Name Constraints, was Re: [caops-wg] Re: ca signing policy file

[Frank Siebenlist]

Hi Mike,

I don't know if it works correctly or not, but the openssl change log shows:

http://www.openssl.org/news/changelog.html
...
Changes between 0.9.7h and 0.9.8  [05 Jul 2005]
...
  *) Support for nameConstraints certificate extension.
     [Steve Henson]
...

Did anyone test this?

-Frank.




Mike Helm wrote:

>David Chadwick writes:
>  
>
>>Can anyone give me evidence of support or non-support of commercial CAs 
>>for the name constraints extension?
>>    
>>
>
>Well, in the recent past, no commercial client software supported 
>name constraints, so whether commercial CAs supported them or not
>was a moot point.  Well worse than that, since it's a critical
>extension.  Your CA would be useless.
>
>openssl doesn't support it, so that makes use of name constraints
>in the web &c world pretty much impossible.  I am not sure whether
>recent Windows products can; it would make sense that they do,
>because of cross-signing support, but I don't know.
>
>  
>

-- 
Frank Siebenlist               franks at mcs.anl.gov
The Globus Alliance - Argonne National Laboratory