On 2/16/06, Philipp Lohmann - Sun Germany <[EMAIL PROTECTED]> wrote: > Hi, > > Pavel Vassiliev wrote: > > On 2/16/06, Philipp Lohmann - Sun Germany - ham02 - Hamburg > > > I made research of the PDF export source code and as I understood you > > just take the snapshot of the page, save it to JPEG and then write > > this page image stream into the pdf file. > > I'm not quite sure what you mean here ? Signatures need JPEG's of the > page streams ? I thought signatures would need only a digest over most > of the PDF file as detailed in PDF reference 1.5 chapter 8.7.
Yes, that's the way it should be. I just tried to understand the way you export document to PDF. > > We can create the signature right before writting the PDF trailer. > > (We'll have all PDF offsets available). > [snip] > > Or as you say we can update the PDF afterwards, but then we'll need to > > parse PDF file to get all it's offsets. > > > I saw that OO has "Digital Signatures" dialogs. I hope we can use > > them. By the way, how do you want it to work? Do you want to pick > > signers certificates in export settings, or suggest to sign the PDF if > > the OO file is already signed and take same certificates which are > > used for OO file signing? > > I'd say as a start we could use the same certificates as the original > document had. If one wants different certificates for the PDF this > should not affect the actual export code but would require additional UI > which can be added afterwards. > > Kind regards, pl > > -- > If you give someone a program, you will frustrate them for a day; > if you teach them how to program, you will frustrate them for a lifetime. > -- Author unknown > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- With best regards, Pavel Vassiliev --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
