[7u] Request for approval for CR 8012082: SASL: auth-conf negotiated, but unencrypted data is accepted, reset to unencrypt

[Weijun Wang]

Hi All

This is a request to backport a jdk8 fix into jdk7u-dev.

8012082: SASL: auth-conf negotiated, but unencrypted data is accepted, 
reset to unencrypt

    http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8012082

The qop (quality of protection) value is shared between wrap and unwrap, 
so the protection level of an incoming message will be used as the one 
of an outgoing message. The result is something like "if you don't care 
neither do I", but actually it should be "I care no matter what you do".

The fix is already included in jdk8 as:

    http://hg.openjdk.java.net/jdk8/tl/jdk/rev/ae4a82e69da2
    Reviewed-by: vinnie

The patch for jdk7u-dev is identical to the one in jdk8.

The fix is low-risk, and isolated. new regression test added. Existing 
tests also run fine.

Thanks
Weijun