X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Fmxf_asset.cc;h=bcfe60854500fe731c2f67acac54e23f543bc37b;hb=30e2f6f873002d16aeae707879ea15c1c63a4323;hp=9b491dd735fe9d94b042a99a29ac1a1a96507d5d;hpb=034abb6bb0f1d0382620bdcc43501ce0ba30b03a;p=libdcp.git

diff --git a/src/mxf_asset.cc b/src/mxf_asset.cc
index 9b491dd7..bcfe6085 100644
--- a/src/mxf_asset.cc
+++ b/src/mxf_asset.cc
@@ -24,55 +24,82 @@
 #include <iostream>
 #include <fstream>
 #include <boost/filesystem.hpp>
+#include <boost/lexical_cast.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"
 
 using std::string;
 using std::list;
+using std::pair;
 using boost::shared_ptr;
+using boost::lexical_cast;
 using boost::dynamic_pointer_cast;
 using namespace libdcp;
 
 MXFAsset::MXFAsset (string directory, string 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)
 {
 
 }
 
-MXFAsset::MXFAsset (string directory, string file_name, boost::signals2::signal<void (float)>* progress, int edit_rate, int intrinsic_duration)
-	: Asset (directory, file_name)
+MXFAsset::MXFAsset (string directory, string file_name, boost::signals2::signal<void (float)>* progress, int edit_rate, int intrinsic_duration) 
+	: Asset (directory, file_name, edit_rate, intrinsic_duration)
 	, _progress (progress)
-	, _edit_rate (edit_rate)
-	, _entry_point (0)
-	, _intrinsic_duration (intrinsic_duration)
-	, _duration (intrinsic_duration)
+	, _encryption_context (0)
+	, _decryption_context (0)
 {
 	
 }
+
+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, string uuid, bool interop, MXFMetadata const & metadata)
 {
-	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);
 	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, boost::function<void (NoteType, string)> note) const
+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");
@@ -81,23 +108,65 @@ MXFAsset::equals (shared_ptr<const Asset> other, EqualityOptions, boost::functio
 	
 	if (_file_name != other_mxf->_file_name) {
 		note (ERROR, "MXF names differ");
-		return false;
+		if (!opt.mxf_names_can_differ) {
+			return false;
+		}
 	}
+	
+	return true;
+}
 
-	if (_edit_rate != other_mxf->_edit_rate) {
-		note (ERROR, "MXF edit rates differ");
-		return false;
+void
+MXFAsset::add_typed_key_id (xmlpp::Element* parent) const
+{
+	xmlpp::Element* typed_key_id = parent->add_child("TypedKeyId");
+	typed_key_id->add_child("KeyType")->add_child_text(key_type ());
+	typed_key_id->add_child("KeyId")->add_child_text("urn:uuid:" + _key_id);
+}
+
+void
+MXFAsset::write_to_cpl (xmlpp::Element* node, bool interop) const
+{
+	pair<string, string> const attr = cpl_node_attribute (interop);
+	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);
+	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);
+	}
+}
+
+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");
+	}
 }