Hi,

here is the next patch for brainpool curve support in SunEC.

Differences from the first patch:

* Brainpool curves with less than 256 bits are removed. Subsequently, the curve 
oid check is made more robust to avoid null
pointer caused Segmentation Faults in memcmp calls.

* Bug JDK-8189594 is fixed.

* Known answer tests for each new curve are added to 
sun.security.pkcs11.ec.TestECDH. The tests are only executed, if the
tested provider's name is "SunEC" and the tested provider claims to support the 
respective curve. For SunEC, these tests are
executed during sun.security.ec.TestEC.

I decided to add these test vectors to TestECDH to avoid code duplications, as 
TestECDH is describes exactly the test
for that kind of test vectors.
The superclass to TestECDH, TestPKCS11, is also adapted to provide a method to 
check, whether one particular curve is
supported.

While the test vectors for the 256, 384 and 512 bit curve are taken from [1], 
the test vector for brainpoolP320r1 comes from [2].
The latter one is a draft version of RFC 6954.

Regards,
Tobias

[1] https://tools.ietf.org/html/rfc7027#appendix-A
[2] https://tools.ietf.org/html/draft-merkle-ikev2-ke-brainpool-00#appendix-A.5


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