2 Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp 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 libdcp 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 libdcp. If not, see <http://www.gnu.org/licenses/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
35 /** @file src/decrypted_kdm.h
36 * @brief DecryptedKDM class
40 #ifndef LIBDCP_DECRYPTED_KDM_H
41 #define LIBDCP_DECRYPTED_KDM_H
45 #include "local_time.h"
46 #include "decrypted_kdm_key.h"
48 #include "certificate.h"
49 #include <boost/filesystem.hpp>
50 #include <boost/optional.hpp>
53 class decrypted_kdm_test;
59 class DecryptedKDMKey;
61 class CertificateChain;
66 /** @class DecryptedKDM
67 * @brief A decrypted KDM
69 * This is a KDM that has either been decrypted by a target private key, or one which
70 * has been created (by some other means) ready for encryption later.
72 * A DecryptedKDM object can be created either from an EncryptedKDM and private key file,
73 * or from the details of the assets that the KDM should protect.
78 /** @param kdm Encrypted KDM.
79 * @param private_key Private key as a PEM-format string.
81 DecryptedKDM (EncryptedKDM const & kdm, std::string private_key);
83 /** Create an empty DecryptedKDM. After creation you must call
84 * add_key() to add each key that you want in the KDM.
86 * @param not_valid_before Start time for the KDM.
87 * @param not_valid_after End time for the KDM.
90 LocalTime not_valid_before,
91 LocalTime not_valid_after,
92 std::string annotation_text,
93 std::string content_title_text,
94 std::string issue_date
97 /** Construct a DecryptedKDM containing a given set of keys.
98 * @param keys Keys to be included in the DecryptedKDM.
102 std::map<std::shared_ptr<const ReelMXF>, Key> keys,
103 LocalTime not_valid_before,
104 LocalTime not_valid_after,
105 std::string annotation_text,
106 std::string content_title_text,
107 std::string issue_date
110 /** Create a DecryptedKDM by taking a CPL and setting up to encrypt each of its
111 * assets with the same symmetric key.
113 * @param cpl CPL that the keys are for.
114 * @param key Key that was used to encrypt the assets.
115 * @param not_valid_before Start time for the KDM.
116 * @param not_valid_after End time for the KDM.
119 std::shared_ptr<const CPL> cpl,
121 LocalTime not_valid_before,
122 LocalTime not_valid_after,
123 std::string annotation_text,
124 std::string content_title_text,
125 std::string issue_date
128 /** Encrypt this KDM's keys and sign the whole KDM.
129 * @param signer Chain to sign with.
130 * @param recipient Certificate of the projector/server which should receive this KDM's keys.
131 * @param trusted_devices Thumbprints of extra trusted devices which should be written to the KDM (recipient will be written
132 * as a trusted device automatically and does not need to be included in this list).
133 * @param formulation Formulation to use for the encrypted KDM.
134 * @param disable_forensic_marking_picture true to disable forensic marking of picture.
135 * @param disable_forensic_marking_audio if not set, don't disable forensic marking of audio. If set to 0,
136 * disable all forensic marking; if set above 0, disable forensic marking above that channel.
137 * @return Encrypted KDM.
139 EncryptedKDM encrypt (
140 std::shared_ptr<const CertificateChain> signer,
141 Certificate recipient,
142 std::vector<std::string> trusted_devices,
143 Formulation formulation,
144 bool disable_forensic_marking_picture,
145 boost::optional<int> disable_forensic_marking_audio
148 /** @param type (MDIK, MDAK etc.)
149 * @param key_id Key ID
150 * @param key The actual symmetric key
151 * @param cpl_id ID of CPL that the key is for
153 void add_key (boost::optional<std::string> type, std::string key_id, Key key, std::string cpl_id, Standard standard);
155 void add_key (DecryptedKDMKey key);
157 /** @return This KDM's (decrypted) keys, which could be used to decrypt assets. */
158 std::vector<DecryptedKDMKey> keys () const {
162 boost::optional<std::string> annotation_text () const {
163 return _annotation_text;
166 std::string content_title_text () const {
167 return _content_title_text;
170 std::string issue_date () const {
176 friend class ::decrypted_kdm_test;
178 static void put_uuid (uint8_t ** d, std::string id);
179 static std::string get_uuid (unsigned char ** p);
181 LocalTime _not_valid_before;
182 LocalTime _not_valid_after;
183 boost::optional<std::string> _annotation_text;
184 std::string _content_title_text;
185 std::string _issue_date;
186 std::vector<DecryptedKDMKey> _keys;