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<p class="MsoNormal">Hin-Tak:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It is a deadline, but not the last deadline for the 4<sup>th</sup> edition. I would like to investigate this further before making any spec changes. It may be an option for us to fix mssipotf.dll, which might be a better approach than changing
the spec after over a decade.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Peter<o:p></o:p></p>
<p class="MsoNormal"><a name="_MailEndCompose"><o:p> </o:p></a></p>
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<p class="MsoNormal"><b>From:</b> mpeg-OTspec@yahoogroups.com [mailto:mpeg-OTspec@yahoogroups.com]
<b>On Behalf Of </b>Hin-Tak Leung htl10@users.sourceforge.net [mpeg-OTspec]<br>
<b>Sent:</b> Monday, January 9, 2017 1:49 PM<br>
<b>To:</b> Basit Ali <alib@microsoft.com>; Greg Hitchcock <gregh@microsoft.com>; Typography Site Comments <mstwsite@microsoft.com><br>
<b>Cc:</b> VladimirLevantovsky <vladimir.levantovsky@monotype.com>; mpeg-OTspec@yahoogroups.com; OpenType List <opentype-list@indx.co.uk>; Cosimo Lupo <cosimo.lupo@daltonmaag.com><br>
<b>Subject:</b> [mpeg-OTspec] proposing DSIG update, again.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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<p style="margin-bottom:12.0pt">Hi all,<br>
<br>
It is another deadline for RFC for OT spec 4th edition tomorrow. May I propose once again the following change be made:<br>
<br>
Referring to:<br>
<a href="http://www.microsoft.com/typography/otspec/dsig.htm">http://www.microsoft.com/typography/otspec/dsig.htm</a><br>
<br>
- Remove "4. Zero out the file checksum in the head table." and <br>
- Renumbering "5. Add the usFlag (reserved, set at 1 for now) to the stream of bytes" to 4.<br>
<br>
The reason for change is that, this is how we understand Microsoft's signing/verification module, the most widely used implementation, works.<br>
<br>
I don't know who at Microsoft is supposed to be in charge of mssipotf.dll - the font signing/verfication wintrust module.<br>
Ali seems to have access to the most current binaries, and Greg seems to be generally involved with font-related matter at the deep coding level. Could we at least identify somebody or the team at Microsoft who is "in charge of" mssipotf.dll (if there is indeed
such a party) to corroborate the suggestion above?<br>
<br>
Hin-Tak<o:p></o:p></p>
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