2 Copyright (C) 2016-2021 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 #include "atmos_asset.h"
36 #include "atmos_asset_reader.h"
37 #include "atmos_asset_writer.h"
38 #include "atmos_frame.h"
39 #include "crypto_context.h"
40 #include "decrypted_kdm.h"
41 #include "encrypted_kdm.h"
42 #include "exceptions.h"
44 #include "mono_picture_asset.h"
45 #include "mono_picture_asset_writer.h"
48 #include <asdcp/AS_DCP.h>
56 using std::shared_ptr;
58 using boost::optional;
64 cerr << "Re-write a MXF (decrypting it if required)\n"
65 << "Syntax: " << n << " [OPTION] <MXF>]\n"
66 << " --version show libdcp version\n"
67 << " -v, --verbose be verbose\n"
68 << " -h, --help show this help\n"
69 << " -o, --output output filename\n"
70 << " -k, --kdm KDM file\n"
71 << " -p, --private-key private key file\n"
72 << " -t, --type MXF type: picture or atmos\n"
73 << " -i, --ignore-hmac don't raise an error if HMACs don't agree\n";
76 template <class T, class U>
77 void copy (T const& in, shared_ptr<U> writer, bool ignore_hmac)
79 auto reader = in.start_read();
80 reader->set_check_hmac (!ignore_hmac);
81 for (int64_t i = 0; i < in.intrinsic_duration(); ++i) {
82 auto frame = reader->get_frame (i);
83 writer->write (frame->data(), frame->size());
90 main (int argc, char* argv[])
95 optional<boost::filesystem::path> output_file;
96 optional<boost::filesystem::path> kdm_file;
97 optional<boost::filesystem::path> private_key_file;
98 bool ignore_hmac = false;
107 int option_index = 0;
109 struct option long_options[] = {
110 { "version", no_argument, 0, 'A' },
111 { "verbose", no_argument, 0, 'v' },
112 { "help", no_argument, 0, 'h' },
113 { "output", required_argument, 0, 'o'},
114 { "kdm", required_argument, 0, 'k'},
115 { "private-key", required_argument, 0, 'p'},
116 { "type", required_argument, 0, 't' },
117 { "ignore-hmac", no_argument, 0, 'i' },
121 int c = getopt_long (argc, argv, "Avho:k:p:t:i", long_options, &option_index);
129 cout << "libdcp version " << dcp::version << "\n";
138 output_file = optarg;
144 private_key_file = optarg;
147 if (strcmp(optarg, "picture") == 0) {
148 type = Type::PICTURE;
149 } else if (strcmp(optarg, "atmos") == 0) {
152 cerr << "Unknown MXF type " << optarg << "\n";
162 if (optind >= argc) {
167 boost::filesystem::path input_file = argv[optind];
170 cerr << "You must specify -o or --output\n";
175 cerr << "You must specify -k or --kdm\n";
179 if (!private_key_file) {
180 cerr << "You must specify -p or --private-key\n";
185 cerr << "You must specify -t or --type\n";
189 dcp::EncryptedKDM encrypted_kdm (dcp::file_to_string (kdm_file.get ()));
190 dcp::DecryptedKDM decrypted_kdm (encrypted_kdm, dcp::file_to_string (private_key_file.get()));
192 auto add_key = [verbose](dcp::MXF& mxf, dcp::DecryptedKDM const& kdm) {
193 auto key_id = mxf.key_id();
196 cout << "Asset is encrypted.\n";
198 auto keys = kdm.keys();
199 auto key = std::find_if (keys.begin(), keys.end(), [key_id](dcp::DecryptedKDMKey const& k) { return k.id() == *key_id; });
200 if (key == keys.end()) {
201 cout << "No key found in KDM.\n";
205 cout << "Key found in KDM.\n";
207 mxf.set_key (key->key());
215 dcp::AtmosAsset in (input_file);
216 add_key (in, decrypted_kdm);
217 dcp::AtmosAsset out (
220 in.max_channel_count(),
221 in.max_object_count(),
224 auto writer = out.start_write (output_file.get());
225 copy (in, writer, ignore_hmac);
230 dcp::MonoPictureAsset in (input_file);
231 add_key (in, decrypted_kdm);
232 dcp::MonoPictureAsset out (in.edit_rate(), dcp::Standard::SMPTE);
233 auto writer = out.start_write (output_file.get(), false);
234 copy (in, writer, ignore_hmac);
238 } catch (dcp::ReadError& e) {
239 cerr << "Read error: " << e.what() << "\n";