RFR 8178370 : [TEST_BUG] java/security/Signature/SignatureLength.java fails

[Ivan Gerasimov]

Hello!

The regression test SignatureLength.java was seen to fail on some 
Solaris systems.

This is because signature verifier from SunPKCS11-Solaris provider 
doesn't always throw SignatureException when the signature is of wrong 
length, but can simply return false to indicate it is invalid.

The test was also modified to try different combinations of providers 
used to create key-pair generator, signer and verifier.

The fixed test passes well on all platforms with JDK 11 and JDK 8u.

Would you please help review it?

BUGURL: https://bugs.openjdk.java.net/browse/JDK-8178370
WEBREV: http://cr.openjdk.java.net/~igerasim/8178370/00/webrev/

Thanks in advance!

-- 
With kind regards,
Ivan Gerasimov