"Eddy Nigg (StartCom Ltd.)" writes:
> Most likely they return a PKCS#7 (SPAC) file. The private key is 
> supposed to be stored in FF and the response file should be installed 
> without a problem. Perhaps you may want to try the free mail 
> certificates from http://cert.startcom.org and check if it works for you 
> with Firefox on Vista.

I will try that, but I predict it will fail if they use the same format.

One of my colleagues has found a recent bug in bugzilla on this
https://bugzilla.mozilla.org/show_bug.cgi?id=399188 
and  it appears that firefox is ignoring the mime type and
looking at the .spc extension, and then dropping into
Windows file management.  This is not what it does on, say, XP,
where the same transaction works fine.  I have not instrumented
XP to see if the same pkcs#7 package & mime type header get sent
by Thawte to this client (seems like a reasonable assumption, tho).

My colleague was able to create a web page that would trick
the firefox browser on Vista into downloading & installing
the cert: he took the cert out, renamed the extension to some
junk, and then had the page send the proper pkcs7 headers down
along with the cert.  Then firefox-on-vista loaded the cert
properly.

So it looks like this is some kind of error in the decisions
firefox makes about extension handling.



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