RFR 8242068: Signed JAR support for RSASSA-PSS and EdDSA

[Weijun Wang]

Please take a review at

      CSR : https://bugs.openjdk.java.net/browse/JDK-8245274
   webrev : http://cr.openjdk.java.net/~weijun/8242068/webrev.00/

Major points in CSR:

- new sigalg "RSASSA-PSS", "EdDSA", "Ed25519" and "Ed448" can be used in jarsigner

- The ".RSA" and ".EC" block extension types (PKCS #7 SignedData inside a signed JAR) are reused for new signature algorithms

major code changes:

- Move signature related utilities methods from AlgorithmId.java to SignatureUtil.java

- Add new SignatureUtil methods fromKey() and fromSignature() to simplify creating Signature and getting its AlgorithmId

- Use the new methods in PKCS10, X509CertImpl, and X509CRLImpl signing

- Add a new (and intuitive, IMHO) PKCS7::generateNewSignedData capable of all old and new signature algorithms

- Mark all -altsign related code deprecated and they can be removed once ContentSigner is removed

Next I'll do some basic interop tests with openssl and BouncyCastle.

Thanks,
Max