Auties00 / curve25519-java

Curve25519 implementation based on Java 11 and the Java Cryptographic Architecture

Curve25519

An implementation of Curve25519 based on Signal's using modern Java features and components of the Java Cryptographic architecture. Wrappers are reduced to zero and the library is fully modular. Java 11 or higher is required. It should work on any platform.

How to install

Maven

Add this dependency to your dependencies in the pom:

<dependencies>
    <dependency>
        <groupId>com.github.auties00</groupId>
        <artifactId>curve25519</artifactId>
        <version>1.2</version>
    </dependency>
</dependencies>

Gradle

Add this dependency to your build.gradle:

implementation 'com.github.auties00:curve25519:1.2'

How to use

Generating a Curve25519 keypair:

var keyPair = Curve25519.generateKeyPair();

Calculating a shared secret:

var sharedSecret = Curve25519.calculateAgreement(publicKey, privateKey);

Calculating a signature:

var signature = Curve25519.calculateSignature(privateKey, message);

Verifying a signature:

var isValid = Curve25519.verifySignature(publicKey, message, signature);

License

Copyright 2015 Open Whisper Systems

Licensed under the GPLv3: http://www.gnu.org/licenses/gpl-3.0.html