| 1 | package org.farng.mp3.id3; |
| 2 | |
| 3 | import org.farng.mp3.InvalidTagException; |
| 4 | import org.farng.mp3.object.ObjectByteArraySizeTerminated; |
| 5 | import org.farng.mp3.object.ObjectNumberFixedLength; |
| 6 | import org.farng.mp3.object.ObjectStringNullTerminated; |
| 7 | |
| 8 | import java.io.IOException; |
| 9 | import java.io.RandomAccessFile; |
| 10 | |
| 11 | /** |
| 12 | * <h3>4.25. Encryption method registration</h3> |
| 13 | * <p/> |
| 14 | * <p> To identify with which method a frame has been encrypted the<br> |
| 15 | * <p/> |
| 16 | * encryption method must be registered in the tag with this frame. The<br> 'Owner identifier' |
| 17 | * is a null-terminated string with a URL [URL]<br> containing an email address, or a link to a location |
| 18 | * where an email<br> address can be found, that belongs to the organisation responsible<br> |
| 19 | * for this specific encryption method. Questions regarding the<br> |
| 20 | * <p/> |
| 21 | * encryption method should be sent to the indicated email address. The<br> 'Method symbol' |
| 22 | * contains a value that is associated with this method<br> throughout the whole tag, in the range $80-F0. |
| 23 | * All other values are<br> reserved. The 'Method symbol' may optionally be followed by<br> |
| 24 | * encryption specific data. There may be several "ENCR" |
| 25 | * <p/> |
| 26 | * frames in a tag<br> but only one containing the same symbol and only one containing the<br> |
| 27 | * same owner identifier. The method must be used somewhere in the tag.<br> See the description of the |
| 28 | * frame encryption flag in the ID3v2<br> structure document [ID3v2-strct] for more information.</p> |
| 29 | * <p/> |
| 30 | * <p> <Header for 'Encryption method registration', ID: "ENCR"><br> |
| 31 | * Owner identifier <text string> $00<br> |
| 32 | * Method symbol $xx<br> |
| 33 | * <p/> |
| 34 | * Encryption data <binary data><br> </p> |
| 35 | * |
| 36 | * @author Eric Farng |
| 37 | * @version $Revision: 1.4 $ |
| 38 | */ |
| 39 | public class FrameBodyENCR extends AbstractID3v2FrameBody { |
| 40 | |
| 41 | /** |
| 42 | * Creates a new FrameBodyENCR object. |
| 43 | */ |
| 44 | public FrameBodyENCR() { |
| 45 | super(); |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Creates a new FrameBodyENCR object. |
| 50 | */ |
| 51 | public FrameBodyENCR(final FrameBodyENCR body) { |
| 52 | super(body); |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Creates a new FrameBodyENCR object. |
| 57 | */ |
| 58 | public FrameBodyENCR(final String owner, final byte methodSymbol, final byte[] data) { |
| 59 | setObject("Owner", owner); |
| 60 | setObject("Method Symbol", new Byte(methodSymbol)); |
| 61 | setObject("Encryption Data", data); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Creates a new FrameBodyENCR object. |
| 66 | */ |
| 67 | public FrameBodyENCR(final RandomAccessFile file) throws IOException, InvalidTagException { |
| 68 | this.read(file); |
| 69 | } |
| 70 | |
| 71 | public String getIdentifier() { |
| 72 | return "ENCR" + ((char) 0) + getOwner(); |
| 73 | } |
| 74 | |
| 75 | public void setOwner(final String owner) { |
| 76 | setObject("Owner", owner); |
| 77 | } |
| 78 | |
| 79 | public String getOwner() { |
| 80 | return (String) getObject("Owner"); |
| 81 | } |
| 82 | |
| 83 | protected void setupObjectList() { |
| 84 | appendToObjectList(new ObjectStringNullTerminated("Owner")); |
| 85 | appendToObjectList(new ObjectNumberFixedLength("Method Symbol", 1)); |
| 86 | appendToObjectList(new ObjectByteArraySizeTerminated("Encryption Data")); |
| 87 | } |
| 88 | } |