The encryption filter uses the number and generation as part of the hash to generate the key for a given object. In short, the encryption key is different for every object and is based on the number and generation of the object. I would have preferred something simpler but the PDFXObject is not what is streamed. It was the PDFICCStream which does not have the number and generation properly set.
If someone has a suitable example with the various image formats, I will test, verify and correct an issues. Pat -----Original Message----- From: J.Pietschmann [mailto:[EMAIL PROTECTED] Sent: Sunday, March 09, 2003 5:44 PM To: [EMAIL PROTECTED] Subject: PDF Encryption in HEAD Hi all, I tried to get PDF encryption into HEAD and failed. Most of the problem is that PDFXObject no longer has a reference to the PDFDocument, where the encryption object resides in the patch. I'm not sure how important this is, the encryption filter is different from the other filters: it takes the number+generation of something, however, at some instances it takes the number+gen from the XObject, at others (ICCStream) from the stream it is applied. I have not enough knowledge of PDF encryption to sort this out. Actually, I didn't try the code from the maintentance branch with an image (hint, hint: need GIF/BMP, JPG with ICC and EPS to test. Jeremias: this appears to be your speciality...). Any hints how to proceed? J.Pietschmann --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
