[xmlsec] Verify signature after certificate expired

Aleksey Sanin aleksey at aleksey.com
Thu Oct 10 15:36:58 PDT 2002

Igor made changes in the Win32 build and forgot that not everyone uses
Microsoft .Net Visual Studio :) MS VC 6.0 has no __FUNCTION__ and
this caused problems. I guess the correct path is:

! #if !defined(__GNUC__) && !defined(_MSC_VER)
! #if !defined(__GNUC__) && (!defined(_MSC_VER) || (_MSC_VER < 1300))

What do you think, Igor?


Moultrie, Ferrell (ISSAtlanta) wrote:

>  Thanks for making these changes. I've pushed aside what I was working
>on in my application so that I can work with this change. I pulled the
>XMLSec tips with your changes from CVS and built it on Win32. With one
>minor problem it builds and runs without any regression errors. I
>haven't yet tried the new function bit but that is next. As for the one
>build problem I had, I don't really understand the change you made but
>if I put it back like it was before, everything is fine. Here's the
>diff -b backup/errors.h errors.h
>< #if !defined(__GNUC__) && !defined(_MSC_VER)
>>#if !defined(__GNUC__)
>Without removing the !defined(_MSC_VER) and allowing the following line
>#define __FUNCTION__
>... to be compiled, I get zillions of errors complaining about
>__FUNCTION__ being undefined.
>If this isn't the correct change, please let me know what I'm missing
>and I'll try that instead. More on the cert verification as soon as I
>can figure out your example and make the appropriate changes in my code
>to do something similar.
>  Ferrell
>-----Original Message-----
>From: Aleksey Sanin [mailto:aleksey at aleksey.com] 
>Sent: Thursday, October 10, 2002 3:53 AM
>To: Moultrie, Ferrell (ISSAtlanta)
>Cc: xmlsec at aleksey.com
>Subject: Re: [xmlsec] Verify signature after certificate expired
>I understand the problem with using 0.9.7 and I am waiting for it
>for a very long time myself :) I've changed XMLSec library so now
>this "expired certs feature" is supported for both 0.9.6 and 0.9.7.
>Also I added a test case to my suite to test it. The code is not
>complicated but it's new code and I would appreciate if you will
>try this new feature in your environment. I would be glad to help
>you and fix any bugs you find. The fixed XMLSec version should
>be in tonight's snapshot or you can get it from GNOME CVS.
>Thank you in advance,
>Moultrie, Ferrell (ISSAtlanta) wrote:
>> I *must* have this stuff -- there's not really another way to do this
>>without using a never-expiring cert from a private CA -- and that has
>>it's own set of risks and hazards that are commisurate with, or greater
>>than, the risk you point out of not expiring a signature after it's
>>released. For a code and/or data signing application intended *only* to
>>say that the data was valid at the time it was signed -- and should
>>remain valid forever -- not having a signature expire is the
>>proper/desired/required behavior. 
>>For your notes below:
>> (1) My XML has a timestamp in a predictable format that correspond
>>precisely to the time of signing so this isn't an issue in my case. Not
>>a problem.
>> (2) Yucky because this is extra work in the application which I was
>>avoiding -- but that's still not a big problem since verification setup
>>time isn't absolutely critical to my application.
>> (3) I believe I understand your POV and the tradeoffs -- they just
>>don't change how my application *must* behave.
>> If you can either prototype the required code for 0.9.6g or give me
>>good a pointer as you can to what should be done and where, I'll check
>>it out and test it with my application. I'm very appreciative of what
>>you've done so far -- but I just can't use 0.9.7 in our general-release
>>applications at this time. Too much testing -- too many unknowns -- too
>>hard to explain if it turns out to have a critical security
>>issue/bug/etc. Thanks again for whatever you can do to help me move
>>forward. Finding out about this today is painful/inconvenient -- but
>>much better than finding out about it next year when all our
>>applications suddenly shut down. Hopefully QA would have found this
>>(I just turned the X509 stuff over to them) but if we'd missed it, it
>>would have been very painful. 

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