[security-dev 01541]: Re: PING: [PATCH FOR REVIEW]: 6763530: Fix breakage of NSS-based Elliptic Curve Cryptography in OpenJDK6

[Andrew John Hughes]

2010/1/20 Tomas Gustavsson <tomas at primekey.se>:
>
> I'll second this request. This is a critical patch and many production
> installations have to live with this manually patched now.
>
> I know of no pkcs11 implementation that works with the current code.
>

It has four votes: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6763530
I don't know how many they need to wake up and review the patch.

The new release of IcedTea6 1.7 is imminent and will include the fix
so it should at least be resolved on the next version shipping with
most GNU/Linux distributions.

> Regards,
> Tomas Gustavsson
> PrimeKey Solutions AB
>
>
> On Wed, 20 Jan 2010, Michael StJohns wrote:
>
>> Hi - this seems to have stalled out again.  Any chance of revival?
>>
>> Mike
>>
>>
>> At 12:33 PM 9/24/2009, Vincent Ryan wrote:
>>>
>>> Hello Andrew,
>>>
>>> I'll need a little more time to come up to speed on this fix. I'm
>>> concerned that
>>> there may be interoperability or backwards compatibility issues.
>>>
>>>
>>>
>>> Andrew John Hughes wrote:
>>>>
>>>> 2009/9/2 Andrew John Hughes <gnu_andrew at member.fsf.org>:
>>>>>
>>>>> 2009/9/2 Michael StJohns <mstjohns at comcast.net>:
>>>>>>
>>>>>> At 09:38 PM 9/1/2009, Andrew John Hughes wrote:
>>>>>>>
>>>>>>> 2009/9/2 Michael StJohns <mstjohns at comcast.net>:
>>>>>>>>
>>>>>>>> Â This appears to be related specifically to PKCS11.Â
>>>>>>>>  Specifically, PKCS11
>>>>>>>> v2.20 has some ambiguity of the representation of an EC point (which
>>>>>>>> is
>>>>>>>> different in the text than an ASN1 ECPoint).
>>>>>>>>
>>>>>>>> This is being clarified in v2.30 with the unencoded point format
>>>>>>>> (e.g.the
>>>>>>>> format described in  X9.62, where the first octet indicates the
>>>>>>>> encoding and
>>>>>>>> there are either N or 2N octets following)Â  being the expected
>>>>>>>> value, but
>>>>>>>> with PKCS11 providers allowed - legacy - to accept either.
>>>>>>>>
>>>>>>>> One of the reasons for going that way was how the JDK PKCS11
>>>>>>>> provider had
>>>>>>>> interpreted the issue and implemented its code.
>>>>>>>>
>>>>>>>> I don't support this fix - among other things, this fix only deals
>>>>>>>> with 1/2
>>>>>>>> of the problem.  The other half is related to encoding the
>>>>>>>> value.  Also,
>>>>>>>> changing the code at decodePoint seems further into the stack than
>>>>>>>> needed
>>>>>>>> and may affect other uses of that method.
>>>>>>>>
>>>>>>> That's really too vague to be of much help in improving the patch.
>>>>>>> You seem to be saying little more than 'I don't like it'.
>>>>>>
>>>>>> Sorry about that.  My point was that your patch didn't completely
>>>>>> solve the problem and that the point at where you were fixing it could have
>>>>>> some bad side effects for anyone calling decodePoint directly.
>>>>>>
>>>>>>
>>>>>>>> There's an existing JDK bug on this coming at it from a different
>>>>>>>> direction
>>>>>>>> - 6763530 ... and there may be considerations at
>>>>>>>>
>>>>>>>> https://bugzilla.mozilla.org/show_bug.cgi?id=480280
>>>>>>>>
>>>>>>> It seems likely that's the NSS change that causes the current
>>>>>>> failure.
>>>>>>> The fix I submitted here is based on the way this is handle in NSS.
>>>>>>> In fact, the code is similar enough to suggest that one was developed
>>>>>>> from the other.
>>>>>>>>
>>>>>>>> Â that should be looked at.
>>>>>>>
>>>>>>> The JDK bug is not really 'from a different direction', it's
>>>>>>> reporting
>>>>>>> exactly the same error but from a less trivial example (I get the
>>>>>>> same
>>>>>>> failure while trying to create an example key, while this seems to
>>>>>>> require specific hardware if I'm reading it correctly).
>>>>>>
>>>>>> Not exactly.  You're using the NSS as a PKCS11 module - this problem
>>>>>> would occur with any PKCS11 module that implements EC stuff.
>>>>>>
>>>>>>
>>>>>>> Also see 6779460 which is mostly a duplicate of
>>>>>>>>
>>>>>>>> 6763530.
>>>>>>>>
>>>>>>> The patch on 6779460 seems wrong.  It means that the method will
>>>>>>> return a DER-encoded value where it would either have returned an
>>>>>>> uncompressed value before or failed.
>>>>>>
>>>>>> My point exactly as I mentioned in the comments.  :-)
>>>>>>
>>>>>>
>>>>>>>> It's probable that the fix I suggested at 6763530Â  (in comments
>>>>>>>> submitted 29
>>>>>>>> Nov 08) may be a better approach given the NSS fixes.  I believe
>>>>>>>> it will fix
>>>>>>>> the keytool problem noted in the original message.
>>>>>>>>
>>>>>>> Ok, I can see the logic in the fix and it would appear to work,
>>>>>>> though
>>>>>>> I haven't tested it.
>>>>>>> Given the patch was written nine months ago, why has it not been
>>>>>>> applied?  If it had, it would have saved me hours having to debug
>>>>>>> this
>>>>>>> same issue again.
>>>>>>
>>>>>> Yup.  I did do a search for PKCS11 related bugs when I encountered the
>>>>>> same problem and did find the original error.
>>>>>>
>>>>>>> Do you have an SCA with Sun? If so, I'll create a webrev based on
>>>>>>> your
>>>>>>> patch and we can finally get this fixed.  Without it, NSS support is
>>>>>>> completely broken in OpenJDK6 which makes me wonder why this is a low
>>>>>>> priority bug!
>>>>>>
>>>>>> I do have an SCA on file.  Note that the recommendation from the NSS
>>>>>> guys was to raise the priority.
>>>>>>
>>>>>> The reason I haven't submitted this is because I submitted a different
>>>>>> EC fix  https://bugs.openjdk.java.net/show_bug.cgi?id=100048 per the
>>>>>> documented process
>>>>>>  and was waiting on progress there before continuing.  I've got a
>>>>>> number of EC and PKCS11 related fixes I'd like to submit, but I was trying
>>>>>> for a worked example before proceeding.  And then I got busy with some other
>>>>>> things...
>>>>>>
>>>>>> Mike
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>> Mike
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> At 04:39 PM 9/1/2009, Joe Darcy wrote:
>>>>>>>>
>>>>>>>> Andrew John Hughes wrote:
>>>>>>>>
>>>>>>>> 2009/8/28 Andrew John Hughes <gnu_andrew at member.fsf.org>:
>>>>>>>>
>>>>>>>> In OpenJDK6, the elliptic curve cryptography algorithms are
>>>>>>>> available
>>>>>>>> if the PKCS11 provider is configured to point to NSS. See:
>>>>>>>>
>>>>>>>> http://blogs.sun.com/andreas/entry/the_java_pkcs_11_provider
>>>>>>>>
>>>>>>>> If NSS is configured as specified in this blog, keytool can be used
>>>>>>>> to
>>>>>>>> generate a key as follows:
>>>>>>>>
>>>>>>>> Hello.
>>>>>>>>
>>>>>>>> Allowing keytool and friends to work in more cases if the provider
>>>>>>>> is
>>>>>>>> capable seems fine to me.
>>>>>>>>
>>>>>>>> Security team, do you have concerns about this patch?
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>>
>>>>>>>> -Joe
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Andrew :-)
>>>>>>>
>>>>>>> Free Java Software Engineer
>>>>>>> Red Hat, Inc. (http://www.redhat.com)
>>>>>>>
>>>>>>> Support Free Java!
>>>>>>> Contribute to GNU Classpath and the OpenJDK
>>>>>>> http://www.gnu.org/software/classpath
>>>>>>> http://openjdk.java.net
>>>>>>>
>>>>>>> PGP Key: 94EFD9D8 (http://subkeys.pgp.net)
>>>>>>> Fingerprint: F8EF F1EA 401E 2E60 15FA  7927 142C 2591 94EF D9D8
>>>>>>
>>>>>>
>>>>> Ok here is a new webrev:
>>>>>
>>>>> http://cr.openjdk.java.net/~andrew/6763530/webrev.02/
>>>>>
>>>>> with a slightly revised version of your change (you can't throw a
>>>>> PKCS11Exception which only takes a long ID from the native code, so I
>>>>> changed this to an IllegalArgumentException).
>>>>>
>>>>> Security team, does this look ok to push?
>>>>> --
>>>>> Andrew :-)
>>>>>
>>>>> Free Java Software Engineer
>>>>> Red Hat, Inc. (http://www.redhat.com)
>>>>>
>>>>> Support Free Java!
>>>>> Contribute to GNU Classpath and the OpenJDK
>>>>> http://www.gnu.org/software/classpath
>>>>> http://openjdk.java.net
>>>>>
>>>>> PGP Key: 94EFD9D8 (http://subkeys.pgp.net)
>>>>> Fingerprint: F8EF F1EA 401E 2E60 15FA  7927 142C 2591 94EF D9D8
>>>>>
>>>>
>>>> Ping! Security developers, any thoughts on this patch:
>>>>
>>>> http://cr.openjdk.java.net/~andrew/6763530/webrev.02/
>>>>
>>>> Does it look ok to push?
>>>>
>>>> Thanks,
>>
>



-- 
Andrew :-)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

Support Free Java!
Contribute to GNU Classpath and the OpenJDK
http://www.gnu.org/software/classpath
http://openjdk.java.net

PGP Key: 94EFD9D8 (http://subkeys.pgp.net)
Fingerprint: F8EF F1EA 401E 2E60 15FA  7927 142C 2591 94EF D9D8