X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Fmxf_asset.cc;h=28ac1933371cf8cfe8b0862230ae48acbade168c;hb=0ad84c854da64d0710f06307f63d8b70ac59b681;hp=144532f88afaac86dde35a5cfd21e00f2989804b;hpb=2ad4929f4b3fec0413633c00364f4a6fda3e6c0c;p=libdcp.git

diff --git a/src/mxf_asset.cc b/src/mxf_asset.cc
index 144532f8..28ac1933 100644
--- a/src/mxf_asset.cc
+++ b/src/mxf_asset.cc
@@ -22,57 +22,74 @@
  */
 
 #include <iostream>
-#include <fstream>
 #include <boost/filesystem.hpp>
+#include <libxml++/nodes/element.h>
 #include "AS_DCP.h"
+#include "KM_prng.h"
 #include "KM_util.h"
 #include "mxf_asset.h"
 #include "util.h"
 #include "metadata.h"
+#include "exceptions.h"
+#include "kdm.h"
+#include "raw_convert.h"
 
 using std::string;
 using std::list;
+using std::pair;
 using boost::shared_ptr;
 using boost::dynamic_pointer_cast;
 using namespace libdcp;
 
-MXFAsset::MXFAsset (string directory, string file_name)
+MXFAsset::MXFAsset (boost::filesystem::path directory, boost::filesystem::path file_name)
 	: Asset (directory, file_name)
 	, _progress (0)
-	, _edit_rate (0)
-	, _entry_point (0)
-	, _intrinsic_duration (0)
-	, _duration (0)
+	, _encryption_context (0)
+	, _decryption_context (0)
+	, _interop (false)
 {
 
 }
 
-MXFAsset::MXFAsset (string directory, string file_name, boost::signals2::signal<void (float)>* progress, int edit_rate, int intrinsic_duration)
-	: Asset (directory, file_name)
-	, _progress (progress)
-	, _edit_rate (edit_rate)
-	, _entry_point (0)
-	, _intrinsic_duration (intrinsic_duration)
-	, _duration (intrinsic_duration)
+MXFAsset::~MXFAsset ()
 {
-	
+	delete _encryption_context;
+	delete _decryption_context;
 }
+
 void
-MXFAsset::fill_writer_info (ASDCP::WriterInfo* writer_info, string uuid)
+MXFAsset::fill_writer_info (ASDCP::WriterInfo* writer_info)
 {
-	writer_info->ProductVersion = Metadata::instance()->product_version;
-	writer_info->CompanyName = Metadata::instance()->company_name;
-	writer_info->ProductName = Metadata::instance()->product_name.c_str();
+	writer_info->ProductVersion = _metadata.product_version;
+	writer_info->CompanyName = _metadata.company_name;
+	writer_info->ProductName = _metadata.product_name.c_str();
 
-	writer_info->LabelSetType = ASDCP::LS_MXF_SMPTE;
+	if (_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);
+	Kumu::hex2bin (_uuid.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
 	assert (c == Kumu::UUID_Length);
+
+	if (_key) {
+		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
 MXFAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, boost::function<void (NoteType, string)> note) const
 {
+	if (!Asset::equals (other, opt, note)) {
+		return false;
+	}
+	
 	shared_ptr<const MXFAsset> other_mxf = dynamic_pointer_cast<const MXFAsset> (other);
 	if (!other_mxf) {
 		note (ERROR, "comparing an MXF asset with a non-MXF asset");
@@ -85,21 +102,54 @@ MXFAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, boost::fun
 			return false;
 		}
 	}
+	
+	return true;
+}
 
-	if (_edit_rate != other_mxf->_edit_rate) {
-		note (ERROR, "MXF edit rates differ");
-		return false;
+void
+MXFAsset::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 (raw_convert<string> (_edit_rate) + " 1");
+	a->add_child ("IntrinsicDuration")->add_child_text (raw_convert<string> (_intrinsic_duration));
+	a->add_child ("EntryPoint")->add_child_text (raw_convert<string> (_entry_point));
+	a->add_child ("Duration")->add_child_text (raw_convert<string> (_duration));
+	if (!_key_id.empty ()) {
+		a->add_child("KeyId")->add_child_text ("urn:uuid:" + _key_id);
+	}
+	a->add_child ("Hash")->add_child_text (digest ());
+}
+
+void
+MXFAsset::set_key (Key key)
+{
+	_key = key;
+
+	if (_key_id.empty ()) {
+		/* No key ID so far; we now need one */
+		_key_id = make_uuid ();
 	}
 	
-	if (_intrinsic_duration != other_mxf->_intrinsic_duration) {
-		note (ERROR, "MXF intrinsic durations differ");
-		return false;
+	_decryption_context = new ASDCP::AESDecContext;
+	if (ASDCP_FAILURE (_decryption_context->InitKey (_key->value ()))) {
+		throw MiscError ("could not set up decryption context");
 	}
 
-	if (_duration != other_mxf->_duration) {
-		note (ERROR, "MXF durations differ");
-		return false;
+	_encryption_context = new ASDCP::AESEncContext;
+	if (ASDCP_FAILURE (_encryption_context->InitKey (_key->value ()))) {
+		throw MiscError ("could not set up encryption context");
 	}
 	
-	return true;
+	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");
+	}
 }