| /* |
| * 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 |
| * |
| * 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. |
| */ |
| package org.netbeans.lib.uihandler; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.security.GeneralSecurityException; |
| import java.security.KeyFactory; |
| import java.security.PrivateKey; |
| import java.security.PublicKey; |
| import java.security.spec.X509EncodedKeySpec; |
| import javax.crypto.Cipher; |
| |
| /** |
| * Password encryption/decryption utilities. |
| * |
| * @author Jindrich Sedek |
| */ |
| public class PasswdEncryption { |
| |
| private static final String delimiter = ":"; //NOI18N |
| public static final int MAX_ENCRYPTION_LENGHT = 100; |
| |
| /** |
| * Encrypt a text with a default public key. |
| * @param text text to encrypt |
| * @return encrypted text |
| * @throws IOException when I/O error occurs |
| * @throws GeneralSecurityException when transformation error occurs |
| */ |
| public static String encrypt(String text) throws IOException, GeneralSecurityException { |
| return encrypt(text, getPublicKey()); |
| } |
| |
| /** |
| * Encrypt a sequence of bytes a default public key. |
| * @param text byte array to encrypt |
| * @return encrypted bytes |
| * @throws IOException when I/O error occurs |
| * @throws GeneralSecurityException when transformation error occurs |
| */ |
| public static byte[] encrypt(byte[] text) throws IOException, GeneralSecurityException { |
| return encrypt(text, getPublicKey()); |
| } |
| |
| /** |
| * Encrypt a sequence of bytes. |
| * @param text byte array to encrypt |
| * @param key the public key used for the encryption |
| * @return encrypted bytes |
| * @throws IOException when I/O error occurs |
| * @throws GeneralSecurityException when transformation error occurs |
| */ |
| public static byte[] encrypt(byte[] text, PublicKey key) throws IOException, GeneralSecurityException { |
| assert (text.length <= MAX_ENCRYPTION_LENGHT); |
| Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding"); // NOI18N |
| rsaCipher.init(Cipher.ENCRYPT_MODE, key); |
| byte[] encoded = null; |
| encoded = rsaCipher.doFinal(text); |
| return encoded; |
| } |
| |
| /** |
| * Decrypt a sequence of bytes. |
| * @param text byte array to decrypt |
| * @param key the private key used for the decryption |
| * @return decrypted bytes |
| * @throws IOException when I/O error occurs |
| * @throws GeneralSecurityException when transformation error occurs |
| */ |
| public static byte[] decrypt(byte[] text, PrivateKey key) throws IOException, GeneralSecurityException { |
| Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding"); // NOI18N |
| rsaCipher.init(Cipher.DECRYPT_MODE, key); |
| byte[] decoded = null; |
| decoded = rsaCipher.doFinal(text); |
| return decoded; |
| } |
| |
| /** |
| * Encrypt a text. |
| * @param text text to encrypt |
| * @param key the public key used for the encryption |
| * @return encrypted text |
| * @throws IOException when I/O error occurs |
| * @throws GeneralSecurityException when transformation error occurs |
| */ |
| public static String encrypt(String text, PublicKey key) throws IOException, GeneralSecurityException { |
| byte[] encrypted = encrypt(text.getBytes(), key); |
| return arrayToString(encrypted); |
| } |
| |
| /** |
| * Decrypt a text. |
| * @param text text to decrypt |
| * @param key the private key used for the decryption |
| * @return decrypted text |
| * @throws IOException when I/O error occurs |
| * @throws GeneralSecurityException when transformation error occurs |
| */ |
| public static String decrypt(String text, PrivateKey key) throws IOException, GeneralSecurityException { |
| byte[] decrypted = decrypt(stringToArray(text), key); |
| return new String(decrypted); |
| } |
| |
| private static String arrayToString(byte[] array) { |
| String result = ""; |
| for (int i = 0; i < array.length; i++) { |
| byte b = array[i]; |
| result = result.concat(Byte.toString(b) + delimiter); |
| } |
| return result; |
| } |
| |
| private static byte[] stringToArray(String str) { |
| String[] numbers = str.split(delimiter); |
| byte[] result = new byte[numbers.length]; |
| for (int i = 0; i < numbers.length; i++) { |
| result[i] = Byte.parseByte(numbers[i]); |
| } |
| return result; |
| } |
| |
| private static PublicKey getPublicKey() throws IOException, GeneralSecurityException { |
| InputStream inputStr = PasswdEncryption.class.getResourceAsStream("pubKey"); // NOI18N |
| byte[] encodedKey = new byte[inputStr.available()]; |
| try { |
| inputStr.read(encodedKey); |
| } finally { |
| inputStr.close(); |
| } |
| X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(encodedKey); |
| KeyFactory kf = KeyFactory.getInstance("RSA"); // NOI18N |
| PublicKey publicKey = kf.generatePublic(publicKeySpec); |
| return publicKey; |
| } |
| } |