dex/README.md

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dex
=====
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dex is a federated identity management service. It provides OpenID Connect (OIDC) to users, and can proxy to multiple remote identity providers (IdP) to drive actual authentication, as well as managing local username/password credentials.
We named the project 'dex' beceause it is a central index of users that other pieces of software can authenticate against.
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## Architecture
dex consists of multiple components:
- **dex-worker** is the primary server component of dex
- host a user-facing API that drives the OIDC protocol
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- proxy to remote identity providers via "connectors"
- provides an API for administrators to manage users.
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- **dex-overlord** is an auxiliary process responsible for two things:
- rotation of keys used by the workers to sign identity tokens
- garbage collection of stale data in the database
- provides an API for bootstrapping the system.
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- **dexctl** is CLI tool used to manage an dex deployment
- configure identity provider connectors
- administer OIDC client identities
- **database**; a database is used to for persistent storage for keys, users,
OAuth sessions and other data. Currently Postgres is the only supported
database.
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A typical dex deployment consists of N dex-workers behind a load balanacer, and one dex-overlord.
The dex-workers directly handle user requests, so the loss of all workers can result in service downtime.
The single dex-overlord runs its tasks periodically, so it does not need to maintain 100% uptime.
## Who Should Use Dex?
**TODO**
## Similar Software
**TODO**
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## Connectors
Remote IdPs could implement any auth-N protocol. *Connectors* contain protocol-specific logic and are used to communicate with remote IdPs. Possible examples of connectors could be: OIDC, LDAP, Local credentials, Basic Auth, etc.
dex ships with an OIDC connector, useful for authenticating with services like Google and Salesforce (or even other dex instances!) and a "local" connector, in which dex itself presents a UI for users to authenticate via dex-stored credentials.
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Future connectors can be developed and added as future interoperability requirements emerge.
## Relevant Specifications
These specs are referenced and implemented to some degree in the `jose` package of this project.
- [JWK](https://tools.ietf.org/html/draft-ietf-jose-json-web-key-36)
- [JWT](https://tools.ietf.org/html/draft-ietf-oauth-json-web-token-30)
- [JWS](https://tools.ietf.org/html/draft-jones-json-web-signature-04)
OpenID Connect (OIDC) is broken up into several specifications. The following (amongst others) are relevant:
- [OpenID Connect Core 1.0](https://openid.net/specs/openid-connect-core-1_0.html)
- [OpenID Connect Discovery 1.0](https://openid.net/specs/openid-connect-discovery-1_0.html)
- [OAuth 2.0 RFC](https://tools.ietf.org/html/rfc6749)
## Example OIDC Discovery Endpoints
- https://accounts.google.com/.well-known/openid-configuration
- https://login.salesforce.com/.well-known/openid-configuration
# Next steps:
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If you want to try out dex quickly with a single process and no database (do *not* run this way in production!) take a look at the [dev guide][dev-guide].
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For running the full stack check out the [getting started guide][getting-started].
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[getting-started]: https://github.com/coreos/dex/blob/master/Documentation/getting-started.md
[dev-guide]: https://github.com/coreos/dex/blob/master/Documentation/dev-guide.md
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# Coming Soon
- Multiple backing Identity Providers
- Identity Management
- Authorization