RFR: 8353113: Peer supported certificate signature algorithms are not being checked with default SunX509 key manager [v3]

[Hai-May Chao]

On Mon, 12 May 2025 20:05:18 GMT, Artur Barashev <abarashev at openjdk.org> wrote:

>> When the deafult SunX509KeyManagerImpl is being used we are in violation of TLSv1.3 RFC spec because we ignore peer supported certificate signatures sent to us in "signature_algorithms"/"signature_algorithms_cert" extensions:
>> https://datatracker.ietf.org/doc/html/rfc8446#section-4.4.2.2
>> https://datatracker.ietf.org/doc/html/rfc8446#section-4.4.2.3
>> 
>> X509KeyManagerImpl on the other hand includes the algorithms sent by the peer in "signature_algorithms_cert" extension (or in "signature_algorithms" extension when "signature_algorithms_cert" extension isn't present) in the algorithm constraints being checked.
>
> Artur Barashev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Make sure the exception happens during KeyManager's algorithm check

It is nice to refactor the common code for algorithm constraints checking into a new class, `X509KeyManagerConstraints.java`, used by both `SunX509KeyManagerImpl` and `X509KeyManagerImpl`. However, it looks like a new system property, "jdk.tls.keymanager.disableConstraintsChecking", is introduced, and it will affect both `SunX509KeyManagerImpl` and `X509KeyManagerImpl`. When setting this property to true, it will disable the existing RFC compliant algorithm constraints checking even in `X509KeyManagerImpl`, and we’d want to avoid that.

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PR Comment: https://git.openjdk.org/jdk/pull/25016#issuecomment-2874984309