RFR: 8354990: Improve negative tests coverage for jpackage signing

Mon Apr 21 21:34:59 UTC 2025

On Fri, 18 Apr 2025 21:11:35 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

> Add tests for the following test cases:
>  - Expired certificate specified for signing;
>  - Multiple certificates with the same name in one keychain.
> 
> Adding the new tests revealed an issue with MacCertificate - [JDK-8354989](https://bugs.openjdk.org/browse/JDK-8354989). This issue is also addressed in this PR.
> 
> Additionally:
>  - Moved code to verify signatures in MacSignVerify class and reworked SigningBase verify functions to use MacSignVerify API.

@sashamatveev PTAL

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PR Comment: https://git.openjdk.org/jdk/pull/24762#issuecomment-2819546107