net.sourceforge.jaad.mp4.boxes.impl.oma

Class OMACommonHeadersBox

java.lang.Object

net.sourceforge.jaad.mp4.boxes.BoxImpl

net.sourceforge.jaad.mp4.boxes.FullBox

net.sourceforge.jaad.mp4.boxes.impl.oma.OMACommonHeadersBox

All Implemented Interfaces:

Box

public class OMACommonHeadersBox
extends FullBox

Field Summary

Fields inherited from class net.sourceforge.jaad.mp4.boxes.FullBox

flags, version

Fields inherited from class net.sourceforge.jaad.mp4.boxes.BoxImpl

children, offset, parent, size, type

Constructor Summary

Constructors

Constructor and Description
OMACommonHeadersBox()

Method Summary

Methods

Modifier and Type	Method and Description
void	decode(MP4InputStream in) Decodes the given input stream by reading this box and all of its children (if any).
byte[]	getContentID()
int	getEncryptionMethod() The encryption method defines how the encrypted content can be decrypted.
int	getPaddingScheme() The padding scheme defines how the last block of ciphertext is padded.
long	getPlaintextLength()
byte[]	getRightsIssuerURL()
java.util.Map<java.lang.String,java.lang.String>	getTextualHeaders()

Methods inherited from class net.sourceforge.jaad.mp4.boxes.BoxImpl

getChild, getChildren, getChildren, getLeft, getName, getOffset, getParent, getSize, getType, hasChild, hasChildren, readChildren, readChildren, setParams, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

OMACommonHeadersBox

public OMACommonHeadersBox()

Method Detail

decode

public void decode(MP4InputStream in)
            throws java.io.IOException

Description copied from class: BoxImpl

Decodes the given input stream by reading this box and all of its children (if any).

Overrides:

decode in class FullBox

Parameters:

in - an input stream

Throws:

java.io.IOException - if an error occurs while reading

getEncryptionMethod

public int getEncryptionMethod()

The encryption method defines how the encrypted content can be decrypted. Values for the field are defined in the following table:

Value	Algorithm
0	no encryption used
1	AES_128_CBC: AES symmetric encryption as defined by NIST. 128 bit keys, Cipher block chaining mode (CBC). For the first block a 128-bit initialisation vector (IV) is used. For DCF files, the IV is included in the OMADRMData as a prefix of the encrypted data. For non-streamable PDCF files, the IV is included in the IV field of the OMAAUHeader and the IVLength field in the OMAAUFormatBox MUST be set to 16. Padding according to RFC 2630
2	AES_128_CTR: AES symmetric encryption as defined by NIST. 128 bit keys, Counter mode (CTR). The counter block has a length of 128 bits. For DCF files, the initial counter value is included in the OMADRMData as a prefix of the encrypted data. For non-streamable PDCF files, the initial counter value is included in the IV field of the OMAAUHeader and the IVLength field in the OMAAUFormatBox MUST be set to 16. For each cipherblock the counter is incremented by 1 (modulo 2128). No padding.

Returns:

the encryption method

getPaddingScheme

public int getPaddingScheme()

The padding scheme defines how the last block of ciphertext is padded. Values of the padding scheme field are defined in the following table:

Value	Padding scheme
0	No padding (e.g. when using NULL or CTR algorithm)
1	Padding according to RFC 2630

Returns:

the padding scheme

getPlaintextLength

public long getPlaintextLength()

getContentID

public byte[] getContentID()

getRightsIssuerURL

public byte[] getRightsIssuerURL()

getTextualHeaders

public java.util.Map<java.lang.String,java.lang.String> getTextualHeaders()