ECC-25519

A library for Java and Android to use Ed25519 and Curve25518.

License	Apache License version 2.0
Categories	Java Languages Net
GroupId	net.vrallev.ecc
ArtifactId	ecc-25519-java
Last Version	1.0.3
Release Date	May 19, 2016
Type	jar
Description	ECC-25519 A library for Java and Android to use Ed25519 and Curve25518.
Project URL	https://github.com/vRallev/ECC-25519
Source Code Management	https://github.com/vRallev/ECC-25519

Download ecc-25519-java

Filename	Size
ecc-25519-java-1.0.3.pom
ecc-25519-java-1.0.3.jar	69 KB
ecc-25519-java-1.0.3-sources.jar	47 KB
ecc-25519-java-1.0.3-javadoc.jar	162 KB

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/net.vrallev.ecc/ecc-25519-java/ -->
<dependency>
    <groupId>net.vrallev.ecc</groupId>
    <artifactId>ecc-25519-java</artifactId>
    <version>1.0.3</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/net.vrallev.ecc/ecc-25519-java/
implementation 'net.vrallev.ecc:ecc-25519-java:1.0.3'

Gradle Kotlin

// https://jarcasting.com/artifacts/net.vrallev.ecc/ecc-25519-java/
implementation ("net.vrallev.ecc:ecc-25519-java:1.0.3")

Apache Buildr

'net.vrallev.ecc:ecc-25519-java:jar:1.0.3'

Apache Ivy

<dependency org="net.vrallev.ecc" name="ecc-25519-java" rev="1.0.3">
  <artifact name="ecc-25519-java" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='net.vrallev.ecc', module='ecc-25519-java', version='1.0.3')
)

Scala SBT

libraryDependencies += "net.vrallev.ecc" % "ecc-25519-java" % "1.0.3"

Leiningen

[net.vrallev.ecc/ecc-25519-java "1.0.3"]

Dependencies

compile (1)

Group / Artifact	Type	Version
net.i2p.crypto : eddsa	jar	0.1.0

test (1)

Group / Artifact	Type	Version
junit : junit	jar	4.11

Project Modules

There are no modules declared in this project.

Deprecated

This project is not maintained anymore.

ECC-25519

This project helps to use elliptic curve cryptography (ECC) with Curve25519 by Daniel J Bernstein. It combines multiple libraries.

All credit goes to following libraries. Please respect their licenses!

Android:

• https://github.com/dazoe/Android.Ed25519
• https://code.google.com/p/curve25519-java/

Java:

• https://github.com/str4d/ed25519-java/
• https://code.google.com/p/curve25519-java/

Download

Download the latest version or grab via Gradle:

dependencies {
    compile 'net.vrallev.ecc:ecc-25519-android:1.0.3' 	// Android
    compile 'net.vrallev.ecc:ecc-25519-java:1.0.3' 		// JVM
}

Usage

byte[] seed = "My random seed".getBytes();
byte[] privateKey = KeyHolder.createPrivateKey(seed); // creates a valid private key (seed hashed with SHA-256) 

KeyHolder keyHolder = new KeyHolder(privateKey); // computes valid public keys
Ecc25519Helper helper = new Ecc25519Helper(keyHolder); // generate our helper class 

byte[] sharedSecret = helper.diffieHellman(); // you can also pass a private and public key

byte[] message = "My message".getBytes();
byte[] signature = helper.sign(message); // computes the signature with the private key
boolean validSignature = helper.isValidSignature(message, signature); // checks the message with the public key from keyHolder instance

License

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Versions

Version
1.0.3 May 19, 2016
1.0.2 May 19, 2016
1.0.1 Jul 5, 2015
1.0.0 Jul 28, 2014