/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
* @brief Parent class for assets of DCPs made up of MXF files.
*/
-#include <iostream>
-#include <boost/filesystem.hpp>
-#include <boost/lexical_cast.hpp>
-#include <libxml++/nodes/element.h>
+#include "raw_convert.h"
#include "AS_DCP.h"
#include "KM_prng.h"
#include "KM_util.h"
#include "util.h"
#include "metadata.h"
#include "exceptions.h"
-#include "kdm.h"
+#include "dcp_assert.h"
+#include "compose.hpp"
+#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::lexical_cast;
using boost::dynamic_pointer_cast;
using namespace dcp;
-MXF::MXF (boost::filesystem::path directory, boost::filesystem::path file_name)
- : ContentAsset (directory, file_name)
- , _progress (0)
- , _encryption_context (0)
- , _decryption_context (0)
- , _interop (false)
+MXF::MXF ()
+ : _decryption_context (0)
{
}
MXF::~MXF ()
{
- delete _encryption_context;
delete _decryption_context;
}
void
-MXF::fill_writer_info (ASDCP::WriterInfo* writer_info)
+MXF::fill_writer_info (ASDCP::WriterInfo* writer_info, string id, Standard standard) const
{
writer_info->ProductVersion = _metadata.product_version;
writer_info->CompanyName = _metadata.company_name;
writer_info->ProductName = _metadata.product_name.c_str();
- if (_interop) {
+ if (standard == INTEROP) {
writer_info->LabelSetType = ASDCP::LS_MXF_INTEROP;
} else {
writer_info->LabelSetType = ASDCP::LS_MXF_SMPTE;
}
unsigned int c;
- Kumu::hex2bin (_uuid.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
- assert (c == Kumu::UUID_Length);
+ Kumu::hex2bin (id.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
+ DCP_ASSERT (c == Kumu::UUID_Length);
- if (_key) {
+ if (_key_id) {
Kumu::GenRandomUUID (writer_info->ContextID);
writer_info->EncryptedEssence = true;
unsigned int c;
- Kumu::hex2bin (_key_id.c_str(), writer_info->CryptographicKeyID, Kumu::UUID_Length, &c);
- assert (c == Kumu::UUID_Length);
- }
-}
-
-bool
-MXF::equals (shared_ptr<const ContentAsset> other, EqualityOptions opt, boost::function<void (NoteType, string)> note) const
-{
- if (!ContentAsset::equals (other, opt, note)) {
- return false;
- }
-
- shared_ptr<const MXF> other_mxf = dynamic_pointer_cast<const MXF> (other);
- if (!other_mxf) {
- note (ERROR, "comparing an MXF asset with a non-MXF asset");
- return false;
- }
-
- if (_file_name != other_mxf->_file_name) {
- note (ERROR, "MXF names differ");
- if (!opt.mxf_names_can_differ) {
- return false;
- }
- }
-
- return true;
-}
-
-void
-MXF::write_to_cpl (xmlpp::Element* node) const
-{
- pair<string, string> const attr = cpl_node_attribute ();
- xmlpp::Element* a = node->add_child (cpl_node_name ());
- if (!attr.first.empty ()) {
- a->set_attribute (attr.first, attr.second);
- }
- a->add_child ("Id")->add_child_text ("urn:uuid:" + _uuid);
- a->add_child ("AnnotationText")->add_child_text (_file_name.string ());
- a->add_child ("EditRate")->add_child_text (lexical_cast<string> (_edit_rate) + " 1");
- a->add_child ("IntrinsicDuration")->add_child_text (lexical_cast<string> (_intrinsic_duration));
- a->add_child ("EntryPoint")->add_child_text (lexical_cast<string> (_entry_point));
- a->add_child ("Duration")->add_child_text (lexical_cast<string> (_duration));
- if (!_key_id.empty ()) {
- a->add_child("KeyId")->add_child_text ("urn:uuid:" + _key_id);
+ Kumu::hex2bin (_key_id.get().c_str(), writer_info->CryptographicKeyID, Kumu::UUID_Length, &c);
+ DCP_ASSERT (c == Kumu::UUID_Length);
}
}
+/** 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)
{
_key = key;
- if (_key_id.empty ()) {
+ if (!_key_id) {
/* 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");
}
+}
- _encryption_context = new ASDCP::AESEncContext;
- if (ASDCP_FAILURE (_encryption_context->InitKey (_key->value ()))) {
- throw MiscError ("could not set up encryption context");
- }
-
- uint8_t cbc_buffer[ASDCP::CBC_BLOCK_SIZE];
-
- Kumu::FortunaRNG rng;
- if (ASDCP_FAILURE (_encryption_context->SetIVec (rng.FillRandom (cbc_buffer, ASDCP::CBC_BLOCK_SIZE)))) {
- throw MiscError ("could not set up CBC initialization vector");
+string
+MXF::read_writer_info (ASDCP::WriterInfo const & info)
+{
+ char buffer[64];
+
+ if (info.EncryptedEssence) {
+ Kumu::bin2UUIDhex (info.CryptographicKeyID, ASDCP::UUIDlen, buffer, sizeof (buffer));
+ _key_id = buffer;
}
+
+ _metadata.read (info);
+
+ Kumu::bin2UUIDhex (info.AssetUUID, ASDCP::UUIDlen, buffer, sizeof (buffer));
+ return buffer;
}
projects / libdcp.git / blobdiff