sdk-token-core-node-js

Generate and validate tokens.

This library integrates into the resource or authorization server back-end JavaScript using NodeJS.

Use this library for all token types: 'access', 'client', 'grant', and 'refresh'.

Usage

To integrate this library with a resource or authorization server you will need two imports. One is for this library, the other one is for a data driver that manages the persistent data storage for this library. In this example, we use an in-memory storage driver:

const { WebauthzTokenMemoryDatabase } = require('@webauthz/sdk-token-data-memory-js');
const { WebauthzToken } = require('@webauthz/sdk-token-core-node-js');

Then, create an instance of the Webauthz class and configure it:

// webauthz token manager with in-memory database
const webauthzToken = new WebauthzToken({
    database: new WebauthzTokenMemoryDatabase(),
});

Generate access tokens:

const access_token = await webauthzToken.generateToken({
    type: 'access',
    client_id,
    realm,
    scope,
    path,
    not_after,
    user_id
});

Generate client tokens:

const client_token = await webauthzToken.generateToken({
    type: 'client',
    client_id,
    realm: 'Webauthz',
    scope: 'webauthz:client',
    path: '/api/webauthz',
});

Generate grant tokens:

const grant_token = await webauthzPlugin.generateToken({
    type: 'grant',
    client_id,
    request_id
});

Generate refresh tokens:

const refresh_token = await webauthzPlugin.generateToken({
    type: 'refresh',
    client_id,
    request_id
});

The next place to integrate the library is wherever you initialize middleware such as WebauthzExpress. The middleware uses the checkToken method of this library to validate incoming bearer tokens:

const authorizationHeader = req.header('Authorization');
const tokenInput = authorizationHeader.substr('bearer '.length).trim();
const tokenInfo = await webauthzToken.checkToken(tokenInput);

API

An application will need to use the following functions:

• generateToken
• checkToken

generateToken

Example usage:

const access_token = await webauthzToken.generateToken({
    type: 'access',
    client_id,
    realm,
    scope,
    path,
    not_after,
    user_id
});

Generate a random token, compute the hash of the token, and store the hash associated to the specified token info.

Parameters:

• param0 (object, required) is an object with the properties type, client_id, and other type-specific properties.

Properties of param0:

• type (string, required) the token type; one of 'access', 'client', 'grant', or 'refresh'
• client_id (string, required) the unique id of the client for which the token is generated

Return value: the token value to return to the client

checkToken

Example usage:

const tokenInfo = await webauthzPlugin.checkToken(bearerToken);

Validate a token.

Parameters:

• param0 (string, required) the bearer token value

Return value: If successful, returns the validated token info. Otherwise, throws an exception.

Storage

The library uses an abstract database object to store and lookup information in pesistent storage. The application must provide an object that implements the storage interface documented here.

See also sdk-token-data-memory-js for an example in-memory implementation that is useful for testing.

createToken

Example usage:

const isCreated = await database.createToken(id, record);

Create new record, or replace existing record. Should not throw exception unless there is a write error.

The record object is stored using the id as the primary key.

Parameters:

• param0 (string, required) the value of id
• param1 (object, required) is an object with the token info to store

Returns a boolean indicating whether the write operation was successful.

fetchToken

Example usage:

const record = await database.fetchToken(id);

Fetch an existing token record from storage.

Parameters:

• param0 (string, required) the value of id

Return the token record object, or null if it is not found.

Build

npm run lint
npm run build