pkce-x
Version:
PKCE is a security extension to OAuth 2.0 for public clients on mobile devices, designed to prevent interception of the authorisation code by a malicious application that has sneaked into the same device.
213 lines (212 loc) • 10.7 kB
JavaScript
"use strict";
/*!
* pkce-x
* Copyright(c) 2022 Nadeen Gamage
* MIT Licensed
*/
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 (_) 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 };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var sha256_1 = __importDefault(require("crypto-js/sha256"));
var enc_base64_1 = __importDefault(require("crypto-js/enc-base64"));
var lib_typedarrays_1 = __importDefault(require("crypto-js/lib-typedarrays"));
var AuthService = /** @class */ (function () {
function AuthService(config) {
this.state = '';
this.codeVerifier = '';
this.config = config;
}
AuthService.prototype.authorize = function (additionalParams) {
if (additionalParams === void 0) { additionalParams = {}; }
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
if (this.getCodeFromUrl() === null) {
window.location.replace("".concat(this.config.authorization_endpoint, "?").concat(this.getQueryString(additionalParams)));
}
return [2 /*return*/];
});
});
};
AuthService.prototype.exchange = function (additionalParams) {
if (additionalParams === void 0) { additionalParams = {}; }
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
return [2 /*return*/, this.parseAuthResponseUrl(window.location.href).then(function (q) { return __awaiter(_this, void 0, void 0, function () {
var response;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, fetch(this.config.token_endpoint, {
method: 'POST',
body: new URLSearchParams(Object.assign({
grant_type: 'authorization_code',
code: q.code,
client_id: this.config.client_id,
redirect_uri: this.config.redirect_uri,
code_verifier: this.getCodeVerifier(),
}, additionalParams)),
headers: this.getHeaders(),
})];
case 1:
response = _a.sent();
if (response.status === 200) {
response.clone().json().then(function (data) {
_this.getStore().setItem('access_token', data.access_token);
_this.getStore().setItem('refresh_token', (data.refresh_token !== undefined ? data.refresh_token : null));
_this.getStore().setItem('expires_in', data.expires_in);
_this.getStore().setItem('scope', data.scope);
_this.getStore().setItem('token_type', data.token_type);
});
}
if (response.status !== 200) {
window.location.replace("".concat(this.config.authorization_endpoint, "?").concat(this.getQueryString(additionalParams)));
}
return [2 /*return*/, response.json()];
}
});
}); })];
});
});
};
AuthService.prototype.getAccessToken = function () {
return this.getStore().getItem('access_token') || null;
};
AuthService.prototype.getRefreshToken = function () {
return this.getStore().getItem('refresh_token') || null;
};
AuthService.prototype.getExpiresIn = function () {
return parseInt(this.getStore().getItem('expires_in') || '0', 10);
};
AuthService.prototype.getScope = function () {
return this.getStore().getItem('scope') || null;
};
AuthService.prototype.getQueryString = function (additionalParams) {
if (additionalParams === void 0) { additionalParams = {}; }
var codeChallenge = this.pkceChallengeFromVerifier();
var queryString = new URLSearchParams(Object.assign({
response_type: 'code',
client_id: this.config.client_id,
state: this.getState(additionalParams.state || null),
scope: this.config.requested_scopes,
redirect_uri: this.config.redirect_uri,
code_challenge: codeChallenge,
code_challenge_method: 'S256',
}, additionalParams)).toString();
return queryString;
};
AuthService.prototype.parseAuthResponseUrl = function (url) {
var params = new URL(url).searchParams;
return this.validateAuthResponse({
error: params.get('error'),
query: params.get('query'),
state: params.get('state'),
code: params.get('code'),
});
};
AuthService.prototype.getHeaders = function () {
if (this.config.client_secret) {
return {
Accept: 'application/json',
'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',
'Authorization': "Basic ".concat(this.getEncodedCredentials()),
};
}
else {
return {
Accept: 'application/json',
'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',
};
}
};
AuthService.prototype.getCodeFromUrl = function () {
var params = new URL(window.location.href).searchParams;
return params.get('code') || null;
};
AuthService.prototype.getEncodedCredentials = function () {
return btoa("".concat(this.config.client_id, ":").concat(this.config.client_secret));
};
AuthService.prototype.validateAuthResponse = function (queryParams) {
var _this = this;
return new Promise(function (resolve, reject) {
if (queryParams.error) {
return reject({ error: queryParams.error });
}
if (queryParams.state !== _this.getState()) {
return reject({ error: 'Invalid State' });
}
return resolve(queryParams);
});
};
AuthService.prototype.pkceChallengeFromVerifier = function () {
var hashed = (0, sha256_1.default)(this.getCodeVerifier());
return enc_base64_1.default.stringify(hashed).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
};
AuthService.prototype.getCodeVerifier = function () {
if (this.codeVerifier === '') {
this.codeVerifier = this.randomStringFromStorage('pkce_code_verifier');
}
return this.codeVerifier;
};
AuthService.prototype.getState = function (state) {
if (state === void 0) { state = null; }
var stateKey = 'pkce_state';
if (state !== null) {
this.getStore().setItem(stateKey, state);
}
if (this.state === '') {
this.state = this.randomStringFromStorage(stateKey);
}
return this.state;
};
AuthService.prototype.randomStringFromStorage = function (key) {
var fromStorage = this.getStore().getItem(key);
if (fromStorage === null) {
this.getStore().setItem(key, lib_typedarrays_1.default.random(64));
}
return this.getStore().getItem(key) || '';
};
AuthService.prototype.getStore = function () {
var _a;
return ((_a = this.config) === null || _a === void 0 ? void 0 : _a.storage) || sessionStorage;
};
return AuthService;
}());
exports.default = AuthService;