java.lang.Object
- org.bouncycastle.math.ec.ECFieldElement
- - org.bouncycastle.math.ec.ECFieldElement.AbstractFp
  - - org.bouncycastle.math.ec.custom.djb.Curve25519FieldElement

All Implemented Interfaces:: ECConstants

public class Curve25519FieldElement
extends ECFieldElement.AbstractFp

Nested Class Summary
- Nested classes/interfaces inherited from class org.bouncycastle.math.ec.ECFieldElement
  ECFieldElement.AbstractF2m, ECFieldElement.AbstractFp, ECFieldElement.F2m, ECFieldElement.Fp

Field Summary

Fields
Modifier and Type Field Description

static java.math.BigInteger Q

protected int[] x
- Fields inherited from interface org.bouncycastle.math.ec.ECConstants
  EIGHT, FOUR, ONE, THREE, TWO, ZERO

Constructor Summary

Constructors
Modifier Constructor Description

Curve25519FieldElement()

protected Curve25519FieldElement(int[] x)

Curve25519FieldElement(java.math.BigInteger x)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ECFieldElement`	`add(ECFieldElement b)`
`ECFieldElement`	`addOne()`
`ECFieldElement`	`divide(ECFieldElement b)`
`boolean`	`equals(java.lang.Object other)`
`java.lang.String`	`getFieldName()`
`int`	`getFieldSize()`
`int`	`hashCode()`
`ECFieldElement`	`invert()`
`boolean`	`isOne()`
`boolean`	`isZero()`
`ECFieldElement`	`multiply(ECFieldElement b)`
`ECFieldElement`	`negate()`
`ECFieldElement`	`sqrt()`	return a sqrt root - the routine verifies that the calculation returns the right value - if none exists it returns null.
`ECFieldElement`	`square()`
`ECFieldElement`	`subtract(ECFieldElement b)`
`boolean`	`testBitZero()`
`java.math.BigInteger`	`toBigInteger()`

Methods inherited from class org.bouncycastle.math.ec.ECFieldElement
bitLength, getEncoded, multiplyMinusProduct, multiplyPlusProduct, squareMinusProduct, squarePlusProduct, squarePow, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - Q
```
public static final java.math.BigInteger Q
```
  - x
```
protected int[] x
```
- Constructor Detail
  - Curve25519FieldElement
```
public Curve25519FieldElement(java.math.BigInteger x)
```
  - Curve25519FieldElement
```
public Curve25519FieldElement()
```
  - Curve25519FieldElement
```
protected Curve25519FieldElement(int[] x)
```
- Method Detail
  - isZero
```
public boolean isZero()
```
    Overrides:
    
    isZero in class ECFieldElement
  - isOne
```
public boolean isOne()
```
    Overrides:
    
    isOne in class ECFieldElement
  - testBitZero
```
public boolean testBitZero()
```
    Overrides:
    
    testBitZero in class ECFieldElement
  - toBigInteger
```
public java.math.BigInteger toBigInteger()
```
    Specified by:
    
    toBigInteger in class ECFieldElement
  - getFieldName
```
public java.lang.String getFieldName()
```
    Specified by:
    
    getFieldName in class ECFieldElement
  - getFieldSize
```
public int getFieldSize()
```
    Specified by:
    
    getFieldSize in class ECFieldElement
  - add
```
public ECFieldElement add(ECFieldElement b)
```
    Specified by:
    
    add in class ECFieldElement
  - addOne
```
public ECFieldElement addOne()
```
    Specified by:
    
    addOne in class ECFieldElement
  - subtract
```
public ECFieldElement subtract(ECFieldElement b)
```
    Specified by:
    
    subtract in class ECFieldElement
  - multiply
```
public ECFieldElement multiply(ECFieldElement b)
```
    Specified by:
    
    multiply in class ECFieldElement
  - divide
```
public ECFieldElement divide(ECFieldElement b)
```
    Specified by:
    
    divide in class ECFieldElement
  - negate
```
public ECFieldElement negate()
```
    Specified by:
    
    negate in class ECFieldElement
  - square
```
public ECFieldElement square()
```
    Specified by:
    
    square in class ECFieldElement
  - invert
```
public ECFieldElement invert()
```
    Specified by:
    
    invert in class ECFieldElement
  - sqrt
```
public ECFieldElement sqrt()
```
    return a sqrt root - the routine verifies that the calculation returns the right value - if none exists it returns null.
    
    Specified by:
    
    sqrt in class ECFieldElement
  - equals
```
public boolean equals(java.lang.Object other)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object

Modifier	Constructor	Description
	`Curve25519FieldElement()`
`protected`	`Curve25519FieldElement(int[] x)`
	`Curve25519FieldElement(java.math.BigInteger x)`

Fields
Modifier and Type	Field	Description
`static java.math.BigInteger`	`Q`
`protected int[]`	`x`

Class Curve25519FieldElement

Nested Class Summary

Nested classes/interfaces inherited from class org.bouncycastle.math.ec.ECFieldElement

Field Summary

Fields inherited from interface org.bouncycastle.math.ec.ECConstants

Constructor Summary

Method Summary

Methods inherited from class org.bouncycastle.math.ec.ECFieldElement

Methods inherited from class java.lang.Object

Field Detail

Q

x

Constructor Detail

Curve25519FieldElement

Curve25519FieldElement

Curve25519FieldElement

Method Detail

isZero

isOne

testBitZero

toBigInteger

getFieldName

getFieldSize

add

addOne

subtract

multiply

divide

negate

square

invert

sqrt

equals

hashCode