/*
- Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ This file is part of libdcp.
+
+ libdcp is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ libdcp is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
+ along with libdcp. If not, see <http://www.gnu.org/licenses/>.
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of portions of this program with the
+ OpenSSL library under certain conditions as described in each
+ individual source file, and distribute linked combinations
+ including the two.
+
+ You must obey the GNU General Public License in all respects
+ for all of the code used other than OpenSSL. If you modify
+ file(s) with this exception, you may extend this exception to your
+ version of the file(s), but you are not obligated to do so. If you
+ do not wish to do so, delete this exception statement from your
+ version. If you delete this exception statement from all source
+ files in the program, then also delete it here.
*/
-/** @file src/asset.cc
- * @brief Parent class for assets of DCPs made up of MXF files.
+
+/** @file src/mxf.cc
+ * @brief MXF class
*/
+
#include "raw_convert.h"
-#include "AS_DCP.h"
-#include "KM_prng.h"
-#include "KM_util.h"
#include "mxf.h"
#include "util.h"
#include "metadata.h"
#include "exceptions.h"
#include "dcp_assert.h"
#include "compose.hpp"
+#include <asdcp/AS_DCP.h>
+#include <asdcp/KM_prng.h>
+#include <asdcp/KM_util.h>
#include <libxml++/nodes/element.h>
#include <boost/filesystem.hpp>
#include <iostream>
+
using std::string;
+using std::cout;
using std::list;
using std::pair;
-using boost::shared_ptr;
-using boost::dynamic_pointer_cast;
+using std::shared_ptr;
+using std::dynamic_pointer_cast;
using namespace dcp;
+
MXF::MXF ()
- : _decryption_context (0)
+ : _context_id (make_uuid ())
{
-
+ /* Subclasses can create MXFs with unspecified _standard but are expected to fill
+ _standard in once the MXF is read.
+ */
}
-MXF::~MXF ()
+
+MXF::MXF (Standard standard)
+ : _context_id (make_uuid ())
+ , _standard (standard)
{
- delete _decryption_context;
+
}
+
void
-MXF::fill_writer_info (ASDCP::WriterInfo* writer_info, string id, Standard standard)
+MXF::fill_writer_info (ASDCP::WriterInfo* writer_info, string id) const
{
writer_info->ProductVersion = _metadata.product_version;
writer_info->CompanyName = _metadata.company_name;
- writer_info->ProductName = _metadata.product_name.c_str();
+ writer_info->ProductName = _metadata.product_name;
- if (standard == INTEROP) {
+ DCP_ASSERT (_standard);
+ if (_standard == Standard::INTEROP) {
writer_info->LabelSetType = ASDCP::LS_MXF_INTEROP;
} else {
writer_info->LabelSetType = ASDCP::LS_MXF_SMPTE;
Kumu::hex2bin (id.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
DCP_ASSERT (c == Kumu::UUID_Length);
+ writer_info->UsesHMAC = true;
+
if (_key_id) {
- Kumu::GenRandomUUID (writer_info->ContextID);
+ Kumu::hex2bin (_context_id.c_str(), writer_info->ContextID, Kumu::UUID_Length, &c);
writer_info->EncryptedEssence = true;
unsigned int c;
}
}
-/** Set the (private) key that will be used to encrypt or decrypt this MXF's content.
- * This is the top-secret key that is distributed (itself encrypted) to cinemas
- * via Key Delivery Messages (KDMs).
- * @param key Key to use.
- */
+
void
MXF::set_key (Key key)
{
/* No key ID so far; we now need one */
_key_id = make_uuid ();
}
-
- _decryption_context = new ASDCP::AESDecContext;
- if (ASDCP_FAILURE (_decryption_context->InitKey (_key->value ()))) {
- throw MiscError ("could not set up decryption context");
- }
}
+
string
MXF::read_writer_info (ASDCP::WriterInfo const & info)
{
char buffer[64];
- Kumu::bin2UUIDhex (info.CryptographicKeyID, ASDCP::UUIDlen, buffer, sizeof (buffer));
- _key_id = buffer;
+ if (info.EncryptedEssence) {
+ Kumu::bin2UUIDhex (info.CryptographicKeyID, ASDCP::UUIDlen, buffer, sizeof (buffer));
+ _key_id = buffer;
+ }
+
+ switch (info.LabelSetType) {
+ case ASDCP::LS_MXF_INTEROP:
+ _standard = Standard::INTEROP;
+ break;
+ case ASDCP::LS_MXF_SMPTE:
+ _standard = Standard::SMPTE;
+ break;
+ default:
+ throw ReadError ("Unrecognised label set type in MXF");
+ }
_metadata.read (info);
-
+
Kumu::bin2UUIDhex (info.AssetUUID, ASDCP::UUIDlen, buffer, sizeof (buffer));
return buffer;
}
projects / libdcp.git / blobdiff