@novnc/novnc
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An HTML5 VNC client
312 lines (311 loc) • 21.6 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.RSACipher = void 0;
var _base = _interopRequireDefault(require("../base64.js"));
var _bigint = require("./bigint.js");
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
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 _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); } }
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var RSACipher = exports.RSACipher = /*#__PURE__*/function () {
function RSACipher() {
_classCallCheck(this, RSACipher);
this._keyLength = 0;
this._keyBytes = 0;
this._n = null;
this._e = null;
this._d = null;
this._nBigInt = null;
this._eBigInt = null;
this._dBigInt = null;
this._extractable = false;
}
return _createClass(RSACipher, [{
key: "algorithm",
get: function get() {
return {
name: "RSA-PKCS1-v1_5"
};
}
}, {
key: "_base64urlDecode",
value: function _base64urlDecode(data) {
data = data.replace(/-/g, "+").replace(/_/g, "/");
data = data.padEnd(Math.ceil(data.length / 4) * 4, "=");
return _base["default"].decode(data);
}
}, {
key: "_padArray",
value: function _padArray(arr, length) {
var res = new Uint8Array(length);
res.set(arr, length - arr.length);
return res;
}
}, {
key: "_generateKey",
value: function () {
var _generateKey2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee(algorithm, extractable) {
var key, privateKey;
return _regeneratorRuntime().wrap(function _callee$(_context) {
while (1) switch (_context.prev = _context.next) {
case 0:
this._keyLength = algorithm.modulusLength;
this._keyBytes = Math.ceil(this._keyLength / 8);
_context.next = 4;
return window.crypto.subtle.generateKey({
name: "RSA-OAEP",
modulusLength: algorithm.modulusLength,
publicExponent: algorithm.publicExponent,
hash: {
name: "SHA-256"
}
}, true, ["encrypt", "decrypt"]);
case 4:
key = _context.sent;
_context.next = 7;
return window.crypto.subtle.exportKey("jwk", key.privateKey);
case 7:
privateKey = _context.sent;
this._n = this._padArray(this._base64urlDecode(privateKey.n), this._keyBytes);
this._nBigInt = (0, _bigint.u8ArrayToBigInt)(this._n);
this._e = this._padArray(this._base64urlDecode(privateKey.e), this._keyBytes);
this._eBigInt = (0, _bigint.u8ArrayToBigInt)(this._e);
this._d = this._padArray(this._base64urlDecode(privateKey.d), this._keyBytes);
this._dBigInt = (0, _bigint.u8ArrayToBigInt)(this._d);
this._extractable = extractable;
case 15:
case "end":
return _context.stop();
}
}, _callee, this);
}));
function _generateKey(_x, _x2) {
return _generateKey2.apply(this, arguments);
}
return _generateKey;
}()
}, {
key: "_importKey",
value: function () {
var _importKey2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee2(key, extractable) {
var n, e;
return _regeneratorRuntime().wrap(function _callee2$(_context2) {
while (1) switch (_context2.prev = _context2.next) {
case 0:
n = key.n;
e = key.e;
if (!(n.length !== e.length)) {
_context2.next = 4;
break;
}
throw new Error("the sizes of modulus and public exponent do not match");
case 4:
this._keyBytes = n.length;
this._keyLength = this._keyBytes * 8;
this._n = new Uint8Array(this._keyBytes);
this._e = new Uint8Array(this._keyBytes);
this._n.set(n);
this._e.set(e);
this._nBigInt = (0, _bigint.u8ArrayToBigInt)(this._n);
this._eBigInt = (0, _bigint.u8ArrayToBigInt)(this._e);
this._extractable = extractable;
case 13:
case "end":
return _context2.stop();
}
}, _callee2, this);
}));
function _importKey(_x3, _x4) {
return _importKey2.apply(this, arguments);
}
return _importKey;
}()
}, {
key: "encrypt",
value: function () {
var _encrypt = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee3(_algorithm, message) {
var ps, i, em, emBigInt, c;
return _regeneratorRuntime().wrap(function _callee3$(_context3) {
while (1) switch (_context3.prev = _context3.next) {
case 0:
if (!(message.length > this._keyBytes - 11)) {
_context3.next = 2;
break;
}
return _context3.abrupt("return", null);
case 2:
ps = new Uint8Array(this._keyBytes - message.length - 3);
window.crypto.getRandomValues(ps);
for (i = 0; i < ps.length; i++) {
ps[i] = Math.floor(ps[i] * 254 / 255 + 1);
}
em = new Uint8Array(this._keyBytes);
em[1] = 0x02;
em.set(ps, 2);
em.set(message, ps.length + 3);
emBigInt = (0, _bigint.u8ArrayToBigInt)(em);
c = (0, _bigint.modPow)(emBigInt, this._eBigInt, this._nBigInt);
return _context3.abrupt("return", (0, _bigint.bigIntToU8Array)(c, this._keyBytes));
case 12:
case "end":
return _context3.stop();
}
}, _callee3, this);
}));
function encrypt(_x5, _x6) {
return _encrypt.apply(this, arguments);
}
return encrypt;
}()
}, {
key: "decrypt",
value: function () {
var _decrypt = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee4(_algorithm, message) {
var msgBigInt, emBigInt, em, i;
return _regeneratorRuntime().wrap(function _callee4$(_context4) {
while (1) switch (_context4.prev = _context4.next) {
case 0:
if (!(message.length !== this._keyBytes)) {
_context4.next = 2;
break;
}
return _context4.abrupt("return", null);
case 2:
msgBigInt = (0, _bigint.u8ArrayToBigInt)(message);
emBigInt = (0, _bigint.modPow)(msgBigInt, this._dBigInt, this._nBigInt);
em = (0, _bigint.bigIntToU8Array)(emBigInt, this._keyBytes);
if (!(em[0] !== 0x00 || em[1] !== 0x02)) {
_context4.next = 7;
break;
}
return _context4.abrupt("return", null);
case 7:
i = 2;
case 8:
if (!(i < em.length)) {
_context4.next = 14;
break;
}
if (!(em[i] === 0x00)) {
_context4.next = 11;
break;
}
return _context4.abrupt("break", 14);
case 11:
i++;
_context4.next = 8;
break;
case 14:
if (!(i === em.length)) {
_context4.next = 16;
break;
}
return _context4.abrupt("return", null);
case 16:
return _context4.abrupt("return", em.slice(i + 1, em.length));
case 17:
case "end":
return _context4.stop();
}
}, _callee4, this);
}));
function decrypt(_x7, _x8) {
return _decrypt.apply(this, arguments);
}
return decrypt;
}()
}, {
key: "exportKey",
value: function () {
var _exportKey = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee5() {
return _regeneratorRuntime().wrap(function _callee5$(_context5) {
while (1) switch (_context5.prev = _context5.next) {
case 0:
if (this._extractable) {
_context5.next = 2;
break;
}
throw new Error("key is not extractable");
case 2:
return _context5.abrupt("return", {
n: this._n,
e: this._e,
d: this._d
});
case 3:
case "end":
return _context5.stop();
}
}, _callee5, this);
}));
function exportKey() {
return _exportKey.apply(this, arguments);
}
return exportKey;
}()
}], [{
key: "generateKey",
value: function () {
var _generateKey3 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee6(algorithm, extractable, _keyUsages) {
var cipher;
return _regeneratorRuntime().wrap(function _callee6$(_context6) {
while (1) switch (_context6.prev = _context6.next) {
case 0:
cipher = new RSACipher();
_context6.next = 3;
return cipher._generateKey(algorithm, extractable);
case 3:
return _context6.abrupt("return", {
privateKey: cipher
});
case 4:
case "end":
return _context6.stop();
}
}, _callee6);
}));
function generateKey(_x9, _x10, _x11) {
return _generateKey3.apply(this, arguments);
}
return generateKey;
}()
}, {
key: "importKey",
value: function () {
var _importKey3 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee7(key, _algorithm, extractable, keyUsages) {
var cipher;
return _regeneratorRuntime().wrap(function _callee7$(_context7) {
while (1) switch (_context7.prev = _context7.next) {
case 0:
if (!(keyUsages.length !== 1 || keyUsages[0] !== "encrypt")) {
_context7.next = 2;
break;
}
throw new Error("only support importing RSA public key");
case 2:
cipher = new RSACipher();
_context7.next = 5;
return cipher._importKey(key, extractable);
case 5:
return _context7.abrupt("return", cipher);
case 6:
case "end":
return _context7.stop();
}
}, _callee7);
}));
function importKey(_x12, _x13, _x14, _x15) {
return _importKey3.apply(this, arguments);
}
return importKey;
}()
}]);
}();