How to create a sentry function


Hi all

I want to build a custom authentication scheme that combines a custom authentication and SSO functionality.

1. If the REMOTE_USER Variable HTTP header is set, this user must be a valid user. (Single Sign On feature)

2. If the HTTP header Variable is not set, the LOGIN Page should appear. (local user Administration)

3. the combination user/passowrd of the login page must be validated by my own authentication

I think I need to create a sentry function, which is a combination of the Sentinel-functions that are used in the projects 'tailor-made' and 'HTTP header Variable.

I tried to find an implementation of these functions in the diagram APEX_040200 database, but without success.

@APEX-team: can you provide the implementation of these functions-Sentinel or at least documentation.

@all: is there anyone who have implemented a similar authentication model.

Thank you

Richard

Hi Richard,

a sentry function sets whether the application should be allowed to deal with, because the session is ok. Since the 4.1, we have a function additional Invalid session which runs if the Sentinel returns false, before redirecting to the login page. A callback function can be used to continue the treatment when the login page is external. It runs when the external login is successful and redirects to the APEX. Authentication is used in combination with internal login pages to verify that the credentials of the user (username / password) are ok. If it returns true, the session is updated with the username. Otherwise, the login page must present again, with an error message. The poster disconnection feature runs after the user has disconnected. It is sometimes useful for the cleaning of data for the session or twist the redirection.

In your case, the sentry function is probably not necessary. By default already checks if corresponding to the session id and session cookies, this should be enough. If you try to implement single sign-out, a sentry could check if the session is already authenticated, but the REMOTE_USER will be void. Invalid session function is called when the Sentinel (you're a custom or default) fails. If REMOTE_USER is not null, it can simply call APEX_AUTHENTICATION. POST_LOGIN to save the value of the header under the username, instead of making the normal redirection to the login page. It authenticates the user without checking with authentication credentials. The callback function is not necessary in your case. The authentication function is called when the user connects using the login page for the application (101). It can check the name of user and password for cases where $remote_user@-part is null.

This can be implemented either as a plugin for authentication with the custom authentication scheme. The former is to be preferred to the production code, the latter is sometimes useful for prototyping. The texts point help plugin and authentication for the various functions include example code. If they are not enough, just respond here and I will try to come up with more concrete examples.

Kind regards
Christian

Tags: Database

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