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OpenYOLO for Web

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OpenYOLO for Web - Automatic credential management for modern browsers

OpenYOLO for Web is an OpenID Foundation project to provide in-context credential exchange and management. By using this API, a requesting page can directly retrieve existing credentials in the user's preferred credential manager.

OpenYOLO for Web is currently experimental and not production ready; the specification, defined API and reference implementation are all rapidly changing. An announcement will be made on the Account Chooser and OpenYOLO working group mailing list when this changes.

Feel free to experiment with the API, but we do not recommend using it in its current form unless you are being explicitly supported in doing so by an implementor of OpenYOLO for Web.

Supported Browsers

OpenYOLO for Web is intended to work on the following browser and platform combinations:

Browser Android iOS Mac OS Linux Windows 10
Chrome
Firefox
Safari
Edge

The client library is not guaranteed to work on any other browser or platform; we will only respond to issues outwith these supported combinations if loading the library prevents a client page from operating normally.

As OpenYOLO is security sensitive, it is imperative that browsers are frequently updated in order to ensure security vulnerabilities that may affect the API are patched in a timely manner. OpenYOLO credential providers may, at their discretion, refuse to operate on a browser that is more than two versions older than the current stable release of the above supported browsers. The impact of this on sites that use the API on older browsers is that all credential requests will behave as though the user has no credential provider - a soft failure that should otherwise not affect the functioning of the client page.

Using the OpenYOLO API / SPI

The OpenYOLO API is currently available through npm, so can be added as a dependency to your own npm based project:

npm install @openid/openyolo --save

Or, when using yarn:

yarn add @openid/openyolo

When this dependency is added, the API is available as the default module through import / require:

// ES6 import:
import openyolo from '@openid/openyolo';

// ES5 CommonJS require
const openyolo = require('@openid/openyolo');

Once the API matures, we will provide a CDN-backed version of OpenYOLO for inclusion in pages through a <script> tag.

The Service Provider Interface (SPI) for credential providers is also available from the npm package, using a more explicit module path:

// ES6 import:
import openyolo_spi from '@openid/openyolo/es6/openyolo-spi';

// ES5 CommonJS require
const openyolo_spi = require('@openid/openyolo/es5/openyolo-spi');

Retrieving an existing credential

All API methods are asynchronous and promise-based. To retrieve an existing credential that is either an email and password credential (referenced by the authentication method URI openyolo://id-and-password) or a Google Sign-in credential (https://accounts.google.com), do:

let credentialPromise = openyolo.retrieve({
  supportedAuthMethods: [
    'openyolo://id-and-password',
    'https://accounts.google.com'
  ]
}).then((credential) => {
  if (credential) {
    // user selected credential, use it to sign in
    return signInWith(credential);
  } else {
    // no credential selected, so do the manual authentication flow
    return doManualSignIn();
  }
}, (err) => {
  // request failed, likely unrecoverable
})

This could of course be reformulated as ES2017 async/await:

try {
  let credential = openyolo.retrieve({
    supportedAuthMethods: [
      'openyolo://id-and-password',
      'https://accounts.google.com'
    ]
  });
  if (credential) {
    return signInWith(credential);
  } else {
    return doManualSignIn();
  }
} catch (err) {
  // request failed, likely unrecoverable
}

Retrieving a login hint

If there is no existing saved credential, a request can be made for a "login hint" that can be used to discover an existing account, or create a new one. To retrieve a login hintthat is either an email and password credential or Facebook Sign-in, do:

let hintPromise = openyolo.hint({
  supportedAuthMethods: [
    'openyolo://id-and-password',
    'https://www.facebook.com'
  ]
});

Optionally, a password specification can be provided to notify the credential provider the format of passwords that are supported, to aid correct password generation. For instance, to specify that a password must be between 8 and 24 characters, and must contain at least one number and one symbol:

let hintPromise = openyolo.hint({
  supportedAuthMethods: [/*...*/],
  passwordSpec: {
    minLength: 8,
    maxLength: 24,
    allowedChars: 'abcdef...',
    requiredCharSets: [
      { count: 1, chars: '0123456789' },
      { count: 1, chars: '!@#$%^&*()_-=+' },
    ],
  }
});

If no password specification is provided, a broadly compatible default is used.

Saving a credential

let savePromise = openyolo.save({
  id: '[email protected]',
  authMethod: 'openyolo://id-and-password',
  displayName: 'Jane Doe',
  password: 'correctH0rseBatteryStapl3',
  profilePicture: 'https://robohash.org/694ea0904ceaf766c6738166ed89bafb'
});

Contributor setup instructions

We use yarn as a package manager, and all our scripts are currently configured with this assumption (in the future, we plan to generify this to support the npm cli too).

  1. Clone the repository: git clone [email protected]:openid/OpenYOLO-Web.git openyolo_web
  2. Install the package: yarn install / npm install.
  3. Compile the development version of the code and demos: yarn run compile.

Editor setup

We recommend that you use Visual Studio Code when editing TypeScript files within this project. If you do so, please also install the following plugins:

If the root folder of the repository is opened in VSCode, your editor will be automatically configured to match the formatting and lint settings used by the core maintainers.

Other editors are fine; EditorConfig plugins are available for many other editors that will ensure basic consistency with the core maintainers. Lint problems can be detected (and often automatically fixed) by running yarn run lint-all-fix.

Common operations:

All of the common operations are defined as scripts within package.json and can be run by executing yarn run $TASK, where $TASK is one of the following:

Task Description
compile Build all development sources
test Run all tests, in Chrome
test -- --browsers Firefox Run all tests, in Firefox
test -- --browsers safari Run all tests, in Safari
check Lint code and run all tests
demo-provider-barbican Run the demo credential provider
demo-client-apitester Run the API testing client

Testing on Sauce Labs

In order to get better test coverage of different browser environments, it is possible to run all tests using Sauce Labs. This requires a Sauce Labs account, which is not free. Tests will be run on Sauce Labs automatically when a pull request is created, but to run locally you will need your own account.

To run the tests, ensure that you set the SAUCE_USERNAME and SAUCE_ACCESS_KEY environment variables to the appropriate values for your Sauce Labs account, and then run: yarn run test -- --use-sauce.

Precommit checks

Precommit checks are automatically applied on running git commit, that ensure code is correctly formatted, styled, and that all tests pass. We require these checks to pass before we will review or accept pull requests.

If you wish to run these checks before a commit, then run yarn run check.

If you wish to skip these checks for local temporary commits during development, you can pass the --no-verify flag to git.

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  • JavaScript 5.8%