Java tutorial
//package com.java2s; /* * * Copyright (C) 2015 Orange Labs * * 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.security.KeyPair; import java.security.KeyPairGenerator; import java.security.SecureRandom; public class Main { static KeyPair generateRsaKeyPair() { return generateRsaKeyPair(512); } static KeyPair generateRsaKeyPair(int keySizeInBits) { if (keySizeInBits == 0 || keySizeInBits % 8 != 0) return null; try { KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA", "SC"); generator.initialize(keySizeInBits, new SecureRandom()); KeyPair pair = generator.generateKeyPair(); // Log.d("","public : "+keyToBase64(pair.getPublic())); // Log.d("","private: "+keyToBase64(pair.getPrivate())); return pair; } catch (Exception e) { e.printStackTrace(); } return null; } }