RFR: 8359956: Support algorithm constraints and certificate checks in SunX509 key manager [v14]

[Artur Barashev]

On Tue, 29 Jul 2025 18:20:54 GMT, Artur Barashev <abarashev at openjdk.org> wrote:

>> test/jdk/sun/security/ssl/X509KeyManager/PeerConstraintsCheck.java line 74:
>> 
>>> 72:  * This class tests against the peer supported certificate signatures sent in
>>> 73:  * "signature_algorithms_cert" extension.
>>> 74:  */
>> 
>> Can you add a sentence or two about why the test should fail when the SunX509 KM is used and the certCheck property is enabled or the PKIX KM is used? I think it is because the server's cert is signed with SHA256withECDSA and the "signature_algorithms_cert" extension is set to SHA384withECDSA, so it must be signed with SHA384withECDSA, is that right?
>
> Yes, correct: `jdk.tls.client.SignatureSchemes` and `jdk.tls.server.SignatureSchemes` system properties set signature schemes for both "signature_algorithms" and "signature_algorithms_cert" extensions. Then we fail because server's certificate is signed with `SHA256withECDSA`. I'll update the comment to highlight that detail.

BTW, by using the above system properties we also bypass this check in the process:
https://github.com/openjdk/jdk/blob/ea754316fd6d691a701dfb4bc921ea8c92dc5dd4/src/java.base/share/classes/sun/security/ssl/CertificateMessage.java#L1011

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PR Review Comment: https://git.openjdk.org/jdk/pull/25016#discussion_r2240642639