text: "use strict";
  /**
   * Copyright 2014 Google Inc. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
      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) : new P(function (resolve) { resolve(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 = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
              if (y = 0, t) op = [0, 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 };
  };
  var __importStar = (this && this.__importStar) || function (mod) {
      if (mod && mod.__esModule) return mod;
      var result = {};
      if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
      result["default"] = mod;
      return result;
  };
  Object.defineProperty(exports, "__esModule", { value: true });
  var child_process_1 = require("child_process");
  var crypto_1 = __importDefault(require("crypto"));
  var fs_1 = __importDefault(require("fs"));
  var gcpMetadata = __importStar(require("gcp-metadata"));
  var os_1 = __importDefault(require("os"));
  var path_1 = __importDefault(require("path"));
  var util_1 = __importDefault(require("util"));
  var transporters_1 = require("../transporters");
  var computeclient_1 = require("./computeclient");
  var envDetect_1 = require("./envDetect");
  var jwtclient_1 = require("./jwtclient");
  var refreshclient_1 = require("./refreshclient");
  var GoogleAuth = /** @class */ (function () {
      function GoogleAuth(opts) {
          // This shim is in place for compatibility with google-auto-auth.
          this.getProjectId = this.getDefaultProjectId;
          /**
           * Caches a value indicating whether the auth layer is running on Google
           * Compute Engine.
           * @private
           */
          this.checkIsGCE = undefined;
          // To save the contents of the JSON credential file
          this.jsonContent = null;
          this.cachedCredential = null;
          opts = opts || {};
          this._cachedProjectId = opts.projectId || null;
          this.keyFilename = opts.keyFilename || opts.keyFile;
          this.scopes = opts.scopes;
          this.jsonContent = opts.credentials || null;
      }
      Object.defineProperty(GoogleAuth.prototype, "isGCE", {
          // Note:  this properly is only public to satisify unit tests.
          // https://github.com/Microsoft/TypeScript/issues/5228
          get: function () {
              return this.checkIsGCE;
          },
          enumerable: true,
          configurable: true
      });
      GoogleAuth.prototype.getDefaultProjectId = function (callback) {
          if (callback) {
              this.getDefaultProjectIdAsync()
                  .then(function (r) { return callback(null, r); })
                  .catch(callback);
          }
          else {
              return this.getDefaultProjectIdAsync();
          }
      };
      GoogleAuth.prototype.getDefaultProjectIdAsync = function () {
          var _this = this;
          if (this._cachedProjectId) {
              return Promise.resolve(this._cachedProjectId);
          }
          // In implicit case, supports three environments. In order of precedence,
          // the implicit environments are:
          // - GCLOUD_PROJECT or GOOGLE_CLOUD_PROJECT environment variable
          // - GOOGLE_APPLICATION_CREDENTIALS JSON file
          // - Cloud SDK: `gcloud config config-helper --format json`
          // - GCE project ID from metadata server)
          if (!this._getDefaultProjectIdPromise) {
              this._getDefaultProjectIdPromise =
                  new Promise(function (resolve, reject) { return __awaiter(_this, void 0, void 0, function () {
                      var projectId, _a, _b, _c, e_1;
                      return __generator(this, function (_d) {
                          switch (_d.label) {
                              case 0:
                                  _d.trys.push([0, 7, , 8]);
                                  _c = this.getProductionProjectId();
                                  if (_c) return [3 /*break*/, 2];
                                  return [4 /*yield*/, this.getFileProjectId()];
                              case 1:
                                  _c = (_d.sent());
                                  _d.label = 2;
                              case 2:
                                  _b = _c;
                                  if (_b) return [3 /*break*/, 4];
                                  return [4 /*yield*/, this.getDefaultServiceProjectId()];
                              case 3:
                                  _b = (_d.sent());
                                  _d.label = 4;
                              case 4:
                                  _a = _b;
                                  if (_a) return [3 /*break*/, 6];
                                  return [4 /*yield*/, this.getGCEProjectId()];
                              case 5:
                                  _a = (_d.sent());
                                  _d.label = 6;
                              case 6:
                                  projectId = _a;
                                  this._cachedProjectId = projectId;
                                  resolve(projectId);
                                  return [3 /*break*/, 8];
                              case 7:
                                  e_1 = _d.sent();
                                  reject(e_1);
                                  return [3 /*break*/, 8];
                              case 8: return [2 /*return*/];
                          }
                      });
                  }); });
          }
          return this._getDefaultProjectIdPromise;
      };
      GoogleAuth.prototype.getApplicationDefault = function (optionsOrCallback, callback) {
          if (optionsOrCallback === void 0) { optionsOrCallback = {}; }
          var options;
          if (typeof optionsOrCallback === 'function') {
              callback = optionsOrCallback;
          }
          else {
              options = optionsOrCallback;
          }
          if (callback) {
              this.getApplicationDefaultAsync(options)
                  .then(function (r) { return callback(null, r.credential, r.projectId); })
                  .catch(callback);
          }
          else {
              return this.getApplicationDefaultAsync(options);
          }
      };
      GoogleAuth.prototype.getApplicationDefaultAsync = function (options) {
          return __awaiter(this, void 0, void 0, function () {
              var _a, credential, projectId, gce, e_2;
              return __generator(this, function (_b) {
                  switch (_b.label) {
                      case 0:
                          if (!this.cachedCredential) return [3 /*break*/, 2];
                          _a = {
                              credential: this.cachedCredential
                          };
                          return [4 /*yield*/, this.getDefaultProjectIdAsync()];
                      case 1: return [2 /*return*/, (_a.projectId = _b.sent(),
                              _a)];
                      case 2: return [4 /*yield*/, this._tryGetApplicationCredentialsFromEnvironmentVariable(options)];
                      case 3:
                          // Check for the existence of a local environment variable pointing to the
                          // location of the credential file. This is typically used in local
                          // developer scenarios.
                          credential =
                              _b.sent();
                          if (!credential) return [3 /*break*/, 5];
                          if (credential instanceof jwtclient_1.JWT) {
                              credential.scopes = this.scopes;
                          }
                          this.cachedCredential = credential;
                          return [4 /*yield*/, this.getDefaultProjectId()];
                      case 4:
                          projectId = _b.sent();
                          return [2 /*return*/, { credential: credential, projectId: projectId }];
                      case 5: return [4 /*yield*/, this._tryGetApplicationCredentialsFromWellKnownFile(options)];
                      case 6:
                          // Look in the well-known credential file location.
                          credential =
                              _b.sent();
                          if (!credential) return [3 /*break*/, 8];
                          if (credential instanceof jwtclient_1.JWT) {
                              credential.scopes = this.scopes;
                          }
                          this.cachedCredential = credential;
                          return [4 /*yield*/, this.getDefaultProjectId()];
                      case 7:
                          projectId = _b.sent();
                          return [2 /*return*/, { credential: credential, projectId: projectId }];
                      case 8:
                          _b.trys.push([8, 13, , 14]);
                          return [4 /*yield*/, this._checkIsGCE()];
                      case 9:
                          gce = _b.sent();
                          if (!gce) return [3 /*break*/, 11];
                          // For GCE, just return a default ComputeClient. It will take care of
                          // the rest.
                          this.cachedCredential = new computeclient_1.Compute(options);
                          return [4 /*yield*/, this.getDefaultProjectId()];
                      case 10:
                          projectId = _b.sent();
                          return [2 /*return*/, { projectId: projectId, credential: this.cachedCredential }];
                      case 11: 
                      // We failed to find the default credentials. Bail out with an error.
                      throw new Error('Could not load the default credentials. Browse to https://developers.google.com/accounts/docs/application-default-credentials for more information.');
                      case 12: return [3 /*break*/, 14];
                      case 13:
                          e_2 = _b.sent();
                          throw new Error('Unexpected error while acquiring application default credentials: ' +
                              e_2.message);
                      case 14: return [2 /*return*/];
                  }
              });
          });
      };
      /**
       * Determines whether the auth layer is running on Google Compute Engine.
       * @returns A promise that resolves with the boolean.
       * @api private
       */
      GoogleAuth.prototype._checkIsGCE = function () {
          return __awaiter(this, void 0, void 0, function () {
              var _a;
              return __generator(this, function (_b) {
                  switch (_b.label) {
                      case 0:
                          if (!(this.checkIsGCE === undefined)) return [3 /*break*/, 2];
                          _a = this;
                          return [4 /*yield*/, gcpMetadata.isAvailable()];
                      case 1:
                          _a.checkIsGCE = _b.sent();
                          _b.label = 2;
                      case 2: return [2 /*return*/, this.checkIsGCE];
                  }
              });
          });
      };
      /**
       * Attempts to load default credentials from the environment variable path..
       * @returns Promise that resolves with the OAuth2Client or null.
       * @api private
       */
      GoogleAuth.prototype._tryGetApplicationCredentialsFromEnvironmentVariable = function (options) {
          return __awaiter(this, void 0, void 0, function () {
              var credentialsPath;
              return __generator(this, function (_a) {
                  credentialsPath = process.env['GOOGLE_APPLICATION_CREDENTIALS'];
                  if (!credentialsPath || credentialsPath.length === 0) {
                      return [2 /*return*/, null];
                  }
                  try {
                      return [2 /*return*/, this._getApplicationCredentialsFromFilePath(credentialsPath, options)];
                  }
                  catch (e) {
                      throw this.createError('Unable to read the credential file specified by the GOOGLE_APPLICATION_CREDENTIALS environment variable.', e);
                  }
                  return [2 /*return*/];
              });
          });
      };
      /**
       * Attempts to load default credentials from a well-known file location
       * @return Promise that resolves with the OAuth2Client or null.
       * @api private
       */
      GoogleAuth.prototype._tryGetApplicationCredentialsFromWellKnownFile = function (options) {
          return __awaiter(this, void 0, void 0, function () {
              var location, home;
              return __generator(this, function (_a) {
                  location = null;
                  if (this._isWindows()) {
                      // Windows
                      location = process.env['APPDATA'];
                  }
                  else {
                      home = process.env['HOME'];
                      if (home) {
                          location = this._pathJoin(home, '.config');
                      }
                  }
                  // If we found the root path, expand it.
                  if (location) {
                      location = this._pathJoin(location, 'gcloud');
                      location =
                          this._pathJoin(location, 'application_default_credentials.json');
                      location = this._mockWellKnownFilePath(location);
                      // Check whether the file exists.
                      if (!this._fileExists(location)) {
                          location = null;
                      }
                  }
                  // The file does not exist.
                  if (!location) {
                      return [2 /*return*/, null];
                  }
                  // The file seems to exist. Try to use it.
                  return [2 /*return*/, this._getApplicationCredentialsFromFilePath(location, options)];
              });
          });
      };
      /**
       * Attempts to load default credentials from a file at the given path..
       * @param filePath The path to the file to read.
       * @returns Promise that resolves with the OAuth2Client
       * @api private
       */
      GoogleAuth.prototype._getApplicationCredentialsFromFilePath = function (filePath, options) {
          if (options === void 0) { options = {}; }
          return __awaiter(this, void 0, void 0, function () {
              var readStream;
              return __generator(this, function (_a) {
                  // Make sure the path looks like a string.
                  if (!filePath || filePath.length === 0) {
                      throw new Error('The file path is invalid.');
                  }
                  // Make sure there is a file at the path. lstatSync will throw if there is
                  // nothing there.
                  try {
                      // Resolve path to actual file in case of symlink. Expect a thrown error
                      // if not resolvable.
                      filePath = fs_1.default.realpathSync(filePath);
                      if (!fs_1.default.lstatSync(filePath).isFile()) {
                          throw new Error();
                      }
                  }
                  catch (err) {
                      throw this.createError(util_1.default.format('The file at %s does not exist, or it is not a file.', filePath), err);
                  }
                  // Now open a read stream on the file, and parse it.
                  try {
                      readStream = this._createReadStream(filePath);
                      return [2 /*return*/, this.fromStream(readStream, options)];
                  }
                  catch (err) {
                      throw this.createError(util_1.default.format('Unable to read the file at %s.', filePath), err);
                  }
                  return [2 /*return*/];
              });
          });
      };
      /**
       * Create a credentials instance using the given input options.
       * @param json The input object.
       * @returns JWT or UserRefresh Client with data
       */
      GoogleAuth.prototype.fromJSON = function (json, options) {
          var client;
          if (!json) {
              throw new Error('Must pass in a JSON object containing the Google auth settings.');
          }
          this.jsonContent = json;
          options = options || {};
          if (json.type === 'authorized_user') {
              client = new refreshclient_1.UserRefreshClient(options);
          }
          else {
              options.scopes = this.scopes;
              client = new jwtclient_1.JWT(options);
          }
          client.fromJSON(json);
          return client;
      };
      GoogleAuth.prototype.fromStream = function (inputStream, optionsOrCallback, callback) {
          if (optionsOrCallback === void 0) { optionsOrCallback = {}; }
          var options = {};
          if (typeof optionsOrCallback === 'function') {
              callback = optionsOrCallback;
          }
          else {
              options = optionsOrCallback;
          }
          if (callback) {
              this.fromStreamAsync(inputStream, options)
                  .then(function (r) { return callback(null, r); })
                  .catch(callback);
          }
          else {
              return this.fromStreamAsync(inputStream, options);
          }
      };
      GoogleAuth.prototype.fromStreamAsync = function (inputStream, options) {
          var _this = this;
          return new Promise(function (resolve, reject) {
              if (!inputStream) {
                  throw new Error('Must pass in a stream containing the Google auth settings.');
              }
              var s = '';
              inputStream.setEncoding('utf8');
              inputStream.on('data', function (chunk) {
                  s += chunk;
              });
              inputStream.on('end', function () {
                  try {
                      var data = JSON.parse(s);
                      var r = _this.fromJSON(data, options);
                      return resolve(r);
                  }
                  catch (err) {
                      return reject(err);
                  }
              });
          });
      };
      /**
       * Create a credentials instance using the given API key string.
       * @param apiKey The API key string
       * @param options An optional options object.
       * @returns A JWT loaded from the key
       */
      GoogleAuth.prototype.fromAPIKey = function (apiKey, options) {
          options = options || {};
          var client = new jwtclient_1.JWT(options);
          client.fromAPIKey(apiKey);
          return client;
      };
      /**
       * Determines whether the current operating system is Windows.
       * @api private
       */
      GoogleAuth.prototype._isWindows = function () {
          var sys = this._osPlatform();
          if (sys && sys.length >= 3) {
              if (sys.substring(0, 3).toLowerCase() === 'win') {
                  return true;
              }
          }
          return false;
      };
      /**
       * Creates a file stream. Allows mocking.
       * @api private
       */
      GoogleAuth.prototype._createReadStream = function (filePath) {
          return fs_1.default.createReadStream(filePath);
      };
      /**
       * Gets the current operating system platform. Allows mocking.
       * @api private
       */
      GoogleAuth.prototype._osPlatform = function () {
          return os_1.default.platform();
      };
      /**
       * Determines whether a file exists. Allows mocking.
       * @api private
       */
      GoogleAuth.prototype._fileExists = function (filePath) {
          return fs_1.default.existsSync(filePath);
      };
      /**
       * Joins two parts of a path. Allows mocking.
       * @api private
       */
      GoogleAuth.prototype._pathJoin = function (item1, item2) {
          return path_1.default.join(item1, item2);
      };
      /**
       * Allows mocking of the path to a well-known file.
       * @api private
       */
      GoogleAuth.prototype._mockWellKnownFilePath = function (filePath) {
          return filePath;
      };
      // Creates an Error containing the given message, and includes the message
      // from the optional err passed in.
      GoogleAuth.prototype.createError = function (message, err) {
          var s = message || '';
          if (err) {
              var errorMessage = String(err);
              if (errorMessage && errorMessage.length > 0) {
                  if (s.length > 0) {
                      s += ' ';
                  }
                  s += errorMessage;
              }
          }
          return Error(s);
      };
      /**
       * Run the Google Cloud SDK command that prints the default project ID
       */
      GoogleAuth.prototype.getDefaultServiceProjectId = function () {
          return __awaiter(this, void 0, void 0, function () {
              return __generator(this, function (_a) {
                  return [2 /*return*/, new Promise(function (resolve) {
                          child_process_1.exec('gcloud config config-helper --format json', function (err, stdout, stderr) {
                              if (!err && stdout) {
                                  try {
                                      var projectId = JSON.parse(stdout).configuration.properties.core.project;
                                      resolve(projectId);
                                      return;
                                  }
                                  catch (e) {
                                      // ignore errors
                                  }
                              }
                              resolve(null);
                          });
                      })];
              });
          });
      };
      /**
       * Loads the project id from environment variables.
       * @api private
       */
      GoogleAuth.prototype.getProductionProjectId = function () {
          return process.env['GCLOUD_PROJECT'] || process.env['GOOGLE_CLOUD_PROJECT'];
      };
      /**
       * Loads the project id from the GOOGLE_APPLICATION_CREDENTIALS json file.
       * @api private
       */
      GoogleAuth.prototype.getFileProjectId = function () {
          return __awaiter(this, void 0, void 0, function () {
              var r;
              return __generator(this, function (_a) {
                  switch (_a.label) {
                      case 0:
                          if (this.cachedCredential) {
                              // Try to read the project ID from the cached credentials file
                              return [2 /*return*/, this.cachedCredential.projectId];
                          }
                          return [4 /*yield*/, this._tryGetApplicationCredentialsFromEnvironmentVariable()];
                      case 1:
                          r = _a.sent();
                          if (r) {
                              return [2 /*return*/, r.projectId];
                          }
                          else {
                              return [2 /*return*/, null];
                          }
                          return [2 /*return*/];
                  }
              });
          });
      };
      /**
       * Gets the Compute Engine project ID if it can be inferred.
       */
      GoogleAuth.prototype.getGCEProjectId = function () {
          return __awaiter(this, void 0, void 0, function () {
              var r, e_3;
              return __generator(this, function (_a) {
                  switch (_a.label) {
                      case 0:
                          _a.trys.push([0, 2, , 3]);
                          return [4 /*yield*/, gcpMetadata.project('project-id')];
                      case 1:
                          r = _a.sent();
                          return [2 /*return*/, r.data];
                      case 2:
                          e_3 = _a.sent();
                          // Ignore any errors
                          return [2 /*return*/, null];
                      case 3: return [2 /*return*/];
                  }
              });
          });
      };
      GoogleAuth.prototype.getCredentials = function (callback) {
          if (callback) {
              this.getCredentialsAsync().then(function (r) { return callback(null, r); }).catch(callback);
          }
          else {
              return this.getCredentialsAsync();
          }
      };
      GoogleAuth.prototype.getCredentialsAsync = function () {
          return __awaiter(this, void 0, void 0, function () {
              var credential, isGCE, data;
              return __generator(this, function (_a) {
                  switch (_a.label) {
                      case 0:
                          if (this.jsonContent) {
                              credential = {
                                  client_email: this.jsonContent.client_email,
                                  private_key: this.jsonContent.private_key
                              };
                              return [2 /*return*/, credential];
                          }
                          return [4 /*yield*/, this._checkIsGCE()];
                      case 1:
                          isGCE = _a.sent();
                          if (!isGCE) {
                              throw new Error('Unknown error.');
                          }
                          return [4 /*yield*/, gcpMetadata.instance({ property: 'service-accounts/', params: { recursive: true } })];
                      case 2:
                          data = (_a.sent()).data;
                          if (!data || !data.default || !data.default.email) {
                              throw new Error('Failure from metadata server.');
                          }
                          return [2 /*return*/, { client_email: data.default.email }];
                  }
              });
          });
      };
      /**
       * Automatically obtain a client based on the provided configuration.  If no
       * options were passed, use Application Default Credentials.
       */
      GoogleAuth.prototype.getClient = function (options) {
          return __awaiter(this, void 0, void 0, function () {
              var _a, filePath, stream_1, _b;
              return __generator(this, function (_c) {
                  switch (_c.label) {
                      case 0:
                          if (options) {
                              this.keyFilename =
                                  options.keyFilename || options.keyFile || this.keyFilename;
                              this.scopes = options.scopes || this.scopes;
                              this.jsonContent = options.credentials || this.jsonContent;
                          }
                          if (!!this.cachedCredential) return [3 /*break*/, 6];
                          if (!this.jsonContent) return [3 /*break*/, 2];
                          _a = this;
                          return [4 /*yield*/, this.fromJSON(this.jsonContent)];
                      case 1:
                          _a.cachedCredential = _c.sent();
                          return [3 /*break*/, 6];
                      case 2:
                          if (!this.keyFilename) return [3 /*break*/, 4];
                          filePath = path_1.default.resolve(this.keyFilename);
                          stream_1 = fs_1.default.createReadStream(filePath);
                          _b = this;
                          return [4 /*yield*/, this.fromStreamAsync(stream_1)];
                      case 3:
                          _b.cachedCredential = _c.sent();
                          return [3 /*break*/, 6];
                      case 4: return [4 /*yield*/, this.getApplicationDefaultAsync()];
                      case 5:
                          _c.sent();
                          _c.label = 6;
                      case 6: return [2 /*return*/, this.cachedCredential];
                  }
              });
          });
      };
      /**
       * Automatically obtain application default credentials, and return
       * an access token for making requests.
       */
      GoogleAuth.prototype.getAccessToken = function () {
          return __awaiter(this, void 0, void 0, function () {
              var client;
              return __generator(this, function (_a) {
                  switch (_a.label) {
                      case 0: return [4 /*yield*/, this.getClient()];
                      case 1:
                          client = _a.sent();
                          return [4 /*yield*/, client.getAccessToken()];
                      case 2: return [2 /*return*/, (_a.sent()).token];
                  }
              });
          });
      };
      /**
       * Obtain the HTTP headers that will provide authorization for a given
       * request.
       */
      GoogleAuth.prototype.getRequestHeaders = function (url) {
          return __awaiter(this, void 0, void 0, function () {
              var client;
              return __generator(this, function (_a) {
                  switch (_a.label) {
                      case 0: return [4 /*yield*/, this.getClient()];
                      case 1:
                          client = _a.sent();
                          return [4 /*yield*/, client.getRequestMetadata(url)];
                      case 2: return [2 /*return*/, (_a.sent()).headers];
                  }
              });
          });
      };
      /**
       * Obtain credentials for a request, then attach the appropriate headers to
       * the request options.
       * @param opts Axios or Request options on which to attach the headers
       */
      GoogleAuth.prototype.authorizeRequest = function (opts) {
          return __awaiter(this, void 0, void 0, function () {
              var url, client, headers;
              return __generator(this, function (_a) {
                  switch (_a.label) {
                      case 0:
                          opts = opts || {};
                          url = opts.url || opts.uri;
                          return [4 /*yield*/, this.getClient()];
                      case 1:
                          client = _a.sent();
                          return [4 /*yield*/, client.getRequestMetadata(url)];
                      case 2:
                          headers = (_a.sent()).headers;
                          opts.headers = Object.assign(opts.headers || {}, headers);
                          return [2 /*return*/, opts];
                  }
              });
          });
      };
      /**
       * Automatically obtain application default credentials, and make an
       * HTTP request using the given options.
       * @param opts Axios request options for the HTTP request.
       */
      // tslint:disable-next-line no-any
      GoogleAuth.prototype.request = function (opts) {
          return __awaiter(this, void 0, void 0, function () {
              var client;
              return __generator(this, function (_a) {
                  switch (_a.label) {
                      case 0: return [4 /*yield*/, this.getClient()];
                      case 1:
                          client = _a.sent();
                          return [2 /*return*/, client.request(opts)];
                  }
              });
          });
      };
      /**
       * Determine the compute environment in which the code is running.
       */
      GoogleAuth.prototype.getEnv = function () {
          return envDetect_1.getEnv();
      };
      /**
       * Sign the given data with the current private key, or go out
       * to the IAM API to sign it.
       * @param data The data to be signed.
       */
      GoogleAuth.prototype.sign = function (data) {
          return __awaiter(this, void 0, void 0, function () {
              var client, sign, projectId, creds, id, res;
              return __generator(this, function (_a) {
                  switch (_a.label) {
                      case 0: return [4 /*yield*/, this.getClient()];
                      case 1:
                          client = _a.sent();
                          if (client instanceof jwtclient_1.JWT && client.key) {
                              sign = crypto_1.default.createSign('RSA-SHA256');
                              sign.update(data);
                              return [2 /*return*/, sign.sign(client.key, 'base64')];
                          }
                          return [4 /*yield*/, this.getProjectId()];
                      case 2:
                          projectId = _a.sent();
                          if (!projectId) {
                              throw new Error('Cannot sign data without a project ID.');
                          }
                          return [4 /*yield*/, this.getCredentials()];
                      case 3:
                          creds = _a.sent();
                          if (!creds.client_email) {
                              throw new Error('Cannot sign data without `client_email`.');
                          }
                          id = "projects/" + projectId + "/serviceAccounts/" + creds.client_email;
                          return [4 /*yield*/, this.request({
                                  method: 'POST',
                                  url: "https://iam.googleapis.com/v1/" + id + ":signBlob",
                                  data: { bytesToSign: Buffer.from(data).toString('base64') }
                              })];
                      case 4:
                          res = _a.sent();
                          return [2 /*return*/, res.data.signature];
                  }
              });
          });
      };
      /**
       * Export DefaultTransporter as a static property of the class.
       */
      GoogleAuth.DefaultTransporter = transporters_1.DefaultTransporter;
      return GoogleAuth;
  }());
  exports.GoogleAuth = GoogleAuth;
  //# sourceMappingURL=googleauth.js.map