Keycloak VS IdentityServer

In this article we'll be using Keycloak to secure a Vue.js Web application. We're going to leverage oidc-client-ts to integrate OIDC authentication with the Vue app. The oidc-client-ts package is a well-maintained and used library. It provides a lot of utilities for building out a fully production app.

Keycloak has been a leader in the Identity and Access Management world since its launch almost 8 years ago. It is an open-source offering under the stewardship of Red Hat

It sounds like what you're looking for is an identity provider.

A popular open source option is https://www.keycloak.org/

This application can manage your users, then you can use standards like OpenID or SAML to plug it into your application, of which there are usually many plugins to accomplish this depending on your tech stack.

KeyCloak is a Cloud Native Computing Foundation (CNCF) project that offers enterprise IAM solutions. Keycloak emphasizes proficient enterprise authorization solutions by providing:

Outline only uses SSO for authentication. The solution when self hosting is use a private keycloak server [1]. This allows you to do email based auth.

[1] https://www.keycloak.org/

> Keycloak was good but has too much legacy for 10+ years.

I got curious, actually seems to check out and explains why it's so well documented (but also complex and oftentimes confusing):

> The first production release of Keycloak was in September 2014, with development having started about a year earlier.

https://en.wikipedia.org/wiki/Keycloak

https://github.com/keycloak/keycloak/releases/tag/1.0.0.Fina...

> Don't outsource either your authentication or authorization. Run it in-house.

This is hard to do, though. I hope people here will drop a lot of combinations that work for them!

Personally, for a small/medium scale project, I went with:

Keycloak: https://www.keycloak.org/

It supports various backing RDBMSes (like PostgreSQL, MariaDB/MySQL and others), allows both users that you persist in your own DB, as well as various external sources, like social login across various platforms, is an absolute pain to configure and sometimes acts in stupid ways behind a reverse proxy, but has most of the features that you might ever want, which sadly comes coupled with some complexity and an enterprise feeling.

I quite like that it offers the login/registration views that you need with redirects, as well as user management, storing roles/permissions and other custom attributes. It's on par with what you'd expect and should serve you nicely.

mod_auth_openidc: https://github.com/OpenIDC/mod_auth_openidc

This one's a certified OpenID Connect Relying Party implementation for... Apache2/httpd.

Some might worry about the performance and there are other options out there (like a module for OpenResty, which is built on top of Nginx), but when coupled with mod_md Apache makes for a great reverse proxy/ingress for my personal needs.

The benefit here is that I don't need 10 different implementations for each service/back end language that's used, I can outsource the heavy lifting to mod_auth_openidc (protected paths, needed roles/permissions, redirect URLs, token renewal and other things) and just read a few trusted headers behind the reverse proxy if further checks are needed, which is easy in all technologies.

That said, the configuration there is also hard and annoying to do, as is working with OpenID Connect in general, even though you can kind of understand why that complexity is inherent. Here's a link with some certified implementations, by the way: https://openid.net/developers/certified-openid-connect-imple...

You couldn't pay me to use their bullshit...if you need an identity server/provider go with Keycloak. Open source, free, and standards based, works better and scales better too.

#docker-compose.yml version: '3' volumes: postgres_data: driver: local services: postgres: container_name: postgres image: postgres:15-alpine restart: unless-stopped volumes: - postgres_data:/var/lib/postgresql/data - ./init/db:/docker-entrypoint-initdb.d/ command: postgres -c wal_level=logical ports: - '5433:5432' environment: POSTGRES_DB: ${POSTGRES_DB} POSTGRES_USER: ${POSTGRES_USER} POSTGRES_PASSWORD: ${POSTGRES_PASSWORD} hasura: container_name: hasura image: hasura/graphql-engine:v2.29.0 restart: unless-stopped depends_on: - postgres # - keycloak ports: - '6080:8080' volumes: - ./hasura/metadata:/hasura-metadata environment: ## postgres database to store Hasura metadata HASURA_GRAPHQL_METADATA_DATABASE_URL: postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/hasura_metadata HASURA_GRAPHQL_DATABASE_URL: postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB} HASURA_GRAPHQL_LOG_LEVEL: warn ## enable the console served by server HASURA_GRAPHQL_ENABLE_CONSOLE: 'true' # set to "false" to disable console ## enable debugging mode. It is recommended to disable this in production HASURA_GRAPHQL_DEV_MODE: 'true' HASURA_GRAPHQL_ENABLED_LOG_TYPES: startup, http-log, webhook-log, websocket-log, query-log ## enable jwt secret when keycloak realm is ready # HASURA_GRAPHQL_JWT_SECRET: '{ "type": "RS256", "jwk_url": "http://keycloak:8080/realms/development/protocol/openid-connect/certs" }' HASURA_GRAPHQL_ADMIN_SECRET: ${HASURA_GRAPHQL_ADMIN_SECRET} HASURA_GRAPHQL_UNAUTHORIZED_ROLE: anonymous HASURA_GRAPHQL_ENABLE_REMOTE_SCHEMA_PERMISSIONS: 'true' HASURA_GRAPHQL_MIGRATIONS_SERVER_TIMEOUT: 30 # To view tables in Postgres # pgweb: # container_name: pgweb # image: sosedoff/pgweb:latest # restart: unless-stopped # ports: # - '8081:8081' # environment: # - DATABASE_URL=postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB}?sslmode=disable # depends_on: # - postgres keycloak: container_name: keycloak image: quay.io/keycloak/keycloak:22.0.5 command: ['start-dev'] # Uncomment following if you want to import realm configuration on start up # command: ['start-dev', '--import-realm'] environment: ## https://www.keycloak.org/server/all-config KEYCLOAK_ADMIN: admin KEYCLOAK_ADMIN_PASSWORD: password123 KC_DB: postgres KC_DB_PASSWORD: postgres_pass KC_DB_USERNAME: postgres KC_DB_SCHEMA: public KC_DB_URL: jdbc:postgresql://postgres:5432/keycloak_db KC_HOSTNAME: localhost ports: - 8090:8080 depends_on: - postgres # Uncomment following if you want to import realm configuration on start up # volumes: # - ./realm-export.json:/opt/keycloak/data/import/realm.json:ro

Its deprecated in favor of Duende Identityserver which introduced a license model.

Tokens usually have a lifetime and they are separate from the user's authentication principals like username and password. Unless you are rolling your own form of token provider (not something that would be recommended) the token creation is handled for you. Take a look at https://identityserver4.readthedocs.io/en/latest/ or if your organization makes under 1M in income a year the free version of what Identity Server progressed into https://duendesoftware.com/products/identityserver

I think Duende (Identity Server) handled the situation pretty well.

https://duendesoftware.com/products/identityserver

> Standard License Pricing

Thanks for your message. No, the idea was not to re-implement OAuth nor OpenID stuff. What I had in mind for the authentication thingy was something like this: https://laravel.com/docs/9.x/sanctum. If we want to go the OAuth/OpenID way, in .NET we have this one: https://github.com/DuendeSoftware/IdentityServer.

> As you said, there are plenty of local options that you only need to run.

I think managed databases are a good analogy here. While I might run my own PostgreSQL/MariaDB instance, many out there won't be overjoyed at the idea of actually needing to run and manage the damned thing, as well as set up some kind of alerting and handling the need to eventually scale it up.

> It also has the largest risk of compromise and data leaking from any service you may use...

PII is definitely a big concern, even if something like password hashes aren't too useful on their own (provided that they're salted), though in cases like that it might actually make a lot of sense to utilize a widely used and tested solution that's specialized for this particular use case.

In many cases, thousands of people across the globe will be able to develop something and squash any bugs in it better than you might be able to do individually or with your own team, though there might be a few exceptions out there. Auth is probably not one of the cases where you want to write code without a lot of eyes on it.

> ...the largest amount of potential lock-in...

This is debatable: standards like OAuth2 and OIDC technically make many of the solutions and libraries way more pluggable and make it easier to choose between various implementations, depending on your needs.

Of course, something like Keycloak also has its own API (as do many of the cloud offerings) so if you build too much automation around a particular implementation, then that advantage partially goes out the window.

> ...and the least need for integration.

I'm not sure about this, it probably depends on your architecture. If you have a monolithic web app, then you probably don't need a separate turnkey/SaaS solution, whereas if you have an ever growing number of services, whilst you want to manage authentication and accounts against all of them centrally, then something like Keycloak (or one of the cloud alternatives) become way more lucrative.

That said, I'd still opt for self-hostable options whenever possible, albeit I also don't trust cloud based password managers and such, preferring something like KeePass instead. I've probably just come to a different conclusion in regards to usability/responsibility/features/security than some other people.

Sadly, there aren't that many good options out there at the moment, apart from Keycloak. For example, IdentityServer is promising, but went in a commercial direction: https://duendesoftware.com/products/identityserver#pricing

He's referring to IdentityServer 3/4, which was open sourced, and was not owned by Microsoft. That 3rd party is commercializing their work (and to be fair, it's a lot of work) as https://duendesoftware.com/products/identityserver , and has a different commercial licensing model.

https://github.com/DuendeSoftware/IdentityServer/blob/main/L... does not seem to square with any definition of "open source" I'm familiar with, and that goes double for having an in-repo file that just says "read this unversioned pdf on some other site"

I would not recommend it. There is a server named Duende identity server which you can host locally.