signature.SignLicense.java Source code

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Here is the source code for signature.SignLicense.java

Source

/*******************************************************************************
 * Copyright (c) 2015 Kaloyan Raev.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Kaloyan Raev - initial API and implementation
 *******************************************************************************/
package signature;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.security.PrivateKey;
import java.security.Signature;
import java.util.Arrays;
import java.util.Properties;

import org.apache.commons.codec.binary.Base64;

public class SignLicense {

    public static void main(String[] args) throws Exception {

        if (args.length != 2) {
            System.out.println("Usage: SignLicense licenseFile privateKey");
            System.exit(1);
        }

        Properties license = new Properties();
        license.load(new FileInputStream(args[0]));

        PrivateKey privateKey = Utils.readPrivateKeyFromFile(args[1]);
        Signature signature = Signature.getInstance("SHA1withDSA", "SUN");
        signature.initSign(privateKey);

        String[] propKeys = license.keySet().toArray(new String[0]);
        Arrays.sort(propKeys);
        for (String propKey : propKeys) {
            if (!"Signature".equals(propKey)) {
                String propValue = license.getProperty(propKey);
                signature.update(propValue.getBytes("UTF-8"));
            }
        }

        byte[] sig = signature.sign();
        license.setProperty("Signature", new String(Base64.encodeBase64(sig)));
        license.store(new FileOutputStream(args[0]), null);
    }

}