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"
47 #include <asdcp/AS_DCP.h>
55 using std::shared_ptr;
57 using boost::optional;
63 cerr << "Re-write a MXF (decrypting it if required)\n"
64 << "Syntax: " << n << " [OPTION] <MXF>]\n"
65 << " --version show libdcp version\n"
66 << " -v, --verbose be verbose\n"
67 << " -h, --help show this help\n"
68 << " -o, --output output filename\n"
69 << " -k, --kdm KDM file\n"
70 << " -p, --private-key private key file\n"
71 << " -t, --type MXF type: picture or atmos\n"
72 << " -i, --ignore-hmac don't raise an error if HMACs don't agree\n";
75 template <class T, class U>
76 void copy (T const& in, shared_ptr<U> writer, bool ignore_hmac)
78 auto reader = in.start_read();
79 reader->set_check_hmac (!ignore_hmac);
80 for (int64_t i = 0; i < in.intrinsic_duration(); ++i) {
81 auto frame = reader->get_frame (i);
82 writer->write (frame->data(), frame->size());
89 main (int argc, char* argv[])
94 optional<boost::filesystem::path> output_file;
95 optional<boost::filesystem::path> kdm_file;
96 optional<boost::filesystem::path> private_key_file;
97 bool ignore_hmac = false;
106 int option_index = 0;
108 struct option long_options[] = {
109 { "version", no_argument, 0, 'A' },
110 { "verbose", no_argument, 0, 'v' },
111 { "help", no_argument, 0, 'h' },
112 { "output", required_argument, 0, 'o'},
113 { "kdm", required_argument, 0, 'k'},
114 { "private-key", required_argument, 0, 'p'},
115 { "type", required_argument, 0, 't' },
116 { "ignore-hmac", no_argument, 0, 'i' },
120 int c = getopt_long (argc, argv, "Avho:k:p:t:i", long_options, &option_index);
128 cout << "libdcp version " << LIBDCP_VERSION << "\n";
137 output_file = optarg;
143 private_key_file = optarg;
146 if (strcmp(optarg, "picture") == 0) {
147 type = Type::PICTURE;
148 } else if (strcmp(optarg, "atmos") == 0) {
151 cerr << "Unknown MXF type " << optarg << "\n";
161 if (optind >= argc) {
166 boost::filesystem::path input_file = argv[optind];
169 cerr << "You must specify -o or --output\n";
174 cerr << "You must specify -k or --kdm\n";
178 if (!private_key_file) {
179 cerr << "You must specify -p or --private-key\n";
184 cerr << "You must specify -t or --type\n";
188 dcp::EncryptedKDM encrypted_kdm (dcp::file_to_string (kdm_file.get ()));
189 dcp::DecryptedKDM decrypted_kdm (encrypted_kdm, dcp::file_to_string (private_key_file.get()));
191 auto add_key = [verbose](dcp::MXF& mxf, dcp::DecryptedKDM const& kdm) {
192 auto key_id = mxf.key_id();
195 cout << "Asset is encrypted.\n";
197 auto keys = kdm.keys();
198 auto key = std::find_if (keys.begin(), keys.end(), [key_id](dcp::DecryptedKDMKey const& k) { return k.id() == *key_id; });
199 if (key == keys.end()) {
200 cout << "No key found in KDM.\n";
204 cout << "Key found in KDM.\n";
206 mxf.set_key (key->key());
214 dcp::AtmosAsset in (input_file);
215 add_key (in, decrypted_kdm);
216 dcp::AtmosAsset out (
219 in.max_channel_count(),
220 in.max_object_count(),
223 auto writer = out.start_write (output_file.get());
224 copy (in, writer, ignore_hmac);
229 dcp::MonoPictureAsset in (input_file);
230 add_key (in, decrypted_kdm);
231 dcp::MonoPictureAsset out (in.edit_rate(), dcp::Standard::SMPTE);
232 auto writer = out.start_write (output_file.get(), false);
233 copy (in, writer, ignore_hmac);
237 } catch (dcp::ReadError& e) {
238 cerr << "Read error: " << e.what() << "\n";