encrypt decrypt example

Author: sannies

examples/src/main/java/com/googlecode/mp4parser/CencEncryptDecrypt.java

@@ -0,0 +1,55 @@
+package com.googlecode.mp4parser;
+
+import com.coremedia.iso.boxes.Container;
+import com.googlecode.mp4parser.authoring.Movie;
+import com.googlecode.mp4parser.authoring.Track;
+import com.googlecode.mp4parser.authoring.builder.DefaultMp4Builder;
+import com.googlecode.mp4parser.authoring.container.mp4.MovieCreator;
+import com.googlecode.mp4parser.authoring.tracks.CencDecryptingTrackImpl;
+import com.googlecode.mp4parser.authoring.tracks.CencEncryptingTrackImpl;
+import com.googlecode.mp4parser.authoring.tracks.CencEncyprtedTrack;
+
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+import java.io.ByteArrayOutputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.nio.channels.Channels;
+import java.util.UUID;
+
+/**
+ * Created by user on 22.07.2014.
+ */
+public class CencEncryptDecrypt {
+    public static void main(String[] args) throws IOException {
+        DefaultMp4Builder mp4Builder = new DefaultMp4Builder();
+
+        Movie mOrig = MovieCreator.build(CencEncryptDecrypt.class.getProtectionDomain().getCodeSource().getLocation().getFile() + "/1365070268951.mp4");
+
+        Movie mEncryptOut = new Movie();
+        SecretKey sk = new SecretKeySpec(new byte[]{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, "AES");
+        for (Track track : mOrig.getTracks()) {
+            mEncryptOut.addTrack(new CencEncryptingTrackImpl(track, UUID.randomUUID(), sk));
+        }
+
+        Container cEncrypted = mp4Builder.build(mEncryptOut);
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        cEncrypted.writeContainer(Channels.newChannel(baos));
+
+        Movie mEncryptIn = MovieCreator.build (new MemoryDataSourceImpl(baos.toByteArray()));
+        Movie mDecrypt = new Movie();
+
+        for (Track track : mEncryptIn.getTracks()) {
+            if (track instanceof CencEncyprtedTrack) {
+                mDecrypt.addTrack(new CencDecryptingTrackImpl((CencEncyprtedTrack) track, sk));
+            } else {
+                mDecrypt.addTrack(track);
+            }
+        }
+
+        Container cDecrypted = mp4Builder.build(mDecrypt);
+        FileOutputStream fos = new FileOutputStream("output.mp4");
+        cDecrypted.writeContainer(fos.getChannel());
+
+    }
+}