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OpenID Connect Dynamic Client Registration

Ory Hydra is capable of exposing

endpoints and capabilities. This feature allows third parties to create OAuth2 Clients in self-service, without administrative privileges. The feature is disabled by default!

This is particularly useful if you are running a public service and want users to be able to create their own OAuth2 clients.

To enable this feature, set the following configuration option:

oidc:
  dynamic_client_registration:
    enabled: true

Enabling this feature will add listeners to the following four routes at the public endpoint:

  • POST /oauth2/register - Register a new OAuth2 Client;
  • GET /oauth2/register/<client_id> - Fetch the OAuth2 Client;
  • PUT /oauth2/register/<client_id> - Update the OAuth2 Client;
  • DELETE /oauth2/register/<client_id> - Delete the OAuth2 Client;

Register OAuth2 & OpenID Connect Clients​

If OpenID Connect Dynamic Client Registration is enabled, registering a new OAuth2 Client is as simple as:

import ory "github.com/ory/hydra-client-go"

func newSDK(port int, host string) *ory.APIClient {
    conf := ory.NewConfiguration()
    conf.Servers = ory.ServerConfigurations{ory.ServerConfiguration{URL: "https://<slug>.projects.oryapis.com"}}
    return ory.NewAPIClient(conf)
}

func createDynamicClient() (*ory.OAuth2Client, error) {
    c, _, err := newSDK().V0Alpha2.
        DynamicClientRegistrationCreateOAuth2Client(context.Background()).
        OAuth2Client(ory.OAuth2Client{ /* ClientName: "..." */ }).Execute()
    return c, err
}
note

The registration_access_token will only be sent once! You need to store this token in a secure location. This token will be used to update the OAuth2 Client.

Please note that it isn't possible to set OAuth2 Client Metadata, the OAuth2 Client ID nor the OAuth2 Client Secret using this endpoint. This ensure that third parties follow the strict security guidlines of the system.

The metadata field is protected and privileged and can only be set using the administrative endpoint! OAuth2 Client Metadata can also not be read using OpenID Connect Dynamic Client Registration endpoints!

Manage OAuth2 & OpenID Connect Clients​

The POST endpoint requires the client to authenticate with the registration_access_token regardless of the token_endpoint_auth_method. It can be used to update the OAuth2 Client.

// ...
func updateDynamicClient(client *ory.OAuth2Client) (*ory.OAuth2Client, error) {
    c, _, err := newSDK(publicPort, host).V0Alpha2.
        DynamicClientRegistrationUpdateOAuth2Client(
            context.WithValue(context.Background(), hydra.ContextAccessToken, *client.RegistrationAccessToken),
            *client.ClientId,
        ).
        OAuth2Client(*client).
        Execute()

    // Don't forget to store the update `registration_access_token`!
    // newToken := *c.RegistrationAccessToken

    return c, err
}

The response will include the updated OAuth2 Client.

note

When updating the OAuth2 Client, the server will respond with a new registration access token. The old one will become invalid!

{
  "client_id": "...",
  "registration_access_token": "..."
  ...
}

Get OAuth2 & OpenID Connect Clients​

The GET endpoint requires the client to authenticate with the registration_access_token regardless of the token_endpoint_auth_method. It can be used to retrieve the OAuth2 Client.

// ...
func getDynamicClient(client *ory.OAuth2Client) (*ory.OAuth2Client, error) {
    c, _, err := newSDK(publicPort, host).V0Alpha2.
        DynamicClientRegistrationGetOAuth2Client(
            context.WithValue(context.Background(), hydra.ContextAccessToken, *client.RegistrationAccessToken),
            *client.ClientId,
        ).Execute()
    return c, err
}

Delete OAuth2 & OpenID Connect Clients​

The DELETE endpoint requires the client to authenticate with the registration_access_token regardless of the token_endpoint_auth_method. It can be used to delete the OAuth2 Client.

// ...
func deleteDynamicClient(client *ory.OAuth2Client) (error) {
    _, err := newSDK(publicPort, host).V0Alpha2.
        DynamicClientRegistrationDeleteOAuth2Client(
            context.WithValue(context.Background(), hydra.ContextAccessToken, *client.RegistrationAccessToken),
            *client.ClientId,
        ).Execute()
    return err
}