Package com.bfo.box

Class C2PA_AssertionHashBMFF

java.lang.Object

com.bfo.box.Box

com.bfo.box.JUMBox

com.bfo.box.CborContainerBox

com.bfo.box.C2PA_AssertionHashBMFF

All Implemented Interfaces:

C2PA_Assertion

public class C2PA_AssertionHashBMFF
extends CborContainerBox
implements C2PA_Assertion

A C2PA Assertion for the "c2pa.hash.bmff" or "c2pa.hash.bmff.v2" types

Note: this is a placeholder class; verify and sign will throw an UnsupportedOperationException

Since:

5

Constructor Summary

Constructors

Constructor	Description
C2PA_AssertionHashBMFF(boolean v2)	Create a new BMFF assertion

Method Summary

Modifier and Type	Method	Description
boolean	isV2()	Return whether this BMFF is version 2
List<C2PAStatus>	sign()	Calculate the digest during signing.
List<C2PAStatus>	verify()	Verify this assertion, returning a list of status codes describing why this assertion failed or an empty list if it succeeded.

Methods inherited from class com.bfo.box.CborContainerBox

cbor, getBox

Methods inherited from class com.bfo.box.JUMBox

find, find, label, subtype

Methods inherited from class com.bfo.box.Box

add, dump, duplicate, first, fullType, getEncoded, insertBefore, isSparse, length, next, parent, remove, toString, type

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.bfo.box.C2PA_Assertion

asBox, getManifest

Constructor Details

C2PA_AssertionHashBMFF

public C2PA_AssertionHashBMFF(boolean v2)

Create a new BMFF assertion

Parameters:

v2 - if true, create a version 2 BMFF

Method Details

isV2

public boolean isV2()

Return whether this BMFF is version 2

Returns:

true if version 2

verify

public List<C2PAStatus> verify()
                        throws IOException

Description copied from interface: C2PA_Assertion

Verify this assertion, returning a list of status codes describing why this assertion failed or an empty list if it succeeded. The default implementation succeeds, and returns an empty list.

Specified by:

verify in interface C2PA_Assertion

Returns:

a list of status codes, which may be empty on success

Throws:

IOException - if the assertion verification involved I/O and the IO layer threw an exception

sign

public List<C2PAStatus> sign()
                      throws IOException

Calculate the digest during signing. Not yet implemented, throws UnsupportedOperationException

Returns:

a list of failure codes, or an empty list on success

Throws:

IOException - if such an exception was encountered during signing