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"
27 #include <dcp/certificate.h>
29 #include <libcxml/cxml.h>
30 #include <libxml++/libxml++.h>
31 #include <openssl/rsa.h>
32 #include <openssl/err.h>
37 using boost::shared_ptr;
38 using dcp::Certificate;
40 EncryptedECinemaKDM::EncryptedECinemaKDM (string id, string name, dcp::Key content_key, Certificate recipient)
44 RSA* rsa = recipient.public_key ();
45 _content_key = dcp::Data (RSA_size(rsa));
46 int const N = RSA_public_encrypt (content_key.length(), content_key.value(), _content_key.data().get(), rsa, RSA_PKCS1_OAEP_PADDING);
48 throw KDMError ("Could not encrypt ECinema KDM", ERR_error_string(ERR_get_error(), 0));
53 EncryptedECinemaKDM::EncryptedECinemaKDM (string xml)
55 cxml::Document doc ("ECinemaSecurityMessage");
56 doc.read_string (xml);
57 _id = doc.string_child ("Id");
58 _name = doc.string_child ("Name");
59 _content_key = dcp::Data (256);
60 int const len = dcp::base64_decode (doc.string_child("Key"), _content_key.data().get(), _content_key.size());
61 _content_key.set_size (len);
65 EncryptedECinemaKDM::as_xml () const
69 /* Lazy overallocation */
70 char out[_content_key.size() * 2];
71 Kumu::base64encode (_content_key.data().get(), _content_key.size(), out, _content_key.size() * 2);
72 int const N = strlen (out);
74 for (int i = 0; i < N; ++i) {
75 if (i > 0 && (i % 64) == 0) {
81 xmlpp::Document document;
82 xmlpp::Element* root = document.create_root_node ("ECinemaSecurityMessage");
83 root->add_child("Id")->add_child_text(_id);
84 root->add_child("Name")->add_child_text(_name);
85 root->add_child("Key")->add_child_text(lines);
86 return document.write_to_string ("UTF-8");
90 EncryptedECinemaKDM::as_xml (boost::filesystem::path path) const
92 FILE* f = fopen_boost (path, "w");
93 string const x = as_xml ();
94 fwrite (x.c_str(), 1, x.length(), f);