src/lib/screen.cc

   1 /*
   2     Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21
  22 #include "cinema.h"
  23 #include "config.h"
  24 #include "film.h"
  25 #include "kdm_util.h"
  26 #include "kdm_with_metadata.h"
  27 #include "screen.h"
  28 #include <libxml++/libxml++.h>
  29 #include <boost/algorithm/string.hpp>
  30 #include <boost/date_time/posix_time/posix_time.hpp>
  31
  32
  33 using std::list;
  34 using std::make_shared;
  35 using std::shared_ptr;
  36 using std::string;
  37 using std::vector;
  38 using boost::optional;
  39 using namespace dcpomatic;
  40
  41
  42 Screen::Screen (cxml::ConstNodePtr node)
  43         : KDMRecipient (node)
  44 {
  45         for (auto i: node->node_children ("TrustedDevice")) {
  46                 if (boost::algorithm::starts_with(i->content(), "-----BEGIN CERTIFICATE-----")) {
  47                         trusted_devices.push_back (TrustedDevice(dcp::Certificate(i->content())));
  48                 } else {
  49                         trusted_devices.push_back (TrustedDevice(i->content()));
  50                 }
  51         }
  52 }
  53
  54
  55 void
  56 Screen::as_xml (xmlpp::Element* parent) const
  57 {
  58         KDMRecipient::as_xml (parent);
  59         for (auto i: trusted_devices) {
  60                 parent->add_child("TrustedDevice")->add_child_text(i.as_string());
  61         }
  62 }
  63
  64
  65 vector<string>
  66 Screen::trusted_device_thumbprints () const
  67 {
  68         vector<string> t;
  69         for (auto i: trusted_devices) {
  70                 t.push_back (i.thumbprint());
  71         }
  72         return t;
  73 }
  74
  75
  76 KDMWithMetadataPtr
  77 kdm_for_screen (
  78         std::function<dcp::DecryptedKDM (dcp::LocalTime, dcp::LocalTime)> make_kdm,
  79         shared_ptr<const dcpomatic::Screen> screen,
  80         boost::posix_time::ptime valid_from,
  81         boost::posix_time::ptime valid_to,
  82         dcp::Formulation formulation,
  83         bool disable_forensic_marking_picture,
  84         optional<int> disable_forensic_marking_audio,
  85         vector<KDMCertificatePeriod>& period_checks
  86         )
  87 {
  88         if (!screen->recipient) {
  89                 return {};
  90         }
  91
  92         auto cinema = screen->cinema;
  93         dcp::LocalTime const begin(valid_from, dcp::UTCOffset(cinema ? cinema->utc_offset_hour() : 0, cinema ? cinema->utc_offset_minute() : 0));
  94         dcp::LocalTime const end  (valid_to,   dcp::UTCOffset(cinema ? cinema->utc_offset_hour() : 0, cinema ? cinema->utc_offset_minute() : 0));
  95
  96         period_checks.push_back(check_kdm_and_certificate_validity_periods(screen->recipient.get(), begin, end));
  97
  98         auto signer = Config::instance()->signer_chain();
  99         if (!signer->valid()) {
 100                 throw InvalidSignerError();
 101         }
 102
 103         auto kdm = make_kdm(begin, end).encrypt(
 104                 signer, screen->recipient.get(), screen->trusted_device_thumbprints(), formulation, disable_forensic_marking_picture, disable_forensic_marking_audio
 105                 );
 106
 107         dcp::NameFormat::Map name_values;
 108         if (cinema) {
 109                 name_values['c'] = cinema->name;
 110         } else {
 111                 name_values['c'] = "";
 112         }
 113         name_values['s'] = screen->name;
 114         name_values['f'] = kdm.content_title_text();
 115         name_values['b'] = begin.date() + " " + begin.time_of_day(true, false);
 116         name_values['e'] = end.date() + " " + end.time_of_day(true, false);
 117         name_values['i'] = kdm.cpl_id();
 118
 119         return make_shared<KDMWithMetadata>(name_values, cinema.get(), cinema ? cinema->emails : list<string>(), kdm);
 120 }
 121