Configuring OAuth

The OAuth component will stop any user from accessing the application before first logging into the selected provider. The configuration to set up OAuth is all handled via the global pn.config object, which has a number of OAuth related parameters. When launching the application via the panel serve CLI command these config options can be set as CLI arguments or environment variables, when using the pn.serve function on the other hand these variables can be passed in as arguments.

oauth_provider

The first step in configuring a OAuth is to specify a specific OAuth provider. Panel ships with a number of providers by default:

• azure: Azure Active Directory

• bitbucket: Bitbucket

• github: GitHub

• gitlab: GitLab

• google: Google

• okta: Okta

• generic: Generic OAuth Provider with configurable endpoints

• password: Generic password grant based OAuth Provider with configurable endpoints

• auth_code: Generic code challenge grant based OAuth Provider with configurable endpoints

We will go through the process of configuring each of these individually in Providers but for now all we need to know that the oauth_provider can be set on the commandline using the --oauth-provider CLI argument to panel serve or the PANEL_OAUTH_PROVIDER environment variable.

Examples:

panel serve oauth_example.py --oauth-provider=...

PANEL_OAUTH_PROVIDER=... panel serve oauth_example.py

or in Python:

pn.serve(app, oauth_provider=...)

Endpoints

The login and logout endpoints are configurable:

panel serve oauth_example.py --login-endpoint /signin --logout-endpoint /signoff ...

or in Python:

pn.serve(app, login_endpoint="/signin", logout_endpoint="/signoff", ...)

or in Python:

oauth_key and oauth_secret

To authenticate with a OAuth provider we generally require two pieces of information (although some providers will require more customization):

1. The Client ID is a public identifier for apps.

2. The Client Secret is a secret known only to the application and the authorization server.

These can be configured in a number of ways the client ID and client secret can be supplied to the panel serve command as --oauth-key and --oauth-secret CLI arguments or PANEL_OAUTH_KEY and PANEL_OAUTH_SECRET environment variables respectively.

Examples:

panel serve oauth_example.py --oauth-key=... --oauth-secret=...

PANEL_OAUTH_KEY=... PANEL_OAUTH_KEY=... panel serve oauth_example.py ...

or in Python:

pn.serve(app, oauth_key=..., oauth_secret=..., ...)

The only exception to authenticating with a oauth_secret are the generic password and code challenge based OAuth providers. If you picked one of these then you must only provide the client ID using the --oauth-key CLI argument or PANEL_OAUTH_KEY environment variable.

oauth_extra_params

Some OAuth providers will require some additional configuration options which will become part of the OAuth URLs. The oauth_extra_params configuration variable allows providing this additional information and can be set using the --oauth-extra-params CLI argument or PANEL_OAUTH_EXTRA_PARAMS.

Examples:

panel serve oauth_example.py --oauth-extra-params="{'tenant_id': ...}"

PANEL_OAUTH_EXTRA_PARAMS={'tenant_id': ...} panel serve oauth_example.py ...

or in Python:

pn.serve(app, oauth_extra_params={'tenant_id': ...}, ...)

The oauth_extra_params can also be used to provide the authentication URLs for the 'generic', 'password', and 'auth_code' OAuth providers. Specifically you can provide a 'AUTHORIZE_URL', 'TOKEN_URL' and 'USER_URL' as extra parameters. Lastly it may be used to define the scopes.

cookie_secret

Once authenticated the user information and authorization token will be set as secure cookies. Cookies are not secure and can easily be modified by clients. A secure cookie ensures that the user information cannot be interfered with or forged by the client by signing it with a secret key. Note that secure cookies guarantee integrity but not confidentiality. That is, the cookie cannot be modified but its contents can be seen by the user. To generate a cookie_secret use the panel secret CLI argument or generate some other random non-guessable string, ideally with at least 256-bits of entropy.

To set the cookie_secret supply --cookie-secret as a CLI argument or set the PANEL_COOKIE_SECRET environment variable.

Examples:

panel serve oauth_example.py --cookie-secret=...

PANEL_COOKIE_SECRET=... panel serve oauth_example.py ...

or in Python:

pn.serve(app, cookie_secret="my-super-secret-secret", ...)

oauth_expiry

The OAuth expiry configuration value determines for how long an OAuth token will be valid once it has been issued. By default it is valid for 1 day, but may be overwritten by providing the duration in the number of days (decimal values are allowed).

To set the oauth_expiry supply --oauth-expiry-days as a CLI argument or set the PANEL_OAUTH_EXPIRY environment variable.

Examples:

panel serve oauth_example.py --oauth-expiry-days=...

PANEL_OAUTH_EXPIRY=... panel serve oauth_example.py ...

Encryption

The architecture of the Bokeh/Panel server means that credentials stored as cookies can be leak in a number of ways. On the initial HTTP(S) request the server will respond with the HTML document that renders the application and this will include an unencrypted token containing the OAuth information. To ensure that the user information and access token are properly encrypted we rely on the Fernet encryption in the cryptography library. You can install it with pip install cryptography or conda install cryptography.

Once installed you will be able to generate a encryption key with panel oauth-secret. This will generate a secret you can pass to the panel serve CLI command using the --oauth-encryption-key argument or PANEL_OAUTH_ENCRYPTION environment variable.

Examples:

panel serve oauth_example.py --oauth-encryption-key=...

PANEL_OAUTH_ENCRYPTION=... panel serve oauth_example.py ...

or in Python:

pn.serve(app, oauth_encryption_key=...)

Redirect URI

Once the OAuth provider has authenticated a user it has to redirect them back to the application, this is what is known as the redirect URI. For security reasons this has to match the URL registered with the OAuth provider exactly. By default Panel will redirect the user straight back to the original URL of your app, e.g. when you’re hosting your app at https://myapp.myprovider.com Panel will use that as the redirect URI. However in certain scenarios you may override this to provide a specific redirect URI (simply the protocol and domain https://myapp.otherprovider.com without the suffix /oauth2/...). This can be achieved with the --oauth-redirect-uri CLI argument or the PANEL_OAUTH_REDIRECT_URI environment variable.

Examples:

panel serve oauth_example.py --oauth-redirect-uri=...

PANEL_OAUTH_REDIRECT_URI=... panel serve oauth_example.py

Scopes

OAuth allows the application to request specific scopes to perform certain actions when authenticating with the provider. To set the scopes you may set the PANEL_OAUTH_SCOPE environment variable or provide it as an argument using the --oauth-extra-params {'scope': ...} CLI argument.

Examples:

panel serve oauth_example.py --oauth-extra-params="{'scope': 'openid'}"

PANEL_OAUTH_SCOPE=openid panel serve oauth_example.py

or in Python:

pn.serve(app, ..., oauth_extra_params={'scope': 'openid'})

Summary

A fully configured OAuth configuration may look like this:

panel serve oauth_example.py --oauth-provider=github --oauth-key=... --oauth-secret=... --cookie-secret=... --oauth-encryption-key=... --oauth-redirect-uri=...

PANEL_OAUTH_PROVIDER=... PANEL_OAUTH_KEY=... PANEL_OAUTH_SECRET=... PANEL_COOKIE_SECRET=... PANEL_OAUTH_ENCRYPTION=... PANEL_OAUTH_REDIRECT_URI=... panel serve oauth_example.py ...`

or in Python:

pn.serve(app, oauth_provider='github', oauth_key=..., oauth_secret=..., cookie_secret=..., oauth_encryption_key=...)

For a generic, password, or code provider you may also have to provide the TOKEN_URL, AUTHORIZE_URL and USER_URL via the --oauth-extra-params CLI argument, OAUTH_EXTRA_PARAMS environment variable or in Python using the oauth_extra_params keyword argument.