[Update]: JEP 249 (OCSP Stapling for TLS)

Jamil Nimeh jamil.j.nimeh at oracle.com
Wed Jul 1 02:02:15 UTC 2015



On 06/30/2015 06:04 PM, Xuelei Fan wrote:
> On 7/1/2015 6:39 AM, Jamil Nimeh wrote:
>>> src/java.base/share/classes/sun/security/ssl/HandshakeMessage.java
>>> ==================================================================
>>> line 713/714, 730/731 throws SSLHandshakeException for extension
>>> constructor in server side.  That's unlikely to happen, I think.  I was
>>> wondering, if CertificateStatus cannot be constructed, the server may
>>> not want to send the message, rather than terminate the connection
>>> immediately.
>> I think you're right.  While the exception is unlikely, I'd like to have
>> the HandshakeMessage throw the exception if something bad happens.  I do
>> however, agree that we shouldn't make it a fatal error.  I'll catch the
>> exception in ServerHandshaker, log it, and just not send the message as
>> you suggested since that is legal.  OK?
> I have not read the server side implementation.  I would like firstly
> check whether the message should be delivered, and than new the
> instance.  Exception catching is not performance friendly, and looks a
> little bit not-straightforward.  I think you may want a static method
> for the validity checking in CertificateStatus class,  instead.
As it is written today, the ServerHandshaker will only create a new 
CertificateStatus instance if the following is true:

  * Stapling has already been activated in the server (meaning that the
    client requested it and the server has the feature enabled)
  * A "get" operation was done from the StatusResponseManager and at
    least one OCSP response was returned.  In other words, if no
    responses can be brought back from the SRM, then there's no point in
    even asserting status_request[_v2] in the ServerHello.

I don't see the advantage of making a static method that does what is 
already accomplished in two lines of code in ServerHandshaker (873-4).

>
> It's OK to throw exception if something bad happens.  For easy reading,
> please have a comment that it is unlikely to happen if you keep the
> throw exception blocks.
Okay, I can definitely do that.  There are some cases where I think we 
need to throw an exception, particularly on the constructor from a 
HandshakeInStream.  That's a case where we want the client to Alert if 
the server asserts some weird/unsupported/illegal type or does something 
like type = ocsp and a zero length response (also illegal according to 
the spec).  Zero length responses are OK for ocsp_multi, though.

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