2 Copyright (C) 2019 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
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.
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.
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/>.
21 #ifdef DCPOMATIC_VARIANT_SWAROOP
23 #include "encrypted_ecinema_kdm.h"
24 #include "exceptions.h"
26 #include <dcp/certificate.h>
28 #include <libcxml/cxml.h>
29 #include <libxml++/libxml++.h>
30 #include <openssl/rsa.h>
31 #include <openssl/err.h>
36 using boost::shared_ptr;
37 using dcp::Certificate;
39 EncryptedECinemaKDM::EncryptedECinemaKDM (string id, string name, dcp::Key content_key, Certificate recipient)
43 RSA* rsa = recipient.public_key ();
44 _content_key = dcp::Data (RSA_size(rsa));
45 int const N = RSA_public_encrypt (content_key.length(), content_key.value(), _content_key.data().get(), rsa, RSA_PKCS1_OAEP_PADDING);
47 throw KDMError ("Could not encrypt ECinema KDM", ERR_error_string(ERR_get_error(), 0));
52 EncryptedECinemaKDM::EncryptedECinemaKDM (string xml)
54 cxml::Document doc ("ECinemaSecurityMessage");
55 doc.read_string (xml);
56 _id = doc.string_child ("Id");
57 _name = doc.string_child ("Name");
58 _content_key = dcp::Data (256);
59 int const len = dcp::base64_decode (doc.string_child("Key"), _content_key.data().get(), _content_key.size());
60 _content_key.set_size (len);
64 EncryptedECinemaKDM::as_xml () const
68 /* Lazy overallocation */
69 char out[_content_key.size() * 2];
70 Kumu::base64encode (_content_key.data().get(), _content_key.size(), out, _content_key.size() * 2);
71 int const N = strlen (out);
73 for (int i = 0; i < N; ++i) {
74 if (i > 0 && (i % 64) == 0) {
80 xmlpp::Document document;
81 xmlpp::Element* root = document.create_root_node ("ECinemaSecurityMessage");
82 root->add_child("Id")->add_child_text(_id);
83 root->add_child("Name")->add_child_text(_name);
84 root->add_child("Key")->add_child_text(lines);
85 return document.write_to_string ("UTF-8");