From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/75213 Path: news.gmane.org!not-for-mail From: Hans Hagen Newsgroups: gmane.comp.tex.context Subject: Re: PDF Digital Signatures Date: Mon, 19 Mar 2012 23:12:29 +0100 Message-ID: <4F67AF4D.9030709@wxs.nl> References: <1346160652.20120319102714@gmx.de> Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1332191561 4038 80.91.229.3 (19 Mar 2012 21:12:41 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Mon, 19 Mar 2012 21:12:41 +0000 (UTC) Cc: Mojca Miklavec To: mailing list for ConTeXt users Original-X-From: ntg-context-bounces@ntg.nl Mon Mar 19 22:12:40 2012 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from balder.ntg.nl ([195.12.62.10]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1S9jse-0003nC-AG for gctc-ntg-context-518@m.gmane.org; Mon, 19 Mar 2012 22:12:40 +0100 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id ED74110194; Mon, 19 Mar 2012 22:12:38 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (localhost [127.0.0.1]) (amavisd-new, port 10024) with LMTP id Pw-ocXiFcSBh; Mon, 19 Mar 2012 22:12:37 +0100 (CET) Original-Received: from [127.0.0.1] (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 8A0D5101FF; Mon, 19 Mar 2012 22:12:37 +0100 (CET) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id C2729101FF for ; Mon, 19 Mar 2012 22:12:35 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (localhost [127.0.0.1]) (amavisd-new, port 10024) with LMTP id UUajr+sFF1DN for ; Mon, 19 Mar 2012 22:12:34 +0100 (CET) Original-Received: from filter3-ams.mf.surf.net (filter3-ams.mf.surf.net [192.87.102.71]) by balder.ntg.nl (Postfix) with ESMTP id DC5E010194 for ; Mon, 19 Mar 2012 22:12:34 +0100 (CET) Original-Received: from smtp.ziggozakelijk.nl (D57D1DA2.static.ziggozakelijk.nl [213.125.29.162]) by filter3-ams.mf.surf.net (8.14.3/8.14.3/Debian-9.4) with ESMTP id q2JLCX36030661 for ; Mon, 19 Mar 2012 22:12:33 +0100 X-Default-Received-SPF: pass (skip=loggedin (res=PASS)) x-ip-name=10.100.1.101; Original-Received: from [10.100.1.101] (unverified [10.100.1.101]) by pragma-net.nl (SurgeMail 5.3h2) with ESMTP (TLS) id 113-1713362 for multiple; Mon, 19 Mar 2012 22:12:30 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 In-Reply-To: X-Authenticated-User: hagen@controller-9 X-Bayes-Prob: 0.0001 (Score 0, tokens from: @@RPTN) X-CanIt-Geo: ip=213.125.29.162; country=NL; region=03; city=Hattem; latitude=52.4667; longitude=6.0667; http://maps.google.com/maps?q=52.4667,6.0667&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 0LGLxcxJO - c2244ba71ab0 - 20120319 (trained as not-spam) X-Scanned-By: CanIt (www . roaringpenguin . com) on 192.87.102.71 X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.12 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: ntg-context-bounces@ntg.nl Errors-To: ntg-context-bounces@ntg.nl Xref: news.gmane.org gmane.comp.tex.context:75213 Archived-At: On 19-3-2012 22:08, Mojca Miklavec wrote: > On Mon, Mar 19, 2012 at 17:51, luigi scarso wrote: >> >>> I'm not sure about it, but I'm tempted to believe that digitally >>> signing PDFs might be one of "forbidden" functionality that requires >>> you to buy a licence for Acrobat. >> Why ? As long it is described in the ISO standard, it can be >> implemented in mkiv (easily is another question). > > As I said: I'm not sure whether or not it is legal to implement it or not. > > There seem to be two separate issues: > (a) creating a document that others users will be able to fill in and sign > (b) signing your own document > Martin usually knows the legal issues better. I'm not sure about the > exact legal state and I'm not sure where to check it without getting > lost in "hundreds" of pages of EULA or other documents, but (b) is > described in PDF Reference Manual > (http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/PDF32000_2008.pdf) > in Chapter 12 and cannot be any more complicated to implement than all > other PDF features that Hans, Taco or Hartmut ever implemented. sure, it's just that I never needed something like that > Out of curiosity: is inability to create password-protected PDF files > with pdfTeX/LuaTeX due to legal issues or due to nobody caring enough > to implement it? it's not worth the trouble. Afaik it's a second pass issue and would complicate the code much. Just use qpdf to do it ... pretty fast. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl ---------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________