RFR: 8258915: Temporary buffer cleanup [v8]

[Weijun Wang]

> Clean up temporary byte array, char array, and keyspec around keys and passwords.
> 
> No new regression test.

Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:

  materials

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2070/files
  - new: https://git.openjdk.java.net/jdk/pull/2070/files/b55c035d..2241bf8a

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2070&range=07
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2070&range=06-07

  Stats: 110 lines in 1 file changed: 48 ins; 31 del; 31 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2070.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2070/head:pull/2070

PR: https://git.openjdk.java.net/jdk/pull/2070