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Re: [Cfrg] [saag] Further MD5 breaks: Creating a rogue CAcertificate

2008-12-31 13:01:30

I sent my last message a bit too hastily.  Other ideas that I was
contemplating should have been mentioned including:

  - remove any unrecognized extensions
  - remove tumors

Those could potentially cause problems if for some reason they were
actually needed.  This one, though, shouldn't cause trouble:

  - add a private EKU with a random number (or two) in the OID

That would not mess up the serial number scheme in use or modify the
subject name as has been suggested.


I wrote:
There is a simple fix -- a CA can just reorder the extensions prior
to issuing a certificate.


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