| package org.apache.fulcrum.crypto.provider; |
| |
| /* |
| * 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. |
| */ |
| |
| |
| import org.apache.fulcrum.crypto.CryptoAlgorithm; |
| |
| import java.util.Random; |
| |
| /** |
| * Implements Standard Unix crypt(3) for use with the Crypto Service. |
| * |
| * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> |
| * @version $Id$ |
| */ |
| |
| public class UnixCrypt |
| implements CryptoAlgorithm |
| { |
| |
| /** The seed to use */ |
| private String seed = null; |
| |
| /** standard Unix crypt chars (64) */ |
| private static final char[] SALT_CHARS = |
| (("abcdefghijklmnopqrstuvwxyz" + |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./").toCharArray()); |
| |
| |
| /** |
| * C'tor |
| * |
| */ |
| |
| public UnixCrypt() |
| { |
| } |
| |
| /** |
| * This class never uses anything but |
| * UnixCrypt, so it is just a dummy |
| * (Fixme: Should we throw an exception if |
| * something is requested that we don't support? |
| * |
| * @param cipher Cipher (ignored) |
| */ |
| |
| public void setCipher(String cipher) |
| { |
| /* dummy */ |
| } |
| |
| /** |
| * Setting the seed for the UnixCrypt |
| * algorithm. If a null value is supplied, |
| * or no seed is set, then a random seed is used. |
| * |
| * @param seed The seed value to use. |
| */ |
| |
| public void setSeed(String seed) |
| { |
| this.seed = seed; |
| } |
| |
| /** |
| * encrypt the supplied string with the requested cipher |
| * |
| * @param value The value to be encrypted |
| * @return The encrypted value |
| * @throws Exception An Exception of the underlying implementation. |
| */ |
| public String encrypt(String value) |
| throws Exception |
| { |
| if (seed == null) |
| { |
| Random randomGenerator = new java.util.Random(); |
| int numSaltChars = SALT_CHARS.length; |
| |
| seed = (new StringBuffer()) |
| .append(SALT_CHARS[Math.abs(randomGenerator.nextInt()) |
| % numSaltChars]) |
| .append(SALT_CHARS[Math.abs(randomGenerator.nextInt()) |
| % numSaltChars]) |
| .toString(); |
| } |
| |
| return org.apache.fulcrum.crypto.impl.UnixCrypt.crypt(seed, value); |
| } |
| } |