RFR: 8023980: JCE doesn't provide any class to handle RSA private key in PKCS#1 [v3]

[Valerie Peng]

> Can someone help review this?
> 
> This change enhances RSA KeyFactory impl of SunRsaSign and SunPKCS11 providers to accept RSA keys in PKCS#1 format and encoding and translate them to provider-specific RSA keys. Updated the relevant tests with a sample PKCS#1 encoded key pair.
> 
> Thanks,
> Valerie

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

  Update copyright year from 2020 to 2021.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1787/files
  - new: https://git.openjdk.java.net/jdk/pull/1787/files/a4cddf47..b48afddd

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1787&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1787&range=01-02

  Stats: 6 lines in 6 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1787.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1787/head:pull/1787

PR: https://git.openjdk.java.net/jdk/pull/1787