RFR: 8365288: PEMDecoder should throw ClassCastException [v3]

[Anthony Scarpino]

On Mon, 25 Aug 2025 19:44:25 GMT, Anthony Scarpino <ascarpino at openjdk.org> wrote:

>> src/java.base/share/classes/java/security/PEMDecoder.java line 440:
>> 
>>> 438:                         .getKeySpec(key, X509EncodedKeySpec.class);
>>> 439:                 } else {
>>> 440:                     throw new IllegalArgumentException("Invalid KeySpec.");
>> 
>> Should this also be CCE?
>
> I would say no.  This checks that `tClass` is a valid class to cast to.  That should be an IAE because it's a input value.  The CCE happens when the KeyFactory rejected a valid class argument.

Turns out all the other incorrect classes return CCE, so switching this one is consistent.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26734#discussion_r2307911777