RFR: 8284926: Share the certificate NamedGroup in SignatureScheme::getSignerOfPreferableAlgorithm

[XenoAmess]

On Sat, 16 Apr 2022 13:59:25 GMT, John Jiang <jjiang at openjdk.org> wrote:

> It would not to generate the certificate's ECParameterSpec and NamedGroup multiple times in method `SignatureScheme::getSignerOfPreferableAlgorithm`.

src/java.base/share/classes/sun/security/ssl/SignatureScheme.java line 494:

> 492:                             x509Possession.getECParameterSpec();
> 493:                     if (params != null &&
> 494:                             ss.namedGroup == NamedGroup.valueOf(params)) {

look at here.
if : param == null and namedGroup == null and ss.namedGroup == null,
the codes before this change will not enter the if branch, but the codes after this changes will enter the if branch.

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PR: https://git.openjdk.java.net/jdk/pull/8271