11.next = 12;
return this._computeCMAC(encrypted, this._prefixBlock2);
case 12:
computedMac = _context11.sent;
for (i = 0; i < 16; i++) {
computedMac[i] ^= nCMAC[i] ^ adCMAC[i];
}
if (!(computedMac.length !== mac.length)) {
_context11.next = 16;
break;
}
return _context11.abrupt("return", null);
case 16:
_i2 = 0;
case 17:
if (!(_i2 < mac.length)) {
_context11.next = 23;
break;
}
if (!(computedMac[_i2] !== mac[_i2])) {
_context11.next = 20;
break;
}
return _context11.abrupt("return", null);
case 20:
_i2++;
_context11.next = 17;
break;
case 23:
_context11.next = 25;
return this._decryptCTR(encrypted, nCMAC);
case 25:
res = _context11.sent;
return _context11.abrupt("return", res);
case 27:
case "end":
return _context11.stop();
}
}, _callee11, this);
}));
function decrypt(_x20, _x21) {
return _decrypt.apply(this, arguments);
}
return decrypt;
}()
}], [{
key: "importKey",
value: function () {
var _importKey5 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee12(key, _algorithm, _extractable, _keyUsages) {
var cipher;
return _regeneratorRuntime().wrap(function _callee12$(_context12) {
while (1) switch (_context12.prev = _context12.next) {
case 0:
cipher = new AESEAXCipher();
_context12.next = 3;
return cipher._importKey(key);
case 3:
return _context12.abrupt("return", cipher);
case 4:
case "end":
return _context12.stop();
}
}, _callee12);
}));
function importKey(_x22, _x23, _x24, _x25) {
return _importKey5.apply(this, arguments);
}
return importKey;
}()
}]);
}();