[jdk8u-dev] RFR: 8320597: RSA signature verification fails on signed data that does not encode params correctly [v2]

[Alexey Bakhtin]

> Almost clean backport from [JDK11 PR](https://github.com/openjdk/jdk11u-dev/pull/2384)
> the only differences in the removed decodeSignature() method

Alexey Bakhtin has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/404/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/404/files/73e9909f..73e9909f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=404&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=404&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/404.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/404/head:pull/404

PR: https://git.openjdk.org/jdk8u-dev/pull/404