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org.bouncycastle.math.ec.custom.djb

public Class Curve25519

extends AbstractFp
Class Inheritance
Imports
java.math.BigInteger, java.security.SecureRandom, org.bouncycastle.math.ec.AbstractECLookupTable, .ECConstants, .ECCurve, .ECFieldElement, .ECLookupTable, .ECPoint, org.bouncycastle.math.raw.Nat256, org.bouncycastle.util.encoders.Hex

Field Summary

Modifier and TypeField and Description
private static final BigInteger
C_a

private static final BigInteger
C_b

private static final ECFieldElement[]
CURVE25519_AFFINE_ZS

private static final int
CURVE25519_DEFAULT_COORDS

protected Curve25519Point
infinity

public static final BigInteger
q

Constructor Summary

AccessConstructor and Description
public
Curve25519()

Method Summary

Modifier and TypeMethod and Description
protected ECCurve
cloneCurve()

Implements abstract org.bouncycastle.math.ec.ECCurve.cloneCurve.

public ECLookupTable
createCacheSafeLookupTable(ECPoint[] points, int off, final int len)

Overrides org.bouncycastle.math.ec.ECCurve.createCacheSafeLookupTable.

Create a cache-safe lookup table for the specified sequence of points.

protected ECPoint
createRawPoint(ECFieldElement x, ECFieldElement y)

Implements abstract org.bouncycastle.math.ec.ECCurve.createRawPoint.

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

Implements abstract org.bouncycastle.math.ec.ECCurve.createRawPoint.

public ECFieldElement
fromBigInteger(BigInteger x)

Implements abstract org.bouncycastle.math.ec.ECCurve.fromBigInteger.

public int
getFieldSize()

Implements abstract org.bouncycastle.math.ec.ECCurve.getFieldSize.

public ECPoint
getInfinity()

Implements abstract org.bouncycastle.math.ec.ECCurve.getInfinity.

public BigInteger
getQ()

public ECFieldElement
randomFieldElement(SecureRandom r)

Overrides org.bouncycastle.math.ec.ECCurve.AbstractFp.randomFieldElement.

public ECFieldElement
randomFieldElementMult(SecureRandom r)

Overrides org.bouncycastle.math.ec.ECCurve.AbstractFp.randomFieldElementMult.

public boolean
supportsCoordinateSystem(int coord)

Overrides org.bouncycastle.math.ec.ECCurve.supportsCoordinateSystem.

Inherited from org.bouncycastle.math.ec.ECCurve.AbstractFp:
decompressPointisValidFieldElement

Field Detail

C_aback to summary
private static final BigInteger C_a
C_bback to summary
private static final BigInteger C_b
CURVE25519_AFFINE_ZSback to summary
private static final ECFieldElement[] CURVE25519_AFFINE_ZS
CURVE25519_DEFAULT_COORDSback to summary
private static final int CURVE25519_DEFAULT_COORDS
infinityback to summary
protected Curve25519Point infinity
qback to summary
public static final BigInteger q

Constructor Detail

Curve25519back to summary
public Curve25519()

Method Detail

cloneCurveback to summary
protected ECCurve cloneCurve()

Implements abstract org.bouncycastle.math.ec.ECCurve.cloneCurve.

createCacheSafeLookupTableback to summary
public ECLookupTable createCacheSafeLookupTable(ECPoint[] points, int off, final int len)

Overrides org.bouncycastle.math.ec.ECCurve.createCacheSafeLookupTable.

Doc from org.bouncycastle.math.ec.ECCurve.createCacheSafeLookupTable.

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.

createRawPointback to summary
protected ECPoint createRawPoint(ECFieldElement x, ECFieldElement y)

Implements abstract org.bouncycastle.math.ec.ECCurve.createRawPoint.

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

Implements abstract org.bouncycastle.math.ec.ECCurve.createRawPoint.

fromBigIntegerback to summary
public ECFieldElement fromBigInteger(BigInteger x)

Implements abstract org.bouncycastle.math.ec.ECCurve.fromBigInteger.

getFieldSizeback to summary
public int getFieldSize()

Implements abstract org.bouncycastle.math.ec.ECCurve.getFieldSize.

getInfinityback to summary
public ECPoint getInfinity()

Implements abstract org.bouncycastle.math.ec.ECCurve.getInfinity.

getQback to summary
public BigInteger getQ()
randomFieldElementback to summary
public ECFieldElement randomFieldElement(SecureRandom r)

Overrides org.bouncycastle.math.ec.ECCurve.AbstractFp.randomFieldElement.

randomFieldElementMultback to summary
public ECFieldElement randomFieldElementMult(SecureRandom r)

Overrides org.bouncycastle.math.ec.ECCurve.AbstractFp.randomFieldElementMult.

supportsCoordinateSystemback to summary
public boolean supportsCoordinateSystem(int coord)

Overrides org.bouncycastle.math.ec.ECCurve.supportsCoordinateSystem.