RFR: 8298420: PEM API: Implementation (Preview) [v16]

[Weijun Wang]

On Thu, 8 May 2025 20:40:28 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
>
> Anthony Scarpino has updated the pull request incrementally with three additional commits since the last revision:
> 
>  - comments
>  - toString update
>  - non-sealed
>    Better X509 KeyPair parsing

src/java.base/share/classes/java/security/PEMRecord.java line 51:

> 49:  * reached the end of the stream. If there is PEM data, {@code type} and
> 50:  * {@code pem} will both be non-null. {@code leadingData} may be null if the
> 51:  * input data only contains PEM data. All values can never be null.

It feels like the 2 paragraphs above should be in the spec of `Decoder::decode`. Here we only need to say what fields can be null.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17543#discussion_r2082643373