> 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.
> 
> **SUNX509 KeyManager performance before the change**
> Benchmark                                    (resume)  (tlsVersion)   Mode  
> Cnt      Score     Error  Units
> SSLHandshake.doHandshake      true       TLSv1.2  thrpt   15  19758.012 ± 
> 758.237  ops/s
> SSLHandshake.doHandshake      true           TLS  thrpt   15   1861.695 ±  
> 14.681  ops/s
> SSLHandshake.doHandshake     false       TLSv1.2  thrpt   15   **1186.962** ± 
>  12.085  ops/s
> SSLHandshake.doHandshake     false           TLS  thrpt   15   **1056.288** ± 
>   7.197  ops/s
> 
> **SUNX509 KeyManager performance after the change**
> Benchmark                 (resume)  (tlsVersion)   Mode  Cnt      Score     
> Error  Units
> SSLHandshake.doHandshake      true       TLSv1.2  thrpt   15  20954.399 ± 
> 260.817  ops/s
> SSLHandshake.doHandshake      true           TLS  thrpt   15   1813.401 ±  
> 13.917  ops/s
> SSLHandshake.doHandshake     false       TLSv1.2  thrpt   15   **1158.190** ± 
>   6.023  ops/s
> SSLHandshake.doHandshake     false           TLS  thrpt   15   **1012.988** ± 
>  10.943  ops/s

Artur Barashev has updated the pull request incrementally with one additional 
commit since the last revision:

  Add more unit tests. Some code refactoring and adjustments.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25016/files
  - new: https://git.openjdk.org/jdk/pull/25016/files/448442e9..eaf343ad

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25016&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25016&range=04-05

  Stats: 171 lines in 5 files changed: 106 ins; 36 del; 29 mod
  Patch: https://git.openjdk.org/jdk/pull/25016.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25016/head:pull/25016

PR: https://git.openjdk.org/jdk/pull/25016

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