RFR: 8217633: Configurable extensions with system properties [v2]

[Rajan Halade]

On Mon, 25 Jan 2021 22:17:56 GMT, Xue-Lei Andrew Fan <xuelei at openjdk.org> wrote:

>> The TLS protocols are designed to tolerant unknown TLS extensions. However, although it is not common, there are a few TLS implementations that cannot handle unknown extensions properly. As results in unexpected interoperability issue when new extensions are introduced in JDK. The interoperability impact could be mitigated If applications can customize the extensions if needed.
>> 
>> With this update, two system properties are added to configure the default extensions in either client or server side of TLS connections.  Please note that the impact of blocking TLS extensions is complicated.  For example, a TLS connection may not be able to established if a mandatory extension is blocked.  Please don't use this feature unless you clearly understand the impact.
>> 
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8217633 
>> CSR: https://bugs.openjdk.java.net/browse/JDK-8217993
>
> Xue-Lei Andrew Fan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update copyright years to 2021

Marked as reviewed by rhalade (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/1752