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https://issues.apache.org/jira/browse/OAK-8763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16973480#comment-16973480
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Manfred Baedke commented on OAK-8763:
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See https://issues.apache.org/jira/secure/attachment/12985222/logout.png for an
example of a preexisting readonly subject not featuring the principals and
credentials it's supposed to hold (note that LoginModuleImpl#credentials holds
ImpersonationCredentials not to be found in the subject.
> LoginContextProviderImpl uses any subject found in the AccessControlContext.
> ----------------------------------------------------------------------------
>
> Key: OAK-8763
> URL: https://issues.apache.org/jira/browse/OAK-8763
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: security-spi
> Reporter: Manfred Baedke
> Assignee: Angela Schreiber
> Priority: Major
>
> LoginContextProviderImpl#getLoginContext(...) extracts the most recent
> subject from the AccessControlContext and the uses it for either a
> PreAuthContext or a JaasLoginContext. This is wrong, because there is no
> reason to assume that such a subject has anything to do with Oak. It
> particularly hurts when it's readonly, because JAAS will then silently fail
> to add principals and credentials.
> We would need a way to identify pre-authenticated subjects and subjects that
> are not pre-authenticated should not be used to create a JaasLoginContext.
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