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galaxy.authnz package

Contains implementations for authentication and authorization against an OpenID Connect (OIDC) Identity Provider (IdP).

This package follows “authorization code flow” authentication protocol to authenticate Galaxy users against third-party identity providers.

Additionally, this package implements functionalist’s to request temporary access credentials for cloud-based resource providers (e.g., Amazon AWS, Microsoft Azure).

class galaxy.authnz.IdentityProvider(provider, config)

Bases: object

OpenID Connect Identity Provider abstract interface.

__init__(provider, config)

Initialize the identity provider using the provided configuration, and raise a ParseError (or any more related specific exception) in case the configuration is malformed.

Parameters:

• provider (string) – is the name of the identity provider (e.g., Google).
• config (xml.etree.ElementTree.Element) – Is the configuration element of the provider from the configuration file (e.g., oidc_config.xml). This element contains the all the provider-specific configuration elements.

authenticate(provider, trans)

Runs for authentication process. Checks the database if a valid identity exists in the database; if yes, then the user is authenticated, if not, it generates a provider-specific authentication flow and returns redirect URI to the controller.

Parameters:trans (GalaxyWebTransaction) – Galaxy web transaction. Returns:a redirect URI to the provider’s authentication endpoint.

callback(state_token, authz_code, trans, login_redirect_url)

Handles authentication call-backs from identity providers. This process maps state-token to a user :type state_token: string :param state_token: is an anti-forgery token which identifies

a Galaxy user to whom the given authorization code belongs to.

Parameters:

• authz_code (string) – a very short-lived, single-use token to request a refresh token.
• trans (GalaxyWebTransaction) – Galaxy web transaction.

Return boolean:

True: if callback is handled successfully. False: if processing callback fails, then Galaxy attempts re-authentication.

disconnect(provider, trans, disconnect_redirect_url=None)

Submodules

galaxy.authnz.managers module

class galaxy.authnz.managers.AuthnzManager(app, oidc_config_file, oidc_backends_config_file)

Bases: object

__init__(app, oidc_config_file, oidc_backends_config_file)

Parameters:

• app (galaxy.app.UniverseApplication) –
• config (string) – sets the path for OIDC configuration file (e.g., oidc_backends_config.xml).

authenticate(provider, trans)

Parameters:

• provider (string) – set the name of the identity provider to be used for authentication flow.
• trans (GalaxyWebTransaction) – Galaxy web transaction.

Returns:

an identity provider specific authentication redirect URI.

callback(provider, state_token, authz_code, trans, login_redirect_url)

disconnect(provider, trans, disconnect_redirect_url=None)

galaxy.authnz.psa_authnz module

class galaxy.authnz.psa_authnz.PSAAuthnz(provider, oidc_config, oidc_backend_config)

Bases: galaxy.authnz.IdentityProvider

__init__(provider, oidc_config, oidc_backend_config)

authenticate(trans)

callback(state_token, authz_code, trans, login_redirect_url)

disconnect(provider, trans, disconnect_redirect_url=None, association_id=None)

class galaxy.authnz.psa_authnz.Strategy(trans, storage, config, tpl=None)

Bases: social_core.strategy.BaseStrategy

__init__(trans, storage, config, tpl=None)

get_setting(name)

session_get(name, default=None)

session_set(name, value)

session_pop(name)

request_data(merge=True)

request_host()

build_absolute_uri(path=None)

redirect(url)

html(content)

render_html(tpl=None, html=None, context=None)

start()

complete(*args, **kwargs)

continue_pipeline(*args, **kwargs)

class galaxy.authnz.psa_authnz.Storage

user

alias of galaxy.model.UserAuthnzToken

nonce

alias of galaxy.model.PSANonce

association

alias of galaxy.model.PSAAssociation

code

alias of galaxy.model.PSACode

partial

alias of galaxy.model.PSAPartial

classmethod is_integrity_error(exception)

galaxy.authnz.psa_authnz.contains_required_data(response=None, is_new=False, **kwargs)

This function is called as part of authentication and authorization pipeline before user is authenticated or authorized (see AUTH_PIPELINE).

This function asserts if all the data required by Galaxy for a user is provided. It raises an exception if any of the required data is missing, and returns void if otherwise.

Parameters:

• response (dict) –

  a dictionary containing decoded response from OIDC backend that contain the following keys among others: - id_token; see: http://openid.net/specs/openid-connect-core-1_0.html#IDToken - access_token; see: https://tools.ietf.org/html/rfc6749#section-1.4 - refresh_token; see: https://tools.ietf.org/html/rfc6749#section-1.5 - token_type; see: https://tools.ietf.org/html/rfc6750#section-6.1.1 - scope; see: http://openid.net/specs/openid-connect-core-1_0.html#AuthRequest - expires_in; is the expiration time of the access and ID tokens in seconds since

  the response was generated.

• is_new (bool) – has the user been authenticated?
• kwargs – may contain the following keys among others: - uid: user ID - user: Galaxy user; if user is already authenticated - backend: the backend that is used for user authentication. - storage: an instance of Storage class. - strategy: an instance of the Strategy class. - state: the state code received from identity provider. - details: details about the user’s third-party identity as requested in scope.

Return type:

void

Returns:

Raises an exception if any of the required arguments is missing, and pass if all are given.

galaxy.authnz.psa_authnz.allowed_to_disconnect(name=None, user=None, user_storage=None, strategy=None, backend=None, request=None, details=None, **kwargs)

Disconnect is the process of disassociating a Galaxy user and a third-party authnz. In other words, it is the process of removing any access and/or ID tokens of a user. This function should raise an exception if disconnection is NOT permitted. Do NOT return any value (except an empty dictionary) if disconnect is allowed. Because, at least until PSA social_core v.1.5.0, any returned value (e.g., Boolean) will result in ignoring the rest of the disconnect pipeline. See the following condition in run_pipeline function: https://github.com/python-social-auth/social-core/blob/master/social_core/backends/base.py#L114 :param name: name of the backend (e.g., google-openidconnect) :type user: galaxy.model.User :type user_storage: galaxy.model.UserAuthnzToken :type strategy: galaxy.authnz.psa_authnz.Strategy :type backend: PSA backend object (e.g., social_core.backends.google_openidconnect.GoogleOpenIdConnect) :type request: webob.multidict.MultiDict :type details: dict :return: empty dict

galaxy.authnz.psa_authnz.disconnect(name=None, user=None, user_storage=None, strategy=None, backend=None, request=None, details=None, **kwargs)

Disconnect is the process of disassociating a Galaxy user and a third-party authnz. In other words, it is the process of removing any access and/or ID tokens of a user. :param name: name of the backend (e.g., google-openidconnect) :type user: galaxy.model.User :type user_storage: galaxy.model.UserAuthnzToken :type strategy: galaxy.authnz.psa_authnz.Strategy :type backend: PSA backend object (e.g., social_core.backends.google_openidconnect.GoogleOpenIdConnect) :type request: webob.multidict.MultiDict :type details: dict :return: void or empty dict. Any key-value pair inside the dictionary will be available inside PSA only, and will be passed to the next step in the disconnect pipeline. However, the key-value pair will not be returned as a result of calling the do_disconnect function. Additionally, returning any value except for a(n) (empty) dictionary, will break the disconnect pipeline, and that value will be returned as a result of calling the do_disconnect function.