| /* |
| * 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.apache.guacamole.auth.jdbc.security; |
| |
| import com.google.common.io.BaseEncoding; |
| import java.io.UnsupportedEncodingException; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| |
| /** |
| * Provides a SHA-256 based implementation of the password encryption |
| * functionality. |
| */ |
| public class SHA256PasswordEncryptionService implements PasswordEncryptionService { |
| |
| @Override |
| public byte[] createPasswordHash(String password, byte[] salt) { |
| |
| try { |
| |
| // Build salted password, if a salt was provided |
| StringBuilder builder = new StringBuilder(); |
| builder.append(password); |
| |
| if (salt != null) |
| builder.append(BaseEncoding.base16().encode(salt)); |
| |
| // Hash UTF-8 bytes of possibly-salted password |
| MessageDigest md = MessageDigest.getInstance("SHA-256"); |
| md.update(builder.toString().getBytes("UTF-8")); |
| return md.digest(); |
| |
| } |
| |
| // Throw hard errors if standard pieces of Java are missing |
| catch (UnsupportedEncodingException e) { |
| throw new UnsupportedOperationException("Unexpected lack of UTF-8 support.", e); |
| } |
| catch (NoSuchAlgorithmException e) { |
| throw new UnsupportedOperationException("Unexpected lack of SHA-256 support.", e); |
| } |
| |
| } |
| |
| } |