java.lang.Object
- org.bouncycastle.math.ec.ECFieldElement
- - org.bouncycastle.math.ec.ECFieldElement.AbstractFp
  - - org.bouncycastle.math.ec.ECFieldElement.Fp

All Implemented Interfaces:: ECConstants

Enclosing class:: ECFieldElement

public static class ECFieldElement.Fp
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 inherited from interface org.bouncycastle.math.ec.ECConstants
  EIGHT, FOUR, ONE, THREE, TWO, ZERO

Constructor Summary

Constructors
Constructor Description

Fp(java.math.BigInteger q, java.math.BigInteger x)
Deprecated.
Use ECCurve.fromBigInteger to construct field elements

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()`	return the field name for this field.
`int`	`getFieldSize()`
`java.math.BigInteger`	`getQ()`
`int`	`hashCode()`
`ECFieldElement`	`invert()`
`protected java.math.BigInteger`	`modAdd(java.math.BigInteger x1, java.math.BigInteger x2)`
`protected java.math.BigInteger`	`modDouble(java.math.BigInteger x)`
`protected java.math.BigInteger`	`modHalf(java.math.BigInteger x)`
`protected java.math.BigInteger`	`modHalfAbs(java.math.BigInteger x)`
`protected java.math.BigInteger`	`modInverse(java.math.BigInteger x)`
`protected java.math.BigInteger`	`modMult(java.math.BigInteger x1, java.math.BigInteger x2)`
`protected java.math.BigInteger`	`modReduce(java.math.BigInteger x)`
`protected java.math.BigInteger`	`modSubtract(java.math.BigInteger x1, java.math.BigInteger x2)`
`ECFieldElement`	`multiply(ECFieldElement b)`
`ECFieldElement`	`multiplyMinusProduct(ECFieldElement b, ECFieldElement x, ECFieldElement y)`
`ECFieldElement`	`multiplyPlusProduct(ECFieldElement b, ECFieldElement x, ECFieldElement y)`
`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`	`squareMinusProduct(ECFieldElement x, ECFieldElement y)`
`ECFieldElement`	`squarePlusProduct(ECFieldElement x, ECFieldElement y)`
`ECFieldElement`	`subtract(ECFieldElement b)`
`java.math.BigInteger`	`toBigInteger()`

Methods inherited from class org.bouncycastle.math.ec.ECFieldElement
bitLength, getEncoded, isOne, isZero, squarePow, testBitZero, toString

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

Constructor Detail
- Fp
```
public Fp(java.math.BigInteger q,
          java.math.BigInteger x)
```
  Deprecated.
  Use ECCurve.fromBigInteger to construct field elements

Method Detail

toBigInteger
```
public java.math.BigInteger toBigInteger()
```
Specified by:

toBigInteger in class ECFieldElement

getFieldName
```
public java.lang.String getFieldName()
```
return the field name for this field.

Specified by:

getFieldName in class ECFieldElement

Returns:

the string "Fp".

getFieldSize
```
public int getFieldSize()
```
Specified by:

getFieldSize in class ECFieldElement

getQ
```
public java.math.BigInteger getQ()
```

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

multiplyMinusProduct

public ECFieldElement multiplyMinusProduct(ECFieldElement b,
                                           ECFieldElement x,
                                           ECFieldElement y)

Overrides:: multiplyMinusProduct in class ECFieldElement

multiplyPlusProduct

public ECFieldElement multiplyPlusProduct(ECFieldElement b,
                                          ECFieldElement x,
                                          ECFieldElement y)

Overrides:: multiplyPlusProduct 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

squareMinusProduct

public ECFieldElement squareMinusProduct(ECFieldElement x,
                                         ECFieldElement y)

Overrides:: squareMinusProduct in class ECFieldElement

squarePlusProduct

public ECFieldElement squarePlusProduct(ECFieldElement x,
                                        ECFieldElement y)

Overrides:: squarePlusProduct 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

modAdd

protected java.math.BigInteger modAdd(java.math.BigInteger x1,
                                      java.math.BigInteger x2)

modDouble

protected java.math.BigInteger modDouble(java.math.BigInteger x)

modHalf

protected java.math.BigInteger modHalf(java.math.BigInteger x)

modHalfAbs

protected java.math.BigInteger modHalfAbs(java.math.BigInteger x)

modInverse

protected java.math.BigInteger modInverse(java.math.BigInteger x)

modMult

protected java.math.BigInteger modMult(java.math.BigInteger x1,
                                       java.math.BigInteger x2)

modReduce

protected java.math.BigInteger modReduce(java.math.BigInteger x)

modSubtract

protected java.math.BigInteger modSubtract(java.math.BigInteger x1,
                                           java.math.BigInteger x2)

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

Class ECFieldElement.Fp

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

Constructor Detail

Fp

Method Detail

toBigInteger

getFieldName

getFieldSize

getQ

add

addOne

subtract

multiply

multiplyMinusProduct

multiplyPlusProduct

divide

negate

square

squareMinusProduct

squarePlusProduct

invert

sqrt

modAdd

modDouble

modHalf

modHalfAbs

modInverse

modMult

modReduce

modSubtract

equals

hashCode