Re: Adding hostname verification to SSLSocket

From:
=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>
Newsgroups:
comp.lang.java.programmer
Date:
Wed, 06 Mar 2013 21:46:50 -0500
Message-ID:
<5137ff9c$0$32104$14726298@news.sunsite.dk>
On 3/2/2013 2:02 PM, Ian Pilcher wrote:

I am working with a library that can use an application-provided
SSLSocketFactory to create its SSL connections. I would like to ensure
that all of its connections enforce hostname verification, which the
default SSLSocket implementation does not do.

It's tempting to simply write an SSLSocketFactory that does the hostname
verification in its various createSocket(...) methods, but this
obviously won't cover the case where a socket is created in an
unconnected state with createSocket() and connected later. (It's also
not at all clear from the documentation that connect(...) can't be
called on a connected socket to connect it to a different server.)

So it seems that doing this the "right" way is going to require an
SSLSocket implementation -- something like this:

Any others? Anyone see any fundamental problem with this approach
(other than the fact that it's a ton of mostly boilerplate code to work
around the fact that HandshakeCompletedListener.handShakeCompleted(...)
isn't allowed to throw a checked exception)?


If you are using SSL for HTTPS, then I think that
HttpsURLConnection.setDefaultHostnameVerifier would be obvious. But
I assume that is not the case.

Arne

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