SignVerifyDataEdDsa.java

Example of signature and verification using EdDsa.

See Note on examples.

package doxy.examples;
 
import com.dinamonetworks.Dinamo;
 
import br.com.trueaccess.TacException;
import br.com.trueaccess.TacNDJavaLib;
 
public class SignVerifyDataEdDsa {
 
    public static void main(String[] args) throws TacException {
 
        Dinamo api = new Dinamo();
        api.openSession("127.0.0.1", "master", "12345678", false);
 
        String message = "teste teste teste";
        byte messageBytes[] = message.getBytes();
 
        String keyId = "ed22519";
        api.createKey(keyId, TacNDJavaLib.ALG_ECX_ED25519);
 
        int hasAlg = TacNDJavaLib.ALG_IDENTITY_FUNC;
 
        //Assina utilizando o nome da chave
        byte[] signature = api.signHashedData(keyId, hasAlg, messageBytes);
 
        api.verifySignature(keyId, hasAlg, signature, message.getBytes());
 
        //Assina utilizando key handle
        byte[] privateKeyHandle = api.getUserKey(keyId);
 
        signature = api.signHashedData(privateKeyHandle, hasAlg, messageBytes, 0);
        api.releaseKeyHandle(privateKeyHandle);
 
        api.verifySignature(keyId, hasAlg, signature, message.getBytes());
 
        api.deleteKey(keyId);
        api.closeSession();
    }
 
}