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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, backend_config)

Bases: object

OpenID Connect Identity Provider abstract interface.

__init__(provider, config, backend_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.
• backend_config (xml.etree.ElementTree.Element) – Is the configuration element of the backend of the provider from the configuration file (e.g., oidc_backends_config.xml). This element contains all the backend-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 tuple:

a tuple of redirect_url and user.

disconnect(provider, trans, disconnect_redirect_url=None)

Submodules

galaxy.authnz.custos_authnz module

class galaxy.authnz.custos_authnz.CustosAuthnz(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)

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).

static can_user_assume_authn(trans, authn_id)

static try_get_authz_config(sa_session, user_id, authz_id)

It returns a cloudauthz config (see model.CloudAuthz) with the given ID; and raise an exception if either a config with given ID does not exist, or the configuration is defined for a another user than trans.user.

Parameters:

• trans (galaxy.web.framework.webapp.GalaxyWebTransaction) – Galaxy web transaction
• authz_id (int) – The ID of a CloudAuthz configuration to be used for getting temporary credentials.

:rtype : model.CloudAuthz :return: a cloudauthz configuration.

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)

get_cloud_access_credentials(cloudauthz, sa_session, user_id, request=None)

This method leverages CloudAuthz (https://github.com/galaxyproject/cloudauthz) to request a cloud-based resource provider (e.g., Amazon AWS, Microsoft Azure) for temporary access credentials to a given resource.

It first checks if a cloudauthz config with the given ID (authz_id) is available and can be assumed by the user, and raises an exception if either is false. Otherwise, it then extends the cloudauthz configuration as required by the CloudAuthz library for the provider specified in the configuration. For instance, it adds on-the-fly values such as a valid OpenID Connect identity token, as required by CloudAuthz for AWS. Then requests temporary credentials from the CloudAuthz library using the updated configuration.

Parameters:

• cloudauthz (CloudAuthz) – an instance of CloudAuthz to be used for getting temporary credentials.
• sa_session (sqlalchemy.orm.scoping.scoped_session) – SQLAlchemy database handle.
• user_id (int) – Decoded Galaxy user ID.
• request (galaxy.web.framework.base.Request) – Encapsulated HTTP(S) request.

Return type:

dict

Returns:

a dictionary containing credentials to access a cloud-based resource provider. See CloudAuthz (https://github.com/galaxyproject/cloudauthz) for details on the content of this dictionary.

get_cloud_access_credentials_in_file(new_file_path, cloudauthz, sa_session, user_id, request=None)

This method leverages CloudAuthz (https://github.com/galaxyproject/cloudauthz) to request a cloud-based resource provider (e.g., Amazon AWS, Microsoft Azure) for temporary access credentials to a given resource.

This method uses the get_cloud_access_credentials method to obtain temporary credentials, and persists them to a (temporary) file, and returns the file path.

Parameters:

• new_file_path (str) – Where dataset files are saved on temporary storage. See app.config.new_file_path.
• cloudauthz (CloudAuthz) – an instance of CloudAuthz to be used for getting temporary credentials.
• sa_session (sqlalchemy.orm.scoping.scoped_session) – SQLAlchemy database handle.
• user_id (int) – Decoded Galaxy user ID.
• request (galaxy.web.framework.base.Request) – [Optional] Encapsulated HTTP(S) request.

Return type:

str

Returns:

The filename to which credentials are written.

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(request, session, storage, config, tpl=None)

Bases: social_core.strategy.BaseStrategy

__init__(request, session, 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

Bases: object

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.on_the_fly_config(sa_session)

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.