Hi crypto-guys! I've just committed PDF encryption support by Patrick C. Lankswert to the redesign. The bad message is that it doesn't work yet. I get blank pages in Acrobat when enabled, although the PDF looks good when compared with one generated by the maintenance branch. I guess that's the same problem you had, Jörg? Well, and I haven't enabled encryption everywhere, yet. That shouldn't be a problem right now, because I've extended the stuff to be completely optional depending on the availability of JCE and/or cryptographic algorithms necessary. No need for java-1.3/java-1.4 directories, which is actually strange if you have JCE installed on JDK 1.3. The stuff looks out for "javax.crypto.Cipher" to be present to determine if JCE is available. A seperate check looks for the necessary algorithms (RC4 and MD5).
My stuff is configured via the FOUserAgent which can now hold a PDFEncryptionParams object containing the passwords and permissions. If is null (default) no encryption happens. I thought I just commit my stuff and we'll figure out what's wrong based on that code. Better this than nothing. I'll continue my investigations tomorrow. Maybe Patrick could have a look at the stuff. Maybe you finds something? On 09.03.2003 23:44:27 J.Pietschmann wrote: > 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? Jeremias Maerki --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
