org.cryptimeleon.math.structures.groups.elliptic

Class PairingTargetGroupElementImpl

java.lang.Object

org.cryptimeleon.math.structures.groups.elliptic.PairingTargetGroupElementImpl

All Implemented Interfaces:

UniqueByteRepresentable, Representable, GroupElementImpl

Direct Known Subclasses:

BarretoNaehrigTargetGroupElementImpl, SupersingularTargetGroupElementImpl

public abstract class PairingTargetGroupElementImpl
extends java.lang.Object
implements GroupElementImpl, UniqueByteRepresentable

Field Summary

Fields

Modifier and Type	Field and Description
protected ExtensionFieldElement	elem
protected PairingTargetGroupImpl	group

Constructor Summary

Constructors

Constructor and Description
PairingTargetGroupElementImpl(PairingTargetGroupImpl g, ExtensionFieldElement fe)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
ExtensionFieldElement	getElem()
Representation	getRepresentation() The representation of this object.
PairingTargetGroupImpl	getStructure() Retrieves the group this element belongs to.
int	hashCode()
PairingTargetGroupElementImpl	inv() Calculates the inverse of this group element.
PairingTargetGroupElementImpl	op(GroupElementImpl e) Calculates the result of this op e.
java.lang.String	toString()
ByteAccumulator	updateAccumulator(ByteAccumulator accumulator) Updates the ByteAccumulator with the unique byte representation of this object.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.cryptimeleon.math.structures.groups.GroupElementImpl

isNeutralElement, pow, square

Methods inherited from interface org.cryptimeleon.math.hash.UniqueByteRepresentable

getUniqueByteRepresentation

Field Detail

elem

protected ExtensionFieldElement elem

group

protected PairingTargetGroupImpl group

Constructor Detail

PairingTargetGroupElementImpl

public PairingTargetGroupElementImpl(PairingTargetGroupImpl g,
                                     ExtensionFieldElement fe)

Method Detail

getElem

public ExtensionFieldElement getElem()

getRepresentation

public Representation getRepresentation()

Description copied from interface: Representable

The representation of this object. Used for serialization. A convenient way to implement this is using @link ReprUtil

Specified by:

getRepresentation in interface Representable

Returns:

a Representation or null if an equal object can be recreated without any information.

See Also:

Representation

getStructure

public PairingTargetGroupImpl getStructure()

Description copied from interface: GroupElementImpl

Retrieves the group this element belongs to.

Specified by:

getStructure in interface GroupElementImpl

inv

public PairingTargetGroupElementImpl inv()

Description copied from interface: GroupElementImpl

Calculates the inverse of this group element.

Specified by:

inv in interface GroupElementImpl

Returns:

an element x such that x.op(this).equals(getStructure().getNeutralElement())

op

public PairingTargetGroupElementImpl op(GroupElementImpl e)
                                 throws java.lang.IllegalArgumentException

Description copied from interface: GroupElementImpl

Calculates the result of this op e.

Specified by:

op in interface GroupElementImpl

Parameters:

e - right hand side of the operation

Returns:

the element resulting from the group operation

Throws:

java.lang.IllegalArgumentException - if e is of the wrong type

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

updateAccumulator

public ByteAccumulator updateAccumulator(ByteAccumulator accumulator)

Description copied from interface: UniqueByteRepresentable

Updates the ByteAccumulator with the unique byte representation of this object.

The input to the accumulators update function is an injective (with respect to a given domain) byte encoding of this object.

For many use-cases, the AnnotatedUbrUtil can be used to quickly implement this method.

Specified by:

updateAccumulator in interface UniqueByteRepresentable

Returns:

the same accumulator as was input