Welcome to the ad-hoc Firefox PKCS7 mimetype converter. You can upload your
PKCS7 "SPC" file from Thawte here, and have it sent back to you with a bogus extension
but with the proper MIME type: <tt>application/x-x509-user-cert</tt>.
<p><FORM enctype='multipart/form-data' name='submit-spc' method='post' action='/~davidg/spcconvert.php'>
<input type='file' name='spcdata' size=40 value=''/>
<input class='button' type='submit' name='Publish' value='Upload PKCS7 SPC File'>
</form>
<hr>
This converter does some checking on the input and will not handle files larger
than 10kByte for you.  The reasons why you need this converter can be
found on <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=399188">Bugzilla</a>.
<br>
Enjoy it! Comments to <a href="mailto:/dev/null">davidg@nikhef.nl</a>.