[jira] Closed: (SLING-1831) Prevent Login Request loop

["Carsten Ziegeler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SLING-1831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Carsten Ziegeler closed SLING-1831.
-----------------------------------


> Prevent Login Request loop
> --------------------------
>
>                 Key: SLING-1831
>                 URL: https://issues.apache.org/jira/browse/SLING-1831
>             Project: Sling
>          Issue Type: Improvement
>          Components: Authentication
>    Affects Versions: Auth Core 1.0.2
>            Reporter: Felix Meschberger
>            Assignee: Felix Meschberger
>             Fix For: Auth Core 1.0.4
>
>
> Depending on AuthenticationHandler specifics it is conceivable that the Sling Authenticator support may enter an endless redirect loop with the client.
> Consider this:
>   #1 client provides wrong credentials (e.g. cookie, HTTP Basic authentication header)
>   #2 authenticator decides to call AuthenticationHandler.requestCredentials
>   #3 authentication handler sends a redirect to the client
>   #4 client requests redirect target again providing wrong credentials
>   #5 authenticator decides to call AuthenticationHandler.requestCredentials
>   #6 continue with step #3
> This loop should be broken in the authenticator: As soon as the authenticator recognizes a (potential) redirect loop, the authentication handler should not be called again but instead an immediate error response should be sent back.

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