RFR: 8306688: Support Windows serialized keystores (SST files)

[Weijun Wang]

On Fri, 26 May 2023 21:09:35 GMT, Mat Carter <macarte at openjdk.org> wrote:

> Added ability to load keystores from SST files on Windows.  Example usage:
> 
> KeyStore keyStore = KeyStore.getInstance("Windows-SST");
> try (FileInputStream fis = new FileInputStream("mykeystore.sst")) {
>    keyStore.load(fis, null);
> }
> 
> Note that its not limited to file streams, it can be any stream.
> 
> The feature is behind a runtime flag ("sun.security.mscapi.keyStoreSSTSupport") as the KeyStore must have an input stream, but the JCK tests assume an input stream is optional
> 
> tier1 tests for linux/macos/Windows for x86_64

If you only do (1) without (3), user might have a false feeling that they can modify the content but persist it. Worse, because `KeyStore::store` works on an output stream, they are likely to wipe out the original SST file.

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PR Comment: https://git.openjdk.org/jdk/pull/14187#issuecomment-1568728472