Crypto Keys Java Library

This project wraps public and private keys for common cryptographic functionalities for the following elliptic curves:

• Ed25519
• Secp256k1

Dependencies

• Java 8
• Maven

Build instructions

./mvnw package

Maven repository

Using gradle

// for using ed25519 key pair
implementation com.syntifi.crypto:crypto-key-ed25519:VERSION

// for using secp256k1 key pair
implementation com.syntifi.crypto:crypto-key-secp256k1:VERSION

Using maven

<dependencies>
    ...
    <!-- for using ed25519 key pair -->
    <dependency>
        <groupId>com.syntifi.crypto</groupId>
        <artifactId>crypto-key-ed25519</artifactId>
        <version>VERSION</version>
    </dependency>

    <!-- for using secp256k1 key pair -->
    <dependency>
        <groupId>com.syntifi.crypto</groupId>
        <artifactId>crypto-key-secp256k1</artifactId>
        <version>VERSION</version>
    </dependency>
</dependencies>

How to

1. Read a public key from pem file

Ed25519PublicKey publicKey = new Ed25519PublicKey();
publicKey.readPublicKey("public_key.pem");

Secp256k1PublicKey pubKey = new Secp256k1PublicKey();
publicKey.readPublicKey("public_key.pem");

2. Write a public key to pem file

publicKey.writePublicKey("public_key.pem");

3. Read a private key from pem file

Ed25519PrivateKey privateKey = new Ed25519PrivateKey();
privateKey.readPrivateKey("private_key.pem");

Secp256k1PrivateKey privateKey = new Secp256k1PrivateKey();
privateKey.readPrivateKey("private_key.pem");

4. Write a private key to pem file

privateKey.writPrivateKey("private_key.pem");

5. Sign message

byte[] signature = privateKey.sign("Message".getBytes());

6. Verify Signature

 Boolean verified = publicKey.verify(message.getBytes(), Hex.decode(hexSignature));