RFR: 8264329: Z cannot be 1 for Diffie-Hellman key agreement [v2]

[Xue-Lei Andrew Fan]

> Per NIST SP 800-56A Rev 3 (section 5.7.1), the shared secret cannot be 1 or (p - 1).  This update adds this validation in the JDK provider implementation.
> 
> No new regression test, simple update and hard to construct a shared secret of 1 or (p - 1).

Xue-Lei Andrew Fan has updated the pull request incrementally with one additional commit since the last revision:

  typo correction and more

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3232/files
  - new: https://git.openjdk.java.net/jdk/pull/3232/files/7b05c3a2..0dc833ce

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3232&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3232&range=00-01

  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3232.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3232/head:pull/3232

PR: https://git.openjdk.java.net/jdk/pull/3232