RFR: 8298420: PEM API: Implementation (Preview)

[Anthony Scarpino]

On Wed, 24 Jan 2024 00:01:06 GMT, Anthony Scarpino <ascarpino at openjdk.org> wrote:

> Hi all,
> 
> I need a code review of the PEM API.  Privacy-Enhanced Mail (PEM) is a format for encoding and decoding cryptographic keys and certificates.  It will be integrated into JDK24 as a Preview Feature.  Preview features does not permanently define the API and it is subject to change in future releases until it is finalized.
> 
> Details about this change can be seen at [PEM API JEP](https://bugs.openjdk.org/browse/JDK-8300911).
> 
> Thanks
> 
> Tony

As I was exploring an idea for updates to the API, I came across a code optimization that I wanted to get into this code review as quickly as possible since I just announced the code review.  It makes handing the internals of the PEM structures much easier.

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PR Comment: https://git.openjdk.org/jdk/pull/17543#issuecomment-2251910396