Here you can find the source of generateKeyPair(String keyAlgorithm, int keySize)
public static void generateKeyPair(String keyAlgorithm, int keySize) throws NoSuchAlgorithmException
//package com.java2s; /**/*w w w . j a v a 2s. c o m*/ * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 * <p> * http://www.apache.org/licenses/LICENSE-2.0 * <p> * 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.security.KeyPair; import java.security.KeyPairGenerator; import java.security.NoSuchAlgorithmException; import java.util.Base64; public class Main { public static void generateKeyPair(String keyAlgorithm, int keySize) throws NoSuchAlgorithmException { KeyPairGenerator kpg = KeyPairGenerator.getInstance(keyAlgorithm); // RSA kpg.initialize(keySize); // 2048 KeyPair kp = kpg.generateKeyPair(); System.out.println("-----BEGIN PRIVATE KEY-----"); System.out.println(Base64.getMimeEncoder().encodeToString(kp.getPrivate().getEncoded())); System.out.println("-----END PRIVATE KEY-----"); System.out.println("-----BEGIN PUBLIC KEY-----"); System.out.println(Base64.getMimeEncoder().encodeToString(kp.getPublic().getEncoded())); System.out.println("-----END PUBLIC KEY-----"); } }