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This implements the public option for clients which allows using Authelia as an OpenID Connect Provider for cli applications and SPA's where the client secret cannot be considered secure.
549 lines
20 KiB
Markdown
549 lines
20 KiB
Markdown
---
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layout: default
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title: OpenID Connect
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parent: Identity Providers
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grand_parent: Configuration
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nav_order: 2
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---
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# OpenID Connect
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**Authelia** currently supports the [OpenID Connect] OP role as a [**beta**](#roadmap) feature. The OP role is the
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[OpenID Connect] Provider role, not the Relaying Party or RP role. This means other applications that implement the
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[OpenID Connect] RP role can use Authelia as an authentication and authorization backend similar to how you may use
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social media or development platforms for login.
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The Relaying Party role is the role which allows an application to use GitHub, Google, or other [OpenID Connect]
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providers for authentication and authorization. We do not intend to support this functionality at this moment in time.
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## Roadmap
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We have decided to implement [OpenID Connect] as a beta feature, it's suggested you only utilize it for testing and
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providing feedback, and should take caution in relying on it in production as of now. [OpenID Connect] and it's related endpoints
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are not enabled by default unless you specifically configure the [OpenID Connect] section.
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The beta will be broken up into stages. Each stage will bring additional features. The following table is a *rough* plan
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for which stage will have each feature, and may evolve over time:
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<table>
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<thead>
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<tr>
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<th class="tbl-header">Stage</th>
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<th class="tbl-header">Feature Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td rowspan="8" class="tbl-header tbl-beta-stage">beta1 (4.29.0)</td>
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<td><a href="https://openid.net/specs/openid-connect-core-1_0.html#Consent" target="_blank" rel="noopener noreferrer">User Consent</a></td>
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</tr>
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<tr>
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<td><a href="https://openid.net/specs/openid-connect-core-1_0.html#CodeFlowSteps" target="_blank" rel="noopener noreferrer">Authorization Code Flow</a></td>
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</tr>
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<tr>
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<td><a href="https://openid.net/specs/openid-connect-discovery-1_0.html" target="_blank" rel="noopener noreferrer">OpenID Connect Discovery</a></td>
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</tr>
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<tr>
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<td>RS256 Signature Strategy</td>
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</tr>
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<tr>
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<td>Per Client Scope/Grant Type/Response Type Restriction</td>
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</tr>
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<tr>
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<td>Per Client Authorization Policy (1FA/2FA)</td>
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</tr>
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<tr>
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<td class="tbl-beta-stage">Per Client List of Valid Redirection URI's</td>
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</tr>
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<tr>
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<td class="tbl-beta-stage"><a href="https://datatracker.ietf.org/doc/html/rfc6749#section-2.1" target="_blank"rel="noopener noreferrer">Confidential Client Type</a></td>
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</tr>
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<tr>
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<td rowspan="6" class="tbl-header tbl-beta-stage">beta2 (4.30.0) <sup>1</sup></td>
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<td class="tbl-beta-stage"><a href="https://openid.net/specs/openid-connect-core-1_0.html#UserInfo" target="_blank" rel="noopener noreferrer">Userinfo Endpoint</a> (missed in beta1)</td>
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</tr>
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<tr>
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<td class="tbl-beta-stage">Parameter Entropy Configuration</td>
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</tr>
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<tr>
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<td class="tbl-beta-stage">Token/Code Lifespan Configuration</td>
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</tr>
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<tr>
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<td class="tbl-beta-stage">Client Debug Messages</td>
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</tr>
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<tr>
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<td class="tbl-beta-stage">Client Audience</td>
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</tr>
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<tr>
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<td class="tbl-beta-stage"><a href="https://datatracker.ietf.org/doc/html/rfc6749#section-2.1" target="_blank"rel="noopener noreferrer">Public Client Type</a></td>
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</tr>
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<tr>
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<td rowspan="2" class="tbl-header tbl-beta-stage">beta3 <sup>1</sup></td>
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<td>Token Storage</td>
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</tr>
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<tr>
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<td class="tbl-beta-stage">Audit Storage</td>
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</tr>
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<tr>
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<td rowspan="4" class="tbl-header tbl-beta-stage">beta4 <sup>1</sup></td>
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<td><a href="https://openid.net/specs/openid-connect-backchannel-1_0.html" target="_blank" rel="noopener noreferrer">Back-Channel Logout</a></td>
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</tr>
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<tr>
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<td>Deny Refresh on Session Expiration</td>
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</tr>
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<tr>
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<td><a href="https://openid.net/specs/openid-connect-messages-1_0-20.html#rotate.sig.keys" target="_blank" rel="noopener noreferrer">Signing Key Rotation Policy</a></td>
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</tr>
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<tr>
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<td class="tbl-beta-stage">Client Secrets Hashed in Configuration</td>
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</tr>
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<tr>
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<td class="tbl-header tbl-beta-stage">GA <sup>1</sup></td>
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<td class="tbl-beta-stage">General Availability after previous stages are vetted for bug fixes</td>
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</tr>
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<tr>
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<td rowspan="4" class="tbl-header">misc</td>
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<td>List of other features that may be implemented</td>
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</tr>
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<tr>
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<td class="tbl-beta-stage"><a href="https://openid.net/specs/openid-connect-frontchannel-1_0.html" target="_blank" rel="noopener noreferrer">Front-Channel Logout</a> <sup>2</sup></td>
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</tr>
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<tr>
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<td class="tbl-beta-stage"><a href="https://datatracker.ietf.org/doc/html/rfc8414" target="_blank" rel="noopener noreferrer">OAuth 2.0 Authorization Server Metadata</a> <sup>2</sup></td>
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</tr>
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<tr>
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<td class="tbl-beta-stage"><a href="https://openid.net/specs/openid-connect-session-1_0-17.html" target="_blank" rel="noopener noreferrer">OpenID Connect Session Management</a> <sup>2</sup></td>
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</tr>
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</tbody>
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</table>
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¹ _This stage has not been implemented as of yet_.
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² _This individual feature has not been implemented as of yet_.
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## Configuration
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The following snippet provides a sample-configuration for the OIDC identity provider explaining each field in detail.
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```yaml
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identity_providers:
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oidc:
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hmac_secret: this_is_a_secret_abc123abc123abc
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issuer_private_key: |
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--- KEY START
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--- KEY END
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access_token_lifespan: 1h
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authorize_code_lifespan: 1m
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id_token_lifespan: 1h
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refresh_token_lifespan: 90m
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enable_client_debug_messages: false
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clients:
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- id: myapp
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description: My Application
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secret: this_is_a_secret
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public: false
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authorization_policy: two_factor
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audience: []
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scopes:
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- openid
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- groups
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- email
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- profile
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redirect_uris:
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- https://oidc.example.com:8080/oauth2/callback
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grant_types:
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- refresh_token
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- authorization_code
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response_types:
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- code
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response_modes:
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- form_post
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- query
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- fragment
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userinfo_signing_algorithm: none
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```
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## Options
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### hmac_secret
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<div markdown="1">
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type: string
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{: .label .label-config .label-purple }
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required: yes
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{: .label .label-config .label-red }
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</div>
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The HMAC secret used to sign the [OpenID Connect] JWT's. The provided string is hashed to a SHA256
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byte string for the purpose of meeting the required format. You must [generate this option yourself](#generating-a-random-secret).
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Should be defined using a [secret](../secrets.md) which is the recommended for containerized deployments.
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### issuer_private_key
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<div markdown="1">
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type: string
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{: .label .label-config .label-purple }
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required: yes
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{: .label .label-config .label-red }
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</div>
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The private key in DER base64 encoded PEM format used to encrypt the [OpenID Connect] JWT's.[¹](../../faq.md#why-only-use-a-private-issuer-key-and-no-public-key-with-oidc)
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You must [generate this option yourself](#generating-a-random-secret). To create this option, use
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`docker run -u "$(id -u):$(id -g)" -v "$(pwd)":/keys authelia/authelia:latest authelia rsa generate --dir /keys`
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to generate both the private and public key in the current directory. You can then paste the
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private key into your configuration.
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Should be defined using a [secret](../secrets.md) which is the recommended for containerized deployments.
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### access_token_lifespan
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<div markdown="1">
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type: duration
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{: .label .label-config .label-purple }
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default: 1h
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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The maximum lifetime of an access token. It's generally recommended keeping this short similar to the default.
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For more information read these docs about [token lifespan].
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### authorize_code_lifespan
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<div markdown="1">
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type: duration
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{: .label .label-config .label-purple }
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default: 1m
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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The maximum lifetime of an authorize code. This can be rather short, as the authorize code should only be needed to
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obtain the other token types. For more information read these docs about [token lifespan].
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### id_token_lifespan
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<div markdown="1">
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type: duration
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{: .label .label-config .label-purple }
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default: 1h
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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The maximum lifetime of an ID token. For more information read these docs about [token lifespan].
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### refresh_token_lifespan
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<div markdown="1">
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type: string
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{: .label .label-config .label-purple }
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default: 90m
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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The maximum lifetime of a refresh token. The
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refresh token can be used to obtain new refresh tokens as well as access tokens or id tokens with an
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up-to-date expiration. For more information read these docs about [token lifespan].
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A good starting point is 50% more or 30 minutes more (which ever is less) time than the highest lifespan out of the
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[access token lifespan](#access_token_lifespan), the [authorize code lifespan](#authorize_code_lifespan), and the
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[id token lifespan](#id_token_lifespan). For instance the default for all of these is 60 minutes, so the default refresh
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token lifespan is 90 minutes.
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### enable_client_debug_messages
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<div markdown="1">
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type: boolean
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{: .label .label-config .label-purple }
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default: false
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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Allows additional debug messages to be sent to the clients.
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### minimum_parameter_entropy
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<div markdown="1">
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type: integer
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{: .label .label-config .label-purple }
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default: 8
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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This controls the minimum length of the `nonce` and `state` parameters.
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***Security Notice:*** Changing this value is generally discouraged, reducing it from the default can theoretically
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make certain scenarios less secure. It is highly encouraged that if your OpenID Connect RP does not send these parameters
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or sends parameters with a lower length than the default that they implement a change rather than changing this value.
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### clients
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A list of clients to configure. The options for each client are described below.
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#### id
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<div markdown="1">
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type: string
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{: .label .label-config .label-purple }
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required: yes
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{: .label .label-config .label-red }
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</div>
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The Client ID for this client. It must exactly match the Client ID configured in the application
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consuming this client.
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#### description
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<div markdown="1">
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type: string
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{: .label .label-config .label-purple }
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default: *same as id*
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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A friendly description for this client shown in the UI. This defaults to the same as the ID.
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#### secret
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<div markdown="1">
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type: string
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{: .label .label-config .label-purple }
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required: situational
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{: .label .label-config .label-yellow }
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</div>
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The shared secret between Authelia and the application consuming this client. This secret must
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match the secret configured in the application. Currently this is stored in plain text.
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You must [generate this option yourself](#generating-a-random-secret).
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This must be provided when the client is a confidential client type, and must be blank when using the public client
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type. To set the client type to public see the [public](#public) configuration option.
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#### public
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<div markdown="1">
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type: bool
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{: .label .label-config .label-purple }
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default: false
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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This enables the public client type for this client. This is for clients that are not capable of maintaining
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confidentiality of credentials, you can read more about client types in [RFC6749](https://datatracker.ietf.org/doc/html/rfc6749#section-2.1).
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This is particularly useful for SPA's and CLI tools. This option requires setting the [client secret](#secret) to a
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blank string.
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In addition to the standard rules for redirect URIs, public clients can use the `urn:ietf:wg:oauth:2.0:oob` redirect URI.
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#### authorization_policy
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<div markdown="1">
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type: string
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{: .label .label-config .label-purple }
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default: two_factor
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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The authorization policy for this client: either `one_factor` or `two_factor`.
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#### audience
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<div markdown="1">
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type: list(string)
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{: .label .label-config .label-purple }
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required: no
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{: .label .label-config .label-green }
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</div>
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A list of audiences this client is allowed to request.
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#### scopes
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<div markdown="1">
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type: list(string)
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{: .label .label-config .label-purple }
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default: openid, groups, profile, email
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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A list of scopes to allow this client to consume. See [scope definitions](#scope-definitions) for more
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information. The documentation for the application you want to use with Authelia will most-likely provide
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you with the scopes to allow.
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#### redirect_uris
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<div markdown="1">
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type: list(string)
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{: .label .label-config .label-purple }
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required: yes
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{: .label .label-config .label-red }
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</div>
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A list of valid callback URIs this client will redirect to. All other callbacks will be considered
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unsafe. The URIs are case-sensitive and they differ from application to application - the community has
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provided [a list of URL´s for common applications](../../community/oidc-integrations.md).
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Some restrictions that have been placed on clients and
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their redirect URIs are as follows:
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1. If a client attempts to authorize with Authelia and its redirect URI is not listed in the client configuration the
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attempt to authorize wil fail and an error will be generated.
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2. The redirect URIs are case-sensitive.
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3. The URI must include a scheme and that scheme must be one of `http` or `https`.
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4. The client can ignore rule 3 and use `urn:ietf:wg:oauth:2.0:oob` if it is a [public](#public) client type.
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#### grant_types
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<div markdown="1">
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type: list(string)
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{: .label .label-config .label-purple }
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default: refresh_token, authorization_code
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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A list of grant types this client can return. _It is recommended that this isn't configured at this time unless you
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know what you're doing_. Valid options are: `implicit`, `refresh_token`, `authorization_code`, `password`,
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`client_credentials`.
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#### response_types
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<div markdown="1">
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type: list(string)
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{: .label .label-config .label-purple }
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default: code
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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A list of response types this client can return. _It is recommended that this isn't configured at this time unless you
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know what you're doing_. Valid options are: `code`, `code id_token`, `id_token`, `token id_token`, `token`,
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`token id_token code`.
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#### response_modes
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<div markdown="1">
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type: list(string)
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{: .label .label-config .label-purple }
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default: form_post, query, fragment
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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A list of response modes this client can return. It is recommended that this isn't configured at this time unless you
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know what you're doing. Potential values are `form_post`, `query`, and `fragment`.
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#### userinfo_signing_algorithm
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<div markdown="1">
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type: string
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{: .label .label-config .label-purple }
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default: none
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{: .label .label-config .label-blue }
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required: no
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{: .label .label-config .label-green }
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</div>
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The algorithm used to sign the userinfo endpoint responses. This can either be `none` or `RS256`.
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## Generating a random secret
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If you must provide a random secret in configuration, you can generate a random string of sufficient length. The command
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```sh
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LENGTH=64
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tr -cd '[:alnum:]' < /dev/urandom | fold -w "${LENGTH}" | head -n 1 | tr -d '\n' ; echo
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```
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prints such a string with a length in characters of `${LENGTH}` on `stdout`. The string will only contain alphanumeric
|
||
characters. For Kubernetes, see [this section too](../secrets.md#Kubernetes).
|
||
|
||
## Scope Definitions
|
||
|
||
### openid
|
||
|
||
This is the default scope for openid. This field is forced on every client by the configuration
|
||
validation that Authelia does.
|
||
|
||
|JWT Field|JWT Type |Authelia Attribute|Description |
|
||
|:-------:|:-----------:|:----------------:|:-------------------------------------------:|
|
||
|sub |string |Username |The username the user used to login with |
|
||
|scope |string |scopes |Granted scopes (space delimited) |
|
||
|scp |array[string]|scopes |Granted scopes |
|
||
|iss |string |hostname |The issuer name, determined by URL |
|
||
|at_hash |string |_N/A_ |Access Token Hash |
|
||
|aud |array[string]|_N/A_ |Audience |
|
||
|exp |number |_N/A_ |Expires |
|
||
|auth_time|number |_N/A_ |The time the user authenticated with Authelia|
|
||
|rat |number |_N/A_ |The time when the token was requested |
|
||
|iat |number |_N/A_ |The time when the token was issued |
|
||
|jti |string(uuid) |_N/A_ |JWT Identifier |
|
||
|
||
### groups
|
||
|
||
This scope includes the groups the authentication backend reports the user is a member of in the token.
|
||
|
||
|JWT Field|JWT Type |Authelia Attribute|Description |
|
||
|:-------:|:-----------:|:----------------:|:--------------------:|
|
||
|groups |array[string]|Groups |The users display name|
|
||
|
||
### email
|
||
|
||
This scope includes the email information the authentication backend reports about the user in the token.
|
||
|
||
|JWT Field |JWT Type |Authelia Attribute|Description |
|
||
|:------------:|:-----------:|:----------------:|:-------------------------------------------------------:|
|
||
|email |string |email[0] |The first email address in the list of emails |
|
||
|email_verified|bool |_N/A_ |If the email is verified, assumed true for the time being|
|
||
|alt_emails |array[string]|email[1:] |All email addresses that are not in the email JWT field |
|
||
|
||
### profile
|
||
|
||
This scope includes the profile information the authentication backend reports about the user in the token.
|
||
|
||
|JWT Field|JWT Type|Authelia Attribute|Description |
|
||
|:-------:|:------:|:----------------:|:--------------------:|
|
||
|name |string | display_name |The users display name|
|
||
|
||
## Endpoint Implementations
|
||
|
||
This is a table of the endpoints we currently support and their paths. This can be requrired information for some RP's,
|
||
particularly those that don't use [discovery](https://openid.net/specs/openid-connect-discovery-1_0.html). The paths are
|
||
appended to the end of the primary URL used to access Authelia. For example in the Discovery example provided you access
|
||
Authelia via https://auth.example.com, the discovery URL is https://auth.example.com/.well-known/openid-configuration.
|
||
|
||
|Endpoint |Path |
|
||
|:-----------:|:------------------------------:|
|
||
|Discovery |.well-known/openid-configuration|
|
||
|JWKS |api/oidc/jwks |
|
||
|Authorization|api/oidc/authorize |
|
||
|Token |api/oidc/token |
|
||
|Introspection|api/oidc/introspect |
|
||
|Revocation |api/oidc/revoke |
|
||
|Userinfo |api/oidc/userinfo |
|
||
|
||
[OpenID Connect]: https://openid.net/connect/
|
||
[token lifespan]: https://docs.apigee.com/api-platform/antipatterns/oauth-long-expiration
|