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.Key; import java.security.SecureRandom; import javax.crypto.Cipher; import android.util.Base64; public class Main { static String encryptRsaB64(byte[] bytes, Key pubRsaKey) { try { Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "SC"); // cipher.init(Cipher.ENCRYPT_MODE, pubRsaKey, new SecureRandom()); SecureRandom sc = null; cipher.init(Cipher.ENCRYPT_MODE, pubRsaKey, sc); byte[] cipherText = cipher.doFinal(bytes); return encodeB64(cipherText); } catch (Exception e) { e.printStackTrace(); } return null; } static String encodeB64(byte[] bytes) { try { return Base64.encodeToString(bytes, Base64.URL_SAFE | Base64.NO_PADDING | Base64.NO_WRAP); } catch (Exception e) { } return null; } }