2 Copyright (C) 2012-2014 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.
34 /** @file src/asset.cc
35 * @brief Parent class for assets of DCPs made up of MXF files.
38 #include "raw_convert.h"
42 #include "exceptions.h"
43 #include "dcp_assert.h"
44 #include "compose.hpp"
45 #include <asdcp/AS_DCP.h>
46 #include <asdcp/KM_prng.h>
47 #include <asdcp/KM_util.h>
48 #include <libxml++/nodes/element.h>
49 #include <boost/filesystem.hpp>
56 using boost::shared_ptr;
57 using boost::dynamic_pointer_cast;
61 MXF::fill_writer_info (ASDCP::WriterInfo* writer_info, string id, Standard standard) const
63 writer_info->ProductVersion = _metadata.product_version;
64 writer_info->CompanyName = _metadata.company_name;
65 writer_info->ProductName = _metadata.product_name.c_str();
67 if (standard == INTEROP) {
68 writer_info->LabelSetType = ASDCP::LS_MXF_INTEROP;
70 writer_info->LabelSetType = ASDCP::LS_MXF_SMPTE;
73 Kumu::hex2bin (id.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
74 DCP_ASSERT (c == Kumu::UUID_Length);
76 writer_info->UsesHMAC = true;
79 Kumu::GenRandomUUID (writer_info->ContextID);
80 writer_info->EncryptedEssence = true;
83 Kumu::hex2bin (_key_id.get().c_str(), writer_info->CryptographicKeyID, Kumu::UUID_Length, &c);
84 DCP_ASSERT (c == Kumu::UUID_Length);
88 /** Set the (private) key that will be used to encrypt or decrypt this MXF's content.
89 * This is the top-secret key that is distributed (itself encrypted) to cinemas
90 * via Key Delivery Messages (KDMs).
91 * @param key Key to use.
94 MXF::set_key (Key key)
99 /* No key ID so far; we now need one */
100 _key_id = make_uuid ();
105 MXF::read_writer_info (ASDCP::WriterInfo const & info)
109 if (info.EncryptedEssence) {
110 Kumu::bin2UUIDhex (info.CryptographicKeyID, ASDCP::UUIDlen, buffer, sizeof (buffer));
114 _metadata.read (info);
116 Kumu::bin2UUIDhex (info.AssetUUID, ASDCP::UUIDlen, buffer, sizeof (buffer));