ch.epfl.dedis.lib.crypto

Class Ed25519Point

java.lang.Object

ch.epfl.dedis.lib.crypto.Ed25519Point

All Implemented Interfaces:

Point

public class Ed25519Point
extends Object
implements Point

Constructor Summary

Constructors

Constructor and Description
Ed25519Point(byte[] b)
Ed25519Point(net.i2p.crypto.eddsa.math.GroupElement e)
Ed25519Point(Point p)
Ed25519Point(String str)

Method Summary

Modifier and Type	Method and Description
Point	add(Point other)
static Point	base()
Point	copy()
byte[]	data()
static Point	embed(byte[] data) Embed data into a point.
static Point	embed(byte[] data, Random rand) Embed data into a point.
static Point	embed(byte[] data, org.bouncycastle.crypto.Xof xof) Embed data into a point.
boolean	equals(Object other)
Point	getZero()
boolean	isZero()
Point	mul(Scalar s)
Point	negate()
byte[]	toBytes()
net.i2p.crypto.eddsa.EdDSAPublicKey	toEdDSAPub()
com.google.protobuf.ByteString	toProto()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Ed25519Point

public Ed25519Point(byte[] b)
             throws CothorityCryptoException

Throws:

CothorityCryptoException

Ed25519Point

public Ed25519Point(String str)
             throws CothorityCryptoException

Throws:

CothorityCryptoException

Ed25519Point

public Ed25519Point(Point p)

Ed25519Point

public Ed25519Point(net.i2p.crypto.eddsa.math.GroupElement e)

Method Detail

copy

public Point copy()

Specified by:

copy in interface Point

equals

public boolean equals(Object other)

Specified by:

equals in interface Point

Overrides:

equals in class Object

mul

public Point mul(Scalar s)

Specified by:

mul in interface Point

add

public Point add(Point other)

Specified by:

add in interface Point

toProto

public com.google.protobuf.ByteString toProto()

Specified by:

toProto in interface Point

toBytes

public byte[] toBytes()

Specified by:

toBytes in interface Point

isZero

public boolean isZero()

Specified by:

isZero in interface Point

getZero

public Point getZero()

Specified by:

getZero in interface Point

toString

public String toString()

Specified by:

toString in interface Point

Overrides:

toString in class Object

toEdDSAPub

public net.i2p.crypto.eddsa.EdDSAPublicKey toEdDSAPub()

negate

public Point negate()

Specified by:

negate in interface Point

data

public byte[] data()
            throws CothorityCryptoException

Specified by:

data in interface Point

Throws:

CothorityCryptoException

embed

public static Point embed(byte[] data)

Embed data into a point. If the data is longer than 29 bytes then the extra bytes are ignored.

Parameters:

data - is the data to embed.

Returns:

the embedded point.

embed

public static Point embed(byte[] data,
                          Random rand)

Embed data into a point. If the data is longer than 29 bytes then the extra bytes are ignored.

Parameters:

data - is the data to embed.

rand - is the source of randomness to generate missing bytes in the point

Returns:

the embedded point.

embed

public static Point embed(byte[] data,
                          org.bouncycastle.crypto.Xof xof)

Embed data into a point. If the data is longer than 29 bytes then the extra bytes are ignored.

Parameters:

data - is the data to embed

xof - is the extendable output function used to fill the missing bytes in the point.

Returns:

the embedded point.

base

public static Point base()