RFR: 8302017: Allocate BadPaddingException only if it will be thrown [v3]

[Valerie Peng]

> This change refactors the RSAPadding class to return an output record containing the status instead of relying on exception object to indicate a failure.
> 
> Thanks in advance for review~
> Valerie

Valerie Peng has updated the pull request incrementally with one additional commit since the last revision:

  Update to address review feedbacks

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14839/files
  - new: https://git.openjdk.org/jdk/pull/14839/files/cbb958d9..3426b38d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14839&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14839&range=01-02

  Stats: 53 lines in 4 files changed: 34 ins; 10 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/14839.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14839/head:pull/14839

PR: https://git.openjdk.org/jdk/pull/14839