Java Requires Chilkat v11.0.0+

RSA Encrypt with Modulus and Exponent

See more RSA Examples

Demonstrates how to RSA encrypt with a given modulus and exponent. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.PublicKey;
import com.chilkatsoft.chilkat2.Rsa;
import com.chilkatsoft.chilkat2.Xml;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Rsa rsa = new Rsa();

        // Assuming you already have a base64 modulus and exponent,
        // wrap it in XML like this:
        String modulus = "qMBRpdYrAy5aMmo31NErUizh5sbweguSmh4wlK6uJEIDl+kwTlROnE34KOFExeTbJSX0WygPi+vWl0yNq7buIMUKpytossAAWut5khO3CQJxTk7G2gnEPNUUXHiExGgNrLzcSLv8YIlfVALhoRWyC67KOL+a+3taNq3h+BHeWhM=";
        String exponent = "AQAB";

        Xml xml = new Xml();
        xml.setTag("RSAPublicKey");
        xml.newChild2("Modulus", modulus);
        xml.newChild2("Exponent", exponent);

        PublicKey pubKey = new PublicKey();
        try {
            pubKey.loadFromString(xml.getXml());

            rsa.usePublicKey(pubKey);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        boolean usePrivateKey = false;
        String plainText = "message in a bottle";

        rsa.setEncodingMode("base64");
        String encryptedStrBase64 = rsa.encryptStringENC(plainText, usePrivateKey);
        System.out.println(encryptedStrBase64);
    }
}