Java RSA generateKeys()

Description

generate Keys

License

Apache License

Declaration

public static Map<String, String> generateKeys()
            throws java.security.NoSuchAlgorithmException 

Method Source Code

//package com.java2s;
/*// w ww. j ava2s  .c o m
 * $URL$
 * $Id$
 *
 * Copyright (c) 2013- Charles R. Severance
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

import java.util.Map;
import java.util.TreeMap;
import java.util.Base64;
import java.security.*;

public class Main {
    public static Map<String, String> generateKeys()
            throws java.security.NoSuchAlgorithmException {
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
        keyGen.initialize(2048);

        KeyPair kp = keyGen.genKeyPair();
        byte[] publicKey = kp.getPublic().getEncoded();
        byte[] privateKey = kp.getPrivate().getEncoded();
        Base64.Encoder encoder = Base64.getEncoder();

        String publicRSA = "-----BEGIN PUBLIC KEY-----\n"
                + encoder.encodeToString(privateKey)
                + "\n-----END PUBLIC KEY-----\n";
        String privateRSA = "-----BEGIN PRIVATE KEY-----\n"
                + encoder.encodeToString(privateKey)
                + "\n-----END PRIVATE KEY-----\n";

        // If we need a pem style for these keys
        // String pemBase64 = javax.xml.bind.DatatypeConverter.printBase64Binary(publicKey);

        Map<String, String> returnMap = new TreeMap<String, String>();
        returnMap.put("platform_public", publicRSA);
        returnMap.put("platform_private", privateRSA);

        // Do it again for the tool
        keyGen = KeyPairGenerator.getInstance("RSA");
        keyGen.initialize(2048);

        kp = keyGen.genKeyPair();
        publicKey = kp.getPublic().getEncoded();
        privateKey = kp.getPrivate().getEncoded();

        publicRSA = "-----BEGIN RSA PUBLIC KEY-----\n"
                + encoder.encodeToString(privateKey)
                + "\n-----END RSA PUBLIC KEY-----\n";
        privateRSA = "-----BEGIN RSA PRIVATE KEY-----\n"
                + encoder.encodeToString(privateKey)
                + "\n-----END RSA PRIVATE KEY-----\n";

        returnMap.put("tool_public", publicRSA);
        returnMap.put("tool_private", privateRSA);

        return returnMap;

    }
}

Related

1. generateRSA(int keySize)
2. generateRSAKey(int keySize)
3. generateRSAKeyPair()
4. generateRSAKeyPair()