001/*
002 * SonarQube, open source software quality management tool.
003 * Copyright (C) 2008-2014 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * SonarQube is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * SonarQube is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public License
017 * along with this program; if not, write to the Free Software Foundation,
018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
019 */
020
021package org.sonar.process;
022
023import javax.annotation.Nullable;
024import java.util.HashMap;
025import java.util.Locale;
026import java.util.Map;
027import java.util.regex.Matcher;
028import java.util.regex.Pattern;
029
030/**
031 * @since 3.0
032 */
033public final class Encryption {
034
035  private static final String BASE64_ALGORITHM = "b64";
036
037  private static final String AES_ALGORITHM = "aes";
038  private final AesCipher aesCipher;
039
040  private final Map<String, Cipher> ciphers = new HashMap<String, Cipher>();
041  private static final Pattern ENCRYPTED_PATTERN = Pattern.compile("\\{(.*?)\\}(.*)");
042
043  public Encryption(@Nullable String pathToSecretKey) {
044    aesCipher = new AesCipher(pathToSecretKey);
045    ciphers.put(BASE64_ALGORITHM, new Base64Cipher());
046    ciphers.put(AES_ALGORITHM, aesCipher);
047  }
048
049  public boolean isEncrypted(String value) {
050    return value.indexOf('{') == 0 && value.indexOf('}') > 1;
051  }
052
053  public String decrypt(String encryptedText) {
054    Matcher matcher = ENCRYPTED_PATTERN.matcher(encryptedText);
055    if (matcher.matches()) {
056      Cipher cipher = ciphers.get(matcher.group(1).toLowerCase(Locale.ENGLISH));
057      if (cipher != null) {
058        return cipher.decrypt(matcher.group(2));
059      }
060    }
061    return encryptedText;
062  }
063
064}