java.lang.Object
- org.bouncycastle.math.ec.ECCurve
- - org.bouncycastle.math.ec.ECCurve.AbstractFp
  - - org.bouncycastle.math.ec.custom.djb.Curve25519

public class Curve25519
extends ECCurve.AbstractFp

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

Field Summary

Fields
Modifier and Type Field Description

protected Curve25519Point infinity

static java.math.BigInteger q
- Fields inherited from class org.bouncycastle.math.ec.ECCurve
  a, b, cofactor, coord, COORD_AFFINE, COORD_HOMOGENEOUS, COORD_JACOBIAN, COORD_JACOBIAN_CHUDNOVSKY, COORD_JACOBIAN_MODIFIED, COORD_LAMBDA_AFFINE, COORD_LAMBDA_PROJECTIVE, COORD_SKEWED, endomorphism, field, multiplier, order

Constructor Summary

Constructors
Constructor Description

Curve25519()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected ECCurve`	`cloneCurve()`
`ECLookupTable`	`createCacheSafeLookupTable(ECPoint[] points, int off, int len)`	Create a cache-safe lookup table for the specified sequence of points.
`protected ECPoint`	`createRawPoint(ECFieldElement x, ECFieldElement y)`
`protected ECPoint`	`createRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs)`
`ECFieldElement`	`fromBigInteger(java.math.BigInteger x)`
`int`	`getFieldSize()`
`ECPoint`	`getInfinity()`
`java.math.BigInteger`	`getQ()`
`ECFieldElement`	`randomFieldElement(java.security.SecureRandom r)`
`ECFieldElement`	`randomFieldElementMult(java.security.SecureRandom r)`
`boolean`	`supportsCoordinateSystem(int coord)`

Methods inherited from class org.bouncycastle.math.ec.ECCurve.AbstractFp
decompressPoint, isValidFieldElement

Methods inherited from class org.bouncycastle.math.ec.ECCurve
checkPoint, checkPoints, checkPoints, configure, createDefaultMultiplier, createPoint, decodePoint, equals, equals, getA, getAllCoordinateSystems, getB, getCofactor, getCoordinateSystem, getEndomorphism, getField, getMultiplier, getOrder, getPreCompInfo, hashCode, importPoint, normalizeAll, normalizeAll, precompute, validatePoint

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

Field Detail

q

public static final java.math.BigInteger q

infinity
```
protected Curve25519Point infinity
```

Constructor Detail
- Curve25519
```
public Curve25519()
```

Method Detail

cloneCurve
```
protected ECCurve cloneCurve()
```
Specified by:

cloneCurve in class ECCurve

supportsCoordinateSystem
```
public boolean supportsCoordinateSystem(int coord)
```
Overrides:

supportsCoordinateSystem in class ECCurve

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

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

getFieldSize in class ECCurve

fromBigInteger

public ECFieldElement fromBigInteger(java.math.BigInteger x)

Specified by:: fromBigInteger in class ECCurve

createRawPoint

protected ECPoint createRawPoint(ECFieldElement x,
                                 ECFieldElement y)

Specified by:: createRawPoint in class ECCurve

createRawPoint

protected ECPoint createRawPoint(ECFieldElement x,
                                 ECFieldElement y,
                                 ECFieldElement[] zs)

Specified by:: createRawPoint in class ECCurve

getInfinity
```
public ECPoint getInfinity()
```
Specified by:

getInfinity in class ECCurve

createCacheSafeLookupTable
```
public ECLookupTable createCacheSafeLookupTable(ECPoint[] points,
                                                int off,
                                                int len)
```
Description copied from class: ECCurve

Create a cache-safe lookup table for the specified sequence of points. All the points MUST belong to this ECCurve instance, and MUST already be normalized.

Overrides:

createCacheSafeLookupTable in class ECCurve

randomFieldElement

public ECFieldElement randomFieldElement(java.security.SecureRandom r)

Overrides:: randomFieldElement in class ECCurve.AbstractFp

randomFieldElementMult

public ECFieldElement randomFieldElementMult(java.security.SecureRandom r)

Overrides:: randomFieldElementMult in class ECCurve.AbstractFp

Modifier and Type	Field	Description
`protected Curve25519Point`	`infinity`
`static java.math.BigInteger`	`q`

Class Curve25519

Nested Class Summary

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

Field Summary

Fields inherited from class org.bouncycastle.math.ec.ECCurve

Constructor Summary

Method Summary

Methods inherited from class org.bouncycastle.math.ec.ECCurve.AbstractFp

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

Methods inherited from class java.lang.Object

Field Detail

q

infinity

Constructor Detail

Curve25519

Method Detail

cloneCurve

supportsCoordinateSystem

getQ

getFieldSize

fromBigInteger

createRawPoint

createRawPoint

getInfinity

createCacheSafeLookupTable

randomFieldElement

randomFieldElementMult