Package net.i2p.crypto.eddsa.math

Class FieldElement

java.lang.Object

net.i2p.crypto.eddsa.math.FieldElement

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

BigIntegerFieldElement, Ed25519FieldElement

public abstract class FieldElement
extends Object
implements Serializable

Note: concrete subclasses must implement hashCode() and equals()

Since:

0.9.15

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected final Field	f

Constructor Summary

Constructors

Constructor	Description
FieldElement(Field f)

Method Summary

Modifier and Type	Method	Description
abstract FieldElement	add(FieldElement val)
FieldElement	addOne()
abstract FieldElement	cmov(FieldElement val, int b)
FieldElement	divide(FieldElement val)
abstract FieldElement	invert()
boolean	isNegative()
abstract boolean	isNonZero()
abstract FieldElement	multiply(FieldElement val)
abstract FieldElement	negate()
abstract FieldElement	pow22523()
abstract FieldElement	square()
abstract FieldElement	squareAndDouble()
abstract FieldElement	subtract(FieldElement val)
FieldElement	subtractOne()
byte[]	toByteArray()	Encode a FieldElement in its $(b-1)$-bit encoding.

Methods inherited from class java.lang.Object

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

Field Details

f

protected final Field f

Constructor Details

FieldElement

public FieldElement(Field f)

Method Details

toByteArray

public byte[] toByteArray()

Encode a FieldElement in its $(b-1)$-bit encoding.

Returns:

the $(b-1)$-bit encoding of this FieldElement.

isNonZero

public abstract boolean isNonZero()

isNegative

public boolean isNegative()

add

public abstract FieldElement add(FieldElement val)

addOne

public FieldElement addOne()

subtract

public abstract FieldElement subtract(FieldElement val)

subtractOne

public FieldElement subtractOne()

negate

public abstract FieldElement negate()

divide

public FieldElement divide(FieldElement val)

multiply

public abstract FieldElement multiply(FieldElement val)

square

public abstract FieldElement square()

squareAndDouble

public abstract FieldElement squareAndDouble()

invert

public abstract FieldElement invert()

pow22523

public abstract FieldElement pow22523()

cmov

public abstract FieldElement cmov(FieldElement val,
 int b)

Since:

0.9.36