oauth2-server-grant-type-apple/dist/oauth2-server-grant-type-apple.modern.mjs

Apple grant type for oauth2-server

import { AbstractGrantType, InvalidArgumentError, InvalidRequestError, InvalidTokenError } from 'oauth2-server';
import jwt from 'jsonwebtoken';
import jwksRsaClient from 'jwks-rsa';

function _extends() {
  _extends = Object.assign ? Object.assign.bind() : function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };
  return _extends.apply(this, arguments);
}

function _objectWithoutPropertiesLoose(source, excluded) {
  if (source == null) return {};
  var target = {};
  var sourceKeys = Object.keys(source);
  var key, i;

  for (i = 0; i < sourceKeys.length; i++) {
    key = sourceKeys[i];
    if (excluded.indexOf(key) >= 0) continue;
    target[key] = source[key];
  }

  return target;
}

const _excluded = ["token", "audience"];
const jwksClient = jwksRsaClient({
  cache: true,
  jwksUri: 'https://appleid.apple.com/auth/keys'
});

const getKey = (header, callback) => {
  jwksClient.getSigningKey(header.kid).then(key => {
    const signingKey = key.getPublicKey();
    callback(null, signingKey);
  }).catch(err => {
    callback(err);
  });
};

const ISSUER = 'https://appleid.apple.com'; // jwt only supports callback now
// https://github.com/auth0/node-jsonwebtoken/issues/111

const verifyToken = _ref => {
  let {
    token,
    audience
  } = _ref,
      rest = _objectWithoutPropertiesLoose(_ref, _excluded);

  return new Promise((resolve, reject) => {
    jwt.verify(token, getKey, _extends({
      algorithms: ['RS256'],
      issuer: ISSUER,
      audience
    }, rest), (err, data) => {
      if (err) {
        return reject(err);
      }

      resolve(data);
    });
  });
};

class AppleGrantType extends AbstractGrantType {
  constructor(options) {
    var _this$model$appleGran;

    super(options);
    this.model = void 0;
    this.appIds = void 0;
    this.model = options.model;

    if (!options.model) {
      throw new InvalidArgumentError('Missing parameter: `model`');
    }

    if (!options.model.getUserWithApple) {
      throw new InvalidArgumentError('Invalid argument: model does not implement `getUserWithApple()`');
    }

    const appId = (_this$model$appleGran = this.model.appleGrantType) == null ? void 0 : _this$model$appleGran.appId;
    this.appIds = appId ? Array.isArray(appId) ? appId : Array(appId) : [];

    if (!this.appIds.length) {
      throw new InvalidArgumentError('Invalid argument: Apple valid appId must be provided in grant type options');
    }

    if (!options.model.saveToken) {
      throw new InvalidArgumentError('Invalid argument: model does not implement `saveToken()`');
    }

    this.handle = this.handle.bind(this);
    this.getUser = this.getUser.bind(this);
    this.saveToken = this.saveToken.bind(this);
  }

  async handle(request, client) {
    if (!request) {
      throw new InvalidArgumentError('Missing parameter: `request`');
    }

    if (!client) {
      throw new InvalidArgumentError('Missing parameter: `client`');
    }

    const scope = this.getScope(request);
    const user = await this.getUser(request);
    return await this.saveToken(user, client, scope);
  }

  async getUser(request) {
    const token = request.body.apple_token;
    const name = request.body.name;

    if (!token) {
      throw new InvalidRequestError('Missing parameter: `apple_token`');
    }

    let data;

    try {
      data = await verifyToken({
        token,
        audience: this.appIds
      });
    } catch (err) {
      console.error(err);
      throw new InvalidTokenError('Apple token is invalid or expired');
    }

    return await this.model.getUserWithApple(_extends({
      name
    }, data));
  }

  async saveToken(user, client, scope) {
    const scopeData = await this.validateScope(user, client, scope);
    const accessToken = await this.generateAccessToken(client, user, scope);
    const refreshToken = await this.generateRefreshToken(client, user, scope);
    const accessTokenExpiresAt = this.getAccessTokenExpiresAt();
    const refreshTokenExpiresAt = await this.getRefreshTokenExpiresAt();
    const token = {
      accessToken,
      accessTokenExpiresAt,
      refreshToken,
      refreshTokenExpiresAt,
      scope: scopeData || [],
      user,
      client
    };
    return await this.model.saveToken(token, client, user);
  }

}

export { AppleGrantType as default };
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