[7u4] Request for approval for CR 6879539: enable empty password support for pkcs12 keystore

[Weijun Wang]

Hi All

This is a request to backport a jdk8 fix into jdk7u4.

    CR: 6879539: enable empty password support for pkcs12 keystore
    Weblink: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6879539

Description:

The keystore type pkcs12 does not support pkcs12 files protected with an 
empty password.

The fix is already included in jdk8 as:

    http://hg.openjdk.java.net/jdk8/tl/jdk/rev/bdd1dd1e1462

    6879539: enable empty password support for pkcs12 keystore
    Reviewed-by: vinnie, weijun
    Contributed-by: Florian Weimer <fweimer at bfk.de>

Florian has already signed OCA.

The code change for jdk7u4 is identical to the one in jdk8.

I intend to push it to

    ssh://hg.openjdk.java.net/jdk7u/jdk7u-dev-gate/jdk

Thanks
Weijun