RFR: 8284694: Avoid evaluating SSLAlgorithmConstraints twice

[Claes Redestad]

On Tue, 12 Apr 2022 11:28:12 GMT, Daniel Jeliński <djelinski at openjdk.org> wrote:

> During TLS handshake, hundreds of constraints are evaluated to determine which cipher suites are usable. Most of the evaluations are performed using `HandshakeContext#algorithmConstraints` object. By default that object contains a `SSLAlgorithmConstraints` instance wrapping another `SSLAlgorithmConstraints` instance. As a result the constraints defined in `SSLAlgorithmConstraints` are evaluated twice.
> 
> This PR improves the default case; if the user-specified constraints are left at defaults, we use a single `SSLAlgorithmConstraints` instance, and avoid duplicate checks.

Marked as reviewed by redestad (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/8199