+// Write one or more plaintext Aux Data (ST 429-14) bytestreams to a plaintext ASDCP file
+// Write one or more plaintext Aux Data (ST 429-14) bytestreams to a ciphertext ASDCP file
+//
+Result_t
+write_aux_data_file(CommandOptions& Options)
+{
+ AESEncContext* Context = 0;
+ HMACContext* HMAC = 0;
+ DCData::MXFWriter Writer;
+ DCData::FrameBuffer FrameBuffer(Options.fb_size);
+ DCData::DCDataDescriptor DDesc;
+ DCData::SequenceParser Parser;
+ byte_t IV_buf[CBC_BLOCK_SIZE];
+ Kumu::FortunaRNG RNG;
+
+ // set up essence parser
+ Result_t result = Parser.OpenRead(Options.filenames.front());
+
+ // set up MXF writer
+ if ( ASDCP_SUCCESS(result) )
+ {
+ Parser.FillDCDataDescriptor(DDesc);
+ memcpy(DDesc.DataEssenceCoding, Options.aux_data_coding.Value(), Options.aux_data_coding.Size());
+ DDesc.EditRate = Options.PictureRate();
+
+ if ( Options.verbose_flag )
+ {
+ fprintf(stderr, "Aux Data\n");
+ fprintf(stderr, "Frame Buffer size: %u\n", Options.fb_size);
+ DCData::DCDataDescriptorDump(DDesc);
+ }
+ }
+
+ if ( ASDCP_SUCCESS(result) && ! Options.no_write_flag )
+ {
+ WriterInfo Info = s_MyInfo; // fill in your favorite identifiers here
+ if ( Options.asset_id_flag )
+ memcpy(Info.AssetUUID, Options.asset_id_value, UUIDlen);
+ else
+ Kumu::GenRandomUUID(Info.AssetUUID);
+
+ Info.LabelSetType = LS_MXF_SMPTE;
+
+ // configure encryption
+ if( Options.key_flag )
+ {
+ Kumu::GenRandomUUID(Info.ContextID);
+ Info.EncryptedEssence = true;
+
+ if ( Options.key_id_flag )
+ {
+ memcpy(Info.CryptographicKeyID, Options.key_id_value, UUIDlen);
+ }
+ else
+ {
+ create_random_uuid(Info.CryptographicKeyID);
+ }
+
+ Context = new AESEncContext;
+ result = Context->InitKey(Options.key_value);
+
+ if ( ASDCP_SUCCESS(result) )
+ result = Context->SetIVec(RNG.FillRandom(IV_buf, CBC_BLOCK_SIZE));
+
+ if ( ASDCP_SUCCESS(result) && Options.write_hmac )
+ {
+ Info.UsesHMAC = true;
+ HMAC = new HMACContext;
+ result = HMAC->InitKey(Options.key_value, Info.LabelSetType);
+ }
+ }
+
+ if ( ASDCP_SUCCESS(result) )
+ result = Writer.OpenWrite(Options.out_file, Info, DDesc);
+ }
+
+ if ( ASDCP_SUCCESS(result) )
+ {
+ ui32_t duration = 0;
+ result = Parser.Reset();
+
+ while ( ASDCP_SUCCESS(result) && duration++ < Options.duration )
+ {
+ result = Parser.ReadFrame(FrameBuffer);
+
+ if ( ASDCP_SUCCESS(result) )
+ {
+ if ( Options.verbose_flag )
+ FrameBuffer.Dump(stderr, Options.fb_dump_size);
+
+ if ( Options.encrypt_header_flag )
+ FrameBuffer.PlaintextOffset(0);
+ }
+
+ if ( ASDCP_SUCCESS(result) && ! Options.no_write_flag )
+ {
+ result = Writer.WriteFrame(FrameBuffer, Context, HMAC);
+
+ // The Writer class will forward the last block of ciphertext
+ // to the encryption context for use as the IV for the next
+ // frame. If you want to use non-sequitur IV values, un-comment
+ // the following line of code.
+ // if ( ASDCP_SUCCESS(result) && Options.key_flag )
+ // Context->SetIVec(RNG.FillRandom(IV_buf, CBC_BLOCK_SIZE));
+ }
+ }
+
+ if ( result == RESULT_ENDOFFILE )
+ result = RESULT_OK;
+ }
+
+ if ( ASDCP_SUCCESS(result) && ! Options.no_write_flag )
+ result = Writer.Finalize();
+
+ return result;
+}
+