RFR: 8348986: Improve coverage of enhanced exception messages [v19]

[Daniel Fuchs]

On Tue, 3 Jun 2025 08:14:48 GMT, Michael McMahon <michaelm at openjdk.org> wrote:

>> Hi,
>> 
>> Enhanced exception messages are designed to hide sensitive information such as hostnames, IP 
>> addresses from exception message strings, unless the enhanced mode for the specific category 
>> has been explicitly enabled. Enhanced exceptions were first introduced in 8204233 in JDK 11 and 
>> updated in 8207846.
>> 
>> This PR aims to increase the coverage of enhanced exception messages in the networking code.
>> A limited number of exceptions are already hidden (restricted) by default. The new categories and 
>> exceptions in this PR will be restricted on an opt-in basis, ie. the default mode will be enhanced
>> (while preserving the existing behavior).
>> 
>> The mechanism is controlled by the security/system property "jdk.includeInExceptions" which takes as value
>> a comma separated list of category names, which identify groups of exceptions where the exception
>> message may be enhanced. Any category not listed is "restricted" which means that potentially
>> sensitive information (such as hostnames, IP addresses, user identities) are excluded from the message text.
>> 
>> The changes to the java.security conf file describe the exact changes in terms of the categories now
>> supported and any changes in behavior.
>> 
>> Thanks,
>> Michael
>
> Michael McMahon has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 39 commits:
> 
>  - Merge branch 'master' into 8348986-exceptions
>  - doc update to java.security
>  - removed jmod/Handler change
>  - doc update to java.security
>  - Fixed problem with j.n.HostPortRange
>  - typo in suggestions and other issues
>  - Merge branch 'master' into 8348986-exceptions
>  - Apply suggestions from code review
>    
>    Co-authored-by: Daniel Fuchs <67001856+dfuch at users.noreply.github.com>
>  - Additional callsites identified by Mark S.
>  - Merge branch 'master' into 8348986-exceptions
>  - ... and 29 more: https://git.openjdk.org/jdk/compare/dbf562c7...ab6387d8

Marked as reviewed by dfuchs (Reviewer).

-------------

PR Review: https://git.openjdk.org/jdk/pull/23929#pullrequestreview-2892334027