OAuth 2 / OpenID Connect Client for Web APIs runtime

This is a collection of bits and pieces upon which a more streamlined Client module may be written.

In Scope & Implemented

• Authorization Server Metadata discovery
• OpenID Connect 1.0 and OAuth 2.0 Authorization Code Flow
• PKCE
• Refresh Token Grant
• Device Authorization Grant
• Client Credentials Grant
• Demonstrating Proof-of-Possession at the Application Layer (DPoP)
• Token Introspection
• JWT Token Introspection
• Token Revocation
• JWT Secured Authorization Response Mode (JARM)
• Confidential and Public Client
• JWT-Secured Authorization Request (JAR)
• Pushed Authorization Requests (PAR)
• UserInfo Requests (Bearer and DPoP)
• JWT UserInfo Responses
• Protected Resource Requests (Bearer and DPoP)
• Authorization Server Issuer Identification

Dependencies: 0

Documentation

Examples

example ESM import

import * as oauth2 from '@panva/oauth4webapi'

example Deno import

import * as oauth2 from 'https://deno.land/x/doauth/src/index.ts'

• Authorization Code Flow - OpenID Connect source, or plain OAuth 2.0 source
• Private Key JWT Client Authentication - source | diff from code flow
• DPoP - source | diff from code flow
• Pushed Authorization Request (PAR) - source | diff from code flow
• JWT Authorization Response Mode (JARM) - source | diff from code flow
• Client Credentials Grant - source
• Device Authorization Grant - source

Runtime requirements

The supported javascript runtimes include ones that

• are reasonably up to date ECMAScript (targets ES2020, but may be further transpiled for compatibility)
• support required Web API globals and standard built-in objects
  • Fetch API and its related globals fetch, Response, Headers
  • Web Crypto API and its related globals crypto, CryptoKey
  • Encoding API and its related globals TextEncoder, TextDecoder
  • URL API and its related globals URL, URLSearchParams
  • atob and btoa
  • Uint8Array

Other than browsers the supported runtimes are

• Deno (^1.21.0)
• Cloudflare Workers
• Vercel Edge Functions
• Next.js Middlewares
• Electron (renderer process)

Pending runtime support

• Node.js - once fetch and Web Crypto API are available as globals
• Electron (main process) - once fetch and Web Crypto API are available as globals

Out of scope

• CommonJS
• OAuth 2.0 & OpenID Connect Implicit Flows
• OAuth 2.0 Resource Owner Password Credentials
• OpenID Connect Hybrid Flows
• MTLS (because fetch does not support client certificates)
• JWS HMAC Signed Responses
• JWE Encrypted Messages